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Biomedical subjects

A F H Stalenhoef

Publications and source records attributed to A F H Stalenhoef.

At least 19 recordsLinked to original sources
PubMed2006

[Secondary prevention of recurrent stroke by lowering cholesterol levels and blood pressure].

The most important risk factor for stroke is blood pressure: lowering the diastolic pressure by 5-6 mmHg or the systolic pressure by 10 mmHg will reduce the number of strokes in the general population (primary prevention) by 30-40% over 4-5 years. This effect is enhanced by the concurrent use of diuretics. The association between stroke and serum cholesterol was unclear until trials on preventing cardiovascular disease showed the introduction of statins to be clearly beneficial on strokes. In the recent 'Stroke prevention by aggressive reduction in cholesterol levels' (SPARCL) trial, high-dose statin therapy was shown to reduce the risk of fatal and non-fatal stroke in patients with a history of ischaemic stroke or transient ischaemic attack (TIA), but without manifest coronary disease (secondary prevention). A difference in LDL-cholesterol of 1.4 mmol/l was associated with a significant absolute 5-year risk reduction of fatal and non-fatal stroke of 2.2%, whereas the risk of major cardiovascular events was reduced by 3.5%. It is already known that stroke or TIA should be regarded as a 'coronary heart disease risk equivalent' for which secondary prevention guidelines apply. However, high-dose statin therapy should be given only after careful selection of the stroke patient at very high risk because of its high cost, adverse effects and a possible increase in haemorrhagic stroke.

Anticholesteremic Agents↗
PubMed2006

Non-transferrin-bound iron is associated with plasma level of soluble intercellular adhesion molecule-1 but not with in vivo low-density lipoprotein oxidation.

BACKGROUND: Excess body iron is associated with increased cardiovascular disease risk, possibly via non-transferrin-bound iron (NTBI)-mediated enhancement of inflammation and oxidation of low-density lipoprotein (LDL). METHODS: We assessed this proposed atherosclerotic mechanism of body iron by determining the relationship of levels of serum iron parameters, including NTBI, with plasma markers of inflammation and LDL oxidation in 232 subjects who visited the outpatient clinic for hemochromatosis family screening. RESULTS: Plasma level of soluble intercellular adhesion molecule-1 (sICAM-1) was positively related to ferritin (standardized beta coefficient 0.16) and to NTBI (0.185) and negatively to total iron-binding capacity (TIBC, -0.166). Significant higher levels of sICAM-1 were found for subjects in the highest quartile of NTBI compared to the lowest quartile of NTBI (122 microg/L (107-141) and 106 microg/L (89-125), median (interquartile range), p<0.001). Odds ratio of subjects having sICAM-1 level above 134 microg/L (75th percentile) in the highest and lowest quartile of NTBI amounted 2.3. White blood cell count was positively related to ferritin (0.149). High-sensitivity C-reactive protein, interleukin-6, interleukin-8, oxidized LDL, oxidized LDL/apolipoprotein B and IgG and IgM antibodies to oxidized LDL were not related to any of the markers of iron status. CONCLUSION: Excess body iron, reflected by elevated serum ferritin and NTBI and decreased TIBC, is associated with increased plasma level of sICAM-1 but not with markers of in vivo LDL oxidation.

Adult↗
PubMed2006

[The practice guideline 'Diagnosis and treatment of familial hypercholesterolaemia' of the Dutch Health Care Insurance Board].

Until 2010, the Dutch ministry of Health, Welfare and Sport will fund a nationwide project to identify the approximately 40,000 patients with familial hypercholesterolaemia (FH) in the Netherlands. The Health Care Insurance Board will coordinate the project and safeguard its quality, while the 'Stichting Opsporing Erfelijke Hypercholesterolemie' [Foundation for the Detection of Hereditary Hypercholesterolaemia], with its national network of genetic fieldworkers, will search systematically within families with assessed FH-mutations. The referral of the first suspected case of FH in a family for DNA diagnosis remains a task for GPs, internists and other clinical professionals; these will also be expected to take the responsibility for treatment. The list of diagnostic criteria of the 'Dutch Lipid Clinic Network' has recently been validated and is recommended as a decision-tool for initiating DNA diagnosis. After confirmation of the DNA diagnosis, the plasma level of LDL-cholesterol remains the main criterion for pharmacotherapy; treatment with hypocholesterolaemic agents is recommended at levels above 2.5 mmol/l.

Anticholesteremic Agents↗
PubMed2006

The Gln223Arg polymorphism in the leptin receptor is associated with familial combined hyperlipidemia.

OBJECTIVE: Familial combined hyperlipidemia (FCH) is characterized by elevated levels of total cholesterol (TC), triglycerides (TG) and apolipoprotein B (apo B) and is associated with premature cardiovascular disease (CVD). Other features of FCH are obesity and insulin resistance. Serum leptin levels have also been associated with obesity, insulin resistance and atherosclerosis. Leptin exerts its effect through the leptin receptor (LEPR). The aim of this study is to determine whether the Gln223Arg polymorphism in the LEPR gene contributes to FCH and its associated phenotypes. METHODS: The study population consists of 37 families, comprising 644 subjects, of whom 158 subjects were diagnosed as FCH. The FCH diagnosis was based on plasma TC and TG levels, adjusted for age and gender, and absolute apo B levels, according to our recently published nomogram. The Gln223Arg polymorphism was studied by restriction fragment length polymorphism-PCR. RESULTS: Carriers of one or two Arg alleles had an increased risk of FCH, compared to subjects homozygous for the Gln allele (OR=1.6 [95% CI 1.0-2.4]). A difference in high-density lipoprotein cholesterol (HDL-c) levels was present between carriers and non-carriers of an Arg allele, 1.21 vs 1.28 mmol/l, respectively (P=0.04), but no differences in obesity, insulin resistance and other lipid parameters were found. CONCLUSION: The Gln223Arg polymorphism in the LEPR gene is associated with FCH, which is supported by a significant association between HDL-c levels and the LEPR gene.

Adult↗
PubMed2006

A genome-wide linkage scan for homocysteine levels suggests three regions of interest.

BACKGROUND: An elevated plasma total homocysteine (tHcy) level is a risk factor for many clinical conditions, including vascular disease and venous thrombosis. The tHcy levels are partly determined by genetic factors. Extensive candidate gene studies have identified several genetic variants, including the MTHFR 677C>T, that influence tHcy levels, but so far only part of the genetic variation in tHcy can be explained. OBJECTIVE: In order to identify chromosomal regions that influence tHcy levels, a genome-wide linkage analysis was conducted. PATIENTS/METHODS: Our study population consisted of 13 pedigrees and 469 subjects with data on fasting plasma tHcy levels. A set of 377 markers covering the genome was genotyped in 275 subjects. The variance component linkage method (SOLAR version 2.1.3) was used for the two-point and multipoint linkage analyses. RESULTS: The heritability of the age- and sex-adjusted homocysteine levels was 44%. The multipoint linkage analysis identified one region with suggestive linkage on chromosome 16q (LOD score 1.76; nominal P = 0.0024). Weaker evidence of linkage was found for regions on chromosome 12q (LOD score 1.57; nominal P = 0.0036) and chromosome 13q (LOD score 1.52; nominal P = 0.0041). CONCLUSIONS: In our families the plasma tHcy level was highly heritable. The multipoint linkage analysis identified three regions that showed weak to suggestive linkage to tHcy levels.

Adolescent↗
PubMed2006

The story of PON1: how an organophosphate-hydrolysing enzyme is becoming a player in cardiovascular medicine.

Since the discovery of human serum paraoxonase (PON1), the enzyme has been the subject of various fields of research. Initially, PON1 was identified as an enzyme capable of hydrolysing organophosphate compounds, but there is a growing body of evidence that PON1 plays a role in lipid metabolism and the onset of cardiovascular disease. Still, the precise mechanism by which PON1 functions in vivo remains to be clarified. Here we will briefly review developments in the field of PON1 research which merit further attention.

Arteriosclerosis↗
PubMed2005

Proportion of oxidized LDL relative to plasma apolipoprotein B does not change during statin therapy in patients with heterozygous familial hypercholesterolemia.

OBJECTIVE: Circulating oxidized low-density lipoprotein (LDL) has been shown to be a useful marker for identifying patients with coronary heart disease (CHD) and persons at high cardiovascular risk. The effect of cholesterol-lowering therapy on plasma level of oxidized LDL is not clear. METHODS AND RESULTS: We investigated effects of cholesterol lowering by therapeutic intervention (2 years) with atorvastatin (80 mg daily) and simvastatin (40 mg daily) on circulating oxidized LDL (absolute level and in proportion to plasma apolipoprotein B) in relation to atherosclerosis progression (carotid intima-media thickness, carotid IMT) and to inflammation (high-sensitivity C-reactive protein, hsCRP) in 115 stable patients with heterozygous familial hypercholesterolemia (FH). Atorvastatin and simvastatin reduced plasma-oxidized LDL (-43 and -35%, respectively) in proportion to the decrease in plasma apolipoprotein B. Neither absolute nor relative level of oxidized LDL correlated with carotid IMT or hsCRP at baseline. Also changes in levels of circulating oxidized LDL were not related to changes in carotid IMT and hsCRP. CONCLUSIONS: In familial hypercholesterolemia-oxidized LDL carried in plasma is strongly associated with apolipoprotein B but not with inflammation nor with carotid IMT, and statin treatment does not reduce oxidized LDL relative to apolipoprotein B.

Anticholesteremic Agents↗
PubMed2005

Role of insulin resistance in familial combined hyperlipidemia.

OBJECTIVE: Insulin resistance is associated with increased triglyceride levels, low high-density lipoprotein cholesterol, small dense low-density lipoprotein (LDL), and increased apolipoprotein B (apoB) levels, all characteristics of familial combined hyperlipidemia (FCH). Therefore, we explored the role of insulin resistance in FCH lipid phenotype expression. METHODS AND RESULTS: FCH was defined by traditional diagnostic criteria including plasma total cholesterol or triglyceride levels >90th percentile. Insulin resistance was assessed by the Homeostasis Model Assessment (HOMA) index. In total, 132 subjects with FCH, 350 normolipidemic relatives, and 81 spouses who referenced as controls were studied. FCH subjects were significantly more insulin resistant compared with controls and normolipidemic relatives (HOMA index 2.9 [95% CI, 2.6 to 3.2], 2.2 [95% CI, 2.0 to 2.5], and 2.0 [95% CI, 1.9 to 2.2], respectively), even after correction for sex, age, and body mass index (BMI). The degree of insulin resistance was associated with the lipid phenotype expression, and a change in insulin-resistant state was associated with a change in lipid phenotype expression over 5 years. For any level of insulin resistance and degree of obesity, FCH subjects had increased levels of apoB and more small dense LDL compared with controls. CONCLUSIONS: Insulin resistance is a characteristic feature of FCH, which is not fully explained by their increased BMI and is associated with (change in) lipid phenotype expression. Furthermore, our results support the concept of genetic origin of high apoB and small dense LDL in FCH, which is modulated by insulin resistance and obesity.

Adult↗
PubMed2005

Effect of rosuvastatin on insulin sensitivity in patients with familial combined hyperlipidaemia.

BACKGROUND: By influencing the mevalonate pathway, statins may have multiple effects besides lipid lowering. This study was designed to evaluate the effect of rosuvastatin on serum lipids and insulin sensitivity in nondiabetic subjects with familial combined hyperlipidaemia (FCH), a population characterized by decreased insulin sensitivity. METHODS: In a double-blind randomized crossover study, 18 subjects with FCH (without evident cardiovascular disease, mean age 54 +/- 7 years) were randomized to rosuvastatin 40 mg day(-1) or placebo for 12 weeks. Blood samples were taken at baseline and after 4, 8 and 12 weeks of both treatment periods. Insulin sensitivity was determined with euglycaemic-hyperinsulinaemic clamp after 12 weeks of both treatment periods. RESULTS: Serum lipids and lipoproteins improved significantly. Mean total cholesterol after the rosuvastatin treatment period was 44% lower compared to the placebo treatment period (triglycerides -28%; LDL-c -50%; VLDL-c -56%, VLDL-TG -39%) and both parameters of low-grade inflammation (as measured by hsCRP, -16%) and oxidative stress (as measured by plasma-oxLDL, -55%) decreased markedly after rosuvastatin therapy as compared to placebo. However, the insulin sensitivity index was unchanged (41.7 +/- 17.4 vs. 40.6 +/- 11.1 L kg(-1) min(-1), placebo vs. rosuvastatin, P = 0.71). CONCLUSION: Despite marked improvements in lipid and lipoprotein values, low-grade inflammation and oxidative stress, a relatively high dose of rosuvastatin did not change insulin sensitivity in subjects with FCH.

Blood Glucose↗
PubMed2005

Effects of atorvastatin and vitamin E on lipoproteins and oxidative stress in dialysis patients: a randomised-controlled trial.

OBJECTIVES: The objective of this study was to examine the effects of treatment with atorvastatin, alpha-tocopherol and the combination of both, on lipoproteins and oxidative stress in dialysis patients. DESIGN AND SETTING: This double-blind randomised placebo-controlled trial was performed at the dialysis department of a non-university hospital. SUBJECTS, INTERVENTION AND MEASUREMENTS: A total of 44 clinically stable, non-diabetic patients on dialysis therapy (23 on haemo- and 21 on peritoneal-dialysis) without manifest cardiovascular disease were included in this study. They were randomised for treatment during a period of 12 weeks with 40 mg atorvastatin + placebo alpha-tocopherol (group 1) once daily, 800 IU alpha-tocopherol + placebo atorvastatin once daily (group 2), 40 mg atorvastatin + 800 IU alpha-tocopherol once daily (group 3), or placebo atorvastatin + placebo alpha-tocopherol once daily (group 4). Assessment of lipid profile and oxidative stress was performed at the start of the study and after 12 weeks of treatment. RESULTS: Treatment with atorvastatin reduced total cholesterol, triglycerides (TG), low-density lipoprotein (LDL) cholesterol, apolipoprotein B (apoB) and levels of oxidised LDL (oxLDL) with 30-43%. It had no influence on LDL oxidisability. Additional supplementation with alpha-tocopherol had no effect on lipid profile and oxLDL levels but decreased in vitro LDL oxidisability. No side-effects were observed. CONCLUSIONS: Treatment with atorvastatin is effective in lowering plasma total cholesterol, TG, LDL, apoB and oxLDL in a population of stable dialysis patients and might therefore be an effective tool in improving the poor cardiovascular outcome in these patients. Supplementation of alpha-tocopherol to atorvastatin had beneficial effects on in vitro LDL oxidisability and might therefore be of additional value. Further research on the clinical effects of treatment with atorvastatin in combination with alpha-tocopherol is necessary.

Adult↗
PubMed2005

The effect of statin therapy on plasma high-density lipoprotein cholesterol levels is modified by paraoxonase-1 in patients with familial hypercholesterolaemia.

OBJECTIVES: Statins reduce low-density lipoprotein cholesterol (LDL-C) and can raise high-density lipoprotein cholesterol (HDL-C). HDL-bound paraoxonase-1 (PON1) is associated with variations in plasma HDL-C, and may, therefore, contribute to changes of HDL-C during statin therapy. DESIGN: The effects of baseline PON1 status to HDL-C changes because of statin therapy were investigated. PON1 status was determined with (i) PON1 -107C>T and 192Q>R genotype, (ii) PON1 levels and (iii) PON1 paraoxonase, diazoxonase and arylesterase activity. SETTING: Radboud University Nijmegen Medical Centre, Nijmegen, the Netherlands. SUBJECTS: A total of 134 familial hypercholesterolaemia (FH) patients undergoing atorvastatin or simvastatin therapy. RESULTS: PON1 levels and activities significantly modified the HDL-C increment (P=0.002 for PON1 levels and arylesterase activity and P=0.001 for diazoxonase activity). The effects were even more evident amongst subgroup classifications based on PON1 status and baseline HDL-C concentrations: the HDL-C increment was more pronounced in subgroups of -107CT/TT or 192QR/RR genotype combined with low baseline HDL-C (+13.9%, P<0.001, respectively+15.4%, P<0.001). In contrast, the -107CC or 192QQ genotype in combination with high baseline HDL-C, did not show a significant increase of HDL-C. CONCLUSIONS: PON1 status in conjunction with baseline HDL-C levels predicts HDL-C increment during statin therapy in FH patients.

Anticholesteremic Agents↗
PubMed2004

Influence of anti-tumour necrosis factor therapy on cardiovascular risk factors in patients with active rheumatoid arthritis.

BACKGROUND: Tumour necrosis factor (TNF) is known to increase the concentrations of interleukin (IL) 6 and C reactive protein (CRP) and to induce proatherogenic changes in the lipid profile and may increase the cardiovascular risk of patients with rheumatoid arthritis (RA) and other inflammatory disorders. OBJECTIVE: To assess whether anti-TNF therapy modifies the cardiovascular risk profile in patients with RA. METHODS: The lipoprotein spectrum and the inflammation markers CRP and IL6 were investigated in 33 patients with RA treated with human anti-TNF monoclonal antibodies (D2E7, adalimumab, Humira) and 13 patients with RA given placebo, before and after 2 weeks' treatment. RESULTS: In the anti-TNF treated group, the mean (SD) concentrations of HDL-cholesterol were significantly higher after 2 weeks' treatment (0.86 (0.30) mmol/l v 0.98 (0.33) mmol/l, p<0.01), whereas LDL and triglyceride levels were not significantly changed. Additionally, a significant decrease in CRP (86.1 (54.4) mg/l v 35.4 (35.0) mg/l, p<0.0001), and IL6 (88.3 (60.5) pg/ml v 42.3 (40.7) pg/ml, p<0.001) concentrations was seen in this group. No changes in lipid profile, IL6, or CRP levels were seen in the placebo group. CONCLUSIONS: TNF neutralisation with monoclonal anti-TNF antibodies increased HDL-cholesterol levels and decreased CRP and IL6 levels after 2 weeks. Therefore this treatment may improve the cardiovascular risk profile of patients with RA.

Adalimumab↗
PubMed2004

Toll-like receptor-4 Asp299Gly polymorphism does not influence progression of atherosclerosis in patients with familial hypercholesterolaemia.

BACKGROUND: Toll-like receptor-4 (TLR4) is a major receptor for inflammatory stimuli potentially involved in the pathogenesis of atherosclerosis, such as lipopolysaccharide (LPS) and heat-shock proteins. The Asp299Gly polymorphism of the TLR4 gene has been associated with a reduced intima-media thickness (IMT) of the common carotid artery in healthy individuals. We have investigated whether the presence of the Asp299Gly polymorphism in patients with familial hypercholesterolaemia (FH) has a similar protective effect, and whether it influences the effects of HMG-CoA reductase treatment. MATERIALS AND METHODS: A cohort of 293 FH patients and 200 healthy volunteers were genotyped for the presence of the Asp299Gly allele using polymerase chain reaction followed by restriction fragment length polymorphism analysis. Intima-media thickness measurements, inflammatory parameters and the effect of HMG-CoA reductase inhibitors were compared between the patients with and without Asp299Gly allele. RESULTS: The Asp299Gly allele was present in 10.6% of the FH patients and 11.0% of the healthy individuals. Whereas the FH patients carrying the Asp299Gly allele displayed a reduced absolute IMT value compared with the FH patients carrying the wild-type allelle, the difference did not reach statistical significance. In addition, the effect of treatment with HMG-CoA reductase inhibitors was not influenced by the presence of Asp299Gly allele. CONCLUSION: The presence of the Asp299Gly allele of the TLR4 gene does not seem to exert a major influence on the progression of atherosclerosis in patients with FH.

Adult↗
PubMed2004

A boy with autosomal recessive hypercholesterolaemia.

We describe a 9-year-old Iranian boy with tuberous xanthomas, elevated LDL-cholesterol levels of 15.5 mmol/l, and vague complaints of chest pain while playing soccer. The consanguineous parents of the boy had normal cholesterol concentrations, which indicated an autosomal recessive disorder rather than autosomal dominant familial hypercholesterolaemia. The diagnosis of autosomal recessive hypercholesterolaemia (ARH) was confirmed by the presence of a mutation in the phosphotyrosine binding domain of a putative adaptor protein, which prevents normal internalisation of the LDL receptor (LDLR) in the liver. The clinical phenotype of ARH is similar to that of classical homozygous familial hypercholesterolaemia caused by defects in the LDLR gene, but it is more variable, generally less severe, and more responsive to lipid-lowering therapy. The patient's complaints of chest pain were not caused by ischaemia as was tested by an exercise and 24-hour electrocardiogram and by a myocardial perfusion scan. His LDL-C dropped by about 6o% after being treated with a combination of 40 mg atorvastatin and 10 mg ezetimibe.

Child↗
PubMed2004

Vascular graft infection in aortoiliac and aortofemoral bypass surgery: clinical presentation, diagnostic strategies and results of surgical treatment.

OBJECTIVES: Evaluation of the prevalence, diagnostic procedures and clinical outcome of infections of aortoiliac and aortofemoral vascular grafts presented in our centre. DESIGN: Retrospective study. MATERIALS: All patients who underwent a surgical aortoiliac or aortofemoral revascularisation between 1991 and 2001. METHODS: Evaluation of several hospital databases. RESULTS: 32 cases of aortoiliac and aortofemoral vascular graft infection with varied clinical presentation were found. Enteral bleeding was the first clinical manifestation in 31% of the cases, inguinal swelling, wound, or fistula in 59% and fever or sepsis in 6.3%. In 3% the cause was unknown. The vast majority (84.5%) of the infections presented three or more months after surgery (late infections). In cases of enteral bleeding, endoscopy procedures only revealed the diagnosis in 55%. Diagnostic algorithms including an abdominal CT scan appeared to have a sensitivity of 94% for establishing an accurate diagnosis. Remarkably, no specific risk factors for graft infection could be demonstrated. Furthermore, a 30-day survival of 20% or less was observed in early graft infections, whereas late infections managed with extra-anatomical bypasses appeared to have a better survival rate of up to 70%. CONCLUSION: Endoscopy in cases of enteral bleeding and CT scanning overall were shown to be very useful for establishing the diagnosis. Clinical outcome and survival after treatment remain poor.

Aged↗
PubMed2003

[Diagnosis of 5 patients with possible primary hemochromatosis].

In a 49-year-old man and a 28-year-old woman, both of whom complained of fatigue, HFE-gen related respectively non-HFE-gen related primary haemochromatosis was diagnosed, based on the elevated serum transferrin saturation, the elevated serum ferritin levels, DNA studies and liver biopsy with qualitative respectively quantitative iron measurements. Their complaints diminished after bloodletting. Three women respectively 64, 61 and 46 years of age, were also suspected of primary haemochromatosis. The latter two presented with complaints of fatigue and malaise and chronic hepatitis C respectively. All three showed an elevated serum transferrin saturation and serum ferritin concentration. Further investigation showed the presence of secundary iron overload. Causes for it being excessive alcohol consumption, overweight and a poorly regulated diabetes mellitus type 2, and chronic hepatitis C respectively. These patients received specific therapy. Primary haemochromatosis is a common disorder of iron metabolism in individuals of Northern European descent. Diagnosis is based on an elevated serum transferrin saturation in combination with both elevated serum ferritin levels and homozygosity for the Cys282Tyr-mutation in the HFE-gen. The presence of an elevated serum transferrin saturation in combination with an elevated serum ferritin level is not always sufficient for the diagnosis, since these may be affected by other disorders. Moreover, iron overload may be caused by a form of haemochromatosis that is not HFE-related. In case of doubt as to the diagnosis, histological examination of the liver with a qualitative or quantitative iron determination is the golden standard.

Adult↗
PubMed2003

Plasma homocysteine in subjects with familial combined hyperlipidemia.

Familial combined hyperlipidemia (FCH) is characterised by hypercholesterolemia and/or hypertriglyceridemia and associated with an increased risk of cardiovascular disease (CVD). The plasma lipid and lipoprotein levels in subjects with FCH are relatively moderately elevated and do not fully explain the increased risk of CVD. Hyperhomocysteinemia is a disorder of methionine metabolism and also a well-known independent risk factor for CVD. We investigated whether subjects with FCH have higher plasma homocysteine concentrations than controls, and whether homocysteine contributes to the increased risk of CVD in FCH. Furthermore we evaluated whether parameters of lipid and lipoprotein metabolism and/or insulin resistance are associated with the homocysteine level. In total 667 subjects, including 161 subjects with FCH, 109 spouses who referenced as control group and 397 normolipidemic relatives were studied. FCH was defined by the presence of plasma total cholesterol and/or triglyceride levels above the 90th percentile adjusted for age and gender. The mean homocysteine concentration of the FCH group did not significantly differ from the control group. The risk for CVD due to hyperhomocysteinemia in subjects with FCH was not higher than in subjects without FCH. No associations were observed between plasma homocysteine concentration and plasma lipid and lipoprotein levels, including small dense low density lipoprotein, nor between homocysteine concentration and insulin resistance.

Adult↗