Macrophage tumoricidal activity relies, mainly, on the release of Tumor Necrosis Factor alpha (TNFα) and/or on reactive oxygen or nitrogen intermediates. In the present work, we investigated the cytotoxic activity of resident peritoneal macrophages against L929 fibrosarcoma cell line in vitro and in vivo. Resident macrophages lysed L929 cells in a mechanism independent of TNFα and cell-to-cell ...

Oridonin, an active component isolated from Rabdosia rubescences, has been reported to exhibit antitumor effects, but little is known about its molecular mechanisms of action. In this study, the growth-inhibitory activity of oridonin for L929 cells is in time- and dose-dependent manner. After treatment with various concentrations of oridonin for 12 h, the majority of L929 cells underwent apopto...

The tumoricidal activity of activated macrophages has been attributed largely to the release of tumor necrosis factor (TNF), or to the production of reactive oxygen or nitrogen intermediates. The L929 tumor cell line (a murine fibroblast-like cell) when treated with actinomycin D (ActD) has been used to measure TNF alpha cytotoxicity. In the present study, we determined the cytotoxic activity o...

background: although the incidence of gastric cancer is declining during the last half century, this cancer still is the second morbid cancer in the world after lung cancer. the incidence of gastric cancer is 26 per 100,000 in iran. this study evaluated the effect of alpinia galangal on ags cells (human gastric adenocarcinoma epithelial cell line) and l929 cells (as a standard cell line origina...

The role of the nitric oxide synthase (NOS) pathway in inhibiting the ability of Rickettsia prowazekii to initially infect (invade) mouse cytokine-treated, fibroblastic L929 cells and macrophagelike RAW264.7 cells and the ability of nitric oxide (NO) to damage isolated rickettsiae were investigated. Substantial amounts of nitrite (a degradation product of NO) were produced and the initial ricke...

Treatment of three murine tumor cell lines, L929, P388, and Pan-02, in vitro with recombinant human tumor necrosis factor (rhTNF) produced evidence of oxidative damage as measured by (a) increases in intracellular glutathione levels, (b) the formation of intracellular oxidized glutathione and (c) the formation of thymine glycols in DNA. L929, the most sensitive of the three cell lines to the cy...

INTRODUCTION Saffron has been suggested to have inhibitory effects on tumoral cells. We evaluated the cytotoxic effect of aqueous extract of saffron on human transitional cell carcinoma (TCC) and mouse non-neoplastic fibroblast cell lines. MATERIALS AND METHODS Human TCC 5637 cell line and mouse fibroblast cell line (L929) were cultivated and incubated with different concentrations of aqueous...

The growth of Rickettsia prowazekii Madrid E was monitored in mouse L929 cells subcultured for several weeks in the presence of gamma interferon (IFN-gamma) to determine whether the rickettsiae would be eliminated from or would persist in these cultures. R. prowazekii exhibited two distinct patterns in these IFN-gamma-treated cultures. In some cases, IFN-gamma-induced inhibition of rickettsial ...