Id |
Subject |
Object |
Predicate |
Lexical cue |
T1 |
0-121 |
DRI_Outcome |
denotes |
Age-dependent and tissue-specific CAG repeat instability occurs in mouse knock-in for a mutant Huntington's disease gene. |
T2 |
122-251 |
DRI_Challenge |
denotes |
Huntington's disease (HD) is a neurodegenerative disorder characterized by the expansion of CAG repeats in exon 1 of the HD gene. |
T3 |
252-442 |
DRI_Outcome |
denotes |
To clarify the instability of expanded CAG repeats in HD patients, an HD model mouse has been generated by gene replacement with human exon 1 of the HD gene with expansion to 77 CAG repeats. |
T4 |
443-574 |
DRI_Background |
denotes |
Chimeric proteins composed of human mutated exon 1 and mouse huntingtin are expressed ubiquitously in brain and peripheral tissues. |
T5 |
575-744 |
DRI_Outcome |
denotes |
One or two CAG repeat expansion was found in litters from paternal transmission, whereas contraction of CAG repeat in litters was observed through maternal transmission. |
T6 |
745-879 |
DRI_Outcome |
denotes |
Elderly mice show greater CAG repeat instability than younger mice, and a unique case was observed of an expanded 97 CAG repeat mouse. |
T7 |
880-1026 |
DRI_Challenge |
denotes |
Somatic CAG repeat instability is particularly pronounced in the liver, kidney, stomach, and brain but not in the cerebellum of 100-week-old mice. |
T8 |
1027-1163 |
DRI_Outcome |
denotes |
The same results of expanded CAG repeat instability as observed in this HD model mouse were confirmed in the human brain of HD patients. |
T9 |
1164-1401 |
DRI_Background |
denotes |
Glial fibrillary acidic protein (GFAP)-positive cells have been found to be increased in the substantia nigra (SN), globus pallidus (GP), and striatum (St) in the brains of 40-week-old affected mice, although without neuronal cell death. |
T10 |
1402-1535 |
DRI_Outcome |
denotes |
The CAG repeat instability and increase in GFAP-positive cells in this mouse model appear to mirror the abnormalities in HD patients. |
T11 |
1536-1666 |
DRI_Outcome |
denotes |
The HD model mouse may therefore have advantages for investigations of molecular mechanisms underlying instability of CAG repeats. |