Damaged Fat Cells Vanish, Triggering Diabetes
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- Michigan Medicine researchers found that damaged fat cells become inflamed, lose their lipid-storage ability, and eventually vanish — disrupting metabolism and triggering diabetes — in a study published in the Journal of Clinical Investigation.
- Familial partial lipodystrophy type 2 (FPLD2) drove the research: the team built a mouse model by switching off the lamin A/C gene in adipocytes and compared findings to tissue donated by FPLD2 patients.
- Jessica Maung, Ph.D. reported diseased adipocytes and surrounding immune cells shifted into a pro-inflammatory state while mitochondria inside fat cells stopped functioning normally — what Maung called "a perfect environment for the tissue to be really unhealthy and eventually disappear."
- Elif Oral, M.D. argued the findings reframe Type 2 diabetes as "actually a disease of fat cells, too" — not solely a disease of insulin-producing beta cells in the pancreas.
- Michigan Medicine researchers identified potential therapeutic targets aimed at protecting adipose tissue before it deteriorates, shifting the focus from managing blood sugar after metabolic damage to preserving fat cell health.
- Ormond MacDougald, Ph.D. called the work "an outstanding example" of collaboration between a translational clinician and a basic science physiologist, crediting FPLD2 patient involvement as essential to the discovery.
Why it matters: Oral argues Type 2 diabetes is also a fat cell disease, not just a beta cell disease — pointing to new therapeutic targets aimed at preserving adipose tissue before it disappears. The team tied fat cell death to mitochondrial failure and inflammatory gene programs, explaining how abnormal fat loss in FPLD2 leads to diabetes and fatty liver disease.
