锌对免血栓素前列腺环素及脂代谢的影响

目的 探讨锌对血栓素 B2 (TXB2 )、6 -酮 -前列腺环素 F1α(6 - keto- PGF1α)、脂代谢及抗氧化功能的影响。方法 纯系新西兰雄性大白兔 2 0只 ,分为对照组和加锌组 ,加锌组饮水中加葡萄糖锌 (锌浓度 15 .3 mm ol/L )。实验前后 3次观察 TXB2 、6 - keto- PGF1α、超氧化物歧化酶 (SOD)、脂质过氧化物 (L PO)、血清总胆固醇 (T、C)、脂蛋白 (L DL- C、HDL- C)、载脂蛋白 (Apo B1 0 0 、Apo AI)变化。结果 加锌组血清锌在补锌后持续升高 (P <0 .0 1) ,心、肝、肾、肌肉锌也升高 (P <0 .0 5或 0 .0 1)。血液及组织 SOD活性下降 (P <0 .0 5或 0 .0 1) ,L PO含量升高 (P <0 .0 5或 0 .0 1) ,血液及肝 SOD/ L PO比值变小 (P <0 .0 1)。TC、L DL- C、Apo B1 0 0 较实验前及对照组升高 (P<0 .0 5或 0 .0 1) ,HDL- C、Apo AI降低 (P <0 .0 5或 0 .0 1)。 TXB2 较实验前及对照组升高 (P <0 .0 1) ,6 - keto-PGF1α3个月时有升高趋势 ,6个月明显降低 (P <0 .0 1)。结论 高锌摄入能升高 TXB2 ,降低 6 - keto- PGF1α,干扰脂代谢 。

锌对血液粘度及凝血酶原时间影响的实验研究

目的 :探讨锌对机体锌、铜代谢、血液粘度及凝血酶原时间的影响。方法 :采用新西兰大白兔饮水中加葡萄糖酸锌 (锌含量 1 5.3mmol/L )喂养 ,设正常组对照 ,满 1 2个月后取血及肾组织测定锌、铜、血液粘度、血脂及凝血酶原时间。结果 :加锌组较对照组血清及肾脏锌含量显著升高 (P<0 .0 1 ) ,分别为 4.99倍、1 .79倍 ,全血粘度 (高切、中切、低切 )及血浆粘度明显升高(P<0 .0 5～ 0 .0 1 ) ,凝血酶原时间缩短 (P<0 .0 1 ) ,胆固醇、甘油三酯及血糖升高 (P<0 .0 1 ) ,红细胞数量及质量没有变化 (P>0 .0 5)。结论 :补锌能提高内环境锌水平 ,锌可通过干扰脂代谢引起血液粘度增加 ,凝血酶原时间缩短 ,合理用锌对于防治缺血性心脏血管病有重要意义。

Study on Effect of Zhixinkang Capsule(脂欣康胶囊)in TreatingUnstable Effort Angina and Hyperlipidemia and Its Function in Vascular Endothelium Protection

Objective:To observe the clinical effect and protection of vascular endothelium of Zhixin-kang Capsule (ZXKC) in middle-aged and old people with unstable effort angina and hyperlipidemia. Methods: Sixty-five patients with unstable effort angina were randomly divided into ZXKC group (34 cases) and control group (31 cases). Conventional western medical therapy was given to both groups, with ZXKC group receiving additional ZXKC treatment. Data of 20 healthy persons were taken as normal group. Forty-eight patients with hyperlipidemia were divided into ZXKC group treated with ZXKC (31 cases) and control group treated with Yixintong (17 cases). The changes of clinical symptoms and laboratory indexes in all the patients were observed before and after treatment. Results: In patients with unstable effort angina, the efficacy of treatment of ZXKC, the withdrawal rate of nitroglycerin, the relieving of symptoms, the improvement of the electrocardiogram, the counts of circulating endothelial cells, the content of platelet P-selectin, the content of plasma endothelin (ET), the activity of superoxide dismutase (SOD) and the activity of malonyldialdehyde (MDA) were all better than those in the control group. In patients with hyperlipidemia, there was no significant difference in lipids reduction between ZXKC group and the control group. In both groups, the total cholesterol (TC), triglyceride (TG), low density lipo-protein-cholesterol (LDL-C), lipoprotein(a) [Lp(a)] , ET, oxidized low density lipoprotein, MDA, arte-riosclerotic index (AI) all lowered obviously, while the SOD, HDL-C and calcitonin gene-related peptide (CGRP) were all elevated markedly. In the ZXKC group, the nitric oxide(NO) increased significantly whereas the ET/CGRP and ET/NO decreased markedly. The total effective rate in symptom relieving, the markedly effective rate, the reduction of TC, ET and ET/CGRP, and the elevation of SOD in ZXKC group were all superior to those in the control group. Conclusion: ZXKC could effectively resist myocardial ischemia, relieve angina, reduce blood lipids, protect vascular endothelial cells, inhibit the activation of platelets, and resist lipid peroxidation.