Hepatic stellate cell in the cell body store vitamin A as retinol ester. The function and role of quiescent hepatic stellate cells is unclear. Recent evidence suggests a role as a liver-resident antigen-presenting cell, presenting lipid antigens to and stimulating proliferation of NKT cells. When the liver is damaged, stellate cells can change into an "activated" state. The activated stellate cell is characterized by proliferation, contractility, and chemotaxis. This state of the stellate cell is the main source of extracellular matrix production in liver injury. This attribute makes it a key factor in the pathophysiology of the liver. The amount of stored vitamin
Proper adjective adjectives. In general, an adjective is capitalized if its meaning is "pertaining to "X"", where "X" is some specific person, place, language, or organized group. Most capitalized adjectives are derived from proper nouns; for example, the proper adjective "American" is derived from the proper noun "America". Sometimes, an adjective is capitalized because it designates an ethnic group with a shared culture, heritage, or ancestry. This usage asserts the existence of a unified group with common goals. For example, in Canadian government documents, "Native" and "Aboriginal" are capitalized. An adjective can lose its capitalization when it takes on new meanings, such