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ECL cells: biology and pathobiology

R Håkanson1, D Chen, Y Tielemans

  • 1Department of Pharmacology, University of Lund, Sweden.

Digestion
|January 1, 1994
PubMed
Summary
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Gastrin stimulates enterochromaffin-like (ECL) cells in the stomach, causing temporary reductions in histamine and pancreastatin, followed by adaptive increases in histidine decarboxylase (HDC) and cell size with prolonged exposure.

Area of Science:

  • Gastroenterology
  • Endocrinology
  • Cell Biology

Background:

  • Enterochromaffin-like (ECL) cells are key endocrine cells in the stomach's acid-producing region.
  • ECL cell tumors observed in rodents treated with acid secretion blockers raise safety concerns for long-term drug use.

Purpose of the Study:

  • To investigate the dynamic responses of ECL cells to gastrin stimulation.
  • To understand the cellular and molecular adaptations of ECL cells under sustained gastrin exposure.

Main Methods:

  • Gastrin infusion (intravenous and subcutaneous) in animal models.
  • Measurement of ECL cell secretory products (histamine, pancreastatin), cell size, cytoplasmic vesicles, histidine decarboxylase (HDC) activity, and HDC mRNA levels.

Main Results:

Related Experiment Videos

  • Acute gastrin infusion caused rapid depletion of histamine and pancreastatin, with subsequent normalization within hours.
  • Prolonged gastrin exposure led to increased histidine decarboxylase (HDC) activity and mRNA levels.
  • Sustained gastrin stimulation resulted in ECL cell hypertrophy, hyperplasia, and an increase in cytoplasmic vesicles over days to weeks.

Conclusions:

  • ECL cells exhibit complex adaptive responses to gastrin, involving both rapid secretory adjustments and slower structural and enzymatic changes.
  • These findings are crucial for evaluating the long-term safety of drugs affecting acid secretion and gastrin signaling.