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Influence of melatonin on immunotoxicity of lead

Authors
Kim, YOPyo, MYKim, JH
Issue Date
Oct-2000
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Keywords
melatonin; lead nitrate; immunocompetence; immunotoxicity
Citation
INTERNATIONAL JOURNAL OF IMMUNOPHARMACOLOGY, v.22, no.10, pp.821 - 832
Journal Title
INTERNATIONAL JOURNAL OF IMMUNOPHARMACOLOGY
Volume
22
Number
10
Start Page
821
End Page
832
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/16736
DOI
10.1016/S0192-0561(00)00043-6
ISSN
0192-0561
Abstract
The results suggested that immunotoxicity induced by lead [Pb, as Pb(NO3)(2)] was significantly restored or prevented by melatonin (MLT). MLT (10 or 50 mg/kg) was orally administered to ICR mice daily for 28 days, and Pb was also administered at 35 mg/kg in the same way 2 h after the administration of MLT, and the normal mice were given vehicle. Within the Pb plus MLT-treated group, the body weight gains and the relative thymus weights were significantly increased when compared with the treatment of Pb alone. The relative spleen and liver weights were increased by the treatment of Pb alone, and then restored to normal value by MLT treatment. Hemagglutination (HA) titer, plaque-forming cell response to sheep red blood cell (SRBC), and secondary IgG antibody response to BSA were significantly enhanced in the Pb plus MLT-treated mice, as opposed to when compared with the treatment of Pb alone. The mitogenic response of splenic T cell to concanavalin A and that of B cells to lipopolysaccharide was remarkably increased by MLT treatment when compared with treatment of Pb alone. Splenic CD4(+) cells were significantly increased by MLT treatment when compared with treatment of Pb alone. In case of CD8(+) cells, the slight enhancement was observed in MLT treatment. Splenic T and B cells were significantly increased by MLT treatment when compared with the treatment of Pb alone. The natural killer cell, phagocytic activity and the number of peripheral leukocytes were significantly enhanced in Pb plus MLT-treated mice when compared with the treatment of Pb alone. (C) 2000 International Society for Immunopharmacology. Published by Elsevier Science Ltd. All rights reserved.
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