title: [Roles of substance P and transient receptor potential vanilloid 1 in neuralgia in rats with chronic nonbacterial prostatitis].
abstract: OBJECTIVE
  To study the possible mechanisms of chronic nonbacterial prostatitis (CNP) pain.
  
  
  METHODS
  CNP models were established in male Wistar rats by the autoimmune method. Then the paw withdrawal threshold (PWT) was detected using the Von Frey filament, prostate pathological examination was conducted, the expressions of substance P (SP) and transient receptor potential vanilloid 1 (TRPV1) in the prostate tissue and L5-S2 spinal segments were determined by immunohistochemistry and their correlations were analyzed.
  
  
  RESULTS
  Compared with the control group, the CNP model rats showed markedly decreased PWT (P < 0.05) and obvious inflammation in the prostate tissue, with significant differences in the scope of lesion and interstitial lymphocyte infiltration (P < 0.05). The expressions of SP and TRPV1 in the prostate and spinal cord dorsal horn L5-S2 were remarkably upregulated in the models as compared with the control rats (P < 0.05). However, the expression of SP in the prostate was not correlated with that in the spinal cord (r = 0.099, P = 0.338), nor was that of TRPV1 (r = 0.000, P = 0.5).
  
  
  CONCLUSIONS
  SP and TRPV1 were involved in the formation and persistence of pain in CNP rats through their upregulated expressions in the L5-S2 spinal segments.
authors: Ying-jia
authors: YJ
authors: Liu
authors: Guo-hong
authors: GH
authors: Song
authors: Chen
authors: C
authors: Zhang
mesh_terms: D000818:Animals; D008161:Lumbosacral Region; D008297:Male; D009437:Neuralgia / Q000378:metabolism* / Q000503:physiopathology; D010146:Pain / Q000378:metabolism* / Q000503:physiopathology; D011467:Prostate / Q000378:metabolism; D011472:Prostatitis / Q000378:metabolism* / Q000503:physiopathology; D051381:Rats; D017208:Rats, Wistar; D013116:Spinal Cord / Q000378:metabolism*; D013373:Substance P / Q000378:metabolism*; D050916:TRPV Cation Channels / Q000378:metabolism*
chemical_list: D050916:TRPV Cation Channels; C494484:TRPV1 receptor; D013373:Substance P