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Oba R, Ujike N, Ono Y, Okano T, Murakami T. Label-free autofluorescence and hyperspectral imaging of cerebral amyloid-β lesions in aged squirrel monkeys. J Vet Diagn Invest 2024; 36:41-45. [PMID: 37830746 PMCID: PMC10734585 DOI: 10.1177/10406387231204876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2023] Open
Abstract
The observation of amyloid-β (Aβ) lesions using autofluorescence in transgenic mice and human Alzheimer disease patients has been reported frequently. However, no reports verify the autofluorescence of spontaneous Aβ amyloidosis in animals, to our knowledge. We validated the autofluorescence of Aβ lesions in spontaneous squirrel monkey cases under label-free conditions; lesions had intense blue-white autofluorescence in fluorescence microscopy using excitation light at 400-440 nm. Thioflavin S staining and immunohistochemistry of the same specimens revealed that this blue-white autofluorescence was derived from Aβ lesions. Hyperspectral analysis of these lesions revealed a characteristic spectrum with bimodal peaks at 440 and 460 nm, as reported for Aβ lesions in mice. Principal component analysis using hyperspectral data specifically separated the Aβ lesions from other autofluorescent substances, such as lipofuscin. A non-labeled and mechanistic detection of Aβ lesions by hyperspectral imaging could provide valuable insights for developing early diagnostic techniques.
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Affiliation(s)
- Ryohei Oba
- Laboratory of Veterinary Toxicology, Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan
| | - Naoki Ujike
- Laboratory of Veterinary Toxicology, Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan
| | - Yuki Ono
- Advanced Technology Center, Corporate R&D Headquarters, Konica Minolta, Hachioji, Tokyo, Japan
| | - Takayuki Okano
- Advanced Technology Center, Corporate R&D Headquarters, Konica Minolta, Hachioji, Tokyo, Japan
| | - Tomoaki Murakami
- Laboratory of Veterinary Toxicology, Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan
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Schilling KG, Gao Y, Christian M, Janve V, Stepniewska I, Landman BA, Anderson AW. A Web-Based Atlas Combining MRI and Histology of the Squirrel Monkey Brain. Neuroinformatics 2019; 17:131-145. [PMID: 30006920 DOI: 10.1007/s12021-018-9391-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The squirrel monkey (Saimiri sciureus) is a commonly-used surrogate for humans in biomedical research. In the neuroimaging community, MRI and histological atlases serve as valuable resources for anatomical, physiological, and functional studies of the brain; however, no digital MRI/histology atlas is currently available for the squirrel monkey. This paper describes the construction of a web-based multi-modal atlas of the squirrel monkey brain. The MRI-derived information includes anatomical MRI contrast (i.e., T2-weighted and proton-density-weighted) and diffusion MRI metrics (i.e., fractional anisotropy and mean diffusivity) from data acquired both in vivo and ex vivo on a 9.4 Tesla scanner. The histological images include Nissl and myelin stains, co-registered to the corresponding MRI, allowing identification of cyto- and myelo-architecture. In addition, a bidirectional neuronal tracer, biotinylated dextran amine (BDA) was injected into the primary motor cortex, enabling highly specific identification of regions connected to the injection location. The atlas integrates the results of common image analysis methods including diffusion tensor imaging glyphs, labels of 57 white-matter tracts identified using DTI-tractography, and 18 cortical regions of interest identified from Nissl-revealed cyto-architecture. All data are presented in a common space, and all image types are accessible through a web-based atlas viewer, which allows visualization and interaction of user-selectable contrasts and varying resolutions. By providing an easy to use reference system of anatomical information, our web-accessible multi-contrast atlas forms a rich and convenient resource for comparisons of brain findings across subjects or modalities. The atlas is called the Combined Histology-MRI Integrated Atlas of the Squirrel Monkey (CHIASM). All images are accessible through our web-based viewer ( https://chiasm.vuse.vanderbilt.edu /), and data are available for download at ( https://www.nitrc.org/projects/smatlas/ ).
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Affiliation(s)
- Kurt G Schilling
- Vanderbilt University Institute of Imaging Science, Vanderbilt University, Nashville, TN, USA. .,Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA.
| | - Yurui Gao
- Vanderbilt University Institute of Imaging Science, Vanderbilt University, Nashville, TN, USA.,Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
| | - Matthew Christian
- Vanderbilt University Institute of Imaging Science, Vanderbilt University, Nashville, TN, USA
| | - Vaibhav Janve
- Vanderbilt University Institute of Imaging Science, Vanderbilt University, Nashville, TN, USA.,Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
| | | | - Bennett A Landman
- Vanderbilt University Institute of Imaging Science, Vanderbilt University, Nashville, TN, USA.,Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA.,Radiology and Radiological Sciences, Vanderbilt University, Nashville, TN, USA.,Department of Electrical Engineering, Vanderbilt University, Nashville, TN, USA
| | - Adam W Anderson
- Vanderbilt University Institute of Imaging Science, Vanderbilt University, Nashville, TN, USA.,Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA.,Radiology and Radiological Sciences, Vanderbilt University, Nashville, TN, USA
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Schilling KG, Yeh FC, Nath V, Hansen C, Williams O, Resnick S, Anderson AW, Landman BA. A fiber coherence index for quality control of B-table orientation in diffusion MRI scans. Magn Reson Imaging 2019; 58:82-89. [PMID: 30682379 DOI: 10.1016/j.mri.2019.01.018] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 01/17/2019] [Accepted: 01/19/2019] [Indexed: 12/19/2022]
Abstract
PURPOSE The diffusion MRI "b-vector" table describing the diffusion sensitization direction can be flipped and permuted in dimension due to different orientation conventions used in scanners and incorrect or improperly utilized file formats. This can lead to incorrect fiber orientation estimates and subsequent tractography failure. Here, we present an automated quality control procedure to detect when the b-table is flipped and/or permuted incorrectly. METHODS We define a "fiber coherence index" to describe how well fibers are connected to each other, and use it to automatically detect the correct configuration of b-vectors. We examined the performance on 3981 research subject scans (Baltimore Longitudinal Study of Aging), 1065 normal subject scans of high image quality (Human Connectome Project), and 202 patient scans (Vanderbilt University Medical Center), as well as 9 in-vivo and 9 ex-vivo animal data. RESULTS The coherence index resulted in a 99.9% (3979/3981) and 100% (1065/1065) success rate in normal subject scans, 98% (198/202) in patient scans, and 100% (18/18) in both in-vivo and ex-vivo animal data in detecting the correct gradient table in datasets without severe image artifacts. The four failing cases (4/202) in patient scans, and two failures in healthy subject scans (2/3981), all showed prominent motion or signal dropout artifacts. CONCLUSIONS The fiber coherence measure can be used as an automatic quality assurance check in any diffusion analysis pipeline. Additionally, the success of this fiber coherence measure suggests potential broader applications, including evaluating data quality, or even providing diagnostic value as a biomarker of white matter integrity.
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Affiliation(s)
- Kurt G Schilling
- Vanderbilt University Institute of Imaging Science, Vanderbilt University, Nashville, TN, USA.
| | - Fang-Cheng Yeh
- Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA; Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA
| | - Vishwesh Nath
- Electrical Engineering & Computer Science, Vanderbilt University, Nashville, TN, USA
| | - Colin Hansen
- Department of Electrical Engineering, Vanderbilt University, Nashville, TN, USA
| | - Owen Williams
- Laboratory of Behavioral Neuroscience, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - Susan Resnick
- Laboratory of Behavioral Neuroscience, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - Adam W Anderson
- Vanderbilt University Institute of Imaging Science, Vanderbilt University, Nashville, TN, USA; Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
| | - Bennett A Landman
- Vanderbilt University Institute of Imaging Science, Vanderbilt University, Nashville, TN, USA; Department of Electrical Engineering, Vanderbilt University, Nashville, TN, USA; Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
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Tsukawaki S, Murakami T, Ibi K, Kuraishi T, Hattori S, Kai C, Suzuki K, Yanai T. Amyloidosis enhancing activity of bovine amyloid A fibrils in C3H/HeN mice and cynomolgus monkeys (Macaca fascicularis). J Med Primatol 2016; 45:112-7. [PMID: 27072531 DOI: 10.1111/jmp.12213] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/20/2016] [Indexed: 11/27/2022]
Abstract
BACKGROUND In experimentally induced cases of AA amyloidosis, the development of disease is enhanced by the administration of homogenous or heterogeneous amyloid fibrils. In recent years, cross-species transmission of animal amyloidosis into human has become of particular concern. METHODS Cynomolgus monkeys (Macaca fascicularis) and C3H/HeN mice were inoculated with bovine amyloid fibrils under acute inflammation. RESULTS Amyloid A deposits were not detected in any of the monkeys, but mild-to-severe AA deposits were found in all mice. CONCLUSIONS These results suggest that unlike in rodents, cross-species transmission of AA amyloidosis is less likely to develop, at least during acute inflammation, in primates.
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Affiliation(s)
- Satomi Tsukawaki
- Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Tomoaki Murakami
- Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Kanata Ibi
- Department of Veterinary Medicine, Gifu University, Gifu, Japan
| | - Takeshi Kuraishi
- Amami Laboratory of Injurious Animals, The Institute of Medical Science, The University of Tokyo, Kagoshima, Japan
| | - Shosaku Hattori
- Amami Laboratory of Injurious Animals, The Institute of Medical Science, The University of Tokyo, Kagoshima, Japan
| | - Chieko Kai
- Amami Laboratory of Injurious Animals, The Institute of Medical Science, The University of Tokyo, Kagoshima, Japan.,Laboratory Animal Research Center, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Kazuhiko Suzuki
- Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Tokuma Yanai
- Department of Veterinary Medicine, Gifu University, Gifu, Japan
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Murakami T, Inoshima Y, Ishiguro N. Systemic AA amyloidosis as a prion-like disorder. Virus Res 2014; 207:76-81. [PMID: 25533533 DOI: 10.1016/j.virusres.2014.12.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Revised: 12/06/2014] [Accepted: 12/11/2014] [Indexed: 10/24/2022]
Abstract
Amyloidosis is a collective term for a group of disorders that induce functional impairment of organs and occurs through the accumulation of amyloid, or misfolded protein in beta-sheets. AA amyloidosis is a lethal systemic amyloidosis with SAA as the precursor protein, and is observed in various animal species, including humans. AA amyloidosis can be induced artificially by continuously administering inflammatory stimuli in experimental animal models. In this process of experimental induction, the administration of AA amyloids from either the same or different species is known to markedly expedite AA amyloidosis development, and this is also termed transmission of AA amyloidosis. Similarly to prion disease, AA amyloidosis is considered to be transmitted via a "seeding-nucleation" process. In this manuscript, we reviewed the pathology and transmissibility of AA amyloidosis in animals.
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Affiliation(s)
- Tomoaki Murakami
- Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Yasuo Inoshima
- Department of Veterinary Medicine, Gifu University, Gifu, Japan
| | - Naotaka Ishiguro
- Department of Veterinary Medicine, Gifu University, Gifu, Japan.
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