OBJECTIVE To study the effect of acute myocardial infarction (AMI) on plasma homocystein (Hcy) levels, to determine the optimal time to measure this risk factor for coronary artery disease. DESIGN A prospective case study. SETTING The Division of Cardiac Sciences, Grey Nuns Hospital in Edmonton. PATIENTS Sixty-two patients (40 men, 22 women) admitted to hospital with AMI. INTERVENTION M...

BACKGROUND Plasma homocysteine (Hcy) levels are increased in patients with Parkinson's disease (PD) undergoing levodopa treatment. We measured the Hcy levels in PD patients and assessed the relationship between Hcy level and features of PD, cognitive function and vitamin B status. METHODS Concentrations of Hcy, vitamin B12 and folate were measured in 33 PD patients and 41 normal control indiv...

OBJECTIVE To evaluate plasma homocysteine (Hcy) levels and prevalence rates of hyperhomocysteinaemia (HHCY) in elderly Chinese individuals. DESIGN A cross-sectional study. SETTING The study was conducted in 2006 in two counties from the north and the south of China. SUBJECTS A total of 810 individuals aged 65-74 years were recruited. Demographic characteristics and lifestyle factors were ...

Hyperhomocysteinemia (HHcy) is an independent risk factor for coronary artery disease. Emerging evidence suggests that HHcy is also associated with adipocyte tissue dysfunction. One of the principal functions of adipose tissue is to provide energy substrate via lipolysis. In the present study, we investigated the effects of homocysteine (Hcy) on lipolysis in adipocytes. We found that Hcy inhibi...

To determine the reductive process of extracellular dehydroascorbic acid (DHA), molecules (homocysteine, homocysteine thiolactone, methionine, cysteine, and homoserine) were tested to identify those with the potential to reduce DHA to ascorbic acid (AA). Homocysteine (Hcy) was the most potent of the molecules tested. The efficacy of Hcy was compared with that of other molecules able to reduce D...

BACKGROUND Hyperhomocysteinemia is an independent risk factor for atherosclerotic diseases including Ischaemic heart disease, stroke and peripheral vascular disease. Homocysteine (Hcy) is an intermediate formed during the catabolism of essential sulphur containing amino acid methionine, increased Hcy is associated with endothelial dysfunctions in healthy human. Plasma Hcy is significantly lower...

Homocysteine (Hcy) is regarded as a risk factor for hypertension, but research on the causal relationship between Hcy and hypertension is limited. In the present study, we prospectively tracked the blood pressure progression of a normotensive population with different Hcy levels over a 2-year period. The incidence of hypertension with increasing Hcy quartiles produced an approximately U-shaped ...

OBJECTIVE It has been suggested that cardiac surgery-related ischemia-reperfusion injury to the myocardium is caused by the oxidative stress, derived from the formation of reactive oxygen species in the early phases of the reperfusion. The availability of cysteine, mostly deriving from homocysteine (Hcy) via the trans-sulfuration pathway, is determinant for the synthesis of glutathione (GSH), w...

AIMS Statins can ameliorate atherosclerosis by inhibition of cholesterol biosynthesis or by modulation of inflammation. In earlier work, we showed that homocysteine (Hcy) reduced synthesis of apolipoprotein A-I (ApoA-I). Our goal in this study was to determine whether Hcy could interfere with the ability of simvastatin to increase ApoA-I synthesis or to modify statin-dependent regulation of inf...

OBJECTIVES Cardioankle vascular index (CAVI) is a new index of arterial stiffness independent of immediate blood pressure. Homocysteine (Hcy) is an independent risk factor for vascular diseases. The aim of this study was to investigate the relationship between Hcy and CAVI in the vascular-related diseases. DESIGN Descriptive research. PARTICIPANTS 88 patients (M/F 46/42) with or without hyp...