Pamela A. Guerrerio, M.D., Ph.D.

Senior Investigator

Food Allergy Research Unit


Building 10, Room 11N240B
10 Center Drive
Bethesda, MD 20814


Research Topics

Food allergy has become a major public health problem in the United States. There is no cure, and little is known regarding the factors that account for the rising prevalence and severity of this disease. The overall goal of the Food Allergy Research Unit is to understand the key genetic, immunologic, and biochemical pathways that lead to the development of food allergy and how they can be manipulated for therapeutic benefit. We aim to achieve this goal using a multifaceted approach with studies involving both patients and mouse models of their diseases. Our current efforts are focused on the following three main areas.

Genetic diseases associated with the development of food allergy and other allergic conditions
We have recently shown that patients with Loeys-Dietz syndrome (LDS), an autosomal dominant disorder caused by mutations in genes encoding the receptor for TGFβ, exhibit a high prevalence of food allergy, asthma, eosinophilic esophagitis, and other allergic conditions. By studying LDS and other genetic disorders associated with defects in genes required for TGFβ signaling (e.g.,SMAD3, TGFB2, SKI), we can achieve greater insight into the key cellular and signaling pathways that regulate allergic inflammation. This information may have tremendous therapeutic implications not only for patients with these rare genetic conditions but also for the general population of patients who suffer from allergic diseases. Efforts are also ongoing to identify additional cases of severe food allergy inherited in a familial/syndromic fashion that will allow us to identify novel genes and pathways that drive the development of this and related disorders.

Environmental and immunologic factors that influence the development and severity of food allergy
Compelling evidence supports a role for both genetic and environmental factors in the development of food allergy, and we are interested in understanding how these two variables may interact in the pathogenesis of this disease. Our lab is also studying why only some patients who have IgE to foods experience an allergic reaction when they eat the food, and we are working to identify immunologic markers that can predict the severity and persistence of food allergy.

Novel therapies for the prevention and treatment of food allergy
A major goal of the Food Allergy Research Unit is to apply the information learned from the studies described above toward devising new prevention and treatment strategies for patients with food allergy. By achieving a greater understanding of the key environmental, immunologic, and biochemical pathways that drive the development of food allergy, we will be able to develop novel interventions that are based on a refined understanding of disease pathogenesis.


Dr. Guerrerio graduated with a B.S. degree in biology from the University of Iowa and entered the Medical Scientist Training Program at Johns Hopkins University, where she completed medical school and a Ph.D. in human genetics. She also did her residency in pediatrics and fellowship in allergy and immunology at Johns Hopkins. She subsequently joined the faculty at Johns Hopkins and was the recipient of the 2011 ARTrust Faculty Development Award from the American Academy of Asthma, Allergy & Immunology. In 2014, Dr. Guerrerio was appointed chief of the Food Allergy Research Unit.

Selected Publications

  1. Jhamnani RD, Levin S, Rasooly M, Stone KD, Milner JD, Nelson C, DiMaggio T, Jones N, Guerrerio AL, Frischmeyer-Guerrerio PA. Impact of food allergy on the growth of children with moderate-severe atopic dermatitis. J Allergy Clin Immunol. 2018;141(4):1526-1529.e4.
  2. Frischmeyer-Guerrerio PA, Masilamani M, Gu W, Brittain E, Wood R, Kim J, Nadeau K, Jarvinen KM, Grishin A, Lindblad R, Sampson HA. Mechanistic correlates of clinical responses to omalizumab in the setting of oral immunotherapy for milk allergy. J Allergy Clin Immunol. 2017;140(4):1043-1053.e8.
  3. Frischmeyer-Guerrerio PA, Guerrerio AL, Oswald G, Chichester K, Myers L, Halushka MK, Oliva-Hemker M, Wood RA, Dietz HC. TGFβ receptor mutations impose a strong predisposition for human allergic disease. Sci Transl Med. 2013;5(195):195ra94.
  4. Weissler KA, Rasooly M, DiMaggio T, Bolan H, Cantave D, Martino D, Neeland MR, Tang MLK, Dang TD, Allen KJ, Frischmeyer-Guerrerio PA. Identification and analysis of peanut-specific effector T and regulatory T cells in children allergic and tolerant to peanut. J Allergy Clin Immunol. 2018;141(5):1699-1710.e7.
  5. Monaco DR, Sie BM, Nirschl TR, Knight AC, Sampson HA, Nowak-Wegrzyn A, Wood RA, Hamilton RG, Frischmeyer-Guerrerio PA, Larman HB. Profiling serum antibodies with a pan allergen phage library identifies key wheat allergy epitopes. Nat Commun. 2021;12(1):379.

Related Scientific Focus Areas

This page was last updated on Thursday, August 19, 2021