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- W3030436413 abstract "ObjectiveTo investigate the role of 2B subunits-containing N-methyl-D-aspartate receptors (NR2B) in the arcuate nucleus in the development of inflammatory pain (IP) in rats.MethodsOne hundred and eight male Sprague-Dawley rats, aged 9 weeks, weighing 200-250 g, were randomly divided into 4 groups using a random number table: sham operation group (group S, n=47); group IP (n=47); dimethyl sulfoxide control group (group DMSO, n=7); selective NR2B antagonist Ro25-6981 group (group Ro25-6981, n=7). IP was induced by injecting complete Freund's adjuvant (CFA) 0.1 ml into the plantar surface of the left hindpaw.Ro25-6981 400 pmol was injected into the arcuate nucleus at 3 days after CFA injection.Seven rats in each group were selected for measurement of the mechanical paw withdrawal threshold (MWT) and thermal paw withdrawal latency (TWL) at 1 day before CFA injection (T1) and at 2 days after CFA injection (T2), at 30 min before administration on 3rd day (T3), at 30 min after administration on 3rd day (T4), and on 5th day (T5). In S and IP groups, The rats were sacrificed at T1-3 and T5, and the arcuate nucleus of the hypothalamus was removed for determination of NR2B mRNA expression (by real-time reverse transcriptase polymerase chain reaction) and NR2B and phosphorylated NR2B (p-NR2B) expression (by Western blot).ConclusionCompared with group S, the MWT was significantly decreased, and the TWL was shortened at T2-5 in IP, DMSO and Ro25-6981 groups, and the expression of p-NR2B was up-regulated at each time point (P 0.05). Compared with group IP, the MWT was significantly increased, and the TWL was prolonged at T4 in group Ro25-6981 (P 0.05).ConclusionThe activation of NR2B in the arcuate nucleus is involved in the development of IP in rats.Key words: Inflammation; Pain; Arcuate nucleus; Receptors, N-methyl-D-aspartate" @default.
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- W3030436413 date "2015-09-20" @default.
- W3030436413 modified "2023-09-28" @default.
- W3030436413 title "Role of 2B subunits-containing NMDA receptors in arcuate nucleus in development of inflammatory pain in rats" @default.
- W3030436413 doi "https://doi.org/10.3760/cma.j.issn.0254-1416.2015.09.012" @default.
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