Transient receptor potential ankyrin 1 channels in the bladder mediate low temperature elicited bladder overactivity in rats.
LUTS
TRPA1 channel
low temperature
rat
urinary bladder
Journal
Neurourology and urodynamics
ISSN: 1520-6777
Titre abrégé: Neurourol Urodyn
Pays: United States
ID NLM: 8303326
Informations de publication
Date de publication:
27 Nov 2023
27 Nov 2023
Historique:
revised:
13
10
2023
received:
21
06
2023
accepted:
08
11
2023
medline:
27
11
2023
pubmed:
27
11
2023
entrez:
27
11
2023
Statut:
aheadofprint
Résumé
This study aimed to investigate whether pathways involving transient receptor potential ankyrin 1 (TRPA1) channels in the urinary bladder mediate the bladder overactivity elicited by exposure to a low temperature in rats. At postnatal week 10, female Sprague-Dawley (SD) rats were intraperitoneally injected with the TRPA1 channel antagonist, HC030031, at room temperature (RT) and subsequently exposed to low temperature (LT). Bladder specimens treated with HC030031 were evaluated for contractions through cumulative addition of the TRPA1 channel agonist trans-cinnamaldehyde. Two days before cystometric investigation, small interfering RNA (siRNA) targeting TRPA1 was transfected into urinary bladders. Then, cystometric investigations were performed on rats subjected to TRPA1 siRNA transfection at both RT and LT. Expression of TRPA1 channels in the urinary bladder was assessed through immunohistochemistry and real-time reverse transcription-polymerase chain reaction. At RT, micturition patterns were unaffected by HC030031 treatment. However, upon exposure to LT, rats treated with HC030031 exhibited a reduction of LT-elicited bladder overactivity, as evidenced by inhibited decreases in voiding interval, micturition volume, and bladder capacity. Additionally, HC030031 inhibited trans-cinnamaldehyde-induced contractions. Immunohistochemical analysis showed the presence of TRPA1 channels in the urinary bladder. Notably, rats with TRPA1 siRNA-transfected bladders could partially inhibit bladder overactivity during LT exposure. These findings indicate that pathways involving TRPA1 channels expressed in the urinary bladder could mediate the LT-elicited bladder overactivity.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Informations de copyright
© 2023 The Authors. Neurourology and Urodynamics published by Wiley Periodicals LLC.
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