James Bayrer, MD, PhD

Title(s)Associate Professor, Pediatrics
SchoolSchool of Medicine
Address1550 Fourth St, #549
San Francisco CA 94158
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    Collapse Biography 
    Collapse Education and Training
    Case Western Reserve UniversityM.D.2007School of Medicine
    Case Western Reserve UniversityPh.D.2005Pharmacology
    Collapse Awards and Honors
    NASPGHAN 2015Young Faculty Investigator Research Award
    Kenneth Rainin Foundation Innovations Symposium2015Poster Award
    ACG-CCFA IBD Circle Spotlight2015Best of DDW
    American Gastroenterological Association, DDW2015Poster of Distinction
    American Gastroenterological Association, DDW2014Poster of Distinction
    NASPGHAN 2008Teaching and Tomorrow Travel Award
    Lepow Research Day, CWRU2005Outstanding Poster Presentation Award
    ShowCase, CWRU2004Sigma Xi Award for Poster Presentation
    Graduate Student Symposium, CWRU2003President's Award for Outstanding Poster Presentation
    Claremont McKenna College1998Honors in Chemistry
    Claremont McKenna College1998Honors in Literature
    Claremont McKenna College1998Magna cum Laude
    Joint Science Program, Claremont McKenna College1998Top Thesis in the Sciences

    Collapse Overview 
    Collapse Overview
    As a pediatric gastroenterologist and physician scientist, I am keenly aware of the challenges faced by our pediatric population. The intestinal epithelium comprises the human body’s greatest environmentally exposed surface and is the largest sensory and endocrine organ. My research utilizes human intestinal organoids and animal models to understand how the intestine senses and responds to both regular and inflammatory stimuli. By investigating the molecular pathways involved, we aim to discover new ways to promote intestinal wound healing and modulate the signals contributing to visceral pain syndromes.

    Collapse Research 
    Collapse Research Activities and Funding
    Decoding LRH-1 Activity in Gut Regeneration and Differentiation
    NIH R01DK128346Jun 14, 2021 - Apr 30, 2026
    Role: Principal Investigator
    Uncovering the role of LRH-1 in enteroendocrine cell development and ?gut-brain? communication
    NIH R03DK121061Apr 25, 2019 - Mar 31, 2021
    Role: Principal Investigator
    Targeting Intestinal Epithelium to Promote Healing in Inflammatory Bowel Disease
    NIH K08DK106577Jul 18, 2016 - Jun 30, 2019
    Role: Principal Investigator
    Creating a Pediatric Inflammatory Bowel Disease Intestinal Organoid Biorepository for Personalized Therapeutic Discovery
    RAP Pilot Award for Junior Investigators B27552DJul 1, 2016 - Jun 30, 2017
    Role: Principal Investigator
    LRH-1: Structure-based Approach to Drug Design for Gastrointestinal Tumors
    NIH F32CA163092Apr 1, 2012 - Mar 31, 2015
    Role: Principal Investigator

    Collapse ORNG Applications 
    Collapse Featured Publications

    Collapse Bibliographic 
    Collapse Publications
    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Researchers can login to make corrections and additions, or contact us for help. to make corrections and additions.
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    Altmetrics Details PMC Citations indicate the number of times the publication was cited by articles in PubMed Central, and the Altmetric score represents citations in news articles and social media. (Note that publications are often cited in additional ways that are not shown here.) Fields are based on how the National Library of Medicine (NLM) classifies the publication's journal and might not represent the specific topic of the publication. Translation tags are based on the publication type and the MeSH terms NLM assigns to the publication. Some publications (especially newer ones and publications not in PubMed) might not yet be assigned Field or Translation tags.) Click a Field or Translation tag to filter the publications.
    1. Gut enterochromaffin cells drive visceral pain and anxiety. Nature. 2023 04; 616(7955):137-142. Bayrer JR, Castro J, Venkataraman A, Touhara KK, Rossen ND, Morrie RD, Maddern J, Hendry A, Braverman KN, Garcia-Caraballo S, Schober G, Brizuela M, Castro Navarro FM, Bueno-Silva C, Ingraham HA, Brierley SM, Julius D. PMID: 36949192; PMCID: PMC10827380.
      View in: PubMed   Mentions: 8     Fields:    Translation:HumansCells
    2. A thermogenic fat-epithelium cell axis regulates intestinal disease tolerance. Proc Natl Acad Sci U S A. 2020 12 15; 117(50):32029-32037. Man K, Bowman C, Braverman KN, Escalante V, Tian Y, Bisanz JE, Ganeshan K, Wang B, Patterson A, Bayrer JR, Turnbaugh PJ, Chawla A. PMID: 33257580; PMCID: PMC7749324.
      View in: PubMed   Mentions: 6     Fields:    Translation:HumansAnimalsCells
    3. SPARC - Mapping Gut-Spinal Cord Connections in Visceral Pain. The FASEB Journal. 2020 Apr 1; 34(S1):1-1. Morrie MR, Bayrer BJ, Brierley BS, Ingraham IH, Julius JD. .
      View in: Publisher Site   Mentions:
    4. Estrogen signaling in arcuate Kiss1 neurons suppresses a sex-dependent female circuit promoting dense strong bones. . 2019 Sep 12. CB CH, WC WK, L LW, JR JB, A AL, M MS, A AF, B BF, Z ZZ, MS MR, DK DN, RA RN, SM SC, HA HI. .
      View in: Publisher Site   Mentions:
    5. 948 – Nuclear Receptor Liver Receptor Homolog-1 Promotes Intestinal Notch Signaling and Enteroendocrine Cell Development. Gastroenterology. 2019 May 1; 156(6):s-202. Choksi CP, Ingraham IH, Bayrer BJ. .
      View in: Publisher Site   Mentions:
    6. Estrogen signaling in arcuate Kiss1 neurons suppresses a sex-dependent female circuit promoting dense strong bones. Nat Commun. 2019 01 11; 10(1):163. Herber CB, Krause WC, Wang L, Bayrer JR, Li A, Schmitz M, Fields A, Ford B, Zhang Z, Reid MS, Nomura DK, Nissenson RA, Correa SM, Ingraham HA. PMID: 30635563; PMCID: PMC6329772.
      View in: PubMed   Mentions: 35     Fields:    Translation:Animals
    7. Advances in Enteric Neurobiology: The "Brain" in the Gut in Health and Disease. J Neurosci. 2018 10 31; 38(44):9346-9354. Kulkarni S, Ganz J, Bayrer J, Becker L, Bogunovic M, Rao M. PMID: 30381426; PMCID: PMC6209840.
      View in: PubMed   Mentions: 35     Fields:    Translation:HumansAnimals
    8. LRH-1 mitigates intestinal inflammatory disease by maintaining epithelial homeostasis and cell survival. Nat Commun. 2018 10 10; 9(1):4055. Bayrer JR, Wang H, Nattiv R, Suzawa M, Escusa HS, Fletterick RJ, Klein OD, Moore DD, Ingraham HA. PMID: 30305617; PMCID: PMC6180039.
      View in: PubMed   Mentions: 40     Fields:    Translation:HumansAnimals
    9. 273 - Nuclear Receptor LRH-1 Mitigates Intestinal Inflammatory Disease by Promoting Stem Cell Survival and Directing Normal Epithelial Composition. Gastroenterology. 2018 May 1; 154(6):s-67. Bayrer BJ, Escusa EH, Kein KO, Ingraham IH. .
      View in: Publisher Site   Mentions:
    10. Enterochromaffin Cells Are Gut Chemosensors that Couple to Sensory Neural Pathways. Cell. 2017 Jun 29; 170(1):185-198.e16. Bellono NW, Bayrer JR, Leitch DB, Castro J, Zhang C, O'Donnell TA, Brierley SM, Ingraham HA, Julius D. PMID: 28648659; PMCID: PMC5839326.
      View in: PubMed   Mentions: 313     Fields:    Translation:HumansAnimalsCells
    11. Intestinal Organoids: New Frontiers in the Study of Intestinal Disease and Physiology. J Pediatr Gastroenterol Nutr. 2017 02; 64(2):180-185. Wallach TE, Bayrer JR. PMID: 27632431; PMCID: PMC5250540.
      View in: PubMed   Mentions: 23     Fields:    Translation:HumansAnimals
    12. Tu1824 Targeting Intestinal Stem Cells to Promote Healing in Inflammatory Bowel Disease. Gastroenterology. 2015 Apr 1; 148(4):s-911-s-912. Bayrer BJ, Fletterick FR, Ingraham IH. .
      View in: Publisher Site   Mentions:
    13. Silencing LRH-1 in colon cancer cell lines impairs proliferation and alters gene expression programs. Proc Natl Acad Sci U S A. 2015 Feb 24; 112(8):2467-72. Bayrer JR, Mukkamala S, Sablin EP, Webb P, Fletterick RJ. PMID: 25675535; PMCID: PMC4345603.
      View in: PubMed   Mentions: 30     Fields:    Translation:HumansCells
    14. Sa1803 Dissecting the Oncogenic Activity of the Nuclear Receptor LRH-1 in the Colon. Gastroenterology. 2014 May 1; 146(5):s-299. Bayrer BJ, Mukkamala MS, Sablin SE, Fletterick FR. .
      View in: Publisher Site   Mentions:
    15. Doublesex and the regulation of sexual dimorphism in Drosophila melanogaster: structure, function, and mutagenesis of a female-specific domain. J Biol Chem. 2008 Mar 14; 283(11):7280-92. Yang Y, Zhang W, Bayrer JR, Weiss MA. PMID: 18184648.
      View in: PubMed   Mentions: 14     Fields:    Translation:AnimalsCells
    16. Dimerization of doublesex is mediated by a cryptic ubiquitin-associated domain fold: implications for sex-specific gene regulation. J Biol Chem. 2005 Sep 23; 280(38):32989-96. Bayrer JR, Zhang W, Weiss MA. PMID: 16049008.
      View in: PubMed   Mentions: 22     Fields:    Translation:AnimalsCells
    17. Expression, crystallization and preliminary X-ray characterization of the Drosophila transcription factor Doublesex. Acta Crystallogr D Biol Crystallogr. 2004 Jul; 60(Pt 7):1328-30. Bayrer J, Wan Z, Li B, Weiss MA. PMID: 15213406.
      View in: PubMed   Mentions:    Fields:    Translation:AnimalsCells
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