PMID- 17322105 OWN - NLM STAT- MEDLINE DCOM- 20070516 LR - 20091119 IS - 1066-5099 (Print) IS - 1066-5099 (Linking) VI - 25 IP - 5 DP - 2007 May TI - Analyses of very early hemopoietic regeneration after bone marrow transplantation: comparison of intravenous and intrabone marrow routes. PG - 1186-94 AB - In bone marrow transplantation (BMT), bone marrow cells (BMCs) have traditionally been injected intravenously. However, remarkable advantages of BMT via the intra-bone-marrow (IBM) route (IBM-BMT) over the intravenous route (IV-BMT) have been recently documented by several laboratories. To clarify the mechanisms underlying these advantages, we analyzed the kinetics of hemopoietic regeneration after IBM-BMT or IV-BMT in normal strains of mice. At the site of the direct injection of BMCs, significantly higher numbers of donor-derived cells in total and of c-kit(+) cells were observed at 2 through 6 days after IBM-BMT. In parallel, significantly higher numbers of colony-forming units in spleen were obtained from the site of BMC injection. During this early period, higher accumulations of both hemopoietic cells and stromal cells were observed at the site of BMC injection by the IBM-BMT route. The production of chemotactic factors, which can promote the migration of a BM stromal cell line, was observed in BMCs obtained from irradiated mice as early as 4 hours after irradiation, and the production lasted for at least 4 days. In contrast, sera collected from the irradiated mice showed no chemotactic activity, indicating that donor BM stromal cells that entered systemic circulation cannot home effectively into recipient bone cavity. These results strongly suggest that the concomitant regeneration of microenvironmental and hemopoietic compartments in the marrow (direct interaction between them at the site of injection) contributes to the advantages of IBM-BMT over IV-BMT. Disclosure of potential conflicts of interest is found at the end of this article. FAU - Li, Qing AU - Li Q AD - First Department of Pathology, Kansai Medical University, 10-15 Fumizono-cho, Moriguchi City, Osaka 570-8506, Japan. FAU - Hisha, Hiroko AU - Hisha H FAU - Yasumizu, Ryoji AU - Yasumizu R FAU - Fan, Tian-Xue AU - Fan TX FAU - Yang, Guo-Xiang AU - Yang GX FAU - Li, Qiang AU - Li Q FAU - Cui, Yun-Ze AU - Cui YZ FAU - Wang, Xiao-Li AU - Wang XL FAU - Song, Chang-Ye AU - Song CY FAU - Okazaki, Satoshi AU - Okazaki S FAU - Mizokami, Tomomi AU - Mizokami T FAU - Cui, Wen-Hao AU - Cui WH FAU - Guo, Kequan AU - Guo K FAU - Li, Ming AU - Li M FAU - Feng, Wei AU - Feng W FAU - Katou, Junko AU - Katou J FAU - Ikehara, Susumu AU - Ikehara S LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20070222 PL - England TA - Stem Cells JT - Stem cells (Dayton, Ohio) JID - 9304532 RN - 0 (Antigens, CD34) RN - EC 2.7.10.1 (Proto-Oncogene Proteins c-kit) SB - IM MH - Animals MH - Antigens, CD34/metabolism MH - *Bone Marrow Transplantation MH - Cell Movement MH - Colony-Forming Units Assay MH - Drug Administration Routes MH - Female MH - Granulocytes/cytology MH - Hematopoiesis/*physiology MH - Kinetics MH - Lymphocytes/cytology MH - Mice MH - Mice, Inbred BALB C MH - Proto-Oncogene Proteins c-kit/metabolism MH - *Regeneration MH - Stromal Cells/cytology EDAT- 2007/02/27 09:00 MHDA- 2007/05/17 09:00 CRDT- 2007/02/27 09:00 PHST- 2007/02/27 09:00 [pubmed] PHST- 2007/05/17 09:00 [medline] PHST- 2007/02/27 09:00 [entrez] AID - 2006-0354 [pii] AID - 10.1634/stemcells.2006-0354 [doi] PST - ppublish SO - Stem Cells. 2007 May;25(5):1186-94. doi: 10.1634/stemcells.2006-0354. Epub 2007 Feb 22.