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Study Reveals How Mitochondrial Damage in Muscle Fuels Diabetes Progression - Video

Published On 2025-05-06T08:15:00+05:30  |  Updated On 6 May 2025 3:49 PM IST
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Overview

A new study has revealed critical insights into how impaired mitochondrial dynamics and quality control mechanisms in skeletal muscle influence insulin sensitivity in patients with Type 2 Diabetes. The findings are published in the Journal of Cachexia, Sarcopenia and Muscle. ​
The research team focused on the significance of deubiquitinating enzymes, or DUBs, in regulating mitochondrial dynamics within skeletal muscle.
Findings suggest that mitochondrial fragmentation can bypass defects in mitophagy, the process by which cells remove damaged mitochondria, to sustain skeletal muscle quality control in patients with Type 2 Diabetes.
This adaptation may help maintain mitochondrial function despite impaired mitophagy.​
In other words, the study shows that people with Type 2 Diabetes have fewer healthy mitochondria, the parts of the cell that produce energy, because a certain protein - dynamin-related protein 1, or DRP1 - is working too much.
In addition, another group of proteins - DUBs - are shown to interfere with a process that helps the body clean up damaged mitochondria.
This interference makes it harder for muscles to use insulin properly, which is a key issue in diabetes.
The research findings advance the understanding of how impaired mitochondrial dynamics and quality control may contribute to skeletal muscle insulin resistance and the manifestation of Type 2 Diabetes, and also provides key evidence that DUB antagonists may play an important role in preventing or treating Type 2 Diabetes.
"Our research team examined how certain enzymes affect mitochondria in muscle cells of people with diabetes," said Dr. Kirwan, Executive Director and George A. Bray, Jr. Endowed Super Chair in Nutrition at Pennington Biomedical. "We found that when the normal cleanup process for damaged mitochondria isn't working well, the cells adapt by breaking mitochondria into smaller pieces. This alternative approach helps maintain muscle function despite the metabolic challenges of Type 2 diabetes. Our study highlights the complex interplay between mitochondria and insulin, paving the way for future interventions aimed at improving metabolic health."
Reference: https://www.pbrc.edu//news/media/2025/journal-of-cachexia-sarcopenia-and-muscle.aspx

Speakers

Dr. Garima Soni

BDS, MDS(orthodontics)

Dr. Garima Soni holds a BDS (Bachelor of Dental Surgery) from Government Dental College, Raipur, Chhattisgarh, and an MDS (Master of Dental Surgery) specializing in Orthodontics and Dentofacial Orthopedics from Maitri College of Dentistry and Research Centre. At medical dialogues she focuses on dental news and dental and medical fact checks against medical/dental mis/disinformation
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