Genetic screening in early-onset Alzheimer's disease identified three novel presenilin mutations
Mutations in presenilin 1 (PSEN1), presenilin 2 (PSEN2), and amyloid precursor protein (APP) are major genetic causes of early-onset Alzheimer's disease (EOAD). Clinical heterogeneity is frequently observed in patients with PSEN1 and PSEN2 mutations. Using whole exome sequencing, we screened a...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Wong, Tsz Hang [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2020transfer abstract |
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| Schlagwörter: |
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| Umfang: |
18096 |
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| Übergeordnetes Werk: |
Enthalten in: Corrigendum to “Electrical and thermal transport properties of Fe–Ni based ternary alloys in the earth's inner core: An ab initio study” [Physics of the Earth and Planetary Interiors - Zidane, Mustapha ELSEVIER, 2021, Amsterdam [u.a.] |
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| Übergeordnetes Werk: |
volume:86 ; year:2020 ; pages:2019-20114 ; extent:18096 |
| Links: |
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| DOI / URN: |
10.1016/j.neurobiolaging.2019.01.015 |
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ELV049193589 |
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| 245 | 1 | 0 | |a Genetic screening in early-onset Alzheimer's disease identified three novel presenilin mutations |
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| 520 | |a Mutations in presenilin 1 (PSEN1), presenilin 2 (PSEN2), and amyloid precursor protein (APP) are major genetic causes of early-onset Alzheimer's disease (EOAD). Clinical heterogeneity is frequently observed in patients with PSEN1 and PSEN2 mutations. Using whole exome sequencing, we screened a Dutch cohort of 68 patients with EOAD for rare variants in Mendelian Alzheimer's disease, frontotemporal dementia, and prion disease genes. We identified 3 PSEN1 and 2 PSEN2 variants. Three variants, 1 in PSEN1 (p.H21Profs*2) and both PSEN2 (p.A415S and p.M174I), were novel and absent in control exomes. These novel variants can be classified as probable pathogenic, except for PSEN1 (p.H21Profs*2) in which the pathogenicity is uncertain. The initial clinical symptoms between mutation carriers varied from behavioral problems to memory impairment. Our findings extend the mutation spectrum of EOAD and underline the clinical heterogeneity among PSEN1 and PSEN2 mutation carriers. Screening for Alzheimer's disease–causing genes is indicated in presenile dementia with an overlapping clinical diagnosis. | ||
| 520 | |a Mutations in presenilin 1 (PSEN1), presenilin 2 (PSEN2), and amyloid precursor protein (APP) are major genetic causes of early-onset Alzheimer's disease (EOAD). Clinical heterogeneity is frequently observed in patients with PSEN1 and PSEN2 mutations. Using whole exome sequencing, we screened a Dutch cohort of 68 patients with EOAD for rare variants in Mendelian Alzheimer's disease, frontotemporal dementia, and prion disease genes. We identified 3 PSEN1 and 2 PSEN2 variants. Three variants, 1 in PSEN1 (p.H21Profs*2) and both PSEN2 (p.A415S and p.M174I), were novel and absent in control exomes. These novel variants can be classified as probable pathogenic, except for PSEN1 (p.H21Profs*2) in which the pathogenicity is uncertain. The initial clinical symptoms between mutation carriers varied from behavioral problems to memory impairment. Our findings extend the mutation spectrum of EOAD and underline the clinical heterogeneity among PSEN1 and PSEN2 mutation carriers. Screening for Alzheimer's disease–causing genes is indicated in presenile dementia with an overlapping clinical diagnosis. | ||
| 650 | 7 | |a Early-onset Alzheimer's disease |2 Elsevier | |
| 650 | 7 | |a Exome sequencing |2 Elsevier | |
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| 700 | 1 | |a Seelaar, Harro |4 oth | |
| 700 | 1 | |a Melhem, Shamiram |4 oth | |
| 700 | 1 | |a Rozemuller, Annemieke J.M. |4 oth | |
| 700 | 1 | |a van Swieten, John C. |4 oth | |
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10.1016/j.neurobiolaging.2019.01.015 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000891.pica (DE-627)ELV049193589 (ELSEVIER)S0197-4580(19)30029-6 DE-627 ger DE-627 rakwb eng 550 520 VZ 38.70 bkl 39.53 bkl Wong, Tsz Hang verfasserin aut Genetic screening in early-onset Alzheimer's disease identified three novel presenilin mutations 2020transfer abstract 18096 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Mutations in presenilin 1 (PSEN1), presenilin 2 (PSEN2), and amyloid precursor protein (APP) are major genetic causes of early-onset Alzheimer's disease (EOAD). Clinical heterogeneity is frequently observed in patients with PSEN1 and PSEN2 mutations. Using whole exome sequencing, we screened a Dutch cohort of 68 patients with EOAD for rare variants in Mendelian Alzheimer's disease, frontotemporal dementia, and prion disease genes. We identified 3 PSEN1 and 2 PSEN2 variants. Three variants, 1 in PSEN1 (p.H21Profs*2) and both PSEN2 (p.A415S and p.M174I), were novel and absent in control exomes. These novel variants can be classified as probable pathogenic, except for PSEN1 (p.H21Profs*2) in which the pathogenicity is uncertain. The initial clinical symptoms between mutation carriers varied from behavioral problems to memory impairment. Our findings extend the mutation spectrum of EOAD and underline the clinical heterogeneity among PSEN1 and PSEN2 mutation carriers. Screening for Alzheimer's disease–causing genes is indicated in presenile dementia with an overlapping clinical diagnosis. Mutations in presenilin 1 (PSEN1), presenilin 2 (PSEN2), and amyloid precursor protein (APP) are major genetic causes of early-onset Alzheimer's disease (EOAD). Clinical heterogeneity is frequently observed in patients with PSEN1 and PSEN2 mutations. Using whole exome sequencing, we screened a Dutch cohort of 68 patients with EOAD for rare variants in Mendelian Alzheimer's disease, frontotemporal dementia, and prion disease genes. We identified 3 PSEN1 and 2 PSEN2 variants. Three variants, 1 in PSEN1 (p.H21Profs*2) and both PSEN2 (p.A415S and p.M174I), were novel and absent in control exomes. These novel variants can be classified as probable pathogenic, except for PSEN1 (p.H21Profs*2) in which the pathogenicity is uncertain. The initial clinical symptoms between mutation carriers varied from behavioral problems to memory impairment. Our findings extend the mutation spectrum of EOAD and underline the clinical heterogeneity among PSEN1 and PSEN2 mutation carriers. Screening for Alzheimer's disease–causing genes is indicated in presenile dementia with an overlapping clinical diagnosis. Early-onset Alzheimer's disease Elsevier Exome sequencing Elsevier PSEN2 Elsevier PSEN1 Elsevier Seelaar, Harro oth Melhem, Shamiram oth Rozemuller, Annemieke J.M. oth van Swieten, John C. oth Enthalten in Elsevier Science Zidane, Mustapha ELSEVIER Corrigendum to “Electrical and thermal transport properties of Fe–Ni based ternary alloys in the earth's inner core: An ab initio study” [Physics of the Earth and Planetary Interiors 2021 Amsterdam [u.a.] (DE-627)ELV005660645 volume:86 year:2020 pages:2019-20114 extent:18096 https://doi.org/10.1016/j.neurobiolaging.2019.01.015 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-GGO SSG-OPC-GEO SSG-OPC-AST 38.70 Geophysik: Allgemeines VZ 39.53 Planeten VZ AR 86 2020 2019-20114 18096 86.2020, 201.e9-, (18096 S.) |
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10.1016/j.neurobiolaging.2019.01.015 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000891.pica (DE-627)ELV049193589 (ELSEVIER)S0197-4580(19)30029-6 DE-627 ger DE-627 rakwb eng 550 520 VZ 38.70 bkl 39.53 bkl Wong, Tsz Hang verfasserin aut Genetic screening in early-onset Alzheimer's disease identified three novel presenilin mutations 2020transfer abstract 18096 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Mutations in presenilin 1 (PSEN1), presenilin 2 (PSEN2), and amyloid precursor protein (APP) are major genetic causes of early-onset Alzheimer's disease (EOAD). Clinical heterogeneity is frequently observed in patients with PSEN1 and PSEN2 mutations. Using whole exome sequencing, we screened a Dutch cohort of 68 patients with EOAD for rare variants in Mendelian Alzheimer's disease, frontotemporal dementia, and prion disease genes. We identified 3 PSEN1 and 2 PSEN2 variants. Three variants, 1 in PSEN1 (p.H21Profs*2) and both PSEN2 (p.A415S and p.M174I), were novel and absent in control exomes. These novel variants can be classified as probable pathogenic, except for PSEN1 (p.H21Profs*2) in which the pathogenicity is uncertain. The initial clinical symptoms between mutation carriers varied from behavioral problems to memory impairment. Our findings extend the mutation spectrum of EOAD and underline the clinical heterogeneity among PSEN1 and PSEN2 mutation carriers. Screening for Alzheimer's disease–causing genes is indicated in presenile dementia with an overlapping clinical diagnosis. Mutations in presenilin 1 (PSEN1), presenilin 2 (PSEN2), and amyloid precursor protein (APP) are major genetic causes of early-onset Alzheimer's disease (EOAD). Clinical heterogeneity is frequently observed in patients with PSEN1 and PSEN2 mutations. Using whole exome sequencing, we screened a Dutch cohort of 68 patients with EOAD for rare variants in Mendelian Alzheimer's disease, frontotemporal dementia, and prion disease genes. We identified 3 PSEN1 and 2 PSEN2 variants. Three variants, 1 in PSEN1 (p.H21Profs*2) and both PSEN2 (p.A415S and p.M174I), were novel and absent in control exomes. These novel variants can be classified as probable pathogenic, except for PSEN1 (p.H21Profs*2) in which the pathogenicity is uncertain. The initial clinical symptoms between mutation carriers varied from behavioral problems to memory impairment. Our findings extend the mutation spectrum of EOAD and underline the clinical heterogeneity among PSEN1 and PSEN2 mutation carriers. Screening for Alzheimer's disease–causing genes is indicated in presenile dementia with an overlapping clinical diagnosis. Early-onset Alzheimer's disease Elsevier Exome sequencing Elsevier PSEN2 Elsevier PSEN1 Elsevier Seelaar, Harro oth Melhem, Shamiram oth Rozemuller, Annemieke J.M. oth van Swieten, John C. oth Enthalten in Elsevier Science Zidane, Mustapha ELSEVIER Corrigendum to “Electrical and thermal transport properties of Fe–Ni based ternary alloys in the earth's inner core: An ab initio study” [Physics of the Earth and Planetary Interiors 2021 Amsterdam [u.a.] (DE-627)ELV005660645 volume:86 year:2020 pages:2019-20114 extent:18096 https://doi.org/10.1016/j.neurobiolaging.2019.01.015 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-GGO SSG-OPC-GEO SSG-OPC-AST 38.70 Geophysik: Allgemeines VZ 39.53 Planeten VZ AR 86 2020 2019-20114 18096 86.2020, 201.e9-, (18096 S.) |
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10.1016/j.neurobiolaging.2019.01.015 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000891.pica (DE-627)ELV049193589 (ELSEVIER)S0197-4580(19)30029-6 DE-627 ger DE-627 rakwb eng 550 520 VZ 38.70 bkl 39.53 bkl Wong, Tsz Hang verfasserin aut Genetic screening in early-onset Alzheimer's disease identified three novel presenilin mutations 2020transfer abstract 18096 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Mutations in presenilin 1 (PSEN1), presenilin 2 (PSEN2), and amyloid precursor protein (APP) are major genetic causes of early-onset Alzheimer's disease (EOAD). Clinical heterogeneity is frequently observed in patients with PSEN1 and PSEN2 mutations. Using whole exome sequencing, we screened a Dutch cohort of 68 patients with EOAD for rare variants in Mendelian Alzheimer's disease, frontotemporal dementia, and prion disease genes. We identified 3 PSEN1 and 2 PSEN2 variants. Three variants, 1 in PSEN1 (p.H21Profs*2) and both PSEN2 (p.A415S and p.M174I), were novel and absent in control exomes. These novel variants can be classified as probable pathogenic, except for PSEN1 (p.H21Profs*2) in which the pathogenicity is uncertain. The initial clinical symptoms between mutation carriers varied from behavioral problems to memory impairment. Our findings extend the mutation spectrum of EOAD and underline the clinical heterogeneity among PSEN1 and PSEN2 mutation carriers. Screening for Alzheimer's disease–causing genes is indicated in presenile dementia with an overlapping clinical diagnosis. Mutations in presenilin 1 (PSEN1), presenilin 2 (PSEN2), and amyloid precursor protein (APP) are major genetic causes of early-onset Alzheimer's disease (EOAD). Clinical heterogeneity is frequently observed in patients with PSEN1 and PSEN2 mutations. Using whole exome sequencing, we screened a Dutch cohort of 68 patients with EOAD for rare variants in Mendelian Alzheimer's disease, frontotemporal dementia, and prion disease genes. We identified 3 PSEN1 and 2 PSEN2 variants. Three variants, 1 in PSEN1 (p.H21Profs*2) and both PSEN2 (p.A415S and p.M174I), were novel and absent in control exomes. These novel variants can be classified as probable pathogenic, except for PSEN1 (p.H21Profs*2) in which the pathogenicity is uncertain. The initial clinical symptoms between mutation carriers varied from behavioral problems to memory impairment. Our findings extend the mutation spectrum of EOAD and underline the clinical heterogeneity among PSEN1 and PSEN2 mutation carriers. Screening for Alzheimer's disease–causing genes is indicated in presenile dementia with an overlapping clinical diagnosis. Early-onset Alzheimer's disease Elsevier Exome sequencing Elsevier PSEN2 Elsevier PSEN1 Elsevier Seelaar, Harro oth Melhem, Shamiram oth Rozemuller, Annemieke J.M. oth van Swieten, John C. oth Enthalten in Elsevier Science Zidane, Mustapha ELSEVIER Corrigendum to “Electrical and thermal transport properties of Fe–Ni based ternary alloys in the earth's inner core: An ab initio study” [Physics of the Earth and Planetary Interiors 2021 Amsterdam [u.a.] (DE-627)ELV005660645 volume:86 year:2020 pages:2019-20114 extent:18096 https://doi.org/10.1016/j.neurobiolaging.2019.01.015 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-GGO SSG-OPC-GEO SSG-OPC-AST 38.70 Geophysik: Allgemeines VZ 39.53 Planeten VZ AR 86 2020 2019-20114 18096 86.2020, 201.e9-, (18096 S.) |
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10.1016/j.neurobiolaging.2019.01.015 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000891.pica (DE-627)ELV049193589 (ELSEVIER)S0197-4580(19)30029-6 DE-627 ger DE-627 rakwb eng 550 520 VZ 38.70 bkl 39.53 bkl Wong, Tsz Hang verfasserin aut Genetic screening in early-onset Alzheimer's disease identified three novel presenilin mutations 2020transfer abstract 18096 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Mutations in presenilin 1 (PSEN1), presenilin 2 (PSEN2), and amyloid precursor protein (APP) are major genetic causes of early-onset Alzheimer's disease (EOAD). Clinical heterogeneity is frequently observed in patients with PSEN1 and PSEN2 mutations. Using whole exome sequencing, we screened a Dutch cohort of 68 patients with EOAD for rare variants in Mendelian Alzheimer's disease, frontotemporal dementia, and prion disease genes. We identified 3 PSEN1 and 2 PSEN2 variants. Three variants, 1 in PSEN1 (p.H21Profs*2) and both PSEN2 (p.A415S and p.M174I), were novel and absent in control exomes. These novel variants can be classified as probable pathogenic, except for PSEN1 (p.H21Profs*2) in which the pathogenicity is uncertain. The initial clinical symptoms between mutation carriers varied from behavioral problems to memory impairment. Our findings extend the mutation spectrum of EOAD and underline the clinical heterogeneity among PSEN1 and PSEN2 mutation carriers. Screening for Alzheimer's disease–causing genes is indicated in presenile dementia with an overlapping clinical diagnosis. Mutations in presenilin 1 (PSEN1), presenilin 2 (PSEN2), and amyloid precursor protein (APP) are major genetic causes of early-onset Alzheimer's disease (EOAD). Clinical heterogeneity is frequently observed in patients with PSEN1 and PSEN2 mutations. Using whole exome sequencing, we screened a Dutch cohort of 68 patients with EOAD for rare variants in Mendelian Alzheimer's disease, frontotemporal dementia, and prion disease genes. We identified 3 PSEN1 and 2 PSEN2 variants. Three variants, 1 in PSEN1 (p.H21Profs*2) and both PSEN2 (p.A415S and p.M174I), were novel and absent in control exomes. These novel variants can be classified as probable pathogenic, except for PSEN1 (p.H21Profs*2) in which the pathogenicity is uncertain. The initial clinical symptoms between mutation carriers varied from behavioral problems to memory impairment. Our findings extend the mutation spectrum of EOAD and underline the clinical heterogeneity among PSEN1 and PSEN2 mutation carriers. Screening for Alzheimer's disease–causing genes is indicated in presenile dementia with an overlapping clinical diagnosis. Early-onset Alzheimer's disease Elsevier Exome sequencing Elsevier PSEN2 Elsevier PSEN1 Elsevier Seelaar, Harro oth Melhem, Shamiram oth Rozemuller, Annemieke J.M. oth van Swieten, John C. oth Enthalten in Elsevier Science Zidane, Mustapha ELSEVIER Corrigendum to “Electrical and thermal transport properties of Fe–Ni based ternary alloys in the earth's inner core: An ab initio study” [Physics of the Earth and Planetary Interiors 2021 Amsterdam [u.a.] (DE-627)ELV005660645 volume:86 year:2020 pages:2019-20114 extent:18096 https://doi.org/10.1016/j.neurobiolaging.2019.01.015 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-GGO SSG-OPC-GEO SSG-OPC-AST 38.70 Geophysik: Allgemeines VZ 39.53 Planeten VZ AR 86 2020 2019-20114 18096 86.2020, 201.e9-, (18096 S.) |
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10.1016/j.neurobiolaging.2019.01.015 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000891.pica (DE-627)ELV049193589 (ELSEVIER)S0197-4580(19)30029-6 DE-627 ger DE-627 rakwb eng 550 520 VZ 38.70 bkl 39.53 bkl Wong, Tsz Hang verfasserin aut Genetic screening in early-onset Alzheimer's disease identified three novel presenilin mutations 2020transfer abstract 18096 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Mutations in presenilin 1 (PSEN1), presenilin 2 (PSEN2), and amyloid precursor protein (APP) are major genetic causes of early-onset Alzheimer's disease (EOAD). Clinical heterogeneity is frequently observed in patients with PSEN1 and PSEN2 mutations. Using whole exome sequencing, we screened a Dutch cohort of 68 patients with EOAD for rare variants in Mendelian Alzheimer's disease, frontotemporal dementia, and prion disease genes. We identified 3 PSEN1 and 2 PSEN2 variants. Three variants, 1 in PSEN1 (p.H21Profs*2) and both PSEN2 (p.A415S and p.M174I), were novel and absent in control exomes. These novel variants can be classified as probable pathogenic, except for PSEN1 (p.H21Profs*2) in which the pathogenicity is uncertain. The initial clinical symptoms between mutation carriers varied from behavioral problems to memory impairment. Our findings extend the mutation spectrum of EOAD and underline the clinical heterogeneity among PSEN1 and PSEN2 mutation carriers. Screening for Alzheimer's disease–causing genes is indicated in presenile dementia with an overlapping clinical diagnosis. Mutations in presenilin 1 (PSEN1), presenilin 2 (PSEN2), and amyloid precursor protein (APP) are major genetic causes of early-onset Alzheimer's disease (EOAD). Clinical heterogeneity is frequently observed in patients with PSEN1 and PSEN2 mutations. Using whole exome sequencing, we screened a Dutch cohort of 68 patients with EOAD for rare variants in Mendelian Alzheimer's disease, frontotemporal dementia, and prion disease genes. We identified 3 PSEN1 and 2 PSEN2 variants. Three variants, 1 in PSEN1 (p.H21Profs*2) and both PSEN2 (p.A415S and p.M174I), were novel and absent in control exomes. These novel variants can be classified as probable pathogenic, except for PSEN1 (p.H21Profs*2) in which the pathogenicity is uncertain. The initial clinical symptoms between mutation carriers varied from behavioral problems to memory impairment. Our findings extend the mutation spectrum of EOAD and underline the clinical heterogeneity among PSEN1 and PSEN2 mutation carriers. Screening for Alzheimer's disease–causing genes is indicated in presenile dementia with an overlapping clinical diagnosis. Early-onset Alzheimer's disease Elsevier Exome sequencing Elsevier PSEN2 Elsevier PSEN1 Elsevier Seelaar, Harro oth Melhem, Shamiram oth Rozemuller, Annemieke J.M. oth van Swieten, John C. oth Enthalten in Elsevier Science Zidane, Mustapha ELSEVIER Corrigendum to “Electrical and thermal transport properties of Fe–Ni based ternary alloys in the earth's inner core: An ab initio study” [Physics of the Earth and Planetary Interiors 2021 Amsterdam [u.a.] (DE-627)ELV005660645 volume:86 year:2020 pages:2019-20114 extent:18096 https://doi.org/10.1016/j.neurobiolaging.2019.01.015 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-GGO SSG-OPC-GEO SSG-OPC-AST 38.70 Geophysik: Allgemeines VZ 39.53 Planeten VZ AR 86 2020 2019-20114 18096 86.2020, 201.e9-, (18096 S.) |
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Genetic screening in early-onset Alzheimer's disease identified three novel presenilin mutations |
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Mutations in presenilin 1 (PSEN1), presenilin 2 (PSEN2), and amyloid precursor protein (APP) are major genetic causes of early-onset Alzheimer's disease (EOAD). Clinical heterogeneity is frequently observed in patients with PSEN1 and PSEN2 mutations. Using whole exome sequencing, we screened a Dutch cohort of 68 patients with EOAD for rare variants in Mendelian Alzheimer's disease, frontotemporal dementia, and prion disease genes. We identified 3 PSEN1 and 2 PSEN2 variants. Three variants, 1 in PSEN1 (p.H21Profs*2) and both PSEN2 (p.A415S and p.M174I), were novel and absent in control exomes. These novel variants can be classified as probable pathogenic, except for PSEN1 (p.H21Profs*2) in which the pathogenicity is uncertain. The initial clinical symptoms between mutation carriers varied from behavioral problems to memory impairment. Our findings extend the mutation spectrum of EOAD and underline the clinical heterogeneity among PSEN1 and PSEN2 mutation carriers. Screening for Alzheimer's disease–causing genes is indicated in presenile dementia with an overlapping clinical diagnosis. |
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Mutations in presenilin 1 (PSEN1), presenilin 2 (PSEN2), and amyloid precursor protein (APP) are major genetic causes of early-onset Alzheimer's disease (EOAD). Clinical heterogeneity is frequently observed in patients with PSEN1 and PSEN2 mutations. Using whole exome sequencing, we screened a Dutch cohort of 68 patients with EOAD for rare variants in Mendelian Alzheimer's disease, frontotemporal dementia, and prion disease genes. We identified 3 PSEN1 and 2 PSEN2 variants. Three variants, 1 in PSEN1 (p.H21Profs*2) and both PSEN2 (p.A415S and p.M174I), were novel and absent in control exomes. These novel variants can be classified as probable pathogenic, except for PSEN1 (p.H21Profs*2) in which the pathogenicity is uncertain. The initial clinical symptoms between mutation carriers varied from behavioral problems to memory impairment. Our findings extend the mutation spectrum of EOAD and underline the clinical heterogeneity among PSEN1 and PSEN2 mutation carriers. Screening for Alzheimer's disease–causing genes is indicated in presenile dementia with an overlapping clinical diagnosis. |
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Mutations in presenilin 1 (PSEN1), presenilin 2 (PSEN2), and amyloid precursor protein (APP) are major genetic causes of early-onset Alzheimer's disease (EOAD). Clinical heterogeneity is frequently observed in patients with PSEN1 and PSEN2 mutations. Using whole exome sequencing, we screened a Dutch cohort of 68 patients with EOAD for rare variants in Mendelian Alzheimer's disease, frontotemporal dementia, and prion disease genes. We identified 3 PSEN1 and 2 PSEN2 variants. Three variants, 1 in PSEN1 (p.H21Profs*2) and both PSEN2 (p.A415S and p.M174I), were novel and absent in control exomes. These novel variants can be classified as probable pathogenic, except for PSEN1 (p.H21Profs*2) in which the pathogenicity is uncertain. The initial clinical symptoms between mutation carriers varied from behavioral problems to memory impairment. Our findings extend the mutation spectrum of EOAD and underline the clinical heterogeneity among PSEN1 and PSEN2 mutation carriers. Screening for Alzheimer's disease–causing genes is indicated in presenile dementia with an overlapping clinical diagnosis. |
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