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Objective To observe the influence of tea pigment on myocardial contractility,electrocardiogram(ECG) and heart rate in exsomatized toads under the condition of myocardialischemia.Methods Sixty toads were divided into the normal exsomatized toad heart group(A) and myocardial ischemia toad heart(B).Then the group A was re-divided into the Ringer's solution group (A1),tea pigment low dose(200 mg/L) group(A2) and the high dose(400 mg/L) group(A3);the group B was re-divided into the pituitrin model group(B1),pituitrin + tea pigment low dose(200 mg/L) group(B2) and high dose(400 mg/L) group(B3).The BL-420S biological function experiment system was used to record the myocardial contractile force and ECG change curve of exsomatized toad.Results Compared with the group A1,the myocardial contractility in the group A3 was obviously increased(P＜0.05),the difference in the group A2 had no statistical significance(P＞0.05);the QRS peak value of ECG and heart rate had no statistically significant difference(P＞0.05);compared with the group A1,the myocardial contractility,ECG QRS peak value and heart rate in the group B1 were significantly decreased(P＜0.05);compared with the group B1,the myocardial contractility,ECG QRS peak value and heart rate in the group B2 and B3 were significantly increased(P＜0.05).Conclusion Tea pigment can obviously improve the decrease of the exsomatized toad cardiac activity caused by myocardial ischemia.
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Objective To study the effect of moutan cortex extract on Th17 cells of systemic lupus erythematosus (SLE) patients, so as to provide reference for clinical practice.Methods A total of 168 SLE patients admitted to our hospital from March 2012 to August 2013 were selected as subjects, andrandomized into the observation group and control group.84 patients in observation group received moutan cortex extract treatment and 84 patients in control group received conventional medical treatment.The Th17 and Th1 cell percentage of two groups before and after treatment were compared, and the incidence of adverse reactions were observed.Results All the indicators before treatment showed no statistically significant differences between two groups.After treatment, the Th17 cell percentage of observation group decreased to (0.27 ±0.15)%, and the Th1 cell percentage increased to (2.53 ± 1.72)%, showing more significant changes than control group (P<0.05).The reduction of IL-6 level, SLEDAI score and ESR after treatment were more significant in observation group than in control group(P<0.05).The incidence of adverse reactions was lower in observation group than in control group ( P <0.05 ) .Conclusion Moutan cortex extract can effectively improve the condition of SLE through reducing the Th17 cell percentage and increasing Th1 cell percentage with less adverse reactions.
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AIM To observe the expression of inducible nitric ox ide synthase (iNOS) in the rats' hippocampus of kainic acid (KA) induced-seizur es and the effect of L-arginine(L-Arg) or L-nitroarginine(L- NNA) chronic intervention before KA. METHODS The expression of iN OS mRNA by RT-PCR and behaviour were observed after administration of convulsan t dose of KA (10 mg?kg -1 ) and pretreatment with NO predecessor (L-Ar g, 40 mg?kg -1 ) or a inhibitor of NOS(L-NNA, 50 mg?kg -1 ) befo re KA. RESULTS The time-dependent seizures were induced on rats after giving KA, and were improved and serious in the animals with L-NNA pr etreatment, but they were alleviated by L-Arg pretreatment before KA. Compa red with control, iNOS mRNA expression was feebly at KA 3 h, continuative improv ement accompanying KA time prolonged, and it was markedly enhanced at KA 24 h. I t couldn't be examined at KA 2 d or 3 d, and was obviously improved at KA 7 d a gain. iNOS mRNA appeared weak in the rats hippocampus with L-Arg pretreatme nt after KA 1 h, whereas it wasn't found in L-NNA pretreatment animals. CONCLUSION iNOS mRNA expression appeared in the hippocampus of seizu re rats at a few time after KA, and L-Arg chronic intervention before KA ha s a little effect on it.
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AIM To explore the role of nitric oxide (NO) mediators in seizure behavior and the related expression of interlukin 6(IL 6). METHODS The IL 6 immunoreactivity (IL 6 ir) and behaviour were observed in kainic acid (KA) induced seizure following pretreatment with L nitroarginine( L NNA), a inhibitor of nitric oxide synthase(NOS), or the same number of moles of L arginine( L Arg). RESULTS The results showed that time dependent seizures were induced on animals after administration of KA (10 mg?kg -1 ), accompanied by the immediate enhancement of IL 6 ir in hippocampal structure, piriform area and cortex. The behaviors of rats were not markedly altered by chronic pretreatment with L NNA (50 mg?kg -1 ) or L Arg (40 mg?kg -1 ). However, after the administration of KA, the seizure behaviors were obviously different in the group of L NNA and L Arg respectively. Seizure was agrevated in the animals with L NNA pretreatment and many rats died at KA 3 hours, whereas seizure was alleviated after KA in the group of L Arg. IL 6 expression was apparently up regulated in some brain areas such as hippocampus in the group of KA pretreated with L NNA, but opposite effects appeared in the group pretreated with L Arg before KA injection. CONCLUSION These results indicate that endogenous NO mediators may alleviate the seizure behaviors and may down regulated the early expression of IL 6 in KA challenged seizure, but it the mechanism of the early expression of IL 6 with the homeostasis of endogenous NO mediator merits further study.nismoftheearlyexpressionofIL 6withthehome