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All rights reserved. http://resource.belframework.org/belframework/1.0/knowledge/large_corpus.bel http://purl.org/dc/elements/1.1/title BEL Framework Large Corpus Document http://resource.belframework.org/belframework/1.0/knowledge/large_corpus.bel http://purl.org/pav/authoredBy http://www.tkuhn.ch/bel2nanopub/RAHYFI3b9YSxuWxu3CpIBAYG3KBHRixYrvt22GZU8n23Y#_3 http://resource.belframework.org/belframework/1.0/knowledge/large_corpus.bel http://purl.org/pav/version 1.4 http://www.tkuhn.ch/bel2nanopub/RAHYFI3b9YSxuWxu3CpIBAYG3KBHRixYrvt22GZU8n23Y#_2 http://www.w3.org/ns/prov#value Moreover, because metformin has protective effects on nondiabetic beta-cells exposed to high glucose or free fatty acid levels, we investigated its direct action on T2D islet cells. Diabetic islets were characterized by reduced insulin content, decreased amount of mature insulin granules, impaired glucose-induced insulin secretion, reduced insulin mRNA expression, and increased apoptosis with enhanced caspase-3 and -8 activity. 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