Biomedical research institute
Biomedical research institute
 | Florence Niedergang DR1 CNRS |
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Phagocytosis is the mechanism of capture and degradation of pathogens or debris that is performed by professional cells of the immune system. We study the mechanims of capture and degradation by phagocytic cells, their impact on immune responses and their alterations by viral infections, which can lead to the development of bacterial co-infections or uncontrolled inflammation. |
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Professional phagocytes play a major role in innate and adaptive immune responses. Phagocytosis and degradation of invading microorganisms or debris is crucial for bacterial clearance and resolution of inflammation. Therefore, it is crucial to understand the mechanisms of phagocytosis, especially of cell debris or microorganisms.
Our first goal is to dissect the mechanisms used by phagocytes, in particular the coordinated activities of signaling pathways, membrane trafficking and cytoskeleton dynamics, and their effect on the outcome of immune responses, including presentation of antigens to B cells. Second, we analyze how viruses, including HIV, respiratory viruses associated with lung inflammation or Zika virus, impair these phagocytic and activation functions.
Anna Mularski and Florence Niedergang (2020). Force Measurement of Living Professional Phagocytes of the Immune System. Australian Journal of Chemistry - https://doi.org/10.1071/CH19409
Lê-Bury G, Deschamps C, Kizilyaprak C, Blanchard W, Daraspe J, Dumas A, Gordon MA, Hinton JCD, Humbel BM, Niedergang F. Increased intracellular survival of Salmonella Typhimurium ST313 in HIV-1-infected primary human macrophages is not associated with Salmonella hijacking the HIV compartment. Biol Cell. 2020 Jan 10. doi: 10.1111/boc.201900055
Jubrail, J., Africano-Gomez, K., Herit, F., Mularski, A., Bourdoncle, P., Oberg, L, Israelsson, E., Burgel, P-R., Mayer, G., Mootoosamy Cunoosamy, D., Kurian, N., and Niedergang F. Arpin is critical for phagocytosis in macrophages and is targeted by human rhinovirus. EMBO Rep. (2020). e47963. doi: 10.15252/embr.201947963
Boncompain G, Herit F, Tessier S, […], Brelot A, Niedergang F, Perez F. Differential screening identifies molecules specifically inhibiting CCR5 transport to the cell surface and HIV infection. bioRxiv. Doi.org/10.101364927. Science Advances (2019); 5: eaax0821. doi: 10.1126/sciadv.aax0821
Niedergang F. Dendritic cells mature to resist lamin degradation and herpes virus release. J. Cell Biol. (2019). 4;218(2):387-388. doi: 10.1083/jcb.201812051.
Jubrail, J., Africano-Gomez, K., Herit, F., Baturcam, E., Mayer, E., Mootoosamy Cunoosamy, D., Kurian, N., and Niedergang, F. HRV16 impairs macrophages cytokine response to a secondary bacterial trigger. Front. Immunol. (2018) 9:2908
Lê-Bury G and Niedergang F Defective phagocytic properties of HIV-infected macrophages: how might they be implicated in the development of invasive Salmonella Typhimurium ? Front. Immunol. (2018) 9:531
Niedergang, F. and Grinstein, S. How to build a phagosome: new concepts for an old process. Curr Op Cell Biol (2018) 50:57-63
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