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- W18993002 abstract "Immunopathological Characteristics of Cryptoglandular and Crohn's Anorectal Fistulas Anorectal fistulas are quite common proctologic disorders. They can be either of cryptoglandular origin or can be associated with Crohn's disease and chronic ileocolitis. Mechanical obstruction and local infections are prime causes of this pathological condition. Genetic predisposition and inadequate immune response with overproduction of pro-inflammatory cytokines appear prominently in the course of Crohn's disease. Interferon-γ, a Th1 type cytokine, reflecting the engagement of cellular immune mechanisms, is the first to be produced in the intestinal mucosa. The inflammatory process in the colon mucosa induced by the abundant microbial flora is sustained and turned chronic by the gradual elevation of the local TNF-α and regulatory cytokines levels (interleukin-10, transforming growth factor-β). The number of activated local memory T cells CD4+CD45RB lo increases significantly. The regulatory CD4+CD25+ T lymphocytes producing interleukin-10 increase also trying to counterbalance the cytokine reaction. The chronic inflammatory infiltrates of the colon mucosa are represented by lymphocytes, plasma cells, macrophages. The long-term activation of macrophages by the released interferon-γ leads to tissue damage and potentiation of angiogenesis - a risk factor for carcinoma development. Management of anorectal abscesses and fistulas is complex aiming to alleviate the symptoms, prevent relapses, reduce the risk of sphincter damage and improve quality of life. The main approach (surgery) should be combined with antimicrobial infection control and immunomodulation by intravenous or local administration of anti-TNF-α antibodies." @default.
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- W18993002 date "2010-10-01" @default.
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- W18993002 title "Immunopathological Characteristics of Cryptoglandular and Crohn's Anorectal Fistulas" @default.
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- W18993002 doi "https://doi.org/10.2478/v10153-010-011-4" @default.
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