George S. Brush

George S. Brush, Ph.D.
Associate Professor
Associate Director, Cancer Biology Graduate Program
421 E. Canfield Street, Suite 3122
Detroit, MI 48201

Mentoring: Layne Weatherford  (Graduated 08/29/2017)

Research Interests:

  • DNA damage and recombination checkpoints
  • Regulation of pre-meiotic DNA replication
  • Transcription mechanisms in early meiosis

Research Description:
Members of the ATM family of protein kinases are central regulators of the DNA damage response in eukaryotic cells, serving to directly and indirectly control downstream targets that mediate cell cycle delay, apoptosis, and DNA repair. A defect in any one of these three processes greatly increases the risk of cancer development. One of the main goals of our research program is to define the molecular mechanisms underlying the function of ATM and related enzymes such as ATR. Because the DNA damage response pathways have been highly conserved through evolution, we have elected to study the experimentally tractable budding yeast Saccharomyces cerevisiae. A principal homologue of ATM and ATR in yeast is Mec1, required for multiple checkpoint-associated cell cycle delay responses and certain types of DNA repair. We are employing both genetic and biochemical methods to further understand 1) how the Mec1 protein kinase is activated and; 2) the consequences of this activation. Our recent studies have explored the role of Mec1 during meiosis and have led to a new project aimed at defining the means by which a meiotic cell commits to DNA replication and prevents DNA re-replication. We anticipate that these studies will provide fundamental insight into mechanisms that preserve genomic integrity during gamete development.

Selected Publications:

Najor NA, Weatherford L, Brush GS. Prevention of DNA Rereplication Through a Meiotic Recombination Checkpoint Response. G3 (Bethesda). 2016;6:3869-81.

Brush GS. Evidence that histone H1 is dispensable for proper meiotic recombination in budding yeast. BMC Res Notes. 2015;8:275.

Education and Training
PhD (1992): Johns Hopkins University, Baltimore, Maryland

Cancer Biology Courses Taught:
CB7210 Fundamentals of Cancer Biology
CB7220 Molecular Biology of Cancer Development
CB7240 Principles of Cancer Therapy
CB7300 Special Topics F31 Grant Writing Course
CB7700 Recent Developments in Cancer Biology
CB7990 Research Technologies in Cancer Biology (Course Director)