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The impact of type 2 diabetes and antidiabetic drugs on cancer cell growth

Yin-Hsun Feng1, Guermarie Velazquez-Torres, Christopher Gully

  • 1Department of Oncology, Chi-Mei Medical Center, Tainan, Republic of China.

Journal of Cellular and Molecular Medicine
|May 12, 2010
PubMed

Insights

Metformin and rosiglitazone, used for type 2 diabetes, inhibit cancer cell growth and enhance chemotherapy effectiveness. Insulin and glucose, however, promote cancer progression and chemoresistance.

Area of Science:

  • Oncology
  • Endocrinology
  • Pharmacology

Background:

  • Type 2 diabetes and cancer share complex links, with varying survival rates observed in diabetic cancer patients on different antidiabetic medications.
  • A critical knowledge gap exists regarding the direct impact of antidiabetic pharmacotherapy on cancer progression.

Purpose of the Study:

  • To investigate the differential direct effects of various antidiabetic drugs on human cancer cell lines.
  • To determine if specific antidiabetic agents promote or inhibit cancer cell growth and chemoresistance.

Main Methods:

  • Utilized four human cancer cell lines: pancreatic (MiaPaCa2, Panc-1) and breast (MCF7, HER18).
  • Assessed the impact of insulin, glucose, metformin, rosiglitazone, and exenatide on cancer cell proliferation, apoptosis, and chemoresistance.
  • Investigated effects on key signaling pathways, including AKT/mTOR and AMP-activated protein kinase.

Main Results:

  • Insulin and glucose were found to promote cancer cell proliferation and chemoresistance.
  • Metformin and rosiglitazone demonstrated suppression of cancer cell growth and induction of apoptosis.
  • Metformin activated AMP-activated protein kinase, while rosiglitazone affected chromosome ten levels; both impacted the AKT/mTOR pathway.
  • Combinations of metformin or rosiglitazone with chemotherapy agents (gemcitabine, doxorubicin) further reduced live cancer cells and increased apoptosis.
  • Exenatide showed no direct effect on cancer cells.

Conclusions:

  • Different antidiabetic pharmacotherapies exert differential direct effects on cancer cells.
  • Metformin and rosiglitazone show potential as beneficial agents in type 2 diabetes management for cancer patients.
  • Further research is warranted to explore metformin and rosiglitazone as potential first-line therapies in this patient population.

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