Bjorling DE, Wang ZY, Boldon K, Bushman W. Bacterial cystitis is accompanied by increased peripheral thermal sensitivity in mice.
J Urol 2007;
179:759-63. [PMID:
18082197 DOI:
10.1016/j.juro.2007.09.024]
[Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2007] [Indexed: 12/19/2022]
Abstract
PURPOSE
Visceral inflammation and pain associated with chemical cystitis produce increased sensitivity to noxious stimuli in the sacral dermatomes. We determined whether a similar sensitization occurs in response to bacterial cystitis.
MATERIALS AND METHODS
Bacterial cystitis was induced by intravesical instillation of Escherichia coli 1677 in female C57BL/6N and C3H/OuJ mice (Jackson Laboratories, Bar Harbor, Maine). C3H/HeJ mice (Jackson Laboratories) served as a control because C3H/HeJ mice lack functional toll-like receptor 4, which is an essential component of cellular recognition of bacterial lipopolysaccharide. Hind paw sensitivity to thermal stimulus was quantitatively determined 1, 2, 7 and 14 days after infection.
RESULTS
Intravesical instillation of E. coli produced infection in all strains of mice. Infection persisted in all C3H/OuJ and C3H/HeJ mice but it spontaneously cleared in some C57BL/6N mice. Increased sensitivity to thermal stimuli was observed in C57BL/6N and C3H/OuJ mice starting 1 to 2 days after E. coli instillation and it was still present 14 days after instillation. Increased sensitivity to thermal stimuli did not occur in C3H/HeJ mice.
CONCLUSIONS
E. coli induced cystitis produced increased sensitivity to peripheral thermal stimuli in mice with competent toll-like receptor 4.
Collapse