Sandra Sexton.

Sandra Sexton

Associate professor of oncology
Roswell Park Comprehensive Cancer Center

Sandra Sexton is associate professor of oncology and facility director and attending veterinarian at the Comparative Oncology Shared Resource (COSR) at the Roswell Park Comprehensive Cancer Center. She earned a doctorate in veterinary medicine in 1991 from the University of Agricultural Sciences in Bogotá, Colombia. After working in private practice and then relocating to the United States, she obtained a degree certification in veterinary medicine and surgery and completed a postdoctoral residency in laboratory animal medicine from the Division of Comparative Medicine at Buffalo State University.

Sexton joined the Roswell Park Comprehensive Cancer Center in 2003 as a research affiliate and postdoctoral veterinary resident, where she was appointed institute veterinarian of the Laboratory Animal Shared Resource (LASR) and promoted to facility director and attending veterinarian in 2006. She was board certified as a diplomate of the American College of Laboratory Animal Medicine in 2013. As COSR director and attending veterinarian, she provides support to scientists across the Cancer Center Support Grants with diverse experimental objectives, as well as operational leadership at the LASR, which provides facilities, personnel and equipment to assure compliance with all regulatory requirements and maintain AAALAC international accreditation.

Explore more from The Transmitter

Genetic profiles separate early, late autism diagnoses

Age at diagnosis reflects underlying differences in common genetic variants and developmental trajectories among people with autism.

By Natalia Mesa
27 November 2025 | 5 min read

To persist, memories surf molecular waves from thalamus to cortex

During the later stages of learning, the mouse brain progressively activates transcriptional regulators that drive memory consolidation.

By Claudia López Lloreda
26 November 2025 | 4 min read

Sex hormone boosts female rats’ sensitivity to unexpected rewards

During the high-estradiol stages of their estrus cycle, female rats learn faster than they do during other stages—and than male rats overall—thanks to a boost in their dopaminergic response to reward, a new study suggests.

By Angie Voyles Askham
26 November 2025 | 5 min read

privacy consent banner

Privacy Preference

We use cookies to provide you with the best online experience. By clicking “Accept All,” you help us understand how our site is used and enhance its performance. You can change your choice at any time. To learn more, please visit our Privacy Policy.