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Participation of CD14 in the Phagocytosis of Smooth‐Type Salmonella typhimurium by the Macrophage‐Like Cell Line, J774.1
Author(s) -
Onozuka Kazuyasu,
Kirikae Teruo,
Kirikae Fumiko,
Suda Yasuo,
Kusumoto Shoichi,
Yamamoto Shunsuke,
Shimamura Tadakatsu,
Nakano Masayasu
Publication year - 1997
Publication title -
microbiology and immunology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.664
H-Index - 70
eISSN - 1348-0421
pISSN - 0385-5600
DOI - 10.1111/j.1348-0421.1997.tb01924.x
Subject(s) - phagocytosis , biology , microbiology and biotechnology , cd14 , macrophage , cell culture , salmonella , mutant , in vitro , bacteria , biochemistry , flow cytometry , gene , genetics
The role of CD14 in the phagocytosis and killing of microorganisms was investigated using macrophage‐like cell lines, CD14‐positive J774.1 cells and CD14‐negative mutant J7.DEF3 cells derived from J744.1 cells. The cells were infected with Salmonella typhimurium organisms of the smooth (S)‐form LT2, mutant rough (R)‐form TV148 or Staphylococcus aureus 248βH. At 30 or 180 min incubation, the cells were washed and disrupted. Colony‐forming units (CFUs) liberated from the disrupted cells were determined by quantitative cultivation, and the phagocytic index and killing rate were calculated. Both the phagocytic index and killing rate of J774.1 cells against LT2 organisms were greater than those of J7.DEF.3 cells. However, the index and rate of J774.1 cells against TV148 and 248βH organisms were similar to those of the J7.DEF.3 cells. The phagocytosis of LT2 organisms by J774.1 cells was partially inhibited by S‐form LPS (S‐LPS) and anti‐CD14 antibody, but not by R‐chemotype LPS (R‐LPS). These results suggest that CD14 participates in the phagocytosis of S‐form Salmonella.