| Primary Identifier | MGI:2389466 | Allele Type | Transgenic |
| Attribute String | Humanized sequence, Inserted expressed sequence | Gene | Tg(HDexon1)61Gpb |
| Strain of Origin | CBA x C57BL/6 | Is Recombinase | false |
| Is Wild Type | false |
| description | The transgene is ubiquitously expressed. Transgenic mice on a background that involves C57BL/6 and CBA display a progressive neurological phenotype that mimics many of the features of Huntington Disease in humans, including choreiform-like movements, involuntary stereotypic movements, tremor, and epileptic seizures, as well as nonmovement disorder components, including unusual vocalization. Frequent urination and loss of body weight and muscle bulk occurs through the course of the disease. Neurological developments include Neuronal Intranuclear Inclusions (NII), which contain both the huntingtin and ubiquitin proteins (NII have subsequently been identified in human HD patients). Onset of HD symptoms occurs between 15 and 21 weeks of age. |
| molecularNote | A human HD fragment containing a polyglutamine-repeat expansion was isolated from a clone derived from a patient with Huntington's disease. The transgene contained approximately 1 kb of 5' UTR region, exon 1 which initially contained 113 CAG repeats, and 262 bp of intron 1 followed by a neomycin cassette. Subsequent analysis showed that the number of CAG repeats was prone to increase due to instability in the germline, and a range of 109.5 to 121 was observed. |
