Effects of Red Palm Oil on Serum Lipids and Plasma Carotenoids Level in Chinese Male Adults

Objective Effects of red palm oil on major plasma carotenoids, tocopherol, retinol and serum lipids were evaluated when used in Chinese diet. Methods Red palm oil group (RPO) composed of 20 male subjects(aged 18-32) and soybean oil group (SBO) composed of 22 male subjects (aged 18-32). Dietary fat provided about 28% of total calories, and the test oil accounted for about 60% of total dietary fat. In the 3 weeks of pretest period, diets were prepared with soybean oil, and then in the next 6 weeks subjects in each group consumed the diet prepared by test oil. Results Plasma α-carotene, β-carotene and lycopene concentration of RPO group significantly increased at the time of interim (21 days) and of the end (42 days) (P<0.05), and α-tocopherol concentration significantly increased at the time of the end (42 days) in this study. Though Chinese plasma retinol level was relatively low when compared with that of Westerners, red palm oil diet showed no significant effect on adult Chinese plasma retinol level. Serum concentration of total cholesterol, triglyceride, high density lipoprotein cholesterol, apolipoprotein AI and apolipoprotein B of all subjects showed no significant changes in RPO group during the study. Conclusions The data in our study suggest that red palm oil is a good source of carotenoids and vitamin E when used in Chinese diet preparation, and it can significantly increase plasma concentration of a-carotene, α-carotene, lycopene and β-tocopherol.

Relieving the Impacts of Oral Contraceptives on Lipids Profile by Taking Pills in a Novel Scheme

Objective To explore whether the changes on lipids profile induced by oral contraceptives could be reduced through alternatively administering two oral contraceptives of different formulations (either predominant in progestogen or estrogen) Materials &. Methods A total of 59 women aged 25- 45 were divided into two treatment groups.The subjects in Group A received oral contraceptive A (Oc A: NET 0. 600 mg + EE 0. 035 mg) and B (OcB: LNG 0. 15mg + EEO. 03 mg) alternatively during 12 treatment cycles. Each contraceptive was administrated for three cycles consecutively with starting from OcA. The subjects in the B group received OcB only during 12 treatment cycles. Fasting blood were drawn before treatment, at the end of each trimester treatment and at the end of one cycle after stopping treatment respectively. The concentrations of lipids and apolipoproteins were measured.Results OcA increased the levels of triglyceride(TG) , total cholesterol (TC), high density lipoprotein-cholesterol(HDL-c) , and apolipoprotein AI (apo AI) with statistical significance, whereas OcB significantly decreased all parameters above. As compared with the control group, the overall mean of variation in the study group was much less than that of the control group.Conclusion It indicates that the impacts of oral contraceptives on lipids profile could be moderated by means of alternatively administering Ocs of two different formulations , with estrogen-dominant or progestogen-dominant.

Impact of apolipoprotein E isoforms on sporadic Alzheimer's disease:beyond the role of amyloid beta

The impact of apolipoprotein E(ApoE)isoforms on sporadic Alzheimer's disease has long been studied;however,the influences of apolipoprotein E gene(APOE)on healthy and pathological human brains are not fully understood.ApoE exists as three common isoforms(ApoE2,ApoE3,and ApoE4),which differ in two amino acid residues.Traditionally,ApoE binds cholesterol and phospholipids and ApoE isoforms display diffe rent affinities for their receptors,lipids transport and distribution in the brain and periphery.The role of ApoE in the human depends on ApoE isoforms,brain regions,aging,and neural injury.APOE E4 is the strongest genetic risk factor for sporadic Alzheimer's disease,considering its role in influencing amyloid-beta metabolism.The exact mechanisms by which APOE gene variants may increase or decrease Alzheimer's disease risk are not fully understood,but APOE was also known to affect directly and indirectly tau-mediated neurodegeneration,lipids metabolism,neurovascular unit,and microglial function.Consistent with the biological function of ApoE,ApoE4 isoform significantly alte red signaling pathways associated with cholesterol homeostasis,transport,and myelination.Also,the rare protective APOE variants confirm that ApoE plays an important role in Alzheimer's disease pathogenesis.The objectives of the present mini-review were to describe classical and new roles of various ApoE isoforms in Alzheimer's disease pathophysiology beyond the deposition of amyloid-beta and to establish a functional link between APOE,brain function,and memory,from a molecular to a clinical level.APOE genotype also exerted a heterogeneous effect on clinical Alzheimer's disease phenotype and its outcomes.Not only in learning and memory but also in neuro psychiatric symptoms that occur in a premorbid condition.Cla rifying the relationships between Alzheimer's disease-related pathology with neuropsychiatric symptoms,particularly suicidal ideation in Alzheimer's disease patients,may be useful for elucidating also the underlying pathophysiological process and its prognosis.Also,the effects of anti-amyloid-beta drugs,recently approved for the treatment of Alzheimer's disease,could be influenced by the APOE genotype.

A study of apolipoprotein A-IV genetic polymorphism,serum lipids and lipoproteins in Beijing habitants

Objective Apolipoprotein (apo) A IV genetic polymorphism and its effect on serum lipids, apoA I and apoA IV were investigated in order to clarify the role of apoA IV gene during the development of hyperlipidemia. Methods Results In Group Ⅰ, frequencies of the alleles were 0.648 and 0.352 in codon 127; 0.972 and 0.028 in codon 167;0.817 and 0.183 in codon 347. Two common alleles were 0.941 and 0.059 in codon 360. The results indicated that cases of codon 127 heterozygotes had a significantly higher serum TC level and cases of apoA IV Ser127 homozygotes kept a markedly low TG level. Both homozygotes and heterozygotes which carried apoA IV His 360 exhibited a significantly higher concentration of TC in comparing with that of apoA IV Gln 360 homozygotes. The data from Group Ⅱ showed that the allele frequency of His 360 had a significant difference between patients and controls. Conclusions Certain polymorphic sites of apoA IV gene might influence the serum lipid levels in both healthy persons and hyperlipidemic patients. His 360 polymorphic position might have a relationship with the development of hyperlipidemia.

A HUMAN APOLIPOPROTEIN AI-LIKE PROTEIN SECRETED BY YEAST

It has been suggested by many researchers that the dangers of developing atheroclerosis and the coronary heart disease in human race are closely correlated with the amount of high density lipoproteins in plasma. High density lipoprotein is capable of delivering cholesterol from the peripheral tissues to the liver for disposal and therefore prevent the accumulation of cholesterol in the artery wall. Apolipoprotein AI (apoAI) is the major polypeptide of high density lipoproteins and seems to play an important role in this cholesterol transport.

Interaction of alcohol and the G to a substitution at the promoter region of the apolipoprotein AI gene in deter mining plasma apolipoprotein AI levels in Yiand Han Chinese

To investigate the influence on plasma lipid levels of alcohol and a common polymorphism in the human apolipoprotein AI gene promoter at a position 75?bp upstream of the transcription start site Methods For this study, 742 healthy Yi and Han subjects all above 15 years old formed the total population which was divided into three groups: the Yi farmer group, the Yi emigrant group and the Han resident group All estimates of plasma lipids and apolipoproteins were performed using an auto analyzer Genetic DNA was prepared from the blood clots using the Triton X 100 lysis technique Amplification of a 432?bp fragment of the apoAI gene promoter was performed using PCR followed by restriction digestion, electrophoresis and identification of the genotypes involved Results The samples were divided on the basis of alcohol consumption: non drinkers, 1-25?g/day, 26-75?g/day and >75?g/day Comparing the four alcohol consumption groups, plasma HDLC and apoAI levels were increased as the alcohol consumption increased with no evidence of threshold effects in the Yi farmers and the Han people groups A similar association was found in the Yi emigrant group, but was not statistically significant The frequencies of the A allele in the three populations were similar, and no significant difference of lipid and apolipoprotein levels was found between subjects with and without the A allele in the three populations But, in Han and Yi emigrant samples, the drinkers with the GG genotype had higher plasma HDLC and apoAI levels than non drinkers with the same genotype, while the drinkers with the A allele had lower plasma HDLC and apoAI levels than drinkers without the A allele Non drinkers with the A allele had higher levels of apoAI than non drinkers with GG genotypes It was estimated that 18% of the variability of plasma apoAI level could be explained by the G to A polymorphism in non drinkers of Yi emigrants ( F =8 94, P <0 01) Conclusions The present data suggest that moderate alcohol consumption and the G to A substitution could lower the risk of coronary heart disease (CHD), but the beneficial effects of one will be negated by the other

子宫内膜癌患者术前血清apo AI和Apelin水平检测对预测淋巴脉管间隙浸润风险的价值研究

目的分析子宫内膜癌(endometrial cancer,EC)患者术前血清载脂蛋白AI(apolipoprotein A1,apo AI)和Apelin水平检测对预测子宫内膜癌淋巴结脉管间隙浸润(lymph vascular space invasion,LVSI)风险的价值。方法选取2020年2月~2022年6月石家庄市妇幼保健院97例EC患者为研究对象,统计EC患者LVSI发生情况并比较不同结果患者的一般资料,采用Logistic回归分析EC患者LVSI风险的影响因素,采用ROC分析术前血清apo AI和Apelin水平评估EC患者LVSI风险的价值,绘制决策曲线分析术前血清apo AI和Apelin水平评估EC患者LVSI风险的净受益率,比较血清apo AI和Apelin术前不同表达水平的患者LVSI发生情况。结果97例EC患者中LVSI阴性和阳性分别为69例和28例;Logistic回归分析显示,肿瘤≥2 cm、非子宫内膜样腺癌、低分化、肌层浸润≥1/2和血清Apelin水平升高是EC患者LVSI阳性的独立危险因素,血清apo AI升高是LVSI阳性的保护因素(t/χ2=6.592,8.686,4.697,9.098,4.001,2.738均P<0.05);ROC曲线分析显示术前血清apo AI,Apelin联合检测评估EC患者LVSI风险的AUC值为0.801,高于二者单独评估的AUC值(P<0.001);决策曲线分析显示当风险阈值为0~0.55时,术前血清apo AI,Apelin联合检测的净受益率大于单独检测。结论术前血清apo AI,Apelin水平变化对评估EC患者LVSI风险具有一定预测价值。低水平apo AI与高水平Apelin表明患者LVSI风险较高。

Apolipoprotein AI gene polymorphisms and risk for coronary artery disease in Chinese Xinjiang Uygur and Han population

Objective To analyze the relationship between polymorphism at the Apolipoprotein AI (Apo AI) gene and the risk for coronary artery disease. Methods A total of 107 patients (mean age 56 ±11 years) diagnosed as having stable angina pectoris (SAP) (23 cases), unstable angina pectoris (UAP) (23 cases) or myocardial infarction (MI) (61 cases) were prospectively evaluated. DNA was obtained from the 107 patients and 50 controls. In order to determine the Apo AI genotypes at two polymorphic sites (G/A at -75 bp, and C/T at+83 bp), DNA was PCR amplified and digested with MspI. Results The frequency of carriers of the rare allele at the - 75 bp site (M1-) was 0.49 in cases and 0.30 in controls (P<0. 05). The frequencies of the M1-allele among patients with SAP, UAP, MI and controls were 0. 37 (vs. controls, P > 0. 05), 0.54 (vs. controls, P < 0.05), 0.52 (vs. controls, P<0. 05) and 0. 30, respectively. The frequencies for carriers of the rare allele at the + 83bp polymorphism (M2) were observed among patients with SAP (0. 09, vs. controls, P > 0.05), UAP (0.11, vs. controls, P>0.05) or MI (0. 12, vs. controls, P>0. 05) and controls (0. 12). There was an slightly increase in the frequency of the Ml - allele in patients with SAP to UAP or MI (0. 37 vs. 0. 54 vs. 0. 52; all P>0. 05) and Ml polymorphism as a risk factor for CAD ( OR = 3. 74, P < 0. 05). In the + 83bp polymorphism there was no difference in the allelelic frequencies in cases and controls (0. 11 vs. 0. 12; P > 0. 05). There was no significantdifference in the frequency of the M2 - allele in patients with SAP to UAP or MI (0.09 vs. 0. 11 vs. 0. 12; all P>0. 05) and M2 polymorphism not as a factor for CAD (OR=0.80, P>0. 05).Plasma lipoprotein values in patients with the allele M1-and M2 - had no different levels than those homozygous for the M1+and M2+(P>0.05). Conclusion Ml polymorphism (M1 - ) may be as a risk factor for CAD and M2 polymorphism (M2 - ) not as a factor for CAD in Chinese Xinjiang Uygur and Han population.

Association of apolipoprotein E gene polymorphism with the occurrence and therapeutic effect of ischemic stroke

At present,ischemic stroke seriously affects people's life and health,and its occurrence,development and therapeutic effect are affected by many factors.With the deep research on ischemic cerebral apoplexy disease,people have a deeper understanding of its virulence genes.The apolipoprotein E genotype is the research focus recently,its genetic type is not only involved in the occurrence and development of ischemic cerebral apoplexy,but also causes different therapeatic effects.In this paper,we reviewed the relationship between apolipoprotein E gene polymorphism and lipid metabolism and atherosclerosis in ischemic stroke,as well as the differences in the therapeutic effects of thrombolysis,thrombectomy and lipid-lowering among different genotypes.

Ferroptosis mechanism and Alzheimer's disease

Regulated cell death is a genetically determined form of programmed cell death that commonly occurs during the development of living organisms.This process plays a crucial role in modulating homeostasis and is evolutionarily conserved across a diverse range of living organisms.Ferroptosis is a classic regulatory mode of cell death.Extensive studies of regulatory cell death in Alzheimer’s disease have yielded increasing evidence that fe rroptosis is closely related to the occurrence,development,and prognosis of Alzheimer’s disease.This review summarizes the molecular mechanisms of ferroptosis and recent research advances in the role of ferro ptosis in Alzheimer’s disease.Our findings are expected to serve as a theoretical and experimental foundation for clinical research and targeted therapy for Alzheimer’s disease.

Isoform-and cell-state-specific APOE homeostasis and function

Apolipoprotein E is the major lipid transporter in the brain and an important player in neuron-astrocyte metabolic coupling.It ensures the survival of neurons under stressful conditions and hyperactivity by nourishing and detoxifying them.Apolipoprotein E polymorphism,combined with environmental stresses and/or age-related alterations,influences the risk of developing late-onset Alzheimer’s disease.In this review,we discuss our current knowledge of how apolipoprotein E homeostasis,i.e.its synthesis,secretion,degradation,and lipidation,is affected in Alzheimer’s disease.

用酵母双杂交系统研究载脂蛋白AI(apoAI)和清道夫受体BI(SR-BI)间的相互作用

目的:利用酵母双杂交系统验证在胆固醇逆转运过程中起关键作用的大鼠载脂蛋白AI(apoAI)和清道夫受体BI- (SR -BI)间存在着相互作用,为初步筛选具有降脂活性组分提供1对新的靶点。方法:首先分别克隆了Wistar大鼠的apoAI和SR -BI基因的cDNA ,并构建了酵母表达载体,利用共转化技术观察到apoAI和SR -BI间存在着相互作用,并在酵母交配实验中证实了这个结果。结果:经共转化后的实验组与阳性对照组可在SD/ -Leu/- Trp/- His/- Ade/X -α- Gal平板上生长且菌斑呈蓝色,经测定α、β半乳糖苷酶活力可知酶活分别为8～1 2U和1 0～40U。酵母交配后的二倍体实验组、阳性对照组可在SD/- Leu/- Trp/ -His/- Ade/X -α- Gal平板上生长且菌斑呈蓝色。结论:apoAI和SR BI间的确存在相互作用。

冠心病冠脉病变程度与Apo AI/Apo B、同型半胱氨酸、血脂指标的相关性

目的探究与分析冠心病冠脉病变程度与载脂蛋白AI/载脂蛋白B(Apo AI/Apo B)、同型半胱氨酸、血脂指标的相关性。方法选取2016年12月~2018年12月辽宁中医药大学附属第二医院(以下简称“我院”)收治的67例经过冠脉造影(CAG)确诊的冠心病患者作为观察组,另选择我院同时期收治的63名健康体检者作为对照组。根据Gensini评分将冠心病患者分为低危组(n = 23)、中危组(n = 22)及高危组(n = 22)。比较各组Apo AI/Apo B、同型半胱氨酸、低密度脂蛋白、胆固醇、三酰甘油水平,探讨冠心病冠脉病变程度与Apo AI/Apo B、同型半胱氨酸、血脂指标的相关性。结果低危组、中危组、高危组的胆固醇、三酰甘油水平比较,差异无统计学意义(P > 0.05)。低危组、中危组、高危组的胆固醇、三酰甘油水平均高于对照组,差异有统计学意义(P < 0.05)。中危组、高危组Apo AI/Apo B低于低危组,但同型半胱氨酸及低密度脂蛋白水平高于低危组,差异有统计学意义(P < 0.05);高危组Apo AI/Apo B低于中危组,但同型半胱氨酸及低密度脂蛋白水平高于中危组,差异有统计学意义(P < 0.05)。低危组、中危组、高危组的同型半胱氨酸及低密度脂蛋白水平均高于对照组,Apo AI/Apo B低于对照组,差异有统计学意义(P < 0.05)。Apo AI/Apo B与冠心病冠脉病变程度呈负相关(r =-0.189,P < 0.05),同型半胱氨酸、低密度脂蛋白冠心病冠脉病变程度呈正相关(r = 0.072~0.095,P < 0.05)。结论 Apo AI/Apo B、同型半胱氨酸与低密度脂蛋白水平与冠心病冠脉病变程度具有一定的相关性,能够用于对疾病的预测及判断。

载脂蛋白AI对HDL生成影响的研究新进展

载脂蛋白AI(apolipoprotein A-I,apoA-I)是高密度脂蛋白(high-density lipoprotein,HDL)的主要蛋白成分,其中两性α-螺旋是apoA-I相应功能的结构基础。ApoA-I分子N-端是动态的四螺旋束结构,C-端形成无规则的螺旋结构,是介导蛋白质与磷脂结合的功能域。两分子apoA-I呈反向平行的双带结构环绕磷脂双分子层形成圆盘状HDL,而球状HDL表面的apoA-I分子则形成三叶草结构。ATP结合盒转运蛋白A1(ATP-binding cassette transporter A1,ABCA1)介导apoA-I与磷脂及胆固醇相互作用形成新生HDL,参与胆固醇的逆向转运过程。ApoA-I、HDL作为抗动脉粥样硬化的主要作用靶标,深入了解其分子结构与功能、构象变化和相互作用及其影响脂质代谢平衡的机制对抗动脉粥样硬化药物的研发及其应用具有重要意义。

动脉粥样硬化性脑梗塞患者载脂蛋白AI-CⅢ基因簇DNA多态性及不同基因型与血脂脂蛋白的关系

本文研究了24例动脉粥样硬化性脑梗塞患者和39例正常对照载脂蛋白AI—CⅢ基因簇EcoRI限制性片段长度多态性及不同基因型与总胆固醇、甘油三酯和高密度脂蛋白胆固醇之间的关系。患者与正常对照组R_2等位基因频率分别为0.40和0.12,二组间具极显著性差异(P<0.0001)。R_1R_2基因型个体总胆固醇和甘油三酯高于R_1R_1基因型个体,而高密度脂蛋白胆固醇低于R_1R_1基因型个体。结果显示载脂蛋白AI—CⅢ基因簇遗传变异与动脉粥样硬化性脑梗塞有关,其机制可能是通过调控高密度脂蛋白所致。

高糖膳食对载脂蛋白AI基因-75 G/A多态性不同基因型健康青年血脂及载脂蛋白比值的影响

目的探讨高糖膳食对载脂蛋白AI基因(APOA1)启动子区-75 G/A多态性不同基因型健康青年血脂及载脂蛋白比值的影响。方法给予56名平均年龄为(22.89±1.80)岁的健康青年7 d平衡膳食和6 d高糖膳食。平衡膳食的热量组成为15%蛋白质、31%脂肪和54%碳水化合物;高糖膳食的热量组成为15%蛋白质、15%脂肪和70%碳水化合物。于膳食干预的第1天、第8天和第14天清晨抽取12 h空腹静脉血,测定血脂及载脂蛋白浓度,计算甘油三酯(TG)/高密度脂蛋白胆固醇(HDL-C)、总胆固醇(TC)/HDL-C、低密度脂蛋白胆固醇(LDL-C)/HDL-C及载脂蛋白B100(APOB100)/载脂蛋白AI(APOAI)的比值。提取全基因组DNA,聚合酶链式反应-限制性片段长度多态性法分析APOA1-75 G/A多态性。结果基础值时,血脂及载脂蛋白比值在男性基因型之间的差异无统计学意义(P>0.05);在女性中,A等位基因携带者LDL-C/HDL-C显著高于GG基因型受试者(P<0.05)。高糖膳食后,TC/HDL-C在各性别和基因型分组中均显著降低(P<0.01)。LDL-C/HDL-C在男性各基因型中显著降低(P<0.05);在女性中,LDL-C/HDL-C仅在A等位基因携带者中显著降低(P<0.01),在GG基因型受试者中差异无统计学意义(P>0.05)。结论 APOA1-75 G/A多态性A等位基因可能对其女性携带者的LDL-C/HDL-C比值有一定的影响。

糖耐量减退及空腹血糖异常患者血清载脂蛋白B、AI检测及其临床意义

目的 探讨糖耐量低减 (IGT)及空腹血糖异常 (IFG)患者血清载脂蛋白B(ApoB)及载脂蛋白AI(ApoAI)水平的变化。 方法 分三组进行研究 ,IGT组 5 8例 ,IFG组 5 5例 ,6 4例血糖正常者为对照组。分别检测其甘油三脂 (TG)、总胆固醇 (TC)、低密度脂蛋白胆固醇 (LDL c)、高密度脂蛋白胆固醇 (HDL c)、脂蛋白 (a) [LP(a) ]、载脂蛋白B(ApoB)、载脂蛋白AI(ApoAI)、空腹血糖 (FPG)、糖化血红蛋白 (HbA1c)、C 肽 (C P)、胰岛素 (Ins)及体重指数 (BMI) ,间隔 2周共检测 4次。结果 IGT及IFG患者LDL c、LP(a)、ApoB水平较对照组高 ,HDL c、ApoAI及ApoAI/ApoB水平较对照组低 ,其中ApoB升高及HDL c、ApoAI/ApoB、ApoAI降低与对照组比较差异有显著性 (P <0 .0 1) ,且IGT组ApoB较IFG组明显升高 ( P <0 .0 1)。ApoB及ApoAI与HbA1c、C P、Ins及BMI水平比较无明显相关 (P >0 .0 5 )。结论 IGT及IFG患者的脂代谢紊乱以ApoB升高及ApoAI降低为主 ,这可能是 2型糖尿病患者动脉粥样硬化的重要危险因素。

肾病综合征患者中血清铁与载脂蛋白AI和载脂蛋白B的相关性分析

目的探讨肾病综合征患者血清铁与载脂蛋白AI和载脂蛋白B之间的关系。方法分别用比色法检测正常对照组和肾病综合征组血清铁以及血脂（总胆固醇、甘油三酯、高密度脂蛋白胆固醇、低密度脂蛋白胆固醇）水平，用免疫比浊法检测载脂蛋白AI、载脂蛋白B和脂蛋白（a）。结果对照组与肾病综合征组间，除血清铁差异无统计学意义外（P〉0．05），其余血脂各项指标差别均有统计学意义（P〈0．01）。对照组中，血清铁与脂蛋白（a）具有相关关系（r=0．277，P〈0．05），差异有统计学意义；肾病综合征组中血清铁与载脂蛋白AI（r=0．628，P〈0．01）和载脂蛋白B（r=0．48，P〈0．05）具有相关性，差异有统计学意义外，与其余诸项血脂指标无相关性，差异无统计学意义。结论肾病综合征患者中血清铁的水平可能与载脂蛋白AI和载脂蛋白B的紊乱有关系，其生物学意义尚待进一步研究。

2型糖尿病患者中载脂蛋白M与脂蛋白a、载脂蛋白AI的关系研究

目的研究2型糖尿病患者中载脂蛋白M(apolipoprote in M,apoM)与脂蛋白及其他载脂蛋白的相关关系。方法用dot-b lotting法检测73例2型糖尿病患者(36男37女)血浆中apoM的水平,酶法及比浊法检测糖尿病患者血浆中载脂蛋白AI(apoAI)、载脂蛋白B(apoB)、脂蛋白a[Lp(a)]、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)以及空腹血糖(G lu),ELISA法测定血浆中瘦素的含量,对apoM与其它脂蛋白、载脂蛋白、瘦素的关系作相关性分析。结果男性病例中,apoM负相关于甘油三酯(r=-0.364 8,P=0.028 7),但与年龄成正相关(r=0.375 2,P=0.026 4)。女性病例中apoM负相关于血浆Lp(a)水平(r=-0.442 0,P=0.007 0),正相关于apoAI/apoB(r=0.458 3,P=0.004 3)。男女病例混合分析发现,apoM负相关于Lp(a)(r=-0.338 5,P=0.003 0),正相关于apoAI(r=0.232 1,P=0.046 6)、瘦素(r=0.247 1,P=0.032 6)和年龄(r=0.242 0,P=0.035 2)。结论apoM负相关于Lp(a),正相关于apoAI、apoAI/apoB,提示了apoM可能是抑制动脉粥样硬化的保护因子。如果体内apoM与apoAI同时升高,可能会降低体内Lp(a)水平。

脑梗死、冠心病患者载脂蛋白AI基因第三内含子MspI位点多态性研究

为了观察载脂蛋白AI基因第三内含子MspI位点多态性在北京地区汉族人群冠心病患者和脑梗死患者中的分布特点 ,探讨其与脂质代谢的关系 ,采用聚合酶链反应扩增技术对 783例个体载脂蛋白AI基因型进行分析 ,其中脑梗死组 2 36例 ,冠心病组 2 2 6例 ,对照组 32 1例 ,同时测定血脂及载脂蛋白。结果显示载脂蛋白AI基因第三内含子M2 等位基因频率与冠心病密切相关。M2 等位基因频率为 0 .387,与对照组相比增加 (P <0 .0 5 ) ;M2 等位基因频率脑梗死组与对照组相比有所增加 ,但统计学上未见差异 (P >0 .0 5 )。M2 M2 纯合等位基因型组的血脂变量与M1M1及M1M2 等位基因型组比较无论是在对照组还是在冠心病、脑梗死组中均存在显著差异。提示载脂蛋白AI基因第三内含子M2 等位基因的检出为进一步揭示该基因在冠心病发病及冠心病、脑梗死脂质代谢中的作用提供了良好的遗传标记 ,对预测血脂相关性疾病的危险性具有重要意义。