part of part of epithelial cell of large intestine transit amplifying cell of colon A rapidly proliferating population of cells that differentiate from stem cells of the intestinal crypt of the colon. Stem cells located in the crypts of Lieberkühn give rise to proliferating progenitor or transit amplifying cells that differentiate into the four major epithelial cell types. These include columnar absorptive cells or enterocytes, mucous secreting goblet cells, enteroendocrine cells and paneth cells. Transit amplifying cells (TACs) are an intermediate, undifferentiated population between stem cells and differentiated cells. They can be found in multiple regions such as the small intestine and the colon. TACs of the colon, are integral components of the colonic crypts and vital players in the maintenance of colonic tissue. These cells serve a critical function in the rapid and constant renewal of the epithelium lining the colon, with the whole epithelial surface renewed approximately every 5-7 days. They divide rapidly and progressively differentiate into mature columnar epithelium cells, including enterocytes, goblet cells, and enteroendocrine cells. The continued proliferation of transit amplifying cells is fundamental to maintain the balance in cell population while preventing tissue degeneration and maintaining a state of homeostasis. However, uncontrolled proliferation and compromised differentiation capacity can contribute to the development of colon cancers. (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.) colon transit amplifying cell transient amplifying cell of colon https://cellxgene.cziscience.com/cellguide/CL_0009011 transient amplifying cell of crypt of Lieberkuhn of colon transit-amplifying cell of colon transit amplifying cell of large intestine transit amplifying cell of crypt of Lieberkuhn of colon transit amplifying cell of gut crypt of Lieberkuhn of colon