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Objective@#To investigate the effects CXCL1 derived from TAMs on the progression of HCC by CXCL1 in tumor microenvironment (TME) .@*Methods @#PMA induced human monocyte (THP-1) to obtain undifferentiated macrophages (M0) and then co-cultured with Huh 7 HCC cells.The biomarkers of macrophage phenotype and mRNA level of HCC were analysed by qRT-PCR. Colony formation assay,cell viability assay and transwell assay were performed to evaluate the biological alteration of HCC cells in TME.Epithelial-mesenchymal transition (EMT) molecular genetics were detected using western blot.The levels of CXCL1 in TME were measured by ELISA assay. @*Results @#High CXCL1 expression in HCC patients predicted poor prognosis.Abundant macrophages were found in CXCL1 high expression HCC tissues.In macrophages and HCC co-cultured model,significantly increasing CXCL1 expression was detected in both two cells and the biomarkers of M2 macrophages,CD163 and CD206 were elevated.The growth and migration of HCC cells were promoted.@*Conclusion @#Co-culture of macrophages with HCC cells induces macrophages pro-tumor phenotype and CXCL1 secretion which promotes the progression of HCC.
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To explore the suitable fertilizing pattern for Saposhnikovia divaricata in the genuine producing area, a field trial was carried out to investigate the changes in the yield and quality of medicinal materials and soil in different fertilization patterns, such as organic fertilizer substitution(organic fertilizer+NPK fertilizer) and chemical fertilizer reduction(organic fertilizer+NPK fertilizer decrement and organic fertilizer+NPK fertilizer decrement+soil conditioner). The comprehensive analysis of all treatments was based on the medicine quality evaluation data set and soil quality evaluation data set, respectively, by CRITIC weight method. The results showed that(1) the yield of S. divaricate increased by 4.93%-12.67% under the organic fertilizer substitution mode, and the yield increased by 44.43% under the treatment of chemical fertilizer reduction YHT15, which was higher than that of the organic fertilizer substitution mode.(2) The quality of S. divaricate under the two fertilization modes was superior to the standard in the Chinese Pharmacopoeia, and the application of biochar was helpful to improve the quality of S. divaricate quality, with an increase of 82.83%-181.54%. CRITIC method analysis showed that fertilization treatments with high comprehensive scores were YHT15, YH30, and YH15.(3) Soil quality under the two fertilization modes was higher than that under the control. The fertilization treatments with higher comprehensive scores of soil quality were YHT15, YHT30, and YHT. The fertilization mode of adding biochar as soil conditioner, applying an appropriate amount of organic fertilizer, and reducing part of chemical fertilizer is the appropriate way to develop ecological plantation of S. divaricata in the Baicheng area in the western Jilin province. The specific fertilization mode is as follows. The basic fertilizer was 361 kg·hm~(-2) superphosphate+110 kg·hm~(-2) potassium sulfate+82 kg·hm~(-2) organic fertilizer+10 000 kg·hm~(-2) rice husk biochar, and urea was applied as top fertilizer three times, 29, 29, and 20 kg·hm~(-2), respectively.
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Agriculture , Fertilizers/analysis , Soil , Apiaceae , Nitrogen/analysisABSTRACT
To study the chemical constituents and their biological activities in the rhizomes of Curcuma phaeocaulis, silica gel column chromatography, reverse medium pressure liquid chromatography, preparative thin layer chromatography, and semi-preparative high performance liquid chromatography were used for isolation and purification and modern spectroscopic methods were used to determine the structure of the isolated compound. Moreover, the effect of the compound on the proliferation of HUVECs was determined by the MTT assay. A new elemane-type sesquiterpenoid glycoside was isolated from the n-butanol soluble fraction of 95% ethanolic extract of the rhizomes of Curcuma phaeocaulis. Its structure was identified as (1Z)-2-hydroxy-curzerenone 2-O-β-D-glucoside. It showed no inhibitory effect on the proliferation of HUVECs.
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AIM: To analyze the correlation between SLC52A2 and uveal melanoma(UM)based on the cancer genome atlas(TCGA)database, and preliminarily explore the influence of SLC52A2 on the prognosis of UM patients and potential mechanism.METHODS: The clinical information on 80 patients with UM and mRNA expression data of SLC52A2 were collected from TCGA database. According to the expression level of SLC52A2, 80 patients were divided into high and low expression groups by median method. The relationship between the expression of SLC52A2 and clinical pathological features, as well as the prognosis was analyzed. The age, sex, clinical stage, pathological stage, and mRNA expression of SLC52A2 were analyzed by univariate and multivariate Cox analysis to search the prognostic factors of UM. Enrichment analyses were used to predict the possible regulatory pathway of SLC52A2 in UM.RESULTS: The survival prognosis of patients with low expression of SLC52A2 was better than that of patients with high expression of SLC52A2(P<0.05). The level of SLC52A2 has no significant correlation with the age, sex, clinical stage, and pathological stage of patients in both groups(P>0.05). Multivariate Cox analysis showed that the high expression of SLC52A2 was a risk factor for poor prognosis. The nomogram prediction model developed by combining the expression of SLC52A2 with clinical pathological features could accurately predict the survival probability of UM patients. The infiltration abundance of Th2 and Treg cells in both groups has difference(all P<0.001). GSEA analysis showed that the gene of JAK-STAT(FDR=0.028, P=0.004)and PI3K/AKT(FDR=0.017, P=0.002)were rich in samples with high expression of SLC52A2.CONCLUSION: The high expression of SLC52A2 is a risk factor for the prognosis of UM patients. SLC52A2 can be used as a biomarker to predict the prognosis and to become a new target for the treatment of patients with UM.
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OBJECTIVES@#To investigate the role of brain functional connectivity and nonlinear dynamic analysis in brain function assessment for infants with controlled infantile spasm (IS).@*METHODS@#A retrospective analysis was performed on 14 children with controlled IS (IS group) who were admitted to the Department of Neurology, Anhui Provincial Children's Hospital, from January 2019 to January 2023. Twelve healthy children, matched for sex and age, were enrolled as the control group. Electroencephalogram (EEG) data were analyzed for both groups to compare the features of brain network, and nonlinear dynamic indicators were calculated, including approximate entropy, sample entropy, permutation entropy, and permutation Lempel-Ziv complexity.@*RESULTS@#Brain functional connectivity showed that compared with the control group, the IS group had an increase in the strength of functional connectivity, and there was a significant difference between the two groups in the connection strength between the Fp2 and F8 channels (P<0.05). The network stability analysis showed that the IS group had a significantly higher network stability than the control group at different time windows (P<0.05). The nonlinear dynamic analysis showed that compared with the control group, the IS group had a significantly lower sample entropy of Fz electrode (P<0.05).@*CONCLUSIONS@#Abnormalities in brain network and sample entropy may be observed in some children with controlled IS, and it is suggested that quantitative EEG analysis parameters can serve as neurological biomarkers for evaluating brain function in children with IS.
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Child , Humans , Infant , Nonlinear Dynamics , Spasms, Infantile , Retrospective Studies , Brain , ElectroencephalographyABSTRACT
Sepsis is a life-threatening organ dysfunction caused by dysregulated host responses to infection. Despite significant advances in anti-infective, immunomodulatory, and organ function support technologies, the precise and targeted management of sepsis remains a challenge due to its high heterogeneity. Studies have identified disturbed tryptophan (TRP) metabolism as a common mechanism in multiple diseases, which is involved in both immune regulation and the development of multi-organ damages. The rise of research on intestinal microflora has further highlighted the critical role of microflora-regulated TRP metabolism in pathogen-host interactions and the "cross-talk" among multi-organs, making it a potential key target for precision medicine in sepsis. This article reviews TRP metabolism, the regulation of TRP metabolism by the intestinal microflora, and the characteristics of TRP metabolism in sepsis, providing clues for further clinical targeting of TRP metabolism for precision medicine in sepsis.
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Humans , Gastrointestinal Microbiome/physiology , Tryptophan/metabolism , Precision Medicine , SepsisABSTRACT
Objective:To investigate the effects of total-body PET/CT imaging with short acquisition time on image quality and lesion detectability in lungs and parenchymal organs.Methods:Sixty patients (31 males, 29 females, age (61.1±11.8) years) with pulmonary nodules (PN) and 53 patients (29 males, 24 females, age (56.7±17.2) years) with parenchymal organ lesions (POL) who underwent total-body PET/CT imaging in the First Affiliated Hospital of Shandong First Medical University between October 2021 and April 2022 were retrospectively analyzed. The acquisition time with PET was 600 s, and the reconstructed images were divided into 6 groups based on different duration (30, 60, 120, 180, 300 and 600 s), namely G30, G60, G120, G180, G300 and G600 groups. The subjective analysis was carried out with the 5-point Likert scale in 3 aspects: the overall impression of image quality, noise, and lesion conspicuity. The objective analysis indicators included the SUV mean of the mediastinal blood pool (MBP); the SUV mean, standard deviation (SD) and signal-to-noise ratio (SNR) of the liver; SUV max and target-to-background ratio (TBR) of the lesions. Differences of the indicators among 6 groups were analyzed by Friedman test with Bonferroni correction. G600 served as the reference for the other 5 groups to test their lesion detectability. Results:The subjective image quality of different groups for PN and that of G120, G180, G300 groups for POL could meet the needs of clinical diagnosis in terms of the overall image quality, noise, and lesion conspicuity (all scores>3). There was no significant difference in the SUV mean of MBP among different time groups (median for PN: 1.52-1.56, median for POL: 1.35-1.47; χ2 values: 10.23, 11.02, both P>0.05). Difference was not found in SUV mean of the liver either (median for PN: 2.51-2.56, median for POL: 2.33-2.40; χ2 values: 8.35, 8.93, both P>0.05). The liver SD significantly increased along with the shortened acquisition time ( χ2 values: 400.99, 400.00, both P<0.001; z values: from -16.90 to -3.15, all P<0.003). The SNR significantly decreased along with the shortened acquisition time ( χ2 values: 397.32, 400.00, both P<0.001; z values: 2.98-16.90, all P<0.003). The SUV max (median for PN: 3.55-4.01, median for POL: 5.77-6.08; χ2 values: 8.58, 3.02, both P>0.05) and TBR (median for PN: 2.42-2.81, median for POL: 2.36-2.45; χ2 values: 9.83, 3.69, both P>0.05) of lesion were not significantly different among 6 groups. Taking G600 group as a reference, the lesion detection rates were 100% in G30 group and other 4 groups for PN (81/81) and in G120, G180, G300 groups for POL (80/80). Conclusion:Total-body PET/CT imaging with acquisition time of 30 s for lungs and that with acquisition time of 120 s for parenchymal organs are feasible for clinical use, with the PET image quality and lesion detectability maintained.
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OBJECTIVES@#To study the value of autotaxin (an autocrine motility factor) level in serum and bronchoalveolar lavage fluid (BALF) in predicting refractory Mycoplasma pneumoniae pneumonia (RMPP) in children and its correlation with interleukin-6 (IL-6), interleukin-8 (IL-8), and C-reactive protein (CRP).@*METHODS@#A retrospective analysis was performed on 238 children with Mycoplasma pneumoniae pneumonia who were admitted from January 2019 to December 2021. According to disease severity, they were divided into two groups: RMPP (n=82) and general Mycoplasma pneumoniae pneumonia (GMPP; n=156). The two groups were compared in terms of the levels of autotaxin, IL-6, IL-8, and CRP in serum and BALF to study the value of autotaxin level in serum and BALF in predicting RMPP in children, as well as the correlation of autotaxin level with IL-6, IL-8, and CRP in children with RMPP.@*RESULTS@#Compared with the GMPP group, the RMPP group had significantly higher levels of autotaxin, IL-6, IL-8, and CRP in serum and BALF (P<0.05). For the children with RMPP, the levels of autotaxin, IL-6, IL-8, and CRP in serum and BALF in the acute stage were significantly higher than those in the convalescent stage (P<0.05). The receiver operating characteristic (ROC) curve showed that the level of autotaxin in serum and BALF had a good value in predicting RMPP in children, with an area under the curve of 0.874 (95%CI: 0.816-0.935) and 0.862 (95%CI: 0.802-0.924), respectively. The correlation analysis showed that the level of autotaxin in serum and BALF was positively correlated with IL-6, IL-8, and CRP levels (P<0.001).@*CONCLUSIONS@#The level of autotaxin in serum and BALF increases and is correlated with the degree of disease recovery and inflammatory cytokines in children with RMPP. Autotaxin can be used as a predictive indicator for RMPP in children.
Subject(s)
Child , Humans , C-Reactive Protein , Cytokines , Interleukin-6 , Interleukin-8 , Mycoplasma pneumoniae , Pneumonia, Mycoplasma/diagnosis , Retrospective StudiesABSTRACT
ObjectiveTo observe the effects of Sinisan on behaviors and NOD-like receptor protein 3 (NLRP3) inflammasomes of depressed rats induced by chronic unpredictable mild stress (CUMS) and further explore the anti-depressant mechanism of Sinisan. MethodFifty male rats were randomly divided into a normal group, a model group, an NLRP3 inhibitor (MCC950) group (10 mg·kg-1), and low- (2.5 g·kg-1) and high-dose (5 g·kg-1) Sinisan groups, with 10 rats in each group. The depression model was induced by 42 d CUMS in rats except for those in the normal group. Drug intervention was performed on the 22nd day of modeling by gavage in the Sinisan groups and by intraperitoneal injection in the MCC950 group. Except for the MCC950 group, the remaining four groups received 10 mg·kg-1 physiological saline by intraperitoneal injection, while the rats in the model group, the normal group, and the MCC950 group were administered with 3 mL of physiological saline by gavage. Twenty-one days later, the sucrose preference test and open field test were performed. Western blot was used to detect the protein expression of NLRP3, apoptosis-associated speck-like protein containing a CARD (ASC), cysteinyl aspartate-specific protease-1 (Caspase-1), B-cell lymphoma-2 (Bcl-2), Bcl-2 associated X protein (Bax), ionized calcium-binding adapter molecule 1 (Iba1), and CD68 in the hippocampus of rats in each group. Enzyme-linked immunosorbent assay (ELISA) was used to detect the levels of interleukin-1β (IL-1β) and interleukin-18 (IL-18) in the hippocampus of rats. Nissl staining and TUNEL were used to assess the pathological changes and apoptosis level in the hippocampal CA1 region of rats, respectively. ResultThe sucrose preference rate and consumption volume in the sucrose preference test, the total distance, the percentage of central movement distance, and the percentage of residence time in the open field test of rats in the model group were lower than those in the normal group (P<0.01). Compared with the model group, the Sinisan groups and the MCC950 group showed improved depression-like behaviors, apoptosis level in the hippocampal CA1 region, and neuron loss to varying degrees. Sinisan could reduce the levels of IL-1β, IL-18, Bax, Iba1, and CD68 in the hippocampus (P<0.05, P<0.01), increase the level of Bcl-2 (P<0.05, P<0.01), and inhibit the protein expression of NLRP3, ASC, and Caspase-1 related to NLRP3 inflammasomes (P<0.05, P<0.01). ConclusionSinisan can improve the depression-like behaviors and pathological damage of hippocampal neurons in CUMS-induced rats, and the mechanism may be related to the inflammatory response mediated by the NLRP3 inflammasome signaling pathway.
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Based on ITS sequences, the molecular identification of Cordyceps cicadae and Tolypocladium dujiaolongae was carried out, and high-performance liquid chromatography(HPLC) fingerprint combined with chemical pattern recognition method was established to differentiate C. cicadae from its adulterant T. dujiaolongae. The genomic DNA from 10 batches of C. cicadae and five batches of T. dujiaolongae was extracted, and ITS sequences were amplified by PCR and sequenced. The stable differential sites of these two species were compared and the phylogenetic tree was constructed via MEGA 7.0. HPLC was used to establish the fingerprints of C. cicadae and T. dujiaolongae, and similarity evaluation, cluster analysis(CA), principal component analysis(PCA), and partial least squares discriminant analysis(PLS-DA) were applied to investigate the chemical pattern recognition. The result showed that the sources of these two species were different, and there were 115 stable differential sites in ITS sequences of C. cicadae and T. dujiao-longae. The phylogenetic tree could distinguish them effectively. HPLC fingerprints of 18 batches of C. cicadae and 5 batches of T. dujiaolongae were established. The results of CA, PCA, and PLS-DA were consistent, which could distinguish them well, indicating that there were great differences in chemical components between C. cicadae and T. dujiaolongae. The results of PLS-DA showed that six components such as uridine, guanosine, adenosine, and N~6-(2-hydroxyethyl) adenosine were the main differential markers of the two species. ITS sequences and HPLC fingerprint combined with the chemical pattern recognition method can serve as the identification and differentiation methods for C. cicadae and T. dujiaolongae.
Subject(s)
Chromatography, High Pressure Liquid/methods , Cordyceps/genetics , Hypocreales , PhylogenyABSTRACT
Alternating hemiplegia of childhood is a rare neurodevelopmental disorder. Most cases are reported as sporadic disorder due to
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Objective:To investigate the effects and mechanisms of curcumin on insulin resistance in streptozocin-induced diabetic rats.Methods:Diabetic rats were induced by intraperitoneal injection of STZ, then all the rats were randomly divided into diabetes (DM), diabetes+ curcumin (DM+ Cur), and diabetes + buffer control (DM+ NC) groups. Normal SD rats were used as control group (NC). The DM+ Cur group was treated with curcumin, while the DM+ NC group was treated with equal-volume buffer. The test lasted 12 weeks. The blood glucose was detected, and hyperinsulinemic-euglycemic clamp test was performed to estimate peripheral insulin resistance. At the end of the experiments, rats were killed and the total protein and cell membrane protein were extracted from skeletal muscle. The levels of phosphorylated PI3K, phosphorylated AKT, total PI3K, and total AKT were measured by Western blot. The levels of total GLUT4 and GLUT4 of cell membrane were also detected by Western blot, GLUT4 levels in skeletal muscle cell membranes were detected by immunofluorescence.Results:Blood glucose levels of DM+ Cur group were lower than those of DM group [(18.67±1.99 vs 24.38±2.88) mmol/L, P<0.05], and insulin resistance was also improved[the average GIR(14.69±0.29 vs 10.25±0.30) mg·kg -1·min -1, P<0.01]. The phosphorylation levels of PI3K and AKT were increased, and GLUT4 translocation to the cell membrane was increased. Conclusion:By activating the PI3K/AKT pathway, curcumin promotes GLUT4 translocation, increases skeletal muscle glucose uptake, and finally improves insulin resistance.
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Objective:To explore the mechanism of Bushen Huoxue prescription in regulating the related factors in phosphatidylinositol 3-kinase (PI3K)/ protein kinase B (Akt)/ mammalian target of rapamycin (mTOR) pathway and improving ovarian reserve function of rats with diminished ovarian reserve (DOR). Method:Sixty DOR model rats were duplicated by Ataya method (intraperitoneal injection of cyclophosphamide) and then randomized into the model group, estradiol valerate (0.000 9 g·kg<sup>-1</sup>) group, and high- (33 g·kg<sup>-1</sup>), middle- (16.5 g·kg<sup>-1</sup>) and low-dose (8.25 g·kg<sup>-1</sup>) Bushen Huoxue prescription groups, with 12 rats in each group. Another 12 healthy rats were classified into the blank control group. The rats in each group were given the corresponding drugs by gavage, while those in the blank control group and model group received the same volume of normal saline, once per day, for 14 successive days. After treatment, the ovarian tissue was stained with hematoxylin-eosin (HE) for observing the changes in quantities of primary follicles, mature follicles, and total follicles under a light microscope, followed by the detection of vascular endothelial growth factor (VEGF) expression in the ovarian tissue by immunohistochemistry. The protein expression levels of PI3K, Akt, mTOR, and cysteine-dependent aspartate-directed protease-3 (Caspase-3) in the ovarian tissue were assayed by Western blot, whereas the mRNA expression levels of PI3K, Akt, and mTOR were measured by Real-time polymerase chain reaction (Real-time PCR). Result:As revealed by comparison with the blank control group, the quantities of mature follicles and total follicles in the ovarian tissue of model group were significantly reduced (<italic>P</italic><0.05, <italic>P</italic><0.01). The protein expression levels of VEGF and Caspase-3 in the ovarian tissue were increased (<italic>P</italic><0.05), while the protein and mRNA expression levels of PI3K, Akt, and mTOR were decreased (<italic>P</italic><0.05, <italic>P</italic><0.01). Compared with the model group, Bushen Huoxue prescription at the high and middle doses elevated the quantities of mature follicles and total follicles to varying degrees (<italic>P</italic><0.05, <italic>P</italic><0.01), and VEGF increased most significantly in the middle-dose Bushen Huoxue prescription group (<italic>P</italic><0.05). Caspase-3 in the low-, middle-, and high-dose Bushen Huoxue prescription groups and the western medicine group declined. The protein and mRNA expression levels of PI3K, Akt, and mTOR were up-regulated in the middle- and high-dose Bushen Huoxue prescription groups (<italic>P</italic><0.05, <italic>P</italic><0.01), and the levels in the middle-dose Bushen Huoxue prescription group were closer to those in the blank control group. Conclusion:Bushen Huoxue prescription effectively improves the ovarian reserve function of rats with DOR and increases the number of follicles possibly by up-regulating VEGF expression in the ovarian tissue, activating the PI3K/Akt/mTOR signaling pathway, and regulating the content of Caspase-3.
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ABSTRACT Background: Enriched environment (EE) is a simple and effective intervention to improve cognitive function in post-stroke cognitive impairment (PSCI), partly due to the rebalancing of the cholinergic signaling pathway in the hippocampus. α7-nicotinic acetylcholine receptor (α7-nAChR) is a cholinergic receptor whose activation inhibits inflammation and promotes the recovery of neurological function in PSCI patients. However, it is still unclear whether EE can regulate α7-nAChR and activate the cholinergic anti-inflammatory pathway (CAP) in PSCI. Objective: To investigate the effects of EE on cognitive impairment, and the role of α7-nAChR in PSCI. Methods: A PSCI rat model was induced by middle cerebral artery occlusion and reperfusion (MCAO/R) and were reared in standard environment (SE) or EE for 28d, control group with sham surgery. Cognitive function was determined by Morris water maze test. The long-term potentiation (LTP) was assessed by Electrophysiology. Histopathological methods were used to determine infarct volume, α7-nAChR expression and the cytokines and cholinergic proteins expression. Results: Compared with SE group, rats in EE group had better cognitive function, higher expression of α7-nAChR positive neurons in hippocampal CA1 region. In addition, EE attenuated unfavorable changes induced by MCAO/R in cytokines and cholinergic proteins, and also enhanced LTP promoted by nicotine and attenuated by α-BGT; but showed no significantly difference in infarct volume. Conclusions: EE markedly improves cognitive impairment and enhances neuroplasticity in PSCI rats, which may be closely related to enhancement of α7-nAChR expression.
RESUMO Introdução: O ambiente enriquecido (AE) é uma intervenção simples e eficaz para melhorar a função cognitiva no comprometimento cognitivo pós-AVC, em parte devido ao reequilíbrio da via de sinalização colinérgica no hipocampo. O receptor nicotínico α7 de acetilcolina (α7-nAChR) é um receptor colinérgico cuja ativação inibe inflamação e promove a recuperação da função neurológica em pacientes com comprometimento cognitivo pós-AVC. No entanto, ainda não está claro se o AE pode regular α7-nAChR e ativar a via anti-inflamatória colinérgica (VAC) em comprometimento cognitivo pós-AVC. Objetivo: Investigar os efeitos do AE no comprometimento cognitivo e o papel do α7-nAChR no comprometimento cognitivo pós-AVC. Métodos: Modelo de comprometimento cognitivo pós-AVC foi induzido em ratos por oclusão e reperfusão da artéria cerebral média (MCAO/R), que foram criados em ambiente padrão (AP) ou em AE por 28d; grupo controle com cirurgia simulada. A função cognitiva foi determinada pelo teste do labirinto aquático de Morris. A potenciação de longo prazo (PLP) foi avaliada por eletrofisiologia. Métodos histopatológicos foram usados para determinar o volume do infarto, a expressão de α7-nAChR e a expressão de citocinas e proteínas colinérgicas. Resultados: Em comparação com o grupo AP, os ratos do grupo AE tiveram melhor função cognitiva, com maior expressão de neurônios positivos para α7-nAChR na região CA1 do hipocampo. Além disso, o AE atenuou alterações desfavoráveis induzidas por MCAO/R em citocinas e proteínas colinérgicas, e também aumentou a PLP promovida pela nicotina e atenuada por α-BGT, mas não mostrou nenhuma diferença significativa no volume do infarto. Conclusão: O AE melhora acentuadamente o comprometimento cognitivo e aumenta a neuroplasticidade em ratos com comprometimento cognitivo pós-AVC, o que pode estar intimamente relacionado ao aumento da expressão de α7-nAChR.
Subject(s)
Humans , Animals , Rats , Stroke , Cognitive Dysfunction , Long-Term Potentiation/physiology , Environment , alpha7 Nicotinic Acetylcholine Receptor/physiology , alpha7 Nicotinic Acetylcholine Receptor/chemistryABSTRACT
Cerebral ischemia-reperfusion(I/R) injury is an important cause of acute ischemic stroke. Timely elimination of damaged proteins and organelles by regulating autophagy during cerebral ischemia-reperfusion plays an important role in relieving brain damage. In order to investigate whether β-caryophyllene(BCP) could protect neurons from cerebral I/R injury by regulating auto-phagy, C57 BL/6 J male mice were randomly divided into sham operation group, model group, and drug-administered group. After intra-gastric administration was given for 5 days, the middle cerebral artery occlusion(MCAO) model was established by suture method. Twenty four hours after surgery, the infarct volume and neurological function were assessed; the pathological changes of cortical tissue were observed by HE staining; Western blot was used to detect the expression of autophagy-related proteins beclin1, p62, LC3 B and apoptosis-related protein Bcl-2; immunofluorescence was used to observe the expression of LC3 B in the ischemic cortex. The autophagy of cortical tissue in the ischemic area was observed by transmission electron microscopy. The experimental results showed that as compared with the model group, the BCP pretreatment significantly reduced the neurological deficit, decreased the percentage of cerebral infarction volume, reduced the death of brain tissue cells in the ischemic area, up-regulated the expression of beclin1, LC3 B and Bcl-2 protein, down-regulated p62 protein expression, and significantly increased the number of autophagosomes in the cortical tissue of the ischemic area. It was finally determined that BCP could protect neurons from cerebral ischemia-reperfusion injury by activating autophagy.
Subject(s)
Animals , Male , Mice , Autophagy , Brain Ischemia/drug therapy , Infarction, Middle Cerebral Artery , Mice, Inbred C57BL , Polycyclic Sesquiterpenes/therapeutic use , Random Allocation , Reperfusion Injury/drug therapyABSTRACT
Objective In order to meet the needs of maxillofacical bone defect repair, the aim of this study was to synthesize graphene oxide(GO) modified three-dimensional conneted nano- zirconia(ZrO2) bone tissue engineering scaffold and evaluate its surface morphology, compressive strength and cytocompatibility. Methods GO was synthesized by a modified Hummers method and then was testified by scanning electron microscope, transmission electron microscopy and fourier transform infrared spectroscopy. ZrO2 scaffold was modified by different concentrations(0.5,1.0,1.5mg/mL) of GO dispersion via a silane-mediated method. The composite scaffold with uniform GO coating was chosen for compressive strength test and co-cultured with human dental pulp stem cells(hDPSCs). Actin staining was used to observe the growth of the cells on the scaffold, and MTS was used to detect the cell activity. Results The characterization results showed that, under scanning electron microscope, the GO was flaky and the surface morphology of folds could be seen. Part of the GO layer folds up at the edge. Under transmission electron microscopy, the GO was clearly observed to have a gossylike, translucent and slightly wrinkled lamellar structure. The crystal structure in this area in the high-resolution filter image showed a six-member ring structure like graphite. Under high power electron microscope, the 1.0mg/ml GO-ZrO2 scaffold could be seen to deposit a thin layer of GO at the crack of the scaffold skeleton, connecting the two ends of the crack, and lamellar GO with folds could be observed on the surface of ceramic particles. The comparison of mechanical properties showed that the compression strength of GO-ZrO2 scaffold was sgnificantly increased compared with that of ZrO2 scaffold[(1.292±0.087)vs(1.031±0.076), P<0.05]. Compared with the simple ZrO2 scaffold, the GO-ZrO2 scaffold showed more dense extension and adhesion to the surface of scaffolds, showing more active cell proliferation. The cell viability test showed that the viability of hDPSCs was significantly improved on GO-ZrO2 scaffold after 1, 3 and 5 days of proliferation compared with the simple ZrO2 scaffold(P<0.05). Conclusion The ZrO2 scaffold modified by GO improved compressive strength, promoted the early proliferation of hDPSCs with good cytocompatibility.
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Objective To improve the system of specialized training by exploring the role of multimodal navigation in the teaching of neurosurgery.Methods The questionnaire was conducted by the experts to obtain the detailed information of 20 residents.They were randomly divided into two groups:the traditional teaching group (n=10) and the multimodal navigation group (n=10).The details were evaluated from the reaction layer,the learning layer,the behavior layer and the result layer by the Kirkpatriek's model.The data were analyzed by SPSS 17.0.The quantitative data were described by mean ± standard deviation and the qualitative data was described by rate or percentage.Two independent-samples t test was used to compare the results of two groups.Results The results of the reaction layer showed that the scores of the multimodal navigation group were significantly higher than those of the traditional teaching group,which were statistically significant (P<0.05) in the training content,training methods,training facilities and experience after training.The learning results showed that the multimodal navigation group had higher scores in the theoretical examinations,surgical skills and overall scores (P<0.05).The behavioral results showed that the clinical ability of the multimodal navigation group was more prominent (P<0.05).The result layer showed that under the guidance of professors,the percentage of residents who can complete the whole surgical operation is higher in multimodal navigation group (50% vs.20%).Conclusion The application of multimodal navigation technology has a positive effect on the teaching of neurosurgery and specialized training of residents.
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At present,Western medicine is widely used in the treatment of epilepsy.However,about 30%-40% of epileptic patients are resistant to them and are affected by the side effects of these drugs.Traditional Chinese medicine is effective in treating epileptic seizures and relieving complications caused by Western medicine.However,the active ingredients and mechanisms of traditional Chinese medicine remain unclear.This article reviews and summarizes the advances and mechanisms in treating epilepsy,such as Chinese medicine monomer,the extracts of single Chinese medicine and Chinese medicine compound.Chinese medicine monomers,including gastrodin,asarone,rhynchophylline,ligustrazine,tanshinone ⅡA,curcumin,etc.,have antiepileptic effects via regulating excitatory neurotransmitters and receptors,the expression of inflammatory factors,sodium/potassium ion channels and the expression of apoptotic protein,therefore protecting neurons.The extracts of single Chinese herbal including the extracts of Gastrodiae Rhizoma,Acori Tatarinowii Rhizoma,Ginseng Radix et Rhizoma,Ganoderma,Scutellariae Radix and Ginkgo Folium,etc.,have antiepileptic effects related to the inhibition of γ-aminobutyric acid receptor,upregulation of phosphatidylinositol 3-kinase signaling pathway and reduction of glutamate-induced excitotoxicity and oxidative stress response.Furthermore,these extracts can regulate ion channels and reduce oxidative damage of neurons.Chinese medicine compounds including Dianxian Qing Granules,Danxing Ningxian Granules,Huoxue Dingxian formulae,etc.,can improve the therapeutic effect on epilepsy through simultaneously regulating excitatory transmitters,apoptosis factors and cytokines.
Subject(s)
Humans , Drugs, Chinese Herbal , Therapeutic Uses , Epilepsy , Drug Therapy , Medicine, Chinese Traditional , PhytotherapyABSTRACT
Panax japonicus is a traditional Chinese medicine,and its principle components have shown certain pharmacological activities for cell damage,aging and cell apoptosis. In order to clarify the pharmacological mechanism and involved metabolic pathways of P. japonicas,the gene expression of Tetrahymena thermophila under P. japonicus treatment was analyzed through high-throughput transcriptome sequencing in this study. Based on the transcriptome analysis,3 544 differentially expressed genes were identified in control group,of which 1 945 genes showed up-regulated expression and 1 599 genes showed down-regulated expression. Under P. japonicas treatment in the experiment group,3 312 differentially expressed genes were screened,of which 1 `493 genes showed up-regulated expression and 1 819 genes showed down-regulated expression. GO enrichment analysis indicated that in control group,the genes in the cells in a series of fundamental biological process were down-regulated,such as DNA replication and protein synthesis; while the signal transduction process and fatty acids oxidizing process were enriched. Whereas in the experiment group,down-regulated genes were mainly enriched in oxidation-reduction,cofactor metabolic process and vitamin metabolic process; up-regulated genes were enriched in signal transduction process and protein modification process. In the analysis using KEGG database,cell cycle pathway was enhanced and autophagy pathway was inhibited under the condition of P. japonicas treatment. Real-time quantitative polymerase chain reaction( RT-qPCR) was used to detect the expression differences between 6 up-regulated and 4 down-regulated genes in related metabolic pathways. The RT-q PCR results and RNA-Seq data were highly correlated and consistent with each other. This study could provide important direction and basis for further study on the mechanism of cell growth regulation with the treatment of P. japonica.
Subject(s)
Gene Expression , Gene Expression Profiling , Metabolic Networks and Pathways , Panax , Chemistry , Plants, Medicinal , Chemistry , Tetrahymena thermophila , Genetics , TranscriptomeABSTRACT
Objective:To observe the effect of addition and subtraction therapy of Guyinjian on oocyte quality, pregnancy outcome and ovarian reserve function in patients with poor ovarian response (POR) with kidney Yin deficiency syndrome. Method:Ninety patients were randomly divided into control group (45 cases) and observation group (45 cases) by random number table. The patients in both groups got antagonist. Based on such treatment, the patients in observation received additional addition and subtraction therapy of Guyinjian. The using time and amount of gonadotropin (Gn), ovum taking cycle, cycle canceling rate, fertilization rate, available embryo rate, quality embryo rate, ovulation cycle clinical pregnancy rate were recorded. Levels of follicle stimulating hormone (FSH), luteinizing hormone (LH), serum estradiol (E2) and endometrial thickness, anti mullerian hormone (AMH), resistance index (RI), pulsation index (PI), end diastolic velocity (EDV) and peak systolic velocity (PSV) were detected. Ratio of PSV/EDV (S/D) was calculated, and scores of kidney yin deficiency syndrome were graded before and after treatment. Result:Total amount of Gn in observation group was less than that in control group (PP2 were higher than those in control group (PPPχ2=5.124, Pχ2=5.767, PPPPPConclusion:Addition and subtraction therapy of Guyinjian can increase ovarian blood supply, improve high ovarian reserve function, reduce Gn consumption, increase number of acquired eggs, alleviate symptoms of kidney yin deficiency, and can ameliorate ovarian responsiveness and pregnancy outcome.