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Severe familial cholestasis in North American Indian children: a clinical model of microfilament dysfunction?

A M Weber, B Tuchweber, I Yousef

    Gastroenterology
    |October 1, 1981
    PubMed

    Insights

    Familial neonatal cholestasis in 14 children showed progressive liver damage and portal hypertension. This suggests a potential human model for microfilament dysfunction causing cholestasis.

    Area of Science:

    • Pediatric Hepatology
    • Gastroenterology
    • Cell Biology

    Background:

    • Severe neonatal cholestasis can lead to progressive liver damage.
    • Familial cholestasis presents unique challenges in diagnosis and management.
    • Understanding the cellular mechanisms is crucial for developing targeted therapies.

    Purpose of the Study:

    • To describe clinical and pathological findings in North American Indian children with familial severe neonatal cholestasis.
    • To investigate the potential role of microfilament dysfunction in this condition.
    • To establish a potential human model for microfilament dysfunction-induced cholestasis.

    Main Methods:

    • Clinical case series of 14 children with familial neonatal cholestasis.
    • Biochemical analysis including alkaline phosphatase, transaminases, and serum bile acids.
    • Histopathological examination (light and electron microscopy) of liver biopsies.
    • Immunofluorescence studies to detect cytoskeletal components.

    Main Results:

    • Jaundice resolved in some neonates, but progressive liver damage, elevated serum bile acids, and pruritus persisted.
    • Seven children required portal-systemic shunts due to early portal hypertension and variceal bleeding.
    • Light microscopy revealed hepatitis with giant-cell transformation and biliary stasis, progressing to fibrosis and cirrhosis.
    • Electron microscopy showed dilated bile canaliculi with preserved microvilli and a prominent pericanalicular filamentous web.
    • Immunofluorescence confirmed the presence of actin-containing microfilaments.

    Conclusions:

    • This cohort represents a potential human model for microfilament dysfunction-induced cholestasis.
    • Actin-containing microfilaments and their pericanalicular network are implicated in the cholestasis.
    • Further research into microfilament dynamics may offer therapeutic targets for neonatal cholestasis.

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