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Plasma membrane abundance dictates phagocytic capacity and functional crosstalk in myeloid cells

Winer, B. Y.; Settle, A. H.; Yakimov, A. M.; Jeronimo, C.; Lazarovt, T.; Tipping, M.; Saoi, M.; Sawh, A.; Sepp, A.-L. L.; Galiano, M.; Perry, J. S. A.; Wong, Y. Y.; Geissmann, F.; Cross, J.; Zhou, T.; Kam, L. C.; Pasoli, H. A.; Hohl, T.; Cyster, J. G.; Weiner, O.; Huse, M.

2023-09-13 cell biology
10.1101/2023.09.12.556572 bioRxiv
Show abstract

Professional phagocytes like neutrophils and macrophages tightly control what they eat, how much they eat, and when they move after eating. We show that plasma membrane abundance is a key arbiter of these cellular behaviors. Neutrophils and macrophages lacking the G-protein subunit G{beta}4 exhibit profound plasma membrane expansion due to enhanced production of sphingolipids. This increased membrane allocation dramatically enhances phagocytosis of bacteria, fungus, apoptotic corpses, and cancer cells. G{beta}4 deficient neutrophils are also defective in the normal inhibition of migration following cargo uptake. In G{beta}4 knockout mice, myeloid cells exhibit enhanced phagocytosis of inhaled fungal conidia in the lung but also increased trafficking of engulfed pathogens to other organs. These results reveal an unexpected, biophysical control mechanism lying at the heart of myeloid functional decision-making.

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"Similar papers" are the closest papers from that journal in the model's embedding space. They show what the match is built on, but the ranking comes mostly from a classifier over the whole training set, not from these examples alone.