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Rudenskaya GE, Petukhova MS, Zabnenkova VV, Cherevatova TB, Ryzhkova OP. [Early-onset familial Alzheimer's disease with spastic paraparesis associated with PSEN1 gene]. Zh Nevrol Psikhiatr Im S S Korsakova 2023; 123:120-127. [PMID: 37994898 DOI: 10.17116/jnevro2023123111120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2023]
Abstract
A familial case of a rare autosomal dominant Alzheimer's disease (AD), related to PSEN1 gene (AD3, OMIM 607822), differing from common multifactorial form by earlier onset and, in part of cases, by accompanying neurological signs, spastic paraparesis particularly, is presented. The first sign in a female proband and in her son was paraparesis manifested at the age of 29 and 21 years, respectively. Cognitive disturbances developed soon; the former diagnosis was hereditary spastic paraplegia with cognitive impairment, In the proband examined in 2008 at 33 years old the diagnosis was not established. In the son examined in 2022 at 27 years old whole-exome sequencing detected a novel PSEN1 missense mutation p.Thr421Ala. The mutation was confirmed by Sanger sequencing in him, found out in the proband (who was severely disabled by that time) and excluded in her unaffected mother. Except for different age of onset, AD3 in two patients was similar, though in whole it is variable, also in relatives. The variability and rareness of the disease hampers clinical diagnostics. Massive parallel sequencing is a most reliable diagnostic method.
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Affiliation(s)
| | - M S Petukhova
- Research Centre for Medical Genetics, Moscow, Russia
| | | | | | - O P Ryzhkova
- Research Centre for Medical Genetics, Moscow, Russia
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Willumsen N, Arber C, Lovejoy C, Toombs J, Alatza A, Weston PSJ, Chávez-Gutiérrez L, Hardy J, Zetterberg H, Fox NC, Ryan NS, Lashley T, Wray S. The PSEN1 E280G mutation leads to increased amyloid-β43 production in induced pluripotent stem cell neurons and deposition in brain tissue. Brain Commun 2022; 5:fcac321. [PMID: 36687397 PMCID: PMC9847549 DOI: 10.1093/braincomms/fcac321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 09/06/2022] [Accepted: 12/05/2022] [Indexed: 12/13/2022] Open
Abstract
Mutations in the presenilin 1 gene, PSEN1, which cause familial Alzheimer's disease alter the processing of amyloid precursor protein, leading to the generation of various amyloid-β peptide species. These species differ in their potential for aggregation. Mutation-specific amyloid-β peptide profiles may thereby influence pathogenicity and clinical heterogeneity. There is particular interest in comparing mutations with typical and atypical clinical presentations, such as E280G. We generated PSEN1 E280G mutation induced pluripotent stem cells from two patients and differentiated them into cortical neurons, along with previously reported PSEN1 M146I, PSEN1 R278I and two control lines. We assessed both the amyloid-β peptide profiles and presenilin 1 protein maturity. We also compared amyloid-β peptide profiles in human post-mortem brain tissue from cases with matched mutations. Amyloid-β ratios significantly differed compared with controls and between different patients, implicating mutation-specific alterations in amyloid-β ratios. Amyloid-β42:40 was increased in the M146I and both E280G lines compared with controls. Amyloid-β42:40 was not increased in the R278I line compared with controls. The amyloid-β43:40 ratio was increased in R278I and both E280G lines compared with controls, but not in M146I cells. Distinct amyloid-β peptide patterns were also observed in human brain tissue from individuals with these mutations, showing some similar patterns to cell line observations. Reduced presenilin 1 maturation was observed in neurons with the PSEN1 R278I and E280G mutations, but not the M146I mutation. These results suggest that mutation location can differentially alter the presenilin 1 protein and affect its autoendoproteolysis and processivity, contributing to the pathological phenotype. Investigating differences in underlying molecular mechanisms of familial Alzheimer's disease may inform our understanding of clinical heterogeneity.
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Affiliation(s)
- Nanet Willumsen
- Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London WC1N 1PJ, UK
- The Queen Square Brain Bank for Neurological Disorders, Department of Clinical and Movement Neuroscience, UCL Queen Square Institute of Neurology, London WC1N 1PJ, UK
| | - Charles Arber
- Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London WC1N 1PJ, UK
| | - Christopher Lovejoy
- Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London WC1N 1PJ, UK
| | - Jamie Toombs
- Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London WC1N 1PJ, UK
- UK Dementia Research Institute, University College London, London WC1E 6AU, UK
| | - Argyro Alatza
- Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London WC1N 1PJ, UK
| | - Philip S J Weston
- Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London WC1N 1PJ, UK
- Dementia Research Centre, UCL Queen Square Institute of Neurology, London WC1E 6BT, UK
| | - Lucia Chávez-Gutiérrez
- VIB Center for Brain and Disease Research, 3000 Leuven, Belgium
- Department of Neurology, KU Leuven, 3000 Leuven, Belgium
| | - John Hardy
- Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London WC1N 1PJ, UK
- UK Dementia Research Institute, University College London, London WC1E 6AU, UK
| | - Henrik Zetterberg
- Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London WC1N 1PJ, UK
- UK Dementia Research Institute, University College London, London WC1E 6AU, UK
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy at University of Gothenburg, S-431 80 Mölndal, Sweden
| | - Nick C Fox
- Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London WC1N 1PJ, UK
- Dementia Research Centre, UCL Queen Square Institute of Neurology, London WC1E 6BT, UK
- UK Dementia Research Institute, University College London, London WC1E 6AU, UK
| | - Natalie S Ryan
- Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London WC1N 1PJ, UK
- Dementia Research Centre, UCL Queen Square Institute of Neurology, London WC1E 6BT, UK
- UK Dementia Research Institute, University College London, London WC1E 6AU, UK
| | - Tammaryn Lashley
- Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London WC1N 1PJ, UK
- The Queen Square Brain Bank for Neurological Disorders, Department of Clinical and Movement Neuroscience, UCL Queen Square Institute of Neurology, London WC1N 1PJ, UK
| | - Selina Wray
- Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London WC1N 1PJ, UK
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Dehghani N, Bras J, Guerreiro R. How understudied populations have contributed to our understanding of Alzheimer's disease genetics. Brain 2021; 144:1067-1081. [PMID: 33889936 DOI: 10.1093/brain/awab028] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 10/30/2020] [Accepted: 11/17/2020] [Indexed: 12/14/2022] Open
Abstract
The majority of genome-wide association studies have been conducted using samples with a broadly European genetic background. As a field, we acknowledge this limitation and the need to increase the diversity of populations studied. A major challenge when designing and conducting such studies is to assimilate large samples sizes so that we attain enough statistical power to detect variants associated with disease, particularly when trying to identify variants with low and rare minor allele frequencies. In this review, we aimed to illustrate the benefits to genetic characterization of Alzheimer's disease, in researching currently understudied populations. This is important for both fair representation of world populations and the translatability of findings. To that end, we conducted a literature search to understand the contributions of studies, on different populations, to Alzheimer's disease genetics. Using both PubMed and Alzforum Mutation Database, we systematically quantified the number of studies reporting variants in known disease-causing genes, in a worldwide manner, and discuss the contributions of research in understudied populations to the identification of novel genetic factors in this disease. Additionally, we compared the effects of genome-wide significant single nucleotide polymorphisms across populations by focusing on loci that show different association profiles between populations (a key example being APOE). Reports of variants in APP, PSEN1 and PSEN2 can initially determine whether patients from a country have been studied for Alzheimer's disease genetics. Most genome-wide significant associations in non-Hispanic white genome-wide association studies do not reach genome-wide significance in such studies of other populations, with some suggesting an opposite effect direction; this is likely due to much smaller sample sizes attained. There are, however, genome-wide significant associations first identified in understudied populations which have yet to be replicated. Familial studies in understudied populations have identified rare, high effect variants, which have been replicated in other populations. This work functions to both highlight how understudied populations have furthered our understanding of Alzheimer's disease genetics, and to help us gauge our progress in understanding the genetic architecture of this disease in all populations.
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Affiliation(s)
- Nadia Dehghani
- Department of Neurodegenerative Science, Van Andel Institute, Grand Rapids, Michigan, USA
| | - Jose Bras
- Department of Neurodegenerative Science, Van Andel Institute, Grand Rapids, Michigan, USA.,Division of Psychiatry and Behavioral Medicine, Michigan State University College of Human Medicine, Grand Rapids, MI, USA
| | - Rita Guerreiro
- Department of Neurodegenerative Science, Van Andel Institute, Grand Rapids, Michigan, USA.,Division of Psychiatry and Behavioral Medicine, Michigan State University College of Human Medicine, Grand Rapids, MI, USA
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Miki T, Yokota O, Haraguchi T, Ikeuchi T, Zhu B, Takenoshita S, Terada S, Yamada N. Young adult-onset, very slowly progressive cognitive decline with spastic paraparesis in Alzheimer's disease with cotton wool plaques due to a novel presenilin1 G417S mutation. Acta Neuropathol Commun 2019; 7:19. [PMID: 30755281 PMCID: PMC6371429 DOI: 10.1186/s40478-019-0672-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 01/31/2019] [Indexed: 02/18/2023] Open
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Lam B, Khan A, Keith J, Rogaeva E, Bilbao J, St. George‐Hyslop P, Ghani M, Freedman M, Stuss DT, Chow T, Black SE, Masellis M. Characterizing familial corticobasal syndrome due to Alzheimer's disease pathology and
PSEN1
mutations. Alzheimers Dement 2016; 13:520-530. [DOI: 10.1016/j.jalz.2016.08.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 08/08/2016] [Accepted: 08/17/2016] [Indexed: 12/13/2022]
Affiliation(s)
- Benjamin Lam
- L.C. Campbell Cognitive Neurology Research Unit, Sunnybrook Health Sciences Centre University of Toronto Toronto Ontario 33
- Brain Sciences Research Program, Sunnybrook Research Institute University of Toronto Toronto Ontario Canada
- Division of Neurology, Department of Medicine University of Toronto Toronto Ontario Canada
| | - Aun Khan
- Ziauddin University Karachi Pakistan
| | - Julia Keith
- Department of Anatomical Pathology, Sunnybrook Health Sciences Centre University of Toronto Toronto Ontario Canada
| | - Ekaterina Rogaeva
- Tanz Centre for Research in Neurodegenerative Disease Toronto Ontario Canada
| | - Juan Bilbao
- Department of Anatomical Pathology, Sunnybrook Health Sciences Centre University of Toronto Toronto Ontario Canada
| | - Peter St. George‐Hyslop
- Tanz Centre for Research in Neurodegenerative Disease Toronto Ontario Canada
- Cambridge Institute for Medical Research, Department of Clinical Neurosciences University of Cambridge Cambridge UK
| | - Mahdi Ghani
- Tanz Centre for Research in Neurodegenerative Disease Toronto Ontario Canada
| | - Morris Freedman
- Division of Neurology, Department of Medicine University of Toronto Toronto Ontario Canada
- Sam and Ida Ross Memory Clinic Baycrest Toronto Ontario Canada
- Rotman Research Institute, Baycrest University of Toronto Toronto Ontario Canada
- Toronto Dementia Research Alliance Toronto Ontario Canada
| | - Donald T. Stuss
- Brain Sciences Research Program, Sunnybrook Research Institute University of Toronto Toronto Ontario Canada
- Division of Neurology, Department of Medicine University of Toronto Toronto Ontario Canada
- Rotman Research Institute, Baycrest University of Toronto Toronto Ontario Canada
- Department of Psychology University of Toronto Toronto Ontario Canada
- Ontario Brain Institute Toronto Ontario Canada
| | - Tiffany Chow
- Division of Neurology, Department of Medicine University of Toronto Toronto Ontario Canada
- Sam and Ida Ross Memory Clinic Baycrest Toronto Ontario Canada
- Rotman Research Institute, Baycrest University of Toronto Toronto Ontario Canada
| | - Sandra E. Black
- L.C. Campbell Cognitive Neurology Research Unit, Sunnybrook Health Sciences Centre University of Toronto Toronto Ontario 33
- Brain Sciences Research Program, Sunnybrook Research Institute University of Toronto Toronto Ontario Canada
- Division of Neurology, Department of Medicine University of Toronto Toronto Ontario Canada
- Rotman Research Institute, Baycrest University of Toronto Toronto Ontario Canada
- Toronto Dementia Research Alliance Toronto Ontario Canada
| | - Mario Masellis
- L.C. Campbell Cognitive Neurology Research Unit, Sunnybrook Health Sciences Centre University of Toronto Toronto Ontario 33
- Brain Sciences Research Program, Sunnybrook Research Institute University of Toronto Toronto Ontario Canada
- Division of Neurology, Department of Medicine University of Toronto Toronto Ontario Canada
- Toronto Dementia Research Alliance Toronto Ontario Canada
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Zhang S, Lei C, Liu P, Zhang M, Tao W, Liu H, Liu M. Association between variant amyloid deposits and motor deficits in FAD-associated presenilin-1 mutations: A systematic review. Neurosci Biobehav Rev 2015; 56:180-92. [DOI: 10.1016/j.neubiorev.2015.07.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 06/20/2015] [Accepted: 07/06/2015] [Indexed: 01/16/2023]
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Riudavets MA, Bartoloni L, Troncoso JC, Pletnikova O, St. George‐Hyslop P, Schultz M, Sevlever G, Allegri RF. Familial dementia with frontotemporal features associated with M146V presenilin-1 mutation. Brain Pathol 2013; 23:595-600. [PMID: 23489366 PMCID: PMC4007155 DOI: 10.1111/bpa.12051] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Accepted: 03/02/2013] [Indexed: 12/28/2022] Open
Abstract
Most of the mutations in the presenilin-1 gene (PS-1) are associated with familial Alzheimer's disease (AD). However, certain examples can be associated with frontotemporal dementia (FTD). We performed a clinical evaluation of individuals belonging to a family with the FTD phenotype, and additional molecular studies and neuropathological assessment of the proband. The PS-1 M146V mutation was found in the 50-year-old subject (the proband) with family history of early-onset FTD. Neuropathological examination showed abundant amyloid plaques, widespread neurofibrillary pathology, Pick bodies in the hippocampus and cortex, cortical globose tangles and ubiquitin-positive nuclear inclusions in white matter oligodendrocytes. We report a kindred with clinical features of FTD, whose proband bore the PS-1 M146V mutation and showed diffuse Alzheimer's type pathology and Pick bodies on post-mortem neuropathological examination. As with other mutations within the same codon, this substitution may predispose to both diseases by affecting APP and/or tau processing.
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Affiliation(s)
| | - Leonardo Bartoloni
- Department of Internal MedicineHospital ZubizarretaBuenos AiresArgentina
| | - Juan C. Troncoso
- Neuropathology DivisionPathology DepartmentJohns Hopkins University School of MedicineBaltimoreMD
| | - Olga Pletnikova
- Neuropathology DivisionPathology DepartmentJohns Hopkins University School of MedicineBaltimoreMD
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8
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Variant Alzheimer's disease with spastic paraparesis and supranuclear gaze palsy. Can J Neurol Sci 2013; 40:249-51. [PMID: 23419577 DOI: 10.1017/s0317167100013822] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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9
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Variant Alzheimer disease with spastic paraparesis: a rare presenilin-1 mutation. Can J Neurol Sci 2011; 38:659-61. [PMID: 21672709 DOI: 10.1017/s0317167100012233] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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10
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Nelson O, Supnet C, Liu H, Bezprozvanny I. Familial Alzheimer's disease mutations in presenilins: effects on endoplasmic reticulum calcium homeostasis and correlation with clinical phenotypes. J Alzheimers Dis 2011; 21:781-93. [PMID: 20634584 DOI: 10.3233/jad-2010-100159] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Mutations in presenilins 1 and 2 (PS1 and PS2) are responsible for approximately 40% of all early onset familial Alzheimer's disease (FAD) monogenic cases. Presenilins (PSs) function as the catalytic subunit of γ-secretase and support cleavage of the amyloid-β protein precursor (AβPP). We previously discovered that PSs also function as passive endoplasmic reticulum (ER) calcium (Ca2+) leak channels and that most FAD mutations in PSs affected their ER Ca2+ leak function. To further validate the relevance of our findings to human disease, we here performed Ca2+ imaging experiments with lymphoblasts established from FAD patients. We discovered that most FAD mutations in PSs disrupted ER Ca2+ leak function and resulted in increased ER Ca2+ pool in human lymphoblasts. However, we found that a subset of PS1 FAD mutants supported ER Ca2+ leak activity, as ER Ca2+ pool was unaffected in lymphoblasts. Most of the "functional" mutations for ER Ca2+ leak were clustered in the exon 8-9 area of PSEN1 gene and segregated with the cotton wool plaques and spastic paraparesis clinical phenotype occasionally observed in PS1 FAD patients. Our findings with the "functional" and "non-functional" PS1 FAD mutants were confirmed in Ca2+ rescue experiments with PS double-knockout mouse embryonic fibroblasts. Based on the combined effects of the PS1 FAD mutations on ER Ca2+ leak and γ-secretase activities we propose a model that explains the heterogeneity observed in FAD. The proposed model has implications for understanding the pathogenesis of both familial and sporadic AD.
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Affiliation(s)
- Omar Nelson
- Department of Physiology, UT Southwestern Medical Center at Dallas, Dallas, Texas 75390-9040, USA
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Trancikova A, Ramonet D, Moore DJ. Genetic Mouse Models of Neurodegenerative Diseases. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2011; 100:419-82. [DOI: 10.1016/b978-0-12-384878-9.00012-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Abstract
Presenilins form the catalytic part of the gamma-secretases, protein complexes that are responsible for the intramembranous cleavage of transmembrane proteins. The presenilins are involved in several biological functions, but are best known for their role in the generation of the beta-amyloid (Abeta) peptide in Alzheimer's disease and are therefore thought to be important drug targets for this disorder. Mutations in the presenilin genes cause early-onset familial Alzheimer's disease, but mutation carriers have substantial phenotypic heterogeneity. Recent evidence implicating presenilin mutations in non-Alzheimer's dementias, including frontotemporal dementia and Lewy body dementia, warrants further investigation. An increased understanding of the diversity of the molecular cell biology of the gamma-secretase complex and the effects of clinical mutations in the presenilin genes might help pave the way for improved development of drugs that are designed to target gamma-secretase enzymatic activity in Alzheimer's disease and potentially in other neurological diseases.
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Affiliation(s)
- Bruno A Bergmans
- Department of Molecular and Developmental Genetics, VIB, Leuven, Belgium; Center for Human Genetics, Katholieke Universiteit Leuven, Leuven, Belgium
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Martikainen P, Pikkarainen M, Pöntynen K, Hiltunen M, Lehtovirta M, Tuisku S, Soininen H, Alafuzoff I. Brain pathology in three subjects from the same pedigree with presenilin-1 (PSEN1) P264L mutation. Neuropathol Appl Neurobiol 2010; 36:41-54. [DOI: 10.1111/j.1365-2990.2009.01046.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Karlstrom H, Brooks WS, Kwok JBJ, Broe GA, Kril JJ, McCann H, Halliday GM, Schofield PR. Variable phenotype of Alzheimer's disease with spastic paraparesis. J Neurochem 2007; 104:573-83. [PMID: 17995932 DOI: 10.1111/j.1471-4159.2007.05038.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Pedigrees with familial Alzheimer's disease (AD) show considerable phenotypic variability. Spastic paraparesis (SP), or progressive spasticity of the lower limbs is frequently hereditary and exists either as uncomplicated (paraparesis alone) or complicated (paraparesis and other neurological features) disease subtypes. In some AD families, with presenilin-1 (PSEN1) mutations, affected individuals also have SP. These PSEN1 AD pedigrees frequently have a distinctive and variant neuropathology, namely large, non-cored plaques without neuritic dystrophy called cotton wool plaques (CWP). The PSEN1 AD mutations giving rise to CWP produce unusually high levels of the amyloid beta peptide (Abeta) ending at position 42 or 43, and the main component of CWP is amino-terminally truncated forms of amyloid beta peptide starting after the alternative beta-secretase cleavage site at position 11. This suggests a molecular basis for the formation of CWP and an association with both SP and AD. The SP phenotype in some PSEN1 AD pedigrees also appears to be associated with a delayed onset of dementia compared with affected individuals who present with dementia only, suggesting the existence of a protective factor in some individuals with SP. Variations in neuropathology and neurological symptoms in PSEN1 AD raise the prospect that modifier genes may underlie this phenotypic heterogeneity.
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Affiliation(s)
- Helena Karlstrom
- Garvan Institute of Medical Research, Sydney, Australia, and Karolinska Institutet, Stockholm, Sweden
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Karlstrom H, Kwok JBJ, Gregory GC, Hallupp M, Brooks WS, Schofield PR. No association of spastic paraparesis genes in PSEN1 Alzheimer's disease with spastic paraparesis. Neuroreport 2007; 18:1267-9. [PMID: 17632280 DOI: 10.1097/wnr.0b013e3282405209] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Familial Alzheimer's disease due to presenilin 1 (PSEN1) mutations shows considerable phenotypic variability with differences in neuropathology and neurological symptoms. Spastic paraparesis is a common neurological phenotype associated with Alzheimer's disease arising from PSEN1 mutations. To investigate whether known genes that cause spastic paraparesis could act as Alzheimer's disease-modifier genes, we sequenced nine spastic paraparesis genes in three Alzheimer's disease families with PSEN1 exon 9 deletions. We did not observe any correlation of polymorphisms or mutations in the nine spastic paraparesis genes with the variable phenotype seen in families with Alzheimer's disease and spastic paraparesis. These results suggest a need for a continuing search for genes that cause the phenotypic variation in Alzheimer's disease and spastic paraparesis.
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Lazarov O, Morfini GA, Pigino G, Gadadhar A, Chen X, Robinson J, Ho H, Brady ST, Sisodia SS. Impairments in fast axonal transport and motor neuron deficits in transgenic mice expressing familial Alzheimer's disease-linked mutant presenilin 1. J Neurosci 2007; 27:7011-20. [PMID: 17596450 PMCID: PMC2801050 DOI: 10.1523/jneurosci.4272-06.2007] [Citation(s) in RCA: 107] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Presenilins (PS) play a central role in gamma-secretase-mediated processing of beta-amyloid precursor protein (APP) and numerous type I transmembrane proteins. Expression of mutant PS1 variants causes familial forms of Alzheimer's disease (FAD). In cultured mammalian cells that express FAD-linked PS1 variants, the intracellular trafficking of several type 1 membrane proteins is altered. We now report that the anterograde fast axonal transport (FAT) of APP and Trk receptors is impaired in the sciatic nerves of transgenic mice expressing two independent FAD-linked PS1 variants. Furthermore, FAD-linked PS1 mice exhibit a significant increase in phosphorylation of the cytoskeletal proteins tau and neurofilaments in the spinal cord. Reductions in FAT and phosphorylation abnormalities correlated with motor neuron functional deficits. Together, our data suggests that defects in anterograde FAT may underlie FAD-linked PS1-mediated neurodegeneration through a mechanism involving impairments in neurotrophin signaling and synaptic dysfunction.
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Affiliation(s)
- Orly Lazarov
- Department of Anatomy and Cell Biology, The University of Illinois at Chicago, Chicago, Illinois 60612, and
| | - Gerardo A. Morfini
- Department of Anatomy and Cell Biology, The University of Illinois at Chicago, Chicago, Illinois 60612, and
| | - Gustavo Pigino
- Department of Anatomy and Cell Biology, The University of Illinois at Chicago, Chicago, Illinois 60612, and
| | - Archana Gadadhar
- Department of Anatomy and Cell Biology, The University of Illinois at Chicago, Chicago, Illinois 60612, and
| | | | - John Robinson
- Neurobiology, The University of Chicago, Chicago, Illinois 60637
| | | | - Scott T. Brady
- Department of Anatomy and Cell Biology, The University of Illinois at Chicago, Chicago, Illinois 60612, and
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Matsui M, Kawarai T, Hase Y, Tomimoto H, Iseki K, Rogaeva E, Orlacchio A, Bernardi G, St George-Hyslop P, Takahashi R, Matsui M. A novel mutation in the SPG3A gene (atlastin) in hereditary spastic paraplegia. J Neurol 2007; 254:972-4. [PMID: 17380240 DOI: 10.1007/s00415-006-0446-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2006] [Revised: 09/28/2006] [Accepted: 10/18/2006] [Indexed: 10/23/2022]
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18
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Larner AJ, Doran M. Clinical phenotypic heterogeneity of Alzheimer's disease associated with mutations of the presenilin-1 gene. J Neurol 2005; 253:139-58. [PMID: 16267640 DOI: 10.1007/s00415-005-0019-5] [Citation(s) in RCA: 150] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2005] [Revised: 05/31/2005] [Accepted: 06/13/2005] [Indexed: 10/25/2022]
Abstract
It is now 10 years since the first report of mutations in the presenilin genes that were deterministic for familial autosomal dominant Alzheimer's disease. The most common of these mutations occurs in the presenilin-1 gene (PSEN1) located on chromosome 14. In the ensuing decade, more than 100 PSEN1 mutations have been described. The emphasis of these reports has largely been on the novelty of the mutations and their potential pathogenic consequences rather than detailed clinical, neuropsychological, neuroimaging and neuropathological accounts of patients with the mutation. This article reviews the clinical phenotypes of reported PSEN1 mutations, emphasizing their heterogeneity, and suggesting that other factors, both genetic and epigenetic,must contribute to disease phenotype.
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Affiliation(s)
- A J Larner
- Cognitive Function Clinic, Walton Centre for Neurology and Neurosurgery Fazakerley, Liverpool, UK.
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