The effect of chloroquine administration on two experimental models of acute pancreatitis

Markus M. Lerch, Ashok Saluja, Rajinder Dawra, Manju Saluja, Michael L. Steer

Research output: Contribution to journalArticle

74 Citations (Scopus)

Abstract

Background: Recent experimental findings have suggested that activation of trypsinogen by cathepsin B within acidic pancreatic acinar cell cytoplasmic vacuoles may be a critical early event in both secretagogue and diet-induced pancreatitis. The weak base chloroquine accumulates within acidic intracellular compartments, raises their pH, and can inhibit proteolysis as well as cathepsin B. Methods: We have investigated the effect of in vivo chloroquine administration on both secretagogue and diet-induced experimental pancreatitis to determine if raising the pH of cytoplasmic vacuoles in these models of pancreatitis would have a protective effect. Results: Infusion of chloroquine (5 mg · kg-1 · h-1) resulted in the uptake and concentration of chloroquine in the pancreas, an increase in the pH of acinar cell acidic compartments, and interference with the pH-dependent sorting of lysosomal hydrolases from digestive enzyme zymogens. However, chloroquine administration did not have a protective effect against the hyperamylasemia, the pancreatic edema, the morphological changes or the mortality that is associated with these models of pancreatitis. Conclusions: These observations lead us to conclude that raising the pH of acinar cell acidic compartments by in vivo administration of chloroquine does not prevent either secretagogue or diet-induced pancreatitis.

Original languageEnglish (US)
Pages (from-to)1768-1779
Number of pages12
JournalGastroenterology
Volume104
Issue number6
DOIs
StatePublished - Jan 1 1993
Externally publishedYes

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Chloroquine
Pancreatitis
Theoretical Models
Acinar Cells
Cathepsin B
Diet
Vacuoles
Hyperamylasemia
Trypsinogen
Enzyme Precursors
Hydrolases
Proteolysis
Pancreas
Edema
Mortality
Enzymes

ASJC Scopus subject areas

  • Gastroenterology

Cite this

The effect of chloroquine administration on two experimental models of acute pancreatitis. / Lerch, Markus M.; Saluja, Ashok; Dawra, Rajinder; Saluja, Manju; Steer, Michael L.

In: Gastroenterology, Vol. 104, No. 6, 01.01.1993, p. 1768-1779.

Research output: Contribution to journalArticle

Lerch, Markus M. ; Saluja, Ashok ; Dawra, Rajinder ; Saluja, Manju ; Steer, Michael L. / The effect of chloroquine administration on two experimental models of acute pancreatitis. In: Gastroenterology. 1993 ; Vol. 104, No. 6. pp. 1768-1779.
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