The effect of interleukin-22 treatment on autoimmune diabetes in the NOD mouse
AuthorBorg, DJ; Wang, R; Murray, L; Tong, H; Steptoe, RJ; McGuckin, MA; Hasnain, SZ
University of Melbourne Author/sMcGuckin, Michael
AffiliationMedicine Dentistry & Health Sciences
Document TypeJournal Article
CitationsBorg, D. J., Wang, R., Murray, L., Tong, H., Steptoe, R. J., McGuckin, M. A. & Hasnain, S. Z. (2017). The effect of interleukin-22 treatment on autoimmune diabetes in the NOD mouse. DIABETOLOGIA, 60 (11), pp.2256-2261. https://doi.org/10.1007/s00125-017-4392-2.
Access StatusOpen Access
AIMS/HYPOTHESIS: The aim of this study was to determine whether therapy with the cytokine IL-22 could be used to prevent the development of, or treat, autoimmune diabetes in the NOD mouse. METHODS: Six-week-old NOD mice were administered bi-weekly either recombinant mouse IL-22 (200 ng/g) or PBS (vehicle control) intraperitoneally until overt diabetes was diagnosed as two consecutive measurements of non-fasting blood glucose ≥ 11 mmol/l. At this time, NOD mice in the control arm were treated with LinBit insulin pellets and randomised to bi-weekly therapeutic injections of either PBS or IL-22 (200 ng/g) and followed until overt diabetes was diagnosed, as defined above. RESULTS: IL-22 therapy did not delay the onset of diabetes in comparison with the vehicle-treated mice. We did not observe an improvement in islet area, glycaemic control, beta cell residual function, endoplasmic reticulum stress, insulitis or macrophage and neutrophil infiltration as determined by non-fasting blood glucose, C-peptide and histological scoring. Therapeutic administration of IL-22 did not reduce circulating lipopolysaccharide, a marker of impaired gut mucosal integrity. CONCLUSIONS/INTERPRETATION: Our study suggests that, at this dosing regimen introduced either prior to overt diabetes or at diagnosis of diabetes, recombinant mouse IL-22 therapy cannot prevent autoimmune diabetes, or prolong the honeymoon period in the NOD mouse.
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