Frataxin deficiency in pancreatic islets causes diabetes due to loss of beta cell mass
(2003) In Journal of Clinical Investigation 112(4). p.527-534- Abstract
- Diabetes is caused by an absolute (type 1) or relative (type 2) deficiency of insulin-producing beta cells. We have disrupted expression of the mitochondrial protein frataxin selectively in pancreatic beta cells. Mice were born healthy but subsequently developed impaired glucose tolerance progressing to overt diabetes mellitus. These observations were explained by impairment of insulin secretion due to a loss of beta cell mass in knockout animals. This phenotype was preceded by elevated levels of reactive oxygen species in knockout islets, an increased frequency of apoptosis, and a decreased number of proliferating beta cells. Hence, disruption of the frataxin gene in pancreatic beta cells causes diabetes following cellular growth arrest... (More)
- Diabetes is caused by an absolute (type 1) or relative (type 2) deficiency of insulin-producing beta cells. We have disrupted expression of the mitochondrial protein frataxin selectively in pancreatic beta cells. Mice were born healthy but subsequently developed impaired glucose tolerance progressing to overt diabetes mellitus. These observations were explained by impairment of insulin secretion due to a loss of beta cell mass in knockout animals. This phenotype was preceded by elevated levels of reactive oxygen species in knockout islets, an increased frequency of apoptosis, and a decreased number of proliferating beta cells. Hence, disruption of the frataxin gene in pancreatic beta cells causes diabetes following cellular growth arrest and apoptosis, paralleled by an increase in reactive oxygen species in islets. These observations might provide insight into the deterioration of beta cell function observed in different subtypes of diabetes in humans. (Less)
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https://lup.lub.lu.se/record/303447
- author
- organization
- publishing date
- 2003
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Clinical Investigation
- volume
- 112
- issue
- 4
- pages
- 527 - 534
- publisher
- The American Society for Clinical Investigation
- external identifiers
-
- pmid:12925693
- wos:000184833900012
- ISSN
- 0021-9738
- DOI
- 10.1172/JCI200318107
- language
- English
- LU publication?
- yes
- id
- 70aa6df3-5680-4b9a-a0b1-d5851a54b41d (old id 303447)
- date added to LUP
- 2016-04-01 17:11:00
- date last changed
- 2021-08-02 04:00:28
@article{70aa6df3-5680-4b9a-a0b1-d5851a54b41d, abstract = {{Diabetes is caused by an absolute (type 1) or relative (type 2) deficiency of insulin-producing beta cells. We have disrupted expression of the mitochondrial protein frataxin selectively in pancreatic beta cells. Mice were born healthy but subsequently developed impaired glucose tolerance progressing to overt diabetes mellitus. These observations were explained by impairment of insulin secretion due to a loss of beta cell mass in knockout animals. This phenotype was preceded by elevated levels of reactive oxygen species in knockout islets, an increased frequency of apoptosis, and a decreased number of proliferating beta cells. Hence, disruption of the frataxin gene in pancreatic beta cells causes diabetes following cellular growth arrest and apoptosis, paralleled by an increase in reactive oxygen species in islets. These observations might provide insight into the deterioration of beta cell function observed in different subtypes of diabetes in humans.}}, author = {{Ristow, M and Mulder, Hindrik and Pomplun, D and Schulz, T and Muller-Schmehl, K and Krause, A and Fex, Malin and Puccio, H and Muller, J and Isken, F and Spranger, J and Muller-Wieland, D and Magnuson, MA and Mohlig, M and Koenig, M and Pfeiffer, AFH}}, issn = {{0021-9738}}, language = {{eng}}, number = {{4}}, pages = {{527--534}}, publisher = {{The American Society for Clinical Investigation}}, series = {{Journal of Clinical Investigation}}, title = {{Frataxin deficiency in pancreatic islets causes diabetes due to loss of beta cell mass}}, url = {{http://dx.doi.org/10.1172/JCI200318107}}, doi = {{10.1172/JCI200318107}}, volume = {{112}}, year = {{2003}}, }