PMID- 25660120 OWN - NLM STAT- MEDLINE DCOM- 20151203 LR - 20181202 IS - 1432-0428 (Electronic) IS - 0012-186X (Linking) VI - 58 IP - 4 DP - 2015 Apr TI - Disruption of CR6-interacting factor-1 (CRIF1) in mouse islet beta cells leads to mitochondrial diabetes with progressive beta cell failure. PG - 771-80 LID - 10.1007/s00125-015-3506-y [doi] AB - AIM/HYPOTHESIS: Although mitochondrial oxidative phosphorylation (OxPhos) dysfunction is believed to be responsible for beta cell dysfunction in insulin resistance and mitochondrial diabetes, the mechanisms underlying progressive beta cell failure caused by defective mitochondrial OxPhos are largely unknown. METHODS: We examined the in vivo phenotypes of beta cell dysfunction in beta cell-specific Crif1 (also known as Gadd45gip1)-deficient mice. CR6-interacting factor-1 (CRIF1) is a mitochondrial protein essential for the synthesis and formation of the OxPhos complex in the inner mitochondrial membrane. RESULTS: Crif1(beta-/-) mice exhibited impaired glucose tolerance with defective insulin secretion as early as 4 weeks of age without defects in islet structure. At 11 weeks of age, Crif1(beta-/-) mice displayed characteristic ultrastructural mitochondrial abnormalities as well as severe glucose intolerance. Furthermore, islet area and insulin content was decreased by approximately 50% compared with wild-type mice. Treatment with the glucoregulatory drug exenatide, a glucagon-like peptide-1 (GLP-1) agonist, was not sufficient to preserve beta cell function in Crif1(beta-/-) mice. CONCLUSIONS/INTERPRETATION: Our results indicate that mitochondrial OxPhos dysfunction triggers progressive beta cell failure that is not halted by treatment with a GLP-1 agonist. The Crif1(beta-/-) mouse is a useful model for the study of beta cell failure caused by mitochondrial OxPhos dysfunction. FAU - Kim, Yong Kyung AU - Kim YK AD - Research Center for Endocrine and Metabolic Diseases, Chungnam National University School of Medicine, Daejeon, 301-721, Korea. FAU - Joung, Kyong Hye AU - Joung KH FAU - Ryu, Min Jeong AU - Ryu MJ FAU - Kim, Soung Jung AU - Kim SJ FAU - Kim, Hyeongseok AU - Kim H FAU - Chung, Hyo Kyun AU - Chung HK FAU - Lee, Min Hee AU - Lee MH FAU - Lee, Seong Eun AU - Lee SE FAU - Choi, Min Jeong AU - Choi MJ FAU - Chang, Joon Young AU - Chang JY FAU - Hong, Hyun Jung AU - Hong HJ FAU - Kim, Koon Soon AU - Kim KS FAU - Lee, Sang-Hee AU - Lee SH FAU - Kweon, Gi Ryang AU - Kweon GR FAU - Kim, Hail AU - Kim H FAU - Lee, Chul-Ho AU - Lee CH FAU - Kim, Hyun Jin AU - Kim HJ FAU - Shong, Minho AU - Shong M LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20150208 PL - Germany TA - Diabetologia JT - Diabetologia JID - 0006777 RN - 0 (Blood Glucose) RN - 0 (Cell Cycle Proteins) RN - 0 (Crif1 protein, mouse) RN - 0 (Glucagon-Like Peptide-1 Receptor) RN - 0 (Hypoglycemic Agents) RN - 0 (Incretins) RN - 0 (Insulin) RN - 0 (Peptides) RN - 0 (Venoms) RN - 9P1872D4OL (Exenatide) SB - IM MH - Age Factors MH - Animals MH - Autophagy MH - Blood Glucose/metabolism MH - Cell Cycle Proteins/*deficiency/genetics MH - Cell Line MH - Diabetes Mellitus/drug therapy/genetics/*metabolism/pathology MH - Disease Models, Animal MH - Disease Progression MH - Exenatide MH - Genotype MH - Glucagon-Like Peptide-1 Receptor/agonists/metabolism MH - Hypoglycemic Agents/pharmacology MH - Incretins/pharmacology MH - Insulin/blood MH - Insulin-Secreting Cells/drug effects/*metabolism/ultrastructure MH - Mice, Inbred C57BL MH - Mice, Knockout MH - Mitochondria/drug effects/*metabolism/ultrastructure MH - *Oxidative Phosphorylation MH - Peptides/pharmacology MH - Phenotype MH - Time Factors MH - Venoms/pharmacology EDAT- 2015/02/11 06:00 MHDA- 2015/12/15 06:00 CRDT- 2015/02/10 06:00 PHST- 2014/09/24 00:00 [received] PHST- 2014/12/30 00:00 [accepted] PHST- 2015/02/10 06:00 [entrez] PHST- 2015/02/11 06:00 [pubmed] PHST- 2015/12/15 06:00 [medline] AID - 10.1007/s00125-015-3506-y [doi] PST - ppublish SO - Diabetologia. 2015 Apr;58(4):771-80. doi: 10.1007/s00125-015-3506-y. Epub 2015 Feb 8.