Albumin Transcytosis
Albumin Transcytosis - Related Videos
02:28
Assessing Transcytosis of E. coli Across Intestinal Epithelial Monolayers
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2025
Source: Islam, A., et al., Assessment of Intestinal Transcytosis of Neonatal Escherichia coli Bacteremia Isolates. J. Vis. Exp. (2023)This video demonstrates the procedure for assessing transcytosis of neonatal Escherichia coli across intestinal epithelial monolayers using transwell inserts, electrical resistance measurement, and bacterial quantification.
01:15
Transcytosis of IgG
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2023
Transcytosis is the process in which molecules are internalized by endocytosis, transported across the cell, and released through exocytosis from the opposite end of the cell. Molecules such as insulin, immunoglobulins, and certain nutrients are transferred through the recycling endosomes by recycling and transcytosis. IgG molecules from a mother undergo transcytosis starting around 13 weeks of gestation. The amount of IgG transferred and entering the fetal blood circulation increases with...
00:58
Recycling Endosomes and Transcytosis
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2023
The recycling endosome, also known as the endosomal recycling compartment (ERC), is a part of the slow-recycling process of the endocytic pathway. Molecules internalized through receptor-mediated endocytosis are either degraded in the lysosomes or are recycled to the plasma membrane through the fast- or slow-recycling route. The recycling endosome is not a single organelle but an extensively tubulated network of recycling pathways. It functions in storing molecules or transporting them across...
01:18
Vesicular Trasport: Endocytosis, Transcytosis and Exocytosis
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2024
Vesicular transport is a cellular process that encompasses the engulfment of particles or dissolved substances by cells. It involves endocytosis, transcytosis, and exocytosis. Endocytosis is a cellular mechanism that involves the inward folding of the cell membrane to create vesicles that capture and transport large drug molecules. This process comprises two distinct methods: pinocytosis (often referred to as "cell drinking") and phagocytosis (often referred to as "cell eating"). Pinocytosis is...
08:32
Assessment of Intestinal Transcytosis of Neonatal Escherichia coli Bacteremia Isolates
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Cited by 1 •
2023
Escherichia coli causes sepsis in neonates who ingest the bacteria around the time of birth. The process involved in E. coli’s ability to travel from the enteric tract to the bloodstream is poorly understood. This in vitro model assesses the ability of E. coli strains to travel through the intestinal epithelial cells.
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Albumin first binds the gp60 receptor on the endothelial surface. That interaction activates caveolin-1-associated caveolae, which are small membrane-associated structures that internalize the bound protein. The albumin-containing compartment then moves through the cell and releases its cargo at the opposite membrane, linking receptor engagement to directional vascular transport.
Caveolae provide the membrane-based route for albumin uptake and intracellular passage. Their association with caveolin-1 connects gp60 activation to formation of a transport compartment rather than leaving albumin to cross the endothelial barrier by an unspecified route. This organization helps regulate how plasma protein reaches tissue-facing surfaces and influences vascular permeability.
Release at the membrane opposite the entry site allows albumin to move between the blood-facing and tissue-facing sides of the endothelium. That directional transfer contributes to protein distribution between blood and tissues, while also affecting how endothelial barriers manage permeability and fluid balance. Disruption of this control may be relevant to edema and inflammation.
A useful investigation follows the sequence from albumin binding to gp60, caveolin-1-associated caveola formation, cellular internalization, intracellular shuttling, and release at the opposite membrane. Linking each stage to changes in protein distribution or barrier behavior helps distinguish receptor engagement from later transport events and clarifies how endothelial cells control tissue exposure to albumin.
The pathway provides a framework for examining how endothelial barriers regulate plasma-protein movement. Because albumin distribution is connected with vascular permeability and fluid balance, altered transport may help researchers interpret changes associated with edema and inflammation. Studying receptor-mediated passage can therefore connect cellular trafficking events with broader changes in vascular barrier behavior.
Albumin or albumin-binding systems can be investigated as carriers intended to improve drug exposure across endothelial barriers. Their relevance follows from albumin’s regulated interaction with gp60 and caveolae, which provides a route for movement through endothelial cells. This strategy may help researchers explore how drug transport can be coordinated with vascular protein-trafficking mechanisms.