part of part of blood vessel endothelial cell microvascular endothelial cell 2014-06-04T15:07:42Z CL:2000008 Microvascular endothelial cells are specialized types of endothelial cells that line the interior of microvessels, the smallest of blood vessels including arterioles, capillaries, and venules. These cells, interconnected with tight junctions, are major components of the blood-brain barrier and the inner blood-retina barrier, demonstrating their crucial role in regulating the molecular transport within and across these barriers. They facilitate the exchange of nutrients and waste products between the blood and tissues, and help filter out harmful substances. Their thin, flattened structure enables efficient gas exchange and nutrient transport between the blood and tissues. They participate in the recruitment of inflammatory cells at the site of injury or infection, modulate blood vessel tone, and participate in angiogenesis, the process of new blood vessel formation. Microvascular endothelial cells are implicated in numerous pathological conditions. The dysfunction of these cells has been associated with several cardiovascular diseases including hypertension, atherosclerosis, and stroke. They are also involved in the progression of diabetes, through their role in diabetic retinopathy, and other inflammatory diseases. In cancer, these cells significantly contribute to the formation of tumor blood vessels, promoting tumor growth and metastasis. (This extended description was generated by ChatGPT and reviewed by the CellGuide team, who added references, and by the CL editors, who approved it for inclusion in CL. It may contain information that applies only to some subtypes and species, and so should not be considered definitional.) https://cellxgene.cziscience.com/cellguide/CL_2000008 Any blood vessel endothelial cell that is part of a microvascular endothelium. microvascular endothelium