photo of Brett McCray

Brett McCray, MD, PhD

Assistant Professor of Neurology
Hereditary Neuropathy

Understanding disease mechanisms to develop treatments for peripheral neuropathy

Dr. McCray's lab is focused on investigating forms of hereditary neuropathy, including Charcot-Marie-Tooth disease (CMT), which is the most common genetic neurological condition worldwide. He believes that a better understanding of how specific genetic mutations cause neuropathy will not only help to identify treatments for affected CMT patients but may also provide general insights regarding pathways that are important to nerve health. Such insights into fundamental aspects of nerve biology and health can then be applied across neurologic research. 

While there are over 100 genes that are connected with hereditary neuropathy, Dr. McCray focuses on TRPV4, which is the gene that causes CMT type 2C. It is unique because it is the only ion channel that is mutated in CMT, which makes this form of CMT potentially treatable with drugs that alter the activity of the channel. By studying how this channel causes nerve degeneration and the pathways it activates, Dr. McCray believes that we can develop a successful treatment for CMT2C and also identify ways in which TRPV4 drugs could be useful for other neurological diseases.

  • B.S., Duke University, 2002 graduated Magna cum laude
  • PhD, Neuroscience, University of Pennsylvania School of Medicine, 2009
  • MD, University of Pennsylvania School of Medicine, 2011
  • Intern, Internal Medicine, Brigham & Women’s Hospital, 2012
  • Resident, Neurology, Massachusetts General Hospital, 2015        
  • Fellow, Neuromuscular Medicine, Johns Hopkins Hospital, 2015-2016
  • Assistant Professor, Department of Neurology, Neuromuscular Division, Johns Hopkins University School of Medicine, 2016-2023
  • Co-Director, Charcot Marie Tooth Disease Center, The Johns Hopkins Hospital, 2020-2023
  • Training grant in Age-Related Neurodegenerative Diseases Appointee, 2006-2009
  • Dr. William F. Jeffers Prize for Meritorious Laboratory Research in Neurology, 2010
  • Alpha Omega Alpha medical honor society, 2010
  • American Academy of Neurology Student Prize for Excellence in Neurology, 2011
  • Competitive Fellowship Award, Inherited Neuropathies Consortium, 2016
  • Competitive Scholarship Award, American Academy of Neurology, 2018
  • Wolfe Research Prize for Identifying New Causes or Novel Treatment of Neuropathy, American Neurological Association, 2021

Top Publications

McCray BA, Diehl E, Sullivan JM, Aisenberg WH, Zaccor NW, Lau AR, Rich DJ, Goretzki B, Hellmich UA, Lloyd TE, Sumner CJ. Neuropathy-causing TRPV4 mutations disrupt TRPV4-RhoA interactions and impair neurite extension. Nat Commun. 2021 Mar 4;12(1)1444.

Taga A, Peyton MA, Goretzki B, Gallagher TQ, Ritter A, Harper A, Crawford TO, Hellmich UA, Sumner CJ, McCray BA. TRPV4 mutations causing mixed neuropathy and skeletal phenotypes result in severe gain of function. Ann Clin Transl Neurol. 2022 Feb 16.

Kwon DH, Zhang F, McCray BA, Feng S, Kumar M, Sullivan JM, Im W, Sumner CJ, Lee SY. TRPV4-Rho GTPase complex structures reveal mechanisms of gating and disease. Nat Commun. 2023 Jun 23;14(1):3732.

Woolums BM, McCray BA, Sung H, Tabuchi M, Sullivan JM, Ruppell KT, Yang Y, Mamah K, Aisenberg WH, Saveedra-Rivera PC, Larin BS, Lau AR, Robinson DN, Xiang Y, Wu MN, Sumner CJ, Lloyd TE. TRPV4 disrupts mitochondrial transport and causes axonal degeneration via a CaMKII-dependent elevation of intracellular Ca2+. Nat Commun. 2020:11(1):2679.

McCray BA, Scherer SS. Axonal Charcot-Marie-Tooth disease: from common pathogenic mechanisms to emerging treatment opportunities, Neurotherapeutics, 2021