Pancreatic gene expression during the initiation of acute pancreatitis: Identification of EGR-1 as a key regulator

Baoan Ji, Xue Qing Chen, David E. Misek, Rork Kuick, Samir Hanash, Steve Ernst, Rebecca Najarian, Craig D. Logsdon

Research output: Contribution to journalArticle

96 Scopus citations

Abstract

We hypothesized that genes expressed in pancreatic acinar cells during the initiation of acute pancreatitis determine the severity of the disease. Therefore, we utilized microarrays to identify those genes commonly induced in rat pancreatic acinar cells within 1-4 h in two in vivo models, caerulein and taurocholate administration. This strategy yielded 51 known genes representing a complex array of molecules, including those that are likely to either reduce or increase the severity of the disease. Novel genes identified in the current study included ATF3, BRF1, C/EBPβ, CGRP, EGR-1, ephrinal, villin2, ferredoxin, latexin, lipocalin, MKP-1, NGFI-B, RhoA, tissue factor (TF), and syndecan. To validate these microarray results, the role of EGR-1 was further investigated using quantitative RT-PCR, Western blotting, and immunocytochemistry. EGR-1 expression occurred within acinar cells and correlated with the development of caerulein-induced acute pancreatitis in rats. Furthermore, the levels of the inflammation-related genes MCP-1, PAI, TF, IL-6, and ICAM-1 and the extent of lung inflammation were reduced during the initiation of caerulein-induced acute pancreatitis in EGR-1-deficient mice. Thus this study identified EGR-1 and several other novel genes likely to be important in the development and severity of acute pancreatitis.

Original languageEnglish (US)
Pages (from-to)59-72
Number of pages14
JournalPhysiological Genomics
Volume14
DOIs
StatePublished - Oct 2003

Keywords

  • Acute respiratory distress syndrome
  • Inflammation
  • Pancreas
  • Pancreatic acinar cell
  • Real-time quantitative reverse transcription-polymerase chain reaction

ASJC Scopus subject areas

  • Physiology
  • Genetics

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