Full metadata record
DC Field | Value | Language |
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dc.contributor.author | 정희용 | - |
dc.date.accessioned | 2018-04-14T10:47:56Z | - |
dc.date.available | 2018-04-14T10:47:56Z | - |
dc.date.issued | 2011-11 | - |
dc.identifier.citation | Free Radical Biology and Medicine, 2011, 51(9), P.1666-1674 | en_US |
dc.identifier.issn | 0891-5849 | - |
dc.identifier.uri | https://www.sciencedirect.com/science/article/pii/S0891584911004722?via%3Dihub | - |
dc.description.abstract | Metallothioneins (MTs) are intracellular low-molecular-weight, cysteine-rich proteins with potent metal-binding and redox functions, but with limited membrane permeativity. The aim of this study was to investigate whether we could enhance delivery of MT-1 to pancreatic islets or beta cells in vitro and in vivo. The second goal was to determine whether increased MT-1 could prevent cellular toxicity induced by high glucose and free fatty acids in vitro (glucolipotoxicity) and ameliorate the development of diabetes induced by streptozotocin in mice or delay the development of diabetes by improving insulin secretion and resistance in the OLETF rat model of type 2 diabetes. Expression of HIV-1 Tat-MT-1 enabled efficient delivery of MT into both INS-1 cells and rat islets. Intracellular MT activity increased in parallel with the amount of protein delivered to cells. The formation of reactive oxygen species, glucolipotoxicity, and DNA fragmentation due to streptozotocin decreased after treating pancreatic beta cells with Tat-MT in vitro. Importantly, in vivo, intraperitoneal injection resulted in delivery of the Tat-MT protein to the pancreas as well as liver, muscle, and white adipose tissues. Multiple injections increased radical-scavenging activity, decreased apoptosis, and reduced endoplasmic reticulum stress in the pancreas. Treatment with Tat-MT fusion protein delayed the development of diabetes in streptozotocin-induced mice and improved insulin secretion and resistance in OLETF rats. These results suggest that in vivo transduction of Tat-MT may offer a new strategy to protect pancreatic beta cells from glucolipotoxicity, may improve insulin resistance in type 2 diabetes, and may have a protective effect in preventing islet destruction in type 1 diabetes. (C) 2010 Elsevier Inc. All rights reserved. | en_US |
dc.description.sponsorship | This research was supported by the Basic Science Research Program of the National Research Foundation of Korea funded by the Ministry of Education, Science, and Technology (2010-0010898) and the Korea Health 21 R&D Project, Ministry of Health and Welfare, Republic of Korea (A00044986). | en_US |
dc.language.iso | en | en_US |
dc.publisher | Elsevier Science INC | en_US |
dc.subject | Protein transduction technology | en_US |
dc.subject | Metallothionein | en_US |
dc.subject | Oxidative stress | en_US |
dc.subject | ER stress | en_US |
dc.subject | NF-kappa B | en_US |
dc.subject | Diabetes mellitus | en_US |
dc.subject | Insulin secretion | en_US |
dc.subject | Insulin resistance | en_US |
dc.subject | Free radicals | en_US |
dc.title | Tat-enhanced delivery of metallothionein can partially prevent the development of diabetes | en_US |
dc.type | Article | en_US |
dc.relation.no | 9 | - |
dc.relation.volume | 51 | - |
dc.identifier.doi | 10.1016/j.freeradbiomed.2011.07.019 | - |
dc.relation.page | 1666-1674 | - |
dc.relation.journal | Free Radical Biology and Medicine | - |
dc.contributor.googleauthor | Park, L. | - |
dc.contributor.googleauthor | Min, D. | - |
dc.contributor.googleauthor | Kim, H. | - |
dc.contributor.googleauthor | Chung, H. Y. | - |
dc.contributor.googleauthor | Lee, C. H. | - |
dc.contributor.googleauthor | Park, I. S. | - |
dc.contributor.googleauthor | Kim, Y. | - |
dc.contributor.googleauthor | Park, Y. | - |
dc.relation.code | 2011203318 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF MEDICINE[S] | - |
dc.sector.department | DEPARTMENT OF MEDICINE | - |
dc.identifier.pid | hychung | - |
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