alexa Repeated induction of nitric oxide synthase and leishmanicidal activity in murine macrophages
Dermatology

Dermatology

Journal of Clinical & Experimental Dermatology Research

Author(s): Cunha FQ, Assreuy J, Xu D, Charles I, Liew FY

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Murine macrophages express high levels of nitric oxide (NO) synthase and produce large amounts of NO when stimulated with interferon-y plus lipopolysaccharide in vitro. The expression of NO synthase peaks at 12 h after stimulation and declines rapidly to the background level by 72 h. These macrophages can be repeatedly reactivated to express similar levels of NO synthase. The reactivation is not due to newly divided cells since peritoneal macrophages which do not divide in vitro and J774 cells cultured in the presence of colchicine can also be restimulated to express NO synthase. The reactivation is accompanied by re-expression of NO synthase mRNA, as assessed by polymerase chain reaction analysis. Furthermore, the reactivated macrophages are fully capable of killing the intracellular protozoan parasite Leishmania major.

This article was published in Eur J Immunol and referenced in Journal of Clinical & Experimental Dermatology Research

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