Suppressor of cytokine signaling 1 regulates embryonic myelopoiesis independently of its effects on T cell development
- Authors
- O'Sullivan, L.A., Noor, S.M., Trengove, M.C., Lewis, R.S., Liongue, C., Sprigg, N.S., Nicholson, S.E., and Ward, A.C.
- ID
- ZDB-PUB-110425-8
- Date
- 2011
- Source
- Journal of immunology (Baltimore, Md. : 1950) 186(8): 2751-2761 (Journal)
- Registered Authors
- Liongue, Clifford, Trengove, Monique, Ward, Alister C.
- Keywords
- none
- MeSH Terms
-
- Sequence Analysis, DNA
- Gene Knockout Techniques
- Amino Acid Sequence
- Animals
- Humans
- HEK293 Cells
- Binding Sites/genetics
- Zebrafish Proteins/classification
- Zebrafish Proteins/genetics*
- Zebrafish Proteins/metabolism
- Sequence Homology, Amino Acid
- Cloning, Molecular
- Zebrafish/embryology
- Zebrafish/genetics*
- Molecular Sequence Data
- Protein Binding
- Reverse Transcriptase Polymerase Chain Reaction
- Suppressor of Cytokine Signaling Proteins/classification
- Suppressor of Cytokine Signaling Proteins/genetics*
- Suppressor of Cytokine Signaling Proteins/metabolism
- Phylogeny
- STAT5 Transcription Factor/metabolism
- Signal Transduction
- Base Sequence
- In Situ Hybridization
- T-Lymphocytes/metabolism*
- Protein-Tyrosine Kinases/metabolism
- Embryo, Nonmammalian/blood supply
- Embryo, Nonmammalian/embryology
- Embryo, Nonmammalian/metabolism
- Myelopoiesis*
- Promoter Regions, Genetic/genetics
- Gene Expression Regulation, Developmental
- PubMed
- 21421851 Full text @ J. Immunol.
Suppressor of cytokine signaling 1 (SOCS1) has been shown to play important roles in the immune system. It acts as a key negative regulator of signaling via receptors for IFNs and other cytokines controlling T cell development, as well as Toll receptor signaling in macrophages and other immune cells. To gain further insight into SOCS1, we have identified and characterized the zebrafish socs1 gene, which exhibited sequence and functional conservation with its mammalian counterparts. Initially maternally derived, the socs1 gene showed early zygotic expression in mesodermal structures, including the posterior intermediate cell mass, a site of primitive hematopoiesis. At later time points, expression was seen in a broad anterior domain, liver, notochord, and intersegmental vesicles. Morpholino-mediated knockdown of socs1 resulted in perturbation of specific hematopoietic populations prior to the commencement of lymphopoiesis, ruling out T cell involvement. However, socs1 knockdown also lead to a reduction in the size of the developing thymus later in embryogenesis. Zebrafish SOCS1 was shown to be able to interact with both zebrafish Jak2a and Stat5.1 in vitro and in vivo. These studies demonstrate a conserved role for SOCS1 in T cell development and suggest a novel T cell-independent function in embryonic myelopoiesis mediated, at least in part, via its effects on receptors using the Jak2-Stat5 pathway.