Exendin-4 does not modify growth or apoptosis of human colon cancer cells

He Wenjing1,2, Yu Shuang1, Li Weisong3

  • 1a Department of Endocrinology , The First Affiliated Hospital of Sun Yat-sen University , Guangzhou , China.

Endocrine Research
|March 21, 2017
PubMed
Abstract

Insights

Glucagon-like peptide-1 (GLP-1) receptor agonists do not affect colon cancer cell growth or survival. These findings suggest GLP-1 receptor agonists may be safe for diabetic patients with colon cancer.

Area of Science:

  • Oncology
  • Endocrinology
  • Pharmacology

Background:

  • Glucagon-like peptide-1 (GLP-1) receptor agonists are widely used antidiabetes medications.
  • These drugs activate signaling pathways (PI3K, ERK1/2) that can also promote cancer cell growth.
  • The potential impact of GLP-1 receptor agonists on colon cancer warrants investigation due to these shared pathways.

Purpose of the Study:

  • To determine if GLP-1 receptor agonists influence the growth and survival of human colon cancer cells.
  • To investigate the expression of the GLP-1 receptor in colon cancer tissues and cell lines.

Main Methods:

  • Immunohistochemistry was used to assess GLP-1 receptor expression in human colon cancer samples.
  • Exendin-4, a GLP-1 receptor agonist, was tested on colon cancer cell lines in vitro for effects on proliferation, migration, and apoptosis.
  • The in vivo effects of exendin-4 on colon cancer cell propagation were evaluated.

Main Results:

  • No expression of the GLP-1 receptor was detected in human colon cancer tissues or cell lines.
  • Exendin-4 did not enhance the proliferation or migration of colon cancer cells in vitro.
  • Exendin-4 did not protect colon cancer cells from apoptosis induced by chemotherapy agents (5-FU, irinotecan) and did not promote tumor growth in vivo.

Conclusions:

  • GLP-1 receptor agonists do not appear to influence the growth or survival of human colon cancer cells.
  • These findings suggest that GLP-1 receptor agonists could be safely used in diabetic patients diagnosed with colon cancer.