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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Won, Tae Joon Jung, Yu Jin Kwon, Seok Joong Lee, Yoon Jeong Lee, Do Ik Min, Hyeyoung Park, Eon Sub Joo, Seong Soo Hwang, Kwang Woo |
| Description | Author Affiliation: Won TJ ( Chung-Ang University, Seoul, Korea.) |
| Abstract | Programmed death-1 (PD-1) is a co-inhibitory receptor of the CD28/CTLA-4 family which is expressed on activated T cells and inhibits T cell activation after binding to PD-1 ligands. In animal models, PD-1 regulates autoimmune disease and induces tolerance in pancreas. In this study the effects of PD-1 on type 1 diabetes were examined using PD-1 transgenic mice (Tg). The incidence of autoimmune diabetes induced by multiple low dose of streptozotocin (STZ) was reduced in PD-1 Tg mice. Although the expression of CTLA-4, PD-1 and FoxP3, which are inhibitory molecules of activated T cells, is reduced only on STZ injected wild type (WT) mice, CD4, CD8 and regulatory T cell populations were not changed in all experimental groups. When splenocytes were re-stimulated in ex vivo, the production of IL-2 and IFN-γ and the T cell proliferation were increased in all STZ injected mice, but the increment rate was less in PD-1 Tg groups. Interestingly, macrophages were observed in splenocytes of STZ injected PD-1 Tg at somewhat lower level than macrophage in diabetic wild type mice. In this research, we found out that total numbers of T cell in the experimental groups are not changed, but T cell function is changed, and FoxP3 expression is decreased in pancreas and spleen of diabetes-induced groups. Macrophage frequency might also affects on type 1 diabetes. Although more experimental evidence needs to be provided, these results suggest that ligation of PD-1 and PD-L1/2 may have an effect on macrophages as well as does T cells. |
| File Format | HTM / HTML |
| ISSN | 02536269 |
| Issue Number | 11 |
| Volume Number | 33 |
| e-ISSN | 19763786 |
| Journal | Archives of Pharmacal Research |
| Language | English |
| Publisher | Springer |
| Publisher Date | 2010-11-01 |
| Publisher Place | Korea (South) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Pharmacology Antigens, Cd Metabolism Antigens, Surface Apoptosis Regulatory Proteins Diabetes Mellitus, Experimental Prevention & Control Diabetes Mellitus, Type 1 Lymphocyte Activation T-lymphocytes Animals Immunology Antigens, Cd274 Antigens, Cd80 Genetics Cd4-positive T-lymphocytes Cd8-positive T-lymphocytes Ctla-4 Antigen Gene Expression Immune Tolerance Interferon-gamma Interleukin-2 Macrophages Male Membrane Glycoproteins Mice Mice, Inbred C57bl Mice, Transgenic Peptides Programmed Cell Death 1 Ligand 2 Protein Programmed Cell Death 1 Receptor Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Organic Chemistry Drug Discovery Molecular Medicine |
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