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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Peng, H. Olsen, G. Tamura, Y. Noguchi, H. Matsumoto, S. Levy, M. F. Naziruddin, B. |
| Description | Country affiliation: United States Author Affiliation: Peng H ( Institute of Biomedical Studies, Baylor University, Waco, Texas, USA.) |
| Abstract | BACKGROUND: After islet cell transplantation, a substantial mass of islets are lost owing to nonspecific inflammatory reactions. Cytokine exposure before or after transplantation can upregulate expression of proinflammatory genes via the nuclear factor-kappaB signaling pathway, eventually resulting in islet loss. OBJECTIVE: To test the effects of a naturally occurring nuclear factor-kappaB inhibitor, withaferin A, on regulation of inflammatory genes in human islets. METHODS: Human pancreatic islets were isolated using a modified Ricordi protocol. Purified islets were cultured for 2 days. The effect of withaferin A treatment on islet cell viability was examined using the fluorescein diacetate-propidium iodide dye exclusion test, and on function using a static glucose stimulation assay. Islet cells were treated with a cytokine mixture (50 U/mL of interleukin-1beta, 1000 U/mL of tumor necrosis factor-alpha, and 1000 U/mL of interferon-gamma) for 48 hours with or without withaferin A, 1 microg/mL. Treated islets were used for real-time polymerase chain reaction (PCR) array analysis for expression of inflammatory genes, and expression of other selected genes was analyzed using real-time PCR with single primers. RESULTS: Glucose stimulation and viability assays demonstrated that withaferin A was not toxic to islet cells. Of 84 inflammation-related genes examined using real-time PCR array analysis, 9 were significantly upregulated by cytokine treatment compared with the control group. However, addition of withaferin A to the culture significantly inhibited expression of all genes. CONCLUSION: Withaferin A significantly inhibits the inflammatory response of islet cells with cytokine exposure. |
| File Format | HTM / HTML |
| ISSN | 00411345 |
| Issue Number | 6 |
| Volume Number | 42 |
| e-ISSN | 18732623 |
| Journal | Transplantation Proceedings |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2010-07-01 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Transplantation__semicolon__medicine Inflammation Prevention & Control Islets Of Langerhans Transplantation Pathology Islets Of Langerhans Cytology Withanolides Pharmacology Cadaver Cell Culture Techniques Cell Separation Methods Cell Survival Drug Effects Physiology Cytokines Gene Expression Regulation Glucose Humans Genetics Reverse Transcriptase Polymerase Chain Reaction Tissue Donors Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Transplantation Surgery |
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