Cellular uptake and trafficking pathways

Cellular uptake and trafficking pathways refer to the collective biological processes responsible for the internalization of extracellular substances and the organized movement of proteins, lipids, and other cargo between organelles. These pathways, including endocytosis, phagocytosis, and various vesicular transport mechanisms, are essential for nutrient uptake, receptor signaling regulation, and the maintenance of cellular membrane composition (Alberts et al., Molecular Biology of the Cell, 2014). In many diseases, these pathways are hijacked or dysfunctional; for instance, viruses often exploit endocytic routes for entry, and cancer cells may upregulate specific trafficking routes to enhance growth factor signaling (Doherty & McMahon, Annu Rev Biochem, 2009). While the pathways themselves are broad categories rather than single molecular targets, specific proteins within them—such as clathrin, dynamin, and Rab GTPases—serve as focal points for therapeutic development and drug delivery strategies (Mellman & Yarden, Cold Spring Harb Perspect Biol, 2013). Furthermore, understanding these pathways is crucial for the design of nanomedicines and antibody-drug conjugates that rely on receptor-mediated endocytosis for intracellular release (Sahay et al., Nature Nanotechnology, 2010). Modulating these pathways can influence drug bioavailability and the clearance of toxic protein aggregates in neurodegenerative conditions (Hu et al., Cell Commun Signal, 2015).

Other names

Endocytosis and intracellular transportVesicular traffickingEndocytic pathwaysIntracellular protein traffickingVesicle-mediated transport

Modulation of endosomal pH, inhibition of microtubule polymerization, or blockade of vesicle fission and fusion proteins such as dynamin or clathrin-mediated assembly.