OBJECTIVESTo detect the cholesterol ester transfer protein (CETP) levels in semen of infertile patients and evaluate the correlation between CETP in semial plasma and infertility.

METHODSOne hundred and sixty-three infertile patients and fifteen fertile males were selected randomly. The routine examination of ejaculates was fulfilled by computer aided semen analysis (CASA). The CETP levels in all seminal plasma samples and fifty-five serum samples were detected by ELISA method.

RESULTSThe CETP levels in infertile patients and fertile males were (2.21 +/- 1.23) microgram/L and (1.40 +/- 0.45) microgram/L, respectively. There were no significant differences between the two groups(P > 0.05). And there were no significant differences of CETP levels in seminal plasma among groups of azoospermia(n = 29), oligoasthenozoospermia (n = 58), oligospermia(n = 15), asthenozoospermia(n = 44) and normozoospermia(n = 17) in the infertile patients(P > 0.05). The CETP in seminal plasma and serum were detected in 55 infertile patients, and there was no correlation between CETP levels in seminal plasma and serum using Spearman analysis(r = 0.009, P > 0.05). The mean CETP level in seminal plasma was almost 1/1,000 of that in serum.

CONCLUSIONSThe CETP level in seminal plasma is extremely low and has no relation with the changes of sperm density or motility. It may ensure the integrity of sperm membrane before the sperm enters into female genital tract.

Adult ; Carrier Proteins ; analysis ; blood ; Cholesterol Ester Transfer Proteins ; Glycoproteins ; Humans ; Infertility, Male ; metabolism ; Male ; Middle Aged ; Semen ; chemistry

OBJECTIVETo detect cholesteryl ester transfer protein (CETP) levels, frequencies of CETP D442G and I 14A mutations and characteristics of abnormal lipids in patients with cardio-cerebro vascular diseases.

METHODSNinety-four myocardial infarction (MI) patients, 110 stroke patients and 335 healthy controls were selected. The CETP concentration was determined using ELISA. The CETP activity was measured using a substrate of (14)C-radiolabeled discoidal bilayer particles. The CETP gene mutations were detected by PCR-RFLP.

RESULTSThe CETP concentrations in the MI and stroke group, were higher than those in the controls. The gene mutation frequencies of D442G in the MI, stroke and control group were 3.5%, 3.6% and 5%, respectively, and the frequencies of I 14A were 1.05%, 0.91% and 1%, respectively. One case of D442G homozygote was detected in the healthy group. The frequency of two CETP gene mutations showed no significant difference among the patients and controls. The CETP concentration and activity in subjects with CETP mutations were one-third of those in the control group. The level of HDL-C, apo-A1 increased in the mutation subjects, while the TG level decreased.

CONCLUSIONSThe CETP level increased significantly in patients with cardio-cerebrovascular diseases. The carriers of CETP deficiency had CETP and lipid abnormalities.

Carrier Proteins ; blood ; genetics ; Cholesterol Ester Transfer Proteins ; Glycoproteins ; Humans ; Lipids ; blood ; Male ; Middle Aged ; Mutation ; Myocardial Infarction ; blood ; genetics ; Stroke ; blood ; genetics

OBJECTIVETo study the correlation between the serum levels of phospholipid transfer protein (PLTP), cholesteryl ester transfer protein (CETP), and Chinese medical syndrome types of coronary heart disease (CHD) patients, thus probing a new pathway for the objectivity of CHD syndrome typing and developing therapeutic drugs.

METHODS201 patients with CHD confirmed by coronary angiography were selected. The comprehensive analysis database by the four examination methods was established using generally accepted standard for Chinese medical syndrome typing. Twenty healthy subjects were randomly recruited as the control group. Serum samples were separated from venous blood. The serum activities of PLTP and CETP were assayed by ELISA. The triglyceride (TG) content was determined using acetic acetone coloring method. Contents of total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), and low-density lipoprotein cholesterol (LDL-C) were determined using precipitation floating enzyme couplet method.

RESULTSSerum levels of PLTP, CETP, and TC of CHD patients of all Chinese medical syndrome types were significantly higher than those of the control group, showing statistical difference (P<0.05, P<0.01). Statistical difference existed in serum levels of TG, HDL-C, and LDL-C of all Chinese medical syndrome types when compared with the control group (P<0.05, P<0.01). Statistical difference existed in serum levels of PLTP between the sthenia in superficiality groups of all Chinese medical syndrome types and the asthenia in origin groups of all Chinese medical syndrome types (P< 0.05). Statistical difference existed in serum levels of TG, HDL-C, and LDL-C between the sthenia in superficiality groups of all Chinese medical syndrome types and the asthenia in origin groups of all Chinese medical syndrome types (P<0.05, P<0.01).

CONCLUSIONSThe serum PLTP levels of CHD patients of sthenia in superficiality significantly increased. Changes in serum lipids was more significant in CHD patients of the sthenia in superficiality syndrome than in those of the asthenia in origin syndrome.

Adult ; Aged ; Aged, 80 and over ; Case-Control Studies ; Cholesterol ; blood ; Cholesterol Ester Transfer Proteins ; blood ; Coronary Disease ; blood ; diagnosis ; Female ; Humans ; Male ; Medicine, Chinese Traditional ; Middle Aged ; Phospholipid Transfer Proteins ; blood ; Triglycerides ; blood

OBJECTIVETo analyze the effects of cholesterol ester transfer protein (CETP) Taq1B polymorphism on the response of serum HDL-C to dietary factors in hyperlipidemia patients.

METHODSAll 141 hyperlipidemia residents in a community in Shanghai were investigated by a 3-day diet questionnaire. The serum lipids were analyzed, and the polymorphism of CETP gene was detected by PCR-RFLP method. The correlation between dietary factors and serum HDL-C in different genotype was analyzed when considering the effects of sex, age and body mass index.

RESULTThe HDL-C of hyperlipidemia patients was affected by dietary factors and CETP gene Taq1B polymorphism. The strength of the correlation between dietary factors and serum HDL-C was different among the genotype groups. The relation was shown closer in B(2)B(2) subjects than in B(1)B(1).

CONCLUSIONThe Taq1B CETP gene polymorphism should be a strong determinant of HDL-C in hyperlipidemia patients, and might contribute to the heterogeneity in HDL-C response to dietary intervention.

Cholesterol Ester Transfer Proteins ; genetics ; Cholesterol, HDL ; blood ; Diet ; Disease Susceptibility ; Female ; Gene Frequency ; Genotype ; Humans ; Hyperlipidemias ; blood ; genetics ; Male ; Middle Aged ; Polymorphism, Single Nucleotide

OBJECTIVETo study the distribution of cholesteryl ester transfer protein (CETP)-TaqIB polymorphism and plasma concentration in general population and the association between the two.

METHODSA cross-sectional study was carried out in a general population of Beijing in 1999, using stratified-random sampling method. CETP-TaqIB polymorphism and plasma CETP concentration were determined in 719 individual aged 45 - 64 years.

RESULTS(1) Frequencies of B1B1, B1B2 and B2B2 genotypes were 0.356, 0.478 and 0.166, respectively. The frequency of allele B2 was 0.405. Distributions of genotypes and alleles were homogeneous in both sexes. (2) Plasma CETP concentration manifested as a normal distribution, with the mean of 2.03 micro g/ml. The value of female was 20.3%, higher than that of male (P < 0.001). There were no differences among age groups. (3) Plasma CETP concentrations of B1B1 and B1B2 were 19.6% and 13.4% higher than that of B2B2 homozygotes. (4) Stratified by lipid levels, smoking and alcohol consumption, only when tryglyceride exceeded 150 mg/dl, with no significant difference among three genotypes. The effect of lipids, smoking and alcohol consumption status was more significant in B1B2 heterozygotes.

CONCLUSIONCETP-TaqIB polymorphism was a determinant of plasma CETP concentration. However, the effect could be modified by other factors, such as lipids, smoking and alcohol consumption.

Carrier Proteins ; blood ; genetics ; Cholesterol Ester Transfer Proteins ; Cross-Sectional Studies ; Female ; Genotype ; Glycoproteins ; blood ; genetics ; Humans ; Lipids ; blood ; Male ; Middle Aged ; Polymorphism, Genetic ; Sampling Studies

BACKGROUNDThe Taq/B, Msp/ and I405V polymorphisms of cholesteryl ester transfer protein (CETP), an important regulatory factor of lipid metabolism, have been attracted much more attention by the researchers. In this study, we investigated the associations between these 3 polymorphisms of CETP gene and variations in plasma lipid and lipoprotein levels in patients with coronary heart disease (CHD).

METHODSGenomic DNA was extracted from leukocytes of 203 CHD patients and 100 control subjects using the salting out method. Genotyping of the CETP gene was performed using polymerase chain reaction (PCR) and restriction fragment length polymorphism (RFLP) techniques. Statistical analysis was conducted using the SPSS 10.0 software package.

RESULTSThe distribution of allele and genotype frequencies of the Taq/B, MspI, and I405V polymorphisms was similar in the CHD patient group and the control group. The B1B1 genotype of the Taq/B polymorphism was associated with significantly higher TC (P=0.039) and LDL-C (P=0.044) levels than the B2B2 genotype in CHD patients, and with significantly higher LDL-C (P=0.034) levels than the B2B2 genotype in controls. Homozygotes of the I405V polymorphism exhibited significantly higher HDL-C levels than VV homozygotes among control subjects (P=0.023). In male CHD patients with unambiguously assigned haplotypes, B2-M2-V/B2-M2-I patients demonstrated significantly higher HDL-C concentrations than B1-M2-V/B1-M2-I (P=0.023) and B1-M2-V/B1-M2-V patients (P=0.047).

CONCLUSIONSGenetic variations in the CETP gene may account for a significant proportion of the differences in plasma lipid and lipoprotein concentrations among the general population. The B1B1 genotype of the Taq/B polymorphism is probably a genetic risk factor for CHD in the study population.

Adult ; Aged ; Carrier Proteins ; genetics ; Cholesterol Ester Transfer Proteins ; Cholesterol, HDL ; blood ; Cholesterol, LDL ; blood ; Coronary Disease ; blood ; genetics ; Female ; Gene Frequency ; Glycoproteins ; genetics ; Humans ; Lipids ; blood ; Male ; Middle Aged ; Polymorphism, Genetic

Several parameters and risk factors were compared between Korean male myocardial infarction (MI) patients (n = 10) and angina pectoris (AP) patients (n = 17) to search unique biomarkers for myocardial infarction (MI) in lipoprotein level. Individual serum and lipoprotein fractions (VLDL, LDL, HDL2, HDL3) were isolated and analyzed by lipid and protein determination and enzyme assay. The MI group was found to have a 25 and 30% higher serum cholesterol and triacylglycerol (TG) level than the AP group, respectively, however, their body mass index (BMI), LDL-cholesterol (C), HDL-C, and glucose levels fell within the normal range. MI patients were found to have an approximately two-fold higher level of serum IL-6 and an 18% lower serum apoA-I level than that of the AP group. LDL and HDL2 fraction of the MI group were more enriched with TG than those of AP group. The increased TG was correlated well with the increased level of apoC-III in the same fraction. Cholesteryl ester transfer protein (CETP) activity and protein level were greatly increased in MI patients in the LDL and HDL3 fractions. MI patients showed more severely oxidized LDL fraction than patients in the AP group, as well as the weakest antioxidant ability of serum. Conclusively, MI patients were found to have unique serum and lipoprotein characteristics including increased IL-6 and TG in serum, with CETP and apoC-III in the LDL and HDL fractions, as well as severely impaired antioxidant ability of HDL.
Aged ; Angina Pectoris/*blood ; Apolipoprotein C-III/blood ; Cholesterol Ester Transfer Proteins/blood ; Copper/metabolism ; Humans ; Lipids/blood ; Lipoproteins/*blood ; Lipoproteins, LDL/blood ; Male ; Middle Aged ; Myocardial Infarction/*blood ; Oxidation-Reduction ; Triglycerides/blood

Several parameters and risk factors were compared between Korean male myocardial infarction (MI) patients (n = 10) and angina pectoris (AP) patients (n = 17) to search unique biomarkers for myocardial infarction (MI) in lipoprotein level. Individual serum and lipoprotein fractions (VLDL, LDL, HDL2, HDL3) were isolated and analyzed by lipid and protein determination and enzyme assay. The MI group was found to have a 25 and 30% higher serum cholesterol and triacylglycerol (TG) level than the AP group, respectively, however, their body mass index (BMI), LDL-cholesterol (C), HDL-C, and glucose levels fell within the normal range. MI patients were found to have an approximately two-fold higher level of serum IL-6 and an 18% lower serum apoA-I level than that of the AP group. LDL and HDL2 fraction of the MI group were more enriched with TG than those of AP group. The increased TG was correlated well with the increased level of apoC-III in the same fraction. Cholesteryl ester transfer protein (CETP) activity and protein level were greatly increased in MI patients in the LDL and HDL3 fractions. MI patients showed more severely oxidized LDL fraction than patients in the AP group, as well as the weakest antioxidant ability of serum. Conclusively, MI patients were found to have unique serum and lipoprotein characteristics including increased IL-6 and TG in serum, with CETP and apoC-III in the LDL and HDL fractions, as well as severely impaired antioxidant ability of HDL.
Aged ; Angina Pectoris/*blood ; Apolipoprotein C-III/blood ; Cholesterol Ester Transfer Proteins/blood ; Copper/metabolism ; Humans ; Lipids/blood ; Lipoproteins/*blood ; Lipoproteins, LDL/blood ; Male ; Middle Aged ; Myocardial Infarction/*blood ; Oxidation-Reduction ; Triglycerides/blood

OBJECTIVETo investigate the variations of cholesterol ester transfer protein (CETP) gene and its relation to endogenous hypertriglyceridemia (HTG) in Chinese population.

METHODSOne hundred and thirty-five endogenous hypertriglyceridemics and 214 healthy subjects from a population of Chinese Han nationality in Chengdu area were studied using restriction fragment length polymorphism (RFLPs) amplified by polymerase chain reaction (PCR). The polymorphic sites studied included Taq IB and -629 C/A polymorphism in CETP gene.

RESULTSThe frequencies of B(2) allele at Taq IB site in normal group and HTG group were 0.418 and 0.382, respectively. The frequencies of A allele at -629 C/A site in the two groups were 0.479 and 0.489, respectively. No significant difference between normal control and HTG groups were found in both allele frequency of the two polymorphism. Linkage disequilibrium was observed between Taq IB and -629 C/A polymorphic sites (D'=0.881). In the normal control group, subjects with genotype B(2)B(2) of Taq IB site had a higher serum mean concentration of HDL-C and lower LDL-C when compared with that of genotype B(1)B(1) and B(1)B(2), respectively (both P< 0.05), while those with genotype CC of -629 C/A site had a lower LDL-C level and higher Apo A II level when compared with that of genotype AC (P< 0.01 and P< 0.05, respectively). The changes of the lipid and lipoprotein levels were only observed in normal male subjects when male and female groups were further separated. No significant changes of lipid and lipoprotein levels were observed in both polymorphism in HTG group. Combined genotype analysis of the two sites, subjects with genotype B(2)B(2)CC in normal controls had higher HDL-C levels but lower serum triglyceride (TG) when compared with B(1)B(1)CC.

CONCLUSIONThese results suggest that Taq IB and -629 C/A polymorphisms in CETP gene are associated with healthy control subjects to some extent in Chinese population, but not with endogenous hypertriglyleridemia in the population group.

Adult ; Aged ; Aged, 80 and over ; Apolipoproteins ; blood ; Asian Continental Ancestry Group ; genetics ; China ; Cholesterol Ester Transfer Proteins ; genetics ; Cholesterol, HDL ; blood ; Cholesterol, LDL ; blood ; DNA ; genetics ; metabolism ; Deoxyribonucleases, Type II Site-Specific ; metabolism ; Female ; Gene Frequency ; Genotype ; Humans ; Hypertriglyceridemia ; blood ; ethnology ; genetics ; Linkage Disequilibrium ; Male ; Middle Aged ; Polymerase Chain Reaction ; Polymorphism, Restriction Fragment Length ; Polymorphism, Single Nucleotide ; Promoter Regions, Genetic ; Triglycerides ; blood

OBJECTIVETo investigate cholesteryl ester transfer protein (CETP) gene polymorphism -629C/A among Han Chinese patients with coronary heart disease (CHD) in Tianjin region, and to assess the influence of genetic factors on therapeutic effect of atorvastatin and clinical outcome in order to provide a pharmacogenomic basis for personalized treatment.

METHODSFrom October 2010 to July 2011, 232 patients with angiographically confirmed CHD were recruited. Polymorphism of position -629 of CETP gene promoter was determined with polymerase chain reaction - restricted fragment length polymorphism (PCR-RFLP) method. Serum level of CETP was determined with enzyme-linked immunosorbent assay (ELISA). Lipid level in all patients was determined at baseline and after 12 months of treatment with 20 mg/d atorvastatin. Clinical follow-up was carried out for more than a year (12-23 months). Major adverse cardiac events including death, non-fatal infarction, revascularization and stroke (MACE) were recorded. A Kaplan-Meier log-rank test was used to compare MACE-free survival for individuals with various genotypes.

RESULTSThe frequency of -629A allele was 0.408. Compared with CC or CA genotypes, individuals with AA genotype had lower CETP levels and higher high-density lipoprotein cholesterol (HDL-C) levels, albeit without statistical significance (F = 0.893, P = 0.411 and F = 1.279, P = 0.282, respectively). There also appeared to be a negative correlation between serum HDL-C and CETP levels, though no statistical significance was detected (r = -0.151, P = 0.081). After 12 months atorvastatin therapy, individuals with CC genotype had greater reduction of low-density lipoprotein cholesterol (LDL-C), reduced LP(a) and elevated HDL-C compared with CA or AA genotypes. LDL-C level has decreased by 35.41% in CC homozygotes, 18.84% in CA heterozygotes and 8.15% in AA homozygotes (P = 0.001). HDL-C level has increased by 14.37% in CC homozygotes, 10.48% in CA heterozygotes and 6.64% in AA homozygotes, respectively. However, above changes did not reach statistical significance (P = 0.470). The incidence of MACE after a mean follow-up of (18.66 ± 5.99) months was 7.76%, which included 2 (0.86%) deaths, 5 (2.16%) non-fatal infarctions, 9 (3.88%) revascularizations and 2 (0.86%) strokes. The cumulative MACE-free survival rates were 92.4%, 85.3% and 65.0% for CC, CA and AA genotypes, respectively (Log-rank P = 0.444).

CONCLUSIONOur results suggested that AA variant for the -629A allele of CETP gene had higher HDL-C levels and reduced CETP levels, though patients with CC genotype appeared to have better benefited from statin therapy with reduction in LDL-C and LP(a) levels. Long-term clinical prognosis was however not affected by the 3 genotypes.

Adult ; Aged ; Atorvastatin Calcium ; Cholesterol Ester Transfer Proteins ; blood ; genetics ; Cholesterol, HDL ; blood ; Cholesterol, LDL ; blood ; Coronary Artery Disease ; blood ; drug therapy ; genetics ; Female ; Heptanoic Acids ; therapeutic use ; Humans ; Male ; Middle Aged ; Mutation, Missense ; Polymorphism, Single Nucleotide ; Pyrroles ; therapeutic use ; Treatment Outcome