Effect of glucagon-like peptide-1 on hypoxia-reoxygenation induced injury in neonatal rat cardiomyocytes / 中华心血管病杂志

<p><b>OBJECTIVE</b>To observe the effect of glucagon-like peptide-1 (GLP-1) on hypoxia-reoxygenation (H/R) induced injury in neonatal rat cardiomyocytes.</p><p><b>METHODS</b>Cultured neonatal rat cardiomyocytes were randomly divided into seven groups: normal control group, H/R group, GLP-1 + H/R group, GLP-1 + H/R + UO126 group, GLP-1 + H/R + LY294002 group, H/R + UO126 group, H/R + LY294002 group. LDH activity, apoptosis rate of cardiomyocytes, Caspase-3 activity were detected.</p><p><b>RESULTS</b>Compared with normal control group, the activity of LDH, cardiomyocyte apoptosis rate, Caspase-3 activity were all significantly increased in H/R group (all P < 0.01). However, compared with H/R group, these changes were significantly attenuated in GLP-1 + H/R group [the activity of LDH (128.47 +/- 7.96) U/L vs. (223.96 +/- 22.10) U/L, P < 0.01, and cardiomyocyte apoptosis rate (2.84 +/- 2.56)% vs. (12.58 +/- 6.69)%, P < 0.01, and Caspase-3 activity (36,809 +/- 4750) RLU vs. (57,602 +/- 9161) RLU, P < 0.01], while LY294002 (PI3K inhibitor) and UO126 (MAPK inhibitor) could block the effects of GLP-1 in cardiomyocytes underwent H/R injury.</p><p><b>CONCLUSIONS</b>GLP-1 could protect H/R injury mainly by inhibiting cardiomyocytes apoptosis via activating PI3K/Akt and MAPK signaling pathway.</p>

Effects and mechanism of glucagon-like peptide-1 on injury of rats cardiomyocytes induced by hypoxia-reoxygenation / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Although the insulinotropic role of glucagon-like peptide-1 (GLP-1) in type 2 diabetes mellitus has been substantiated, its role in cardioprotection remains largely unknown. This study aimed to determine the effects of GLP-1 on injury of rats cardiac myocytes induced by hypoxia-reoxygenation (H/R) and the possible mechanisms.</p><p><b>METHODS</b>The cultured neonatal rats cardiac myocytes were randomly divided into seven groups: the normal control group, the H/R group, the GLP-1 + H/R group, the GLP-1 + H/R + UO126 (the p42/44 mitogen-activated protein kinase (MAPK) inhibitor) group, the GLP-1 + H/R + LY294002 (phosphatidylinositol 3-kinase (PI3K) inhibitor) group, the H/R + UO126 group, and the H/R + LY294002 group. The lactate dehydrogenase (LDH) activity, apoptosis rate of cardiac myocytes, and caspase-3 activity were detected after the injury of H/R.</p><p><b>RESULTS</b>Compared with the normal control group, the activity of LDH, cardiac myocyte apoptosis rate, and caspase-3 activity all increased significantly in the H/R group (P < 0.01). Compared with the H/R group, these three indices all decreased in the H/R + GLP-1 group (P < 0.01). However, the changes of LDH activity, apoptosis rate, and caspase-3 activity were inhibited by LY294002 and UO126 respectively.</p><p><b>CONCLUSIONS</b>GLP-1 can directly act on cardiac myocytes and protect them from H/R injury mainly by inhibiting their apoptosis. Its mechanism may be through the PI3K-Akt pathway and the MAPK signaling pathway.</p>

Effects of injection of Huangqi injectio into Zusanli (ST 36) on immune function in the patient of schizophrenia / 中国针灸

<p><b>OBJECTIVE</b>To study on effects of injection of Huangqi Injectio into Zusanli (ST 36) on the hospital infection and immune function in the patient of schizophrenia.</p><p><b>METHODS</b>Thirty inpatients of chronic schizophrenia were treated with injection of Huangqi Injectio into bilateral Zusanli (ST 36), 2 mL each point, thrice each week, for 8 weeks. Relative immune indexes and the hospital infection were investigated.</p><p><b>RESULTS</b>The hospital infection and the sub-infection were 4 cases (13.3%), 7 cases-times (23.3%) in the injection group; and 9 cases (15.0%), 19 cases-times (31.7%) in the control group, respectively, with no significant difference between the two groups (P>0.05). The drug-administration duration was 7.77 days/case and 11.87 days/case in the two groups, respectively (P<0.01). In the injection group, as compared with that of last 3 years the duration was 7.77 days/case and 14.08 days/case (P<0.01). IgG, IgA, IgM and T-cell subgroups did not have significant changes, but there was the most different value before and after injection in SIL-2R of the no-infection group, and the longer the drug administration duration, the smaller the different values.</p><p><b>CONCLUSION</b>Injection of Huangqi Injectio into Zusanli (ST 36) has definite effect for prevention of the hospital infection in inpatients of chronic schizophrenia, and SIL-2R is a valuable index for investigation of the hospital of infection.</p>