Cellular endocytic machinery and plasma membrane

The cellular endocytic machinery and plasma membrane represent the complex structural and functional interface responsible for the regulated internalization of extracellular materials and the recycling of cell surface components [Kaksonen & Roux, Nat Rev Mol Cell Biol, 2018]. This system involves several distinct pathways, including clathrin-mediated endocytosis (CME), caveolae-dependent endocytosis, and macropinocytosis, which are orchestrated by a vast array of proteins such as clathrin, dynamin, and various adaptor complexes [Doherty & McMahon, Annu Rev Biochem, 2009]. Although not a single therapeutic target, this machinery is fundamental to the cellular entry of diverse therapeutic agents, including monoclonal antibodies and nanoparticle-based delivery systems [Sahay et al., Nat Biotechnol, 2010]. Pathologically, the endocytic pathway is a primary route for viral and bacterial entry and is often dysregulated in cancer to promote aberrant signaling by preventing the degradation of growth factor receptors [Mellman & Yarden, Cold Spring Harb Perspect Biol, 2013]. Additionally, the uptake of proteopathic seeds in neurodegenerative diseases is mediated by these endocytic processes, making the machinery a subject of intense study for potential, albeit challenging, therapeutic intervention [Kirchhausen et al., Cold Spring Harb Perspect Biol, 2014].

Other names

Endocytic pathwayPlasma membrane interfaceVesicular transport systemCellular uptake machineryClathrin-mediated endocytosis system

Modulation of endocytic pathways occurs through the pharmacological inhibition of key assembly proteins like clathrin or scission proteins like dynamin, or through the alteration of plasma membrane lipid composition to disrupt lipid raft-mediated uptake [Kirchhausen et al., Cold Spring Harb Perspect Biol, 2014].