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lüll Evolving concepts of the pathogenesis and treatment of the pruritus of cholestasis Jones EA; Bergasa NVCan J Gastroenterol 2000[Jan]; 14 (1): 33-40The site of the pathogenic events responsible for initiating the pruritus of cholestasis has been assumed to be the skin. This assumption cannot be excluded but is not supported by convincing data. Empirical therapies such as anion exchange resins and rifampicin often appear to be partially efficacious. Recent evidence suggests that altered neurotransmission in the brain may contribute to this form of pruritus. In particular, the hypothesis that increased central opioidergic tone is involved is supported by three observations: opiate agonists induce opioid receptor-mediated scratching activity of central origin, central opioidergic tone is increased in cholestasis and opiate antagonists reduce scratching activity in cholestatic patients. Apparent subjective ameliorations of pruritus following intravenous administration of ondansetron to cholestatic patients suggest that altered serotoninergic neurotransmission may also contribute to this form of pruritus.|Brain/physiology[MESH]|Cholestasis/*complications/physiopathology[MESH]|Humans[MESH]|Liver Transplantation[MESH]|Narcotic Antagonists/therapeutic use[MESH]|Pruritus/*etiology/physiopathology/*therapy[MESH]|Receptors, Opioid/physiology[MESH]|Skin/innervation[MESH]|Synaptic Transmission/physiology[MESH] |