PMID- 22975845 OWN - NLM STAT- MEDLINE DCOM- 20130715 LR - 20131121 IS - 1473-558X (Electronic) IS - 0959-4965 (Linking) VI - 23 IP - 16 DP - 2012 Nov 14 TI - Functional roles of endogenous D-serine in pain-induced ultrasonic vocalization. PG - 937-41 LID - 10.1097/WNR.0b013e3283595726 [doi] AB - The N-methyl-D-aspartate receptor (NMDAR) is crucial for pain-related behaviors. D-Serine is synthesized from L-serine by serine racemase (SR) and modulates NMDAR functions by acting as an agonist at the glycine-binding site. We analyzed noxious stimulus-induced ultrasonic vocalization and locomotor activity in the open-field test using SR knockout (SR-KO) mice to examine the role of endogenous D-serine in mammalian behaviors. SR-KO mice emitted less ultrasonic vocalization after noxious stimulation (VAS) than wild-type (WT) mice. The locomotor activity of WT mice decreased with repeated daily exposures to the open field, whereas that of SR-KO mice remained unchanged. VAS was significantly enhanced during arthritis in WT mice, whereas it was not enhanced during arthritis in SR-KO mice. These results indicate that mice lacking the ability to produce D-serine endogenously in the brain differ from normal mice with respect to the chronic pain-induced behavioral changes. FAU - Tsuzuki, Hitomi AU - Tsuzuki H AD - Department of Physiology and Biological Information, Dokkyo Medical University School of Medicine, Mibu, Japan. FAU - Maekawa, Masao AU - Maekawa M FAU - Konno, Ryuichi AU - Konno R FAU - Hori, Yuuichi AU - Hori Y LA - eng PT - Journal Article PL - England TA - Neuroreport JT - Neuroreport JID - 9100935 RN - 452VLY9402 (Serine) SB - IM MH - Animals MH - Male MH - Mice MH - Mice, Inbred C57BL MH - Mice, Knockout MH - Motor Activity/physiology MH - Pain/*metabolism/pathology MH - Serine/*physiology MH - *Ultrasonics/methods MH - Vocalization, Animal/*physiology EDAT- 2012/09/15 06:00 MHDA- 2013/07/17 06:00 CRDT- 2012/09/15 06:00 PHST- 2012/09/15 06:00 [entrez] PHST- 2012/09/15 06:00 [pubmed] PHST- 2013/07/17 06:00 [medline] AID - 10.1097/WNR.0b013e3283595726 [doi] PST - ppublish SO - Neuroreport. 2012 Nov 14;23(16):937-41. doi: 10.1097/WNR.0b013e3283595726.