John Franklin Rawls

John Franklin Rawls

Professor of Molecular Genetics and Microbiology

We seek to understand how the intestinal microbiome contributes to vertebrate physiology and disease. To that end, we leverage complementary zebrafish and mouse models to study the integrative physiology of host-microbiome interactions. This work has identified novel and conserved mechanisms by which intestinal bacteria regulate dietary fat metabolism and systemic innate immunity. We also apply genomic approaches in these animal models to understand the transcriptional regulatory pathways utilized by the intestinal epithelium to mediate host responses to the microbiome. Using this approach, we have identified mechanisms of transcriptional and chromatin regulation that have been conserved during vertebrate evolution and also contribute to modern human diseases such as the inflammatory bowel diseases, obesity, and diabetes. To further advance our understanding of obesity pathophysiology, we developed the zebrafish as a model system for studying adipose tissues and identifying new environmental and genetic regulators of adiposity. We are also engaged in translational research in humans and animal models to define microbial and metabolic determinants of obesity and efficacy of weight loss intervention. Grounded in comparative and integrative physiology, our research program has been effective in discovering ancient mechanisms of host-microbiome interaction that are conserved across animal taxa and contribute to the etiology of modern human diseases. These insights are advancing our understanding of host-microbiome relationships in vertebrate physiology and identifying novel therapeutic targets for human diseases ranging from inflammatory bowel disease to obesity to neurological disorders.

Appointments and Affiliations

  • Professor of Molecular Genetics and Microbiology
  • Professor in Medicine
  • Professor of Cell Biology
  • Member of the Duke Cancer Institute

Contact Information

  • Office Location: 323A CARL Building Box 3580, 213 Research Drive, Durham, NC 27710
  • Office Phone: (919) 613-7212
  • Email Address:
  • Websites:


  • Ph.D. Washington University in St. Louis, 2001
  • B.S. Emory University, 1996

Awards, Honors, and Distinctions

  • Fellow. American Academy of Microbiology. 2021
  • Fellow. American Association for the Advancement of Science. 2016
  • Kavli Fellow. Kavli Frontiers of Science Program. 2009
  • Pew Scholar in the Biomedical Sciences. Pew Charitable Trust. 2008
  • Mentored Research Scientist Development Award. National Institutes of Health. 2006
  • Ruth L. Kirschstein Individual National Research Service Award. National Institutes of Health. 2002
  • Spencer T. and Ann W. Olin Medical Scientist Fellow. Washington University School of Medicine. 2001
  • Victor Hamburger Prize in Developmental Biology. Washington University School of Medicine. 2001

Courses Taught

  • MGM 593: Research Independent Study
  • NEUROSCI 391: Neuroscience Independent Scholarship 1: Advanced Topics
  • UPGEN 778E: University Program in Genetics and Genomics Biological Solutions Module V

In the News

Representative Publications

  • Heppert, JK; Lickwar, CR; Tillman, MC; Davis, BR; Davison, JM; Lu, H-Y; Chen, W; Busch-Nentwich, EM; Corcoran, DL; Rawls, JF, Conserved roles for Hnf4 family transcription factors in zebrafish development and intestinal function., Genetics, vol 222 no. 4 (2022) [10.1093/genetics/iyac133] [abs].
  • Tong, W; Hannou, SA; Wang, Y; Astapova, I; Sargsyan, A; Monn, R; Thiriveedi, V; Li, D; McCann, JR; Rawls, JF; Roper, J; Zhang, G-F; Herman, MA, The intestine is a major contributor to circulating succinate in mice., Faseb Journal : Official Publication of the Federation of American Societies for Experimental Biology, vol 36 no. 10 (2022) [10.1096/fj.202200135RR] [abs].
  • Hurst, JH; McCumber, AW; Aquino, JN; Rodriguez, J; Heston, SM; Lugo, DJ; Rotta, AT; Turner, NA; Pfeiffer, TS; Gurley, TC; Moody, MA; Denny, TN; Rawls, JF; Clark, JS; Woods, CW; Kelly, MS, Age-Related Changes in the Nasopharyngeal Microbiome Are Associated With Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Infection and Symptoms Among Children, Adolescents, and Young Adults., Clinical Infectious Diseases : an Official Publication of the Infectious Diseases Society of America, vol 75 no. 1 (2022), pp. e928-e937 [10.1093/cid/ciac184] [abs].
  • Levraud, J-P; Rawls, JF; Clatworthy, AE, Using zebrafish to understand reciprocal interactions between the nervous and immune systems and the microbial world., Journal of Neuroinflammation, vol 19 no. 1 (2022) [10.1186/s12974-022-02506-x] [abs].
  • Suarez, L; Skinner, AC; Truong, T; McCann, JR; Rawls, JF; Seed, PC; Armstrong, SC, Advanced Obesity Treatment Selection among Adolescents in a Pediatric Weight Management Program., Child Obes, vol 18 no. 4 (2022), pp. 237-245 [10.1089/chi.2021.0190] [abs].