Frederic G. Barr, M.D., Ph.D.

Senior Investigator

Laboratory of Pathology


Building 10 - Magnuson CC, Room 2S235D
Bethesda, MD 20892-1500


Research Topics

Dr. Barr's research interest is molecular genetics of cancer with a focus on recurrent chromosomal alterations in sarcomas. His research team has most recently been conducting a multidisciplinary approach to understand the biological consequences of these genetic events in rhabdomyosarcoma, a family of pediatric soft tissue cancers. Major focal points of this research program are fusions of the PAX3 or PAX7 gene with the FOXO1 (FKHR) gene to generate fusion oncoproteins, the amplification of several oncogenic loci, and genome-wide changes in DNA methylation. These studies revealed that the gene fusions result in an aberrant gene expression program that contributes to tumorigenesis. Amplification events involving known and new candidate oncogenes occur in specific gene fusion subsets and are associated with distinct clinical outcomes. Distinct DNA methylation patterns are associated with the fusion-positive and fusion-negative subtypes of rhabdomyosarcoma. Current studies are examining tumorigenic effects, functional domains, downstream targets, regulation of gene expression, and clinical applications.


Dr. Barr received his undergraduate education at Williams College, and then attended Washington University School of Medicine, where he obtained his M.D. and Ph.D. degrees. Subsequently, he received residency training in anatomic pathology at the Hospital of the University of Pennsylvania and performed postdoctoral research in the Division of Human Genetics and Molecular Biology at the Children's Hospital of Philadelphia. Before coming to the NIH, Dr. Barr was a faculty member in the Department of Pathology and Laboratory Medicine at the University of Pennsylvania School of Medicine. Dr. Barr was recruited to the NIH in 2011 as a Senior Investigator and Deputy Branch Chief in the Laboratory of Pathology, and was subsequently appointed Medical Director and Associate Residency Program Director. In addition to his research activities, Dr. Barr serves on the Steering Committee of the Soft Tissue Sarcoma Committee of the Children's Oncology Group, and recently completed a 7-year term as the Senior Associate Editor for the Journal of Molecular Diagnostics.

Selected Publications

  1. Sun W, Chatterjee B, Shern JF, Patidar R, Song Y, Wang Y, Walker RL, Pawel BR, Linardic CM, Houghton P, Hewitt SM, Edelman DC, Khan J, Meltzer PS, Barr FG. Relationship of DNA methylation to mutational changes and transcriptional organization in fusion-positive and fusion-negative rhabdomyosarcoma. Int J Cancer. 2019;144(11):2707-2717.
  2. Skapek SX, Ferrari A, Gupta AA, Lupo PJ, Butler E, Shipley J, Barr FG, Hawkins DS. Rhabdomyosarcoma. Nat Rev Dis Primers. 2019;5(1):1.
  3. Boudjadi S, Chatterjee B, Sun W, Vemu P, Barr FG. The expression and function of PAX3 in development and disease. Gene. 2018;666:145-157.
  4. Pandey PR, Chatterjee B, Olanich ME, Khan J, Miettinen MM, Hewitt SM, Barr FG. PAX3-FOXO1 is essential for tumour initiation and maintenance but not recurrence in a human myoblast model of rhabdomyosarcoma. J Pathol. 2017;241(5):626-637.
  5. Olanich ME, Sun W, Hewitt SM, Abdullaev Z, Pack SD, Barr FG. CDK4 Amplification Reduces Sensitivity to CDK4/6 Inhibition in Fusion-Positive Rhabdomyosarcoma. Clin Cancer Res. 2015;21(21):4947-59.

Related Scientific Focus Areas

This page was last updated on Tuesday, August 15, 2023