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Definition This line is transgenic for the 5' end of This line is transgenic for the 5' end of the human HD gene carrying (CAG)115-(CAG)150 repeat expansions. The transgene is ubiquitously expressed. Transgenic mice exhibit a progressive neurological phenotype that mimics many of the features of HD, including choreiform-like movements, involuntary stereotypic movements, tremor, and epileptic seizures, as well as nonmovement disorder components, including unusual vocalization. They urinate frequently and exhibit loss of body weight and muscle bulk through the course of the disease. Neurologically they develop Neuronal Intranuclear Inclusions (NII) which contain both the huntingtin and ubiquitin proteins. Previously unknown, these NII have subsequently been identified in human HD patients. The age of onset of HD symptoms is reported to occur between nine and 11 weeks. Commonly known as the "R6/2" strain.\n\nTransgenic mice develop hyperglycemia by 12 weeks of age with a corresponding decrease in insulin levels. Pancreatic beta cells develop huntingtin inclusions as early as seven weeks of age, by 12 weeks more than 95% of beta cells have inclusions. Pancreatic alpha and delta cells also exhibit some inclusions (24% and 6% of cells, respectively) by 12 weeks. Pancreatic islets become hypotonic and beta cells are dramatically reduced in number by 12 weeks. Beta cells contain very few insulin secretory vesicles. (Bjorkquvist M et al. 2005) tory vesicles. (Bjorkquvist M et al. 2005)
Label 1J  +
Modification dateThis property is a special property in this wiki. 30 May 2009 06:48:59  +
ModifiedDate 30 May 2009  +
SuperCategory Mutant mouse strain  +
Categories Mutant mouse strain
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