Martin McMahon

Martin McMahon is a Scottish cancer biologist, working in the USA since 1985, known for his work on conditional oncoproteins and RAS-regulated signaling pathways mediated by RAF protein kinases and PI3'-lipid kinases. His research has significantly contributed to understanding the molecular basis of melanoma, lung, and thyroid cancers, particularly mechanisms of tumor initiation, progression and drug sensitivity/resistance. He holds the Cumming–Presidential Chair of Cancer Biology in the University of Utah, Dept. of Dermatology, and serves as Senior Director for Preclinical Translation at Huntsman Cancer Institute.

Early life and education McMahon was born and raised in Glasgow, Scotland. He attended St. Conval's primary school, Holyrood secondary school, and then earned a B.Sc. (Hons) in Biochemistry from the University of Glasgow in 1981. He was awarded a Ph.D. from King’s College, University of London in 1985 for research conducted at the Imperial Cancer Research Fund and at Stanford University. His doctoral research, mentored by Dr. Ian M. Kerr and Dr. George R. Stark, focused on mechanisms of interferon signaling. In 1991, he joined the DNAX Research Institute in Palo Alto, where he led a research group investigating the oncogenic activities of RAF family protein kinases using novel conditional oncoprotein kinases that he engineered as a postdoctoral fellow.

In 1998, McMahon returned to UCSF joining the faculty of the Helen Diller Family Comprehensive Cancer Center (led by Dr. Frank McCormick) and being appointed as the Efim Guzik Distinguished Professor of Cancer Biology (2001) and Co‑Leader of the Experimental Therapeutics Program (2011).

In 2015, he was recruited by Dr. John Zone and Dr. Mary Beckerle to the faculty of the Dept. of Dermatology of the University of Utah School of Medicine and to Huntsman Cancer Institute.

A significant contribution is the development of conditional BRAFV600E, which have been instrumental in studying RAF→MEK→ERK MAPK pathway activation and the development of pathway-targeted therapies. His group demonstrated that inhibiting the RAF→MEK→ERK pathway can induce cytoprotective autophagy in RAS-driven cancers, suggesting that combining pathway inhibitors with autophagy inhibitors could be a therapeutic strategy. This work has led to clinical trials investigating combination therapies. More recently, his work has focussed on targeting RAS oncoproteins in melanoma.

Other notable findings include defining the cooperative interactions between BRAFV600E, KRAS, and PTEN loss in melanoma progression using mouse models and investigating mechanisms of resistance to targeted therapies in melanoma and lung cancer. His laboratory has also contributed to understanding the role of the tumor microenvironment and genetic context in shaping therapeutic responses.

Awards and honors At UCSF, McMahon served as the Efim Guzik Distinguished Professor of Cancer Biology from 2001-2015. He is currently appointed at the University of Utah as the Cumming-Presidential Chair of Cancer Biology in the Dept. of Dermatology. McMahon was the 1981 recipient of the J.N. Davidson Memorial Prize in Biochemistry from the University of Glasgow. In 2006 he was the recipient of the Diana Ashby Senior Investigator Award from the Melanoma Research Foundation, which supported his early work on genetically engineered mouse models of melanoma.

Selected publications

Media and interviews McMahon has been featured in media discussing his research and career path. He was interviewed in the "Talks with Docs" series by the Huntsman Cancer Institute in April 2025, where he discussed his background and research philosophy. He has also been interviewed regarding specific research findings, such as the synergy between MAPK inhibitors and autophagy inhibition in RAS-driven cancers.