1
|
Yang Y, Bagyinszky E, An SSA. Patient with PSEN1 Glu318Gly and Other Possible Disease Risk Mutations, Diagnosed with Early Onset Alzheimer's Disease. Int J Mol Sci 2023; 24:15461. [PMID: 37895139 PMCID: PMC10607718 DOI: 10.3390/ijms242015461] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 10/10/2023] [Accepted: 10/18/2023] [Indexed: 10/29/2023] Open
Abstract
In this manuscript, we introduced a French EOAD patient in Korea who carried the presenilin-1 (PSEN1) Glu318Gly mutations with four possible risk variants, including sortilin-related receptor 1 (SORL1) Glu270Lys, ATP-binding cassette subfamily A member 7 (ABCA7) Val1946Met, translocase of outer mitochondrial membrane 40 (TOMM40) Arg239Trp, and granulin (GRN) Ala505Gly. The patient started to present memory decline and behavioral dysfunction in his early 60s. His brain imaging presented amyloid deposits by positron emission tomography (PET-CT). The multimer detection system (MDS) screening test for plasma for amyloid oligomers was also positive, which supported the AD diagnosis. It was verified that PSEN1 Glu318Gly itself may not impact amyloid production. However, additional variants were found in other AD and non-AD risk genes, as follows: SORL1 Glu270Lys was suggested as a risk mutation for AD and could increase amyloid peptide production and impair endosome functions. ABCA7 Val1946Met was a novel variant that was predicted to be damaging. The GRN Ala505Gly was a variant with uncertain significance; however, it may reduce the granulin levels in the plasma of dementia patients. Pathway analysis revealed that PSEN1 Glu318Gly may work as a risk factor along with the SORL1 and ABCA7 variants since pathway analysis revealed that PSEN1 could directly interact with them through amyloid-related and lipid metabolism pathways. TOMM40 and PSEN1 could have common mechanisms through mitochondrial dysfunction. It may be possible that PSEN1 Glu318Gly and GRN Ala505Gly would impact disease by impairing immune-related pathways, including microglia and astrocyte development, or NFkB-related pathways. Taken together, the five risk factors may contribute to disease-related pathways, including amyloid and lipid metabolism, or impair immune mechanisms.
Collapse
Affiliation(s)
- YoungSoon Yang
- Department of Neurology, Soonchunhyang University College of Medicine, Cheonan Hospital, Cheonan 31151, Republic of Korea;
| | - Eva Bagyinszky
- Department of Industrial and Environmental Engineering, Graduate School of Environment, Gachon University, Seongnam-si 13120, Republic of Korea
| | - Seong Soo A. An
- Department of Bionano Technology, Gachon Medical Research Institute, College of Bionano Technology, Gachon University, Seongnam-si 13120, Republic of Korea
| |
Collapse
|
2
|
Wang Z, Bai Y, Härdle WK, Tian M. Smoothed quantile regression for partially functional linear models in high dimensions. Biom J 2023; 65:e2200060. [PMID: 37147793 DOI: 10.1002/bimj.202200060] [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] [Received: 02/26/2022] [Revised: 11/21/2022] [Accepted: 12/11/2022] [Indexed: 05/07/2023]
Abstract
Practitioners of current data analysis are regularly confronted with the situation where the heavy-tailed skewed response is related to both multiple functional predictors and high-dimensional scalar covariates. We propose a new class of partially functional penalized convolution-type smoothed quantile regression to characterize the conditional quantile level between a scalar response and predictors of both functional and scalar types. The new approach overcomes the lack of smoothness and severe convexity of the standard quantile empirical loss, considerably improving the computing efficiency of partially functional quantile regression. We investigate a folded concave penalized estimator for simultaneous variable selection and estimation by the modified local adaptive majorize-minimization (LAMM) algorithm. The functional predictors can be dense or sparse and are approximated by the principal component basis. Under mild conditions, the consistency and oracle properties of the resulting estimators are established. Simulation studies demonstrate a competitive performance against the partially functional standard penalized quantile regression. A real application using Alzheimer's Disease Neuroimaging Initiative data is utilized to illustrate the practicality of the proposed model.
Collapse
Affiliation(s)
- Zhihao Wang
- Center for Applied Statistics, School of Statistics, Renmin University of China, Beijing, P. R. China
- School of Statistics and Data Science, Xinjiang University of Finance and Economics, Urumqi, P. R. China
| | - Yongxin Bai
- School of Science, Beijing Information Science and Technology University, Beijing, P. R. China
| | - Wolfgang K Härdle
- School of Business and Economics, Humboldt-Universität Zu Berlin, Berlin, Germany
- Department of Information Management and Finance, National Yang Ming Chiao Tung University (NYCU), Hsinchu City, Taiwan
| | - Maozai Tian
- Center for Applied Statistics, School of Statistics, Renmin University of China, Beijing, P. R. China
- School of Statistics and Data Science, Xinjiang University of Finance and Economics, Urumqi, P. R. China
| |
Collapse
|
3
|
Safadi D, Cohen OS, Chapman J, Rosenmann H, Nitsan Z, Kahan E, Appel S, Alkrenawi M. The epidemiological and clinical characteristics of patients with young-onset genetic Creutzfeldt-Jakob disease. Neurol Res 2023; 45:854-857. [PMID: 37165675 DOI: 10.1080/01616412.2023.2212210] [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] [Received: 09/15/2022] [Accepted: 05/01/2023] [Indexed: 05/12/2023]
Abstract
OBJECTIVES The onset of Creutzfeldt-Jakob disease (CJD) is usually around the age of 60, but younger patients have been described as well. Our study characterizes the demographic and clinical features of young-onset CJD patients. METHODS The CJD Israeli National Database was reviewed, and the patients were divided into groups of young (<40-year-old) (Y|) and older disease onset (>40-year-old) (O). Each group was further divided into sporadic (sCJD) and genetic (gCJD) patients. Clinical and demographic parameters were compared between the groups. RESULTS The study included 731 patients (Y- 18 patients, O- 713 patients). MRI showed classical features more often in the older population (O-76.9%, Y-36%, p = 0.006). Rapidly progressive dementia as a presenting feature was more common in the older group (O = 58%, Y = 27.7%, p = 0.019) whereas cerebellar onset (gait instability, dysarthria) was more common in the younger group (O = 6.7%, Y = 27.7%, p = 0.036)). Among gCJD patients, rapidly progressive dementia was commonly seen in older patients (O = 54%, Y = 21% p = 0.008) whereas cerebellar symptoms were seen in young patients (O = 7%, Y = 30% p = 0.01) Typical MRI findings were seen in 37% of young people compared to 87% of older patients (p = 0.002). No significant differences were between young and older patients in the sCJD group. CONCLUSION Young-onset gCJD patients have unique disease features including less typical brain MRI changes, a lower prevalence of dementia, and a higher prevalence of cerebellar signs at disease onset.
Collapse
Affiliation(s)
- Daniel Safadi
- Department of Neurology, Barzilai University Medical Center, Ashkelon, Israel
| | - Oren S Cohen
- Department of Neurology, Assaf Harofeh Medical Center, Tsrifin, Israel
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Joab Chapman
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
- Department of Neurology, The Sagol Neuroscience Center, and Chaim Sheba Medical Center, Ramat gan
| | - Hanna Rosenmann
- Department of Neurology,The Agnes Ginges Center for Human Neurogenetics, Hadassa Hebrew University Medical Center, Jerusalem, Israel
| | - Zeev Nitsan
- Department of Neurology, Barzilai University Medical Center, Ashkelon, Israel
- Faculty of Health Sciences, Ben Gurion University of the Negev, Beer-Sheva, Israel
| | - Esther Kahan
- Department of Neurology, Barzilai University Medical Center, Ashkelon, Israel
- Faculty of Health Sciences, Ben Gurion University of the Negev, Beer-Sheva, Israel
| | - Shmuel Appel
- Department of Neurology, Barzilai University Medical Center, Ashkelon, Israel
| | - Marwan Alkrenawi
- Department of Neurology, Barzilai University Medical Center, Ashkelon, Israel
| |
Collapse
|
4
|
Kim DY, Shim KH, Bagyinszky E, An SSA. Prion Mutations in Republic of Republic of Korea, China, and Japan. Int J Mol Sci 2022; 24:ijms24010625. [PMID: 36614069 PMCID: PMC9820783 DOI: 10.3390/ijms24010625] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 12/16/2022] [Accepted: 12/21/2022] [Indexed: 12/31/2022] Open
Abstract
Prion gene (PRNP) mutations are associated with diverse disease phenotypes, including familiar Creutzfeldt-Jakob Disease (CJD), Gerstmann-Sträussler-Scheinker disease (GSS), and fatal familial insomnia (FFI). Interestingly, PRNP mutations have been reported in patients diagnosed with Alzheimer's disease, dementia with Lewy bodies, Parkinson's disease, and frontotemporal dementia. In this review, we describe prion mutations in Asian countries, including Republic of Republic of Korea, China, and Japan. Clinical phenotypes and imaging data related to these mutations have also been introduced in detail. Several prion mutations are specific to Asians and have rarely been reported in countries outside Asia. For example, PRNP V180I and M232R, which are rare in other countries, are frequently detected in Republic of Korea and Japan. PRNP T188K is common in China, and E200K is significantly more common among Libyan Jews in Israel. The A117V mutation has not been detected in any Asian population, although it is commonly reported among European GSS patients. In addition, V210I or octapeptide insertion is common among European CJD patients, but relatively rare among Asian patients. The reason for these differences may be geographical or ethical isolation. In terms of clinical phenotypes, V180I, P102L, and E200K present diverse clinical symptoms with disease duration, which could be due to other genetic and environmental influences. For example, rs189305274 in the ACO1 gene may be associated with neuroprotective effects in cases of V180I mutation, leading to longer disease survival. Additional neuroprotective variants may be possible in cases featuring the E200K mutation, such as KLKB1, KARS, NRXN2, LAMA3, or CYP4X1. E219K has been suggested to modify the disease course in cases featuring the P102L mutation, as it may result in the absence of prion protein-positive plaques in tissue stained with Congo red. However, these studies analyzed only a few patients and may be too preliminary. The findings need to be verified in studies with larger sample sizes or in other populations. It would be interesting to probe additional genetic factors that cause disease progression or act as neuroprotective factors. Further studies are needed on genetic modifiers working with prions and alterations from mutations.
Collapse
Affiliation(s)
- Dan Yeong Kim
- Department of Bionano Technology, Gachon University, Seongnam 13120, Republic of Korea
| | - Kyu Hwan Shim
- Department of Bionano Technology, Gachon University, Seongnam 13120, Republic of Korea
| | - Eva Bagyinszky
- Department of Industrial and Environmental Engineering, Graduate School of Environment, Gachon University, Seongnam 13120, Republic of Korea
- Correspondence: (E.B.); (S.S.A.A.)
| | - Seong Soo A. An
- Department of Bionano Technology, Gachon University, Seongnam 13120, Republic of Korea
- Correspondence: (E.B.); (S.S.A.A.)
| |
Collapse
|
5
|
Nagata T, Shinagawa S, Kobayashi N, Kondo K, Shigeta M. A case of V180I genetic mutation Creutzfeldt Jakob disease (CJD) with delusional misidentification as an initial symptom. Prion 2022; 16:7-13. [PMID: 34965177 PMCID: PMC9757407 DOI: 10.1080/19336896.2021.2017701] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
An 84-year-old woman who had been diagnosed as having dementia with Lewy body (DLB) upon initial examination exhibited cognitive impairments and person delusional misidentification (DMS): she transiently claimed that her spouse was a stranger. She was re-examined at the age of 89 years; her frequency of speech and activities of daily living had both decreased, leading to verbal communication difficulties complicated by sensory aphasia, and brain diffusion-weighted (DW) magnetic resonance imaging (MRI) showed cortical hyperintensities in some areas of both hemispheres. About 4 months later, the DW high-intensity areas were observed to have expanded into diffuse cortical areas. While the clinical features of Creutzfeldt Jakob disease (CJD) (myoclonus; ataxia; parkinsonism; rapidly progressive cognitive impairments; periodic sharp discharges on electroencephalograms) were not observed, a genetic analysis of the prion protein (PRNP) gene, which was performed because of a family history of dementia, revealed a V180I mutation (heterozygosis: valine/isoleucine) suggesting genetic CJD (g-CJD). Her activity progressively decreased, reaching akinetic mutism about 11 months after the re-examination. Finally, she suffered from severe bedsores and died from aspiration pneumonia at the age of 90 years. The present report describes the first case of person DMS as an initial neuropsychiatric symptom for V180I g-CJD; the typical long-term clinical symptoms of CJD were not observed in this patient. The inclusion of person DMS as an initial clinical symptom and the presence of expansive cortical hyperintensity areas may be useful for clinicians attempting to diagnosis V180I g-CJD in patients with elusive symptoms.
Collapse
Affiliation(s)
- Tomoyuki Nagata
- Department of Psychiatry, The Jikei University School of Medicine, Tokyo, Japan,Department of Psychiatry, Airanomori Hospital, Kagoshima, Japan,CONTACT Tomoyuki Nagata Department of Psychiatry, The Jikei University School of Medicine, 3-25-8 Nishishimbashi, Minato-ku, Tokyo105–8471Japan
| | | | - Nobuyuki Kobayashi
- Department of Virology, The Jikei University School of Medicine, Tokyo, Japan
| | - Kazuhiro Kondo
- Department of Virology, The Jikei University School of Medicine, Tokyo, Japan
| | - Masahiro Shigeta
- Department of Psychiatry, The Jikei University School of Medicine, Tokyo, Japan
| |
Collapse
|
6
|
Mechanistic Insights into the Neuroprotective Potential of Sacred Ficus Trees. Nutrients 2022; 14:nu14224731. [PMID: 36432418 PMCID: PMC9695857 DOI: 10.3390/nu14224731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 10/16/2022] [Accepted: 11/05/2022] [Indexed: 11/11/2022] Open
Abstract
Ficus religiosa (Bo tree or sacred fig) and Ficus benghalensis (Indian banyan) are of immense spiritual and therapeutic importance. Various parts of these trees have been investigated for their antioxidant, antimicrobial, anticonvulsant, antidiabetic, anti-inflammatory, analgesic, hepatoprotective, dermoprotective, and nephroprotective properties. Previous reviews of Ficus mostly discussed traditional usages, photochemistry, and pharmacological activities, though comprehensive reviews of the neuroprotective potential of these Ficus species extracts and/or their important phytocompounds are lacking. The interesting phytocompounds from these trees include many bengalenosides, carotenoids, flavonoids (leucopelargonidin-3-O-β-d-glucopyranoside, leucopelargonidin-3-O-α-l-rhamnopyranoside, lupeol, cetyl behenate, and α-amyrin acetate), flavonols (kaempferol, quercetin, myricetin), leucocyanidin, phytosterols (bergapten, bergaptol, lanosterol, β-sitosterol, stigmasterol), terpenes (α-thujene, α-pinene, β-pinene, α-terpinene, limonene, β-ocimene, β-bourbonene, β-caryophyllene, α-trans-bergamotene, α-copaene, aromadendrene, α-humulene, alloaromadendrene, germacrene, γ-cadinene, and δ-cadinene), and diverse polyphenols (tannin, wax, saponin, leucoanthocyanin), contributing significantly to their pharmacological effects, ranging from antimicrobial action to neuroprotection. This review presents extensive mechanistic insights into the neuroprotective potential, especially important phytochemicals from F. religiosa and F. benghalensis. Owing to the complex pathophysiology of neurodegenerative disorders (NDDs), the currently existing drugs merely alleviate the symptoms. Hence, bioactive compounds with potent neuroprotective effects through a multitarget approach would be of great interest in developing pharmacophores for the treatment of NDDs.
Collapse
|
7
|
PSEN2 Thr421Met Mutation in a Patient with Early Onset Alzheimer’s Disease. Int J Mol Sci 2022; 23:ijms232113331. [PMID: 36362122 PMCID: PMC9656741 DOI: 10.3390/ijms232113331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 10/20/2022] [Accepted: 10/22/2022] [Indexed: 11/06/2022] Open
Abstract
Presenilin-2 (PSEN2) mutation Thr421Met was identified from a 57-years old patient with early onset Alzheimer’s disease (EOAD) for the first time in Korea. Previously, this mutation was discovered in an EOAD patient in Japan without a change on amyloid production from the cellular study. Both Korean and Japanese patients developed the disease in their 50s. Memory loss was prominent in both cases, but no additional clinical information was available on the Japanese patient. Magnetic resonance imaging (MRI) images of the Korean patient revealed asymmetric atrophies in both temporo-parietal lobes. In addition, amyloid positron emission tomography (PET) also revealed amyloid deposits in the gray matter of the temporo-parietal lobes asymmetrically. PSEN2 Thr421 was conserved among a majority of vertebrates (such as zebras, elephants, and giant pandas); hence, Thr421 could play an important role in its functions and any mutations could cause detrimental ramifications in its interactions. Interestingly, PSEN2 Thr421 could have homology with PSEN1 Thr440, as PSEN1 T440del mutations were reported from patients with AD or dementia with Lewy bodies. Hence, the changed amino acid from threonine to methionine of PSEN2 Thr421 could cause significant structural alterations in causing local protein dynamics, leading to its pathogenicity in EOAD. Lastly, PSEN2 Thr421Met may interact with other mutations in neurodegenerative disease related genes, which were found in the proband patient, such as ATP binding cassette subfamily A member 7 (ABCA7), Notch Receptor 3 (NOTCH3), or Leucine-rich repeat kinase 2 (LRRK2). These interactions of pathway networks among PSEN2 and other disease risk factors could be responsible for the disease phenotype through other pathways. For example, PSEN2 and ABCA7 may impact amyloid processing and reduce amyloid clearance. Interaction between PSEN2 and NOTCH3 variants may be associated with abnormal NOTCH signaling and a lower degree of neuroprotection. Along with LRRK2 variants, PSEN2 Thr421Met may impact neurodegeneration through Wnt related pathways. In the future, cellular studies of more than one mutation by CRISPR-Cas9 method along with biomarker profiles could be helpful to understand the complicated pathways.
Collapse
|
8
|
Bagaria J, Moon Y, Bagyinszky E, Shim KH, An SSA, Kim S, Han SH. Whole Exome Sequencing Reveals a Novel APOE Mutation in a Patient With Sporadic Early-Onset Alzheimer's Disease. Front Neurol 2022; 13:899644. [PMID: 35756922 PMCID: PMC9226417 DOI: 10.3389/fneur.2022.899644] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 05/04/2022] [Indexed: 11/13/2022] Open
Abstract
Apolipoprotein (APOE) is implicated and verified as the main risk factor for early-onset Alzheimer's disease (AD). APOE is a protein that binds to lipids and is involved in cholesterol stability. Our paper reports a case of a sporadic early-onset AD (sEOAD) patient of a 54-year-old Korean man, where a novel APOE Leu159Pro heterozygous mutation was revealed upon Whole Exome Sequence analysis. The proband's CSF showed downregulated levels of Aβ42, with unchanged Tau levels. The mutation is in the Low-Density Lipoprotein Receptor (LDLR) region of the APOE gene, which mediates the clearance of APOE lipoproteins. LDLR works as a high-affinity point for APOE. Studies suggest that APOE-LDLR interplay could have varying effects. The LDLR receptor pathway has been previously suggested as a therapeutic target to treat tauopathy. However, the APOE-LDLR interaction has also shown a significant correlation with memory retention. Leu159Pro could be an interesting mutation that could be responsible for a less damaging pattern of AD by suppressing tau-association neurodegeneration while affecting the patient's memory retention and cognitive performance.
Collapse
Affiliation(s)
- Jaya Bagaria
- Department of Bionanotechnology, Gachon University, Seongnam-si, South Korea
| | - Yeonsil Moon
- Department of Neurology, Konkuk University School of Medicine and Konkuk University Medical Center, Seoul, South Korea
| | - Eva Bagyinszky
- Department of Industrial and Environmental Engineering, Graduate School of Environment, Gachon University, Seongnam, South Korea
| | - Kyu Hwan Shim
- Department of Bionanotechnology, Gachon University, Seongnam-si, South Korea
| | - Seong Soo A An
- Department of Bionanotechnology, Gachon University, Seongnam-si, South Korea
| | - SangYun Kim
- Department of Neurology, Seoul National University College of Medicine and Seoul National University Budang Hospital, Seongnam-si, South Korea
| | - Seol Heui Han
- Department of Neurology, Konkuk University School of Medicine and Konkuk University Medical Center, Seoul, South Korea
| |
Collapse
|
9
|
Chen Z, Ma J, Liu L, Liu S, Zhang J, Chu M, Wang Z, Chan P, Wu L. Alterations of Striatal Subregions in a Prion Protein Gene V180I Mutation Carrier Presented as Frontotemporal Dementia With Parkinsonism. Front Aging Neurosci 2022; 14:830602. [PMID: 35493933 PMCID: PMC9053668 DOI: 10.3389/fnagi.2022.830602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 03/18/2022] [Indexed: 11/13/2022] Open
Abstract
Objective To explore the roles of striatal subdivisions in the pathogenesis of frontotemporal dementia with parkinsonism (FTDP) in a patient resulting from prion protein gene (PRNP) mutation. Methods This patient received clinical interviews and underwent neuropsychological assessments, genetic testing, [18F]-fluorodeoxyglucose positron emission tomography ([18F]-FDG PET)/MRI, and [18F]-dihydrotetrabenazine positron emission tomography ([18F]-DTBZ PET)/CT. Region-of-interest analysis was conducted concerning metabolism, and dopamine transport function between this patient and 12 controls, focusing on the striatum subregions according to the Oxford-GSK-Imanova Striatal Connectivity Atlas. Results A 64-year-old man initially presented with symptoms of motor dysfunction and subsequently behavioral and personality changes. FTDP was initially suspected. Sequence analysis disclosed a valine to isoleucine at codon 180 in PRNP. Compared to controls, this patient had a severe reduction (> 2SD) of standard uptake value ratio (SUVR) in the limbic and executive subregions but relative retention of metabolism in rostral motor and caudal motor subregions using [18F]-FDG PET/MRI, and the SUVR decreased significantly across the striatal in [18F]-DTBZ PET/CT, especially in the rostral motor and caudal motor subregions. Conclusion The alteration of frontal striatal loops may be involved in cognitive impairment in FTDP, and the development of parkinsonism in FTDP may be primarily due to the involvement of the presynaptic nigrostriatal loops in PRNP V180I mutation.
Collapse
Affiliation(s)
- Zhongyun Chen
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Jinghong Ma
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Li Liu
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Shuying Liu
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Jing Zhang
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Min Chu
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Zhen Wang
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Piu Chan
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
- National Clinical Research Center for Geriatric Diseases, Beijing, China
| | - Liyong Wu
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
- National Clinical Research Center for Geriatric Diseases, Beijing, China
| |
Collapse
|
10
|
Imai Y, Koseki Y, Hirano M, Nakamura S. Nutrigenomic Studies on the Ameliorative Effect of Enzyme-Digested Phycocyanin in Alzheimer's Disease Model Mice. Nutrients 2021; 13:nu13124431. [PMID: 34959983 PMCID: PMC8707209 DOI: 10.3390/nu13124431] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 12/03/2021] [Accepted: 12/06/2021] [Indexed: 01/01/2023] Open
Abstract
Alzheimer’s disease (AD) is the most common form of dementia, and the cognitive impairments associated with this degenerative disease seriously affect daily life. Nutraceuticals for the prevention or delay of AD are urgently needed. It has been increasingly observed that phycocyanin (PC) exerts neuroprotective effects. AD model mice intracerebroventricularly injected with amyloid beta-peptide 25–35 (Aβ25–35) at 10 nmol/head displayed significant cognitive impairment in the spontaneous alternation test. Cognitive impairment was significantly ameliorated in mice treated with 750 mg/kg of enzyme-digested (ED) PC by daily oral administration for 22 consecutive days. Application of DNA microarray data on hippocampal gene expression to nutrigenomics studies revealed that oral EDPC counteracted the aberrant expression of 35 genes, including Prnp, Cct4, Vegfd (Figf), Map9 (Mtap9), Pik3cg, Zfand5, Endog, and Hbq1a. These results suggest that oral administration of EDPC ameliorated cognitive impairment in AD model mice by maintaining and/or restoring normal gene expression patterns in the hippocampus.
Collapse
Affiliation(s)
- Yasuyuki Imai
- Health Care Technical G., Chiba Plants, DIC Corporation, Ichihara 290-8585, Chiba, Japan; (Y.I.); (Y.K.)
| | - Yurino Koseki
- Health Care Technical G., Chiba Plants, DIC Corporation, Ichihara 290-8585, Chiba, Japan; (Y.I.); (Y.K.)
| | - Makoto Hirano
- R&D Institute, Intelligence & Technology Lab, Inc., Kaizu 503-0628, Gifu, Japan;
| | - Shin Nakamura
- R&D Institute, Intelligence & Technology Lab, Inc., Kaizu 503-0628, Gifu, Japan;
- Biomedical Institute, NPO Primate Agora, Kaizu 503-0628, Gifu, Japan
- Correspondence: ; Tel.: +81-(0)-584-54-0015
| |
Collapse
|
11
|
Sahlin K, Mäkinen V. Accurate spliced alignment of long RNA sequencing reads. Bioinformatics 2021; 37:4643-4651. [PMID: 34302453 PMCID: PMC8665758 DOI: 10.1093/bioinformatics/btab540] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 06/29/2021] [Accepted: 07/20/2021] [Indexed: 11/13/2022] Open
Abstract
MOTIVATION Long-read RNA sequencing technologies are establishing themselves as the primary techniques to detect novel isoforms, and many such analyses are dependent on read alignments. However, the error rate and sequencing length of the reads create new challenges for accurately aligning them, particularly around small exons. RESULTS We present an alignment method uLTRA for long RNA sequencing reads based on a novel two-pass collinear chaining algorithm. We show that uLTRA produces higher accuracy over state-of-the-art aligners with substantially higher accuracy for small exons on simulated and synthetic data. On simulated data, uLTRA achieves an accuracy of about 60% for exons of length 10 nucleotides or smaller and close to 90% accuracy for exons of length between 11 to 20 nucleotides. On biological data where true read location is unknown, we show several examples where uLTRA aligns to known and novel isoforms containing small exons that are not detected with other aligners. While uLTRA obtains its accuracy using annotations, it can also be used as a wrapper around minimap2 to align reads outside annotated regions. AVAILABILITY uLTRA is available at https://github.com/ksahlin/ultra. SUPPLEMENTARY INFORMATION Supplementary data are available at Bioinformatics online.
Collapse
Affiliation(s)
- Kristoffer Sahlin
- Department of Mathematics, Science for Life Laboratory, Stockholm University, Stockholm, 106 91, Sweden
| | - Veli Mäkinen
- Department of Computer Science, University of Helsinki, P. O. Box 68, Pietari Kalmin katu 5, 00014, Finland
| |
Collapse
|
12
|
Watson N, Brandel JP, Green A, Hermann P, Ladogana A, Lindsay T, Mackenzie J, Pocchiari M, Smith C, Zerr I, Pal S. The importance of ongoing international surveillance for Creutzfeldt-Jakob disease. Nat Rev Neurol 2021; 17:362-379. [PMID: 33972773 PMCID: PMC8109225 DOI: 10.1038/s41582-021-00488-7] [Citation(s) in RCA: 64] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/18/2021] [Indexed: 02/04/2023]
Abstract
Creutzfeldt-Jakob disease (CJD) is a rapidly progressive, fatal and transmissible neurodegenerative disease associated with the accumulation of misfolded prion protein in the CNS. International CJD surveillance programmes have been active since the emergence, in the mid-1990s, of variant CJD (vCJD), a disease linked to bovine spongiform encephalopathy. Control measures have now successfully contained bovine spongiform encephalopathy and the incidence of vCJD has declined, leading to questions about the requirement for ongoing surveillance. However, several lines of evidence have raised concerns that further cases of vCJD could emerge as a result of prolonged incubation and/or secondary transmission. Emerging evidence from peripheral tissue distribution studies employing high-sensitivity assays suggests that all forms of human prion disease carry a theoretical risk of iatrogenic transmission. Finally, emerging diseases, such as chronic wasting disease and camel prion disease, pose further risks to public health. In this Review, we provide an up-to-date overview of the transmission of prion diseases in human populations and argue that CJD surveillance remains vital both from a public health perspective and to support essential research into disease pathophysiology, enhanced diagnostic tests and much-needed treatments.
Collapse
Affiliation(s)
- Neil Watson
- grid.4305.20000 0004 1936 7988National CJD Research & Surveillance Unit, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Jean-Philippe Brandel
- grid.411439.a0000 0001 2150 9058Cellule Nationale de référence des MCJ, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Alison Green
- grid.4305.20000 0004 1936 7988National CJD Research & Surveillance Unit, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Peter Hermann
- grid.411984.10000 0001 0482 5331National Reference Centre for TSE, Department of Neurology, University Medical Centre Göttingen, Göttingen, Germany
| | - Anna Ladogana
- grid.416651.10000 0000 9120 6856Registry of Creutzfeldt-Jakob Disease, Department of Neuroscience, Istituto Superiore di Sanità, Rome, Italy
| | - Terri Lindsay
- grid.4305.20000 0004 1936 7988National CJD Research & Surveillance Unit, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Janet Mackenzie
- grid.4305.20000 0004 1936 7988National CJD Research & Surveillance Unit, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Maurizio Pocchiari
- grid.416651.10000 0000 9120 6856Registry of Creutzfeldt-Jakob Disease, Department of Neuroscience, Istituto Superiore di Sanità, Rome, Italy
| | - Colin Smith
- grid.4305.20000 0004 1936 7988National CJD Research & Surveillance Unit, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Inga Zerr
- grid.411984.10000 0001 0482 5331National Reference Centre for TSE, Department of Neurology, University Medical Centre Göttingen, Göttingen, Germany
| | - Suvankar Pal
- grid.4305.20000 0004 1936 7988National CJD Research & Surveillance Unit, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| |
Collapse
|
13
|
Giau VV, Bagyinszky E, Youn YC, An SSA, Kim S. APP, PSEN1, and PSEN2 Mutations in Asian Patients with Early-Onset Alzheimer Disease. Int J Mol Sci 2019; 20:E4757. [PMID: 31557888 PMCID: PMC6801447 DOI: 10.3390/ijms20194757] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 09/12/2019] [Accepted: 09/23/2019] [Indexed: 12/13/2022] Open
Abstract
The number of patients with Alzheimer's disease (AD) is rapidly increasing in Asia. Mutations in the amyloid protein precursor (APP), presenilin-1 (PSEN1), and presenilin-2 (PSEN2) genes can cause autosomal dominant forms of early-onset AD (EOAD). Although these genes have been extensively studied, variant classification remains a challenge, highlighting the need to colligate mutations across populations. In this study, we performed a genetic screening for mutations in the APP, PSEN1, and PSEN2 genes in 200 clinically diagnosed EOAD patients across four Asian countries, including Thailand, Malaysia, the Philippines, and Korea, between 2009 and 2018. Thirty-two (16%) patients presented pathogenic APP, PSEN1, or PSEN2 variants; eight (25%), 19 (59%), and five (16%) of the 32 patients presented APP, PSEN1, and PSEN2 variants, respectively. Among the 21 novel and known non-synonymous variants, five APP variants were found in Korean patients and one APP variant was identified in a Thai patient with EOAD. Nine, two, and one PSEN1 mutation was found in a Korean patient, Malaysian siblings, and a Thai patient, respectively. Unlike PSEN1 mutations, PSEN2 mutations were rare in patients with EOAD; only three variants were found in Korean patients with EOAD. Comparison of AD-causative point mutations in Asian countries; our findings explained only a small fraction of patients, leaving approximately 84% (p = 0.01) of autosomal dominant pedigrees genetically unexplained. We suggest that the use of high-throughput sequencing technologies for EOAD patients can potentially improve our understanding of the molecular mechanisms of AD.
Collapse
Affiliation(s)
- Vo Van Giau
- Graduate School of Environment Department of Industrial and Environmental Engineering, Gachon University, 1342 Sungnam-daero, Sujung-gu, Seongnam-si, Gyeonggi-do 461-701, Korea.
| | - Eva Bagyinszky
- Graduate School of Environment Department of Industrial and Environmental Engineering, Gachon University, 1342 Sungnam-daero, Sujung-gu, Seongnam-si, Gyeonggi-do 461-701, Korea.
| | - Young Chul Youn
- Department of Neurology, College of Medicine, Chung-Ang University, Seoul 06973, Korea.
| | - Seong Soo A An
- Department of BionanoTechnology, Gachon Medical Research Institute, Gachon University, 1342 Sungnam-daero, Sujung-gu, Seongnam-si, Gyeonggi-do 461-701, Korea.
| | - SangYun Kim
- Department of Neurology, Seoul National University College of Medicine & Neurocognitive Behavior Center, Seoul National University Bundang Hospital, 300 Gumidong, Bundang-gu, Seongnam-si, Gyeonggi-do 463-707, Korea.
| |
Collapse
|
14
|
Potential Fluid Biomarkers for the Diagnosis of Mild Cognitive Impairment. Int J Mol Sci 2019; 20:ijms20174149. [PMID: 31450692 PMCID: PMC6747411 DOI: 10.3390/ijms20174149] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 08/20/2019] [Accepted: 08/23/2019] [Indexed: 02/07/2023] Open
Abstract
Mild cognitive impairment (MCI) is characterized by a level of cognitive impairment that is lower than normal for a person’s age, but a higher function than that that observed in a demented person. MCI represents a transitional state between normal aging and dementia disorders, especially Alzheimer’s disease (AD). Much effort has been made towards determining the prognosis of a person with MCI who will convert to AD. It is now clear that cerebrospinal fluid (CSF) levels of Aβ40, Aβ42, total tau and phosphorylated tau are useful for predicting the risk of progression from MCI to AD. This review highlights the advantages of the current blood-based biomarkers in MCI, and discusses some of these challenges, with an emphasis on recent studies to provide an overview of the current state of MCI.
Collapse
|