Objective To study the technique of Western blot for the diagnosis of Lyme disease caused by Borrelia afzelii in China and to establish the standard criteria by operational procedure. Methods FP1, which is the represe...Objective To study the technique of Western blot for the diagnosis of Lyme disease caused by Borrelia afzelii in China and to establish the standard criteria by operational procedure. Methods FP1, which is the representative strain of B. afzelii in China, was analyzed by SDS-PAGE, electro transfer and irnmunoblotting assays. The molecular weights of the protein bands of FP1 were analyzed by Gel-Pro analysis software. In a study using 451 serum samples （159 patients with Lyme disease and 292 controls）, all observed bands were recorded. The accuracy of the WB as a diagnostic test was established by using the ROC curve and Youden index. Results Criteria for a positive diagnosis of Lyme disease were established as at least one band of P83/100, P58, P39, OspB, OspA, P30, P28, OspC, P17, and P14 in the IgG test and at least one band of P83/100, P58, P39, OspA, P30, P28, OspC, P17, and P41 in the IgM test. For IgG criteria, the sensitivity, specificity and Youden index were 69.8%, 98.3%, and 0.681, respectively; for IgM criteria, the sensitivity, specificity and Youden index were 47%, 94.2%, and 0.412, respectively.展开更多
基金supported by the 12th Five-Year Major National Science and Technology Projects of China (No.2011ZX10004-001)Natural Science Foundation of China (31100105)
文摘Objective To study the technique of Western blot for the diagnosis of Lyme disease caused by Borrelia afzelii in China and to establish the standard criteria by operational procedure. Methods FP1, which is the representative strain of B. afzelii in China, was analyzed by SDS-PAGE, electro transfer and irnmunoblotting assays. The molecular weights of the protein bands of FP1 were analyzed by Gel-Pro analysis software. In a study using 451 serum samples （159 patients with Lyme disease and 292 controls）, all observed bands were recorded. The accuracy of the WB as a diagnostic test was established by using the ROC curve and Youden index. Results Criteria for a positive diagnosis of Lyme disease were established as at least one band of P83/100, P58, P39, OspB, OspA, P30, P28, OspC, P17, and P14 in the IgG test and at least one band of P83/100, P58, P39, OspA, P30, P28, OspC, P17, and P41 in the IgM test. For IgG criteria, the sensitivity, specificity and Youden index were 69.8%, 98.3%, and 0.681, respectively; for IgM criteria, the sensitivity, specificity and Youden index were 47%, 94.2%, and 0.412, respectively.
文摘目的研究杠板归总黄酮对二甲基亚硝胺(DMN)诱导的肝纤维化大鼠的拮抗作用。方法将120只SD大鼠随机均分成正常组、模型组、秋水仙碱组和杠板归总黄酮高、中、低剂量(0.15、0.1、0.5 g·kg-1)组。除正常组外,各组大鼠均ip0.5%DMN溶液2.0 m L·kg-1,隔天注射1次,造模成功后,各给药组均ig给药,qd,连续8周,正常组与模型组ig等量生理盐水。于8周末取血和肝脏,酶联免疫吸附法检测血清透明质酸(HA)、层黏连蛋白(LN)、Ⅲ型前胶原(PCⅢ)和转化生长因子β1(TGF-β1);HE染色观察肝纤维化(HF)形成;Western blot法检测肝组织中TGF-β1的表达。结果与模型组比较,杠板归总黄酮各剂量均可有效降低HF大鼠血清中HA、LN、PCⅢ和TGF-B1的水平;杠板归总黄酮可明显降低HF大鼠肝脏中TGF-β1的表达。结论杠板归总黄酮对DMN诱导的大鼠HF具有良好的拮抗作用,可能通过抗肝损伤和降低TGF-β1的表达来实现。
