Struvite urolithiasis and chronic urinary tract infection in a murine model of urinary diversion

Brian Becknell, Ashley R. Carpenter, Brad Bolon, John R. Asplin, Susan E. Ingraham, David Hains, Andrew L. Schwaderer, Kirk M. McHugh

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Objective: To characterize the clinical course after cutaneous vesicostomy (CV) in megabladder (mgb-/-) mice with functional urinary bladder obstruction. Materials and Methods: A total of 45 mgb-/- male mice underwent CV at a median age of 25 days. The 34 mice that survived >3 days after CV were evaluated by serial observation and renal ultrasonography. The moribund mice were killed. The urinary bladders and kidneys were analyzed by histopathologic analysis, and urine biochemical studies were performed. Results: At a median duration of 11 weeks after CV, 35% of mgb-/- male mice (12 of 34) had become moribund with pelvic masses, which were identified as bladder stones at necropsy. The urine pH was alkaline, and microscopic examination demonstrated struvite crystals. The urine samples contained Gram-positive cocci, and the urine cultures were polymicrobial. The stone composition was chiefly struvite (88%-94%) admixed with calcium phosphate. In 40% of cases (2 of 5), retained intravesical polypropylene suture was identified as the presumed nidus. No stones were detected in >100 male mice before CV or in 25 cases when CV was performed using polydioxanone suture. The kidneys from 33% of the mice (4/12) with bladder stones contained staghorn calculi. The histopathologic findings from the mice with struvite stones demonstrated active cystitis, pyelitis, and chronic pyelonephritis. Conclusion: These findings attest to the importance of the nidus in lithogenesis and provide a novel murine model for struvite urolithiasis and chronic infection of the diverted urinary tract.

Original languageEnglish (US)
Pages (from-to)943-948
Number of pages6
JournalUrology
Volume81
Issue number5
DOIs
StatePublished - May 1 2013

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Urinary Diversion
Urolithiasis
Cystostomy
Urinary Tract Infections
Skin
Urine
Urinary Bladder Calculi
Kidney
Sutures
Pyelitis
Urinary Bladder
Polydioxanone
Gram-Positive Cocci
Cystitis
Struvite
Polypropylenes
Pyelonephritis
Ultrasonography
Observation

All Science Journal Classification (ASJC) codes

  • Urology

Cite this

Becknell, B., Carpenter, A. R., Bolon, B., Asplin, J. R., Ingraham, S. E., Hains, D., ... McHugh, K. M. (2013). Struvite urolithiasis and chronic urinary tract infection in a murine model of urinary diversion. Urology, 81(5), 943-948. https://doi.org/10.1016/j.urology.2013.02.003

Struvite urolithiasis and chronic urinary tract infection in a murine model of urinary diversion. / Becknell, Brian; Carpenter, Ashley R.; Bolon, Brad; Asplin, John R.; Ingraham, Susan E.; Hains, David; Schwaderer, Andrew L.; McHugh, Kirk M.

In: Urology, Vol. 81, No. 5, 01.05.2013, p. 943-948.

Research output: Contribution to journalArticle

Becknell, B, Carpenter, AR, Bolon, B, Asplin, JR, Ingraham, SE, Hains, D, Schwaderer, AL & McHugh, KM 2013, 'Struvite urolithiasis and chronic urinary tract infection in a murine model of urinary diversion', Urology, vol. 81, no. 5, pp. 943-948. https://doi.org/10.1016/j.urology.2013.02.003
Becknell, Brian ; Carpenter, Ashley R. ; Bolon, Brad ; Asplin, John R. ; Ingraham, Susan E. ; Hains, David ; Schwaderer, Andrew L. ; McHugh, Kirk M. / Struvite urolithiasis and chronic urinary tract infection in a murine model of urinary diversion. In: Urology. 2013 ; Vol. 81, No. 5. pp. 943-948.
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abstract = "Objective: To characterize the clinical course after cutaneous vesicostomy (CV) in megabladder (mgb-/-) mice with functional urinary bladder obstruction. Materials and Methods: A total of 45 mgb-/- male mice underwent CV at a median age of 25 days. The 34 mice that survived >3 days after CV were evaluated by serial observation and renal ultrasonography. The moribund mice were killed. The urinary bladders and kidneys were analyzed by histopathologic analysis, and urine biochemical studies were performed. Results: At a median duration of 11 weeks after CV, 35{\%} of mgb-/- male mice (12 of 34) had become moribund with pelvic masses, which were identified as bladder stones at necropsy. The urine pH was alkaline, and microscopic examination demonstrated struvite crystals. The urine samples contained Gram-positive cocci, and the urine cultures were polymicrobial. The stone composition was chiefly struvite (88{\%}-94{\%}) admixed with calcium phosphate. In 40{\%} of cases (2 of 5), retained intravesical polypropylene suture was identified as the presumed nidus. No stones were detected in >100 male mice before CV or in 25 cases when CV was performed using polydioxanone suture. The kidneys from 33{\%} of the mice (4/12) with bladder stones contained staghorn calculi. The histopathologic findings from the mice with struvite stones demonstrated active cystitis, pyelitis, and chronic pyelonephritis. Conclusion: These findings attest to the importance of the nidus in lithogenesis and provide a novel murine model for struvite urolithiasis and chronic infection of the diverted urinary tract.",
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