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Huntington's DiseaseCauses & Risk FactorsHuntingtons disease is caused due to mutation in a gene called IT15 located on chromosome 4 (4p16.3) that is inherited as an autosomal dominant trait. This gene regulates, controls, or "encodes" production of a protein called Huntingtin and the pattern of inheritance is called autosomal dominant inheritance (4) & (5). HD is called an autosomal dominant disorder because only one copy of the defective gene, inherited from one parent, is necessary to produce the disease (6).
A child or an adult is at risk of inheriting or developing HD with 50% chance if one of his/her parent has the disease. In rare cases, one may develop the disease without a family history due to genetic mutation that could have happened during the fathers sperm development (7).
Article by Kona Vishnu, MS |
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Page Last Modified:
12/02/2010