{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T13:27:12Z","timestamp":1791466032324,"version":"4.3.4"},"reference-count":88,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2022,5,12]],"date-time":"2022-05-12T00:00:00Z","timestamp":1652313600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Ministry of Science and Culture of the State of Lower Saxony, Hannover, Germany"},{"name":"the AM Cohen Foundation"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Cells"],"abstract":"<jats:p>Diabetes mellitus is the most common endocrine disturbance in inherited mitochondrial diseases. It is essential to increase awareness of the correct diagnosis and treatment of diabetes in these patients and screen for the condition in family members, as diabetes might appear with distinctive clinical features, complications and at different ages of onset. The severity of mitochondrial-related diabetes is likely to manifest on a large scale of phenotypes depending on the location of the mutation and whether the number of affected mitochondria copies (heteroplasmy) reaches a critical threshold. Regarding diabetes treatment, the first-choice treatment for type 2 diabetes (T2D), metformin, is not recommended because of the risk of lactic acidosis. The preferred treatment for diabetes in patients with mitochondrial disorders is SGLT-2i and mitochondrial GLP-1-related substances. The tight relationship between mitochondrial dysfunction, reduced glucose-stimulated insulin secretion (GSIS), and diabetes development in human patients is acknowledged. However, despite the well-characterized role of mitochondria in GSIS, there is a relative lack of data in humans implicating mitochondrial dysfunction as a primary defect in T2D. Our recent studies have provided data supporting the significant role of the mitochondrial respiratory-chain enzyme, cytochrome c oxidase (COX), in regulating GSIS in a rodent model of T2D, the Cohen diabetic sensitive (CDs) rat. The nutritionally induced diabetic CDs rat demonstrates several features of mitochondrial diseases: markedly reduced COX activity in several tissues, increased reactive oxygen production, decreased ATP generation, and increased lactate dehydrogenase expression in islets. Moreover, our data demonstrate that reduced islet-COX activity precedes the onset of diabetes, suggesting that islet-COX deficiency is the primary defect causing diabetes in this model. This review examines the possibility of including T2D as a primary mitochondrial-related disease. Understanding the critical interdependence between diabetes and mitochondrial dysfunction, centering on the role of COX, may open novel avenues to diagnose and treat diabetes in patients with mitochondrial diseases and mitochondrial dysfunction in diabetic patients.<\/jats:p>","DOI":"10.3390\/cells11101617","type":"journal-article","created":{"date-parts":[[2022,5,12]],"date-time":"2022-05-12T03:28:43Z","timestamp":1652326123000},"page":"1617","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":24,"title":["Is Type 2 Diabetes a Primary Mitochondrial Disorder?"],"prefix":"10.3390","volume":"11","author":[{"given":"Sarah","family":"Weksler-Zangen","sequence":"first","affiliation":[{"name":"The Hadassah Diabetes Center, Hadassah Medical Center, Jerusalem 9112102, Israel"},{"name":"The Liver Research Laboratory, Hadassah Medical Center, Jerusalem 9112102, Israel"},{"name":"Faculty of Medicine Hebrew, University of Jerusalem, Jerusalem 9112102, Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,5,12]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1160","DOI":"10.1016\/j.cell.2012.02.010","article-title":"Diabetes mellitus and the beta cell: The last ten years","volume":"148","author":"Ashcroft","year":"2012","journal-title":"Cell"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1385","DOI":"10.1152\/physrev.00009.2016","article-title":"The Pancreatic beta-Cell: A Bioenergetic Perspective","volume":"96","author":"Nicholls","year":"2016","journal-title":"Physiol. 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