PMID- 12575918 OWN - NLM STAT- Publisher LR - 20191120 IS - 2058-7384 (Electronic) IS - 0394-6320 (Linking) VI - 15 IP - 3 DP - 2002 Sep-Dec TI - Effect of monocyte chemoattractant protein-1 on murine bone marrow cells: proliferation, colony-forming ability and signal transduction pathway involved. PG - 183-194 AB - Monocyte chemoattractant protein-1 (MCP-1) plays a crucial role in the migration and activation of leukocytes in both physiological and pathological contexts. In this paper, we report the in vitro effect of MCP-1 on myeloid haematopoiesis. MCP-1-treated murine nonadherent bone marrow cells (NABMCs) were assayed for in vitro proliferation and colony forming ability. It is observed that MCP-1 treatment in vitro caused an enhancement in the proliferation and colony forming ability of the murine NABMCs as compared to the untreated cells. This response was concentration-dependent and most effective at a dose of 100ng/ml MCP-1. In the presence of MCSF (200U/ml), GCSF (200U/ml), GMCSF (200U/ml) or IL-3 (200U/ml), the MCP-1-induced colony forming ability of the NABMCs was significantly augmented, indicating a synergistic effect of MCP-1 with these CSFs. However, irrespective of the CSFs used, MCP-1 stimulated the lineage-restricted differentiation of the murine BMCs into predominantly the granulocytic lineage. NABMCs cultured in medium alone formed minimal colonies. The probable signal transduction mechanism responsible for the MCP-1-induced NABMC proliferation/differentiation was also investigated. The results of the colony forming assay indicate that the protein kinase inhibitors, genistein (10&mgr;g/ml), chelenthryin chloride (10&mgr;M), wortmannin (200nM) and PD98059 (10&mgr;M) significantly blocked the in vitro colony forming ability of the MCP-1-treated NABMCs, while the phosphatase inhibitors, okadaic acid (10nM) and sodium orthovanadate (10&mgr;M) caused an increase in the BMC colony forming ability in response to MCP-1. These data suggests the involvement of the respective protein kinases and phosphatases in the above process. Correlating with this, the role of several signaling molecules likes Lyn, p42/44MAPK, PI3K and STAT5 has also been implicated in the signal cascade of murine NABMC proliferation/differentiation following MCP-1 treatment. FAU - Biswas, S K AU - Biswas SK AD - School of Biotechnology, Banaras Hindu University, Varanasi, India. FAU - Sodhi, A AU - Sodhi A LA - eng PT - Journal Article PL - England TA - Int J Immunopathol Pharmacol JT - International journal of immunopathology and pharmacology JID - 8911335 EDAT- 2003/02/11 04:00 MHDA- 2003/02/11 04:00 CRDT- 2003/02/11 04:00 PHST- 2003/02/11 04:00 [pubmed] PHST- 2003/02/11 04:00 [medline] PHST- 2003/02/11 04:00 [entrez] AID - 4 [pii] AID - 10.1177/039463200201500304 [doi] PST - ppublish SO - Int J Immunopathol Pharmacol. 2002 Sep-Dec;15(3):183-194. doi: 10.1177/039463200201500304.