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Transferrin Receptor-Mediated Transcytosis
- Molecular classification
- Transcytosis Pathway, Endocytosis, Transport Mechanism
01
Overview
Transferrin receptor-mediated transcytosis (TfR-mediated transcytosis) is a cellular transport mechanism that enables the movement of macromolecules, such as iron-loaded transferrin or therapeutic agents, across physiological barriers like the blood-brain barrier (BBB). This process exploits the natural function of the transferrin receptor (TfR), which is highly expressed on brain endothelial cells and other polarized cell types. It involves receptor-mediated endocytosis, endosomal sorting, and exocytosis/transcellular release.
02
Mechanism of action
Receptor-mediated transport across cellular barriers, including the blood-brain barrier.
03
Biological functions
Iron transportMacromolecule transport across cellular barriersDrug delivery
04
Disease associations
Neurodegenerative diseasesBrain cancerOther diseases treatable via BBB penetration
05
Safety considerations
Off-target effectsLysosomal degradation of therapeuticsImmunogenicity of targeting ligandsExcessive retention in endothelial cells
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