Macroautophagy is a conserved lysosome-dependent degradation pathway in which cytoplasmic material is sequestered into double-membrane autophagosomes and delivered to lysosomes for degradation and recycling. The pathway supports cellular homeostasis during nutrient limitation, organelle stress, protein-aggregate accumulation, infection, differentiation, and tissue remodeling by coupling cargo sequestration, autophagosome maturation, lysosomal fusion, and degradation of cargo-derived macromolecules. The core molecular sequence includes initiation by nutrient- and stress-regulated autophagy machinery, autophagosome nucleation, LC3/ATG8-family conjugation to autophagosomal membranes, cargo selection through receptors such as SQSTM1/p62, autophagosome-lysosome fusion, and lysosomal degradation. LC3 was identified as a mammalian homolog of yeast Atg8 that localizes to autophagosomal membranes after processing, and p62/SQSTM1 was shown to connect ubiquitinated cargo with autophagic degradati
Macroautophagy Pathway
Macroautophagy is an autophagy process that is different from conventional autophagy and involves the clearance of large intracellular and extracellular particles through the fusion of vacuolar (macropinosome) contents. Various techniques can be used to detect macroautophagy, including microscopic observation of macroautophagic vacuole formation, flow cytometry, fluorescent probe labeling, and expression analysis of related genes or proteins. The study of macroautophagy helps to understand the function of this autophagy process in immune response, pathogen clearance, cell survival, and disease development.
Related Experimental Schemes
