| Literature DB >> 10377433 |
H Sato1, T Nakayama, Y Tanaka, M Yamashita, Y Shibata, E Kondo, Y Saito, M Taniguchi.
Abstract
Valpha14 NKT cells express an invariant antigen receptor encoded by Valpha14 and Jalpha281 gene segments as well as natural killer (NK) markers, including NK1.1. Here, we describe a precursor population of NKT cells (pre-NKT) that expresses NK1.1, T cell antigen receptor beta, pTalpha, and RAG1/2 but not Valpha14 and surface CD3epsilon. Such pre-NKT cells were differentiated successfully in vitro into mature CD3epsilon+ Valpha14(+) NKT cells by IL-15 and granulocyte/macrophage colony-stimulating factor (GM-CSF) in conjunction with stroma cells. Interestingly, only GM-CSF without stroma cells induced the Valpha14-Jalpha281 gene rearrangement in the pre-NKT cells. This also was confirmed by the findings that the number of mature Valpha14 NKT cells and the frequency of Valpha14-Jalpha281 rearrangements were decreased significantly in the mice lacking a GM-CSF receptor component, common beta-chain. These results suggest a crucial role of GM-CSF in the development of Valpha14 NKT cells in vivo.Entities:
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Year: 1999 PMID： 10377433 PMCID： PMC22104 DOI： 10.1073/pnas.96.13.7439
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN： 0027-8424 Impact factor: 11.205