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Maturity onset diabetes of the young
Maturity onset diabetes of the young (MODY) refers to any of several hereditary forms of diabetes caused by mutations in an autosomal dominant gene (sex independent, i.e. inherited from any of the parents) disrupting insulin production. MODY is often referred to as "monogenic diabetes" to distinguish it from the more common types of diabetes (especially type 1 and type 2), which involve more complex combinations of causes involving multiple genes (i.e., "polygenic") and environmental factors. MODY 2 and MODY 3 are the most common forms. "〔This page has previously claimed that MODY is equivalent to type 1 DM; however, the Oxford Handbook of Clinical Medicine states the above.〕 MODY should not be confused with latent autoimmune diabetes of adults (LADA) — a form of type 1 DM, with slower progression to insulin dependence in later life.
==History of the concept and treatment of MODY==
The term MODY dates back to 1964, when diabetes mellitus was considered to have two main forms: juvenile-onset and maturity-onset, which roughly corresponded to what we now call type 1 and type 2. MODY was originally applied to any child or young adult who had persistent, asymptomatic hyperglycemia without progression to diabetic ketosis or ketoacidosis. In retrospect we can now recognize that this category covered a heterogeneous collection of disorders which included cases of dominantly inherited diabetes (the topic of this article, still called MODY today), as well as cases of what we would now call type 2 diabetes occurring in childhood or adolescence, and a few even rarer types of hyperglycemia (e.g., mitochondrial diabetes or mutant insulin). Many of these patients were treated with sulfonylureas with varying degrees of success.
The current usage of the term MODY dates from a case report published in 1974.
By the 1990s, as the understanding of the pathophysiology of diabetes has improved, the concept and usage of MODY have become refined and narrower. It is now used as a synonym for dominantly inherited, monogenic defects of insulin secretion occurring at any age, and no longer includes any forms of type 2 diabetes.〔(【引用サイトリンク】accessdate=2014-12-04 )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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