Gametic and somatic tissue–specific heterogeneity of the expanded SCA1 CAG repeat in spinocerebellar ataxia type 1

1995 ◽  
Vol 10 (3) ◽  
pp. 344-350 ◽  
Author(s):  
Samuel S. Chong ◽  
Alanna E. McCall ◽  
Juan Cota ◽  
S.H. Subramony ◽  
Harry T. Orr ◽  
...  
Keyword(s):  
Spinocerebellar Ataxia ◽  
Somatic Tissue ◽  
Cag Repeat ◽  
Spinocerebellar Ataxia Type ◽  
Spinocerebellar Ataxia Type 1 ◽  
Tissue Specific

scholarly journals Patterns of CAG repeat instability in the central nervous system and periphery in Huntington’s disease and in spinocerebellar ataxia type 1

2020 ◽  
Vol 29 (15) ◽  
pp. 2551-2567 ◽  
Author(s):  
Ricardo Mouro Pinto ◽  
Larissa Arning ◽  
James V Giordano ◽  
Pedram Razghandi ◽  
Marissa A Andrew ◽  
...  
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Huntington's Disease ◽  
Spinocerebellar Ataxia ◽  
Repeat Expansion ◽  
Cag Repeat ◽  
Spinocerebellar Ataxia Type ◽  
Spinocerebellar Ataxia Type 1 ◽  
Cag Expansion

Abstract The expanded HTT CAG repeat causing Huntington’s disease (HD) exhibits somatic expansion proposed to drive the rate of disease onset by eliciting a pathological process that ultimately claims vulnerable cells. To gain insight into somatic expansion in humans, we performed comprehensive quantitative analyses of CAG expansion in ~50 central nervous system (CNS) and peripheral postmortem tissues from seven adult-onset and one juvenile-onset HD individual. We also assessed ATXN1 CAG repeat expansion in brain regions of an individual with a neurologically and pathologically distinct repeat expansion disorder, spinocerebellar ataxia type 1 (SCA1). Our findings reveal similar profiles of tissue instability in all HD individuals, which, notably, were also apparent in the SCA1 individual. CAG expansion was observed in all tissues, but to different degrees, with multiple cortical regions and neostriatum tending to have the greatest instability in the CNS, and liver in the periphery. These patterns indicate different propensities for CAG expansion contributed by disease locus-independent trans-factors and demonstrate that expansion per se is not sufficient to cause cell type or disease-specific pathology. Rather, pathology may reflect distinct toxic processes triggered by different repeat lengths across cell types and diseases. We also find that the HTT CAG length-dependent expansion propensity of an individual is reflected in all tissues and in cerebrospinal fluid. Our data indicate that peripheral cells may be a useful source to measure CAG expansion in biomarker assays for therapeutic efforts, prompting efforts to dissect underlying mechanisms of expansion that may differ between the brain and periphery.

Expansion of an unstable trinucleotide CAG repeat in spinocerebellar ataxia type 1

1993 ◽  
Vol 4 (3) ◽  
pp. 221-226 ◽  
Author(s):  
Harry T. Orr ◽  
Ming-yi Chung ◽  
Sandro Banfi ◽  
Thomas J. Kwiatkowski ◽  
Antonio Servadio ◽  
...  
Keyword(s):  
Spinocerebellar Ataxia ◽  
Cag Repeat ◽  
Spinocerebellar Ataxia Type ◽  
Spinocerebellar Ataxia Type 1

Striatal dopamine nerve terminal markers but not nigral cellularity are reduced in spinocerebellar ataxia type 1

Neurology ◽  
1997 ◽  
Vol 48 (4) ◽  
pp. 1109-1111 ◽  
Author(s):  
S. J. Kish ◽  
M. Guttman ◽  
Y. Robitaille ◽  
M. El-Awar ◽  
L. -J. Chang ◽  
...  
Keyword(s):  
Spinocerebellar Ataxia ◽  
Nerve Terminal ◽  
Striatal Dopamine ◽  
Spinocerebellar Ataxia Type ◽  
Spinocerebellar Ataxia Type 1
Sign in / Sign up

Export Citation Format

Share Document