Objective To investigate the relationship between the polymorphism of 7α-hydroxylase (CYP7A1) and cholestero1 cholecystolithiasis. Methods CYP7A-1 genotyping was performed by PCR-RFLP approach in 160 cholesterol cholecystolithiasis patients and 94 control subjects.Results The frequencies of C, A allele of CYP7A1 gene were 83.75%, 16.25% in cholesterol cholecystolithiasis patients and 81.91% and 18.09% in control group. There was no significant difference in frequencies of allele and genotype in A-204C polymorphism between two groups (Pgt;0.05). In control group and cholesterol cholecystolithiasis group， LDL-C levels in AA genotypes were lower than those in CC and CA genotype (Plt;0.05). Conclusion The results indicate that no direct association is found between CYP7A-1 gene and cholesterol cholecystolithiasis，but there is significant correlation between the polymorphism of the CYP7A-1 gene and the levels of LDL-C.
【Abstract】Objective To observe the bacteria in cholesterol stones by electronic microscope and to explore the role of bacteria in the stone formation.Methods Twelve patients with cholelithiasis underwent operations (male 6, female 6, average age 54.6 years） with cholecystolithiasis 5, extrahepatic and intrahepatic bile duct stone 1, common bile duct stone combining with gallstone 6. The cholesterol stones were observed by electronic microscope.Results There were bacterial structures in the cholesterol stones and cholesterol crystals.Conclusion There are bacteria in the core and peripheral of cholesterol stones, which suggests that bacteria may play an initial role in the formation of cholesterol stones.
To study of plasma lipoprotein cholesterol and effects of these changes on bile acids and cholesterol in bile during gallstone formation in rabbit model. This gallstone model was induced by high cholesterol diet (HCD). The rabbits were divided into five groups and there were ten animals in each group. The plasma highdensity lipoprotein cholesterol (HDL-C) and its subgroups (HDL2-C, HDL3-C), low-density lipoprotein cholesterol (LDL-C), very low-density lipoprotein cholesterol (VLDL-C), total cholesterol, triglyceride, phospholipid, bile acids and cholesterol of bile were investigated in different time. The results were as follow: ①As the time of feeding HCD passed by, the plasma total cholesterol, LDL-C and VLDL-C increased markedly (3-week group and 4-week group vs control group, Ｐ＜0.05). Though the plasma HDL-C and its subfractions HDL2-C and HDL3-C did not change significantly, the function of HDL in transporting plasma cholesterol decreased markedly (from 80.00% to merely 3.68%); ②Cholesterol in bile increased gradually and there were significant differences when 3-week group and 4-week group comparing with control group. The concentration of GDCA and GCA in bile changed slightly (Ｐ＞0.05). These results suggest that the changes of plasma lipoprotein cholesterol may affect the metabolism of cholesterol and bile acids and it may take an important role in the formation of gallstone.
The aim of the this study was to search for bacterial DNA sequences in cholesterol gallstones with negative bacterial culture by NP-PCR technique. Bacterial gene fragments were amplified in vitro from DNA which were extracted from cholesterol gallstones in gallbladder for identifying the existence of bacteria. The gallbladder gallstones of 30 patients were analysed. Bacterial DNA was found in the stones of 26 patients, indicating that most cholesterol gallstones harbor bacterial DNA.
To declare the clinical value of lowing serum LDL-C level in coronary heart disease by reviewing the history of its clinical trials in the last 4 decades.
目的:对无明显心血管病(CVD)临床症状者的高甘油三酯(TG)≥1.60 mmol/L低高密度脂蛋白胆固醇(HDL-C)≤1.18 mmol/L伴有活动平板运动试验(TET)心电图(ECG)阳性和TET ECG阴性的缺血性心脏病(IHD)的危险因素进行了对比观察。〖HTH〗方法:〖HT5”SS〗对无明显CVD临床症状的2900例受试者检测TG/HDL-C、其中伴有TET ECG阳性(缺血型ST-T改变)者500例和TET ECG阴性(不伴有缺血型ST-T改变)者2500例进行了5年对比观察, 预测其预后。〖HTH〗结果〖HTSS〗:在 5年随访的观察中高TG(≥1.60 mmol/L)/低HDL-C(≤1.18 mmmol/L)伴有TET ECG阳性者500例的IHD的发生(30例)率为6.00%;IHD死亡(14例)率为2.80%。而高TG/低HDL-C TET ECG 阴性者2500例的IHD发生(25例)率为2.80%, 死亡(8例)率为0.32%, Plt;0.001。表明高TG/低HDL-C伴有TET ECG阳性者是IHD的较大危险因素。结论:高TG/低H DL-C, 伴有TET ECG阳性对IHD者的死亡率的预测有重要意义, 提示二者指标共同作用对IHD者极为不利。