Endosomal phospholipid bilayer

The endosomal phospholipid bilayer is a specialized biological membrane that defines the boundaries of endosomes, facilitating the transport and sorting of materials within the cell. It plays a fundamental role in endocytosis, allowing cells to internalize nutrients, signaling molecules, and surface receptors (Nature Reviews Molecular Cell Biology, 2014). This membrane is characterized by a unique lipid composition, including the presence of lysobisphosphatidic acid (LBPA), which is essential for the formation of intraluminal vesicles and proper trafficking (Journal of Cell Science, 2008). In therapeutic applications, the endosomal phospholipid bilayer acts as a critical barrier for the delivery of nucleic acid-based drugs, necessitating the development of lipid nanoparticles and other delivery vehicles designed to trigger endosomal escape (Nature Nanotechnology, 2021). Additionally, it is a key site for viral entry, where viruses like SARS-CoV-2 or Influenza utilize the acidic environment to trigger fusion with the endosomal membrane (Science, 2020). Pharmacological modulation of this bilayer, such as through the use of lysosomotropic agents like chloroquine, can inhibit viral replication and modulate immune responses by altering endosomal pH and membrane stability (Nature Reviews Immunology, 2020).

Other names

Endosomal membraneEndocytic membraneEndosomal lipid bilayer

Modulation of endosomal pH, inhibition of viral-membrane fusion, and facilitation of endosomal escape for macromolecular drug delivery.