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20 March 2013
PCOS puts blood sugar levels in double jeopardy

Polycystic ovary syndrome (PCOS), affecting about 10 percent of women, appears to cause a sort of double jeopardy for those struggling the hardest to control blood sugar levels, researchers report in the latest Journal of Clinical Endocrinology & Metabolism.

Humans use insulin and other non-insulin mechanisms to convert blood sugar, or glucose, into energy and control levels in the blood, where it becomes a destructive force.

The new study shows that women with PCOS had the most difficulty controlling glucose via insulin and were also the ones with declines in their ability to use non-insulin approaches. More typically, when insulin resistance increases, the body's non-insulin dependent usage increases, apparently to help compensate. In these women, non-insulin activity was essentially unchanged except in those with the most insulin resistance, where it dropped.

"Women with PCOS who have the highest levels of insulin resistance, the greatest difficulty controlling their sugar and the highest risk for diabetes, appear to have a double defect in how glucose is controlled, which affects both the mechanisms that use insulin and those that do not," explained researcher Ricardo Azziz.

While the amount of fat around the internal organs, called visceral fat, predicted the degree to which insulin had difficulty controlling glucose, the regulation of glucose by non-insulin means was more closely associated with the amount of fat under the skin, or subcutaneous fat.

"If the fat is not as sensitive to insulin, that obviously means blood sugar levels, and probably fat and cholesterol levels as well, increase and the pancreas responds by producing more insulin," Azziz said. "Fat abnormalities can have a tremendous impact on how we feel and how we function."

The body uses insulin to convert sugar into energy for the cells in response to eating, stress or other acute causes of blood sugar increases. Fat is a big user of this approach. However, some tissues, such as the brain, red blood cells and adrenal gland, don't require insulin to convert glucose to energy.

"That's one reason why regulating only insulin does not cure diabetes," said Azziz, noting that when fasting, about 80 percent of the body's glucose usage occurs independent of insulin.

Related:
Discuss this article in our forum
Polycystic Ovarian Syndrome - The Hidden Epidemic
Obesity gene linked to PCOS
Overcoming PCOS
PCOS May Begin In The Womb

Source: Medical College of Georgia at Georgia Regents University


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