although peritoneal resident macrophages ( prm ) or peritoneal exudate macrophages ( pem ) were activated by lipopolysaccharide ( lps ) to kill tumor cells in vitro , lung macrophages ( lm ) obtained by mincing lung tissues or by harvesting bronchial lavage were not activated by lps under any experimental conditions , i.e. , different lps concentrations , incubation times and cytotoxicity assay methods .
C0024109
lung
C0819757
lung tissues