Quotes from the abstract:
Spontaneous diabetes incidence reduced from 85% in controls to 65% in [hyperbaric oxygen treatment] (P = 0.01). ... Cyclophosphamide-induced diabetes onset was reduced from 85.3% in controls to 48% after [hyperbaric oxygen treatment] (P < 0.005) and paralleled by lower insulitis.Quote from the news article:
In mice, the treatment caused changes in the immune system's response to newly developing diabetes, and reduced the risk of diabetes between 20 and 40 percent. In the mice that still developed diabetes, the hyperbaric therapy delayed disease progression, the investigators found.
News article: http://health.usnews.com/health-news/news/articles/2012/05/11/oxygen-therapy-slows-type-1-diabetes-in-mice-study-says