title: [Expressions of transient receptor potential A1 and related inflammatory factors in the rat model of prostatic inflammation].
abstract: OBJECTIVE
  To explore the molecular mechanism of pain associated with chronic prostatitis and chronic pelvic pain syndrome (CP/CPPS) in the rat model of prostatic inflammation.
  
  
  METHODS
  Thirty-six male SD rats were equally randomized to an experimental and a control group, the former injected with 50 μl of 3% λ-carrageenan into the ventral prostate to make the model of non-bacterial prostatic inflammation, while the latter with the same volume of sterile saline solution. At 1, 2 and 4 weeks after modeling, the prostate, L6-S1 dorsal root ganglion (DRG) and spinal cord were harvested for examination of the expressions of the nerve growth factor (NGF), transient receptor potential ankyrin 1 (TRPA1), and calcitonin-gene-related peptide (CGRP) by immunohistochemistry and Western blot.
  
  
  RESULTS
  The expressions of NGF, TRPA1 and CGRP in the prostatic tissue were all significantly increased in the experimental group as compared with the control (P <0.05), with a gradual decrease with the prolonging of time (P <0.05). In the L6-S1 DRG and spinal cord, the expressions of NGF, TRPA1 and CGRP exhibited no significant differences between the experimental and control groups at 1 week after modeling (P >0.05) and kept at high levels in the experimental group at 2 and 4 weeks, though not significantly different from those at 1 week (P >0.05). Statistically significant differences were observed in the expressions of the three proteins in the experimental rats among different time points (P <0.05), but not between the two groups at any time point (P >0.05).
  
  
  CONCLUSIONS
  The molecular mechanism of CP/CPPS can be evaluated in the rat model of prostatic inflammation established by injecting λ-carrageenan into the prostate. TRPA1 may play an important role in connecting the upstream and down-stream pathways of CP/CPPS-associated pain.
authors.forename: Bao-xing
authors.initials: BX
authors.lastname: Huang
authors.forename: Wan-li
authors.initials: WL
authors.lastname: Cao
authors.forename: Xin
authors.initials: X
authors.lastname: Huang
authors.forename: Jun
authors.initials: J
authors.lastname: Dai
authors.forename: Heng-chuan
authors.initials: HC
authors.lastname: Su
authors.forename: Kang
authors.initials: K
authors.lastname: Cheng
authors.forename: Fu-kang
authors.initials: FK
authors.lastname: Sun
mesh_terms: D000818:Animals; D015740:Calcitonin Gene-Related Peptide / Q000378:metabolism; D002351:Carrageenan; D002908:Chronic Disease; D059350:Chronic Pain / Q000378:metabolism*; D005727:Ganglia, Spinal / Q000378:metabolism; D006801:Humans; D008297:Male; D020932:Nerve Growth Factor / Q000378:metabolism; D017699:Pelvic Pain / Q000378:metabolism*; D011472:Prostatitis / Q000139:chemically induced / Q000378:metabolism*; D051381:Rats; D017207:Rats, Sprague-Dawley; D013116:Spinal Cord / Q000378:metabolism; D000074025:TRPA1 Cation Channel; D050052:TRPC Cation Channels / Q000378:metabolism*
chemical_list: D000074025:TRPA1 Cation Channel; D050052:TRPC Cation Channels; C480976:Trpa1 protein, rat; D002351:Carrageenan; D020932:Nerve Growth Factor; D015740:Calcitonin Gene-Related Peptide