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Targeting endoplasmic reticulum stress may treat diabetes

Meghna A SinghaniaWritten by Meghna A Singhania Published On 2015-10-04T12:11:43+05:30  |  Updated On 4 Oct 2015 12:11 PM IST
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Washington D.C., (ANI): A new study has revealed that endoplasmic reticulum stress plays significant role in type 2 diabetes.

The endoplasmic reticulum (ER) is an organelle with several essential functions in eukaryotic cells. The ER is both a major intracellular calcium store and the place where proteins entering the secretory pathway are synthesized, folded, modified, and delivered to their final cell surface or extracellular destination.

In mammalian cells, the ER is the site of sterols and lipids synthesis. Disturbance in any of these functions, which results in the disruption of the proper folding and secretory capacity of the ER and increased load of unfolded proteins in its lumen, defines a condition known as "ER stress."

ER stress activates a complex and multifaceted intracellular signal transduction pathway that is essentially designed to reestablish ER homeostasis. Inability to restore ER functions induces cell death, which is usually in the form of apoptosis.

According to the study, when the endoplasmic reticulum (ER) compartment undergoes disruptions or stress patients experience poor glycemic control, dyslipidemia, insulin resistance and inflammatory and oxidative stress. Therefore, targeting ER stress might be an effective treatment strategy for type 2 diabetes.

Senior researcher Muthuswamy Balasubramanyam of the Madras Diabetes Research Foundation said that they observed a disharmonious stress signaling alliance' in diabetes, adding that the future of potential practical applications of their research was that this would lead to the development of 'chemical chaperones' as a new generation class of anti-diabetic agents that should improve ER folding capacity, help to stabilize protein conformation and ameliorate ER stress.

In the study, scientists identified several endoplasmic reticulum stress markers increased in cells from patients with type 2 diabetes as compared to healthy control subjects.

These endoplasmic reticulum stress markers also correlated significantly and positively with poor glycemic control, dyslipidemia, insulin resistance and inflammatory and oxidative stress markers.

They scientists found that one of the microRNAs called 'miR-146a' was also impaired and negatively correlated to endoplasmic reticulum stress and inflammation in patients with diabetes.

The study is published in the Journal of Leukocyte Biology. (ANI)
Meghna A Singhania
Meghna A Singhania

Meghna A Singhania is the founder and Editor-in-Chief at Medical Dialogues. An Economics graduate from Delhi University and a post graduate from London School of Economics and Political Science, her key research interest lies in health economics, and policy making in health and medical sector in the country. She is a member of the Association of Healthcare Journalists. She can be contacted at meghna@medicaldialogues.in. Contact no. 011-43720751

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