PMID- 16941231 OWN - NLM STAT- MEDLINE DCOM- 20070329 LR - 20220716 IS - 0364-3190 (Print) IS - 0364-3190 (Linking) VI - 31 IP - 9 DP - 2006 Sep TI - Changes in amino acids and nitric oxide concentration in cerebrospinal fluid during labor pain. PG - 1127-33 AB - This study analyzes the relationship between amino acids and pain perception during active labor. Cerebrospinal fluid (CSF) levels of the excitatory amino acids (EAAs)-glutamate, aspartate and their amide forms, inhibitory amino acids (IAAs)-glycine, gamma-amino butyric acid (GABA) and taurine and nitric oxide (NO) related compounds-arginine and citrulline (by-product of NO synthesis) were compared between pregnant women at term pregnancy with labor pain (n = 38) and without labor pain (Caesarian section; n = 30). The levels of aspartate, glycine, GABA and citrulline were significantly higher; whilst taurine was significantly lower in the labor pain group. These findings suggest that aspartate and NO are associated with labor pain. An inhibitory role for the IAA taurine and a pronociceptive role for glycine in labor pain are proposed. FAU - Sethuraman, Rama AU - Sethuraman R AD - Department of Anaesthesia, National University of Singapore, 5 Lower Kent Ridge Road, Singapore, 119074, Singapore. anast@nus.edu.sg FAU - Lee, Tat-Leang AU - Lee TL FAU - Chui, Jen-Wun AU - Chui JW FAU - Tachibana, Shinro AU - Tachibana S LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20060829 PL - United States TA - Neurochem Res JT - Neurochemical research JID - 7613461 RN - 0 (Amino Acids) RN - 31C4KY9ESH (Nitric Oxide) SB - IM MH - Amino Acids/*cerebrospinal fluid MH - Female MH - Humans MH - Labor Pain/*cerebrospinal fluid MH - Nitric Oxide/*cerebrospinal fluid MH - Pregnancy EDAT- 2006/08/31 09:00 MHDA- 2007/03/30 09:00 CRDT- 2006/08/31 09:00 PHST- 2006/08/01 00:00 [accepted] PHST- 2006/08/31 09:00 [pubmed] PHST- 2007/03/30 09:00 [medline] PHST- 2006/08/31 09:00 [entrez] AID - 10.1007/s11064-006-9133-8 [doi] PST - ppublish SO - Neurochem Res. 2006 Sep;31(9):1127-33. doi: 10.1007/s11064-006-9133-8. Epub 2006 Aug 29.