TAM receptors are dispensable in the phagocytosis and killing of bacteria.

TAM receptors are dispensable in the phagocytosis and killing of bacteria.
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DOI:
10.1016/j.cellimm.2009.06.006
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发表时间:
2009
影响因子:
4.3
通讯作者:
Matsushima, Glenn K.
Matsushima, Glenn K.
中科院分区:
医学4区
文献类型:
--
作者:
Williams, Julie C.;Craven, Robin R.;Earp, H. Shelton;Kawula, Tom H.;Matsushima, Glenn K.

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Many receptors that are employed for the engulfment of apoptotic cells are also used for the recognition and phagocytosis of bacteria. Tyro3, Axl, and Mertk (TAM) are important in the phagocytosis of apoptotic cells by macrophages. Animals lacking these receptors are hypersensitive to bacterial products. In this report, we examine whether the TAM receptors are involved in the phagocytosis of bacteria. We found that macrophages lacking Mertk, Axl, Tyro3 or all three receptors were equally efficient in the phagocytosis of Gram-negative E. coli. Similarly, the phagocytosis of E. coli and Gram-positive S. aureus bioparticles by macrophages lacking TAM receptors was equal to wild-type. In addition, we found that Mertk did not play a role in killing of extracellular E. coli or the replication status of intracellular F. tularensis. Thus, while TAM receptors may regulate signal transduction to bacterial components, they are not essential for the phagocytosis and killing of bacteria.
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