PMID- 22641131 OWN - NLM STAT- MEDLINE DCOM- 20121120 LR - 20190911 IS - 1347-8648 (Electronic) IS - 1347-8613 (Linking) VI - 119 IP - 1 DP - 2012 TI - Possible modulation of process extension by N-methyl-D-aspartate receptor expressed in osteocytic MLO-Y4 cells. PG - 112-6 AB - In contrast to osteoblasts, little attention has been paid to expression profiles of different glutamatergic signaling machineries in osteocytes, which are the most abundant cells with a possible role as a mechanical sensor in bone. Here, we show that N-methyl-D-aspartate receptor (NMDAR) is expressed by osteocytic cells in five-weeks-old mouse tibiae in vivo as well as by osteocytic MLO-Y4 cells in vitro. Sustained exposure to the NMDAR antagonist dizocilpine significantly increased the number of cells with processes in cultured MLO-Y4 cells. These results suggest that NMDAR would be expressed by osteocytes with an unidentified role in the process extension. FAU - Fujita, Hiroyuki AU - Fujita H AD - Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences, Kanazawa University Graduate School of Natural Science and Technology, Kakuma-machi, Ishikawa, Japan. FAU - Hinoi, Eiichi AU - Hinoi E FAU - Nakatani, Eri AU - Nakatani E FAU - Yamamoto, Tomomi AU - Yamamoto T FAU - Takarada, Takeshi AU - Takarada T FAU - Yoneda, Yukio AU - Yoneda Y LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20120428 PL - Japan TA - J Pharmacol Sci JT - Journal of pharmacological sciences JID - 101167001 RN - 0 (Receptors, N-Methyl-D-Aspartate) RN - 3KX376GY7L (Glutamic Acid) SB - IM MH - Animals MH - Bone and Bones/metabolism MH - Cells, Cultured MH - Glutamic Acid/metabolism MH - Male MH - Mice MH - Mice, Inbred C57BL MH - Osteocytes/*metabolism MH - Receptors, N-Methyl-D-Aspartate/*metabolism EDAT- 2012/05/30 06:00 MHDA- 2012/12/10 06:00 CRDT- 2012/05/30 06:00 PHST- 2012/05/30 06:00 [entrez] PHST- 2012/05/30 06:00 [pubmed] PHST- 2012/12/10 06:00 [medline] AID - JST.JSTAGE/jphs/12068SC [pii] AID - 10.1254/jphs.12068sc [doi] PST - ppublish SO - J Pharmacol Sci. 2012;119(1):112-6. doi: 10.1254/jphs.12068sc. Epub 2012 Apr 28.