{"id":257,"date":"2012-03-05T18:40:45","date_gmt":"2012-03-05T18:40:45","guid":{"rendered":"http:\/\/stg-blogs.bmj.com\/jmg\/2012\/03\/05\/maternally-transmitted-late-onset-nonsyndromic-deafness-is-associated-with-the-novel-heteroplasmic-t12201c-mutation-in-the-mitochondrial-trnahis-gene\/"},"modified":"2012-03-06T00:05:22","modified_gmt":"2012-03-06T00:05:22","slug":"maternally-transmitted-late-onset-nonsyndromic-deafness-is-associated-with-the-novel-heteroplasmic-t12201c-mutation-in-the-mitochondrial-trnahis-gene","status":"publish","type":"post","link":"https:\/\/stg-blogs.bmj.com\/jmg\/2012\/03\/05\/maternally-transmitted-late-onset-nonsyndromic-deafness-is-associated-with-the-novel-heteroplasmic-t12201c-mutation-in-the-mitochondrial-trnahis-gene\/","title":{"rendered":"Maternally transmitted late-onset nonsyndromic deafness is associated with the novel heteroplasmic T12201C mutation in the mitochondrial tRNAHis gene"},"content":{"rendered":"<p>A specific genetic defect in one Chinese family shows that hearing loss was inherited from the female parent.\u00a0 The defect results from a point mutation \u2014 the substitution of a single DNA \u201cbase\u201d for another during replication \u2014 in the genes of a tiny cellular organ called the mitochondria, which generates a cell\u2019s energy. When reproductive cells come together to form an embryo, the mitochondrial DNA from the mother cell is passed on to the offspring. Evidence has suggested a mother-child inheritance link for hearing loss due to mitochondrial inheritance. Clinical, genetic, molecular and biochemical evidence that a mitochondrial mutation designated tRNAHis 12201 T&gt;C is associated with inherited hearing loss. A large family from eastern China in which 17 of 34 members who descended from the same female ancestor had hearing loss.\u00a0 Analysis of the mitochondrial genome of the maternal relatives and other tests revealed the site of the hearing loss-related mutation and showed that it impairs the mitochondrial translation and respiration chain.\u00a0 The findings show that inherited mitochondrial dysfunction is involved in hearing loss and may provide new insights into maternally transmitted <em>hearing loss, <\/em>valuable information for management and treatment of maternally inherited hearing loss. (By Prof. Min-Xin Guan, <a href=\"http:\/\/jmg.bmj.com\/content\/48\/10\/682\">http:\/\/jmg.bmj.com\/content\/48\/10\/682<\/a> )<!--TrendMD v2.4.8--><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A specific genetic defect in one Chinese family shows that hearing loss was inherited from the female parent.\u00a0 The defect results from a point mutation \u2014 the substitution of a single DNA \u201cbase\u201d for another during replication \u2014 in the genes of a tiny cellular organ called the mitochondria, which generates a cell\u2019s energy. When [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/stg-blogs.bmj.com\/jmg\/2012\/03\/05\/maternally-transmitted-late-onset-nonsyndromic-deafness-is-associated-with-the-novel-heteroplasmic-t12201c-mutation-in-the-mitochondrial-trnahis-gene\/\">Read More&#8230;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-257","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/stg-blogs.bmj.com\/jmg\/wp-json\/wp\/v2\/posts\/257","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/stg-blogs.bmj.com\/jmg\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/stg-blogs.bmj.com\/jmg\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/stg-blogs.bmj.com\/jmg\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/stg-blogs.bmj.com\/jmg\/wp-json\/wp\/v2\/comments?post=257"}],"version-history":[{"count":0,"href":"https:\/\/stg-blogs.bmj.com\/jmg\/wp-json\/wp\/v2\/posts\/257\/revisions"}],"wp:attachment":[{"href":"https:\/\/stg-blogs.bmj.com\/jmg\/wp-json\/wp\/v2\/media?parent=257"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/stg-blogs.bmj.com\/jmg\/wp-json\/wp\/v2\/categories?post=257"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/stg-blogs.bmj.com\/jmg\/wp-json\/wp\/v2\/tags?post=257"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}