PMID- 21629176 OWN - NLM STAT- MEDLINE DCOM- 20110929 LR - 20171116 IS - 1534-6080 (Electronic) IS - 0041-1337 (Linking) VI - 92 IP - 2 DP - 2011 Jul 27 TI - Adenosine diphosphate receptor P2Y12-mediated migration of host smooth muscle-like cells and leukocytes in the development of transplant arteriosclerosis. PG - 148-54 LID - 10.1097/TP.0b013e318221d407 [doi] AB - BACKGROUND: We have recently reported that platelet P2Y12 receptors may play a role in the development of transplant arteriosclerosis (TA). In the present study, we investigated the role of P2Y12 receptors on host-derived smooth muscle-like cells (SMLCs, including bone-marrow-derived SMLCs) and CD45+ leukocytes, both of which are believed to be associated with the development of TA, using P2Y12-deficient (KO) mice. METHODS: Orthotopic carotid artery transplantation was performed from C3H/He (H-2k) donors into KO or wild-type (WT) recipient mice (129S:C57BL/6, H-2b). Grafts were harvested at 8 weeks after transplantation for histology. Plasma monocyte chemoattractant protein-1 (MCP-1) levels were analyzed with a kit. Cell migration was examined using a Boyden chamber system. The expression of MCP-1 messenger RNA was assessed by real-time polymerase chain reaction. RESULTS: Eight weeks after allotransplantation, KO recipient mice showed a significant reduction of luminal occlusion, host-derived SMLCs, CD45+ leukocytes, MCP-1+ cells in the grafts, and of plasma MCP-1 levels. In addition, the migration of host-derived SMLCs (including bone-marrow-derived SMLCs) and CD45+ leukocytes stimulated with adenosine diphosphate (ADP) or 2-methylthio-ADP (2MeSADP, a stable ADP analog) was significantly decreased in KO mice. There were no significant changes in MCP-1-induced cell migration between WT and KO mice. The low concentration of 2MeSADP plus MCP-1 significantly increased cell migration in WT but not KO mice. Furthermore, 2MeSADP-induced MCP-1 messenger RNA expression was significantly reduced in the cells of KO mice. CONCLUSIONS: Thus, the P2Y12-mediated migration of host-derived SMLCs and CD45+ leukocytes may play an important role in the development of TA, partly by MCP-1 pathways. FAU - Harada, Kosuke AU - Harada K AD - Department of Pharmacology, Hamamatsu University School of Medicine, Hamamatsu City, Shizuoka, Japan. FAU - Matsumoto, Yuji AU - Matsumoto Y FAU - Umemura, Kazuo AU - Umemura K LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Transplantation JT - Transplantation JID - 0132144 RN - 0 (Ccl2 protein, mouse) RN - 0 (Chemokine CCL2) RN - 0 (P2ry12 protein, mouse) RN - 0 (Receptors, Purinergic P2Y12) RN - 0 (Thionucleotides) RN - 34983-48-7 (methylthio-ADP) RN - 61D2G4IYVH (Adenosine Diphosphate) RN - EC 3.1.3.48 (Leukocyte Common Antigens) RN - EC 3.1.3.48 (Ptprc protein, mouse) SB - IM MH - Adenosine Diphosphate/analogs & derivatives/pharmacology MH - Animals MH - Arteriosclerosis/pathology/*physiopathology MH - Bone Marrow/pathology MH - Carotid Arteries/pathology/physiopathology/*transplantation MH - Cell Movement/*physiology MH - Chemokine CCL2/metabolism MH - Leukocyte Common Antigens/metabolism MH - Leukocytes/drug effects/*pathology/physiology MH - Mice MH - Mice, Inbred C3H MH - Mice, Inbred C57BL MH - Mice, Knockout MH - Models, Animal MH - Muscle, Smooth, Vascular/drug effects/*pathology/physiopathology MH - Receptors, Purinergic P2Y12/deficiency/genetics/*physiology MH - Signal Transduction/physiology MH - Thionucleotides/pharmacology EDAT- 2011/06/02 06:00 MHDA- 2011/10/01 06:00 CRDT- 2011/06/02 06:00 PHST- 2011/06/02 06:00 [entrez] PHST- 2011/06/02 06:00 [pubmed] PHST- 2011/10/01 06:00 [medline] AID - 10.1097/TP.0b013e318221d407 [doi] PST - ppublish SO - Transplantation. 2011 Jul 27;92(2):148-54. doi: 10.1097/TP.0b013e318221d407.