Noor H A Suaini1,2, Yichao Wang1,2, Victoria X Soriano1,2, David J Martino1,2,3, Katrina J Allen1,2,4,5, Justine A Ellis1,6,7, Jennifer J Koplin2,8. 1. Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia. 2. Centre for Food and Allergy Research, Murdoch Children's Research Institute, Parkville, Victoria, Australia. 3. Telethon Kids Institute, University of Western Australia, Perth, Western Australia, Australia. 4. Department of Allergy and Clinical Immunology, Royal Children's Hospital, Parkville, Victoria, Australia. 5. Institute of Inflammation and Repair, University of Manchester, Manchester, UK. 6. Genes, Environment & Complex Disease, Murdoch Children's Research Institute, Parkville, Victoria, Australia. 7. Centre for Social and Early Emotional Development, Faculty of Health, Deakin University, Burwood, Victoria, Australia. 8. School of Population and Global Health, University of Melbourne, Parkville, Victoria, Australia.
Abstract
BACKGROUND: The genetic determinants of food allergy have not been systematically reviewed. We therefore systematically reviewed the literature on the genetic basis of food allergy, identifying areas for further investigation. METHODS: We searched three electronic databases (MEDLINE, EMBASE and PubMed) on 9 January 2018. Two authors screened retrieved articles for review according to inclusion criteria and extracted relevant information on study characteristics and measures of association. Eligible studies included those that reported an unaffected nonatopic control group, had genetic information and were carried out in children. RESULTS: Of the 2088 studies retrieved, 32 met our inclusion criteria. Five were genome-wide association studies, and the remaining were candidate gene studies. Twenty-two of the studies were carried out in a predominantly Caucasian population with the remaining 10 from Asian-specific populations or unspecified ethnicity. We found FLG, HLA, IL10, IL13, as well as some evidence for other variants (SPINK5, SERPINB and C11orf30) that are associated with food allergy. CONCLUSIONS: Little genetic research has been carried out in food allergy, with FLG, HLA and IL13 being the most reproducible genes for an association with food allergy. Despite promising results, existing genetic studies on food allergy are inundated with issues such as inadequate sample size and absence of multiple testing correction. Few included replication analyses or population stratification measures. Studies addressing these limitations along with functional studies are therefore needed to unravel the mechanisms of action of the identified genes.
BACKGROUND: The genetic determinants of food allergy have not been systematically reviewed. We therefore systematically reviewed the literature on the genetic basis of food allergy, identifying areas for further investigation. METHODS: We searched three electronic databases (MEDLINE, EMBASE and PubMed) on 9 January 2018. Two authors screened retrieved articles for review according to inclusion criteria and extracted relevant information on study characteristics and measures of association. Eligible studies included those that reported an unaffected nonatopic control group, had genetic information and were carried out in children. RESULTS: Of the 2088 studies retrieved, 32 met our inclusion criteria. Five were genome-wide association studies, and the remaining were candidate gene studies. Twenty-two of the studies were carried out in a predominantly Caucasian population with the remaining 10 from Asian-specific populations or unspecified ethnicity. We found FLG, HLA, IL10, IL13, as well as some evidence for other variants (SPINK5, SERPINB and C11orf30) that are associated with food allergy. CONCLUSIONS: Little genetic research has been carried out in food allergy, with FLG, HLA and IL13 being the most reproducible genes for an association with food allergy. Despite promising results, existing genetic studies on food allergy are inundated with issues such as inadequate sample size and absence of multiple testing correction. Few included replication analyses or population stratification measures. Studies addressing these limitations along with functional studies are therefore needed to unravel the mechanisms of action of the identified genes.
Authors: Leah C Kottyan; Michael P Trimarchi; Xiaoming Lu; Julie M Caldwell; Avery Maddox; Sreeja Parameswaran; Michael Lape; Rahul J D'Mello; Madeline Bonfield; Adina Ballaban; Vincent Mukkada; Philip E Putnam; Pablo Abonia; Netali Ben-Baruch Morgenstern; Amy A Eapen; Ting Wen; Matthew T Weirauch; Marc E Rothenberg Journal: J Allergy Clin Immunol Date: 2020-10-23 Impact factor: 14.290