The uptake of Photofrin by murine peritoneal macrophages in vivo and in vitro was examined. Cellular Photofrin content was measured either by performing a fluorometric assay or by using )4C-labeled drug. For comparison, the uptake of Photofrin by murine SCCVII tumor cells (squamous cell carcinoma) was also examined under the same conditions. The data demonstrate that macrophages have a much gre...

We investigated the time-course involved in the conversion of mouse blood monocytes in vitro in cells capable of anchorage-independent growth. Two criteria were used to define when monocytes were fully converted to cells similar to mononuclear phagocytes present in inflammatory exudate, such as thioglycollate medium (TM)-elicited peritoneal exudate. They were the production of high levels of pl...

One of the mechanisms involved in the regulation of the immune system by steroid hormones could be the monocytic-macrophage system. In this study the effect of the male hormone 5a-DHT on cytokine release by peritoneal macrophages (mΦ) of male and female NZB/BALBc mice was investigated. Macrophages from male mice activated with LPS produced a greater amount of IL-1β (21.8%) (p<0.05) and IL-...

Exposure of macrophages to asbestos fibers resulted in enhancement of the production of oxygen radicals, determined by a lucigenin enhanced chemiluminescence (LEC) assay, a formation of thiobarbituric acid reactive substances (TBARS), a LDH release into the incubation mixture, and a rapid lysis of the cells. Rutin (Rut) and quercetin (Qr) were effective in inhibiting LEC, TBARS formation, and r...

A strain of avian influenza A virus was adapted to grow in mouse peritoneal macrophages in vitro. The adapted strain, called M-TUR, induced a marked cytopathic effect in macrophages from susceptible mice. Mice homozygous (A2G) or heterozygous (F1 hybrids between A2G and several susceptible strains) for the gene Mx, shown previously to induce a high level of resistance towards lethal challenge b...

background: macrophages have important role in defense against herpes simplex virus type-1 (hsv-1). the present study was performed to determine the viability and nitric oxide (no) production by hsv-1 infected mouse peritoneal macrophages (him).   method: the viability of macrophages was evaluated using mtt reduction assay and the production of nitrite using griess method.   results: the abilit...

nitric oxide (no) derived from activated macrophages has been shown to be crucial for the host's leishmanicidal activities. excess no, however, can in¬duce apoptosis in some cell types, including macrophages. in the present inves¬tigation, we studied the role of no in inducing apoptosis of balb/c mice mac¬rophages infected with leishmania major in vitro. the peritoneal macrophages were harveste...

Salimuddin,Akitoshi Nagasaki, Tomomi Gotoh, Hirotaka Isobe, and Masataka Mori. Regulation of the genes for arginase isoforms and related enzymes in mouse macrophages by lipopolysaccharide. Am. J. Physiol. 277 (Endocrinol. Metab. 40): E110–E117, 1999.—Arginase exists in two isoforms, the hepatic (arginase I) and extrahepatic types (arginase II). Arginase I is markedly induced in rat peritoneal m...

brucellosis is an infectious disease with high impact on innate immune responses which is induced partly by its dna. in the present study the potential differences of wild type and patients isolates versus attenuated vaccine strains in terms of cytokines, ros and no induction on murine splenocytes and peritoneal macrophages were investigated. this panel varied in base composition and included d...