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Huntingtin (Htt) is the protein coded for in humans by the HTT gene, also known as the IT15 ("interesting transcript 15") gene. [5] Mutated HTT is the cause of Huntington's disease (HD), and has been investigated for this role and also for its involvement in long-term memory storage.
Huntington's disease has autosomal dominant inheritance, meaning that an affected individual typically inherits one copy of the gene with an expanded trinucleotide repeat (the mutant allele) from an affected parent. [26] Since the penetrance of the mutation is very high, those who have a mutated copy of the gene will have the disease.
This is the case for Huntington's disease, where the trinucleotide repeat encodes a long stretch of glutamine residues. When the repeat is present in an untranslated region, it could affect the expression of the gene in which the repeat is found (ex. fragile X ) or many genes through a dominant negative effect (ex. myotonic dystrophy ).
Gusella joined the faculty of Harvard Medical School in 1980, where he began collaborating with Nancy Wexler to study the genetic basis of Huntington's disease.Through linkage analysis of a large Venezuelan population of Huntington's disease kindreds, they mapped the location of the causal gene to the short arm of chromosome 4 in 1983. [4]
The following is a list of genetic disorders and if known, type of mutation and for the chromosome involved. Although the parlance "disease-causing gene" is common, it is the occurrence of an abnormality in the parents that causes the impairment to develop within the child. There are over 6,000 known genetic disorders in humans.
Do You Really Want to Know? is a 2012 documentary film directed by John Zaritsky and produced by Kevin Eastwood.Using interviews and dramatic recreations, the film recounts the stories of three families who carry the gene for Huntington's disease, a neurodegenerative illness which is the result of a genetic abnormality, whose symptoms typically appear in mid-life. [1]
Due to the wide range of genetic disorders that are known, diagnosis is widely varied and dependent of the disorder. Most genetic disorders are diagnosed pre-birth, at birth, or during early childhood however some, such as Huntington's disease, can escape detection until the patient begins exhibiting symptoms well into adulthood. [35]
Gillian Patricia Bates (born 19 May 1956) [1] FMedSci FRS is a British biologist. She is distinguished for her research into the molecular basis of Huntington's disease and in 1998 was awarded the GlaxoSmithKline Prize as a co-discoverer of the cause of this disease.