Organophosphate sensitizes the human pancreas to acinar cell injury: an ultrastructural study.
Viable pancreas fragments from five human donors were incubated in oxygenated buffered Eagle Medium. The preparation and incubation conditions were based on the method of Scheele and Palade. In Group 1 there was 1-h preincubation with echothiophate (10(-4) M); then, acetylcholine (10(-5) M) was added. After 2 h tissues were prepared for electron microscopy. Acinar injury with vacuole formation was apparent. Many of these changes were observed in fragments incubated only with acetylcholine (10(-5) M) (Group 2) and in incubates with echothiophate only (10(-4) M) (Group 3); only minor changes were seen in controls with Eagle's Medium (Group 4). Large vacuoles were significantly more numerous in Group 1 than in Control Group 4 (p < 0.05). Zymogen granules were depleted in Groups 1, 2, and 3. This depletion was significant in Group 1 when compared with Group 4 (p < 0.02). These results extend previous in vitro results that showed increased amylase release after echothiophate treatment in human pancreas and a left shift in response to acetylcholine.
Goodale
R L
RL
Department of Surgery, University of Minnesota School of Medicine, Minneapolis.
Manivel
J C
JC
Borner
J W
JW
Liu
S
S
Judge
J
J
Li
C
C
Tanaka
T
T
D000109:Acetylcholine / Q000633:toxicity; D000208:Acute Disease; D004456:Echothiophate Iodide / Q000633:toxicity*; D006801:Humans; D066298:In Vitro Techniques; D008854:Microscopy, Electron; D010179:Pancreas / Q000648:ultrastructure; D010195:Pancreatitis / Q000139:chemically induced* / Q000473:pathology
D004456:Echothiophate Iodide; D000109:Acetylcholine