血脂异常与防治的新概念

血浆脂质异常是动脉粥样硬化 (AS)形成及发展的主要因素。 AS主要与血中总胆固醇 (TC)、甘油三酯 (TG)、低密度脂蛋白 (L DL - C)的升高和高密度脂蛋白 (HDL )的降低有关 [1 ] 。 L DL - C升高与 AS危险增加有直接关系。因此 ,降低L DL- C是治疗 AS的首要目标。最新流行病学提示 ,血中HDL- C水平每升高 1mg/ dl,可使 CHD的危险率降低 2 %～3%。 HDL - C小于 0 .9mmol/ L是引致冠心病的独立而强力的危险因素 ,大于 1.6 mmol/ L 时能把肝细胞生成过高的胆固醇转化 ,且能抑制脂蛋白氧化 ,阻碍 AS的形成 ,保护血管免于受损。所…     

国产辛伐他汀与舒降之调血脂作用的对比观察

目的 :对比观察国产辛代他汀与进口辛伐他汀 (舒降之 )对高脂血症患者的调血脂作用。　　方法 :将 16 0例高脂血症患者以抽签法随机分为辛伐他汀组 (n=10 0 )及舒降之组 (n=6 0 ) ,分别口服国产辛伐他汀及舒降之。观察用药 4周及 8周患者的血清总胆固醇 (TC) ,低密度脂蛋白胆固醇 (L DL- C) ,高密度脂蛋白胆固醇 (HDL- C) ,(TC- HDL- C) /HDL- C及甘油三酯 (TG)变化。　　结果 :服用国产辛伐他汀 4周及 8周可分别使患者血清 TC降低 2 2 .8%、2 8.1% ,L DL - C降低 2 7.9%、32 .2 % ,(TC-HDL- C) /HDL- C降低 36 .3%、45 .2 % ,HDL- C升高 13.4%、16 .1% ,合并高甘油三酯血症患者 TG降低 19.4%、2 9.4% ,但对单纯高胆固醇血症患者 TG水平无显著影响。服药 4周即有明显调血脂疗效。　　结论 :国产辛伐他汀调血脂作用疗效肯定 ,与其相应进口产品舒降之比较基本相同。     

多巴酚丁胺、心得安在动脉单层内皮细胞上对脂类代谢的影响

目的 :在老年大鼠主动脉单层内皮细胞上探讨β-阻滞剂和β-激动剂对血浆脂代谢的影响。方法 :将多巴酚丁胺、心得安分别与高脂血清混合 ,加在大鼠主动脉单层内皮细胞 (AEC)上孵育 2 4小时 ,采用酶法测定其上清液中总胆固醇 (TC)、甘油三酯 (TG)、高密度脂蛋白 (HDL)、低密率脂蛋白(L DL)和极低密度脂蛋白 (VL DL)的浓度。结果 :与对照组比较 ,多巴酚丁胺组 TC、LDL- C和 VL DL- C均增高 (分别为 P<0 .0 5,P<0 .0 1和 P<0 .0 0 1)。心得安组 HDL- C和 VLDL- C降低 (均为 P<0 .0 1)。结论 :两药对血将中脂类代谢均有影响 ,其结果明显不同 ,对动脉粥样硬化 (AS)可能有潜在作用     

女性原发性高血压患者绝经前后脂蛋白(a)及血脂水平变化的研究

目的　观察女性原发性高血压患者绝经前后脂蛋白 (a) [L p(a) ]及血脂水平的变化 ,探讨其对女性冠心病发病情况可能存在的影响。方法　女性原发性高血压患者 12 1例 ,测定 L p(a)、总胆固醇 (TC)、三酰甘油 (TG)、低密度脂蛋白胆固醇 (L DL- C)和高密度脂蛋白胆固醇 (HDL- C)。对比绝经前后 L p(a)及血脂水平的变化 ,并与女性健康体检者 (对照组 )进行对比。结果　高血压组 L p(a)、TC、TG、L DL - C均显著高于对照组 ,而 HDL - C及 HDL - C/TC则明显低于对照组 ,在所有原发性高血压患者中 ,绝经后的患者 L p(a)、TC、TG、L DL - C显著高于绝经前患者 ,而 HDL - C/ TC则前者低于后者。结论　绝经后原发性高血压患者 L p(a)、TC、L DL - C均明显高于绝经前患者 ,而HDL- C/ TC则低于绝经前患者 ,提示绝经后女性原发性高血压患者 L p(a)及血脂水平增高与内源性雌激素水平下降有关 ,是绝经后冠心病发病率明显上升的重要原因。     

绝经后女性冠状动脉病变与血脂代谢的关系

目的 :研究绝经后女性冠心病 ( CHD)患者血脂特点 ,探讨血脂代谢与冠状动脉病变的关系。方法 :以酶法测定和观察 94例经冠状动脉造影证实有一支以上主要冠状动脉狭窄≥ 5 0 %的绝经后女性 CHD患者的总胆固醇 ( TG)、甘油三酯 ( TC)、高密度脂蛋白胆固醇 ( HDL- C)、低密度蛋白胆固醇 ( L DL- C)、载脂蛋白 A1 、B( apo A1 、apo B) ,并以同期同年龄范围的健康体检女性 10 0例为对照组。结果 :1CHD组的 TG和 L DL- C明显高于对照组 ,HDL- C和 apo A1 明显低于对照组 ,而 TC仅轻度高于对照组 ;2多元逐步回归分析的有价值的判别指标为 apo A1 和 L DL- C;3 CHD组高 TG者 5 4例 ( 5 3 .2 % ) ,高 TG者冠状动脉双支及三支病变 2 9例 ( 5 8% ) ,而TG正常者双支及三支病变 13例 ( 2 9.5 % )。结论 :女性绝经后 CHD患者高 TG,高 L DL - C,低 HDL - C和低 apo A1是 CHD的重要危险因素 ,apo A1 和 L DL - C在致 CHD方面意义更大 ,其中高 TG者冠状动脉病变的严重程度更为明显     

老年男性动脉粥样硬化患者雄激素与血脂水平的关系

目的　探讨老年男性动脉粥样硬化 (AS)患者内源性雄激素水平和血脂之间的关系。方法　用放射免疫法测定血清总睾酮 (TT)、游离睾酮 (FT)水平 ,用比色法测定血总胆固醇 (TC)、甘油三酯 (TG)、高密度脂蛋白胆固醇 (HDL- C)、低密度脂蛋白胆固醇 (LDL- C)、极低密度脂蛋白(VLDL- C)的浓度。比较病例组与对照组各因子水平的差异 ,组内分析 FT与脂质水平的相关性。结果　病例组 FT与 HDL- C水平明显低于对照组(P<0 .0 5) ,而 L DL - C、VLDL- C、TC和 TG水平则显著高于对照组 (P<0 .0 5)。无论在病例组还是对照组 ,FT均与 HDL- C呈正相关 (P<0 .0 5) ,与L DL- C、TG呈负相关 (P<0 .0 5) ;在病例组 ,FT与 TC呈负相关 (P<0 .0 5)。结论　 AS患者存在低雄激素水平和脂质代谢紊乱 ,正常水平 FT可能具有延缓 AS发生、发展的生理效应 ,雄激素影响 AS进程可能与脂质代谢有关     

超声检测股动脉、腹主动脉及颈动脉粥样硬化与冠状动脉粥样硬化的相关性

目的:探讨股动脉、腹主动脉及颈动脉粥样硬化与冠状动脉粥样硬化的相关性。方法: 采用高频超声测量109例行冠状动脉造影术后1周的患者股动脉、腹主动脉及颈动脉的内-中膜厚度（IMT）、斑块积分及斑块数目。结果: 股动脉、腹主动脉及颈动脉粥样硬化与冠状动脉粥样硬化呈正相关（P<0.01、P<0.05）;股动脉斑块预测冠状动脉粥样硬化的灵敏度为89%,特异度为77%,准确度84%;腹主动脉斑块预测冠状动脉粥样硬化的灵敏度为73%,特异度为72%,准确度72%;颈动脉斑块预测冠状动脉粥样硬化的灵敏度为83%,特异度为79%,准确度82%。结论: 超声检查股动脉、腹主动脉及颈动脉IMT及斑块可间接预测不同程度的冠状动脉粥样硬化;股动脉的灵敏度与准确度较腹主动脉更好。     

高胆固醇饮食联合球囊损伤建立兔腹主动脉粥样硬化模型及评价

目的探讨高胆固醇饮食联合球囊损伤建立兔腹主动脉粥样硬化模型及评价方式。方法选择雄性新西兰大耳白兔16只,随机分为对照组(n=8)和实验组(n=8),适应性喂养1 w后,两组均通过手术造成腹主动脉球囊损伤,对照组给予普通饮食(基础饲料),实验组给予高胆固醇饮食,两组均喂养12 w。分析饲养前后血清总胆固醇(TC)、甘油三酯(TG)、高密度脂蛋白(HDL)、低密度脂蛋白(LDL)水平。饲养12 w后,采用血管造影和超声计算药物刺激后收缩率;处死试验模型,并对硬化血管进行病理学检查。结果饲养后,对照组血脂指标与饲养前比较无显著差异(均P0.05),实验组饲养后TC、TG、LDL水平较饲养前显著升高,且均高于对照组(均P0.05)。实验组药物刺激后收缩率均显著高于同组正常部位与对照组损伤部位(均P0.05);实验组硬化分级、内膜厚度和内膜增生面积均显著高于对照组,管腔面积显著低于对照组(均P0.05)。结论胆固醇饮食联合球囊损伤建立兔腹主动脉粥样硬化模型效果良好、稳定,血液生化指标和组织病理改变典型,并可用血管造影和超声的方法确定斑块性质,可靠实用,是研究动脉粥样硬化的良好模型。     

ApoE~(-/-)小鼠动脉粥样硬化进程中microRNA-146a的表达变化

目的:观察ApoE~(-/-)小鼠动脉粥样硬化发生过程中microRNA-146a(miR-146a)的变化,探讨miR-146a与动脉粥样硬化之间的关系。方法:在ApoE~(-/-)小鼠中通过高脂高胆固醇喂饲构建动脉粥样硬化模型,分别在喂饲后第0周、4周、8周、12周、16周时采血和分离主动脉组织,通过HE染色和油红O染色观察主动脉组织的斑块形态,计算主动脉内膜/中膜比值和主动脉斑块的脂质含量;采用Real-Time PCR检测第0周、4周、8周、12周、16周时血浆和主动脉组织的miR-146a水平。结果:在高脂高胆固醇饲养后第8周时ApoE~(-/-)小鼠主动脉组织开始出现动脉粥样硬化,在第16周时主动脉粥样硬化最显著,16周时主动脉组织的内膜/中膜比值和主动脉斑块的脂质含量显著升高(P0.01);在动脉粥样硬化发生过程中,小鼠血浆和主动脉组织中的miR-146a水平均明显升高,其中血浆miR-146a的峰值出现在第8周(P0.01),之后血浆miR-146a逐渐下降;而主动脉组织的miR-146a水平从第4周开始升高(P0.05),逐渐上升至16周时达到峰值(P0.01);主动脉组织中miR-146a水平与ApoE~(-/-)小鼠主动脉粥样硬化呈强正相关性(r=0.892 5,P0.000 1)。结论:miR-146a可能参与了ApoE~(-/-)小鼠主动脉主动脉粥样硬化的发生。     

脑梗死病人主动脉根部宽度的测量及意义

目的 通过观察主动脉根部宽度(ARD),研究主动脉粥样硬化与脑梗死(CI)的关系.方法 选择155例CI病人及84例正常对照者,使用二维超声在心室收缩期测量主动脉根部内径宽度,并监测血压、空腹血糖(GLU)、总胆固醇(TC)、高密度脂蛋白胆固醇(HDL-C)和低密度脂蛋白胆固醇(LDL-C)等生化指标.结果 脑梗死组ARD为(29.46±2.58)mm,对照组ARD为(27.28±2.21) mm.两组比较有统计学意义(P<0.01).脑梗死组血压、TC及LDL-C水平均高于对照组(P<0.05或P<0.01).结论 ARD与CI发病密切相关,主动脉粥样硬化是CI的重要危险因素.     

Endothelium-dependent relaxation in experimental atherosclerosis in the rabbit

The effect of feeding a diet supplemented with lipids and containing 2% cholesterol on the endothelium-dependent relaxation of rabbit aorta to acetylcholine was assessed. The effect of feeding a standard rabbit diet after an initial period of 2% cholesterol feeding was assessed also. Age-matched male, New Zealand white rabbits were fed either a 2% cholesterol diet or a standard rabbit diet. The animals were anesthetized with pentobarbitone sodium (25 mg/kg) and killed either at the beginning of the study (0 weeks) or at 4, 8, or 10 weeks. The animals in the reversal study were fed the 2% cholesterol diet for 6 weeks and killed after an additional 14 and 32 weeks on standard diet. The extent of atherosclerosis in the aorta was assessed by Sudan Red staining, estimation of tissue cholesterol, and light and electron microscopy. The relaxation response to acetylcholine was measured in rings of the thoracic aorta following precontraction with norepinephrine (-6.0 log mol/l). The relaxation was significantly impaired in aortas from rabbits fed the 2% cholesterol diet compared to aortas from animals fed the standard diet. The impairment of relaxation was apparent as early as 4 weeks after the start of the 2% cholesterol diet and remained impaired over the next 6 weeks. No improvement in endothelium-dependent relaxation was seen in rabbits on the reversal diet for 14 and 32 weeks. Thus, endothelium-dependent relaxation is attenuated in animals fed a 2% cholesterol diet, and the loss of relaxation persists for at least 32 weeks after the animals are returned to a standard diet.     

补肾宁心方对去势高脂血症家兔主动脉血管细胞粘附分子1表达的调节

为了探讨补肾宁心方对去势雌兔动脉粥样硬化形成的影响及其可能的机制，将26只3月龄新西兰雌兔随机分为正常对照组、假手术组、去势对照组和治疗组(卵巢切除并灌以补肾宁心中药复方)，除正常对照组外均于术后2周给予高脂饮食，治疗组同时灌胃给药，连续3个月。12周末测定血清总胆固醇、甘油三酯、高密度脂蛋白胆固醇和低密度脂蛋白胆固醇水平；取主动脉行组织形态学及扫描电镜观察，并应用免疫组织化学方法检测主动脉血管细胞粘附分子1的蛋白表达。结果发现，与去势对照组比较，补肾宁心方对血脂变化无明显影响，但能明显降低主动脉粥样斑块面积与动脉内膜比值，降低内膜中膜厚度比，减轻主动脉病理损害，抑制主动脉血管细胞粘附分子1的蛋白表达。结果提示，补肾宁心方可能通过抑制主动脉血管细胞粘附分子1的表达从而阻止动脉粥样硬化的发生发展。     

Effect of F-1394, an acyl-CoA:cholesterol acyltransferase inhibitor, on atherosclerosis induced by high cholesterol diet in rabbits

Cholesterol-fed rabbits were used to study the anti-atherosclerotic effect of (1S,2S)-2-[3-(2,2-dimethylpropyl)-3-nonylureido]cyclohexane-1-yl 3-[(4R)-N-(2,2,5,5-tetramethyl-1,3-dioxane-4-carbonyl)amino]propionate (F-1394), an acyl-CoA:cholesterol acyltransferase (ACAT) inhibitor. To test its effect on the development of atherosclerosis, rabbits were fed a high-cholesterol diet (HCD) for 6 weeks, followed by regular chow (RC) for 12 weeks plus 0 or 100 mg/kg per day F-1394. Serum total cholesterol (TC) rose to approximately 2000 mg/dl on HCD and then declined gradually after the change in diet in both groups. F-1394 significantly reduced the extent of the atherosclerotic lesions and the total and esterified cholesterol contents of the aorta (by 57,38, and 59%, respectively), without affecting the serum TC level. To clarify whether F-1394 accelerates the regression of preexisting atherosclerosis, rabbits were fed HCD for the first 6 weeks and then RC for the next 6 weeks. Then, the rabbits were given 0 or 100 x 2 mg/kg per day F-1394 for another 12 weeks while on RC. F-1394 significantly reduced the extent of the atherosclerotic lesions and the total and esterified cholesterol content in the aorta (by 31, 31, and 43%, respectively), without affecting the serum TC level. These results demonstrate that F-1394 both prevents the formation of atherosclerosis and accelerates its regression without affecting the serum TC level, indicating that F-1394 acts directly on the arterial wall.     

Antiatherosclerotic and antihyperlipidemic effects of octimibate sodium in rabbits

Octimibate sodium (8-[(1,4,5-triphenyl-1H-imidazol-2-yl)oxy]octanoic acid, sodium salt; NAT 04-152) was investigated for its antihyperlipidemic and antiatherosclerotic activities in New Zealand White rabbits. Hypercholesterolemia and atherosclerosis were induced by feeding a diet containing 0.3% cholesterol for 8 weeks. In addition, repeated injections of bovine serum albumin (BSA) were used to enhance the experimental atherosclerosis. Octimibate sodium, 10.0 and 30.0 mg/kg p.o., reduced both the increase in serum cholesterol levels and the aortic plaque-formation (by about 50% in the higher dose group) as compared to control animals. Serum triglyceride levels were not influenced. Biochemical and histological examinations of the aortas showed reduced cholesterol contents in the higher dose group and a dose-dependent inhibition of pathological changes in the aortas.     

A nicotinic acid ester and experimental atherosclerosis: no significant effect of treatment with niceritrol (pentaerythritoltetranicotinate) on cholesterol in aorta of rabbits previously fed with cholesterol-enriched diet.

The influence of niceritrol on cholesterol in serum, liver and inner aorta of 115 rabbits was studied during a period where a cholesterol-enriched diet was given and during two succeeding periods after which cholesterol addition to the diet was discontinued. Niceritrol given together with cholesterol for 6 weeks reduced significantly the concentration of cholesterol in serum and liver, but not in the inner aorta. During 16 weeks decrease of serum cholesterol after discontinuation of cholesterol feeding no significant effect of niceritrol was observed on the decrease in serum and liver cholesterol or on the concentration of cholesterol in inner aorta. When serum cholesterol had normalized 16 weeks after discontinuation of cholesterol feeding, addition of niceritrol to the diet for the following 16 weeks did not significantly affect the concentration of cholesterol in liver and inner aorta. Animals in all groups were injected intravenously with an equal amount of [3H] cholesterol 3 weeks before discontinuing cholesterol feeding. Niceritrol did not significantly affect the amount of accumulated labelled cholesterol in inner aorta. The present results indicated that niceritrol had no significant effects on metabolism of cholesterol in inner aorta of the hypercholesterolemic and previously hypercholesterolemic rabbits.     

Attenuation of the development of hypercholesterolemic atherosclerosis by thymoquinone

Thymoquinone (TQ), derived from Nigella sativa seed, is an antioxidant. The present study investigated whether TQ attenuates the development of atherosclerosis, and/or reduces the serum lipid levels and oxidative stress in rabbits. New Zealand white female rabbits were assigned to four groups of six animals each: group I, control; group II, 1% cholesterol diet; group III, 1% cholesterol plus TQ (10 mg/kg/day; through a nasogastric tube) diet; and group IV, 1% cholesterol plus TQ (20 mg/kg/day; through a nasogastric tube) diet. Blood samples were collected at baseline and after four and eight weeks on the experimental diets for measurement of serum lipids, total cholesterol (TC), triglycerides (TG), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), TC/HDL-C ratio and oxidative stress biomarkers (malondialdehyde [MDA] and protein carbonyls). At the end of the eight weeks, the aorta was removed for the assessment of atherosclerotic changes, MDA and protein carbonyls. Group II animals developed atherosclerosis (45%±11% of the intimal surface of aorta was covered with atherosclerotic plaques), which was associated with an increase in the serum TC, TG, LDL-C, HDL-C, TC/HDL-C, MDA and protein carbonyls. In group III, TQ decreased serum TC, LDL-C, MDA and protein carbonyls by 26%, 29%, 85% and 62%, respectively, and aortic MDA by 73%, which was associated with a 40% reduction of the development of aortic atherosclerosis. The higher dose of TQ in group IV had effects similar to the lower dose (group III), except that this dose further decreased serum TG. It is concluded that TQ attenuates hypercholesterolemic atherosclerosis and this effect is associated with a decrease in serum lipids and oxidative stress.     

Effects of anticalcifying and antifibrobrotic drugs on pre-established atherosclerosis in the rabbit.

The effects of the anticalcifying drug, ethane-hydroxydiphosphonate (EHDP) and the inhibitors of collagen biosynthesis, colchicine, penicillamine and azetidine were studied in the rabbit with pre-established atherosclerosis. The drugs were administered with a cholesterol-free diet (regression diet) for 8 weeks following the induction of atherosclerosis by feeding a hypercholesterolemic diet containing 2% cholesterol and 8% peanut oil for 8 weeks. The extent and severity of aortic atherosclerosis, as revealed by the morphological and biochemical findings, increased significantly during the regression period. In rabbits treated with EHDP (5 mg/kg/day) the aorta had fewer gross lesions and contained significantly less cholesterol, collagen and elastin than did the aorta of the rabbits fed the regression diet alone. These changes were associated with a significant reduction in aortic calcium caused by EHDP. The aortic content of cholesterol, collagen and elastin in the EHDP-treated rabbits, although less than that of the rabbits fed the regression diet alone, was about the same as that of the rabbits fed a high cholesterol diet for 8 weeks. Both colchicine (0.2 mg/kg/day) and penicillamine (100 mg/kg/day) had a selective action on the induced plaques in that they suppressed the fibrous proliferation in the lesions without preventing lipid and calcium accumulation in the lesions. Neither colchicine nor penicillamine reduced the extent of aortic atherosclerosis as determined by gross examination of the vessel. Azetidine had no significant effect on the pre-established atherosclerotic lesions. The lipid, fibrous protein and calcium content of the aorta of the azetidine-treated animals was not significantly different from that of the untreated animals. The biochemical findings in the aorta were consistent with the microscopic changes.     

阿托伐他汀对兔主动脉粥样硬化斑块和脂肪酸结合蛋白的抑制作用

目的观察阿托伐他汀对兔动脉粥样硬化斑块和血清脂肪细胞型脂肪酸结合蛋白(AFABP)的作用机制。方法 16只新西兰大白兔给予高TC饲料饲养8周后,随机分为高TC组(继续饲以高TC饲料4周)和阿托伐他汀组(在饲以高TC饲料的基础上给予阿托伐他汀2.5 mg·kg~(-1)·d~(-1)4周),每组8只。另选8只普通饲料饲养12周的新西兰大白兔作为对照组。分析观察前、8和12周兔血脂和AFABP水平的变化;12周末处死兔,取主动脉进行病理学检查;RT-PCR测定主动脉AFABP mRNA的表达。结果与高TC组比较,阿托伐他汀组兔12周时血清TC、LDL-C、AFABP水平和AFABP mRNA表达均明显降低(P0.01)。对照组、高TC组、阿托伐他汀组斑块/内膜面积比分别为0、(75.80±8.21)%和(46.11±3.56)%,差异显著(P0.01);内膜厚度分别为(4.12±0.29)μm、(74.18±10.25)μm和(39.45±5.68)μm;内膜/中膜比分别为0.05±0.01、0.85±0.31和0.48±0.23,差异显著(P0.01)。结论阿托伐他汀具有抗动脉粥样硬化作用,其降低兔血清AFABP水平及主动脉AFABP mRNA的表达可能是其作用机制之一。     

L-精氨酸对家兔动脉粥样硬化斑块形成及血脂的影响

为观察Ｌ－精氨酸对家兔动脉粥样硬化斑块形成及血脂的影响。将４５只新西兰白兔随机分为正常组,对照组和治疗组,正常组用标准饲料喂养,对照组用含２．５％胆固醇的标准饲料及普通饮水喂养,治疗组用含２．５％胆固醇的标准中料及含２．２５％Ｌ－精氨酸的普通饮水喂养,７周及１４周时检测血清总胆固醇及甘油三酯,同时用油经Ｏ将升主动脉及降主动脉染色,利用图像分析仪计算动脉粥样硬化斑块面积百分比。     

L-arg对高胆固醇血症兔血管反应性的影响

本研究观察ＮＯ前体物Ｌ－ａｒｇ的抗动脉粥样硬化作用机理。将１６只雄性新西兰白兔按体重随机分为３组：正常对照组（Ｄ组,ｎ＝５）,单纯胆固醇组（Ｃ组,ｎ＝６）和复合组（Ｌ组,ｎ＝５）。实验开始前及实验第５周和第１０周抽血检测血浆总胆固醇,第１０周处死动物,检测血浆和胸主动脉组织中内皮素－１（ＥＴ－１）、环－磷酸鸟苷（ｃＧＭＰ）含量,并测试了胸主动脉环对去甲肾上腺素（ＮＥ）的反应性。结果发现Ｌ－精氨酸对血浆总胆固醇无明显影响,但可使血浆及组织中ＥＴ－１含量显著下降,ｃＧＭＰ含量上升,补充ＮＯ前体物可改善胸主动脉环对缩血管物质去甲肾上腺素的反应性。由此可见,补充Ｌ－ａｒｇ可纠正高胆固醇引起的ＥＴ－１／ｃＧＭＰ失衡,具有一定的抗动脉粥样硬化作用。