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Cell proliferation in the gastric epithelium of the ulcer rat.

Artikel i vetenskaplig tidskrift
Författare Herbert F Helander
H Li
Publicerad i Scandinavian journal of gastroenterology
Volym 40
Nummer/häfte 12
Sidor 1386-93
ISSN 0036-5521
Publiceringsår 2005
Publicerad vid Institutionen för de kirurgiska disciplinerna, Avdelningen för gastroforskning
Sidor 1386-93
Språk en
Länkar dx.doi.org/10.1080/0036552051002383...
Ämnesord Acetic Acid, Animals, Anti-Inflammatory Agents, Non-Steroidal, pharmacology, Cell Proliferation, drug effects, Epithelial Cells, drug effects, physiology, Female, Gastric Mucosa, drug effects, pathology, physiopathology, Gastrins, physiology, Helicobacter Infections, complications, Indomethacin, pharmacology, Rats, Rats, Sprague-Dawley, Stomach Ulcer, chemically induced, pathology, physiopathology, Thymidine, analogs & derivatives, pharmacology, Wound Healing, drug effects, physiology
Ämneskategorier Medicin och Hälsovetenskap

Sammanfattning

OBJECTIVE: Cell division is brisk in the ulcer margin and many of the new cells will migrate over and cover the ulcer bed. The aim of this study was to determine how agents that promote or delay gastric ulcer healing influence cell proliferation in the gastric epithelium. MATERIAL AND METHODS: Acetic acid ulcers were produced in the rat gastric corpus; non-ulcer rats served as controls. All rats were given a continuous infusion of (3)H-thymidine. Some rats were also given gastrin or indomethacin, or infected with Helicobacter pylori. The rats were killed after 1, 2, 6 or 13 days, and the ulcer margin and undamaged corpus were excised for determination of labeling index (LI) by autoradiography. Antrum, duodenum and colon were also studied. Silver grain counting was carried out in some groups. RESULTS: LI in the ulcer margin grew exponentially, reaching 84% after 6 days; gastrin increased, and indomethacin decreased LI significantly. In 6-day ulcer rats that were given 3H-thymidine only during the first day LI was 5%, while in those given 3H-thymidine only during the last day LI was 27%. LI and silver grain counting results indicated that during the first 6 days of healing the epithelial cells in the ulcer margin divide twice. In the undamaged epithelium of the 1-day ulcer rats LI was

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