Cellular signaling in rapid intestinal epithelial restitution: implication of polyamines and K+ channels.
Epithelial cells line the gastrointestinal (GI) mucosa and form an important barrier that protects the subepithelial tissue against a wide array of noxious substances, allergens, viruses, and luminal microbial pathogens. Restoration of mucosal integrity following injury requires epithelial cell decisions that regulate signaling networks controlling gene expression, survival, migration, and proliferation. Over the past few years, polyamines have been shown to play a critical role in GI mucosal repair, and the control of cellular polyamines is a central convergence point for the multiple signaling pathways. Both the function of polyamines in rapid intestinal mucosal epithelial restitution and the underlying mechanism, especially the implication of K(+) channel activity, are the subject of this mini-review article.
Wang
Jian-Ying
JY
Department of Surgery, University of Maryland School of Medicine and Baltimore Veterans Affairs Medical Center, Baltimore, Maryland 21201, USA. jwang@smail.umaryland.edu
D000818:Animals; D002465:Cell Movement; D004847:Epithelial Cells / Q000378:metabolism / Q000473:pathology / Q000502:physiology*; D005786:Gene Expression Regulation; D006801:Humans; D007413:Intestinal Mucosa / Q000166:cytology / Q000473:pathology / Q000502:physiology*; D008564:Membrane Potentials; D011073:Polyamines / Q000378:metabolism*; D015221:Potassium Channels / Q000502:physiology*; D015398:Signal Transduction; D014945:Wound Healing / Q000502:physiology
D011073:Polyamines; D015221:Potassium Channels