Dynamics of pancreatic tissue cells in the rat exposed to long-term caerulein treatment: 1. Biochemical, morphological and morphometrical evaluations.

Abstract:

:This study was undertaken to evaluate whether hypertrophy and hyperplasia of the pancreatic acinar cells induced by caerulein remained after termination of the hormonal treatment. Rats received subcutaneous injections of saline or caerulein for 4 days and were killed immediately after termination of treatment or 2, 15 and 50 days later. Caerulein treatment induced significant increases in pancreatic weight and contents of DNA, RNA, protein, amylase and chymotrypsinogen along with an increased number of acinar cells per acinus and zymogen granules per acinar cells. During the post-treatment period, the caerulein-treated pancreas reverted to control values for their contents in proteins, enzymes and RNA and number of zymogen granules per acinar cell while the number of pancreatic cells remained constant as indicated by the absence of modification in total DNA content and acinar cells per acinus. During that same period, saline-treated pancreas exhibited constant growth. These morphological and biochemical data indicate that the already present and newly formed acinar cells can remain in place once the trophic stimulus is withdrawn and that they can adjust their cellular components and thus their digestive capacity to the circulating levels of endogenous cholecystokinin released in response to normal meals.

journal_name

Biol Cell

journal_title

Biology of the cell

authors

Morisset J,Grondin G

subject

Has Abstract

pub_date

1989-01-01 00:00:00

pages

271-8

issue

3

eissn

0248-4900

issn

1768-322X

pii

0248-4900(89)90180-9

journal_volume

66

pub_type

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