Robert Braun, PhD

Professor of Medicine



BA, Chemistry & Mathematics, University of Colorado, Boulder
PhD, Microbiology, Sackler School, Tufts University
Postdoctoral Training, University of Washington, Seattle


Campus: The Jackson Laboratory, Bar Harbor, ME
Office: ERB 2534
Laboratory: ERB 2065

Contact Information

Office Phone: 207-288-6841
Lab Phone: 207-288-6855
E-mail   Send an e-mail

Graduate Programs



Research Synopsis

My lab is driven by a passion to understand the cell biological basis of gamete (sperm and egg) development. We study how germline stem cells balance self-renewal with differentiation. Stem cell self-renewal at the expense of differentiation can cause germ cell tumors while differentiation at the expense of self-renewal can cause sterility. Our long-term goal is to understand the mechanisms that regulate germline stem cell fate. In other work, we are studying the molecular function of the hormone testosterone in spermatogenesis with a focus on how the tight junctions between Sertoli cells are regulated by testosterone. Lastly, we are investigating molecular mechanisms of translational regulation, a major form of gene regulation in both male and female germ cells, during spermatogenesis.

Apply to the Sackler School


The priority application deadlines are as follows:

December 1: Basic Science Division PhD Programs

February 15: Building Diversity in Biomedical Sciences

March 31: Post-Baccalaureate Research Program

May 1: Clinical & Translational Science, MS in Pharmacology & Drug Development

June 15: Online Certificate in Fundamentals of Clinical Care Research