Novel -209A/G MT2A polymorphism in old patients with type 2 diabetes and atherosclerosis: relationship with inflammation (IL-6) and zinc

Biogerontology
Robertina GiacconiEugenio Mocchegiani

Abstract

Vascular complications, including ischaemic cardiomyopathy, are the major causes of death in old diabetic patients. Chronic inflammation due to high IL-6 production occurs in type 2 diabetes (NIDDM) and atherosclerosis. High levels of IL-6 are associated with hyperglycaemia, dyslipidemia and provoke insulin resistance. In ageing and inflammation, IL-6 affects Metallothionein (MT) homeostasis, which in turn is involved in zinc turnover. Zinc deficiency is an usual event in ageing, inflammation, type 2 diabetes and atherosclerosis. No genetic study exists on MT polymorphisms in NIDDM-atherosclerotic patients. The aim of the present study is to screen a single nucleotide polymorphism in the promoter region of the MT2A gene in relation to inflammation (IL-6) and plasma zinc in NIDDM-atherosclerotic patients. The -209 A/G MT2A polymorphism is associated with chronic inflammation (higher plasma levels of IL-6), hyperglycaemia, enhanced HbA1c and more marked zinc deficiency in AA than AG genotype carrying patients. Analysing patients and controls subdivided in AA and AG genotypes, significant interactions existed between disease status and genotypes for glucose and zinc. AA patients are more at risk of developing NIDDM in association ...Continue Reading

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