| First Author | Takegahara N | Year | 2006 |
| Journal | Nat Cell Biol | Volume | 8 |
| Issue | 6 | Pages | 615-22 |
| PubMed ID | 16715077 | Mgi Jnum | J:110786 |
| Mgi Id | MGI:3641066 | Doi | 10.1038/ncb1416 |
| Citation | Takegahara N, et al. (2006) Plexin-A1 and its interaction with DAP12 in immune responses and bone homeostasis. Nat Cell Biol 8(6):615-22 |
| abstractText | Semaphorins and their receptors have diverse functions in axon guidance, organogenesis, vascularization and/or angiogenesis, oncogenesis and regulation of immune responses. The primary receptors for semaphorins are members of the plexin family. In particular, plexin-A1, together with ligand-binding neuropilins, transduces repulsive axon guidance signals for soluble class III semaphorins, whereas plexin-A1 has multiple functions in chick cardiogenesis as a receptor for the transmembrane semaphorin, Sema6D, independent of neuropilins. Additionally, plexin-A1 has been implicated in dendritic cell function in the immune system. However, the role of plexin-A1 in vivo, and the mechanisms underlying its pleiotropic functions, remain unclear. Here, we generated plexin-A1-deficient (plexin-A1(-/-)) mice and identified its important roles, not only in immune responses, but also in bone homeostasis. Furthermore, we show that plexin-A1 associates with the triggering receptor expressed on myeloid cells-2 (Trem-2), linking semaphorin-signalling to the immuno-receptor tyrosine-based activation motif (ITAM)-bearing adaptor protein, DAP12. These findings reveal an unexpected role for plexin-A1 and present a novel signalling mechanism for exerting the pleiotropic functions of semaphorins. |
