part of intestinal crypt stem cell epithelial cell of small intestine intestinal crypt stem cell of small intestine An intestinal stem cell that is located in the small intestine crypt of Liberkuhn. These stem cells reside at the bottom of crypts in the small intestine and are highly proliferative. They either differentiate into transit amplifying cells or self-renew to form new stem cells. stem cell of small intestine crypt of Lieberkuhn Intestinal crypt stem cells of the small intestine are a type of adult stem cell intimately involved in the continuous replenishment of the intestinal epithelium, the innermost layer of the intestine responsible for nutrient absorption. These cells, located within the crypts of Lieberkühn, are the origin of various cell lineages that make up the functional units of the small intestine. They possess self-renewal ability, an essential feature of stem cells, which allows them to maintain a steady population in the small intestine. One of the critical roles of intestinal crypt stem cells is to drive the continual renewal process taking place in the small intestine every 3-5 days. By proliferating intensively, these cells produce transient amplifying (TA) cells that are characterized by quick division and progressive differentiation. These cells eventually differentiate into specialized cell types, encompassing absorptive enterocytes, mucin-secreting goblet cells, hormone-secreting enteroendocrine cells, and Paneth cells, all of which have essential roles in digestion and nutrient absorption in the small intestine. Intestinal crypt stem cells of the small intestine are also play a significant part in injury recovery. Under regular conditions, these cells primarily exist in an active state, facilitating the constant renovation of the gut lining. However, upon injury or loss of regular intestinal crypt stem cells reserve intestinal stem cells, a slow-cycling and radio-resistant population, can be stimulated to take over the duties of active crypt stem cells. Such plasticity provides a powerful regenerative mechanism that ensures the intestinal epithelium's function and structural integrity amidst diverse conditions. (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.) crypt stem cell of small intestine https://cellxgene.cziscience.com/cellguide/CL_0009017 crypt of Lieberkuhn of small intestine