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Eyes are windows to study body glucose levels

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Eyes are windows to study body glucose levels
Eyes are windows to study body glucose levels

Washington – Researchers have said that by transferring the vital insulin-producing cells from the pancreas to the eye, the latter can serve as a kind of window through which health reports can be obtained from the former.

The endocrine part of the pancreas, the Islets of Langerhans, produces and secretes insulin, the hormone that regulates blood sugar levels.

After a meal, the hormone is released into the blood at an amount that is in direct proportion to the amount of food ingested; blood insulin levels therefore vary from one meal to the next and between individuals.

In the case of conditions such as obesity, large amounts of insulin are needed to compensate for the high consumption of food and insensitivity to the hormone.

The Islets of Langerhans try to adapt themselves to this condition by increasing the number of insulin-producing beta-cells and/or modulating their individual secretion of insulin in response to the intake of sugar.

This plasticity is essential to the maintenance of normal blood sugar levels, and its dysfunction leads to diabetes, a serious disease that has reached pandemic proportions.

The greatest obstacle to studying the exact workings of the Islets of Langerhans and how they adapt to individual conditions is their relative inaccessibility, in that they lie deeply embedded in and are distributed throughout the tissue.

Now, however, researchers have found a new way to study the insulin-producing beta-cells: by transferring the Islets of Langerhans to the eye.

Per-Olof Berggren, professor of experimental endocrinology at Karolinska Institutet’s Department of Molecular Medicine and Surgery, and director of the Rolf Luft Research Centre for Diabetes and Endocrinology, said what they did is made the cells optically accessible by grafting a small number of ‘reporter islets’ into the eyes of mice, which allows us to monitor the activity of the pancreas just by looking into the eye.

He said that they’re now able to really study the insulin-producing beta-cells in detail in a way that wasn’t possible before.

The results have been published in the scientific journal PNAS.

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