螺旋藻激酶对动脉粥样硬化模型大鼠血管内皮功能的影响
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篇名: 螺旋藻激酶对动脉粥样硬化模型大鼠血管内皮功能的影响
TITLE:
摘要: 目的:研究螺旋藻激酶(SPK)对动脉粥样硬化模型大鼠血管内皮功能的影响。方法:将60只大鼠随机分为正常对照组(蒸馏水)、模型组(蒸馏水)、阳性对照组(辛伐他汀,0.005 g/kg)和SPK低、中、高剂量组(80、160、320 U/kg)。除正常对照组外,其余各组大鼠均复制动脉粥样硬化模型;同时,各组大鼠ig相应药物,每天1次,连续给药12周。测定大鼠血清中总胆固醇(TC)、三酰甘油(TG)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)、白细胞介素6(IL-6)和肿瘤坏死因子α(TNF-α)的含量;苏木精-伊红染色观察大鼠胸主动脉血管内膜的形态改变。结果:与正常对照组比较,模型组大鼠血清中TC、TG、LDL-C、IL-6和TNF-α含量增加(P<0.01),HDL-C含量降低(P<0.01);血管内皮细胞脱落,内膜增生、向管腔内突起,平滑肌细胞增殖且排列紊乱,中膜弹力纤维崩解断裂。与模型组比较,各给药组大鼠血清中TC、TG、LDL-C、IL-6和TNF-α含量下降(P<0.05或P<0.01),阳性对照组和SPK中、高剂量组大鼠血清中HDL-C含量增加(P<0.05);给药组大鼠血管内皮细胞形态较模型组明显改善,其中SPK中、高剂量组大鼠血管内皮细胞各层结构完整、内膜基本光滑,SPK中剂量组大鼠血管中膜平滑肌细胞排列稍紊乱,与正常对照组比较无明显变化。结论:SPK有明显的降脂和抗炎作用,可保护血管内皮功能;其作用机制可能与降低血清中TC、TG、LDL-C、IL-6、TNF-α含量和升高血清中HDL-C含量有关。
ABSTRACT: OBJECTIVE: To study the effects of spirulina kinase (SPK) on the vascular endothelial function of model rats with atherosclerosis. METHODS: 60 rats were randomly divided into normal control group (distilled water), model group (distilled water), positive control group (simvastatin, 0.005 g/kg) and SPK low-dose, medium-dose, high-dose groups (80, 160, 320 U/kg). Except for normal control group, rats in other groups were induced for model of atherosclerosis. All groups were intragastrically administrated relevant medicines at the same time, once a day for consecutive 12 weeks. Total cholesterol (TC), triglyceride (TG), low density lipoprotein cholesterol (LDL-C), high density lipoprotein cholesterol (HDL-C), interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α) contents in serum of rats were measured. And the changes of thoracic aortic endothelium morphology were observed by HE staining. RESULTS: Compared with normal control group, TC, TG, LDL-C, IL-6, TNF-α contents in serum of rats in model group were increased (P<0.01), HDL-C content in serum was decreased (P<0.01); vascular endothelial cells fell off, intimal proliferation projected into the lumen, smooth muscle cell proliferated and disordered, medium film elastic fiber disintegrated and fractured. Compared with model group, TC, TG, LDL-C, IL-6, TNF-α contents in serum of rats in administration groups were decreased (P<0.05 or P<0.01), HDL-C content in positive control group and SPK medium-dose, high-dose groups was increased (P<0.05). Vascular endothelial cell morphology was improved significantly in administration groups, in which, vascular endothelial cells were structurally intact in SPK medium-dose, high-dose groups, inner membrane was basically smooth; medium smooth muscle cells arranged slightly disordered in SPK medium-dose group. Compared with normal control group, there were no obvious changes. CONCLUSIONS: SPK shows obvious lipid-lowering and anti-inflammatory effects, it can protect vascular endothelial function. The mechanism may be related to reducing TC, TG, LDL-C, HDL-C, IL-6, TNF-α contents and increasing HDL-C content in serum.
期刊: 2017年第28卷第19期
作者: 何秋璟,王慧杰,庞辉,杨莹,黄媛恒,黄泽裕,江梦凤,华媛媛,农秀红,张康玲
AUTHORS: HE Qiujing,WANG Huijie,PANG Hui,YANG Ying,HUANG Yuanheng,HUANG Zeyu,JIANG Mengfeng,HUA Yuanyuan,NONG Xiuhong,ZHANG Kangling
关键字: 螺旋藻激酶;动脉粥样硬化;白细胞介素6;肿瘤坏死因子α;血管内皮;大鼠
KEYWORDS: Spirulina kinase; Atherosclerosis; Interleukin-6; Tumor necrosis factor-α; Vascular endothelium; Rats
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