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Oral insulin does not alter gut microbiota composition of NOD mice
Author(s) -
Kihl Pernille,
Krych Lukasz,
Buschard Karsten,
Wesley Johnna D.,
Kot Witold,
Hansen Axel Kornerup,
Nielsen Dennis S.,
Herrath Matthias G.
Publication year - 2018
Publication title -
diabetes/metabolism research and reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.307
H-Index - 110
eISSN - 1520-7560
pISSN - 1520-7552
DOI - 10.1002/dmrr.3010
Subject(s) - insulin , gut flora , diabetes mellitus , nod mice , medicine , endocrinology , type 1 diabetes , type 2 diabetes , nod , incidence (geometry) , biology , physiology , immunology , physics , optics
Abstract Background Oral insulin as a preventive strategy and/or treatment of type 1 diabetes has been the target of much research. Producing oral insulins is a complex and challenging task, with numerous pitfalls, due to physiological, physical, and biochemical barriers. Our aim was to determine the impact of oral insulin on the delicate gut microbiota composition. Methods Female nonobese diabetic mice were given oral porcine insulin 2 times a week from 5 weeks of age for 4 weeks, and then subsequently once a week for 21 weeks, or until euthanized. The mice were divided into groups on a gluten‐reduced diet or a standard diet. Gut microbiota composition was analysed based on faecal samples, and the type 1 diabetes incidence of the mice was monitored. Results We observed no influence of the oral porcine insulin on the gut microbiota composition of mice on a gluten‐reduced or a standard diet at 9 weeks of age. Also, the administration of oral insulin did not influence the incidence of type 1 diabetes at 30 weeks of age. Conclusions Oral porcine insulin does not alter the gut microbiota composition of nonobese diabetic mice on either a gluten‐reduced diet or standard diet. Also, the oral porcine insulin did not influence the incidence of type 1 diabetes in the groups.