有氧运动对老年自发性高血压大鼠心肌纤维化的影响

摘要：目的：探讨有氧运动对老年自发性高血压大鼠（SHR）心肌纤维化的影响及其可能的基质金属蛋白酶表达机制。方法：12只16月龄雄性SHR大鼠随机分为安静组（SHR-SED）和运动组（SHR-EX）,另选用12只同龄雄性WKY大鼠随机分为安静组（WKY-SED）和运动组（WKY-EX）。SHR-EX组和WKY-EX组进行8周有氧运动,坡度0°,20 m/min,60 min/day,5 d/周。8周后,测量各组大鼠血压、全心质量指数、心肌组织中胶原蛋白的表达以及基质金属蛋白酶-9和基质金属蛋白酶组织抑制剂-1的表达情况。结果：1）SHR-SED组大鼠收缩压显著高于WKY-SED组,SHR-EX组和WKY-EX组的收缩压分别显著低于SHR-SED组和WKY-SED组;2）SHR-SED组全心质量指数显著高于WKY-SED组,SHR-EX组显著低于SHR-SED组;3）SHR-SED组相比于WKY-SED组心肌胶原容积分数、I、III型胶原表达显著升高,SHR-EX组相比于SHR-SED组显著降低;4）SHR-SED组相比于WKY-SED组MMP-9以及MMP-1/TIMP-1显著升高,SHE-EX组相比于SHR-SED组显著降低。结论：老年自发性高血压大鼠心肌呈现明显纤维化,其中MMP-9与TIMP-1的表达平衡是其重要原因;有氧运动则可通过抑制MMP-9与TIMP-1的表达失衡从而有效改善老年高血压心肌纤维化程度。     

Wernicke encephalopathy following splenectomy in a patient with liver cirrhosis: a case report and review of the literature

Objective  

To report a case of Wernicke encephalopathy in the early stage after surgery.     

Effect of matrine and carvedilol on collagen and MMPs activity of hypertrophy myocardium induced by pressure overload

INTRODUCTION Matrine, a monomer of traditional Chinese medi-cine, comes from leguminosae plants such as Kusheng, is quinoilizidine with four-loop and molecular formula of C15H24N20. Matrine has been proved to have anti-arrhythmia (Xu et al., 2004), anti-hypoxia and decreasing heart rate effects (Zhang et al., 1990a; 1990b) in many animal experiments, and has the role of inducing calmness (Luo et al., 2001) and lowering body temperature (Tao and Wan, 1992). Traditional Chinese medicin…     

梗阻性黄疸大鼠肝脏损害及血清毒性物质变化

目的：探讨梗阻性黄疸（梗黄）大鼠肝脏损害及其血清毒性物质的变化。方法：采用胆总管结扎方法建立梗阻性黄疸大鼠模型,将36只大鼠随机分为假手术（sham）组6只、梗阻性黄疸（CBDL）组30只（CBDL组又分为1周、2周、3周、4周、5周亚组,每组6只）。监测各组血液TNF-α、内毒素、肝功能变化。结果：CB—DL组均可见肝细胞坏死及增生,汇管区可见胆管扩张、胆汁淤积,肝组织改变随梗阻时间的延长而逐渐加重,血清内毒素及TNF-α含量与梗阻时间明显相关。结论：CBDL大鼠肝脏形态改变明显,血ALT、TBIL、内毒素、TNF-α含量明显升高,并与梗黄时间有关。     

银杏叶总黄酮对人肝癌HepG2细胞增殖与凋亡的影响

目的探讨银杏叶总黄酮对体外培养的人肝癌细胞HepG2增殖与凋亡的影响。方法将银杏叶总黄酮作用于体外培养的人肝癌细胞HepG2,MTT法检测其对HepG2细胞增殖的影响,缺口末端核苷标记（TUNNEL）法检测其对HepG2细胞凋亡的影响。结果银杏叶总黄酮对体外培养的人肝癌细胞HepG2的增殖效率下降,使凋亡细胞数增加（P〈0．01）,且呈剂量依赖效应。结论银杏叶总黄酮对体外培养的人HepG2细胞增殖有抑制作用,并能诱导细胞凋亡。     

丹参注射液治疗肝纤维化的实验研究

目的探讨丹参注射液抗肝纤维化作用机理.方法取40只成年wistar大鼠,利用猪血清腹腔注射法,连续6周,复制免疫性肝纤维化模型.治疗组采用大、小剂量丹参液肌肉注射,其剂量分别为0.3ml/kg和0.15ml/kg,每日一次,连续4周.取肝脏切片,HE和Mollory染色,光镜下观察.检测血清SOD活性、MDA含量和肝功能.结果大剂量治疗组肝细胞空泡减少,胶原纤维大部分消失,SOD活性增高,MDA含量降低,与模型组比较有显著性差异(P＜0.05).结论大剂量肌注丹参液,具有治疗肝纤维化的功能.     

Science Letters:A novel way of liver preservation improves rat liver viability upon reperfusion

Background/aim:Currently, the liver is cold-preserved at 0～4 °C for experimental and clinical purposes. Here, we investigated whether milder hypothermia during the initial phase of the preservation period was beneficial for liver viability upon reperfusion. Methods:In the first set of experiments, rat livers were preserved either conventionally in clinically used histidine-trypthopan-ketoglutarate (HTK) solution (Group A:45 min and Group B:24 h) or by slow cooling HTK solution (from 13 °C to 3 °C) during the initial 45 min of preservation (Group C:24 h). In the second set of experiments, additional groups of livers were evaluated:Group BB—preservation according to Group B and Group CC—preservation according to Group C. Further, some livers were preserved at 13 °C for 24 h. Livers were then reperfused using a blood-free perfusion model. Results:Bile production was approximately 2-fold greater in Group C compared to Group B. Alanine transaminase (ALT) and aspartate transaminase (AST) release into perfusate were 2～3-fold higher in Group B compared to Group C. No significant differences were found in ALT and AST release between Group C and Group A. Livers in Group CC compared to Group BB exhibited significantly lower portal resistance, greater oxygen consumption and bromosulfophthalein excretion into bile and lower lactate dehydrogenase (LDH) release into perfusate. Histological evaluation of tissue sections in Group BB showed parenchymal dystrophy of hepatocytes, while dystrophy of hepatocytes was absent in Group CC. Livers preserved at 13 °C for 24 h exhibited severe ischemic injury. Conclusion:These results suggest that the conventional way of liver preservation is not suitable at least for rat livers and that slow cooling of HTK solution during the initial phase of cold storage can improve liver viability during reperfusion.     

肝癌患者血清SOD及MDA的变化研究

目的:探索肝癌患者血清SOD、MDA的变化。对肝癌患者26例和健康对照组30例。方法:对肝癌患者均应用改良TBA微量法测定血清丙二醛(MDA)、以黄嘌呤氧化酶法测定超氧化物歧化酶(SOD)水平的变化。结果:肝癌组患者血清MDA水平显著高于对照组(P<0.01),而血清SOD水平显著低于对照组(P<0.01)。结论:提示肝癌患者存在明显的抗氧化能力障碍,通过血清MDA、SOD水平的检测,可为肝癌的临床治疗及疗效观察提供一定的依据。     

天麻钩藤饮对高血压病肝阳上亢证患者超氧化物歧化酶的影响

目的：观察天麻钩藤饮对高血压病（肝阳上亢型）患者血浆超氧化物歧化酶（SOD）的影响。方法：采用随机对照方法，观察天麻钩藤饮组（30例）和对照组（30例）治疗前后血压水平及血浆超氧化物歧化酶的变化。结果：两组治疗后血压明显降低，超氧化物歧化酶明显增高（P〈0．01，P〈0．05），组间比较无显著差异（P〉0．05）。结论：天麻钩藤饮能显著升高高血压病患者血浆超氧化物歧化酶的水平。