Effects of certain micronutrients and melatonin on plasma lipid,lipid peroxidation,and homocysteine levels in rats

BACKGROUND: Numerous studies suggest an association between high intake of antioxidant vitamins and fish oil and reduced risk of coronary heart disease. Hyperhomocysteinemia has also been identified as an independent risk factor for arteriosclerosis. In this paper, we aimed to evaluate the effects of vitamin E, vitamin C, vitamin C 6 palmitate (VC6P), lipoic acid, fish oil, and melatonin supplementation on lipid peroxidation, plasma lipid, and homocysteine (Hcy) levels in rats. METHODS: Animals were divided into seven groups: one was used as control and each remaining group was supplemented with one substance for 6 weeks. All substances were dissolved in olive oil and injected intraperitoneally (i.p.) with the exception of vitamin C, which was dissolved in drinking water. Plasma Hcy, lipid peroxidation, and lipids were determined. RESULTS: Plasma malondialdehyde (MDA) levels decreased significantly in melatonin (p <0.01), lipoic acid (p <0.01), and vitamin E (p <0.05) groups. On the other hand, supplementation with vitamin C and VC6OP lowered MDA levels moderately but not significantly (p >0.05). Fish oil supplementation caused a slight but insignificant increase in plasma MDA levels (p >0.05). Plasma lipid levels in animals treated with melatonin, vitamin E, vitamin C, lipoic acid, and fish oil were significantly lower than those of controls; however, treatment of rats with VC6P has no significant effect on plasma lipid level. Melatonin and fish oil administration significantly lowered plasma Hcy levels, whereas VC6P elevated its level. There was no significant effect of vitamin E, vitamin C, and lipoic acid on levels of plasma Hcy. CONCLUSIONS: Our data suggest that supplementation with antioxidants appears to be hypolipidemic. In addition to these beneficial effects, administration of melatonin and fish oil deserves careful consideration as a measure to lower plasma Hcy levels and reduce risk of cardiovascular diseases.     

Hypercholesterolaemic effect of fish oil in insulin-dependent diabetic patients

The effect of the daily administration of Max EPA fish oil (equivalent to 2.7 g per day of eicosapentaenoic acid) on serum lipid levels was examined in insulin-dependent male diabetic patients with cholesterol levels of less than 6.5 mmol/L. After three weeks of fish-oil supplementation there was a significant rise in total cholesterol levels, which was due largely to increases in low-density lipoprotein (LDL)- and high-density lipoprotein (HDL)- cholesterol levels. The increase in HDL-cholesterol levels was accounted for by its HDL2 subclass. There was a decrease in serum triglyceride levels, but this was also observed in a control group of diabetic patients who did not receive fish oil and is probably explained by weight loss in this group. Similar changes in lipid levels were found in a subgroup of diabetic patients with retinopathy. The possible detrimental effect of the increase in total cholesterol and LDL-cholesterol levels after Max EPA fish oil at this dose may be offset by the selective rise in the protective HDL2 subclass.     

Effect of in vitro stability of dietary fish oil on lipid peroxidation and prostanoids in vivo

Dietary supplementation of rats with fish oil for 18 days resulted in signs of lipid peroxidation, with increased malondialdehyde production in plasma and myocardium. This increase in malondialdehyde could be completely prevented by supplementing the fish oil with a new natural antioxidant mixture (Pufanox) which is known to markedly increase the in vitro stability of fish oils. Addition of Pufanox to fish oil also tended to increase the ratio between the vasodilator prostacyclin and the vasoconstrictor thromboxane A2. The concentration of vitamin E decreased, both in plasma and in the heart after the period of fish oil ingestion, indicating that the fish oil used contained too little vitamin E. Plasma cholesterol and triglyceride levels decreased markedly after fish oil supplementation but with no apparent difference between fish oil with or without Pufanox, probably due to the insufficient content of vitamin E. The results obtained emphasize the importance both of the in vitro stability of the fish oil given and of the amount of vitamin E added.     

脑出血发病与血脂水平异常的关系研究

目的探讨脑出血与血脂水平异常之间关系。方法选择2010年1月-2012年6月在河北大学附属医院住院的脑出血患者91例作为研究组,并选择90例同期非脑血管病患者作为对照组,于入院第2天清晨空腹抽静脉血,选择检测血脂相关指标并进行统计分析。结果与对照组比较,研究组三酰甘油[（1.95±0.94）mmol/L]、载脂蛋白AI[（0.43±0.12）mmol/L]、高密度脂蛋白胆固醇[（1.78±0.84）mmol/L]、低密度脂蛋白胆固醇[（2.82±0.93）mmol/L]水平均高于对照组,差异有统计学意义（P〈0.05）,但研究组总胆固醇[（4.41±1.02）mmol/L]水平低于对照组,差异有统计学意义（P〈0.05）。结论血脂代谢异常与脑出血密切相关,高三酰甘油和低总胆固醇水平可能是脑血管病的危险因素。     

重度脂浊对间接离子选择电极法测定血清钠钾氯的干扰

目的：研究重度脂浊对间接离子选择电极法测定血清钠钾氯的干扰。方法：按照NCCLS推荐的EP7-A2和EP9-A2方案,选取温州医科大学附属第二医院40份无脂浊住院患者血清样本,分别采用间接离子选择电极法（西门子ADVIA 2400全自动生化分析仪）和直接离子选择电极法（强生VITROS 5600干化学分析仪）测定血清钠钾氯;再选取40份不同脂浊指数住院患者血清样本,分别用这2种方法测定血清钠钾氯;分别留取高、中、低不同浓度水平的血清钠钾氯患者样本设计体外干扰试验。结果：2种方法检测无脂浊血清的钠钾氯结果差异无统计学意义（P＞0.05）;直接法测定的脂浊血清钠、钾和氯结果明显高于间接法（P＜0.05）;体外干扰试验显示,甘油三酯浓度＞35.3 mmol/L,脂浊指数＞965时,间接法测定的血清钠水平位于113 mmol/L时存在明显负干扰（偏移＞-2%）;甘油三酯浓度＞28.4 mmol/L,脂浊指数＞710时,间接法测定的血清钾水平位于5.8 mmol/L时存在明显负干扰（偏移＞-3%）;甘油三酯浓度＞20 mmol/L,脂浊指数＞615时,间接法测定的血清氯水平位于79.6 mmol/L时存在明显负干扰（偏移＞-2.5%）。结论：脂浊对间接离子选择电极法测定血清钠钾氯均存在负干扰,重度脂浊血清的钠钾氯检测以直接法的检测结果为准,也可以使用高速离心去除脂质后,再采用间接法测定。     

海南琼海地区健康成人血脂水平的正常参考值调查

目的 了解海南省琼海地区健康成人血脂水平,制订临床血脂参考值范围.方法 抽查琼海地区健康成人1 206例,空腹采血,分离血清,应用日本岛津CL-8000全自动生化分析仪检测血清总胆固醇(TC)、甘油三酯(TG),按不同性别进行统计分析.结果 1 187例的TC、TG呈正态分布,TC、TG男性高于女性,不同性别之间有显著性差异(P＜0.05.本次调查的血脂水平(mmol/L)男性:TC:(4.52±1.96)mmol/L,TG:(1.25±0.90)mmol/L;女性:TC:(4.34±2.00)mmol/L,TG:(1.19±0.98) mmol/L.结论 初步得到该地区不同性别的血脂水平概貌,建立了较合理的地区性血脂参考范围.     

Lipids and lipoproteins in patients undergoing coronary-artery surgery

Fasting blood samples were obtained from 290 patients who were undergoing elective coronary-artery graft procedures, and cholesterol, triglyceride and high-density lipoprotein cholesterol levels were measured. The 1983 National Heart Foundation of Australia's Risk Factor Prevalence Study was used as a source of age- and sex-matched "control" data. Of these patients, 80% had cholesterol levels of greater than 5.5 mmol/L; in 55% of patients, the level exceeded 6.5 mmol/L. Only 4% of patients who received a graft showed hypertriglyceridaemia alone (triglyceride level, greater than 2 mmol/L). Combined hyperlipidaemia (cholesterol level, greater than 5.5 mmol/L and triglyceride level, greater than 2.0 mmol/L) was present in 52% of subjects. Low-density lipoprotein cholesterol levels exceeded 3.5 mmol/L in 69% of men and in 71% of women. In terms of five 10-year age intervals, mean plasma triglyceride and cholesterol levels were elevated significantly in patients who had undergone a coronary-artery grafting procedure compared with those of subjects in the National Heart Foundation study. The mean high-density lipoprotein cholesterol levels were markedly-lower compared with those of the subjects in the National Heart Foundation study. Of those patients whose plasma cholesterol levels were less than 5.5 mmol/L, 97% of patients had high-density lipoprotein cholesterol levels that were less than the mean level for subjects in the National Heart Foundation study. Thus, a very-high proportion of patients who underwent coronary-artery bypass surgery had lipid abnormalities which required intervention postoperatively.     

松花粉超临界二氧化碳萃取物降血脂功能实验研究

目的 研究松花粉超临界CO2萃取物对高血脂患者血脂的影响.方法 实验选择100例高血脂症患者为受试者,其血清总胆固醇(TC)≥6.5 mmol/L或血清三酰甘油(TG)≥2.26 mmol/L,按血脂水平、年龄、性别等随机分为试食组和对照组两组,其中试食组50例,对照组50例,采用双盲随机分组、组间和自身两种对照设计,试食期间保持平常的生活和饮食习惯,试食组服用松花粉超临界CO2萃取物,对照组服用安慰剂,每日2次,每次2粒,连续给样30 d后,取血测定血清总胆固醇(TC)、三酰甘油(TG)、低密度脂蛋白(LDL-C)和高密度脂蛋白(HDL-C)等指标,并观察试验期间产生的不良反应.结果 松花粉超临界CO2萃取物能明显降低血清总胆固醇(TC)、三酰甘油(TG)和低密度脂蛋白(LDL-C)(P<0.05),有提高血液中高密度脂蛋白水平的趋势,但差异不显著,其总有效率为70.00%,与对照组(8.00%)比较,差异有显著性(P<0.05),而且在试验中没有产生不良反应.结论 松花粉超临界CO2萃取物具有辅助降血脂作用,并对高血脂症患者安全,值得开发应用.     

Postnatal evaluation of vitamin D and bone health in women who were vitamin D-deficient in pregnancy, and in their infants

OBJECTIVE: To determine the postnatal vitamin D status and bone health of women identified as vitamin D-deficient in pregnancy, and of their infants. DESIGN AND PARTICIPANTS: Retrospective audit conducted between 27 August and 5 November 2003. The study included women delivering between August and October 2002 at the Royal Women's Hospital, Melbourne, who had had a 25-hydroxyvitamin D (25-[OH]D) level < 30 nmol/L in pregnancy, and their infants at age 4-10 months. SETTING: The outpatient clinic at the Royal Children's Hospital, Melbourne. MAIN OUTCOME MEASURES: Maternal and infant serum levels of vitamin D, total alkaline phosphatase (tALP), parathyroid hormone (PTH), calcium and phosphorus; x-ray results in children with clinical or laboratory findings suggestive of rickets. RESULTS: Of 69 mother-infant pairs invited to participate, 47 (68%) attended. All 47 women had 25-(OH)D levels < 50 nmol/L, and 39 (83%) had levels < 30 nmol/L. Vitamin D supplements had been prescribed in pregnancy for 35 women (74%), and 19/35 reported having taken them as prescribed. None had continued to take supplements postnatally, but one had recently started taking them again. Among 45 infants from whom blood samples were successfully obtained, 18 (40%) had 25-(OH)D levels < 50 nmol/L, and 14 (31%) had levels < 30 nmol/L. Twelve of 16 breastfed infants had 25-(OH)D levels < 30 nmol/L, compared with 2/29 fed formula milk (P = 0.001). CONCLUSIONS: Most mothers who had been vitamin D-deficient in pregnancy were also deficient postnatally, indicating that treatment offered, counselling and/or treatment compliance were inadequate. Their infants, especially if breastfed, were at high risk of vitamin D deficiency and increased bone formation. Breastfed infants of mothers at high risk of vitamin D deficiency should receive vitamin D supplements.     

Diabetes control and complications in public hospitals in Malaysia

The Diabcare-Asia project was initiated to study the status of diabetes care and prevalence of diabetic complications in Asia and this study was done to evaluate the above in public hospitals in Malaysia and compare to a similar study done in 1998. A total of 19 public hospitals participated in this study from which a total of 1099 patients were included and analysed. The majority of patients (94.8%) had type 2 diabetes mellitus and 66.5% were overweight or obese. As for glycaemic control only 41.0% of the patients had HbA1c < 7% and 18% had FPG < 6.1 mmol/L. As for lipid levels, only 32.0% of the patients had total cholesterol < 4.8 mmol/L; 59.6% had HDL-cholesterol > 1.1 mmol/L and 51.1% had triglycerides < 1.7 mmol/L. Despite the high proportion of patients having dyslipidaemia, only 52.8% of the patients were on lipid lowering therapy. As for blood pressure, 15.0% of the patients had blood pressure < 130/80 mmHg. Although 75.9% of the patients were on antihypertensive medication only 11.3% had blood pressure < 130/80 mmHg. Only 54.8% of patients admitted to adhering to a diabetic diet regularly and 38.9% exercised regularly. As for glucose monitoring, only 26.8% of the patients did home blood glucose monitoring and 1.8% did home urine glucose testing. There was also a high complication rate with the commonest being neuropathy (19.0%) followed by albuminuria (15.7%), background retinopathy (11.1%) and microalbuminuria (6.6%). Compared to the 1998 study, there was some improvement in the percentage of patients achieving target levels and a reduction in the prevalence of complications. In conclusion, the majority of diabetic patients treated at the public hospitals were still not satisfactorily controlled and this was still associated with a high prevalence of complications. There is still an urgent need to educate both patients and health care personnel on the importance of achieving the clinical targets and greater effort must be made to achieve these targets.     

不同剂量维生素 D 对早产儿钙磷代谢影响的研究

目的探讨不同剂量维生素D对早产儿钙磷代谢的影响。方法选取2015年2月~2016年2月本院入住的100例早产儿,按照随机数字表法分为高剂量组与低剂量组各50例,在早产儿10日龄时对高剂量组每天给予口服800 U维生素D,对低剂量组每天给予口服400 U维生素D。在20日龄、40日龄时检测早产儿血清中钙、磷和25-羟维生素D的含量。结果 20日龄高剂量组早产儿的钙、磷、25-羟维生素D水平为(2.42±0.12)mmol/L、(1.82±0.53)mmol/L、(45.56±12.45)nmol/L,明显高于低剂量组的(2.03±0.13)mmol/L、(1.71±0.59)mmol/L、(42.51±9.27)nmol/L(P0.05);40日龄高剂量组早产儿的钙、磷、25-羟维生素D水平为(2.56±0.14)mmol/L、(1.96±0.23)mmol/L、(73.46±18.57)nmol/L,与40日龄低剂量组的(2.12±0.21)mmol/L、(1.81±0.39)mmol/L、(64.48±15.37)nmol/L比较,差异有统计学意义(P0.05)。结论维生素D能改善早产儿钙磷代谢状态,800 U效果优于400 U。     

Guidelines for the detection of high-risk lipoprotein profiles and the treatment of dyslipoproteinemias. Canadian Lipoprotein Conference Ad Hoc Committee on Guidelines for Dyslipoproteinemias.

Elevated plasma levels of cholesterol and triglycerides, low levels of high-density lipoproteins, hypertension, diabetes mellitus, smoking and abdominal obesity are risk factors for coronary heart disease (CHD) and stroke. Because of the preventable threat to life, well-being and productivity from perturbations of plasma lipoproteins (which affect about 60% of adults), we recommend a population-based strategy with public education on diet, exercise and the hazards of smoking and legislation for better food labelling. This should be combined with the medical guidelines we describe to detect and treat those at highest risk for CHD (including about 15% of adults), who merit priority for the medical, dietetic and laboratory services required. Among people aged 40 years or more this includes those with plasma total cholesterol levels greater than 7 mmol/L, fasting triglyceride levels greater than 3 mmol/L or cholesterol level greater than 6 mmol/L when associated with CHD or other risk factors for CHD. For younger people the criteria for highest risk include cholesterol levels greater than 6.5 mmol/L for those aged 30 to 39 years, greater than 6 mmol/L for those aged 20 to 29 and greater than 5 mmol/L for those under age 20.     

男性血清尿酸水平与血脂及其部分比值的相关性

目的 研究成年男性血清尿酸(UA)水平与血脂各组分及部分比值的相关性.方法 纳入武汉大学人民医院2016年4~8月男性体检者1164例,按年龄、尿酸水平分组,其中652例为随机样本,512例为健康对照组,检测各组血清UA、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)、小而密低密度脂蛋白胆固醇(sdLDL-C)水平,并计算sdLDL-C/HDL-C、TC/HDL-C值,进行统计学分析.结果 男性血清UA、sdLDL-C水平及sdLDL-C/HDL-C与TC、TG、HDL-C、LDL-C、sdLDL-C、TC/HDL-C在置信度(双侧)为0.01时均显著相关;成年男性血清UA水平分布:20~40岁为361.00μmol/L(330.75~394.00μmol/L);41~60岁为355.00μmol/L(319.00~395.00μmol/L);61~80岁为367.00μmol/L(323.00~406.00μmol/L);高UA组血清各项指标分布:TC为4.6700 mmol/L(4.2100~5.3700 mmol/L),TG为1.6800 mmol/L(1.2400~2.4800 mmol/L),HDL-C为1.0600 mmol/L(0.9200~1.2200 mmol/L),LDL-C为2.6700 mmol/L(2.2300~3.1200 mmol/L),sdLDL-C为0.9700 mmol/L(0.6900~1.2900 mmol/L),TC/HDL-C为4.4537(3.7958~5.0617),sdLDL-C/HDL-C为0.9058(0.6438~1.2113);高UA组与正常对照组比较,血清TC、TG、HDL-C、LDL-C、sdLDL-C、sdLDL-C/HDL-C、TC/HDL-C差异均有统计学意义(P<0.05);男性20~40岁人群血清UA、HDL-C、TG、sdLDL-C水平与正常对照组比较差异有统计学意义(P<0.05),血清TC、LDL-C水平差异无统计学意义(P>0.05).结论 成年男性血清尿酸水平与血脂水平密切相关;20~40岁男性总体血清尿酸及血脂水平已显著偏离正常水平;sdLDL-C/HDL-C对评价体内血脂代谢情况有一定的临床价值.     

精神分裂症病人维生素D缺乏与血脂异常的相关性研究

目的:探讨精神分裂症病人维生素D（VitD）状态与血脂水平的关系。方法:收集229例精神分裂症病人进行问卷调查,包括一般社会人口统计学特征和近1个月生活行为方式。并抽取空腹静脉血,检测25-羟基维生素D[25（OH）D）]、总胆固醇（TC）、三酰甘油（TG）和高密度脂蛋白（HDL-C）的水平。采用χ2检验和logistic回归分析VitD与血脂异常的关系。结果:精神分裂症病人25（OH）D、TC、TG和HDL-C的平均水平分别为（45.9±21.3）nmol/L、（4.1±0.8）mmol/L、（1.2±0.7）mmol/L和（1.2±0.3）mmol/L。VitD缺乏率为60.3%。TC、TG和HDL-C异常率分别为10.9%、15.7%和34.1%。控制混杂因素后的多因素logistic回归分析显示,与VitD非缺乏组相比,VitD缺乏组TG异常风险（调整后OR=2.80,95%CI 1.21~6.46）和HDL-C异常风险（调整后OR=2.48,95%CI 1.35~4.56）均显著增加。结论:精神分裂症病人VitD缺乏可能与血脂代谢异常存在关联。     

Effect of fish oils containing different amounts of EPA,DHA, and antioxidants on plasma and brain fatty acids and brain nitric oxide synthase activity in rats

Abstract

Background. The interest in n-3 polyunsaturated fatty acids (PUFAs) has expanded significantly in the last few years, due to their many positive effects described. Consequently, the interest in fish oil supplementation has also increased, and many different types of fish oil supplements can be found on the market. Also, it is well known that these types of fatty acids are very easily oxidized, and that stability among supplements varies greatly.

Aims of the study. In this pilot study we investigated the effects of two different types of natural fish oils containing different amounts of the n-3 PUFAs eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) and antioxidants on plasma and brain fatty acids, blood lipids, vitamin E, and in vivo lipid peroxidation, as well as brain nitric oxide synthase (NOS) activity, an enzyme which has been shown to be important for memory and learning ability.

Methods. Sprague-Dawley rats were divided into four groups and fed regular rat chow pellets enriched with 5% (w/w) of butter (control group), a natural fish oil (17.4% EPA and 11.7% DHA, referred to as EPA-rich), and a natural fish oil rich in DHA (7.7% EPA and 28.0% DHA, referred to as DHA-rich). Both of the fish oils were stabilized by a commercial antioxidant protection system (Pufanox^®) at production. The fourth group received the same DHA-rich oil, but without Pufanox^® stabilization (referred to as unstable). As an index of stability of the oils, their peroxide values were repeatedly measured during 9 weeks. The dietary treatments continued until sacrifice, after 10 days.

Results. Stability of the oils varied greatly. It took the two stabilized oils 9 weeks to reach the same peroxide value as the unstable oil reached after only a few days. Both the stabilized EPA- and DHA-rich diets lowered the triacylglycerols and total cholesterol compared to control (-45%, P < 0.05 and -54%, P < 0.001; -31%, P < 0.05 and -25%, P < 0.01) and so did the unstable oil, but less efficiently. Only the unstable oil increased in vivo lipid peroxidation significantly compared to control (+40%, P < 0.001). Most of the fatty acids in the plasma phospholipids were significantly affected by both the EPA- and DHA-rich diets compared to control, reflecting their specific fatty acid pattern. The unstable oil diet resulted in smaller changes, especially in n-3 PUFAs. In the brain phospholipids the changes were less pronounced, and only the diet enriched with the stabilized DHA-rich oil resulted in a significantly greater incorporation of DHA (+13%, P < 0.01), as well as total n-3 PUFAs (+13%, P < 0.01) compared to control. Only the stabilized DHA-rich oil increased the brain NOS activity (+33%, P < 0.01).

Conclusions. Both the EPA- and DHA-rich diets affected the blood lipids in a similarly positive manner, and they both had a large impact on plasma phospholipid fatty acids. It was only the unstable oil that increased in vivo lipid peroxidation. However, the intake of DHA was more important than that of EPA for brain phospholipid DHA enrichment and brain NOS activity, and the stability of the fish oil was also important for these effects.     

颈动脉粥样硬化斑块超声联合血脂指标对心血管疾病的预测价值评估

目的 探讨颈动脉粥样硬化斑块超声联合血脂指标对心血管疾病的预测价值评估。方法 选取2019年1月—2021年12月在蚌埠医学院第一附属医院确诊为颈动脉斑块的59例体检者作为观察组,选取同期59名健康体检者作为对照组,所有受试者均行颈动脉超声检查和血脂水平测定。结果 观察组的颈动脉内中膜厚度(IMT)值为(1.58±0.34)mm,其与对照组IMT值[(0.76±0.12)mm]相比明显更高,差异有统计学意义(P<0.05);观察组的LDL-C值和HDL-C值分别为(3.09±1.01)mmol/L和(1.18±0.37)mmol/L,其与对照组相对应的LDL-C值[(2.67±0.68)mmol/L和HDL-C值(1.33±0.32)mmol/L]相比,前者显著升高而后者显著降低,且差异有统计学意义(均P<0.05);观察组的TC值[(4.94±1.18)mmol/L]和TG值[(1.85±0.67)mmol/L]与对照组[(4.69±0.76)mmol/L、(1.71±0.92)mmol/L]相比虽有一定的升高,但差异均无统计学意义(均P>0.05)。结论 心脑血管...     

牙周基础治疗对非酒精性脂肪性肝病伴牙周炎患者肝功能及血脂水平的影响

  目的  评估牙周基础治疗对非酒精性脂肪性肝病(non-alcoholic fatty liver disease, NAFLD)伴牙周炎患者肝功能及血脂的影响。  方法  选择2018年7月—2019年6月杭州师范大学附属医院牙周科就诊的30例NAFLD伴中重度牙周炎患者,对入组患者进行牙周基础治疗,在治疗前和治疗后3个月分别对牙周临床指标、肝功能水平及血脂进行检测,治疗前后的数据对比采用配对t检验。  结果  与牙周基础治疗前相比,治疗后3个月牙周探诊深度从(3.76±0.46)mm下降至(2.30±0.37)mm,临床附着水平从(4.90±0.48)mm下降至(3.90±0.49)mm,全口探诊出血位点百分比从(88.93±5.05)%下降至(20.47±5.98)%;同时,丙氨酸氨基转移酶从(61.60±12.07)U/L下降至(45.82±11.82)U/L,天冬氨酸氨基转移酶从(54.71±11.20)U/L下降至(44.87±11.36)U/L;此外,总胆固醇从(5.63±0.24)mmol/L降低为(5.23±0.24)mmol/L,三酰甘油从(1.90±0.10)mmol/L下降至(1.63±0.13)mmol/L,低密度脂蛋白从(2.78±0.30)mmol/L降至(1.78±0.43)mmol/L,高密度脂蛋白从(1.25±0.05)mmol/L升高至(1.39±0.06)mmol/L,治疗前后差异均有统计学意义(均P＜0.001)。  结论  NAFLD伴牙周炎患者经过牙周基础治疗可获得良好的临床疗效,不仅牙周状态明显好转,同时也改善了患者的肝功能和血脂水平,牙周基础治疗可能是NAFLD伴牙周炎患者的治疗管理途径之一。      

维生素E对不同糖浓度培养LO2细胞铁代谢相关蛋白表达的影响

目的探讨维生素E对不同浓度葡萄糖培养下LO2肝细胞株铁调节蛋白1(IRP1)、转铁蛋白受体1(TfR1)、转铁蛋白受体2(TfR2)、铁调素(hepcidin)表达的影响。方法 LO2细胞培养基分为5.5,15,25 mmol/L三种葡萄糖浓度。分别在这三种葡萄糖浓度培养中,再分别加入0,0.1,1 mg/L和10 mg/L维生素E。其中0 mg/L维生素E剂量组作为相同葡萄糖浓度组中的对照组。各组培养时间均为24 h。用荧光染色法检测各组细胞活性氧(ROS)水平,用蛋白免疫印迹法检测IRP1、TfR1、TfR2、hepcidin的表达量。结果①相同葡萄糖浓度组与0 mg/L维生素E对照组相比,5.5 mmol/L组添加各剂量维生素E后细胞ROS水平、IRP1、TfR1和TfR2表达没有显著差异(P>0.05);15 mmol/L组和25 mmol/L组中1 mg/L和10 mg/L维生素E组分别与其对照组相比,细胞ROS水平、IRP1、TfR1和TfR2表达分别下降(P<0.01);15 mmol/L和25 mmol/L组中0.1 mg/L维生素E组与相应对照组相比细胞ROS水平、IRP1、TfR1和TfR2表达没有显著差异(P>0.05)。②相同剂量维生素E组内:LO2细胞ROS水平、IRP1、TfR1、TfR2表达量分别随葡萄糖浓度的升高而逐渐升高(P<0.01)。③在各葡萄糖浓度组内,各剂量维生素E组间细胞的hepcidin表达没有显著性差异(P>0.05)。在各剂量维生素E组中,15 mmol/L和25mmol/L葡萄糖组与相应5.5 mmol/L葡萄糖组相比,hepcidin表达显著升高(P<0.01),而15 mmol/L和25 mmol/L组间hep-cidin表达没有显著差异(P>0.05)。结论维生素E能够降低高糖培养下细胞活性氧的含量,缓解IRP1、TfR1、TfR2蛋白表达增加的幅度。hepcidin表达变化并没有受维生素E的影响,提示hepcidin在高糖环境下的表达增加可能不是或不仅仅是受过量ROS的影响。     

胰岛素抵抗与冠心病关系的初步探讨

本文测定了２０例冠心病患者和１９例正常人葡萄糖耐量（ＯＧＴＴ）时胰岛素和血糖水平。冠心病组ＯＧＴＴ的１、２、３ｈ血清胰岛素为４９．１±１８．９ｍＩＵ／Ｌ、４６．３±１６．４ｍＩＵ／Ｌ３９．６±１５．９ｍＩＵ／Ｌ胰岛素／血糖（ｍＩＵ／ｍｍｏｌ）比值分别为５．１±１．３、５．８±１．１、７．３±１．４，结果均明显高于正常对照组（Ｐ＜０．０１）。表明冠心病组病人存在高胰岛素血症和胰岛素抵抗（ＩＲ）。同时，冠心病组总胆固醇、甘油三酯分别为６．１２±１．８２ｍｍｏｌ／Ｌ、２．４４±１．０６ｍｍｏｌ／Ｌ，均显著高于对照组（Ｐ＜０．０１、Ｐ＜０．０５），提示胰岛素抵抗可能导致脂质代谢紊乱，进而引起冠心病。     

血脂平稳度对兔动脉粥样硬化病变进展的影响

目的探讨血脂平稳度对兔动脉粥样硬化病变进展的影响。方法 24只雄性新西兰大耳兔随机分为3组,空白组（A）6只,对照组（B）9只,血脂波动组（C）9只,A组给予普通饲料,B组持续高脂饲料喂养,C组高脂饲料喂养至12周后与低脂饲料每隔3周交替喂养1次,共喂养24周。分别于0周、12周更换高低脂饲料时测定血脂及hs-CRP水平,并行腹主动脉超声检查。观察主动脉病理学改变并分析病变程度。结果 12周时,血清TC、TG、LDL-C及hs-CRP水平,B组分别为（37.36±1.82）mmol/L、（2.30±1.46）mmol/L、（40.33±2.32）mmol/L、（0.40±0.10）mg/dl,C组为（34.96±6.98）mmol/L、（1.48±0.82）mmol/L、（34.65±7.94）mmol/L、（0.45±0.11）mg/dl,均较A组（0.78±0.24）mmol/L、（0.61±0.44）mmol/L、（0.27±0.13）mmol/L、（0.17±0.04）mg/dl显著升高（P〈0.01）。24周时,C组TC、LDL-C的SI值（3.60、3.29）明显低于B组（12.51、7.61）,B、C组血清TC、TG、LDL-C、hs-CRP水平升高的同时,C组hs-CRP水平（0.53±0.07）mg/dl较B组（0.45±0.06）mg/dl升高（P〈0.05）。12周时B、C组腹主动脉内-中膜厚度（intima-media thickness,IMT）（0.70±0.11、0.84±0.14）mm均高于A组（0.40±0.01）mm,24周时C组IMT（1.10±0.21）mm高于B组（0.77±0.11）mm。B、C组主动脉内膜可见典型动脉粥样斑块,C组斑块面积百分比（53.53±22.6）%较B组（33.90±24.91）%高,但斑块纤维帽厚度（103.50±45.66）μm较B组（295.83±97.90）μm薄（P〈0.01）,光镜下可见纤维帽不连续。结论血脂平稳度与动脉粥样硬化病变的进展相关,血脂平稳指数越小斑块发展速度越快,其发生机制可能与炎症反应加重有关。