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Objective To explore the mechanism of Wumei pill on ulcerative colitis(UC)in mice based on the anti oxidative stress pathway of nuclear factor erythroid 2-related factor 2(Nrf2)/antioxidant response element(ARE).Methods Seventy SPF male C57BL/6 mice were randomly divided into the control group,the UC group,the mesalazine group(MES group,0.82 g/kg MES),the low dose Wumei pill group(WMW-L group,5 g/kg crude drug),the middle dose Wumei pill group(WMW-M group,10 g/kg crude drug),the high dose Wumei pill group(WMW-H group,20 g/kg crude drug)and the high dose Wumei pills+Nrf2 inhibitor ML-385 group(WMW-H+ML-385 group,Wumei pills crude drug 20 g/kg+20 mg/kg ML-385),with 10 rats in each group.The disease activity index(DAI)score and colonic mucosa injury score were performed in mice after the last administration.Pathological changes of colonic mucosa in mice were observed by HE staining.The levels of interleukin(IL)-1β,tumor necrosis factor-α(TNF-α)and IL-6 in serum and colon tissue of mice were measured by enzyme-linked immunosorbent assay(ELISA).The content of malondialdehyde(MDA)in serum and colon tissue of mice was determined by thiobarbituric acid colorimetry(TBA).The activity of superoxide dismutase(SOD)in serum and colon tissue of mice was measured by xanthine oxidase method.The activity of glutathione peroxidase(GSH-px)in serum and colon tissue of mice was determined by direct method with dithiodinitrobenzoic acid(DTNB).The positive expression of Nrf2 in colon tissue of mice was observed by immunohistochemistry.The expression of heme oxygenase-1(HO-1)and NAD(P)H:quinone oxidoreductase-1(NQO1)proteins in colon tissue of mice were detected by Western blot assay.Results Compared with the control group,the DAI score,colonic mucosa injury score,colonic histopathology score,levels of IL-1β,TNF-α,IL-6 and MDA in serum and colonic tissue,and expression levels of Nrf2,HO-1 and NQO1 protein in colonic tissue of mice were increased in the UC group,levels of SOD and GSH-px in serum and colon tissue decreased(P＜0.05),the colon mucosa of mice was seriously damaged.Compared with the UC group,changes of corresponding indexes were contrary to the above in the MES group,the WMW-M group and the WMW-H group.However,the expression levels of Nrf2,HO-1 and NQO1 proteins in colon tissue were increased(P＜0.05),and the damage of colon mucosa in mice was alleviated.Changes of the above indexes were dose-dependent in the WMW-L group,the WMW-M group and the WMW-H group.There were no significant differences in the above indexes between the WMW-H group and the MES group.ML-385 attenuated the improvement effect of high dose Wumei pill on colon mucosa injury.Conclusion Wumei pill may alleviate the colon mucosal damage of UC mice by activating Nrf2/ARE antioxidant stress pathway.
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Lymphoedema of lower extremities,chronic and progressive,will severely deteriorate the quality of life of patients as it progresses.Thus,early diagnosis and treatment to delay the progress of the disease is conducive to improving the prognosis of patients.At present,common techniques for the diagnosis of lower limb lymphedema,whose advantages and disadvantages vary,cannot be applied to individual case comprehensively.CEUS has the advantages of non-invasion,convenience,real-time,and good repeatability for this disease.CEUS can enhance the image of lymph in lymphatics,and has a high sensitivity to superficial lymphatics,gradually applied in lymphedema of lower limbs.This article reviews the application of CEUS in lower limb lymphedema.
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Nowadays,the application of ultrasound is not only used in clinical imaging,but also extended in the study of drug delivery.Diagnostic ultrasound combined with microbubbles can effectively open the biological barriers,which can enhance the targeted delivery of drugs and be beneficial to the combination of ultrasound and disease treatment.This review summarizes the biological effects of ultrasound,the characteristics of ultrasound microbubbles and the potential ability that solving the biological barrier problems in cancer therapy by using ultrasound targeted microbubble destruction,hoping to provide some reference for the further development of therapeutic ultrasound as a safe and effective drug targeted delivery strategy.
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Autoantibody-related congenital heart block (ACHB) is a passively acquired autoimmune disease developing in fetuses after exposuring to maternal anti-Ro/Sj?gren's syndrome type A (SSA) antibody and/or anti-La/SSB antibody transported across the placenta, which contributes to fetal heart conduction system damage and signal conduction block at the atrioventricular node. However, fetal atrioventricular block does not necessarily occur with the presence of maternal autoantibodies, indicating its complex pathogenesis. This review focuses on the theories of calcium channels and apoptosis, the influence of other maternal factors and environmental changes on ACHB and the roles of natural killer cells and human leukocyte antigen in ACHB, aiming to provide reference for further study on the pathogenesis.
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The understanding of heart embryonic development and structure can contribute to improve our leaning of the etiology, pathophysiology and classification of congenital heart disease in humans, which has become the focus of echocardiography teaching. Meanwhile the difficulties and problems formed because of its diverse and fragmented theoretical knowledge. "Hand as foot" teaching method is a kind of teaching method using intuitive body language combined with the thought of analogy, so as to make teaching content relatively simplistic and figurative. Our study has demonstrated this method can be used in a constructive way to improve course content and delivery for echocardiography teaching to assess patent foramen ovale for standardized residency training of cardiac ultrasound, and achieved a good teaching effect. The specific implementation approaches and effect of this method are described in detail. This paper also explores the potential feasibility and benefits of the application of using "Hand as foot" teaching method in echocardiography teaching.
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Objective:To observe the feasibility of evaluating right ventricular (RV) function by the method based on left ventricle (LV) pressure-strain ring (PSL) technique in patients with systemic lupus erythematosus (SLE), and to evaluate the efficacy of non-invasive PSL in the diagnosis of dysfunction of both LV and RV.Methods:Thirty-nine patients were enrolled with SLE who were admitted to the Affiliated Hospital of Inner Mongolia Medical University from March 2020 to September 2021 and 57 sex- and age-matched healthy controls underwent assessment by conventional echocardiography, two-dimensional speckle tracking imaging (2D-STI) and myocardial work (MW). The echocardiographic parameters were compared between the groups. The correlations between RVMW parameters and conventional echocardiographic parameters, and between MW parameters and SLEDAI-2K score were analyzed by Spearman correlation analysis.Results:①The two groups did not show any difference at the conventional echocardiographic parameters of the LV systolic function ( P>0.05). In the SLE group, tricuspid regurgitation maximal velocity (TR V max) and right ventricular index of myocardial performance (RIMP) increased, tricuspid annular plane systolic excursion (TAPSE) and tricuspid annular S′ (S′ tv) decreased (all P<0.05), and others did not show statistical difference (all P>0.05). ②The 2D-STI parameters: There were no significant differences in left ventricular global longitudinal strain (LV GLS) ( P>0.05), however RVGLS decreased ( P<0.05). ③The MW parameters of LV and RV: including global constructive work (GCW), global work index (GWI), global wasted work (GWW), and global work efficiency (GWE). In SLE group, LV GWE, RV GWE decreased and LV GWW, RV GWW increased ( P<0.05), others were no significant differences ( P>0.05). ④The correlation analysis: RV GWI positively correlated with TR V max ( rs=0.481). RV GCW positively correlated with TR V max ( rs=0.587). RV GWW positively correlated with right atrial area (RAA) and TR V max ( rs=0.429, 0.610), negatively correlated with S′ tv ( rs=-0.342). RV GWE positively correlated with S′ tv ( rs=0.326) and negatively correlated with RAA ( rs=-0.462) (all P<0.05). SLEDAI-2K score was negatively correlated with LV GLS ( rs=-0.333) and LV GWI ( rs=-0.326) ( P<0.05). Conclusions:The study has shown the impaired systolic function of both LV and RV in patients with SLE. PSL technique, especially RVMV based on LV PSL technique might emerged as a novel measure to evaluate systolic dysfunction in SLE patients.
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Objective:To evaluate the application value of left ventricular pressure-strain loop (PSL) in patients with rheumatoid arthritis (RA) by the PSL.Methods:From April 2020 to June 2021, 75 RA patients(case group) and 35 healthy physical examination person(control group) were selected from the Affiliated Hospital of Inner Mongolia Medical University.According to the disease activity scores 28(DAS28) joint disease range of activity score, the patients were divided into low range of activity group (16 cases), medium range of activity group (35 cases) and high range of activity group (24 cases). Echocardiographic examinations were performed on all patients, conventional ultrasound data were collected and the left ventricular PSL technology was used to analyze the myocardial work parameters, including global work index (GWI), global constructive work (GCW), global waste work (GWW) and global work efficiency (GWE). The mean values of myocardial work index (MWI), constructive work (CW), waste work (WW) and work efficiency (WE) were calculated. The differences of myocardial work parameters between the case groups and the control group were compared, and the correlation analysis of myocardial work parameters with global longitudinal strain of left ventricle(LVGLS), left ventricular ejection fraction(LVEF) and DAS28 scores were conducted.Results:①There were no statistically significant differences of clinical data between each case group and the control group (all P>0.05). ②Compared with the control group and low disease activity group, the LVGLS of medium and high disease activity groups decreased obviously (all P<0.05). ③The GWI and GCW of the medium and high disease activity groups were significantly lower than those of the control group (all P<0.05), and there were no statistically significant differences of GWW and GWE between the case groups and the control group (all P>0.05). The mid-segment MWI, apical MWI and CW of the medium and high disease activity case groups, and the mid-segment CW of the medium disease activity case group were lower than those of the control group (all P<0.05). ④In the case group, GWI, GCW and LVEF were significantly and positively correlated ( rs1=0.253, P=0.008; rs2=0.261, P=0.024), and were significantly negatively correlated with LVGLS ( rs1=-0.525, P<0.001; rs2=0.455, P<0.001). There were no significant correlations between myocardial work parameters and DAS28 score (all P>0.05). Conclusions:PSL can early reflect to the impaired cardiac function of RA patients with moderate and high disease activity, and provide a new imaging method for clinical evaluation of the cardiac function of patients.
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Objective:To evaluate the cardiac function and systolic dyssynchrony of fetuses exposed to maternal autoimmune antibodies (anti-SSA/Ro60, anti-SSA/Ro52 and anti-SSB/La) by using two-dimensional speckle tracking imaging (2D-STI).Methods:A total of 52 pregnant women with singleton pregnancy in the Affiliated Hospital of Inner Mongolia Medical University from July 2018 to November 2020 were selected. Eighteen fetuses of mothers with autoimmune antibodies were enrolled as autoimmune disease (AD) group and 34 fetuses of healthy mothers without antibodies were included as control group. Maternal baseline characteristics, fetoplacental Doppler parameters, and conventional echocardiographic data of two groups were prospectively collected. The systolic global and regional longitudinal strain of left and right ventricles (LV and RV) and the time to peak strain of regional myocardium were measured using 2D-STI. The differences in time to peak strain between the LV free wall and RV free wall (two-chamber dyssynchrony, 2C-DYS) and between the septum and LV free wall (one-chamber dyssynchrony, 1C-DYS) were also calculated.Results:There were no significant differences between the two groups in conventional systolic and diastolic functional parameters for the LV and RV(all P>0.05). The myocardial deformation parameters and 2C-DYS obtained by 2D-STI showed no statistical differences between two groups(all P>0.05). However, 1C-DYS was significantly more prolonged in the AD group than control group[28.50(13.50, 39.25)ms vs 19.50(8.00, 29.25)ms, P=0.042]. Conclusions:LV systolic mechanical dyssynchrony in fetuses of mothers with autoimmune antibodies suggests in-utero subclinical damage of the cardiac conduction system.
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Objective To evaluate the left ventricular and right ventricular systolic function by two‐dimensional speckle tracking echocardiography ( 2D‐STE) in patients with rheumatoid arthritis ( RA ) . Methods Fifty five patients with RA and 50 healthy subjects were received echocardiography . 2D‐STE were applied for all the subjects to obtain left ventricular global longitudinal strain ( LVGLS) and right ventricular global longitudinal strain ( RVGLS) .Tricuspid annular plane systolic excursion ( TAPSE) and the change ratio of right ventricular area ( RVACR) were measured by echocardiography . The anti‐cyclic citrullinated peptide antibodies ( anti‐CCP‐II) ,rheumatoid factor ( RF) ,C‐reactive protein ( CRP) and erythrocyte sedimentation rate ( ESR) were detected in both group . The LVGLS and RVGLS in RA group were used to conduce correlation analysis with the level of anti‐CCP‐II ,RF ,CRP , ESR and the duration of disease . Results There was a significant decrease in RVGLS and LVGLS in RA group compared with control group( P 0 .05) . The anti‐CCP‐II ,RF ,CRP and ESR in RA group increased significantly compared with control group ( P < 0 .001 ) . The result of correlation analysis showed there was no correlation between RVGLS ,LVGLS and anti‐CCP‐II ,RF ,CRP ,ESR in RA group . However ,RVGLS and LVGLS were negatively correlated with the duration of disease . Conclusions LVGLS and RVGLS in RA patients were lower than those in healthy people ,strain decreases with the extension of disease duration ,2D‐STE may be an efficacious assessment to assess left ventricular and right ventricular systolic function in patients w ith RA .
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Objective To detect the atherosclerotic progression in low density lipoprotein receptor (LDL-R) gene knock-out mouse by ultrasound biomicroscopy(UBM) technique,and to monitor the intima media thickness (IMT) and changes in plague of aortic wall.Methods 10 male LDL-R gene knock-out mice of 16 weeks age and 10 LDL-R gene knock-out mice of 24 weeks age were in the experimental group,and 10 male C57BL/6 mice of 16 and 24 weeks age were in the control group.The shapes of their aortic roots,ascending aorta,aortic arch and CCA were detected by UBM,and the IMT at aortic root view and carotid artery bifurcation were measured,then the data were compared with histopathology of the corresponding vascular segments.Results The difference between the IMT of aortic root and carotid artery bifurcation of the 16 week old LDL-R mice and the control group of the same age had no statistical significance.The difference between the IMT of carotid artery bifurcation of the 24-week-old LDL R mice and the control group of the same age had no statistical significance.The IMT of aortic root thickened compared with control group of the same age(P ＜0.01).Conclusions The UBM technique can be used to detect the atherosclerotic progression in LDL-R gene knock-out mouse.