TY - JOUR
T1 - Differential clinicopathologic and genetic features of late-onset amnestic dementias
AU - Murray, Melissa E.
AU - Cannon, Ashley
AU - Graff-Radford, Neill R.
AU - Liesinger, Amanda M.
AU - Rutherford, Nicola J.
AU - Ross, Owen A.
AU - Duara, Ranjan
AU - Carrasquillo, Minerva M.
AU - Rademakers, Rosa
AU - Dickson, Dennis W.
N1 - Funding Information:
Acknowledgments We thank the patients and their families who donated brains to help further our knowledge in neurodegeneration. The authors would like to acknowledge linda g. rousseau, Virginia r. Phillips, and Monica Castanedes-Casey for tissue processing and staining. The project was supported by the einstein Aging Study (P01 Ag03949), Mayo ADrC grant (P50 Ag16574), and the State of Florida Alzheimer’s Disease Initiative. MeM and this project were supported by the robert and Clarice Smith and Abigail Van Buren Alzheimer’s Disease research Program fellowship and the Mayo Clinic ADrC Pilot grant. DWD was supported by the robert e Jacoby Professorship for Alzheimer’s research.
PY - 2014/9
Y1 - 2014/9
N2 - Hippocampal sclerosis of the elderly (HpScl) and Alzheimer's disease (AD), especially the limbic-predominant subtype (LP-AD), are amnestic syndromes that can be difficult to distinguish. To complicate matters, a subset has concomitant HpScl and AD (HpScl-AD). We examined a large cohort of autopsy-confirmed cases of HpScl, HpScl-AD, LP-AD, and typical AD to identify distinct clinical, genetic, and pathologic characteristics. HpScl cases were significantly older at death and had a substantially slower rate of cognitive decline than the AD subtypes. Genetic analysis revealed that the AD groups (AD, LP-AD, and HpScl-AD) were more likely to be APOE ε4 carriers. In contrast, the HpScl groups (HpScl and HpScl-AD) were more likely to exhibit genetic variants in GRN and TMEM106B that are associated with frontotemporal lobar degeneration. The HpScl groups had a high frequency of TDP-43 pathology that was most often Type A morphology and distribution, while typical AD and LP-AD had a significantly lower frequency of TDP-43 pathology that was most often Type B. These results suggest that HpScl and AD are pathologically and genetically distinct and non-synergistic neurodegenerative processes that present with amnestic dementia. Pure HpScl and HpScl with concomitant AD occur most often in elderly individuals.
AB - Hippocampal sclerosis of the elderly (HpScl) and Alzheimer's disease (AD), especially the limbic-predominant subtype (LP-AD), are amnestic syndromes that can be difficult to distinguish. To complicate matters, a subset has concomitant HpScl and AD (HpScl-AD). We examined a large cohort of autopsy-confirmed cases of HpScl, HpScl-AD, LP-AD, and typical AD to identify distinct clinical, genetic, and pathologic characteristics. HpScl cases were significantly older at death and had a substantially slower rate of cognitive decline than the AD subtypes. Genetic analysis revealed that the AD groups (AD, LP-AD, and HpScl-AD) were more likely to be APOE ε4 carriers. In contrast, the HpScl groups (HpScl and HpScl-AD) were more likely to exhibit genetic variants in GRN and TMEM106B that are associated with frontotemporal lobar degeneration. The HpScl groups had a high frequency of TDP-43 pathology that was most often Type A morphology and distribution, while typical AD and LP-AD had a significantly lower frequency of TDP-43 pathology that was most often Type B. These results suggest that HpScl and AD are pathologically and genetically distinct and non-synergistic neurodegenerative processes that present with amnestic dementia. Pure HpScl and HpScl with concomitant AD occur most often in elderly individuals.
KW - APOE
KW - Alzheimer's disease
KW - GRN
KW - Hippocampal sclerosis
KW - Neurofibrillary tangles
KW - Neuropathology
KW - TDP-43
KW - TMEM106B
UR - http://www.scopus.com/inward/record.url?scp=84906317716&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84906317716&partnerID=8YFLogxK
U2 - 10.1007/s00401-014-1302-2
DO - 10.1007/s00401-014-1302-2
M3 - Article
C2 - 24899141
AN - SCOPUS:84906317716
SN - 0001-6322
VL - 128
SP - 411
EP - 421
JO - Acta neuropathologica
JF - Acta neuropathologica
IS - 3
ER -