Abstract:
:Bone morphogenetic proteins (BMP) are multifunctional cytokines that belong to the TGF-beta superfamily. BMP have been shown to regulate haematopoietic stem cells, B lymphopoiesis and early thymocyte differentiation. In the present study we explored the role of BMP-6 in Jurkat TAg cells. BMP-6 rapidly induced phosphorylation of Smad1/5/8, p38 and ERK1/2, followed by a potent up-regulation of ID1, ID2 and ID3. ID1 and ID3 were also induced at the protein level. Genome-wide expression profiling of cells treated with BMP-6 compared to medium confirmed that ID1-ID3 were target genes of BMP-6 together with Noggin and Smad6. Furthermore, several genes involved in transcriptional regulation were also identified, including NFKBIA, HEY1, DLX2, KLF10 and early growth response 1. Stimulation with BMP-6 exerted an antiproliferative effect that was counteracted by inhibitor of DNA binding (Id)1 siRNA, indicating that Id1 is an important downstream mediator in Jurkat TAg cells. A subset of CD4(+) T cells were found to express the BMP receptors Alk-2 and Alk-3 (type I), in addition to BMPRII (type II). BMP-6 also induced phosphorylation of Smad1/5/8, followed by transcriptional increase in ID1-ID3 mRNA expression. However, we did not observe significant changes in Id protein expression in CD4(+) T cells. Altogether, the data indicate a role for BMP-6 in human T lineage cells.
journal_name
Eur J Immunoljournal_title
European journal of immunologyauthors
Sivertsen EA,Huse K,Hystad ME,Kersten C,Smeland EB,Myklebust JHdoi
10.1002/eji.200636759subject
Has Abstractpub_date
2007-10-01 00:00:00pages
2937-48issue
10eissn
0014-2980issn
1521-4141journal_volume
37pub_type
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