[Pancreatic hormone amylin and integrity of the gastric mucosa].
The paper presents experimental findings of some possible mechanisms of protective antiulcerous action of amyline. Amyline is the second beta-cell pancreatic hormone, which has been just recently discovered. The authors have studied the effects of amyline on gastric secretion, mast cell functions, mesenteric lymphatic microvascular contractility, i.e. on individual aggressive and protective factors of the gastric mucosa. Amyline has been found to inhibit basal acid gastric secretion and the secretion stimulated by vagal irritation. The peptide reduces the secretory activities of mast cells. Amyline given to animals increases the heparin saturation index of mast cells and decreases the degranulation index. Amyline-induced stabilization of mast cells appears to followed by the decreased release of histamine and other damaging substances. The stimulating effect of amyline on the contractile activity of mesenteric lymphatic vessels was recorded in rats. Amyline increases both the frequency and amplitude of their contractions. The increased lymph flow that is closely associated with microcirculation promotes the maintenance of tissue homeostasis. Therefore, the protective antiulcerous properties of amyline reduce the action of aggressive agents on the gastric mucosa and stimulate protective ones.
German
S V
SV
Zhuĭkova
S E
SE
Komarov
F I
FI
Kopylova
G N
GN
Kuper
G J
GJ
Luk'iantseva
G V
GV
Samonina
G E
GE
Smirnova
E A
EA
Umarova
B A
BA
D000682:Amyloid / Q000502:physiology*; D000818:Animals; D015550:Cell Degranulation / Q000502:physiology; D005750:Gastric Juice / Q000378:metabolism*; D005753:Gastric Mucosa / Q000378:metabolism / Q000502:physiology*; D006636:Histamine Release / Q000502:physiology; D058228:Islet Amyloid Polypeptide; D008297:Male; D008407:Mast Cells / Q000502:physiology; D051381:Rats
D000682:Amyloid; D058228:Islet Amyloid Polypeptide