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Objective:To discuss the inhibitory effect of chelerythrine(CHE)on the migration,invasion,and epithelial-mesenchymal transition(EMT)of the human ovarian cancer SKOV3 cells,and to clarify the associated mechanism.Methods:The SKOV3 cells were cultured in vitro and divided into control group and 2.5,5.0,10.0,20.0,and 40.0 μmol·L-1 CHE groups.Methylthiazolydiphenyl-tetrazolium(MTT)assay was used to detect the inhibitory rates of proliferation of the cells in various groups.The SKOV3 cells were cultured in vitro and divided into control group,transforming growth factor-β1(TGF-β1)group,TGF-β1+5 μmol·L-1 CHE group,and TGF-β1+10 μmol·L-1 CHE group.Cell scratch assay was used to detect the migration rates of the cells in various groups;Transwell chamber assay was used to detect the numbers of migration and invasion cells in various groups;Western blotting method was used to detect the expression levels of E-cadherin,N-cadherin,and Vimentin proteins in the cells in various groups;immunofluorescence staining method was used to detect the fluorescence intensities of E-cadherin and N-cadherin in the cells in various groups.Results:The MTT assay results showed that compared with control group,the inhibitory rates of proliferation of the cells in 5.0,10.0,20.0,and 40.0 μmol·L-1 CHE groups were significantly increased(P<0.05 or P<0.01).The cell scratch assay results showed that compared with control group,the migration rate of the cells in TGF-β1 group was increased(P<0.01);compared with TGF-β1 group,the migration rates of the cells in TGF-β1+5 μmol·L-1 CHE group and TGF-β1+10 μmol·L-1 CHE group were significantly decreased(P<0.01).The Transwell chamber assay results showed that compared with control group,the numbers of migration and invasion cells in TGF-β1 group were significantly increased(P<0.05);compared with TGF-β1 group,the numbers of migration and invasion cells in TGF-β1+5 μmo·l L-1 CHE group and TGF-β1+10 μmo·l L-1 CHE group were significantly decreased(P<0.01).The Western blotting results showed that compared with control group,the expression level of E-cadherin protein in the cells in TGF-β1 group was significantly decreased(P<0.01),while the expression levels of N-cadherin and Vimentin proteins were increased(P<0.05 or P<0.01);compared with TGF-β1 group,the expression levels of E-cadherin protein in the cells in TGF-β1+5 μmol·L-1 CHE group and TGF-β1+10 μmol·L-1 CHE group were significantly increased(P<0.01),and the expression levels of N-cadherin and Vimentin proteins were significantly decreased(P<0.01).The immunofluorescence staining results showed that compared with control group,the fluorescence intensity of E-cadherin in the cells in TGF-β1 group was decreased,and the fluorescence intensity of N-cadherin was increased;compared with TGF-β1 group,the fluorescence intensities of E-cadherin in the cells in TGF-β 1+5 μmol·L-1 CHE group and TGF-β1+10 μmol·L-1 CHE group were significantly increased,and the fluorescence intensities of N-cadherin were decreased.Conclusion:CHE can inhibit the proliferation,migration,invasion,and EMT of the human ovarian cancer SKOV3 cells.
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Objective:To design a specialized ultrasound therapeutic device for rabbit urethral scars and to verify its applicability and effectiveness.Methods:New Zealand male rabbits were used as the experimental objects, and the ultrasound therapeutic instrument was customized according to the structure and size of the rabbit penises. The ultrasound therapeutic instrument included the ultrasound pulse emission and control system, the final-stage amplifier, and the ultrasound probe. Firstly, the ultrasound probe was designed according to the size and structure of rabbit penises, and the parameters of the ultrasound probe were determined by COMSOL finite element simulation and actual testing of the sound field distribution. Secondly, the driving circuit of the ultrasound probe was designed according to the parameters of the elements. Then the ultrasound pulse emission and control system based on the field-programmable gate array (FPGA) and the serial screen were designed. Subsequently, the ultrasound therapeutic instrument was subjected to a performance test and a safety test. The ultrasound therapeutic instrument was constructed to include the ultrasound amplifier and the ultrasound probe. Finally, a rabbit urethra reconstruction model was constructed, and eight white rabbits were randomly divided into a model group and an experimental group. The rabbits in the experimental group received the ultrasound therapeutic instrument for treatment of the urethra immediately, with an ultrasound frequency of 2 MHz, a pulse interval of 10 ms, and an output sound intensity of 0.73 W/cm 2. The treatment was performed twice a week (on Tuesday and Thursday), with 10 min of irradiation each time, lasting for four weeks. The rabbits in the model group did not receive any treatment. The area percentage of transforming growth factor-β1 (TGF-β1), matrix metalloproteinase-2 (MMP-2), and tumor necrosis factor-α (TNF-α) staining-positive areas in rabbit urethral tissues were quantitatively analyzed, and the urethral circumference was calculated using Image J software. Results:Due to the addition of sound-absorbing materials, the sound pressure distribution in the treatment chamber was more uniform, and the average value of the standing wave ratio was 1.11, indicating that the structural design met the design requirements. In the overall performance test, the natural focal position of the three ultrasonic transducers was 10 mm, and the consistency of the sound field distribution meet the experimental requirements. The relationship between the peak sound pressure of each transducer and the power supply voltage was close to linear. The output sound intensity ranged from 0.35 to 0.74 W/cm 2, which met the experimental requirements. With the ultrasound output, the temperature of the test point increased slowly, and this experiment could increase the temperature of the tissue by up to 3.3 ℃, which would not lead to thermal damage to the tissue. Animal experiment results showed that the immunopositive area fraction of TGF-β1 in the urethral tissues of rabbits in the experimental group [(4.21 ± 1.32)%] was smaller than that of the model group [(8.53 ± 3.43)%] ( t = ?4.24, P < 0.001). The immunopositive area fraction of TNF-α in the urethral tissues of rabbits in the experimental group [(5.14 ± 2.72)%] was smaller than that of the model group [(7.23 ± 1.57)%] ( t = ?3.37, P < 0.05). The MMP-2 level in the urethral tissue of rabbits in the experimental group [(10.65 ± 2.24)%] was higher than that of the model group[(6.98 ± 2.74)%] ( t = 2.19, P < 0.05). The urethral circumference [(12 209 ± 2 743) μm] was higher than that of the model group [(10 127 ± 2 237) μm] ( t = 15.46, P < 0.05). Conclusions:An ultrasound therapeutic instrument dedicated to rabbit urethral scars has been successfully designed and can be used for the study of ultrasound treatment of rabbit urethral scars.
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Objective To study the effect of marein on myocardial fibrosis in diabetic mice.Methods Ten lep-tin receptor gene defective heterozygous(db/m)mice aged 5-6 weeks were selected as the control group and 30 diabetic mice with leptin receptor gene defective db/db were divided into:db/db group(db/db,n=10),metformin(Met)positive group(280 mg/kg daily,n=10)and marein drug intervention group(50 mg/kg,n=10).After continuous administration for 8 weeks,the cardiac morphological changes were observed by HE staining and Masson staining.The distribution and expression of vimentin were detected by immunohistochemis-try method.The expression of fibronectin,vimentin,and transforming growth factor-β1(TGF-β1)protein in cardiac tissue was detected by Western blot.Results Myocardial fiber hypertrophy was observed in db/db group,and myocardial structural damage was improved in metformin group and marein group.Compared with db/m group,the expression of myocardial collagen fiber in db/db group increased(P＜0.01),while the expression of myo-cardial collagen fiber in metformin group and marein group decreased(P＜0.01).Compared with the control group,the expression of vimentin in myocardial tissue of db/db group was significantly increased(P＜0.01),while the expression of vimentin in metformin group and marein group was significantly decreased(P＜0.01).The expression of fibronectin,vimentin and TGF-β1 in db/db group was significantly increased as compared with those in db/m group(P＜0.01),while the expression of fibronectin,vimentin and TGF-β1 in metformin group and marein group were significantly decreased(P＜0.01).Conclusions Marein improves myocardial fibrosis in diabetic db/db mice.
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BACKGROUND:Type 2 diabetes is often accompanied by renal dysfunction.Increasing studies have shown that exercise can alleviate metabolic disorders and renal dysfunction in diabetic patients.However,the specific mechanism underlying the renal protective effect of exercise in patients with type 2 diabetes is rarely reported. OBJECTIVE:To investigate whether aerobic exercise can improve renal function in type 2 diabetic rats by inhibiting transforming growth factor β1/Notch1 pathway. METHODS:Male Sprague-Dawley rats were randomly divided into normal control group and diabetes model group.After successful modeling,they were randomly divided into diabetes control group and diabetes exercise group.Rats in the diabetes exercise group were subjected to an 8-week aerobic exercise.Samples were collected after exercise,and the relevant indexes of glucose and lipid metabolism and renal function were detected by automatic biochemical analyzer and ELISA.The microscopic structure of renal cortex was observed by electron microscope.ELISA and RT-PCR were used to detect the expression of related proteins and genes in rat kidney tissue. RESULTS AND CONCLUSION:Compared with the normal control group,fasting blood glucose,total cholesterol,and triglyceride levels and insulin resistance index were significantly increased in the diabetic control group(P＜0.05).Aerobic exercise could significantly reduce fasting blood glucose and triglyceride levels(P＜0.05).Compared with the normal control group,the diabetic control group had significantly increased contents of urinary microalbumin,serum urea nitrogen and serum creatinine(P＜0.01),thickened renal basement membrane,mesangial matrix hyperplasia,accompanied by a certain degree of foot process fusion,and obvious lesion of the kidney.Aerobic exercise could significantly down-regulate the overexpressions of urinary microalbumin,serum urea nitrogen and serum creatinine in type 2 diabetic rats(P＜0.01),and significantly improve the pathological changes of the kidney in diabetic rats.Compared with the normal control group,the protein and gene expression levels of transforming growth factor β1,Notch1,Jagged1 and Hes1 in rat kidney tissue were significantly increased in the diabetic control group(P＜0.01).Aerobic exercise had a highly significant inhibitory effect on the overexpression of transforming growth factor β1,Notch1 and Jagged1 proteins and genes(P＜0.01)and also significantly inhibited the overexpression of Hes1 protein(P＜0.05).In conclusion,aerobic exercise can protect renal function and delay the pathological progression of the kidney in diabetic rats,which may be achieved by inhibiting the overexpression of transforming growth factor β1/Notch1 signaling pathway.
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BACKGROUND:Mechanical stimulation has been confirmed to promote osteogenic differentiation of bone marrow stromal stem cells,but the mechanism is unknown.Primary cilia are important mechanoreceptors and regulate various signaling pathways such as TGF-β1/BMP-2/SMAD.They are likely to be important targets for mechanical regulation of bone marrow stromal stem cells. OBJECTIVE:To investigate the effect and mechanism of fluid shear stress on osteogenic differentiation of bone marrow stromal stem cells. METHODS:Rat bone marrow stromal stem cells were divided into control group,mechanical stimulation group(fluid shear mechanics intervention by shaking table),mechanical stimulation + IFT88 silencing group(mechanical stimulation + silencing IFT88 expression with siRNA).After 24 hours of intervention,qRT-PCR was utilized to determine the expression of transforming growth factor β1 and bone morphogenetic protein 2.Western blot assay was used to detect the expression of phosphorylated SMAD2/3 protein.Immunofluorescent staining of primary cilia was conducted and morphology was analyzed. RESULTS AND CONCLUSION:Shear stress stimulation could promote the transcriptional activity of transforming growth factor β1 and bone morphogenetic protein 2 genes,and increase the expression of phosphorylated SMAD2/3 protein.After siRNA interfered with primary cilia,this mechanical response effect was significantly reduced.There was a Spearman correlation between the change ratio of the primary cilium area of bone marrow stromal stem cells and the increased ratio of transforming growth factor β1 and bone morphogenetic protein 2 gene transcription.These findings indicate that primary cilia/intraflagellar transport mediates the activation of fluid shear stress-responsive transforming growth factor β1/bone morphogenetic protein 2/SMAD signaling pathway and promotes osteogenic differentiation of bone marrow stromal stem cells.
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BACKGROUND:Human placental mesenchymal stem cells have been shown to be effective in inhibiting the development of pulmonary fibrosis,but the underlying mechanisms remain unclear. OBJECTIVE:To investigate the therapeutic effect and related mechanism of human placental mesenchymal stem cells on silica-induced pulmonary fibrosis in human embryonic lung fibroblasts(MRC-5). METHODS:CCK-8 assay was used to detect the effects of different mass concentrations of silica on the proliferation of MRC-5 at different time points.Immunofluorescence staining was used to screen out the best stimulating mass concentration and time of silica for subsequent experiments.MRC-5 cells were divided into blank group,silica group,and silica + human placental mesenchymal stem cell group.In the blank group,cells were not treated.In the silica group,MRC-5 cells were stimulated with 100 μg/mL silica for 48 hours.In the silica + human placental mesenchymal stem cell group,MRC-5 cells were stimulated with 100 μg/mL silica for 48 hours and then co-cultured with human placental mesenchymal stem cells for 24 hours.Immunofluorescence staining was used to detect the expression of α-smooth muscle actin and collagen type I in cells of each group.Western blot assay was used to detect the expressions of pulmonary fibrosis-related proteins and TGF-β1/Smad 3 signaling pathway-related proteins in cells of each group. RESULTS AND CONCLUSION:(1)CCK-8 assay results suggested that 100 μg/mL silica was the best mass concentration and time to stimulate MRC-5 cells for 48 hours.(2)Immunofluorescence staining results showed that the expression of α-smooth muscle actin and collagen type I in the silica + human placental mesenchymal stem cell group was significantly lower than that in the silica group.(3)Western blot assay results showed that compared with the silica group,the protein expression levels of α-smooth muscle actin,collagen type I,N-cadherin,fibronectin,transforming growth factor-β1,p-Smad3,and Smad3 in the silica + human placental mesenchymal stem cell group were decreased,and the expression of E-cadherin was increased.The difference was statistically significant(P<0.05).(4)The results showed that human placental mesenchymal stem cells had a significant therapeutic effect on silica-induced pulmonary fibrosis.Human placental mesenchymal stem cells can inhibit the development of pulmonary fibrosis by regulating transforming growth factor-β1/Smad3 signaling pathway.
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ObjectiveTo investigate the application value of Qingre Huashi Sanjie enema prescription in the treatment of the patients with sequelae of pelvic inflammatory disease （syndrome of combined dampness，heat，and stasis） and the effects of this prescription on inflammatory mediators and T lymphocyte subsets. MethodThe patients with sequelae of pelvic inflammatory disease （syndrome of combined dampness，heat，and stasis） treated from May 2022 to August 2023 were included in this study and randomized into two groups （79 cases）. The control group was treated with conventional Western medicine，and the observation group was treated with Qingre Huashi Sanjie enema prescription on the basis of the therapy in the control group. Both groups were treated for 12 weeks. The serum levels of monocyte chemoattractant protein-1 （MCP-1），transforming growth factor-β1 （TGF-β1），and interleukin-6 （IL-6） were measured by enzyme linked immunoserbent assay （ELISA） before and after treatment in both groups. The erythrocyte sedimentation rate （ESR） and fibrinogen （FIB） were measured by an automatic blood rheology analyzer before and after treatment in both groups. The serum levels of CD4+，CD4+/CD8+ before and after treatment in both groups were measured by flow cytometry. The traditional Chinese medicine （TCM） symptom score and the 36-item short form survey （SF-36） score were assessed before and after treatment. The uterine artery resistance index （RI），uterine artery pulsatility index （PI），and uterine artery peak systolic velocity （PSV） were measured by Doppler before and after treatment. The clinical efficacy and the occurrence of adverse reactions were compared between the two groups. ResultAfter treatment，the levels of MCP-1，TGF-β1，IL-6，ESR，and FIB decreased in both groups （P<0.01），and the decreases were larger in the observation group than in the control group （P<0.05，P<0.01）. After treatment，the serum levels of CD4+ and CD4+/CD8+ elevated in both groups （P<0.01） and the observation group had higher levels of CD4+ and CD4+/CD8+ than the control group （P<0.05，P<0.01）. The treatment in both groups decreased the TCM symptom score and TCM sign score and increased the SF-36 score （P<0.01），and the changes were more significant in the observation group than in the control group （P<0.05，P<0.01）. In addition，the treatment lowered RI and PI and elevated PSV （P<0.01），and the changes in these indicators were more significant in the observation group than in the control group （P<0.01）. The total response rate in the observation group was 93.67% （74/79），which was higher than that （79.75%，63/79） in the control group （χ2=6.645，P<0.05）. There was no significant difference in the occurrence of adverse reactions between the two groups. ConclusionFor the patients with sequelae of pelvic inflammatory disease （syndrome of combined dampness，heat，and stasis），Qingre Huashi Sanjie enema prescription can reduce inflammation，attenuate hypercoagulability，improve hemodynamics，and regulate the immune function，demonstrating a definite therapeutic effect.
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Objective To analyze the influencing factors of choroidopathy(choroidal atrophy and choroidal neovas-cularization)secondary to high myopia based on Logistic regression analysis and to construct a Nomogram risk prediction model based on the related factors,so as to provide guidance for clinical treatment.Methods A total of 340 patients(680 eyes)with high myopia admitted to Beijing Jishuitan Hospital from January 2021 to January 2023 were selected and di-vided into group A(170 patients,340 eyes)and group B(170 patients,340 eyes).The incidence of choroidopathy in the two groups was compared.The groups A and B were divided into two subgroups,subgroup a and subgroup b,according to whether choroidopathy occurred or not.Multivariate Logistic regression analysis was carried out to explore the influencing factors of choroidopathy secondary to high myopia.A Nomogram risk prediction model for choroidopathy secondary to high myopia was constructed based on the influencing factors and externally validated.Results In groups A and B,the age,proportion of diabetes mellitus,axial length,and level of seruim transforming growth factor β1(TGF-β1)of patients in subgroup a were higher than those in the subgroup b,and the diopter was lower than that in the subgroup b(all P＜0.05).The Logistic regression analysis showed that age,diabetes mellitus,axial length and serum TGF-β1 level were independent risk factors for choroidopathy secondary to high myopia,and diopter was a protective factor(all P＜0.05).Age,diabetes mellitus,axial length and serum TGF-β1 level were positively correlated risk factors for choroidopathy secondary to high myopia,and diopter was a negatively correlated risk factor(all P＜0.05).The area under the curve of the Nomogram risk prediction model for predicting choroidopathy secondary to high myopia was 0.818,and the calibration was good.Con-clusion Age,diabetes mellitus,axial length,diopter and serum TGF-β1 level are the influential factors for choroidopa-thy secondary to high myopia.The Nomogram risk prediction model established based on these factors has a certain value for predicting choroidopathy secondary to high myopia.The clinical therapeutic schedules should be made based on this model to reduce the risk of secondary choroidopathy.
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Objective To investigate the effect of phlorofucofuroeckol A(PFFE-A)on the proliferation and invasion of colorectal carcinoma cells and its regulation of transforming growth factor-β1(TGF-β1)and mothers against decapentaplegic hom-olog 2/3(Smad2/3)signaling pathway.Methods The cells were processed as follows:the cells were intervened with low,medium and high doses of 50,100,and 150 μmol·L-1 of PFFE-A,respectively and cells in the normal control group were also established.5-Ethynyl-2'-deoxyuridine(EdU)staining was used to detect the cell proliferation.The transwell chamber was used to detect the invasion ability.A xenograft colon cancer nude mice model was used to detect the growth and metastasis ability of the cells in vivo.Real-time quantitative polymerase chain reaction(RT-qPCR)was used to detect the expression of epithelial-to-mes-enchymal transition(EMT)related genes.Western blotting was used to detect the expression levels of TGF-β1 and p-Smad2/3 in cells.Results Compared with normal control group,the proliferation rate,the number of invaded cells,the tumor mass,the pro-portion of tumor metastasis,the expression of N-cadherin mRNA,the expression of TGF-β1 and p-Smad2/3 were significantly de-creased(P＜0.05),and the mRNA expression of E-cadherin was significantly increased(P＜0.05).All were presented with a sig-nificant dose-dependent(P＜0.05).Conclusion PFFE-A could inhibit the EMT process of tumor cells,inhibit the prolifera-tion and invasion of HT29 cells in vitro,and down-regulate the growth and metastasis of HT29 cells in vivo,which may be achieved by down-regulating TGF-β1/Smad2/3 signaling pathway.
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AIM:To investigate the effect of cellular Sloan-Kettering Institute(c-SKI)protein expression on myocardial fibrosis in mice treated with andrgrapholide(Andr).METHODS:Male C57 mice were randomly divided into control group,model group[isoprenaline(ISO)group]and ISO+Andr group,with 6 mice per group.The mice in ISO and ISO+Andr groups were subcutaneously injected with ISO,while those in control group were injected with normal sa-line.The mice in ISO+Andr group was intragastrically given Andr,while those in ISO and control groups were given nor-mal saline.The histopathological characteristics of the heart tissue were detected by HE and Masson staining after 8 weeks of administration.The expression levels of c-SKI and extracellular matrix(ECM)-related proteins were detected by immu-nohistochemistry or Western blot.The c-SKI mRNA level was detected by qPCR.Human cardiac fibroblasts(HCFBs)were treated with different concentrations of Andr for 48 h.The cell viability was detected by CCK-8 assay,and the c-SKI and ECM-related protein levels were detected by Western blot.The transdifferentiated cell model was treated with the lowest effective dose of Andr.The cell morphology was observed under a microscope,the levels of c-SKI and ECM-related pro-teins were assessed by Western blot,and the c-SKI mRNA level was detected by qPCR.The transforming growth factor-β1(TGF-β1)-treated HCFBs were treated with the combination of c-SKI knockdown and Andr.The cell viability was detected by CCK-8 assay,and the levels of c-SKI and ECM-related proteins were detected by Western blot.RESULTS:After the intervention of Andr,the myocardial fibers in mice were neatly arranged,the morphology of myocardial cells was basically normal,the cell membrane was intact,and the collagen volume fraction was significantly reduced(P＜0.01).The mRNA and protein levels of c-SKI were significantly up-regulated(P＜0.05 or P＜0.01),and the protein levels of fibronectin 1(FN1),α-smooth muscle actin(α-SMA),vimentin and collagen type I(Col I)were significantly down-regulated(P＜0.01).After 50 μmol/L Andr treatment for 48 h,the viability of HCFBs was significantly decreased(P＜0.01),the pro-tein levels of Col I,α-SMA,vimentin and FN1 were significantly down-regulated(P＜0.01),and c-SKI expression was significantly up-regulated(P＜0.01).Compared with PBS group,the number of the HCFBs in TGF-β1 group increased with flattened and irregular morphological change,and the FN1,α-SMA,Col I and vimentin levels were significantly in-creased(P＜0.01),while c-SKI expression was significantly decreased(P＜0.01).After Andr intervention,the induction effect of TGF-β1 on HCFBs was reversed.Knockdown of c-SKI combined with Andr treatment in HCFBs significantly down-regulated c-SKI expression(P＜0.01),significantly up-regulated FN1,α-SMA,vimentin and Col I levels(P＜0.05),and significantly increased the cell viability.CONCLUSION:Andrgrapholide may affect the TGF-β1 signaling pathway by regulating c-SKI expression,and inhibit the proliferation of myocardial fibroblasts and ECM deposition,thus inhibiting myocardial fibrosis.
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ObjectiveTo observe the therapeutic effect of Shugan Huazheng prescription on hepatic fibrosis model rats induced by carbon tetrachloride （CCl4） and explore whether it plays its role through hypoxia-induced factor-1α/vascular endothelial growth factor/transforming growth factor-β1 （HIF-1α/VEGF/TGF-β1） pathway. MethodA total of 54 male SPF SD rats were randomly divided into six groups： blank group， model group， colchicine group （0.2 mg·kg-1）， and high-， medium-， and low-dose groups （29.52， 14.76， and 7.38 g·kg-1） of Shugan Huazheng prescription， with nine rats in each group. The molding was conducted three times a week for eight weeks. Administration began the day after the first injection， and the drug intervention was once a day for eight weeks. On the day after the last administration， the rats were deprived of food and water， and they were killed the next day， during which the physiological status of each group of rats was dynamically monitored. The pathological changes in the liver were observed by hematoxylin-eosin （HE） staining， and the content of hydroxyproline （HYP） and angiotensin Ⅱ （AngⅡ） in liver tissue were detected by enzyme-related immunosorbent assay （ELISA）. Real-time fluorescent quantitative PCR （Real-time PCR） was used to determine the mRNA expression levels of HIF-1α， VEGF， and TGF-β1 in liver tissue， and immunohistochemical method （IHC） and Western blot were used to detect the protein expression levels of HIF-1α， VEGF， and TGF-β1 in liver tissue. ResultCompared with the blank group， the overall condition of rats in the model group decreased significantly. The proliferation of connective tissue and the increase in adipose cells between hepatocytes were obvious. The content of HYP and Ang was increased. The mRNA and protein expressions of HIF-1α， VEGF， and TGF-β1 were increased to varying degrees （P<0.05）. Compared with the model group， the proliferation of connective tissue and inflammatory cell infiltration in the liver tissue of colchicine and Shugan Huazheng prescription groups were reduced. The content of HYP and Ang was decreased. The mRNA and protein expression levels of HIF-1α， VEGF， and TGF-β1 were decreased， and the colchicine group and high-dose group of Shugan Huazheng prescription were the most significant （P<0.05）. ConclusionShugan Huazheng prescription has an obvious therapeutic effect on CCl4-induced hepatic fibrosis model rats. Its therapeutic mechanism may be related to the regulation of the HIF-1α/VEGF/TGF-β1 signaling pathway and the improvement of hepatic hypoxia， vascular remodeling， and the syndrome of Qi deficiency and blood stasis in hepatic fibrosis.
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ObjectiveTo explore the mechanism of Qigesan （QGS） in intervening in the migration and invasion of esophageal carcinoma TE-1 cells. MethodMicroarray technology was used to screen differentially expressed genes （DEGs） in the normal group and the QGS group， and the ontological functions and signaling pathways of DEGs were analyzed. The thiazolyl tetrazolium （MTT） assay was used to detect the effect of QGS on the viability of TE-1 cells. In the subsequent experiments for verification， a blank group， a transforming growth factor-β1 （TGF-β1） group， a TGF-β1 + QGS group， and a TGF-β1 + SB431542 group were set up. The cell morphology in each experimental group was observed by microscopy. The migration and invasion abilities of cells were detected by wound healing assay， and the mRNA expression levels of E-Cadherin， vimentin， Smad2， and Smad7 were detected by Real-time quantitative polymerase chain reaction （Real-time PCR）. The protein expression of E-Cadherin， vimentin， p-Smad2/3， Smad2/3， and Smad7 was detected by Western blot. ResultThere were 1 487 DEGs between the QGS group and the blank group， including 1 080 down-regulated ones （accounting for 72.63%） and 407 up-regulated ones. The down-regulated genes were mainly involved in biological processes such as cytoskeletal protein binding， ATP binding， adenylate nucleotide binding， and adenylate ribonucleotide binding， and the involved Kyoto Encyclopedia of Genes and Genomes （KEGG） pathways included TGF-β signaling pathway， cell cycle， extracellular matrix-receptor interaction protein， tumor pathways， and oocyte meiosis. The up-regulated genes were mainly involved in RNA binding， DNA binding， transcriptional regulator activity， transcriptional activator activity， and nucleotide binding， and the KEGG pathways involved mainly included mitogen-activated protein kinase （MAPK） signaling pathway， bladder cancer， renal cell carcinoma， cancer pathways， and p53 signaling pathway. Compared with the blank group， the inhibition rate of cell viability of TE-1 cells increased after QGS （20， 30， 40， 60， 80 mg·L-1） intervention for 12， 24， 36， 48， 60 h （P<0.05）， and the inhibition rate was time- and dose-dependent. Compared with the blank group， the TGF-β1 group showed lengthened cells with fibroblast phenotype. Compared with the TGF-β1 group， the TGF-β1 + QGS group showed shortened cells with normal morphology and epithelial phenotype. The cell morphology in the TGF-β1 + SB431542 group was similar to that of the TGF-β1 + QGS group. Compared with the blank group， the TGF-β1 group showed potentiated ability of cell migration and invasion （P<0.05）. Compared with the TGF-β1 group， the TGF-β1 + QGS group and the TGF-β1 + SB431542 group showed inhibited and weakened migration and invasion abilities of cells （P<0.05）. However， there was no significant difference in migration and invasion abilities between the TGF-β1 + QGS group and the TGF-β1 + SB431542 group. The mRNA expression levels of vimentin and Smad2 in the TGF-β1 group were higher （P<0.05）， and the mRNA expression levels of E-Cadherin and Smad7 were lower （P<0.05） than those in the blank group. Compared with the TGF-β1 group， the TGF-β1 + QGS group and the TGF-β1+ SB431542 group exhibited decreased expression levels of vimentin and Smad2 mRNA （P<0.05）， and elevated expression levels of E-Cadherin and Smad7 mRNA （P<0.05）. Compared with the blank group， the TGF-β1 group showed up-regulated protein expression levels of vimentin， p-Smad2/3， and Smad2/3 （P<0.05）， and reduced protein expression levels of E-Cadherin and Smad7 （P<0.05）. Compared with the TGF-β1 group， the TGF-β1 + QGS group and the TGF-β1 + SB431542 group displayed decreased protein expression levels of vimentin， p-Smad2/3， and Smad2/3 （P<0.05）， and increased protein expression levels of E-Cadherin and Smad7 （P<0.05）. ConclusionThe ethyl acetate extract of QGS inhibits the epithelial-mesenchymal transition （EMT） of TE-1 cells through the TGF-β1 pathway to reduce the migration and invasion of TE-1 cells.
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Liver fibrosis is a wound healing response that occurs in the setting of chronic liver injury and is caused by imbalance in the synthesis and degradation of extracellular matrix （ECM）. If left untreated， it can progress to liver cirrhosis and hepatocellular carcinoma. The activation of hepatic stellate cell （HSC） is now well established as a central driver of liver fibrosis. The activated HSC will transform into myofibroblasts that produce ECM protein. Transforming growth factor-β1 （TGF-β1） can induce the activation of hepatic stellate cell （HSC）， and TGF-β1/Smads signaling pathway is one of the important pathways to promote liver fibrosis. Non-coding RNA （ncRNA） does not encode proteins during the transcription but plays an important regulatory role in the post-transcriptional process of genes. Accumulating evidence shows that the occurrence of liver fibrosis is closely related to the abnormal expression of ncRNA which participates in the activation of HSC by regulating TGF-β1 signal transduction and then affects the process of liver fibrosis. MiRNA-mediated TGF-β1/Smads signaling pathway can not only promote liver fibrosis but also play a role in anti-fibrosis. Long non-coding RNA （lncRNA） not only promotes the development of liver fibrosis by binding to target genes but also enhances TGF-β1 signal transduction by acting as competitive endogenous RNA. circular RNA （circRNA） acts as a ''sponge'' to regulate TGF-β1/Smads pathway， thereby inhibiting HSC activation and exerting the anti-liver fibrosis effect. Chinese medicinal plays an essential part in the prevention and treatment of liver fibrosis， and the active components can inhibit TGF-β1/Smads pathway by regulating the expression of miRNA， thus alleviating liver fibrosis. This article reviews the role and mechanism of miRNA-， lncRNA- and circRNA-mediated TGF-β1/Smads signaling pathway in liver fibrosis and summarizes the anti-liver fibrosis effect of active components of Chinese medicinals by regulating miRNA-mediated TGF-β1/Smads signaling pathway， which can serve as a reference for clinical treatment of liver fibrosis and the development of new drugs.
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Background Radiation-induced liver damage is a major complication for primary liver cancer and other upper abdominal tumors during radiation therapy. The early biological effects of radiation-induced liver damage at different doses of radiation and its mechanisms of action have not yet been elucidated. Objective To establish X-ray-induced radioactive mouse liver damage model and explore the level of oxidative stress and its correlation with nuclear factor-κB (NF-κB) and transforming growth factor-β1 (TGF-β1). Methods A total of 24 male C57BL/6J mice aged 6 weeks were randomly divided into 4 groups (control, 0.8 Gy, 1.6 Gy, and 4 Gy), with 6 mice in each group. X-rays irradiated the whole body of mice singly in each dose group. At 24 h after radiation, histopathological changes in mouse liver were evaluated; peripheral blood cell count, serum aspartate aminotransferase (AST) and alanine aminotransferase (ALT) levels, as well as liver tissue superoxide dismutase (SOD) activity, malondialdehyde (MDA) level, reduced glutathione (GSH) level, and 8-hydroxy-2′-deoxyguanosine (8-OHdG) level were measured; real-time fluorescence quantitative PCR was used to detect liver tissue NF-κB p65 and TGF-β1 mRNA expression levels; the correlations of oxidative stress indicators with NF-κB p65 and TGF-β1 mRNA expression levels were analyzed by Pearson correlation. Results Compared with the control group, at 24 h after different doses of X-ray radiation, early injury-related histopathological changes were observed in liver, and the serum levels of AST and ALT were significantly increased in the 4 Gy group (P<0.05); the numbers of peripheral blood leukocytes and lymphocytes were decreased in the radiation exposure groups (P<0.05), showing a decreasing trend with increasing radiation doses; the levels of liver oxidative stress indicators (MDA, SOD, and GSH) in exposed mice were significantly increased (P<0.05), showing an increasing trend with increasing radiation doses. The liver 8-OHdG were significantly increased in the 1.6 Gy and 4 Gy groups compared with the control and the 0.8 Gy groups, respectively (P<0.05). The NF-κB p65 and TGF-β1 mRNA expression levels in the liver of mice were significantly increased in the 1.6 Gy and 4 Gy groups compared with the control group (P<0.05). The TGF-β1 mRNA expression level also exhibited an increasing trend with increasing radiation doses. The results of correlation analysis showed that the levels of MDA, SOD, GSH, and 8-OHdG in liver tissues were significantly and positively correlated with the expression levels of NF-κB p65 and TGF-β1 mRNA (P<0.05). Conclusion X-rays of various doses can affect the degree of liver injury, peripheral blood cell count, serum levels of AST and ALT, and liver oxidative stress levels in mice. The level of oxidative stress induced by X-ray is positively correlated with NF-κB and TGF-β1 in liver tissues, and it may participate in the process of radiation-induced liver injury.
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ObjectiveTraditional Chinese medicine， namely Dahuang Zhechongwan （DHZCW） was used to treat myocardial fibrosis in model rats， observe its effect on myocardial fibrosis in rats， and explore its action mechanism. MethodThirty-six SPF male Kunming rats were divided into blank group， model group， low-， medium-， high-dose groups of DHZCW （0.056， 0.084， 0.168 g·kg-1）， captopril group （10 mg·kg-1）， with six rats in each group. Except for the blank group， the other groups were intraperitoneally injected isoproterenol solution of 5 mg·kg-1 for 15 consecutive days to replicate the myocardial fibrosis model. At the beginning of modeling， the rats in each group took drugs， and they were sacrificed 28 days after administration. Serum and heart tissue were collected for the corresponding detection. Hematoxylin-eosin （HE） staining and Masson staining were used to observe tissue inflammation， cellular degeneration， necrosis， and fibrosis. The contents of hydroxyproline （HYP）， tumor necrosis factor-α （TNF-α）， interleukin-1β （IL-1β）， interleukin-6 （IL-6）， hyaluronic acid （HA）， laminin （LN）， type-Ⅲ procollagen （PC Ⅲ） in serum of rats and rats were determined by enzyme-related immunosorbent assay （ELISA）. The expression levels of key pathway proteins transforming growth factor-β1 （TGF-β1）， α-smooth muscle actin （α-SMA）， Smad2， Smad3， and Smad7 were detected by Western blot. The expression levels of key pathway genes TGF-β1， α-SMA， Smad2， Smad3， Smad7， miR-29a-5p， miR-29b-2-5p， and miR-29c-5p were detected by Real-time quantitative polymerase chain reaction （Real-time PCR）. ResultCompared with the blank group， the pathological changes of fibrosis in the model group were obvious， the contents of serum HYP， TNF-α， IL-1β， IL-6， HA， LN， and PCⅢ were increased （P<0.01）， the protein expression levels of TGF-β1， α-SMA， Smad2， and Smad3 were increased； the protein expression level of Smad7 was decreased （P<0.01）. The mRNA expression levels of TGF-β1， α-SMA， Smad2， and Smad3 were increased （P<0.05， P<0.01）， while those of Smad7， miR-29a-5p， miR-29b-2-5p， and miR-29c-5p were decreased （P<0.01）. Compared with the model group， after 28 days of administration， serum HYP， TNF-α， IL-1β， IL-6， HA， LN， and PCⅢ in high-， medium-， and low-dose groups of DHZCW and captopril groups were decreased （P<0.01）. Except for the low-dose group， the protein contents of TGF-β1， α-SMA， Smad2， and Smad3 were decreased， while the protein content of Smad7 was increased （P<0.01）. The mRNA expression levels of TGF-β1， Smad2， α-SMA， and Smad3 in high-dose group of DHZCW were decreased （P<0.05，P<0.01）， while those of Smad7， miR-29a-5p， miR-29b-2-5p， and miR-29c-5p were increased （P<0.05）. The mRNA expressions of TGF-β1， Smad2， and Smad3 in the medium-dose group of DHZCW were decreased （P<0.05， P<0.01）， while mRNA expression of Smad7 was increased （P<0.01）. The mRNA levels of TGF-β1 and Smad2 in the low-dose group of DHZCW were decreased （P<0.01）. ConclusionDHZCW can improve myocardial fibrosis in rats， and its action mechanism may be related to the regulation of the TGF-β1/Smads/miR-29 pathway. In addition， there is dose dependence in the range of 0.056-0.168 g·kg-1， and the effect of the high-dose group is more stable.
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OBJECTIVE@#To study effects of Shenmai Injection on hypertensive heart failure and its mechanism for inhibiting myocardial fibrosis.@*METHODS@#Salt-sensitive (Dahl/SS) rats were fed with normal diet (0.3% NaCl) and the high-salt diet (8% NaCl) to observe the changes in blood pressure and heart function, as the control group and the model group. Salt-insensitive rats (SS-13BN) were fed with the high-salt diet (8% NaCl) as the negative control group. After modeling, the model rats were randomly divided into heart failure (HF) group, Shenmai Injection (SMI) group and pirfenidone (PFD) group by a random number table, with 6 rats in each group. They were given sterilized water, SMI and pirfenidone, respectively. Blood pressure, cardiac function, fibrosis and related molecular expression were detected by sphygmomanometer, echocardiogram, enzyme linked immunosorbent assay (ELISA), hematoxylin-eosin staining, Masson staining, immunofluorescence and qPCR analysis.@*RESULTS@#After high-salt feeding, compared with the control and negative control group, in the model group the blood pressure increased significantly, the left ventricular ejection fraction (LVEF) and left ventricular fraction shortening (LVFS) were significantly reduced, and the serum NT-proBNP concentration increased significantly (all P<0.05); furthermore, the arrangement of myocardial cells was disordered, the edema was severe, and the degree of myocardial fibrosis was also significantly increased (P<0.05); the protein and mRNA expressions of collagen type I (Col I) were up-regulated (P<0.05), and the mRNA expressions of transforming growth factor β 1 (TGF- β 1), Smad2 and Smad3 were significantly up-regulated (P<0.05). Compared with HF group, after intervention of Shenmai Injection, LVEF and LVFS increased, myocardial morphology was improved, collagen volume fraction decreased significantly (P<0.05), and the mRNA expressions of Col I, TGF- β 1, Smad2 and Smad3, as well as Col I protein expression, were all significantly down-regulated (all P<0.05).@*CONCLUSION@#Myocardial fibrosis is the main pathological manifestation of hypertensive heart failure, and Shenmai Injection could inhibit myocardial fibrosis and effectively improve heart failure by regulating TGF-β 1/Smad signaling pathway.
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Rats , Animaux , Débit systolique , Chlorure de sodium , Rats de lignée Dahl , Fonction ventriculaire gauche , Défaillance cardiaque , Facteur de croissance transformant bêta-1/métabolisme , Hypertension artérielle , Fibrose , ARN messagerRésumé
Objective To observe the effect of acupuncture on lung tissue of asthma model rats ofα-smooth muscle actin(α-SMA),fibronectin(FN)expression levels.Methods A total of 40 male SPF Sprague-Dawley(SD)rats were randomly divided into normal control group,model group,drug group and acupuncture group,with 10 rats in each group.On the 1st and 8th days of the experiment,the normal control group was intraperitoneally injected with 1 mL of 0.9％ sodium chloride solution,and the model group was intraperitoneally injected with 1 mL of 10％ compound ovalbumin solution to sensitize.On the 15th day of the experiment,the normal control group was nebulized with 0.9％ sodium chloride solution for 20 minutes,and the model group was nebulized with 1％ ovalbumin solution for 20 minutes to stimulate asthma.After successful modeling,the normal control group and the model group were not treated,and the drug group was intraperitoneally injected with 0.05％ dexamethasone sodium phosphate solution,once a day,for 10 days.In the acupuncture group,Feishu,Dazhui and Fengmen acupoints were punctured once every 2 days for 7 times.The mRNA expression of signal transducer and activator of transcription 6(STAT6),the protein and positive expression of transforming growth factor-β1(TGF-β1),and the levels ofα-SMA,FN and peripheral blood T lymphocyte populations(CD3+,CD4+,CD8+)in the lung tissues of the four groups were compared.Results Compared with the normal control group,STAT6 mRNA expression,TGF-β1 protein and positive expression,the positive expression ofα-SMA,FN and T lymphocyte populations(CD3+,CD8+)in peripheral blood in model group were significantly increased[STAT6 mRNA(2-ΔΔCt):13.12±2.20 vs.1.02±0.20,TGF-β1 protein expression(A value):0.10±0.01 vs.0.06±0.01,TGF-β1 positive expression(A value):0.11±0.01 vs.0.08±0.01,α-SMA positive expression(A value):19.65±1.37 vs.7.74±0.81,FN positive expression(A value):18.40±0.79 vs.6.50±0.60,CD3+:0.70±0.03 vs.0.59±0.02,CD8+:0.39±0.02 vs.0.20±0.02,all P<0.05],and CD4+in model group was significantly decreased(0.32±0.02 vs.0.39±0.03,P<0.05);STAT6 mRNA expression and TGF-β1 protein expression,the positive expression ofα-SMA and FN and T lymphocyte populations(CD3+,CD8+)in peripheral blood in the drug group and acupuncture group were significantly lower than those in the model group,CD4+in the drug group and acupuncture group was significantly higher than that in the model group,and the changes in the acupuncture group was more significant than those in the drug group[STAT6 mRNA(2-ΔΔCt):3.01±0.55 vs.5.64±0.65,TGF-β1 protein expression(A value):0.06±0.01 vs.0.09±0.01,TGF-β1 positive expression(A value):0.08±0.01 vs.0.09±0.01,α-SMA positive expression(A value):12.33±0.50 vs.14.99±0.53,FN positive expression(A value):9.91±0.61 vs.13.19±0.66,CD3+:0.60±0.03 vs.0.65±0.04,CD4+:0.39±0.02 vs.0.36±0.02,CD8+:0.21±0.04 vs.0.28±0.03,all P<0.05].Conclusion For asthma model rats,acupuncture at Feishu,Dazhui and Fengmen acupoints can significantly stimulate the nerves and muscles of lung tissue,promote blood circulation in the lung,enhance lung function,improve the health status of lung tissue,reduce the content of the positive expression ofα-SMA and FN,and improve airway remodeling.
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Objective:To investigate the role of transforming growth factor β1 (TGF-β1) and matrix metalloproteinase (MMP)-2 in pancreatic tissue repair and reconstruction in rats with acute pancreatitis and its potential mechanism.Methods:114 male SD rats were randomly divided into normal control group (CON group) and acute edematous pancreatitis model group (AEP group), acute necrotic pancreatitis model group (ANP group), ANP control group and ANP intervention group. The rat AEP model was constructed by subcutaneous injection of caerulein, and the rat ANP model was prepared by intraperitoneal injection of L-arginine. The ANP intervention group and ANP control group were prepared by intraperitoneal injection of TGF-β1 inhibitor SB431542 or DMSO 30 min before, 24 h and 48 h after pancreatitis induction, respectively. Hydroxyproline content in pancreatic tissue was determined by hydroxyproline kit. The expression of TGF-β1, phosphorylated Smad3 (p-Smad3), type Ⅲ collagen and MMP-2 in pancreatic tissue was detected by immunohistochemical method. The activity of MMP-2 was determined by gelatin enzyme spectrometry. The expression levels of MMP-2 and p-Smad3 proteins in pancreatic tissue were detected by Western blot.Results:The hydroxyproline content in CON group was (61.71±8.56)μg/mg protein. The hydroxyproline content in AEP group reached the peak (116.72±8.53)μg/mg on the 3rd day. The peak value of hydroxyproline content in ANP group was (174.93±11.75)μg/mg on day 5. The peak value in ANP group was significantly higher than that in AEP group, and the peak value of hydroxyproline content in AEP group was significantly higher than that in CON group. The hydroxyproline content at day 3, 5 and 7 in the ANP intervention group was (108.07±10.48)μg/mg, (137.14±8.66)μg/mg and (112.35±13.16)μg/mg, respectively, and that at day 3, 5 and 7 in the ANP control group was (132.35±14.2)μg/mg, (175.43±13.75)μg/mg and (137.92±12.65)μg/mg, respectively. TGF-β1 immunohistochemical peak score in control group, AEP group and ANP group was (0.12±0.03), (1.96±0.21) and (3.00±0.28), respectively. p-Smad3 immunohistochemical peak score was (0.15±0.05), (2.05±0.20), and (3.05±0.24), while type Ⅲ collagen immunohistochemical peak score was (0.11±0.04), (1.56±0.15), and (3.10±0.17). MMP-2 immunohistochemical peak score was (0.05±0.03), (1.45±0.20), and (2.45±0.15), respectively. The immunohistochemical peak scores of TGF-β1, p-Smad3, type Ⅲ collagen and MMP-2 in ANP group were significantly higher than those in AEP group. The immunohistochemical peak scores of TGF-β1, p-Smad3, type Ⅲ collagen and MMP-2 in pancreatic tissue of ANP intervention group and ANP control group were (2.36±0.21), (2.25±0.22), (2.47±0.19), (2.00±0.10) and (3.02±0.21), (3.01±0.19), (3.05±0.24), (2.43±0.11), respectively, which in ANP intervention group was significantly lower than those in the ANP control group. The peak value of MMP-2 activity in pancreatic tissue of CON group, AEP group and ANP group was (10.85±1.73), (85.78±7.16) and (115.43±8.7), respectively, which in ANP group was significantly higher than that in AEP group, and in AEP group was significantly higher than that in CON group. In ANP intervention group and ANP control group 3 and 5 days after molding, the expression levels of MMP-2 protein in pancreas were 0.20±0.01, 1.19±0.02, 0.52±0.01, 1.54±0.05, respectively; p-Smad3 protein expression levels were 0.30±0.04, 0.66±0.11, 1.95±0.05, 1.30±0.01, respectively; and MMP-2 and p-Smad3 in ANP intervention group was significantly lower than those the ANP control group. All the differences among the groups above were statistically significant (all P value <0.001). Conclusions:TGF-β1 and MMP-2 play an important role in tissue remodeling and extracellular matrix deposition after acute pancreatitis inflammation.
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OBJECTIVE@#To investigate the effect of intramedullary nail fixation (IMN) and minimally invasive percutaneous plate internal fixation (MIPPO) techniques on tibiofibular fractures and their effect on platelet activation and serum transforming growth factor-β1 (TGF-β1) and bone morphogenetic protein-2 (BMP-2).@*METHODS@#Total of 105 patients with tibiofibular fractures from February 2019 to February 2020 were selected and divided into 53 cases in the MIPPO group and 52 cases in the IMN group. There were 29 males and 24 females with an average age of (41.74±6.05) years old in MIPPO group;in IMN group, 31 males and 21 females with an average age of (40.59±5.26) years old. The perioperative surgical indexes, postoperative complications, ankle function recovery at 12 months postoperatively, platelet activation indexes at 3 and 7 days preoperatively and postoperatively, and serum TGF-β1 and BMP-2 levels at 4 and 8 weeks preoperatively and postoperatively were compared between the two groups.@*RESULTS@#The operating time and fracture healing time in the MIPPO group were shorter than those in the IMN group(P<0.05); Compared with the preoperative period, the levels of GMP-140, PAC-1, CD63, and CD61 increased in both groups at 3 and 7 days after surgery, but were lower in the MIPPO group than in the IMN group(P<0.05);the levels of serum TGF-β1 and BMP-2 increased in both groups at 4 and 8 weeks after surgery compared with the preoperative period, and the postoperative complication rate in the MIPPO group was lower than that in the IMN group(P<0.05);the difference was not statistically significant in the excellent rate of ankle function recovery at 12 months follow-up after surgery between two groups(P>0.05).@*CONCLUSION@#Both intramedullary nail fixation and MIPO technique for treatment of tibia and fibula fractures can improve ankle joint function, but the latter has the advantages of short operation time, fast fracture healing, fewer complications, and light platelet activation. Serum TGF-β1, BMP-2 level improves quickly.
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Mâle , Femelle , Humains , Adulte , Adulte d'âge moyen , Tibia/traumatismes , Facteur de croissance transformant bêta-1 , Ostéosynthese intramedullaire/méthodes , Fractures du tibia/chirurgie , Ostéosynthèse interne/méthodes , Plaques orthopédiques , Consolidation de fracture , Complications postopératoires , Fractures multiples , Résultat thérapeutique , Protéines morphogénétiques osseuses , Interventions chirurgicales mini-invasives/méthodes , Études rétrospectivesRésumé
OBJECTIVE@#To explore the effect of leucine-rich α-2-glycoprotein (LRG1) derived from hepatocytes on activation of hepatic M1 Kupffer cells.@*METHODS@#A metabolic dysfunction-associated fatty liver disease (MAFLD) model was established in BALB/c mice by high-fat diet (HFD) feeding for 16 weeks. Oleic acid was used to induce steatosis in primary cultures of mouse hepatocytes. The mRNA and protein expressions of LRG1 in mouse liver tissues and hepatocytes were detected by real-time PCR and Western blotting. Primary hepatic macrophages were stimulated with the conditioned medium (CM) from steatotic hepatocyte along with LRG1 or transforming growth factor-β1 (TGF-β1), or both for 24 h, and the expression levels of inducible nitric oxide synthase (iNOS) was detected with Western botting, and the mRNA expressions of iNOS, chemokine ligand 1 (CXCL-1) and interleukin-1β (IL-1β) were measured by RT-PCR. The MAFLD mice were injected with LRG1 (n=6), TGF-β1 (n=6), or both (n=6) through the caudal vein, and the live tissues were collected for HE staining and immumohistochemical detection of F4/80 expression; the mRNA expressions of iNOS, CXCL-1 and IL-1β in liver tissues were detected using RT-PCR.@*RESULTS@#The mRNA and protein expression levels of LRG1 were significantly downregulated in the liver tissues of MAFLD mice and steatotic hepatocytes (P < 0.05). Treatment of the hepatic macrophages with CM from steatosis hepatocytes significantly enhanced the mRNA expression levels of iNOS, CXCL-1 and IL-1β, and these changes were significantly inhibited by the combined treatment with TGF-β1 and LRG1 (P < 0.05). In MAFLD mice, injections with either LRG1 or TGF-β1 alone reduced hepatic lipid deposition and intrahepatic macrophage infiltration, and these effects were significantly enhanced by their combined treatment, which also more strongly inhibited the mRNA expression levels of iNOS, CXCL-1 and IL-1β (P < 0.05).@*CONCLUSION@#LRG1 inhibits hepatic macrophage infiltration by enhancing TGF-β1 signaling to alleviate fatty liver inflammation in MAFLD mice.