Cellular uptake pathways and intracellular gene expression networks

Cellular uptake pathways and intracellular gene expression networks represent the integrated biological systems responsible for the internalization of extracellular materials and the subsequent regulation of genetic information. Uptake pathways, such as clathrin-mediated endocytosis, macropinocytosis, and phagocytosis, facilitate the entry of nutrients, signaling molecules, and therapeutic agents into the cell (Alberts et al., 2014). Once internalized, these components can trigger or participate in complex gene expression networks—comprising transcription factors, enhancers, and signaling cascades—that modulate cellular behavior and phenotype (Davidson, 2006). While these processes are fundamental to normal physiology, their dysregulation is a hallmark of various diseases, including cancer, where uptake of growth factors is often upregulated, and viral infections, where pathogens hijack entry pathways (NCBI, 2021). Because this term describes a broad set of biological mechanisms rather than a single protein, enzyme, or receptor, it is not considered a specific therapeutic target. Instead, drug discovery efforts typically focus on individual components within these pathways, such as specific cell-surface receptors or nuclear receptors, to achieve therapeutic effects.

Other names

Cellular entry mechanismsGene regulatory networksIntracellular signaling and expressionEndocytic pathways

Not applicable as this refers to a broad set of biological processes rather than a single molecular target.