Abstract:
BACKGROUND:The mechanisms underlying the loss of self-tolerance in systemic lupus erythematosus (SLE) are incompletely deciphered. TGF-β plays a key role in self-tolerance demonstrated by the onset of a fatal autoimmune syndrome associated with lupus autoantibodies in mice lacking a functional TGF-β receptor. The present work aims to define whether resistance to TGF-β might contribute to the pathogenesis of SLE. METHODS:Twenty-two patients with active SLE, 16 with other connective tissue diseases, and 10 healthy controls were prospectively included in this study. The effects of exogenous TGF-β1 on IL-2-dependent T-cell proliferation, IFN-γ secretion, and target gene transcription were analyzed on peripheral blood mononuclear cells. RESULTS:Our results showed that 75% of patients with SLE or other connective tissue diseases were totally or partially resistant to the effects of TGF-β1. The responses to the anti-proliferative and transcriptional effects of TGF-β were, however, discordant in a high proportion of our patients. Hence, we distinguish three distinct profiles of resistance to TGF-β1 and suggest that patients may exhibit different defects affecting distinct points of TGF-β1 signaling pathways. CONCLUSION:Our data demonstrate the presence of an impaired response of peripheral cells to TGF-β1 in patients with active SLE that may participate to the pathogenesis of the disease. Further studies will be necessary to delineate the mechanisms underlying the lymphocyte resistance to TGF-β1 in SLE.
journal_name
J Clin Immunoljournal_title
Journal of clinical immunologyauthors
Elbeldi-Ferchiou A,Ben Ahmed M,Smiti-Khanfir M,Houman MH,Abdeladhim M,Belhadj Hmida N,Cerf-Bensussan N,Louzir Hdoi
10.1007/s10875-011-9531-9subject
Has Abstractpub_date
2011-08-01 00:00:00pages
574-83issue
4eissn
0271-9142issn
1573-2592journal_volume
31pub_type
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journal_title:Journal of clinical immunology
pub_type: 杂志文章
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journal_title:Journal of clinical immunology
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journal_title:Journal of clinical immunology
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