Liver sinusoidal endothelial cell (LSEC)

A **liver sinusoidal endothelial cell** (LSEC) is a highly specialized, fenestrated endothelial cell lining the liver sinusoids (specialized capillaries of the liver)[3][1]. These cells constitute the interface between blood flowing through the liver and the parenchymal (working) liver cells. LSECs are morphologically characterized by their open fenestrae ("sieve plates"), lack of a basement membrane, and high capacity for endocytosis and clearance of macromolecules from the bloodstream[3][5][7]. Their primary physiological roles include filtration and clearance of circulating waste, immune surveillance (antigen presentation and immune cell recruitment), regulation of liver blood flow, and support for hepatic regeneration. LSECs are central to liver homeostasis and play significant roles in the pathophysiology of liver diseases (fibrosis, cancer, inflammation, infection, and aging)[5][2][6]. Although not a canonical molecular drug target, they are increasingly studied for their role in disease progression and as potential targets for cell-specific drug delivery systems and regenerative therapies[4][7]. For molecularly specific entries (receptors/enzymes), a more precise target name and class should be used.

Other names

Sinusoidal endothelial cellHepatic sinusoidal endothelial cellLSEC

Not applicable—no specific drugs act via direct biochemical modulation of LSECs as a target, though the cell's clearance function is relevant for nanomedicine/drug delivery and some experimental therapies