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Duan S, Yang J, Cui Z, Li J, Zheng H, Zhao T, Yuan Y, Liu Y, Zhao L, Wang Y, Luo H, Xu Y. Seed amplification assay of nasal swab extracts for accurate and non-invasive molecular diagnosis of neurodegenerative diseases. Transl Neurodegener 2023; 12:13. [PMID: 36922862 PMCID: PMC10017346 DOI: 10.1186/s40035-023-00345-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 03/02/2023] [Indexed: 03/18/2023] Open
Abstract
Nasal swabs are non-invasive testing methods for detecting diseases by collecting samples from the nasal cavity or nasopharynx. Dysosmia is regarded as an early sign of coronavirus disease 2019 (COVID-19), and nasal swabs are the gold standard for the detection. By nasal swabs, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) nucleic acids can be cyclically amplified and detected using real-time reverse transcriptase-polymerase chain reaction after sampling. Similarly, olfactory dysfunction precedes the onset of typical clinical manifestations by several years in prion diseases and other neurodegenerative diseases, such as Alzheimer's disease, Parkinson's disease, dementia with Lewy bodies, and multiple system atrophy. In neurodegenerative diseases, nasal swab tests are currently being explored using seed amplification assay (SAA) of pathogenic misfolded proteins, such as prion, α-synuclein, and tau. These misfolded proteins can serve as templates for the conformational change of other copies from the native form into the same misfolded form in a prion-like manner. SAA for misfolded prion-like proteins from nasal swab extracts has been developed, conceptually analogous to PCR, showing high sensitivity and specificity for molecular diagnosis of degenerative diseases even in the prodromal stage. Cyclic amplification assay of nasal swab extracts is an attractive and feasible method for accurate and non-invasive detection of trace amount of pathogenic substances for screening and diagnosis of neurodegenerative disease.
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Affiliation(s)
- Suying Duan
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China.,Henan Key Laboratory of Cerebrovascular Diseases, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - Jing Yang
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China.,Henan Key Laboratory of Cerebrovascular Diseases, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China.,Institute of Neuroscience, Zhengzhou University, Zhengzhou, China
| | - Zheqing Cui
- Department of Rhinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Jiaqi Li
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China.,Henan Key Laboratory of Cerebrovascular Diseases, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - Honglin Zheng
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China.,The Academy of Medical Sciences of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - Taiqi Zhao
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China.,Henan Key Laboratory of Cerebrovascular Diseases, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China
| | - Yanpeng Yuan
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China.,Institute of Neuroscience, Zhengzhou University, Zhengzhou, China
| | - Yutao Liu
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China.,Institute of Neuroscience, Zhengzhou University, Zhengzhou, China
| | - Lu Zhao
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China.,Institute of Neuroscience, Zhengzhou University, Zhengzhou, China
| | - Yangyang Wang
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China.,Institute of Neuroscience, Zhengzhou University, Zhengzhou, China
| | - Haiyang Luo
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China. .,Henan Key Laboratory of Cerebrovascular Diseases, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China. .,Institute of Neuroscience, Zhengzhou University, Zhengzhou, China.
| | - Yuming Xu
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China. .,Henan Key Laboratory of Cerebrovascular Diseases, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, China. .,Institute of Neuroscience, Zhengzhou University, Zhengzhou, China.
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Hayashi Y, Iwasaki Y, Takekoshi A, Yoshikura N, Asano T, Mimuro M, Kimura A, Satoh K, Kitamoto T, Yoshida M, Inuzuka T. An autopsy-verified case of FTLD-TDP type A with upper motor neuron-predominant motor neuron disease mimicking MM2-thalamic-type sporadic Creutzfeldt-Jakob disease. Prion 2016; 10:492-501. [PMID: 27929803 DOI: 10.1080/19336896.2016.1243192] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Here we report an autopsy-verified case of frontotemporal lobar degeneration (FTLD)-transactivation responsive region (TAR) DNA binding protein (TDP) type A with upper motor neuron-predominant motor neuron disease mimicking MM2-thalamic-type sporadic Creutzfeldt-Jakob disease (sCJD). A 69-year-old woman presented with an 11-month history of progressive dementia, irritability, insomnia, and gait disturbance without a family history of dementia or prion disease. Neurological examination revealed severe dementia, frontal signs, and exaggerated bilateral tendon reflexes. Periodic sharp-wave complexes were not observed on the electroencephalogram. Brain diffusion MRI did not reveal abnormal changes. An easy Z score (eZIS) analysis for 99mTc-ECD-single photon emission computed tomography (99mTc-ECD-SPECT) revealed a bilateral decrease in thalamic regional cerebral blood flow (rCBF). PRNP gene analysis demonstrated methionine homozygosity at codon 129 without mutation. Cerebrospinal fluid (CSF) analysis showed normal levels of both 14-3-3 and total tau proteins. Conversely, prion protein was slowly amplified in the CSF by a real-time quaking-induced conversion assay. Her symptoms deteriorated to a state of akinetic mutism, and she died of sudden cardiac arrest, one year after symptom onset. Despite the SPECT results supporting a clinical diagnosis of MM2-thalamic-type sCJD, a postmortem assessment revealed that this was a case of FTLD-TDP type A, and excluded prion disease. Thus, this case indicates that whereas a bilateral decreasing thalamic rCBF detected by 99mTc-ECD-SPECT can be useful for diagnosing MM2-thalamic-type sCJD, it is not sufficiently specific. Postmortem diagnosis remains the gold standard for the diagnosis of this condition.
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Affiliation(s)
- Yuichi Hayashi
- a Department of Neurology and Geriatrics , Gifu University Graduate School of Medicine , Gifu , Japan
| | - Yasushi Iwasaki
- b Department of Neuropathology , Institute for Medical Science of Aging, Aichi Medical University , Nagakute , Japan
| | - Akira Takekoshi
- a Department of Neurology and Geriatrics , Gifu University Graduate School of Medicine , Gifu , Japan
| | - Nobuaki Yoshikura
- a Department of Neurology and Geriatrics , Gifu University Graduate School of Medicine , Gifu , Japan
| | - Takahiko Asano
- c Department of Radiology , Gifu University Graduate School of Medicine , Gifu , Japan
| | - Maya Mimuro
- b Department of Neuropathology , Institute for Medical Science of Aging, Aichi Medical University , Nagakute , Japan
| | - Akio Kimura
- a Department of Neurology and Geriatrics , Gifu University Graduate School of Medicine , Gifu , Japan
| | - Katsuya Satoh
- d Department of Locomotive Rehabilitation Sciences . Nagasaki University Graduate School of Medicine , Nagasaki , Japan
| | - Tetsuyuki Kitamoto
- e Division of CJD Science and Technology, Department of Prion Research , Center for Translational and Advanced Animal Research on Human Diseases, Tohoku University School of Medicine , Sendai , Japan
| | - Mari Yoshida
- b Department of Neuropathology , Institute for Medical Science of Aging, Aichi Medical University , Nagakute , Japan
| | - Takashi Inuzuka
- a Department of Neurology and Geriatrics , Gifu University Graduate School of Medicine , Gifu , Japan
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