Digestive Diseases and Sciences

, Volume 41, Issue 4, pp 773–784

Overexpression of transforming growth factor-α alters differentiation of gastric cell lineages

  • James R. Goldenring
  • Gregory S. Ray
  • Carol J. Soroka
  • Jenetta Smith
  • Irvin M. Modlin
  • Katherine S. Meise
  • Robert J. CoffeyJr.
Esophageal, Gastric, and Duodenal Disorders

Abstract

Overexpression of transforming growth factor-α (TGF-α) in the gastric fundic mucosa of metallothionein promoter/enhancer-TGF-α(MT-TGF-α) transgenic mice produces a phenotype of foveolar hyperplasia similar to that observed in Ménétrier's disease. We have investigated the dynamics involved in the alterations of gastric mucosal morphology in the MT-TGF-α mouse model. The fundic mucosa of MT-TGF-α mice and nontransgenic littermates was evaluated in animals treated with cadmium sulfate. To mark the mucosal proliferative zone, 8-bromodeoxyuridine (BrdU) was administered 2 hr prior to killing. Gastric mucosa was examined by diastase-resistant, periodic acid-Schiff-positive (DR-PAS) staining and immunohistochemistry for H/K-ATPase and BrdU. MT-TGF-α mice demonstrated increased numbers of DR-PAS-staining mucous cells and lower parietal cell numbers per gland unit. While the proliferative zone in nontransgenic mice was located in the upper half of the gland, the zone in MT-TGF-α mice was located in the basal region. Overexpression of TGF-α in MT-TGF-α mice leads to an alteration in the development of mucosal lineages from the fundic progenitor zone, which is biased towards the predominant differentiation of foveolar mucous cells.

Key Words

partietal cells growth factors gastric lineages transforming growth factor-α gastrin transgenic mice 

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Copyright information

© Plenum Publishing Corporation 1996

Authors and Affiliations

  • James R. Goldenring
    • 1
    • 2
    • 3
  • Gregory S. Ray
    • 1
    • 2
    • 3
  • Carol J. Soroka
    • 1
    • 2
    • 3
  • Jenetta Smith
    • 1
    • 2
    • 3
  • Irvin M. Modlin
    • 1
    • 2
    • 3
  • Katherine S. Meise
    • 1
    • 2
    • 3
  • Robert J. CoffeyJr.
    • 1
    • 2
    • 3
  1. 1.Institute for Molecular Medicine and GeneticsMedical College of Georgia and the Augusta VA Medical CenterAugust
  2. 2.Gastrointestinal Pathobiology Research GroupYale University School of Medicine and the West Haven VA Medical CenterNew Haven
  3. 3.Departments of Medicine and Cell BiologyVanderbilt University, and the Nashville VA Medical CenterNashville

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