High Level of Fetuin-A -protein Linked to Increased Diabetes Risk

A new study has shown that having a higher than normal level of fetuin-A, a protein produced in the liver and secreted into the blood stream, is linked to an increased risk of developing diabetes.

"Type 2 diabetes mellitus has become a global epidemic and the increased prevalence of obesity is a major contributing factor. However, diabetes does not develop in all obese individuals and there is a strong genetic contribution to risk," the authors said.

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"Despite significant recent advances, mechanisms responsible for individual differences in clinical phenotype remain largely unknown," they added.

Previous studies have found a link between higher fetuin-A levels and insulin resistance, but the association with incident type 2 diabetes mellitus is unknown.

To examine whether higher fetuin-A levels are associated with the occurrence of diabetes in older persons, Joachim H. Ix, M.D., M.A.S., of the University of California, San Diego, and San Diego Veterans Affairs Healthcare System, and colleagues conducted a study.

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It included 406 persons (age 70 to 79 years) without diabetes at the start of the study, and who had fetuin-A levels measured at baseline, and had six years of follow-up.

Diabetes developed in 135 participants (10.1 cases/1,000 person-years [the number of individuals in the study times the number of years of follow-up per person]).

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Analysis indicated a graded increase in the incidence of diabetes with increased fetuin-A levels.

The third of the group with the highest levels had more than twice the incidence rate compared with the lowest third (13.3 vs. 6.5 cases/1,000 person-years).

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The link was independent of physical activity, inflammatory biomarkers, and other commonly available measures of insulin resistance and was irrespective of sex, race, and obesity status.

The association was moderately weakened by adjustment for visceral adiposity - fat accumulation around the abdomen.

"Future studies should evaluate whether the results may generalize to middle-aged individuals in whom the [diabetes] incidence rate is highest. If confirmed in future studies, fetuin-A may ultimately prove useful as a target for therapeutics, and its study may provide novel insights to glucose metabolism in humans," the authors said.

The study is published in the July 9 issue of JAMA.

Source-ANI
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