Proof-of-concept recall-by-genotype study of extremely low and high Alzheimer’s polygenic risk reveals autobiographical deficits and cingulate cortex correlates

Background Genome-wide association studies demonstrate that Alzheimer’s disease (AD) has a highly polygenic architecture, where thousands of independent genetic variants explain risk with high classification accuracy. This AD polygenic risk score (AD-PRS) has been previously linked to preclinical co...
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Autor*in:	Lancaster, Thomas [verfasserIn] Creese, Byron Escott-Price, Valentina Driver, Ian Menzies, Georgina Khan, Zunera Corbett, Anne Ballard, Clive Williams, Julie Murphy, Kevin Chandler, Hannah

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2023

Schlagwörter:	Polygenic risk score Alzheimer’s disease Recall-by-genotype Neuroimaging

Anmerkung:	© The Author(s) 2023

Übergeordnetes Werk:	Enthalten in: Alzheimer's research & therapy - London : BioMed Central, 2009, 15(2023), 1 vom: 12. Dez.
Übergeordnetes Werk:	volume:15 ; year:2023 ; number:1 ; day:12 ; month:12

Links:	Volltext

DOI / URN:	10.1186/s13195-023-01362-y

Katalog-ID:	SPR054061245

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520			\|a Background Genome-wide association studies demonstrate that Alzheimer’s disease (AD) has a highly polygenic architecture, where thousands of independent genetic variants explain risk with high classification accuracy. This AD polygenic risk score (AD-PRS) has been previously linked to preclinical cognitive and neuroimaging features observed in asymptomatic individuals. However, shared variance between AD-PRS and neurocognitive features are small, suggesting limited preclinical utility. Methods Here, we recruited sixteen clinically asymptomatic individuals (mean age 67; range 58–76) with either extremely low / high AD-PRS (defined as at least 2 standard deviations from the wider sample mean (N = 4504; NEFFECTIVE = 90)) with comparable age sex and education level. We assessed group differences in autobiographical memory and T1-weighted structural neuroimaging features. Results We observed marked reductions in autobiographical recollection (Cohen’s d = − 1.66; PFDR = 0.014) and midline structure (cingulate) thickness (Cohen’s d = − 1.55, PFDR = 0.05), with no difference in hippocampal volume (P > 0.3). We further confirm the negative association between AD-PRS and cingulate thickness in a larger study with a comparable age (N = 31,966, β = − 0.002, P = 0.011), supporting the validity of our approach. Conclusions These observations conform with multiple streams of prior evidence suggesting alterations in cingulate structures may occur in individuals with higher AD genetic risk. We were able to use a genetically informed research design strategy that significantly improved the efficiency and power of the study. Thus, we further demonstrate that the recall-by-genotype of AD-PRS from wider samples is a promising approach for the detection, assessment, and intervention in specific individuals with increased AD genetic risk.
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allfields	10.1186/s13195-023-01362-y doi (DE-627)SPR054061245 (SPR)s13195-023-01362-y-e DE-627 ger DE-627 rakwb eng Lancaster, Thomas verfasserin aut Proof-of-concept recall-by-genotype study of extremely low and high Alzheimer’s polygenic risk reveals autobiographical deficits and cingulate cortex correlates 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2023 Background Genome-wide association studies demonstrate that Alzheimer’s disease (AD) has a highly polygenic architecture, where thousands of independent genetic variants explain risk with high classification accuracy. This AD polygenic risk score (AD-PRS) has been previously linked to preclinical cognitive and neuroimaging features observed in asymptomatic individuals. However, shared variance between AD-PRS and neurocognitive features are small, suggesting limited preclinical utility. Methods Here, we recruited sixteen clinically asymptomatic individuals (mean age 67; range 58–76) with either extremely low / high AD-PRS (defined as at least 2 standard deviations from the wider sample mean (N = 4504; NEFFECTIVE = 90)) with comparable age sex and education level. We assessed group differences in autobiographical memory and T1-weighted structural neuroimaging features. Results We observed marked reductions in autobiographical recollection (Cohen’s d = − 1.66; PFDR = 0.014) and midline structure (cingulate) thickness (Cohen’s d = − 1.55, PFDR = 0.05), with no difference in hippocampal volume (P > 0.3). We further confirm the negative association between AD-PRS and cingulate thickness in a larger study with a comparable age (N = 31,966, β = − 0.002, P = 0.011), supporting the validity of our approach. Conclusions These observations conform with multiple streams of prior evidence suggesting alterations in cingulate structures may occur in individuals with higher AD genetic risk. We were able to use a genetically informed research design strategy that significantly improved the efficiency and power of the study. Thus, we further demonstrate that the recall-by-genotype of AD-PRS from wider samples is a promising approach for the detection, assessment, and intervention in specific individuals with increased AD genetic risk. Polygenic risk score (dpeaa)DE-He213 Alzheimer’s disease (dpeaa)DE-He213 Recall-by-genotype (dpeaa)DE-He213 Neuroimaging (dpeaa)DE-He213 Creese, Byron aut Escott-Price, Valentina aut Driver, Ian aut Menzies, Georgina aut Khan, Zunera aut Corbett, Anne aut Ballard, Clive aut Williams, Julie aut Murphy, Kevin aut Chandler, Hannah aut Enthalten in Alzheimer's research & therapy London : BioMed Central, 2009 15(2023), 1 vom: 12. Dez. (DE-627)605683557 (DE-600)2506521-X 1758-9193 nnns volume:15 year:2023 number:1 day:12 month:12 https://dx.doi.org/10.1186/s13195-023-01362-y kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 15 2023 1 12 12
spelling	10.1186/s13195-023-01362-y doi (DE-627)SPR054061245 (SPR)s13195-023-01362-y-e DE-627 ger DE-627 rakwb eng Lancaster, Thomas verfasserin aut Proof-of-concept recall-by-genotype study of extremely low and high Alzheimer’s polygenic risk reveals autobiographical deficits and cingulate cortex correlates 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2023 Background Genome-wide association studies demonstrate that Alzheimer’s disease (AD) has a highly polygenic architecture, where thousands of independent genetic variants explain risk with high classification accuracy. This AD polygenic risk score (AD-PRS) has been previously linked to preclinical cognitive and neuroimaging features observed in asymptomatic individuals. However, shared variance between AD-PRS and neurocognitive features are small, suggesting limited preclinical utility. Methods Here, we recruited sixteen clinically asymptomatic individuals (mean age 67; range 58–76) with either extremely low / high AD-PRS (defined as at least 2 standard deviations from the wider sample mean (N = 4504; NEFFECTIVE = 90)) with comparable age sex and education level. We assessed group differences in autobiographical memory and T1-weighted structural neuroimaging features. Results We observed marked reductions in autobiographical recollection (Cohen’s d = − 1.66; PFDR = 0.014) and midline structure (cingulate) thickness (Cohen’s d = − 1.55, PFDR = 0.05), with no difference in hippocampal volume (P > 0.3). We further confirm the negative association between AD-PRS and cingulate thickness in a larger study with a comparable age (N = 31,966, β = − 0.002, P = 0.011), supporting the validity of our approach. Conclusions These observations conform with multiple streams of prior evidence suggesting alterations in cingulate structures may occur in individuals with higher AD genetic risk. We were able to use a genetically informed research design strategy that significantly improved the efficiency and power of the study. Thus, we further demonstrate that the recall-by-genotype of AD-PRS from wider samples is a promising approach for the detection, assessment, and intervention in specific individuals with increased AD genetic risk. Polygenic risk score (dpeaa)DE-He213 Alzheimer’s disease (dpeaa)DE-He213 Recall-by-genotype (dpeaa)DE-He213 Neuroimaging (dpeaa)DE-He213 Creese, Byron aut Escott-Price, Valentina aut Driver, Ian aut Menzies, Georgina aut Khan, Zunera aut Corbett, Anne aut Ballard, Clive aut Williams, Julie aut Murphy, Kevin aut Chandler, Hannah aut Enthalten in Alzheimer's research & therapy London : BioMed Central, 2009 15(2023), 1 vom: 12. Dez. (DE-627)605683557 (DE-600)2506521-X 1758-9193 nnns volume:15 year:2023 number:1 day:12 month:12 https://dx.doi.org/10.1186/s13195-023-01362-y kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 15 2023 1 12 12
allfields_unstemmed	10.1186/s13195-023-01362-y doi (DE-627)SPR054061245 (SPR)s13195-023-01362-y-e DE-627 ger DE-627 rakwb eng Lancaster, Thomas verfasserin aut Proof-of-concept recall-by-genotype study of extremely low and high Alzheimer’s polygenic risk reveals autobiographical deficits and cingulate cortex correlates 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2023 Background Genome-wide association studies demonstrate that Alzheimer’s disease (AD) has a highly polygenic architecture, where thousands of independent genetic variants explain risk with high classification accuracy. This AD polygenic risk score (AD-PRS) has been previously linked to preclinical cognitive and neuroimaging features observed in asymptomatic individuals. However, shared variance between AD-PRS and neurocognitive features are small, suggesting limited preclinical utility. Methods Here, we recruited sixteen clinically asymptomatic individuals (mean age 67; range 58–76) with either extremely low / high AD-PRS (defined as at least 2 standard deviations from the wider sample mean (N = 4504; NEFFECTIVE = 90)) with comparable age sex and education level. We assessed group differences in autobiographical memory and T1-weighted structural neuroimaging features. Results We observed marked reductions in autobiographical recollection (Cohen’s d = − 1.66; PFDR = 0.014) and midline structure (cingulate) thickness (Cohen’s d = − 1.55, PFDR = 0.05), with no difference in hippocampal volume (P > 0.3). We further confirm the negative association between AD-PRS and cingulate thickness in a larger study with a comparable age (N = 31,966, β = − 0.002, P = 0.011), supporting the validity of our approach. Conclusions These observations conform with multiple streams of prior evidence suggesting alterations in cingulate structures may occur in individuals with higher AD genetic risk. We were able to use a genetically informed research design strategy that significantly improved the efficiency and power of the study. Thus, we further demonstrate that the recall-by-genotype of AD-PRS from wider samples is a promising approach for the detection, assessment, and intervention in specific individuals with increased AD genetic risk. Polygenic risk score (dpeaa)DE-He213 Alzheimer’s disease (dpeaa)DE-He213 Recall-by-genotype (dpeaa)DE-He213 Neuroimaging (dpeaa)DE-He213 Creese, Byron aut Escott-Price, Valentina aut Driver, Ian aut Menzies, Georgina aut Khan, Zunera aut Corbett, Anne aut Ballard, Clive aut Williams, Julie aut Murphy, Kevin aut Chandler, Hannah aut Enthalten in Alzheimer's research & therapy London : BioMed Central, 2009 15(2023), 1 vom: 12. Dez. (DE-627)605683557 (DE-600)2506521-X 1758-9193 nnns volume:15 year:2023 number:1 day:12 month:12 https://dx.doi.org/10.1186/s13195-023-01362-y kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 15 2023 1 12 12
allfieldsGer	10.1186/s13195-023-01362-y doi (DE-627)SPR054061245 (SPR)s13195-023-01362-y-e DE-627 ger DE-627 rakwb eng Lancaster, Thomas verfasserin aut Proof-of-concept recall-by-genotype study of extremely low and high Alzheimer’s polygenic risk reveals autobiographical deficits and cingulate cortex correlates 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2023 Background Genome-wide association studies demonstrate that Alzheimer’s disease (AD) has a highly polygenic architecture, where thousands of independent genetic variants explain risk with high classification accuracy. This AD polygenic risk score (AD-PRS) has been previously linked to preclinical cognitive and neuroimaging features observed in asymptomatic individuals. However, shared variance between AD-PRS and neurocognitive features are small, suggesting limited preclinical utility. Methods Here, we recruited sixteen clinically asymptomatic individuals (mean age 67; range 58–76) with either extremely low / high AD-PRS (defined as at least 2 standard deviations from the wider sample mean (N = 4504; NEFFECTIVE = 90)) with comparable age sex and education level. We assessed group differences in autobiographical memory and T1-weighted structural neuroimaging features. Results We observed marked reductions in autobiographical recollection (Cohen’s d = − 1.66; PFDR = 0.014) and midline structure (cingulate) thickness (Cohen’s d = − 1.55, PFDR = 0.05), with no difference in hippocampal volume (P > 0.3). We further confirm the negative association between AD-PRS and cingulate thickness in a larger study with a comparable age (N = 31,966, β = − 0.002, P = 0.011), supporting the validity of our approach. Conclusions These observations conform with multiple streams of prior evidence suggesting alterations in cingulate structures may occur in individuals with higher AD genetic risk. We were able to use a genetically informed research design strategy that significantly improved the efficiency and power of the study. Thus, we further demonstrate that the recall-by-genotype of AD-PRS from wider samples is a promising approach for the detection, assessment, and intervention in specific individuals with increased AD genetic risk. Polygenic risk score (dpeaa)DE-He213 Alzheimer’s disease (dpeaa)DE-He213 Recall-by-genotype (dpeaa)DE-He213 Neuroimaging (dpeaa)DE-He213 Creese, Byron aut Escott-Price, Valentina aut Driver, Ian aut Menzies, Georgina aut Khan, Zunera aut Corbett, Anne aut Ballard, Clive aut Williams, Julie aut Murphy, Kevin aut Chandler, Hannah aut Enthalten in Alzheimer's research & therapy London : BioMed Central, 2009 15(2023), 1 vom: 12. Dez. (DE-627)605683557 (DE-600)2506521-X 1758-9193 nnns volume:15 year:2023 number:1 day:12 month:12 https://dx.doi.org/10.1186/s13195-023-01362-y kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 15 2023 1 12 12
allfieldsSound	10.1186/s13195-023-01362-y doi (DE-627)SPR054061245 (SPR)s13195-023-01362-y-e DE-627 ger DE-627 rakwb eng Lancaster, Thomas verfasserin aut Proof-of-concept recall-by-genotype study of extremely low and high Alzheimer’s polygenic risk reveals autobiographical deficits and cingulate cortex correlates 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2023 Background Genome-wide association studies demonstrate that Alzheimer’s disease (AD) has a highly polygenic architecture, where thousands of independent genetic variants explain risk with high classification accuracy. This AD polygenic risk score (AD-PRS) has been previously linked to preclinical cognitive and neuroimaging features observed in asymptomatic individuals. However, shared variance between AD-PRS and neurocognitive features are small, suggesting limited preclinical utility. Methods Here, we recruited sixteen clinically asymptomatic individuals (mean age 67; range 58–76) with either extremely low / high AD-PRS (defined as at least 2 standard deviations from the wider sample mean (N = 4504; NEFFECTIVE = 90)) with comparable age sex and education level. We assessed group differences in autobiographical memory and T1-weighted structural neuroimaging features. Results We observed marked reductions in autobiographical recollection (Cohen’s d = − 1.66; PFDR = 0.014) and midline structure (cingulate) thickness (Cohen’s d = − 1.55, PFDR = 0.05), with no difference in hippocampal volume (P > 0.3). We further confirm the negative association between AD-PRS and cingulate thickness in a larger study with a comparable age (N = 31,966, β = − 0.002, P = 0.011), supporting the validity of our approach. Conclusions These observations conform with multiple streams of prior evidence suggesting alterations in cingulate structures may occur in individuals with higher AD genetic risk. We were able to use a genetically informed research design strategy that significantly improved the efficiency and power of the study. Thus, we further demonstrate that the recall-by-genotype of AD-PRS from wider samples is a promising approach for the detection, assessment, and intervention in specific individuals with increased AD genetic risk. Polygenic risk score (dpeaa)DE-He213 Alzheimer’s disease (dpeaa)DE-He213 Recall-by-genotype (dpeaa)DE-He213 Neuroimaging (dpeaa)DE-He213 Creese, Byron aut Escott-Price, Valentina aut Driver, Ian aut Menzies, Georgina aut Khan, Zunera aut Corbett, Anne aut Ballard, Clive aut Williams, Julie aut Murphy, Kevin aut Chandler, Hannah aut Enthalten in Alzheimer's research & therapy London : BioMed Central, 2009 15(2023), 1 vom: 12. Dez. (DE-627)605683557 (DE-600)2506521-X 1758-9193 nnns volume:15 year:2023 number:1 day:12 month:12 https://dx.doi.org/10.1186/s13195-023-01362-y kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 15 2023 1 12 12
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author	Lancaster, Thomas
spellingShingle	Lancaster, Thomas misc Polygenic risk score misc Alzheimer’s disease misc Recall-by-genotype misc Neuroimaging Proof-of-concept recall-by-genotype study of extremely low and high Alzheimer’s polygenic risk reveals autobiographical deficits and cingulate cortex correlates
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topic_title	Proof-of-concept recall-by-genotype study of extremely low and high Alzheimer’s polygenic risk reveals autobiographical deficits and cingulate cortex correlates Polygenic risk score (dpeaa)DE-He213 Alzheimer’s disease (dpeaa)DE-He213 Recall-by-genotype (dpeaa)DE-He213 Neuroimaging (dpeaa)DE-He213
topic	misc Polygenic risk score misc Alzheimer’s disease misc Recall-by-genotype misc Neuroimaging
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title	Proof-of-concept recall-by-genotype study of extremely low and high Alzheimer’s polygenic risk reveals autobiographical deficits and cingulate cortex correlates
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title_sort	proof-of-concept recall-by-genotype study of extremely low and high alzheimer’s polygenic risk reveals autobiographical deficits and cingulate cortex correlates
title_auth	Proof-of-concept recall-by-genotype study of extremely low and high Alzheimer’s polygenic risk reveals autobiographical deficits and cingulate cortex correlates
abstract	Background Genome-wide association studies demonstrate that Alzheimer’s disease (AD) has a highly polygenic architecture, where thousands of independent genetic variants explain risk with high classification accuracy. This AD polygenic risk score (AD-PRS) has been previously linked to preclinical cognitive and neuroimaging features observed in asymptomatic individuals. However, shared variance between AD-PRS and neurocognitive features are small, suggesting limited preclinical utility. Methods Here, we recruited sixteen clinically asymptomatic individuals (mean age 67; range 58–76) with either extremely low / high AD-PRS (defined as at least 2 standard deviations from the wider sample mean (N = 4504; NEFFECTIVE = 90)) with comparable age sex and education level. We assessed group differences in autobiographical memory and T1-weighted structural neuroimaging features. Results We observed marked reductions in autobiographical recollection (Cohen’s d = − 1.66; PFDR = 0.014) and midline structure (cingulate) thickness (Cohen’s d = − 1.55, PFDR = 0.05), with no difference in hippocampal volume (P > 0.3). We further confirm the negative association between AD-PRS and cingulate thickness in a larger study with a comparable age (N = 31,966, β = − 0.002, P = 0.011), supporting the validity of our approach. Conclusions These observations conform with multiple streams of prior evidence suggesting alterations in cingulate structures may occur in individuals with higher AD genetic risk. We were able to use a genetically informed research design strategy that significantly improved the efficiency and power of the study. Thus, we further demonstrate that the recall-by-genotype of AD-PRS from wider samples is a promising approach for the detection, assessment, and intervention in specific individuals with increased AD genetic risk. © The Author(s) 2023
abstractGer	Background Genome-wide association studies demonstrate that Alzheimer’s disease (AD) has a highly polygenic architecture, where thousands of independent genetic variants explain risk with high classification accuracy. This AD polygenic risk score (AD-PRS) has been previously linked to preclinical cognitive and neuroimaging features observed in asymptomatic individuals. However, shared variance between AD-PRS and neurocognitive features are small, suggesting limited preclinical utility. Methods Here, we recruited sixteen clinically asymptomatic individuals (mean age 67; range 58–76) with either extremely low / high AD-PRS (defined as at least 2 standard deviations from the wider sample mean (N = 4504; NEFFECTIVE = 90)) with comparable age sex and education level. We assessed group differences in autobiographical memory and T1-weighted structural neuroimaging features. Results We observed marked reductions in autobiographical recollection (Cohen’s d = − 1.66; PFDR = 0.014) and midline structure (cingulate) thickness (Cohen’s d = − 1.55, PFDR = 0.05), with no difference in hippocampal volume (P > 0.3). We further confirm the negative association between AD-PRS and cingulate thickness in a larger study with a comparable age (N = 31,966, β = − 0.002, P = 0.011), supporting the validity of our approach. Conclusions These observations conform with multiple streams of prior evidence suggesting alterations in cingulate structures may occur in individuals with higher AD genetic risk. We were able to use a genetically informed research design strategy that significantly improved the efficiency and power of the study. Thus, we further demonstrate that the recall-by-genotype of AD-PRS from wider samples is a promising approach for the detection, assessment, and intervention in specific individuals with increased AD genetic risk. © The Author(s) 2023
abstract_unstemmed	Background Genome-wide association studies demonstrate that Alzheimer’s disease (AD) has a highly polygenic architecture, where thousands of independent genetic variants explain risk with high classification accuracy. This AD polygenic risk score (AD-PRS) has been previously linked to preclinical cognitive and neuroimaging features observed in asymptomatic individuals. However, shared variance between AD-PRS and neurocognitive features are small, suggesting limited preclinical utility. Methods Here, we recruited sixteen clinically asymptomatic individuals (mean age 67; range 58–76) with either extremely low / high AD-PRS (defined as at least 2 standard deviations from the wider sample mean (N = 4504; NEFFECTIVE = 90)) with comparable age sex and education level. We assessed group differences in autobiographical memory and T1-weighted structural neuroimaging features. Results We observed marked reductions in autobiographical recollection (Cohen’s d = − 1.66; PFDR = 0.014) and midline structure (cingulate) thickness (Cohen’s d = − 1.55, PFDR = 0.05), with no difference in hippocampal volume (P > 0.3). We further confirm the negative association between AD-PRS and cingulate thickness in a larger study with a comparable age (N = 31,966, β = − 0.002, P = 0.011), supporting the validity of our approach. Conclusions These observations conform with multiple streams of prior evidence suggesting alterations in cingulate structures may occur in individuals with higher AD genetic risk. We were able to use a genetically informed research design strategy that significantly improved the efficiency and power of the study. Thus, we further demonstrate that the recall-by-genotype of AD-PRS from wider samples is a promising approach for the detection, assessment, and intervention in specific individuals with increased AD genetic risk. © The Author(s) 2023
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title_short	Proof-of-concept recall-by-genotype study of extremely low and high Alzheimer’s polygenic risk reveals autobiographical deficits and cingulate cortex correlates
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This AD polygenic risk score (AD-PRS) has been previously linked to preclinical cognitive and neuroimaging features observed in asymptomatic individuals. However, shared variance between AD-PRS and neurocognitive features are small, suggesting limited preclinical utility. Methods Here, we recruited sixteen clinically asymptomatic individuals (mean age 67; range 58–76) with either extremely low / high AD-PRS (defined as at least 2 standard deviations from the wider sample mean (N = 4504; NEFFECTIVE = 90)) with comparable age sex and education level. We assessed group differences in autobiographical memory and T1-weighted structural neuroimaging features. Results We observed marked reductions in autobiographical recollection (Cohen’s d = − 1.66; PFDR = 0.014) and midline structure (cingulate) thickness (Cohen’s d = − 1.55, PFDR = 0.05), with no difference in hippocampal volume (P > 0.3). We further confirm the negative association between AD-PRS and cingulate thickness in a larger study with a comparable age (N = 31,966, β = − 0.002, P = 0.011), supporting the validity of our approach. Conclusions These observations conform with multiple streams of prior evidence suggesting alterations in cingulate structures may occur in individuals with higher AD genetic risk. We were able to use a genetically informed research design strategy that significantly improved the efficiency and power of the study. 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Proof-of-concept recall-by-genotype study of extremely low and high Alzheimer’s polygenic risk reveals autobiographical deficits and cingulate cortex correlates

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