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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Smith–Fineman–Myers syndrome ： ウィキペディア英語版 Smith–Fineman–Myers syndrome Smith–Fineman–Myers syndrome (SFMS1), also called X-linked mental retardation-hypotonic facies syndrome 1 (MRXHF1), Carpenter–Waziri syndrome, Chudley–Lowry syndrome, SFMS, Holmes–Gang syndrome and Juberg–Marsidi syndrome (JMS), is a rare X-linked recessive congenital disorder that causes birth defects. This syndrome was named after 3 men, Richard D. Smith, Robert M. Fineman and Gart G. Myers who discovered it around 1980.〔http://www.whonamedit.com/synd.cfm/2227.html〕 ==Genetics== SFMS is an X-linked disease by chromosome Xq13. X-linked diseases map to the human X chromosome because this syndrome is an X chromosome linked females who have two chromosomes are not affected but because males only have one X chromosome, they are more likely to be affected and show the full clinical symptoms. This disease only requires one copy of the abnormal X-linked gene to display the syndrome. Since females have two X chromosomes, the effect of one X chromosome is recessive and the second chromosome masks the affected chromosome.〔http://www.bookrags.com/research/smith-fineman-myers-syndrome-wog/〕 Affected fathers can never pass this X-linked disease to their sons but affected fathers can pass the X-linked gene to their daughters who has a 50% chance to pass this disease-causing gene to each of her children. Since females who inherit this gene do not show symptoms, they are called carriers. Each of the female's carrier's son has a 50% chance to display the symptoms but none of the female carrier's daughters would display any symptoms.〔http://health.yahoo.net/galecontent/smith-fineman-myers-syndrome〕 Some patients with SFMS have been founded to have a mutation of the gene in the ATRX on the X chromosome, also known as the Xq13 location. ATRX is a gene disease that is associated with other forms of X-linked mental retardation like Alpha-thalassemia/mental retardation syndrome, Carpenter syndrome, Juberg-Marsidi syndrome, and soastic paraplegia. It is possible that patients with SFMS have Alpha-thalassemia/mental retardation syndrome without the affected hemoglobin H that leads to Alphathalassemia/ mental retardation syndrome in the traditionally recognized disease.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Smith–Fineman–Myers syndrome」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.