Abstract
Eukaryotic cells are capable of internalizing different types of cargo by plasma membrane ruffling and forming vesicles in a process known as endocytosis. The most extensively characterized endocytic pathways are clathrin-coated pits, lipid raft/caveolae-mediated endocytosis, phagocytosis, and macropinocytosis. Macropinocytosis is unique among all the endocytic processes due to its nonselective internalization of extracellular fluid, solutes, and membrane in large endocytic vesicles known as macropinosomes with unique susceptibility toward Na+/H+ exchanger inhibitors. Range of cell types capable of macropinocytosis and known to play important role in different physiological processes, which include antigen presentation, nutrient sensing, migration, and signaling. Understanding the physiological function of macropinocytosis will be helpful in filling the gaps in our knowledge and which can be exploited to develop novel therapeutic targets. In this chapter, we discuss the different molecular mechanisms that initiate the process of macropinocytosis with special emphasis on proteins involved and their diversified role in different cell types.
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Acknowledgment
The work was supported by Start-up Research Grant (SRG/2019/001049), from the Science and Engineering Research Board (SERB), New Delhi, India (R.M.).
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The authors have declared that no conflict of interest exists.
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Mishra, R., Gupta, Y., Ghaley, G., Bhowmick, N.A. (2022). Functional Diversity of Macropinocytosis. In: Commisso, C. (eds) Macropinocytosis. Subcellular Biochemistry, vol 98. Springer, Cham. https://doi.org/10.1007/978-3-030-94004-1_1
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