Abstract:
:This study aimed to co-culture Jurkat T lymphocytes with inactivated Mycobacterium tuberculosis (Mtb H37Ra), explore whether T lymphocytes could phagocytose H37Ra cells, and determine the underlying mechanism. Jurkat T lymphocytes were co-cultured with H37Ra cells, and confocal laser scanning microscopy, electron microscopy, and flow cytometry techniques were used to identify phagocytosis and elucidate its mechanism. After Jurkat T lymphocytes phagocytosed H37Ra cells, the cell body became larger, with abundant cytoplasm, the portion of the nucleus closest to the bacterium deformed, long and short pseudopodia were extended, and the folds of the cell membrane formed depressions that created phagocytic vesicles surrounding the bacterium. The macropinocytosis inhibitor amiloride and the cytoskeletal inhibitor cytochalasin D were found to inhibit phagocytic efficacy; serum complements might enhance phagocytosis through opsonization. Jurkat T lymphocytes could actively phagocytose inactivated Mtb via the macropinocytotic mechanism. Actin remodeling played an important role in the macropinocytotic process. Serum complements may regulate phagocytosis.
journal_name
Mol Immunoljournal_title
Molecular immunologyauthors
Zhang M,Zhu Q,Shi M,Liu Y,Ma L,Yang Y,Feng D,Dai W,Zhang L,Kang T,Chen P,He Y,Liu T,Zhao Q,Wang W,Zhi J,Feng G,Zhao Gdoi
10.1016/j.molimm.2015.04.018subject
Has Abstractpub_date
2015-08-01 00:00:00pages
429-38issue
2eissn
0161-5890issn
1872-9142pii
S0161-5890(15)00377-6journal_volume
66pub_type
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