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Immunomodulatory Effects of Esculetin (6,7-dihydroxycoumarin) on Murine Lymphocytes and Peritoneal Macrophages

Immunomodulatory Effects of Esculetin (6,7-dihydroxycoumarin) on Murine Lymphocytes and Peritoneal Macrophages

Kwok-nam Leung, Pui-yin Leung, Lai-ping Kong, Po-ki Leung

Cell Mol Immunol. 2005 Jun;2(3):181-8.

PMID: 16212885

Abstract:

Coumarins belong to a diverse group of naturally occurring non-nutrient phytochemicals known as benzo-alpha-pyrones. In this study, esculetin, a 6,7-dihydroxy derivative of coumarin with pleiotropic biological activities, was found to have no significant cytotoxic effect on normal murine macrophages, but it could increase the in vivo migration of the thioglycollate-elicited macrophages in a dose-dependent manner. Moreover, esculetin significantly increased the endocytic activity, and augmented the nitric oxide production and iNOS gene expression in LPS-treated macrophages. In addition, in vivo administration of esculetin into mice was shown to increase the mitogenesis of splenic lymphocytes towards Con A and LPS stimulations, and induced the LAK activity of splenic lymphocytes. Collectively, our results indicate that esculetin could exert immunomodulatory effects on murine macrophages and lymphocytes, both in vitro and in vivo, and this might be one of the possible mechanisms by which coumarins can exert their chemopreventive and anti-tumor activities in vivo.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP305011	6,7-Dihydroxycoumarin		305-01-1	Price

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