John Barrett

Department Chair

John Barrett

Department Chair


Academic Appointment(s)

Medical College of Georgia
Department of Radiation Oncology

  • (706) 446-5355
  • (706) 721-7248
  • HK-120


  • MD, Medicine University of South Carolina -, 1985

  • Ph.D., Biology/Biological Sciences, General University of South Carolina -, 1981

  • BS, Biology/Biological Sciences, General Tulane University, 1976


  • Radiation Oncology ABR, 1995

  • DEA DEA, 2015

  • DEAL DEA, 2015

  • PHY GA Composite Medical Board, 1992

  • ABIM ABIM, 1988

Courses Taught Most Recent Academic Year

  • RONC 5008

    Rad Therapy Off-Campus Extn.
  • RONC 5006

    Radiation Therapy Extn.


Selected Recent Publications

  • Autophagy facilitates the progression of ERalpha-positive breast cancer cells to antiestrogen resistance., 2009
    Journal Article, Academic Journal
  • A role for macroautophagy in protection against 4-hydroxytamoxifen-induced cell death and the development of antiestrogen resistance., 2008
    Journal Article, Academic Journal
  • Quantification of ionizing radiation-induced cell death in situ in a vertebrate embryo., 2007
    Journal Article, Academic Journal
  • Mifepristone induces growth arrest, caspase activation, and apoptosis of estrogen receptor-expressing, antiestrogen-resistant breast cancer cells., 2004
    Journal Article, Academic Journal
  • Induction of antiproliferation and apoptosis in estrogen receptor negative MDA-231 human breast cancer cells by mifepristone and 4-hydroxytamoxifen combination therapy: a role for TGFbeta1., 2003
    Journal Article, Academic Journal

Research Interests

Participation in translational and national cooperative group trials.