Abstract:
:Hematopoiesis is a complex process tightly controlled by sets of transcription factors in a context-dependent and stage-specific manner. Smad2/3 transcription factor plays a central role in differentiation and survival of erythroid cells. Here we report that follistatin-like 1 (FSTL1) treatment impairs hemin-induced erythroid differentiation and cell survival. FSTL1 differentially regulates transforming growth factor beta (TGF-β) and bone morphogenetic protein (BMP) signaling. Blockade of Smad2/3 signaling with the ALK5/type I TGF-βR kinase inhibitor, SB-525334, was efficacious for rescue of erythroid differentiation blockage and apoptosis. Reversely, activation of Smad1/5/8 signaling with BMP4 cannot rescue FSTL1-mediated erythroid differentiation blockage and apoptosis. Collectively, these data provide mechanistic insight into the regulation of erythropoiesis by FSTL1 signaling and lay a foundation for exploring FSTL1 signaling as a therapeutic target for anemia.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Wu J,Dong Y,Teng X,Cheng M,Shen Z,Chen Wdoi
10.1016/j.bbrc.2015.09.044subject
Has Abstractpub_date
2015-10-30 00:00:00pages
711-6issue
4eissn
0006-291Xissn
1090-2104pii
S0006-291X(15)30561-1journal_volume
466pub_type
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