代谢综合征大鼠不同组织血管紧张素转换酶2的表达  

Expression of angiotensin-converting enzyme 2 in various tissues of rats with metabolic syndrome

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作  者:李晶[1] 甄玲玲[1] 闫苹屏[1] 李秀丽[1] 张小卫[1] 孙守刚[1] 白锋[1] 余静[1] 

机构地区:[1]兰州大学第二医院心内科,甘肃兰州730030

出  处:《第四军医大学学报》2009年第10期885-888,共4页Journal of the Fourth Military Medical University

基  金:甘肃省科学事业费项目(QS041-C33-17);甘肃省科技攻关计划项目(2GS064-A43-020-26)

摘  要:目的:探讨代谢综合征(MS)模型大鼠心脏、血管内皮、肺、肝、胰腺、肾、睾丸和脑组织血管紧张素转换酶2(ACE2)的表达.方法:20只雄性Wistar大鼠随机分为对照组和果糖诱导MS组,每组10只.6wk后测定三酰甘油(TG)、总胆固醇(TC)、高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆固醇(LDL-C)、胰岛素敏感指数(ISI)、内脏脂肪/体质量、体质量指数(Lee′sindex)、口服糖耐量(OGTT)为指标,判断造模成功情况.用免疫组化法检测上述8种组织中ACE2表达;用实时荧光定量PCR技术观察ACE2 mRNA表达.结果:与对照组相比较MS模型组大鼠血清TG[(1.18±0.19)vs(1.74±0.12)mmol/L];TC[(1.44±0.13)vs(2.04±0.18)mmol/L];LDL-C[(0.39±0.09)vs(0.89±0.12)mmol/L];体质量指数(297.48±9.82)vs(323.50±12.95);内脏脂肪/体质量(0.0373±0.0019)vs(0.0442±0.0014);血压[(109.34±5.02)vs(144.47±3.26)mmHg](1mmHg=0.133kPa)等均高于对照组(P均<0.05).HDL-C[(0.75±0.12)vs(0.43±0.10)mmol/L];ISI[(-4.48±0.07)vs(-5.26±0.16)];OGTT[(8.26±0.56)vs(9.22±0.59)mmol/L]均低于对照组(P均<0.05).与对照组相比较MS模型组大鼠ACE2mR-NA的表达量在心脏[(0.97±0.13)vs(0.55±0.12)],血管内皮[(16.71±0.46)vs(8.53±0.28)],肺[(31.11±0.24)vs(12.45±0.11)],肾[(37.48±0.27)vs(15.64±0.15)],睾丸[(4.85±0.05)vs(1.78±0.15)],脑组织[(24.27±0.25)vs(4.82±0.15)]也均低于对照组(P均<0.05).结论:MS减少大鼠心脏、血管内皮、肺、肾、睾丸和脑组织中ACE2的表达.AIM: To determine the expressions of angiotensinconverting enzyme 2 (ACE2) in the heart, blood vessel endothelium, lungs, livers, pancreas, kidneys, testis and brain in the rats with metabolic syndrome. METHODS: Twenty adult male Wistar rats were divided into control group ( normal diet + ordinary tap water n = 10) and fructose-induced MS group (normal diet + 30% -fructose solution n = 10). After 6 weeks, the level of triglyeride ( TG), total cholesterol ( TC ), high-density lipoprotein cholesterol ( HDL-C ), low-density lipoprotein cholesterol ( LDL-C ), insulin sensitivity index ( ISI), visceral fat mass over body weight ratio and Lee's index were assessed, and oral glucose tolerance test (OGTT) was evaluated. The levels of mRNA expression of ACE2 were determined by real-time PCR and the distribution and expression of ACE2 in these tissues were determined by immunohistochemistry. RESULTS: The levels of TG [ (1. 18± 0.19) vs (1.74 ±0.12)mmol/L], TC [(1.44±0.13) vs (2.04±0. 18)mmol/L], LDL-C [(0. 39±0.09) vs (0. 89 ±0.12) mmol/L ], Lee's index [ (297.48 ± 9.82) vs (323.50 ± 12.95 ) ], visceral fat mass over body weight ratio [ (0. 0373 ± 0.0019) vs (0.0442±0.0014)] and BP [(109.34 ±5.02) vs (144.47 ± 3.26)mmHg] markedly increased in MS group(P 〈0.05). Statistically significant reductions in HDL-C [ (0.75 ± 0.12) vs (0. 43 _+0.10) mmol/L] and ISI [( -4.48±0.07) vs ( -5.26± 0.16) ] was observed in MS group compared with those in control group. OGTY abnormity in MS group was obvious [ ( 8.26± 0.56) vs (9.22 ± 0.59) mmol/L ] ( P 〈 0.05 ). ACE2 mRNA in the heart [ (0.97 ±0. 13 ) vs (0.55 ±0. 11 ) ], blood vessel endothelium [(16.71±0.46) vs (8.53 ±0.28)], lungs[ (31.11 ±0.24) vs (12.45 ±0.11) ], kidneys[ (37.48±0.27) vs (15.64±0. 15) ], testis [(4.85 ±0.05) vs (1.78 ±0.15)] and brain [(24.23 ± 0.25) vs (4. 82 ±

关 键 词:代谢综合征 肽基二肽酶A 基因表达 大鼠 

分 类 号:R563.1[医药卫生—呼吸系统] R965.1[医药卫生—内科学]

 

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