title: Zinc supplementation therapy improves the outcome of patients with chronic hepatitis C.
abstract: We administered zinc supplementation therapy over three years to patients with chronic hepatitis C and reported and that the aspartate aminotransferase (AST) and alanine aminotaransferase (ALT) levels decreased, and platelet counts increased, significantly in the group with increased serum zinc concentrations. We are continuing this treatment to clarify the long-term consequences and report here the changes in serum zinc concentrations over seven years and compare the cumulative incidence of hepatocellular carcinoma (HCC). We administered polaprezinc to 32 patients, randomly selected for zinc therapy (treatment group), while another 30 formed the control group. We measured the serum zinc and albumin concentrations and conducted a prospective study to determine long-term outcomes. The changes and rates of change of serum zinc concentrations after seven years were 76.7 ± 18.2 µg/dl and +0.302 ± 0.30% in the treatment group and 56.7 ± 12.4 µg/dl and +0.033 ± 0.21% in the control group and had increased significantly (p = 0.0002, p = 0.0036). Progression of liver disease seemed to vary, depending on serum albumin concentrations. In the group with baseline serum albumin concentrations of 4.0 g/dl or more, the change and rate of change of serum zinc concentrations increased significantly, and the cumulative incidence of HCC tended to decrease, in the treated group. According to multivariate analysis, the factors that contribute to a reduction in the incidence of HCC are zinc therapy (risk ratio: 0.113, 95% CI: 0.015-0.870, p = 0.0362), and platelet counts (0.766, 0.594-0.989, 0.0409). Zinc supplementation therapy seems to improve liver pathology and reduce the incidence of HCC.
authors.affiliation: Division of Gastroenterology and Hepatology, Department of Medicine, Nihon University School of Medicine, 30-1, Oyaguchi Kamimachi, Itabashiku, Tokyo 173-8610, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Matsumura
authors.forename: Kazushige
authors.initials: K
authors.lastname: Nirei
authors.forename: Hitomi
authors.initials: H
authors.lastname: Nakamura
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Arakawa
authors.forename: Teruhisa
authors.initials: T
authors.lastname: Higuchi
authors.forename: Jyunpei
authors.initials: J
authors.lastname: Hayashi
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Yamagami
authors.forename: Syunichi
authors.initials: S
authors.lastname: Matsuoka
authors.forename: Masahiro
authors.initials: M
authors.lastname: Ogawa
authors.forename: Noriko
authors.initials: N
authors.lastname: Nakajima
authors.forename: Naohide
authors.initials: N
authors.lastname: Tanaka
authors.forename: Mitsuhiko
authors.initials: M
authors.lastname: Moriyama