Assertion: diabetes's cause | /r/HasProperty | studied
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Source sentences:
text: While the causes and mechanisms are still being studied and hypotheses abound, what is clear and agreed upon is that progressive beta cell destruction leads to dysfunction in the neighboring alpha cells which secrete glucagon, exacerbating excursions away from euglycemia in both directions; overproduction of glucagon after meals causes sharper hyperglycemia, and failure to stimulate glucagon upon incipient hypoglycemia prevents a glucagon-mediated rescue of glucose levels.