The candidate is a gastroenterologist with strong training in patient-oriented research methodology, and a proven commitment to the study of esophageal diseases, and eosinophilic esophagitis (EoE) in particular. The candidate's long-term career goal is to be an independently funded physician-scientist in the area of esophageal diseases leading a multidisciplinary translational research team bridging the clinic, endoscopy suite, pathology lab, and basic science lab. The candidate's short-term career goals for the K23 program are to: 1) acquire knowledge and skills in translational research techniques;2) develop the professional skills to successfully lead a multidisciplinary research team;and 3) produce a critical mass of preliminary data and publications to support an R01 grant application and establish a program of independent research in EoE. The proposed research plan, career development activities, mentorship team, and institutional environment are all uniquely suited to assist the applicant in achieving these goals. The candidate's overall research goal is to better understand the epidemiology and pathogenesis of EoE in order to improve diagnosis and treatment. EoE is a rapidly emerging clinicopathologic entity defined by abnormal infiltration of eosinophils into the esophageal mucosa that leads to dysphagia, progressive esophageal stenosis, and food impaction. The specific goals of this research proposal are to validate our model of risk factors for diagnosis of EoE, and to assess the utility of serum levels of eotaxin-3 and IL-13 in diagnosis and monitoring of treatment of EoE. We will compare patients with newly diagnosed EoE to non-EoE controls, obtain baseline measures, reassess EoE patients after treatment, and also reassess untreated controls. The central premises to be tested are that: 1) clinical risk factors, coupled with non-invasive serum biomarkers, will lead to more accurate diagnosis of EoE;and 2) non-invasive biomarkers can be used to monitor treatment response. To support the candidate's career development, he will conduct a series of formal internships in selected basic science labs focusing on specific translational research techniques, as well as pursue advanced coursework and independent study in the areas of molecular techniques, biomarkers, and statistics as applied to public health and epidemiology. The mentorship and advising team, which includes internationally-recognized, independently-funded investigators with expertise in gastrointestinal epidemiology and translational team research (Sandler), esophageal diseases and translational research (Shaheen), cell and molecular physiology (Henning), and EoE pathogenesis and translational methods (Rothenberg), will guide Dr. Dellon's research and career development. The research environment including the Translational and Clinical Sciences Institute and Center for Gastrointestinal Biology and Disease at UNC provides a productive, collegial, and collaborative atmosphere in which to pursue the above research and training goals. At the conclusion of this program, Dr. Dellon will be positioned to be an independent physician-scientist leading a multidisciplinary translational research team.

Public Health Relevance

Eosinophilic esophagitis (EoE), a newly recognized disease with rapidly increasing incidence, prevalence, and recognition, is characterized by the abnormal presence of eosinophils in the esophageal lining, leading to difficulty swallowing, progressive esophageal stenosis, and food impaction. The goal of this and subsequent research is to better understand the risk factors, causes, and biologic markers of EoE in order to improve diagnosis and treatment. The proposed research may impact clinic practice by altering the way in which EoE is both diagnosed and monitored by decreasing the need for repeated costly and invasive procedures.

National Institute of Health (NIH)
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Mentored Patient-Oriented Research Career Development Award (K23)
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Study Section
Diabetes, Endocrinology and Metabolic Diseases B Subcommittee (DDK)
Program Officer
Podskalny, Judith M,
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University of North Carolina Chapel Hill
Internal Medicine/Medicine
Schools of Medicine
Chapel Hill
United States
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Wolf, W Asher; Cotton, Cary C; Green, Daniel J et al. (2015) Predictors of response to steroid therapy for eosinophilic esophagitis and treatment of steroid-refractory patients. Clin Gastroenterol Hepatol 13:452-8
Dellon, Evan S; Speck, Olga; Woodward, Kimberly et al. (2015) Distribution and variability of esophageal eosinophilia in patients undergoing upper endoscopy. Mod Pathol 28:383-90
Wen, Ting; Dellon, Evan S; Moawad, Fouad J et al. (2015) Transcriptome analysis of proton pump inhibitor-responsive esophageal eosinophilia reveals proton pump inhibitor-reversible allergic inflammation. J Allergy Clin Immunol 135:187-97
Dellon, Evan S; Jensen, Elizabeth T; Martin, Christopher F et al. (2014) Prevalence of eosinophilic esophagitis in the United States. Clin Gastroenterol Hepatol 12:589-96.e1
Dellon, Evan S; Kim, Hannah P; Sperry, Sarah L W et al. (2014) A phenotypic analysis shows that eosinophilic esophagitis is a progressive fibrostenotic disease. Gastrointest Endosc 79:577-85.e4
Rybnicek, D A; Hathorn, K E; Pfaff, E R et al. (2014) Administrative coding is specific, but not sensitive, for identifying eosinophilic esophagitis. Dis Esophagus 27:703-8
Dellon, Evan S; Speck, Olga; Woodward, Kimberly et al. (2014) Markers of eosinophilic inflammation for diagnosis of eosinophilic esophagitis and proton pump inhibitor-responsive esophageal eosinophilia: a prospective study. Clin Gastroenterol Hepatol 12:2015-22
Dellon, Evan S; Liacouras, Chris A (2014) Advances in clinical management of eosinophilic esophagitis. Gastroenterology 147:1238-54
Wolf, W Asher; Jerath, Maya R; Sperry, Sarah L W et al. (2014) Dietary elimination therapy is an effective option for adults with eosinophilic esophagitis. Clin Gastroenterol Hepatol 12:1272-9
Jensen, Elizabeth T; Hoffman, Kate; Shaheen, Nicholas J et al. (2014) Esophageal eosinophilia is increased in rural areas with low population density: results from a national pathology database. Am J Gastroenterol 109:668-75

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