PMID- 9402659 OWN - NLM STAT- MEDLINE DCOM- 19980217 LR - 20071114 IS - 1066-5099 (Print) IS - 1066-5099 (Linking) VI - 15 IP - 6 DP - 1997 TI - Requirement of major histocompatibility complex-compatible microenvironment for spleen colony formation (CFU-S on day 12 but not on day 8). PG - 461-8 AB - To clarify major histocompatibility complex (MHC) restriction between hematopoietic stem cells (HSCs) and microenvironments, T cell-depleted bone marrow cells (BMCs) were transplanted into MHC-compatible and MHC-incompatible recipients. A significantly larger number of spleen colony-forming units (CFU-S) on day 12 were noted in MHC-compatible recipients, while only a small number were observed in MHC-incompatible recipients. There was, however, no significant difference in CFU-S counts on day 8 between the two groups. A large number of CFU-S counts on day 12 were also observed in F1 hybrid recipients, as seen in syngeneic recipients. The decrease in CFU-S counts on day 12 in MHC-incompatible recipients was also observed even after in vivo abrogation of T and NK cells. The difference in CFU-S counts on day 12 became more prominent when HSC-enriched cells were transferred. These results suggest that an MHC restriction exists between pluripotent HSCs (P-HSCs) and spleen microenvironments. Furthermore, experiments using B10. A recombinant strains revealed that H-2D and S loci play a crucial role in the MHC restriction. The experiments of serial transplantation suggest that the differentiation and proliferation of P-HSCs are inhibited in MHC-incompatible microenvironments. It is therefore likely that the MHC-compatible microenvironment is essential to the differentiation and proliferation of P-HSCs. FAU - Sugiura, K AU - Sugiura K AD - First Department of Pathology, Kansai Medical University, Osaka, Japan. FAU - Inaba, M AU - Inaba M FAU - Hisha, H AU - Hisha H FAU - Borisov, K AU - Borisov K FAU - Sardina, E E AU - Sardina EE FAU - Good, R A AU - Good RA FAU - Ikehara, S AU - Ikehara S LA - eng GR - AGO5627/AG/NIA NIH HHS/United States GR - AI22360/AI/NIAID NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - England TA - Stem Cells JT - Stem cells (Dayton, Ohio) JID - 9304532 SB - IM MH - Animals MH - Colony-Forming Units Assay MH - *Hematopoiesis MH - Hematopoietic Stem Cell Transplantation MH - Hematopoietic Stem Cells/*cytology MH - Histocompatibility Testing MH - *Major Histocompatibility Complex MH - Mice MH - Mice, Inbred C3H MH - Mice, Inbred C57BL MH - Spleen/*cytology MH - Stromal Cells/cytology MH - Time Factors EDAT- 1997/01/01 00:00 MHDA- 1997/12/24 00:01 CRDT- 1997/01/01 00:00 PHST- 1997/01/01 00:00 [pubmed] PHST- 1997/12/24 00:01 [medline] PHST- 1997/01/01 00:00 [entrez] AID - 10.1002/stem.150461 [doi] PST - ppublish SO - Stem Cells. 1997;15(6):461-8. doi: 10.1002/stem.150461.