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Studies of the influence of immunological and serological factors from patients with cholestasis due to alcoholic or viral hepatitis on biliary function in the rat

Abstract. Studies were undertaken to (a) determine if cholestasis in alcoholic or viral hepatitis is related to immunologic hyperreactivity as suggested for cholestasis due to type‐II drug‐induced hepatitis, and (b) evaluate possible mechanisms involved in lymphokine‐induced cholestasis. Results indicate that a cholestatic factor exists in alcoholic and acute viral hepatitis. Supernatants of lymphocytes from patients with alcoholic hepatitis stimulated by an extract of alcoholic hyalin evoked a 28%pL7·3 SEM reduction in rat bile flow (P<0·03). Supernatants of lymphocytes from patients with acute viral hepatitis activated by liver‐specific protein caused a reduction in rat bile flow of 24%pL5·9 SEM (P<0·03). A decrease in bile flow also occurred following injections of sera from patients with alcoholic or acute viral hepatitis. In contrast, injection of supernatants of non‐stimulated lymphocytes or those from chronic active hepatitis or healthy subjects did not produce a significant change in bile flow. Supernatants of stimulated lymphocytes from tuberculin‐sensitized guinea pigs caused a similar decrease in rat bile flow and reduced excretion of human secretory immunoglobulin A (IgA). Despite reductions in rat bile flow there were no alterations in liver morphology, liver plasma membrane Na‐K‐ATPase activity, microsomal cholesterol‐7α‐hydroxylase activity or low‐dose indocyanine green clearance during the period of observation.