Document Detail

TGFβ(1) and sCTLA-4 levels are increased in eltrombopag-exposed patients with ITP.
MedLine Citation:
PMID:  22789125     Owner:  NLM     Status:  Publisher    
Some thrombopoietin receptor-agonists (TPR-As) have been developed and shown to be highly effective in the treatment of immune thrombocytopenic purpura (ITP). Soluble cytotoxic T-lymphocyte-associated antigen 4 (sCTLA-4) can modulate and terminate the immune response. Several reports have shown that sCTLA-4 levels are elevated in patients with some autoimmune disorders. However, sCTLA-4 levels have not previously been investigated in TPR-A exposed patients with ITP. We investigated the levels of transforming growth factor (TGF) β(1) and sCTLA-4 in ITP patients to determine the clinical association with TGFβ(1) and sCTLA-4 in TPR-A-exposed patients with ITP. Thirty-seven ITP patients were divided into 2 groups (TPR-A-exposed: 13 patients; unexposed: 24 patients). Doses of eltrombopag ranging from 12.5mg to 50mg were administered daily, and biochemical data obtained before and after eltrombopag administration were compared. Eltrombopag therapy significantly increased sCTLA-4 and TGFβ(1) levels relative to baseline in patients with ITP. In addition, plasma TGFβ(1) was positively correlated with platelet counts and sCTLA-4 in patients with ITP in the eltrombopag-exposed group. However, no significant change in the detection rate for anti-glycoprotein antibody was observed before and 24weeks after eltrombopag treatment. These results suggest that eltrombopag can partially modulate some immune responses by TGFβ(1) and sCTLA-4, but it does not induce immune tolerance by 24weeks after treatment.
Shinya Fujita; Takahisa Nakanishi; Hideaki Yoshimura; Masaaki Hotta; Naoto Nakamichi; Takeshi Tamaki; Kazuyoshi Ishii; Tomoki Ito; Shosaku Nomura
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-7-10
Journal Detail:
Title:  Thrombosis research     Volume:  -     ISSN:  1879-2472     ISO Abbreviation:  -     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-7-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0326377     Medline TA:  Thromb Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Elsevier Ltd. All rights reserved.
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