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'''Liver Sinusoidal Endothelial Cell''' (LSEC) is a specialized type of [[endothelial cell]] found in the [[liver]]. These cells line the [[sinusoids]] of the liver and play a crucial role in the filtration and clearance of blood, as well as in the regulation of [[immune response]]s.

== Structure ==

LSECs are unique among endothelial cells due to their fenestrated structure. They possess numerous small pores, or [[fenestrae]], which allow for the exchange of molecules between the blood and the liver [[parenchyma]]. These fenestrae are grouped into sieve plates and lack a [[basement membrane]], which further facilitates the exchange of substances.

== Function ==

LSECs perform several important functions in the liver:

* '''Filtration and Clearance:''' LSECs filter the blood that flows through the liver, removing harmful substances and waste products. They also play a role in the clearance of [[lipoproteins]] and [[glycoproteins]] from the circulation.

* '''Immune Regulation:''' LSECs are involved in the regulation of immune responses in the liver. They can present [[antigen]]s to [[T cells]], contributing to the immune surveillance of the liver.

* '''Liver Regeneration:''' LSECs produce growth factors such as [[vascular endothelial growth factor]] (VEGF) and [[hepatocyte growth factor]] (HGF), which promote the regeneration of liver tissue.

== Clinical Significance ==

Alterations in the structure and function of LSECs have been associated with several liver diseases, including [[cirrhosis]], [[hepatitis]], and [[liver cancer]]. For example, in cirrhosis, the fenestrae of LSECs can become defenestrated, impairing the filtration function of these cells and contributing to the progression of the disease.

== Research ==

Research on LSECs is ongoing, with a focus on understanding their role in liver disease and exploring their potential as therapeutic targets. For example, strategies to restore the fenestrated structure of LSECs are being investigated as a potential treatment for cirrhosis.

== See Also ==

* [[Liver]]
* [[Endothelial cell]]
* [[Sinusoid (blood vessel)]]
* [[Liver disease]]

== References ==

== External Links ==

[[Category:Cell biology]]
[[Category:Hepatology]]
[[Category:Immunology]]
[[Category:Anatomy of the liver]]

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Liver sinusoidal endothelial cell - Revision history

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Prab: CSV import