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  • Title: Culture of bladder epithelium from cystoscopic biopsies of patients with interstitial cystitis.
    Author: Trifillis AL, Cui X, Jacobs S, Warren JW.
    Journal: J Urol; 1995 Jan; 153(1):243-8. PubMed ID: 7966781.
    Abstract:
    Interstitial cystitis is a chronic disease of unknown etiology characterized by bladder pain and urinary frequency and urgency. The epithelium may be critical in its pathogenesis; the hallmarks of the disease are visible epithelial defects (Hunner's ulcers and epithelial ruptures). Areas denuded of epithelium are commonly seen, and defects in epithelial permeability are characteristic. We report here the culture and characterization of epithelial cells from cystoscopic bladder biopsies obtained from 7 female patients with interstitial cystitis. Within 4 to 14 days cellular outgrowths appeared from explants incubated in cell medium. Monolayers reached confluence after 6 weeks. Cells of the monolayer were cytokeratin-positive and smooth muscle actin-negative, confirming their epithelial origin. They exhibited epithelial cell ultrastructure including intermediate filaments and junctional complexes. Vesicles bounded by a trilaminar plasma membrane and lateral interdigitations were also present. This is the first report of the culture of bladder epithelium from interstitial cystitis patients. Epithelial cells may be targets for initiating agents and inflammatory effects of interstitial cystitis and should be useful for studies of the pathogenesis of this disease.
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