1
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Omori N, Nagai A. [Hematologic Diseases and Neurological Complications]. Brain Nerve 2024; 76:221-229. [PMID: 38514103 DOI: 10.11477/mf.1416202592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Abstract
Many hematologic diseases can be complicated by neurological symptoms during the disease course. Hematologic diseases can contribute to strokes and neuropathies; thus, neurologists should be aware of them. Recent reports have increased of neurological side effects associated with new anticancer therapies such as immune checkpoint inhibitors and chimeric antigen receptor-T cell therapy. The relationship between hematologic diseases and neurological complications is expected to become more prevalent.
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Affiliation(s)
- Naoki Omori
- Department of Neurology, Shimane Prefectural Central Hospital
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2
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Shahmirzaee M, Nagai A. An Appraisal for Providing Charge Transfer (CT) Through Synthetic Porous Frameworks for their Semiconductor Applications. Small 2024:e2307828. [PMID: 38368249 DOI: 10.1002/smll.202307828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 01/08/2024] [Indexed: 02/19/2024]
Abstract
In recent years, there has been considerable focus on the development of charge transfer (CT) complex formation as a means to modify the band gaps of organic materials. In particular, CT complexes alternate layers of aromatic molecules with donor (D) and acceptor (A) properties to provide inherent electrical conductivity. In particular, the synthetic porous frameworks as attractive D-A components have been extensively studied in recent years in comparison to existing D-A materials. Therefore, in this work, the synthetic porous frameworks are classified into conjugated microporous polymers (CMPs), covalent organic frameworks (COFs), and metal-organic frameworks (MOFs) and compare high-quality materials for CT in semiconductors. This work updates the overview of the above porous frameworks for CT, starting with their early history regarding their semiconductor applications, and lists CT concepts and selected key developments in their CT complexes and CT composites. In addition, the network formation methods and their functionalization are discussed to provide access to a variety of potential applications. Furthermore, several theoretical investigations, efficiency improvement techniques, and a discussion of the electrical conductivity of the porous frameworks are also highlighted. Finally, a perspective of synthetic porous framework studies on CT performance is provided along with some comparisons.
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Affiliation(s)
| | - Atsushi Nagai
- ENSEMBLE 3 - Centre of Excellence, Warsaw, 01-919, Poland
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3
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Sheikh AM, Yano S, Tabassum S, Nagai A. The Role of the Vascular System in Degenerative Diseases: Mechanisms and Implications. Int J Mol Sci 2024; 25:2169. [PMID: 38396849 PMCID: PMC10889477 DOI: 10.3390/ijms25042169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 02/03/2024] [Accepted: 02/07/2024] [Indexed: 02/25/2024] Open
Abstract
Degenerative diseases, encompassing a wide range of conditions affecting various organ systems, pose significant challenges to global healthcare systems. This comprehensive review explores the intricate interplay between the vascular system and degenerative diseases, shedding light on the underlying mechanisms and profound implications for disease progression and management. The pivotal role of the vascular system in maintaining tissue homeostasis is highlighted, as it serves as the conduit for oxygen, nutrients, and immune cells to vital organs and tissues. Due to the vital role of the vascular system in maintaining homeostasis, its dysfunction, characterized by impaired blood flow, endothelial dysfunction, and vascular inflammation, emerges as a common denominator of degenerative diseases across multiple systems. In the nervous system, we explored the influence of vascular factors on neurodegenerative diseases such as Alzheimer's and Parkinson's, emphasizing the critical role of cerebral blood flow regulation and the blood-brain barrier. Within the kidney system, the intricate relationship between vascular health and chronic kidney disease is scrutinized, unraveling the mechanisms by which hypertension and other vascular factors contribute to renal dysfunction. Throughout this review, we emphasize the clinical significance of understanding vascular involvement in degenerative diseases and potential therapeutic interventions targeting vascular health, highlighting emerging treatments and prevention strategies. In conclusion, a profound appreciation of the role of the vascular system in degenerative diseases is essential for advancing our understanding of degenerative disease pathogenesis and developing innovative approaches for prevention and treatment. This review provides a comprehensive foundation for researchers, clinicians, and policymakers seeking to address the intricate relationship between vascular health and degenerative diseases in pursuit of improved patient outcomes and enhanced public health.
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Affiliation(s)
- Abdullah Md. Sheikh
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya Cho, Izumo 693-8501, Japan; (S.Y.); (S.T.); (A.N.)
| | - Shozo Yano
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya Cho, Izumo 693-8501, Japan; (S.Y.); (S.T.); (A.N.)
| | - Shatera Tabassum
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya Cho, Izumo 693-8501, Japan; (S.Y.); (S.T.); (A.N.)
| | - Atsushi Nagai
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya Cho, Izumo 693-8501, Japan; (S.Y.); (S.T.); (A.N.)
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya Cho, Izumo 693-8501, Japan
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4
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Zhang Y, Sheikh AM, Tabassum S, Iwasa K, Shibly AZ, Zhou X, Wang R, Bhuiya J, Abdullah FB, Yano S, Aoki Y, Nagai A. Effect of high-fat diet on cerebral pathological changes of cerebral small vessel disease in SHR/SP rats. GeroScience 2024:10.1007/s11357-024-01074-7. [PMID: 38319539 DOI: 10.1007/s11357-024-01074-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Accepted: 01/10/2024] [Indexed: 02/07/2024] Open
Abstract
Cerebral small vessel diseases (CSVD) are neurological disorders associated with microvessels, manifested pathologically as white matter (WM) changes and cortical microbleeds, with hypertension as a risk factor. Additionally, a high-fat diet (HFD) can affect peripheral vessel health. Our study explored how HFD affects cerebral small vessels in normotensive WKY, hypertensive SHR, and SHR/SP rats. The MRI results revealed that HFD specifically increased WM hyperintensity in SHR/SP rats. Pathologically, it increased WM pallor and vacuolation in SHR and SHR/SP rats. Levels of blood-brain barrier (BBB) protein claudin 5 were decreased in SHR and SHR/SP compared to WKY, with HFD having minimal impact on these levels. Conversely, collagen IV levels remained consistent among the rat strains, which were increased by HFD. Consequently, HFD caused vessel leakage in all rat strains, particularly within the corpus callosum of SHR/SP rats. To understand the underlying mechanisms, we assessed the levels of hypoxia-inducible factor-1α (HIF-1α), Gp91-phox, and neuroinflammatory markers astrocytes, and microglia were increased in SHR and SHR/SP compared to WKY and were further elevated by HFD in all rat strains. Gp91-phox was also increased in SHR and SHR/SP compared to WKY, with HFD causing an increase in WKY but little effect in SHR and SHR/SP. In conclusion, our study demonstrates that HFD, in combined with hypertension, intensifies cerebral pathological alterations in CSVD rats. This exacerbation involves increased oxidative stress and HIF-1α in cerebral vessels, triggering neuroinflammation, vascular basement membrane remodeling, IgG leakage, and ultimately WM damage.
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Affiliation(s)
- Yuchi Zhang
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya-Cho, Izumo, 693-8501, Japan
- Department of Pharmacology, School of Basic Medical Sciences, Heilongjiang University of Chinese Medicine, Harbin, 150040, China
| | - Abdullah Md Sheikh
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, Izumo, 693-8501, Japan
| | - Shatera Tabassum
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, Izumo, 693-8501, Japan
| | - Kenichi Iwasa
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya-Cho, Izumo, 693-8501, Japan
| | - Abu Zaffar Shibly
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya-Cho, Izumo, 693-8501, Japan
- Department of Biotechnology and Genetic Engineering, Mawlana Bhashani Science and Technology University, Santosh, Tangail, 1902, Bangladesh
| | - Xiaojing Zhou
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya-Cho, Izumo, 693-8501, Japan
- Department of Neurology, Zhoushan Hospital, Zhoushan, 316004, China
| | - Ruochen Wang
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya-Cho, Izumo, 693-8501, Japan
| | - Jubo Bhuiya
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya-Cho, Izumo, 693-8501, Japan
| | - Fatema Binte Abdullah
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya-Cho, Izumo, 693-8501, Japan
| | - Shozo Yano
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, Izumo, 693-8501, Japan
| | - Yoshihito Aoki
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya-Cho, Izumo, 693-8501, Japan
| | - Atsushi Nagai
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya-Cho, Izumo, 693-8501, Japan.
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5
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Maeda J, Nagai A, Aizawa Y, Kato TA. Palmitoyl ascorbic acid glucoside enhanced cell survival with post irradiation treatment. Biochem Biophys Res Commun 2024; 694:149386. [PMID: 38134476 DOI: 10.1016/j.bbrc.2023.149386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023]
Abstract
Radiation exposure poses a significant threat to cellular integrity by inducing DNA damage through the generation of free radicals and reactive oxygen species. Ascorbic acid, particularly its derivative Palmitoyl Ascorbic Acid 2-Glucoside (PA2G), has demonstrated remarkable radioprotective properties. While previous research focused on its pre-irradiation application, this study explores the post-irradiation radiomitigation potential of PA2G. Our findings reveal that post-irradiation treatment with PA2G enhances cell survival and accelerates DNA repair processes, particularly the non-homologous end-joining (NHEJ) repair pathway. Notably, PA2G treatment reduces the frequency of lethal chromosomal aberrations and micronuclei formation, indicating its ability to enhance the repair of complex DNA lesions. Furthermore, PA2G is shown to play a role in potentially lethal damage repair (PLDR). These radioprotective effects are specific to NHEJ and ATM pathways, as cells deficient in these mechanisms do not benefit from PA2G treatment. This study highlights PA2G as a versatile radioprotector, both pre- and post-irradiation, with significant potential for applications in radiation therapy and protection, offering new insights into its mechanism of action. Further research is required to elucidate the precise molecular mechanisms underlying PA2G's radiomitigation effects and its potential clinical applications.
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Affiliation(s)
- Junko Maeda
- Department of Environmental & Radiological Health Sciences, Colorado State University, USA
| | - Atsushi Nagai
- Research and Development Center, Carlit Holdings Co. Ltd, Japan
| | - Yasushi Aizawa
- Research and Development Center, Carlit Holdings Co. Ltd, Japan
| | - Takamitsu A Kato
- Department of Environmental & Radiological Health Sciences, Colorado State University, USA.
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6
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Shibly AZ, Sheikh AM, Michikawa M, Tabassum S, Azad AK, Zhou X, Zhang Y, Yano S, Nagai A. Correction: Shibly et al. Analysis of Cerebral Small Vessel Changes in AD Model Mice. Biomedicines 2023, 11, 50. Biomedicines 2024; 12:104. [PMID: 38255328 PMCID: PMC10807687 DOI: 10.3390/biomedicines12010104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Accepted: 12/20/2023] [Indexed: 01/24/2024] Open
Abstract
In the original publication [...].
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Affiliation(s)
- Abu Zaffar Shibly
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo 693-8501, Japan; (A.Z.S.); (A.K.A.); (X.Z.); (Y.Z.)
- Department of Biotechnology and Genetic Engineering, Mawlana Bhashani Science and Technology University, Santosh, Tangail 1902, Bangladesh
| | - Abdullah Md. Sheikh
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo 693-8501, Japan; (A.M.S.); (S.T.); (S.Y.)
| | - Makoto Michikawa
- Department of Biochemistry, Graduate School of Medical Sciences, Nagoya City University, Nagoya 467-8601, Japan;
| | - Shatera Tabassum
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo 693-8501, Japan; (A.M.S.); (S.T.); (S.Y.)
| | - Abul Kalam Azad
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo 693-8501, Japan; (A.Z.S.); (A.K.A.); (X.Z.); (Y.Z.)
| | - Xiaojing Zhou
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo 693-8501, Japan; (A.Z.S.); (A.K.A.); (X.Z.); (Y.Z.)
| | - Yuchi Zhang
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo 693-8501, Japan; (A.Z.S.); (A.K.A.); (X.Z.); (Y.Z.)
| | - Shozo Yano
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo 693-8501, Japan; (A.M.S.); (S.T.); (S.Y.)
| | - Atsushi Nagai
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo 693-8501, Japan; (A.Z.S.); (A.K.A.); (X.Z.); (Y.Z.)
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7
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Sakai Y, Egawa D, Hattori J, Morikawa Y, Suenami K, Takayama T, Nagai A, Michiue T, Ikari A, Matsunaga T. α-Pyrrolidinononanophenone derivatives induce differentiated SH-SY5Y neuroblastoma cell apoptosis via reduction of antioxidant capacity: Involvement of NO depletion and inactivation of Nrf2/HO1 signaling pathway. Neurotoxicology 2024; 100:3-15. [PMID: 38040126 DOI: 10.1016/j.neuro.2023.11.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 11/12/2023] [Accepted: 11/25/2023] [Indexed: 12/03/2023]
Abstract
α-Pyrrolidinononanophenone (α-PNP) derivatives are known to be one of the hazardous new psychoactive substances due to the most extended hydrocarbon chains of any pyrrolidinophenones on the illicit drug market. Our previous report showed that 4'-iodo-α-PNP (I-α-PNP) is the most potent cytotoxic compound among α-PNP derivatives and induces apoptosis due to mitochondrial dysfunction and suppression of nitric oxide (NO) production in differentiated human neuronal SH-SY5Y cells. In this study, to clarify the detailed action mechanisms by I-α-PNP, we investigated the mechanism of reactive oxygen species (ROS) -dependent apoptosis by I-α-PNP in differentiated SH-SY5Y with a focus on the antioxidant activities. Treatment with I-α-PNP elicits overproduction of ROS such as H2O2, hydroxyl radical, and 4-hydroxy-2-nonenal, and pretreatment with antioxidant N-acetyl-L-cysteine is attenuated the SH-SY5Y cells apoptosis by I-α-PNP. These results suggested that the overproduction of ROS is related to SH-SY5Y cell apoptosis by I-α-PNP. In addition, I-α-PNP markedly decreased antioxidant capacity in differentiated cells than in undifferentiated cells and inhibited the upregulation of hemeoxygenase 1 (HO1) and glutathione peroxidase 4 (GPX4) expression caused by induction of differentiation. Furthermore, the treatment with I-α-PNP increased the nuclear expression level of BTB Domain And CNC Homolog 1 (Bach1), a transcriptional repressor of Nrf2, only in differentiated cells, suggesting that the marked decrease in antioxidant capacity in differentiated cells was due to suppression of Nrf2/HO1 signaling by Bach1. Additionally, pretreatment with an NO donor suppresses the I-α-PNP-evoked ROS overproduction, HO1 down-regulation, increased nuclear Bach1 expression and reduced antioxidant activity in the differentiated cells. These findings suggest that the ROS-dependent apoptosis by I-α-PNP in differentiated cells is attributed to the inactivation of the Nrf2/HO1 signaling pathway triggered by NO depletion.
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Affiliation(s)
- Yuji Sakai
- Forensic Science Laboratory, Gifu Prefectural Police Headquarters, Gifu 500-8501, Japan.
| | - Daisuke Egawa
- Laboratory of Bioinformatics, Gifu Pharmaceutical University, Gifu 502-8585, Japan
| | - Junta Hattori
- Laboratory of Bioinformatics, Gifu Pharmaceutical University, Gifu 502-8585, Japan
| | - Yoshifumi Morikawa
- Forensic Science Laboratory, Gifu Prefectural Police Headquarters, Gifu 500-8501, Japan
| | - Koichi Suenami
- Forensic Science Laboratory, Gifu Prefectural Police Headquarters, Gifu 500-8501, Japan
| | - Tomohiro Takayama
- Forensic Science Laboratory, Gifu Prefectural Police Headquarters, Gifu 500-8501, Japan
| | - Atsushi Nagai
- Department of Legal Medicine, Graduate School of Medicine, Gifu University, Gifu 501-1194, Japan
| | - Tomomi Michiue
- Department of Legal Medicine, Graduate School of Medicine, Gifu University, Gifu 501-1194, Japan
| | - Akira Ikari
- Laboratory of Biochemistry, Gifu Pharmaceutical University, Gifu 501-1196, Japan
| | - Toshiyuki Matsunaga
- Laboratory of Bioinformatics, Gifu Pharmaceutical University, Gifu 502-8585, Japan
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8
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Wlazło M, Maegawa K, Nagai A. Influence of Building Block Symmetry on the Band Structure of Stacked 2D Polyimide Covalent Organic Frameworks. ACS Omega 2023; 8:47913-47918. [PMID: 38144125 PMCID: PMC10734285 DOI: 10.1021/acsomega.3c06496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 11/15/2023] [Accepted: 11/16/2023] [Indexed: 12/26/2023]
Abstract
Covalent organic frameworks (COFs) are a class of crystalline porous materials distinctively built solely from organic elements, carbon, oxygen, hydrogen, and often nitrogen or boron. They form light, mechanically rigid, and chemically stable networks that have many advantages, but their low solubility and poor processability create issues with developing large-scale films or membranes. Two-dimensional (2D) COFs possess periodic porous crystallinity, functionality, modularity, and layered one-dimensional (1D) transport channels. All of these traits, along with the semiconducting properties of selected COFs, make them interesting candidates for integration in optoelectronic devices. Therefore, it is still a challenge to explore computationally and structurally the semiconductivity of COFs and to determine their final potential. Herein, we report on the possible semiconducting properties and results of polyimide-COF materials using density functional theory calculations. Our analysis includes monolayers and multilayers (AA- and AB-stacked modes) of mellitic triimide frameworks designed from mellitic trianhydride (MTA) as the main building knot, including MTI-TAPB-COF, which was previously synthesized from the condensation reaction of MTA and 1,3,5-tris(4-aminophenyl)benzene (TAPB), and other previously unreported structures based on MTA. Respective frameworks have been selected due to the difference in building block symmetry (C3 + C2 and C3 + C3) and different chemical linkages, either by benzene or by pyridine rings. We find the polyimide multilayers to be stable and with varying electronic properties. The finite band gap exhibited by every structure (monolayer and stacked) was sensitive to atomic arrangement. Stacking introduces dispersion to an otherwise flat band structure of the materials, which appeared to be highly sensitive to stacking direction. The effect of stacking was similar for each COF, but the magnitude of band structure change was different and dependent on the symmetry of the building blocks.
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Affiliation(s)
- Mateusz Wlazło
- Next-Generation
Energy Systems Group, Centre of Excellence
ENSEMBLE3, Wólczyńska 133, Warsaw 01-919, Poland
| | - Keiichiro Maegawa
- Next-Generation
Energy Systems Group, Centre of Excellence
ENSEMBLE3, Wólczyńska 133, Warsaw 01-919, Poland
- Department
of Electrical and Electronic Information Engineering, Toyohashi University of Tech-nology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi 441-8580, Japan
| | - Atsushi Nagai
- Next-Generation
Energy Systems Group, Centre of Excellence
ENSEMBLE3, Wólczyńska 133, Warsaw 01-919, Poland
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9
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Bunno T, Maegawa K, Wlazło M, Hikima K, Nagai A, Matsuda A. Ternary Triazole-Based Organic-Inorganic Proton-Conducting Hybrids Based on Computational Models for HT-PEMFC Application. ACS Omega 2023; 8:44172-44182. [PMID: 38027392 PMCID: PMC10666242 DOI: 10.1021/acsomega.3c06587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 10/10/2023] [Accepted: 10/24/2023] [Indexed: 12/01/2023]
Abstract
We reported a new ternary hybrid anhydrous proton-conducting material based on triazole (Tz), wherein it interacted with TiO2 and cesium hydrogen sulfate (CHS) constructed based on the acid-base interaction. It exhibited high proton conductivity derived by the two acid-base interactions: between CHS and Tz and between Tz and TiO2. As a starting point of discussion, we attempted to theoretically predict the high/low proton conductivity using the push-pull protonated atomic distance (PAD) law, which makes it possible to predict the proton conductivity in the acid-base part based on density functional theory. The calculations indicate the possibility of achieving higher proton conductivity in the ternary composites (CHS·Tz-TiO2) involving two acid-base interactions than in binary hybrids, such as CHS·Tz and TiO2-Tz composites, suggesting the positive effect of two simultaneous acid-base interactions for achieving high proton conductivity. This result is supported by the experimental result with respect to synthesized materials obtained using the mechanochemical method. Adding TiO2 to the CHS·Tz system causes a change in the CHS·Tz interaction and promotes proton dissociation, producing a new and fast proton-conducting layer through the formation of Tz-TiO2 interaction. Applying CHS·Tz-TiO2 to high-temperature proton exchange membrane fuel cells results in improved membrane conductivity and power-generation properties at 150 °C under anhydrous conditions.
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Affiliation(s)
- Towa Bunno
- Department
of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi 441-8580, Japan
| | - Keiichiro Maegawa
- Department
of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi 441-8580, Japan
- Next-Generation
Energy Systems Group, Centre of Excellence
ENSEMBLE3 sp. z o.o., Wolczynska 133, Warsaw 01-919, Poland
| | - Mateusz Wlazło
- Next-Generation
Energy Systems Group, Centre of Excellence
ENSEMBLE3 sp. z o.o., Wolczynska 133, Warsaw 01-919, Poland
| | - Kazuhiro Hikima
- Department
of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi 441-8580, Japan
| | - Atsushi Nagai
- Next-Generation
Energy Systems Group, Centre of Excellence
ENSEMBLE3 sp. z o.o., Wolczynska 133, Warsaw 01-919, Poland
| | - Atsunori Matsuda
- Department
of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi 441-8580, Japan
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10
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Ishihara M, Abe S, Imaoka K, Nakagawa T, Kadota K, Oguro H, Nakajima H, Yamaguchi S, Nagai A. Meningoencephalomyelitis Caused by Brucella Canis: A Case Report and Literature Review. Intern Med 2023:2664-23. [PMID: 37926538 DOI: 10.2169/internalmedicine.2664-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2023] Open
Abstract
Human brucellosis, one of the most common zoonoses worldwide, is rare in Japan. Brucella canis is the specific pathogen of human brucellosis carried by dogs. According to an epidemiological study of B. canis infection in Japan, B. canis is the specific pathogen of human brucellosis in dogs. We herein report a rare case of meningoencephalomyelitis caused by B. canis in a 68-year-old Japanese man. Neurobrucellosis was diagnosed based on a serum tube agglutination test and abnormal cerebrospinal fluid findings. The patient was started on targeted treatment with a combination of doxycycline and streptomycin. Although extremely rare, neurobrucellosis should be considered in patients with a fever of unknown origin and unexplained neurological symptoms.
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Affiliation(s)
- Masaki Ishihara
- Division of Neurology, Department of Medicine, Nihon University School of Medicine, Japan
- Department of Neurology, Faculty of Medicine, Shimane University, Japan
| | - Satoshi Abe
- Department of Neurology, Faculty of Medicine, Shimane University, Japan
| | - Koichi Imaoka
- Department of Veterinary Science, National Institute of Infectious Diseases, Japan
| | - Tomonori Nakagawa
- Department of Neurology, Faculty of Medicine, Shimane University, Japan
- Department of Neurology, Masuda Red Cross Hospital, Japan
| | - Katsuhiko Kadota
- Department of Neurology, Faculty of Medicine, Shimane University, Japan
- Department of Emergency and Disaster Medicine, Graduate School of Medicine, Juntendo University, Japan
| | - Hiroaki Oguro
- Department of Neurology, Faculty of Medicine, Shimane University, Japan
- Department of Neurology, Heisei Memorial Hospital, Japan
| | - Hideto Nakajima
- Division of Neurology, Department of Medicine, Nihon University School of Medicine, Japan
| | - Shuhei Yamaguchi
- Department of Neurology, Faculty of Medicine, Shimane University, Japan
- Shimane Prefecture Bureau, Shimane Prefectural Central Hospital, Japan
| | - Atsushi Nagai
- Department of Neurology, Faculty of Medicine, Shimane University, Japan
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11
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Joseph V, Nagai A. Recent advancements of covalent organic frameworks (COFs) as proton conductors under anhydrous conditions for fuel cell applications. RSC Adv 2023; 13:30401-30419. [PMID: 37849707 PMCID: PMC10578502 DOI: 10.1039/d3ra04855a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 10/11/2023] [Indexed: 10/19/2023] Open
Abstract
Recent electrochemical energy conversion devices require more advanced proton conductors for their broad applications, especially, proton exchange membrane fuel cell (PEMFC) construction. Covalent organic frameworks (COFs) are an emerging class of organic porous crystalline materials that are composed of organic linkers and connected by strong covalent bonds. The unique characteristics including well-ordered and tailorable pore channels, permanent porosity, high degree of crystallinity, excellent chemical and thermal stability, enable COFs to be the potential proton conductors in fuel cell devices. Generally, proton conduction of COFs is dependent on the amount of water (extent of humidity). So, the constructed fuel cells accompanied complex water management system which requires large radiators and airflow for their operation at around 80 °C to avoid overheating and efficiency roll-off. To overcome such limitations, heavy-duty fuel cells require robust proton exchange membranes with stable proton conduction at elevated temperatures. Thus, proton conducting COFs under anhydrous conditions are in high demand. This review summarizes the recent progress in emerging COFs that exhibit proton conduction under anhydrous conditions, which may be prospective candidates for solid electrolytes in fuel cells.
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Affiliation(s)
| | - Atsushi Nagai
- Ensemble3 - Centre of Excellence Wólczyńska 133 01-919 Warszawa Poland
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12
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Matsuo R, Fujita K, Yakushiji K, Gondo T, Tanaka R, Nagai A. Relationship Between Oral Health, Quality of Life, and Comprehensive Health Literacy in Community-Dwelling Older Adults. Res Theory Nurs Pract 2023:RTNP-2022-0135.R1. [PMID: 37380221 DOI: 10.1891/rtnp-2022-0135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/30/2023]
Abstract
Background and purpose: Oral health affects systemic health and the importance of maintaining good oral health is acknowledged. The high prevalence of oral diseases is associated with low health literacy (HL). Therefore, the purpose of this study was to investigate whether comprehensive HL in community-dwelling older adults is associated with objective oral hygiene and oral health-related quality of life (OHRQoL). Methods: Participants aged ≥65 years completed a self-administered questionnaire. On the same day, data collected with the oral health assessment tool were used to assess participants' objective oral status. The questionnaire included the general oral health assessment index to measure OHRQoL and the short version of the European Health Literacy Survey Questionnaire to assess comprehensive HL. Data were analyzed by univariate and multiple logistic regression. Results: In total, 145 people consented to participate in this study, of whom 118 (81.4%) responded effectively. Of the 118 participants, 18% recorded a rating of "unhealthy" for oral cleanliness in objective oral hygiene. Multiple logistic regression analysis identified comprehensive HL as a related factor for both oral cleanliness and OHRQoL (odds ratio = 5.00 and 3.33, p < 0.01 and p < 0.05, respectively). Implications for Practice: These findings indicate that comprehensive HL changes clinical outcomes. Because older adults often have comorbidities as well as oral health problems, it is important for nurses to assess HL during follow-up for comorbidities and take the opportunity to provide personalized oral health guidance and improve OHRQoL.
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Affiliation(s)
- Rika Matsuo
- Department of Health Sciences, Graduate School of Medicine, Kyushu University, Fukuoka, Japan
- Department of Nursing, School of Nursing, Fukuoka Nursing College, Fukuoka, Japan
| | - Kimie Fujita
- Division of Health Sciences, Graduate School of Medicine, Kyushu University, Fukuoka, Japan
| | - Kanako Yakushiji
- Division of Health Sciences, Graduate School of Medicine, Kyushu University, Fukuoka, Japan
| | - Tae Gondo
- Department of Nursing, School of Nursing, Daiichi University of Pharmacy, Fukuoka, Japan
| | - Rumi Tanaka
- Department of Nursing, School of Nursing, Kitasato University, Tokyo, Japan
| | - Atsushi Nagai
- The Regional Liaison Center for Fukuoka Dental College-Fukuoka Nursing College-Fukuoka College for Health Science, Fukuoka Dental College, Fukuoka, Japan
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13
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Iwasa K, Onoda K, Takamura M, Takayoshi H, Mitaki S, Yamaguchi S, Nagai A. Development of a stroke risk score with MRI asymptomatic brain lesions attributes to evaluate prognostic vascular events. J Neurol Sci 2023; 448:120642. [PMID: 37030186 DOI: 10.1016/j.jns.2023.120642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 03/24/2023] [Accepted: 03/31/2023] [Indexed: 04/05/2023]
Abstract
BACKGROUND The use of a combination of stroke predictors, such as clinical factors and asymptomatic lesions on brain magnetic resonance imaging (MRI), may improve the accuracy of stroke risk prediction. Therefore, we attempted to develop a stroke risk score for healthy individuals. METHODS We investigated the presence of cerebral stroke in 2365 healthy individuals who underwent brain dock screening at the Health Science Center in Shimane. We examined the factors that contributed to stroke and attempted to determine the risk of stroke by comparing background factors and MRI findings. RESULTS The following items were found to be significant risk factors for stroke: age (≥60 years), hypertension, subclinical cerebral infarction, deep white matter lesion, and microbleeds. Each item was scored with 1 point, and the hazard ratios for the risk of developing stroke based on the group with 0 points were 17.2 (95% confidence interval [CI] 2.31-128) for 3 points, 18.1 (95% CI 2.03-162) for 4 points, and 102 (95% CI 12.6-836) for 5 points. CONCLUSIONS A precise stroke prediction score biomarker can be obtained by combining MRI findings and clinical factors.
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Affiliation(s)
- Kenichi Iwasa
- Department of Neurology, Faculty of Medicine, Shimane University, Japan.
| | - Keiichi Onoda
- Department of Psychology, Faculty of Psychology, Otemon Gakuin University, Japan
| | - Masahiro Takamura
- Department of Neurology, Faculty of Medicine, Shimane University, Japan
| | | | - Shingo Mitaki
- Department of Neurology, Faculty of Medicine, Shimane University, Japan
| | - Shuhei Yamaguchi
- Department of Neurology, Shimane Prefectural Central Hospital, Japan
| | - Atsushi Nagai
- Department of Neurology, Faculty of Medicine, Shimane University, Japan
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14
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Sheikh AM, Yano S, Tabassum S, Mitaki S, Michikawa M, Nagai A. Alzheimer's Amyloid β Peptide Induces Angiogenesis in an Alzheimer's Disease Model Mouse through Placental Growth Factor and Angiopoietin 2 Expressions. Int J Mol Sci 2023; 24:ijms24054510. [PMID: 36901941 PMCID: PMC10003449 DOI: 10.3390/ijms24054510] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 02/22/2023] [Accepted: 02/22/2023] [Indexed: 03/02/2023] Open
Abstract
Increased angiogenesis, especially the pathological type, has been documented in Alzheimer's disease (AD) brains, and it is considered to be activated due to a vascular dysfunction-mediated hypoxic condition. To understand the role of the amyloid β (Aβ) peptide in angiogenesis, we analyzed its effects on the brains of young APP transgenic AD model mice. Immunostaining results revealed that Aβ was mainly localized intracellularly, with very few immunopositive vessels, and there was no extracellular deposition at this age. Solanum tuberosum lectin staining demonstrated that compared to their wild-type littermates, the vessel number was only increased in the cortex of J20 mice. CD105 staining also showed an increased number of new vessels in the cortex, some of which were partially positive for collagen4. Real-time PCR results demonstrated that placental growth factor (PlGF) and angiopoietin 2 (AngII) mRNA were increased in both the cortex and hippocampus of J20 mice compared to their wild-type littermates. However, vascular endothelial growth factor (VEGF) mRNA did not change. Immunofluorescence staining confirmed the increased expression of PlGF and AngII in the cortex of the J20 mice. Neuronal cells were positive for PlGF and AngII. Treatment of a neural stem cell line (NMW7) with synthetic Aβ1-42 directly increased the expression of PlGF and AngII, at mRNA levels, and AngII at protein levels. Thus, these pilot data indicate that pathological angiogenesis exists in AD brains due to the direct effects of early Aβ accumulation, suggesting that the Aβ peptide regulates angiogenesis through PlGF and AngII expression.
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Affiliation(s)
- Abdullah Md. Sheikh
- Department of Laboratory Medicine, Shimane University School of Medicine, 89-1 Enya Cho, Izumo 693-8501, Japan
- Correspondence: (A.M.S.); (A.N.); Tel.: +81-0853-20-2306 (A.M.S.); +81-0853-20-2198 (A.N.)
| | - Shozo Yano
- Department of Laboratory Medicine, Shimane University School of Medicine, 89-1 Enya Cho, Izumo 693-8501, Japan
| | - Shatera Tabassum
- Department of Laboratory Medicine, Shimane University School of Medicine, 89-1 Enya Cho, Izumo 693-8501, Japan
| | - Shingo Mitaki
- Department of Neurology, Shimane University School of Medicine, 89-1 Enya Cho, Izumo 693-8501, Japan
| | - Makoto Michikawa
- Department of Biochemistry, Graduate School of Medical Sciences, Nagoya City University, Nagoya 467-8601, Japan
| | - Atsushi Nagai
- Department of Laboratory Medicine, Shimane University School of Medicine, 89-1 Enya Cho, Izumo 693-8501, Japan
- Department of Neurology, Shimane University School of Medicine, 89-1 Enya Cho, Izumo 693-8501, Japan
- Correspondence: (A.M.S.); (A.N.); Tel.: +81-0853-20-2306 (A.M.S.); +81-0853-20-2198 (A.N.)
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15
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Bhuiya J, Notsu Y, Kobayashi H, Shibly AZ, Sheikh AM, Okazaki R, Yamaguchi K, Nagai A, Nabika T, Abe T, Yamasaki M, Isomura M, Yano S. Neither Trimethylamine-N-Oxide nor Trimethyllysine Is Associated with Atherosclerosis: A Cross-Sectional Study in Older Japanese Adults. Nutrients 2023; 15:nu15030759. [PMID: 36771464 PMCID: PMC9921512 DOI: 10.3390/nu15030759] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 01/26/2023] [Accepted: 01/29/2023] [Indexed: 02/05/2023] Open
Abstract
Recent evidence suggests that trimethylamine-N-oxide (TMAO), a metabolite of L-carnitine and choline, is linked to atherosclerosis and cardiovascular diseases. As TMAO content is very high in fish, we raised the following question: why do Japanese people, who consume lots of fish, show a low risk of atherosclerosis? To address this question, we investigated the effects of TMAO and other L-carnitine-related metabolites on carotid intima-media thickness (IMT). Participants were recruited from a small island and a mountainous region. Plasma L-carnitine, γ-butyrobetaine (γBB), TMAO, trimethyllysine (TML), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA) levels were measured using liquid or gas chromatography-mass spectrometry. Plasma L-carnitine concentration was higher in men than in women. TMAO and TML were significantly higher in the residents of the island than in the mountainous people. In multiple linear regression analyses in all participants, TML showed a significant inverse association with max-IMT and plaque score (PS), whereas TMAO did not show any associations. In women, L-carnitine was positively associated with max-IMT and PS. TMAO was correlated with both EPA and DHA levels, implying that fish is a major dietary source of TMAO in Japanese people. Our study found that plasma TMAO was not an apparent risk factor for atherosclerosis in elderly Japanese people, whereas a low level of TML might be a potential risk. L-carnitine may be a marker for atherosclerosis in women.
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Affiliation(s)
- Jubo Bhuiya
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo City 693-8501, Japan
| | - Yoshitomo Notsu
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo City 693-8501, Japan
- Metabolizumo Project, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo City 693-8501, Japan
| | - Hironori Kobayashi
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo City 693-8501, Japan
- Metabolizumo Project, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo City 693-8501, Japan
| | - Abu Zaffar Shibly
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo City 693-8501, Japan
| | - Abdullah Md. Sheikh
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo City 693-8501, Japan
| | - Ryota Okazaki
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo City 693-8501, Japan
| | - Kazuto Yamaguchi
- Department of Cardiology, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo City 693-8501, Japan
| | - Atsushi Nagai
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo City 693-8501, Japan
| | - Toru Nabika
- Metabolizumo Project, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo City 693-8501, Japan
- Center for Community-Based Healthcare Research and Education (CoHRE), Shimane University, 89-1 Enya-cho, Izumo City 693-8501, Japan
| | - Takafumi Abe
- Center for Community-Based Healthcare Research and Education (CoHRE), Shimane University, 89-1 Enya-cho, Izumo City 693-8501, Japan
| | - Masayuki Yamasaki
- Center for Community-Based Healthcare Research and Education (CoHRE), Shimane University, 89-1 Enya-cho, Izumo City 693-8501, Japan
| | - Minoru Isomura
- Center for Community-Based Healthcare Research and Education (CoHRE), Shimane University, 89-1 Enya-cho, Izumo City 693-8501, Japan
| | - Shozo Yano
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo City 693-8501, Japan
- Center for Community-Based Healthcare Research and Education (CoHRE), Shimane University, 89-1 Enya-cho, Izumo City 693-8501, Japan
- Correspondence: ; Tel.: +81-0853-20-2312; Fax: +81-0853-20-2409
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16
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Noda K, Hattori Y, Hori M, Tanaka A, Nagai A, Harada-Shiba M, Yamaguchi S, Ihara M. Abstract WP194: The Prevalence Of Intracranial Artery Stenosis And Ischemic Stroke In Familial Hypercholesterolemia: A Retrospective Cohort Study. Stroke 2023. [DOI: 10.1161/str.54.suppl_1.wp194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Introduction:
Familial hypercholesterolemia (FH) is an autosomal dominant genetic disorder, characterized by the early-onset elevation of LDL cholesterol (LDL-C) levels and premature coronary artery disease (CAD). Although the association between FH and CAD is well known, that between FH and cerebrovascular diseases including stroke and intracranial artery stenosis (ICAS) is still unclear. We hypothesized that long-standing excessive LDL-C levels in FH patients confer an increased risk of developing ICAS, and consequently FH patients are subject to ischemic stroke (IS). The aim of our study is to unveil the relationship between FH and cerebrovascular diseases including ICAS and IS.
Methods:
The associations of FH and high LDL-C with IS and ICAS were tested in neurologically normal subjects (NNS) who voluntarily underwent brain MRI from December 2000 to September 2011 at Health Science Center in Shimane, Japan, and FH patients who underwent brain MRI at National Cerebral and Cardiovascular Center in Japan from May 2005 to March 2020. The severity of ICAS was evaluated with MRA.
Results:
We enrolled 3181 NNS and 167 FH patients with the mean age of 62.3±0.2 and 61.5±1.3, respectively (
p
= 0.10). There were 1159 females (46.2%) in NNS and 89 (53.3%) in FH patients (
p
= 0.075). The prevalence of ICAS in the FH patients was significantly higher than in the NNS (5.7% vs. 37.1%,
p
< 0.001), and the incidence of IS was also higher in the FH patients (0.8% vs. 10.8%, p<0.001). Multiple regression analysis revealed that FH was an independent predictor for IS (OR 13.96, 95%CI 6.60-29.55,
p
< 0.001). Kaplan-Meier analysis showed a significant difference in the incidence of IS between the NNS and FH patients (
p
< 0.001). Moreover, the presence of ICAS significantly associated with the incidence of IS in the FH patients (Cox regression analysis: HR 6.55, 95%CI 1.66-25.78,
p
= 0.007).
Discussion:
Our study demonstrated a significantly higher prevalence of ICAS in FH patients than control subjects with similar age. Moreover, ICAS conferred an increased risk of IS among the FH patients. These results may necessitate routine examinations of the brain as well as systemic arteries in FH patients. We conclude a positive relationship of FH with cerebrovascular diseases, including ICAS and IS.
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Affiliation(s)
- Kotaro Noda
- Dept of Neurology, National Cerebral and Cardiovascular Cntr, Suita Osaka, Japan
| | | | - Mika Hori
- Dept of Endocrinology, Rsch Institute of Environmental Medicine, Nagoya Univ, Nagoya, Japan
| | - Akito Tanaka
- National Cerebral and Cardiovascular Cntr, Suita, Osaka, Japan
| | - Atsushi Nagai
- Dept of Neurology, Shimane Univ Sch of Medicine, Shimane, Japan
| | - Mariko Harada-Shiba
- Dept of Molecular Innovation in Lipidology, National Cerebral and Cardiovascular Cntr, Suita Osaka, Japan
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17
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Abe S, Onoda K, Takamura M, Nitta E, Nagai A, Yamaguchi S. Altered Feedback-Related Negativity in Mild Cognitive Impairment. Brain Sci 2023; 13:brainsci13020203. [PMID: 36831745 PMCID: PMC9953936 DOI: 10.3390/brainsci13020203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 01/19/2023] [Accepted: 01/23/2023] [Indexed: 01/27/2023] Open
Abstract
INTRODUCTION Feedback-related negativity (FRN) is electrical brain activity related to the function of monitoring behavior and its outcome. FRN is generated by negative feedback input, such as punishment or monetary loss, and its potential is distributed maximally over the frontal-central part of the skull. Our previous study demonstrated that FRN latency was delayed and that the amplitude was increased in patients with mild Alzheimer's disease (AD). As mild cognitive impairment (MCI) is considered to be a prodromal stage of AD, we speculated that FRN would also be altered in MCI, as in AD. The aim of this study is to examine whether MCI patients showed changes in FRN during a gambling task. METHODS Thirteen MCI patients and thirteen age-matched healthy elderly individuals participated in a simple gambling task and underwent neuro-psychological assessments. The participants were asked to choose one out of two options and randomly received positive or negative feedback to their response. An EEG was recorded during the task, and FRN was obtained by subtracting the positive feedback-related activity from the negative feedback-related activity. RESULTS The reaction time to probe stimuli was comparable in the two groups. The group comparisons revealed that the FRN amplitude was significantly larger for the MCI group than for the healthy elderly (F(1,24) = 6.4, ηp2 = 0.22, p = 0.019), but there was no group difference in the FRN latency. The FRN amplitude at the frontocentral electrode positively correlated with the mini-mental state examination score (Spearman's rhopartial = 0.41, p = 0.043). The finding of increased FRN amplitude in MCI was consistent with the previous finding in AD. CONCLUSION Our findings indicate that monitoring dysfunction might also be involved in the prodromal stage of dementia.
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Affiliation(s)
- Satoshi Abe
- Department of Neurology, Faculty of Medicine, Shimane University, Izumo, Shimane 693-8501, Japan
- Correspondence:
| | - Keiichi Onoda
- Department of Psychology, Otemon Gakuin University, Ibaraki, Osaka 567-8502, Japan
| | - Masahiro Takamura
- Department of Neurology, Faculty of Medicine, Shimane University, Izumo, Shimane 693-8501, Japan
| | - Eri Nitta
- Laboratory Medicine, Shimane University Hospital, Izumo, Shimane 693-8501, Japan
| | - Atsushi Nagai
- Department of Neurology, Faculty of Medicine, Shimane University, Izumo, Shimane 693-8501, Japan
| | - Shuhei Yamaguchi
- Department of Neurology, Shimane Prefectural Central Hospital, Izumo, Shimane 693-8555, Japan
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18
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Shibly AZ, Sheikh AM, Michikawa M, Tabassum S, Azad AK, Zhou X, Zhang Y, Yano S, Nagai A. Analysis of Cerebral Small Vessel Changes in AD Model Mice. Biomedicines 2022; 11:50. [PMID: 36672558 PMCID: PMC9855388 DOI: 10.3390/biomedicines11010050] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 12/19/2022] [Accepted: 12/21/2022] [Indexed: 12/28/2022] Open
Abstract
Amyloid β (Aβ) peptide is deposited in the brains of sporadic Alzheimer's disease (AD) due to impaired vessel-dependent clearance. To understand the mechanisms, we investigated time-dependent cerebrovascular changes in AD model mice. Cerebrovascular and other pathological changes were analyzed in AD model mice (J20 strain) aging from 2 to 9 months by immunostaining. At 2 months, Aβ was only intraneuronal, whereas vessels were positive from 3 months in J20 mice. Compared to wild-type (WT), vessel density was increased at 2 months but decreased at 9 months in J20 mice, claudin-5 levels were decreased, and vascular endothelial growth factor (VEGF) levels were increased in the cortex and hippocampus of J20 mice brain at all time points. Albumin extravasation was evident from 3 months in J20 brains. Collagen 4 was increased at 2 and 3 months. Aquaporin 4 was spread beyond the vessels starting from 3 months in J20, which was restricted around the vessel in wild-type mice. In conclusion, the study showed that an early decrease in claudin-5 was associated with VEGF expression, indicating dysfunction of the blood-brain barrier. Decreased claudin-5 might cause the leakage of blood constituents into the parenchyma that alters astrocyte polarity and its functions.
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Affiliation(s)
- Abu Zaffar Shibly
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo 693-8501, Japan; (A.Z.S.); (A.K.A.); (X.Z.); (Y.Z.)
- Department of Biotechnology and Genetic Engineering, Mawlana Bhashani Science and Technology University, Santosh, Tangail 1902, Bangladesh
| | - Abdullah Md. Sheikh
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo 693-8501, Japan; (A.M.S.); (S.T.); (S.Y.)
| | - Makoto Michikawa
- Department of Biochemistry, Graduate School of Medical Sciences, Nagoya City University, Nagoya 467-8601, Japan;
| | - Shatera Tabassum
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo 693-8501, Japan; (A.M.S.); (S.T.); (S.Y.)
| | - Abul Kalam Azad
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo 693-8501, Japan; (A.Z.S.); (A.K.A.); (X.Z.); (Y.Z.)
| | - Xiaojing Zhou
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo 693-8501, Japan; (A.Z.S.); (A.K.A.); (X.Z.); (Y.Z.)
| | - Yuchi Zhang
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo 693-8501, Japan; (A.Z.S.); (A.K.A.); (X.Z.); (Y.Z.)
| | - Shozo Yano
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo 693-8501, Japan; (A.M.S.); (S.T.); (S.Y.)
| | - Atsushi Nagai
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo 693-8501, Japan; (A.Z.S.); (A.K.A.); (X.Z.); (Y.Z.)
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19
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Abe T, Yoshida N, Shimada T, Nakashima M, Nagai A. Respiratory frequency-tunable dynamic imaging for lung function: New exam method using chest X-ray cine imaging considering various respiratory diseases. PLoS One 2022; 17:e0276859. [PMID: 36395105 PMCID: PMC9671319 DOI: 10.1371/journal.pone.0276859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 10/14/2022] [Indexed: 11/19/2022] Open
Abstract
Objectives A convenient way to conduct pulmonary function tests while preventing infectious diseases was proposed, together with countermeasures for severe coronavirus disease 2019 (COVID-19). The correlation between diagnosis result and diagnosis result was examined for patients with mild chronic obstructive pulmonary disease (COPD) of the most abounding as a subject of spirometry, and the possibility of using this method as an alternative to spirometry was examined. Setting This study was conducted in Kanagawa, Japan. Participants Ten normal volunteers and 15 volunteers with mild COPD participated in this study. Outcome measures All images were taken by EXAVISTA (Hitachi, Japan) between October 2019 and February 2020. Continuous fluoroscopic images were taken in 12.5 frames per second for 10–20 s per subject. Images that do not adopt the automatic image processing of the equipment and only carry out the signal correction of each pixel were used for the analysis. Results The mean total dose for all volunteers was 0.2 mGy. There was no major discrepancy in the detection of lung field geometry, and no diagnostic problems were noted by the radiologist and physician. Conclusions Existing X-ray cine imaging was used to extract frequency-tunable imaging. It is possible to identify abnormal regions on the images compared to spirometry, and it does not require maximum effort respiration; therefore, it is possible to perform a stable examination because the patient’s physical condition and the ability of laboratory technicians on the day are less affected. This can also be used as a countermeasure in examining patients with infectious diseases. Trial registration UMIN UMIN000043868.
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Affiliation(s)
- Takehiko Abe
- Department of Radiology, Teikyo University, Itabashi-ku, Tokyo, Japan
- Radwisp Pte. Ltd, The Central, Singapore, Singapore
- * E-mail:
| | - Norifumi Yoshida
- Department of Radiology, Teikyo University, Itabashi-ku, Tokyo, Japan
- Radwisp Pte. Ltd, The Central, Singapore, Singapore
| | - Tetsuo Shimada
- Faculty of Engineering, Sanjo City University, Sanjo, Niigata, Japan
| | - Masanao Nakashima
- Department of Respiratory Medicine, Shin-Yurigaoka General Hospital, Asao-ku, Kawasaki, Kanagawa, Japan
| | - Atsushi Nagai
- Department of Respiratory Medicine, Shin-Yurigaoka General Hospital, Asao-ku, Kawasaki, Kanagawa, Japan
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20
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Watanabe T, Suzuki A, Ohira S, Go S, Ishizuka Y, Moriya T, Miyaji Y, Nakatsuka T, Hirata K, Nagai A, Matsuda J. The Urinary Bladder is Rich in Glycosphingolipids Composed of Phytoceramides. J Lipid Res 2022; 63:100303. [PMID: 36441023 PMCID: PMC9708920 DOI: 10.1016/j.jlr.2022.100303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 10/10/2022] [Accepted: 10/12/2022] [Indexed: 11/27/2022] Open
Abstract
Glycosphingolipids (GSLs) are composed of a polar glycan chain and a hydrophobic tail known as ceramide. Together with variation in the glycan chain, ceramides exhibit tissue-specific structural variation in the long-chain base (LCB) and N-acyl chain moieties in terms of carbon chain length, degree of desaturation, and hydroxylation. Here, we report the structural variation in GSLs in the urinary bladders of mice and humans. Using TLC, we showed that the major GSLs are hexosylceramide, lactosylceramide, globotriaosylceramide, globotetraosylceramide, Neu5Ac-Gal-Glc-Ceramide, and Neu5Ac-Neu5Ac-Gal-Glc-Ceramide. Our LC-MS analysis indicated that phytoceramide structures with a 20-carbon LCB (4-hydroxyeicosasphinganine) and 2-hydroxy fatty acids are abundant in hexosylceramide and Neu5Ac-Gal-Glc-Ceramide in mice and humans. In addition, quantitative PCR demonstrated that DES2 and FA2H, which are responsible for the generation of 4-hydroxysphinganine and 2-hydroxy fatty acid, respectively, and SPTLC3 and SPTSSB, which are responsible for the generation of 20-carbon LCBs, showed significant expressions in the epithelial layer than in the subepithelial layer. Immunohistochemically, dihydroceramide:sphinganine C4-hydroxylase (DES2) was expressed exclusively in urothelial cells of the urinary bladder. Our findings suggest that these ceramide structures have an impact on membrane properties of the stretching and shrinking in transitional urothelial cells.
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Affiliation(s)
- Takashi Watanabe
- Department of Pathophysiology and Metabolism, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Akemi Suzuki
- Institute of Molecular Biomembrane and Glycobiology, Tohoku Medical and Pharmaceutical University, Sendai, Miyagi, Japan
| | - Shin Ohira
- Department of Urology, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Shinji Go
- Department of Pathophysiology and Metabolism, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Yuta Ishizuka
- Department of Pathophysiology and Metabolism, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Takuya Moriya
- Department of Pathology, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Yoshiyuki Miyaji
- Department of Urology, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Tota Nakatsuka
- Department of Urology, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Keita Hirata
- Department of Urology, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Atsushi Nagai
- Department of Urology, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Junko Matsuda
- Department of Pathophysiology and Metabolism, Kawasaki Medical School, Kurashiki, Okayama, Japan,For correspondence: Junko Matsuda
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Nagai A, Nagai T, Yaguchi H, Fujii S, Horiuchi K, Ura S, Shirai S, Iwata I, Matsushima M, Anzai T, Yabe I. VP.45 Clinical features of anti-mitochondrial M2 antibody-positive myositis: Case series of 17 patients. Neuromuscul Disord 2022. [DOI: 10.1016/j.nmd.2022.07.176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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22
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Sheikh AM, Yano S, Mitaki S, Tabassum S, Yamaguchi S, Nagai A. Rho-Kinase inhibition decreases focal cerebral ischemia-induced glial activation in rats. J Cent Nerv Syst Dis 2022; 14:11795735221123910. [PMID: 36106069 PMCID: PMC9465613 DOI: 10.1177/11795735221123910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 08/05/2022] [Indexed: 11/17/2022] Open
Abstract
Background Rho-kinase inhibition in a rat middle cerebral artery occlusion (MCAO) model
is reported to improve neurological functions and decrease infarction
size. Objective The objective of this study is to investigate the underlying mechanisms of
such improvement by evaluating the effects of Rho-kinase inhibition on
astrocytes and microglial accumulation and activation in this condition. Methods Adult male Sprague-Dawley (SD) rats were used to generate the MCAO model,
which received an I.P injection of a chemical Rho-kinase inhibitor (Fasudil-
5 mg/kg/day) or vehicle (PBS) for 2 and 4 days. Results Fasudil treatment significantly decreased the stroke volumes and water
content in the lesion areas, as revealed by MRI. Immunostaining and Western
blotting results demonstrated that Fasudil significantly decreased the
levels of Aquaporin-4, a water channel protein. The number of
GFAP+ astrocytes and Iba-1+ macrophage/microglia
was decreased in the lesion areas. Proinflammatory transcription factor
NF-κB protein levels were decreased in the Fasudil group 2 days after MCAO.
Also, proinflammatory mediators including TNF-α, IL-1β, and iNOS levels were
decreased. In vitro migration study using a human microglial cell line
(HMO6) confirmed the inhibitory effects of Fasudil on the process. Fasudil
also decreased combined IL-1β and IFNγ-induced NF-κB nuclear translocation
in HMO6. Moreover, Fasudil transiently decreased combined IL-1β and
IFNγ-induced iNOS, TNFα, and IL-1β mRNA levels in HMO6. Conclusion Our study demonstrates the inhibitory effects of Rho-kinase on NF-κB-mediated
glial activation and cerebral edema, which might be a promising therapeutic
target in acute cerebral ischemia conditions.
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Affiliation(s)
- Abdullah Md Sheikh
- Department of Laboratory Medicine, Shimane University Faculty of Medicine, Izumo, Japan
| | - Shozo Yano
- Department of Laboratory Medicine, Shimane University Faculty of Medicine, Izumo, Japan
| | - Shingo Mitaki
- Department of Neurology, Shimane University Faculty of Medicine, Izumo, Japan
| | - Shatera Tabassum
- Department of Laboratory Medicine, Shimane University Faculty of Medicine, Izumo, Japan
| | | | - Atsushi Nagai
- Department of Neurology, Shimane University Faculty of Medicine, Izumo, Japan
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23
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Miyata I, Nagai A. Distinctive nail pattern following androgen replacement therapy. IJU Case Rep 2022; 5:515-516. [PMID: 36341204 PMCID: PMC9626338 DOI: 10.1002/iju5.12530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 08/17/2022] [Indexed: 11/12/2022] Open
Abstract
Introduction A distinctive nail pattern in a patient undergoing androgen replacement therapy is presented hereby. Case presentation A 47‐year‐old male patient noticed a peculiar “washboard‐like” pattern on his fingernails. He had been undergoing androgen replacement therapy for late onset hypogonadism syndrome. The patient realized his nails were growing faster after his therapy was altered from a tri‐weekly basis to a bi‐weekly basis. Conclusion This phenomenon is likely to be attributed to the androgen replacement therapy, as the spacing between the ridges were widening in concordance with the strengthening of the therapy.
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Affiliation(s)
- Ippei Miyata
- Department of Pediatrics Kawasaki Medical School Okayama Japan
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24
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Komemushi A, Takashima S, Nagai A, Usui M, Fukuda M, Nakatani M, Ono Y, Maruyama T, Kariya S, Utsunomiya K, Tanigawa N. Practical Radiation Protection for Interventional Radiologist. Interv Radiol (Higashimatsuyama) 2022; 7:54-57. [PMID: 36196386 PMCID: PMC9527100 DOI: 10.22575/interventionalradiology.2022-0004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 03/22/2022] [Indexed: 06/16/2023]
Abstract
As per the International Commission on Radiological Protection 2010 recommendation, it was stated that "interventional radiologists performing difficult procedures with high workloads may be exposed to high doses" and that education and training of medical staffs in radiation exposure is "an urgent priority." There are many reports on the textbook aspects of radiation protection, but reports on the practical aspects of radiation protection have remained to be scarce. Various methods of reducing radiation exposure are described as "useful" or "can be reduced," but the priority of these methods and the "extent" to which they contribute to reducing radiation exposure are not clear. Thus, in this article, we will look into the protection of interventional radiologist from radiation exposure in a practical way, giving priority to clarity rather than academic accuracy.
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Affiliation(s)
| | | | - Atsushi Nagai
- Department of Radiology, Kansai Medical University, Japan
| | - Masakatsu Usui
- Department of Radiology, Kansai Medical University, Japan
| | | | | | - Yasuyuki Ono
- Department of Radiology, Kansai Medical University, Japan
| | | | - Shuji Kariya
- Department of Radiology, Kansai Medical University, Japan
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Asayama K, Hayashi K, Kanai Y, Tahara N, Kato Y, Abe S, Mitaki S, Nagai A. [A case of Coexistent Persistent Trigeminal and Hypoglossal Arteries Manifested with Neurovascular Compression Syndrome by Hypertension]. Brain Nerve 2022; 74:811-816. [PMID: 35676216 DOI: 10.11477/mf.1416202125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A 70-year-old woman visited our hospital with hypertension, diplopia, and right orbital pain. Neurological examination revealed right ophthalmoplegia. CT angiography and MRI identified a right persistent trigeminal artery (PTA), right persistent hypoglossal artery, and bovine aortic arch. The right internal carotid artery (ICA) was displaced laterally in the cavernous sinus due to the bifurcation of the PTA. Compression of the right oculomotor nerve, right trochlear nerve, and first division of the right trigeminal nerve by the elongated right ICA was noted and considered a potential cause of the ophthalmoplegia and orbital pain. Symptoms improved with normalization of blood pressure. During embryonic development, the right posterior communicating artery and bilateral vertebral arteries were aplastic or hypoplastic, which suggests that these carotid-basilar anastomoses may have remained as supply routes to provide sufficient blood flow to the posterior cerebral circulation. This is an extremely rare case of embryological implications manifested with neurovascular compression syndrome. (Received 6 January, 2022; Accepted 17 February, 2022; Published 1 June, 2022).
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Affiliation(s)
- Kosuke Asayama
- Department of Neurology, Shimane University Faculty of Medicine
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26
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Ohira S, Jo T, Kakumae S, Nakatsuka T, Morinaka H, Takasaki H, Hirata K, Sugiyama S, Shimizu S, Kaifu M, Fujii T, Miyaji Y, Nagai A. Long-term outcomes of testosterone replacement therapy for patients with late-onset hypogonadism syndrome. J Sex Med 2022. [DOI: 10.1016/j.jsxm.2022.03.401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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27
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Ohira S, Tone S, Nakatsuka T, Morinaka H, Takasaki H, Hirata K, Shimizu S, Nagai A. Anti-inflammatory effect of indoleamine 2,3-dioxygenase 1 inhibition for lipopolysaccharide induced epididymitis. J Sex Med 2022. [DOI: 10.1016/j.jsxm.2022.03.581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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28
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Hirata K, Ohira S, Tone S, Nakatsuka T, Morinaka H, Takasaki H, Sugiyama S, Shimizu S, Nagai A. Pathological analysis of spermatic dysfunction in testicular ischemia-reperfusion injury. J Sex Med 2022. [DOI: 10.1016/j.jsxm.2022.03.470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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29
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Shimizu S, Jo T, Kakumae S, Nakatsuka T, Morinaka H, Hirata K, Takasaki H, Sugiyama S, Ohira S, Kaifu M, Fujii T, Miyaji Y, Nagai A. Surveillance of sexual function after Robot-assisted laparoscopic radical prostatectomy. J Sex Med 2022. [DOI: 10.1016/j.jsxm.2022.03.424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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30
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Mizuhara R, Mitaki S, Takamura M, Abe S, Onoda K, Yamaguchi S, Nagai A. Pulse pressure is associated with cognitive performance in Japanese non-demented population: a cross-sectional study. BMC Neurol 2022; 22:137. [PMID: 35410174 PMCID: PMC8996505 DOI: 10.1186/s12883-022-02666-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 04/08/2022] [Indexed: 12/31/2022] Open
Abstract
Background Growing evidence suggests that vascular risk factors, especially hypertension, relate not only to cardiovascular disease but also to cognitive impairment. However, the impact of pulse pressure on cognitive function remains controversial. In this study, we evaluated the associations between pulse pressure and cognitive function in a Japanese health examination cohort using propensity matching analysis. Methods We examined 2,546 individuals with a mean age of 60.8 ± 10.3 years who voluntarily participated in health examination. Clinical variables included pulse pressure, and brain magnetic resonance imaging (MRI). We divided the participants into the high and low pulse pressure groups with a pre-defined cut-off value of 65 mmHg and evaluated their physical examination data, cognitive functions including Okabe’s test, Kohs’ test, and silent brain lesions using propensity matching. To clarify whether pulse pressure and blood pressure have different implications for cognitive function, a mediating analysis was also conducted. Results From the 2,546 subjects, 439 (17.2%) were in the high PP group. The propensity matching algorithm produced 433 pairs of patients with similar propensities. Higher pulse pressure corresponded to lower Okabe and Kohs’ scores (44.3 ± 7.1 vs 42.7 ± 7.5; p = 0.002, 97.9 ± 18.0 vs 95.0 ± 18.1 p = 0.019, respectively). The relationship between pulse pressure and cognitive impairment was not significantly mediated by systolic blood pressure. We observed no significant associations between silent brain lesions and pulse pressure. Conclusion High pulse pressure was associated with lower cognitive performance without systolic blood pressure mediation in Japanese subjects without dementia. Supplementary Information The online version contains supplementary material available at 10.1186/s12883-022-02666-6.
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Affiliation(s)
- Ryo Mizuhara
- Department of Neurology, National Hospital Organization Maizuru Medical Center, 2410 Yukinaga, Maizuru, Kyoto, 625-8502, Japan. .,Department of Neurology, Shimane University School of Medicine, 89-1 Enya-cho, Izumo, Shimane, 693-8501, Japan.
| | - Shingo Mitaki
- Department of Neurology, Shimane University School of Medicine, 89-1 Enya-cho, Izumo, Shimane, 693-8501, Japan
| | - Masahiro Takamura
- Department of Neurology, Shimane University School of Medicine, 89-1 Enya-cho, Izumo, Shimane, 693-8501, Japan
| | - Satoshi Abe
- Department of Neurology, Shimane University School of Medicine, 89-1 Enya-cho, Izumo, Shimane, 693-8501, Japan
| | - Keiichi Onoda
- Faculty of Psychology, Otemon Gakuin University, 2-1-15 Nishiai, Ibaraki, Osaka, 567-8502, Japan
| | - Shuhei Yamaguchi
- Shimane Prefectural Central Hospital, 4-1-1 Himebara, Izumo, Shimane, 693-8555, Japan
| | - Atsushi Nagai
- Department of Neurology, Shimane University School of Medicine, 89-1 Enya-cho, Izumo, Shimane, 693-8501, Japan
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Shimada A, Ohnaka S, Kubo K, Nakashima M, Nagai A. COVID-19-Associated Pulmonary Aspergillosis in a Patient Treated With Remdesivir, Dexamethasone, and Baricitinib: A Case Report. Cureus 2022; 14:e23755. [PMID: 35518522 PMCID: PMC9064704 DOI: 10.7759/cureus.23755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/02/2022] [Indexed: 12/15/2022] Open
Abstract
Remdesivir, dexamethasone, and baricitinib have recently been used to treat patients with coronavirus disease 2019 (COVID-19) and respiratory failure. However, the adverse effects of combination therapy have not been fully explored. A 64-year-old man was diagnosed with COVID-19 and was treated with remdesivir, dexamethasone, and baricitinib. His respiratory condition worsened on day 17, and in the following days, he was diagnosed with pneumomediastinum and COVID-19-associated pulmonary aspergillosis (CAPA). His condition improved with a reduction in the corticosteroid regime and antifungal treatment. This is the first case of pulmonary aspergillosis in a patient with COVID-19 that was treated with remdesivir, dexamethasone, and baricitinib.
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Affiliation(s)
- Ayako Shimada
- Department of Respiratory Medicine, Shin-Yurigaoka General Hospital, Kanagawa, JPN
| | - Shinnosuke Ohnaka
- Department of Respiratory Medicine, Shin-Yurigaoka General Hospital, Kanagawa, JPN
| | - Kosumi Kubo
- Department of Respiratory Medicine, Shin-Yurigaoka General Hospital, Kanagawa, JPN
| | - Masanao Nakashima
- Department of Respiratory Medicine, Shin-Yurigaoka General Hospital, Kanagawa, JPN
| | - Atsushi Nagai
- Department of Respiratory Medicine, Shin-Yurigaoka General Hospital, Kanagawa, JPN
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Kamitani N, Miyaji Y, Tamada T, Yoden E, Kawata Y, Watanabe K, Tokiya R, Nagai A, Katsui K. Feasibility of magnetic resonance imaging-ultrasound guided high-dose-rate brachytherapy for localized prostate cancer: Preliminary results from a prospective study. Int J Urol 2022; 29:725-732. [PMID: 35355325 DOI: 10.1111/iju.14880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 03/21/2022] [Indexed: 11/26/2022]
Abstract
OBJECTIVE This study aimed to investigate preliminary outcomes of a prospective trial of magnetic resonance imaging-ultrasound fusion-guided ultrafocal high-dose-rate brachytherapy in localized prostate cancer. METHODS In our prospective study, data from patients who underwent this treatment between April 1, 2020 and March 31, 2021 were analyzed. In the procedure, the applicator needle was inserted through the perineum to target the lesion on the multiparametric magnetic resonance imaging, which was fused onto the transrectal ultrasound image. The prescription dose was set at a single fraction of 19 Gy. Data from patients who received whole-gland high-dose-rate brachytherapy were extracted and compared with data from patients who received ultrafocal high-dose-rate brachytherapy, to evaluate the frequency of acute adverse events. RESULTS Eight patients underwent ultrafocal high-dose-rate brachytherapy with a median observation period of 7.75 months (range 5.96-15.36 months). No acute genitourinary or gastrointestinal adverse events were observed in this cohort. The planned procedure was completed in all patients, and no unexpected adverse events were observed; however, prostate-specific antigen failure was detected in one patient. In the 25 patients who underwent whole-gland high-dose-rate brachytherapy, acute genitourinary and gastrointestinal adverse events were observed in 88% and 20% of the patients, respectively. Ultrafocal high-dose-rate brachytherapy was a significant factor in avoiding acute adverse genitourinary events in univariate and multivariate analyses (P < 0.001 and P = 0.032, respectively). CONCLUSIONS Magnetic resonance imaging-ultrasound fusion-guided ultrafocal high-dose-rate brachytherapy in localized prostate cancer is a safe and feasible treatment without acute genitourinary and gastrointestinal adverse events. Long-term observation and further investigation are warranted.
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Affiliation(s)
- Nobuhiko Kamitani
- Departments of Radiology, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Yoshiyuki Miyaji
- Department of Urology, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Tsutomu Tamada
- Departments of Radiology, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Eisaku Yoden
- Departments of Radiology, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Yujiro Kawata
- Departments of Radiology, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Kenta Watanabe
- Departments of Radiology, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Ryouji Tokiya
- Departments of Radiology, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Atsushi Nagai
- Department of Urology, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Kuniaki Katsui
- Departments of Radiology, Kawasaki Medical School, Kurashiki, Okayama, Japan
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Shi C, Zhou X, Yang W, Wu J, Bai M, Zhang Y, Zhao W, Yang H, Nagai A, Yin M, Gao X, Ding S, Zhao J. Proteomic Analysis of Plasma-Derived Extracellular Vesicles From Mice With Echinococcus granulosus at Different Infection Stages and Their Immunomodulatory Functions. Front Cell Infect Microbiol 2022; 12:805010. [PMID: 35360110 PMCID: PMC8960237 DOI: 10.3389/fcimb.2022.805010] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 02/14/2022] [Indexed: 01/15/2023] Open
Abstract
The globally distributed cystic echinococcosis (CE) is caused by the larval stage of Echinococcus granulosus (E. granulosus), a cosmopolitan and zoonotic disease with potentially life-threatening complications in humans. The emerging roles for extracellular vesicles (EVs) in parasitic infection include transferring proteins and modifying host cell gene expression to modulate host immune responses. Few studies focused on the host-derived EVs and its protein profiles. We focused on the EVs from mouse infected with E. granulosus at different stages. ExoQuick kit was used for isolating EVs from mouse plasma and ExoEasy Maxi kit was used for isolating protoscolex culture supernatant (PCS) and hydatid cyst fluid (HCF). Firstly, EVs were characterized by transmission electron microscopy (TEM), nanoparticle tracking analysis (NTA) and immunoblot. Secondly, the proteins of plasma EVs were identified using liquid chromatography-tandem mass spectrometry (LC–MS/MS). The resulting LC–MS/MS data were processed using Maxquant search engine (v 1.5.2.8). Tandem mass spectra were researched against the mice and E. granulosus proteins database in the NCBI. The differentially expressed proteins are performed by proteomic label-free quantitative analysis and bioinformatics. Thirdly, in vitro experiment, the results of co-culture of plasma EVs and spleen mononuclear cells showed that 7W-EVs can increase the relative abundance of regulatory T (Treg) cells and IL-10. We further verified that EVs can be internalized by CD4+ and CD8+ T cells, B cells, and myeloid-derived suppressor cells (MDSC). These results implied host-derived EVs are multidirectional immune modulators. The findings can contribute to a better understanding of the role of host-derived EVs which are the optimal vehicle to transfer important cargo into host immune system. In addition, we have found several important proteins associated with E. granulosus and identified in infected mouse plasma at different stages. Furthermore, our study further highlighted the proteomics and immunological function of EVs from mouse infected with E. granulosus protoscoleces at different infection stages. We have laid a solid foundation for the role of EVs in cystic echinococcosis in the future research and supplemented a unique dataset for this E. granulosus.
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Affiliation(s)
- Chunli Shi
- School of Basic Medicine, Ningxia Medical University, Yinchuan, China
- Department of Molecular Biology, Shanghai Centre for Clinical Laboratory, Shanghai, China
| | - Xiaojing Zhou
- College of Clinical Medicine, Ningxia Medical University, Yinchuan, China
- Department of Neurology, Shimane University Faculty of Medicine, Izumo, Japan
| | - Wenjuan Yang
- College of Clinical Medicine, Ningxia Medical University, Yinchuan, China
| | - Jianwen Wu
- School of Basic Medicine, Ningxia Medical University, Yinchuan, China
| | - Min Bai
- School of Basic Medicine, Ningxia Medical University, Yinchuan, China
| | - Ying Zhang
- School of Basic Medicine, Ningxia Medical University, Yinchuan, China
| | - Wei Zhao
- School of Basic Medicine, Ningxia Medical University, Yinchuan, China
- Research Center for Medical Science and Technology, Ningxia Medical University, Yinchuan, China
- Ningxia Institute of Medical Science, Yinchuan, China
- Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Yinchuan, China
| | - Hui Yang
- Research Center for Medical Science and Technology, Ningxia Medical University, Yinchuan, China
- Ningxia Institute of Medical Science, Yinchuan, China
- Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Yinchuan, China
| | - Atsushi Nagai
- Department of Neurology, Shimane University Faculty of Medicine, Izumo, Japan
| | - Mei Yin
- Department of Respiratory Medicine, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Xiaoping Gao
- Department of Otolaryngology Head and Neck Surgery, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Shuqin Ding
- Department of Medical Laboratory, School of Clinical Medicine, Ningxia Medical University, Yinchuan, China
- *Correspondence: Jiaqing Zhao, ; Shuqin Ding,
| | - Jiaqing Zhao
- School of Basic Medicine, Ningxia Medical University, Yinchuan, China
- Research Center for Medical Science and Technology, Ningxia Medical University, Yinchuan, China
- Ningxia Institute of Medical Science, Yinchuan, China
- Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Yinchuan, China
- *Correspondence: Jiaqing Zhao, ; Shuqin Ding,
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Azad AK, Kobayashi H, Md Sheikh A, Osago H, Sakai H, Ahsanul Haque M, Yano S, Nagai A. Rapid identification of plasmalogen molecular species using targeted multiplexed selected reaction monitoring mass spectrometry. J Mass Spectrom Adv Clin Lab 2021; 22:26-33. [PMID: 34939052 DOI: 10.1016/j.jmsacl.2021.09.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/22/2021] [Accepted: 09/28/2021] [Indexed: 10/20/2022] Open
Abstract
Plasmalogens (Pls) levels are reported to be altered in several neurological and metabolic diseases. Identification of sn-1 fatty alcohols and sn-2 fatty acids of different Pls species is necessary to determine the roles and mechanisms of action of Pls in different diseases. Previously, full-scan tandem mass spectrometry (MS/MS) was used for this purpose but is not effective for low-abundance Pls species. Recently, multiplexed selected reaction monitoring MS (SRM/MS) was found to be more selective and sensitive than conventional full-scan MS/MS for the identification of low-abundance compounds. In the present study, we developed a liquid chromatography (LC)-targeted multiplexed SRM/MS system for the identification and quantification of different Pls choline (Pls-PC) and Pls ethanolamine (Pls-PE) species. We determined five precursor-product ion transitions to identify sn-1 and sn-2 fragments of each Pls species. Consequently, sn-1 and sn-2 fatty acyl chains of 22 Pls-PC and 55 Pls-PE species were identified in mouse brain samples. Among them, some species had C20:0 and C20:1 fatty alcohols at the sn-1 position. For quantification of Pls species in mouse brain samples, a single SRM transition was employed. Thus, our results suggest that the LC-targeted multiplexed SRM/MS system is very sensitive for the identification and quantification of low-abundance lipids such as Pls, and is thus expected to make a significant contribution to basic and clinical research in this field in the future.
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Key Words
- CS, commercial standard
- IS, internal standard
- Identification
- LC, liquid chromatography
- LC-MS/MS
- MS/MS, tandem mass spectrometry
- MTBE, methyl tert-butyl ether
- PLs, glycerophospholipids
- PUFAs, polyunsaturated fatty acids
- Phospholipids
- Plasmalogens
- Pls, plasmalogens
- Pls-PC, plasmalogens choline
- Pls-PE, plasmalogens ethanolamine
- Quantification
- RT, retention time
- SRM, selected reaction monitoring
- Targeted multiplexed SRM/MS‘
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Affiliation(s)
- Abul Kalam Azad
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya, Izumo 693-8501, Japan.,Department of Microbiology, Jagannath University, Dhaka 1100, Bangladesh
| | - Hironori Kobayashi
- Department of Pediatrics, Faculty of Medicine, Shimane University, 89-1 Enya, Izumo 693-8501, Japan.,Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya, Izumo 693-8501, Japan
| | - Abdullah Md Sheikh
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya, Izumo 693-8501, Japan
| | - Harumi Osago
- Department of Biochemistry, Faculty of Medicine, Shimane University, 89-1 Enya, Izumo 693-8501, Japan
| | - Hiromichi Sakai
- Department of Biosignaling and Radioisotope Experiment, Faculty of Medicine, Shimane University, 89-1 Enya, Izumo 693-8501, Japan
| | - Md Ahsanul Haque
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya, Izumo 693-8501, Japan.,Department of Pharmacy, University of Asia Pacific, Dhaka 1205, Bangladesh
| | - Shozo Yano
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya, Izumo 693-8501, Japan
| | - Atsushi Nagai
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya, Izumo 693-8501, Japan
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Kadota K, Onoda K, Abe S, Hamada C, Mitaki S, Oguro H, Nagai A, Kitagaki H, Yamaguchi S. Multiscale Entropy of Resting-State Functional Magnetic Resonance Imaging Differentiates Progressive Supranuclear Palsy and Multiple System Atrophy. Life (Basel) 2021; 11:life11121411. [PMID: 34947943 PMCID: PMC8707613 DOI: 10.3390/life11121411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 12/13/2021] [Accepted: 12/14/2021] [Indexed: 11/16/2022] Open
Abstract
Distinguishing progressive supranuclear palsy (PSP) from multiple system atrophy (MSA) in the early clinical stages is challenging; few sensitive and specific biomarkers are available for their differential diagnosis. Resting-state functional magnetic resonance imaging (rs-fMRI) is used to study the fluctuations in blood oxygen level-dependent (BOLD) signals at rest, which provides evidence for aberrant brain functional networks in neurodegenerative diseases. We aimed to examine whether rs-fMRI data could differentiate between PSP and MSA via a multiscale entropy (MSE) analysis of BOLD signals, which estimates the complexity of temporal fluctuations in brain activity. We recruited 14 and 18 patients with PSP and MSA, respectively, who underwent neuropsychological tests and rs-fMRI. PSP patients demonstrated greater cognitive function impairments, particularly in the frontal executive function. The bilateral prefrontal cortex revealed lower entropy BOLD signal values in multiple time scales for PSP, compared to the values observed in MSA patients; however, the functional connectivity of the representative brain networks was comparable between the diseases. The reduced complexity of BOLD signals in the prefrontal cortex was associated with frontal dysfunction. Thus, an MSE analysis of rs-fMRI could differentiate between PSP and MSA, and the reduced complexity of BOLD signals could be associated with cognitive impairment.
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Affiliation(s)
- Katsuhiko Kadota
- Department of Neurology, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (S.A.); (C.H.); (S.M.); (H.O.); (A.N.); (S.Y.)
- Correspondence: ; Tel.: +81-3-3813-3111
| | - Keiichi Onoda
- Department of Psychology, Otemon Gakuin University, Osaka 567-8502, Japan;
| | - Satoshi Abe
- Department of Neurology, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (S.A.); (C.H.); (S.M.); (H.O.); (A.N.); (S.Y.)
| | - Chizuko Hamada
- Department of Neurology, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (S.A.); (C.H.); (S.M.); (H.O.); (A.N.); (S.Y.)
| | - Shingo Mitaki
- Department of Neurology, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (S.A.); (C.H.); (S.M.); (H.O.); (A.N.); (S.Y.)
| | - Hiroaki Oguro
- Department of Neurology, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (S.A.); (C.H.); (S.M.); (H.O.); (A.N.); (S.Y.)
| | - Atsushi Nagai
- Department of Neurology, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (S.A.); (C.H.); (S.M.); (H.O.); (A.N.); (S.Y.)
| | - Hajime Kitagaki
- Department of Radiology, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan;
| | - Shuhei Yamaguchi
- Department of Neurology, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (S.A.); (C.H.); (S.M.); (H.O.); (A.N.); (S.Y.)
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Azad AK, Sheikh AM, Haque MA, Osago H, Sakai H, Shibly AZ, Yano S, Michikawa M, Hossain S, Tabassum S, A. G, Zhou X, Zhang Y, Nagai A. Time-Dependent Analysis of Plasmalogens in the Hippocampus of an Alzheimer's Disease Mouse Model: A Role of Ethanolamine Plasmalogen. Brain Sci 2021; 11:1603. [PMID: 34942905 PMCID: PMC8699479 DOI: 10.3390/brainsci11121603] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 11/23/2021] [Accepted: 11/29/2021] [Indexed: 12/26/2022] Open
Abstract
Plasmalogens are alkenyl-acyl glycerophospholipids and decreased in post-mortem Alzheimer's disease (AD) brains. The aim of this study is to investigate the time-dependent changes of plasmalogens in the hippocampus of an AD model mouse (J20). Plasmalogen levels at 3, 6, 9, 12 and 15 months were analyzed by liquid-chromatography-targeted-multiplexed-selected-reaction-monitoring-tandem-mass-spectrometry (LC-SRM/MS). Reactive oxygen species (ROS) levels were evaluated using dichlorofluorescein diacetate (DCF-DA). Plasmalogen synthesizing enzyme glycerone-phosphate O-acyltransferase (GNPAT) and late endosome marker Rab7 levels were quantified by Western blotting. GNPAT localization, changes of neuronal and glial cell numbers were evaluated by immunostaining. Compared to wild-type mice (WT), total plasmalogen-ethanolamine, but not plasmalogen-choline levels, were increased at 9 months and subsequently decreased at 15 months in J20 mice. A principal component analysis of plasmalogen-ethanolamine species could separate WT and J20 mice both at 9 and 15 months. Both GNPAT and Rab7 protein were increased in J20 mice at 9 months, whereas GNPAT was decreased at 15 months. ROS levels were increased in J20 mice except for 9 months. Our results suggest that increased plasmalogen-ethanolamine could counteract ROS levels and contribute to the phagocytosis process in J20 mice at 9 months. Such results might indicate a transient protective response of plasmalogen-ethanolamine in AD conditions.
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Affiliation(s)
- Abul Kalam Azad
- Department of Neurology, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (A.K.A.); (A.Z.S.); (G.A.); (X.Z.); (Y.Z.)
- Department of Microbiology, Jagannath University, Dhaka 1100, Bangladesh
| | - Abdullah Md. Sheikh
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (A.M.S.); (M.A.H.); (S.Y.); (S.T.)
| | - Md. Ahsanul Haque
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (A.M.S.); (M.A.H.); (S.Y.); (S.T.)
- Department of Pharmacy, University of Asia Pacific, Dhaka 1205, Bangladesh
| | - Harumi Osago
- Department of Biochemistry, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan;
| | - Hiromichi Sakai
- Department of Biosignaling and Radioisotope Experiment, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan;
| | - Abu Zaffar Shibly
- Department of Neurology, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (A.K.A.); (A.Z.S.); (G.A.); (X.Z.); (Y.Z.)
- Department of Biotechnology and Genetic Engineering, Mawlana Bhashani Science and Technology University, Tangail 1902, Bangladesh
| | - Shozo Yano
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (A.M.S.); (M.A.H.); (S.Y.); (S.T.)
| | - Makoto Michikawa
- Department of Biochemistry, Graduate School of Medical Sciences, Nagoya City University, Nagoya 467-8601, Japan;
| | - Shahdat Hossain
- Department of Biochemistry and Molecular Biology, Jahangirnagar University, Dhaka 1342, Bangladesh;
| | - Shatera Tabassum
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (A.M.S.); (M.A.H.); (S.Y.); (S.T.)
| | - Garu A.
- Department of Neurology, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (A.K.A.); (A.Z.S.); (G.A.); (X.Z.); (Y.Z.)
| | - Xiaojing Zhou
- Department of Neurology, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (A.K.A.); (A.Z.S.); (G.A.); (X.Z.); (Y.Z.)
| | - Yuchi Zhang
- Department of Neurology, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (A.K.A.); (A.Z.S.); (G.A.); (X.Z.); (Y.Z.)
| | - Atsushi Nagai
- Department of Neurology, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (A.K.A.); (A.Z.S.); (G.A.); (X.Z.); (Y.Z.)
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Walsh KD, Burkhart EM, Nagai A, Aizawa Y, Kato TA. Cytotoxicity and genotoxicity of blue LED light and protective effects of AA2G in mammalian cells and associated DNA repair deficient cell lines. Mutat Res Genet Toxicol Environ Mutagen 2021; 872:503416. [PMID: 34798940 DOI: 10.1016/j.mrgentox.2021.503416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 09/29/2021] [Accepted: 10/03/2021] [Indexed: 10/20/2022]
Abstract
Light emitting diode (LED) devices emit narrow bands of the blue, green, and red light spectrum rather than the continuous spectrum emitted from sunlight and fluorescent light bulbs. LED devices have become considerably common in society, and the fluence of blue light from LED devices is more intense than other light sources. Previous studies presented that the blue light spectrum may harness potentially inimical genotoxicity. Therefore, the aim of this study was to investigate this potential cytotoxicity and genotoxicity, as well as identify the mechanism of the cellular effects induced by blue LED light exposure in mammalian cell lines with their DNA repair deficient mutants. Our results demonstrated that blue LED light induced both oxidative stress to cells and cytotoxic and genotoxic effects including reduction of clonogenicity, cell cycle arrest, induction of sister chromatid exchanges, endoreduplicated chromosomes, and increased frequency of HPRT locus mutations. In DNA repair deficient cells, particularly those involving double strand break repair deficiency, cells presented hypersensitivity to blue LED light exposure. Blue LED light also induced chromosome aberrations more in DNA repair deficient cells than wild type cells. The cytotoxicity of blue LED light was reduced by an effective antioxidant, ascorbic acid 2-glucoside, which can suppress blue LED light induced oxidative stress. These results indicated that prolonged, high intensity exposure to blue LED light induces genotoxic stress to cells, and oxidative stress induced by blue LED light is targeting DNA to induce these biological effects.
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Affiliation(s)
- Kade D Walsh
- Department of Environmental & Radiological Health Sciences, Colorado State University, Fort Collins, CO, 80523, USA
| | - Erica M Burkhart
- Department of Environmental & Radiological Health Sciences, Colorado State University, Fort Collins, CO, 80523, USA
| | - Atsushi Nagai
- Research & Development Department, Carlit Holdings Co., Ltd., Gunma, 377-0004, Japan
| | - Yasushi Aizawa
- Research & Development Department, Carlit Holdings Co., Ltd., Gunma, 377-0004, Japan
| | - Takamitsu A Kato
- Department of Environmental & Radiological Health Sciences, Colorado State University, Fort Collins, CO, 80523, USA.
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Lin Z, Huang S, LingHu X, Wang Y, Wang B, Zhong S, Xie S, Xu X, Yu A, Nagai A, Kobayashi Y, Wa Q, Huang S. Perillaldehyde inhibits bone metastasis and receptor activator of nuclear factor-κB ligand (RANKL) signaling-induced osteoclastogenesis in prostate cancer cell lines. Bioengineered 2021; 13:2710-2719. [PMID: 34738877 PMCID: PMC8973720 DOI: 10.1080/21655979.2021.2001237] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Perillaldehyde (PAH), one of the active ingredients of the traditional Chinese medicine (TCM) plant Perilla frutescens, is widely used and exerts crucial anti-cancer activities. The aim of current study is to illustrate the potential mechanisms of PAH-mediated regulation of bone metastasis and osteoclastogenesis in prostate cancer (PCa) cell lines. Effects of PAH on proliferation, invasion and migration of PC-3 cells were assessed with the Cell Counting Kit-8 (CCK-8) assay and Transwell assays, respectively. Effects of PAH on stem cell characteristics of PC-3 cells were evaluated by cell-matrix adhesion assay, colony formation assay, spheroid formation assay, as well as western blot . The anti-metastasis and anti-osteoclastogenesis activity of PAH in RAW264.7 cells was examined by osteoclast differentiation assay and western blot. The protein levels of CD133 and CD44 in PC-3 cells and the activity of nuclear factor kappa B (NF-κB) signaling pathway in RAW264.7 cells were measured by western blot. PAH suppressed proliferation, invasion and migration of PC-3 cells, prevented stem cell characteristics including cell-matrix adhesion, colony formation, spheroid formation as well as CD133 and CD44 expression. PAH inhibited bone metastasis and osteoclastogenesis via repressing the activation of NF-κB pathway as well as (RANKL) – and cancer cell-induced osteoclastogenesis in PCa cells. These findings suggested the potential therapeutic effects of PAH on the metastasis of patients with PCa.
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Affiliation(s)
- Zhuoyuan Lin
- Department of Urology, The Second Affiliated Hospital of Guangzhou Medical University, 510260, Guangzhou, China
| | - Sheng Huang
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, 330006, Nanchang, China
| | - Xitao LingHu
- Department of Orthopedics, The Second Affiliated Hospital of Zunyi Medical University, 563003, Zunyi, China
| | - Yixiao Wang
- Department of Orthopedics, The Second Affiliated Hospital of Zunyi Medical University, 563003, Zunyi, China
| | - Bin Wang
- Department of Urology, The Second Affiliated Hospital of Guangzhou Medical University, 510260, Guangzhou, China
| | - Shaowen Zhong
- Department of Urology, The Second Affiliated Hospital of Guangzhou Medical University, 510260, Guangzhou, China
| | - Shangyan Xie
- Department of Urology, The Second Affiliated Hospital of Guangzhou Medical University, 510260, Guangzhou, China
| | - Xiaohong Xu
- Department of Urology, The Second Affiliated Hospital of Guangzhou Medical University, 510260, Guangzhou, China
| | - Aorigele Yu
- Graduated school of Medicine, Shimane University, 693-8501, Izumo, Japan
| | - Atsushi Nagai
- Graduated school of Medicine, Shimane University, 693-8501, Izumo, Japan
| | - Yuta Kobayashi
- Graduated school of Medicine, Shimane University, 693-8501, Izumo, Japan
| | - Qingde Wa
- Department of Orthopedics, The Second Affiliated Hospital of Zunyi Medical University, 563003, Zunyi, China
| | - Shuai Huang
- Department of Urology, The Second Affiliated Hospital of Guangzhou Medical University, 510260, Guangzhou, China
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Garu A, Nitta E, Yoshida Y, Yata E, Tsunematsu A, Araki T, Nagai A, Yano S. Does overnight duty affect vascular endothelial function? BMC Cardiovasc Disord 2021; 21:467. [PMID: 34579658 PMCID: PMC8474775 DOI: 10.1186/s12872-021-02277-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 09/21/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The reactive hyperemia index (RHI), which is obtained from the measurement of peripheral arterial tonometry (PAT), is highly associated with the percentage change in the end-diastolic arterial diameter (%flow-mediated dilatation) at reactive hyperemia. Low RHI is reported to be a mortality risk in patients with a high risk of cardiovascular (CV) disease. CV events are thought to be induced by physical and mental stress, including long-term fatigue and lack of sleep. However, the relationship between fatigue, lack of sleep, and endothelial function has not yet been established. METHODS Healthy hospital workers (n = 13, 6 men and 7 women) with an average age of 31.6 years were assigned to this study after they provided written informed consent. During the study period, we conducted 72 measurements of reactive hyperemia-peripheral arterial tonometry (RH-PAT) in the morning before or after their duty. At each measurement of the RH-PAT, we recorded the participants' hours of sleep and evaluated their degree of fatigue using a visual analog scale (VAS). RESULTS Although the VAS was significantly less (36 ± 16% and 64 ± 12%, p < 0.001) and the hours of sleep were longer (6.0 ± 1.1 h and 2.3 ± 1.0 h, p < 0.001) before duty compared to those after duty, the RHI was comparable between them (2.12 ± 0.53 vs. 1.97 ± 0.50, p = 0.21). The VAS score was significantly higher in participants with low RHI (< 1.67) than in those with normal RHI (≥ 2.07) (59 ± 13% and 46 ± 21%, respectively, p < 0.05). However, binary logistic regression showed no significant association between low RHI and the VAS when adjusted for systemic blood pressure (SBP) and heart rate variability (HRV). In a simple regression analysis, the RHI was significantly correlated with the VAS score but not with sleep duration. A multiple linear regression analysis also showed no significant association between the RHI and VAS scores after adjustment for SBP and HRV. CONCLUSIONS Vascular endothelial function was not associated with overnight duty, hours of sleep, or degree of fatigue in healthy young adults. Since the RHI may be decreased in severe fatigue conditions through autonomic nerve activity, one should consider the physical and mental conditions of the examinee when evaluating the RH-PAT results.
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Affiliation(s)
- A Garu
- Department of Neurology, Faculty of Medicine, Shimane University, Shimane, Japan
| | - Eri Nitta
- Department of Clinical Laboratory Medicine, Shimane University Hospital, Shimane, Japan
| | - Yuri Yoshida
- Department of Clinical Laboratory Medicine, Shimane University Hospital, Shimane, Japan
| | - Erika Yata
- Department of Clinical Laboratory Medicine, Shimane University Hospital, Shimane, Japan
| | - Akari Tsunematsu
- Department of Clinical Laboratory Medicine, Shimane University Hospital, Shimane, Japan
| | - Tsuyoshi Araki
- Department of Clinical Laboratory Medicine, Shimane University Hospital, Shimane, Japan
| | - Atsushi Nagai
- Department of Neurology, Faculty of Medicine, Shimane University, Shimane, Japan
| | - Shozo Yano
- Department of Clinical Laboratory Medicine, Shimane University Hospital, Shimane, Japan. .,Department of Laboratory Medicine, Faculty of Medicine, Shimane University, Shimane, Japan.
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Sheikh AM, Wada Y, Tabassum S, Inagaki S, Mitaki S, Yano S, Nagai A. Aggregation of Cystatin C Changes Its Inhibitory Functions on Protease Activities and Amyloid β Fibril Formation. Int J Mol Sci 2021; 22:ijms22189682. [PMID: 34575849 PMCID: PMC8465189 DOI: 10.3390/ijms22189682] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/01/2021] [Accepted: 09/01/2021] [Indexed: 11/16/2022] Open
Abstract
Cystatin C (CST3) is an endogenous cysteine protease inhibitor, which is implicated in cerebral amyloid angiopathy (CAA). In CAA, CST3 is found to be aggregated. The purpose of this study is to investigate whether this aggregation could alter the activity of the protein relevant to the molecular pathology of CAA. A system of CST3 protein aggregation was established, and the aggregated protein was characterized. The results showed that CST3 aggregated both at 80 °C without agitation, and at 37 °C with agitation in a time-dependent manner. However, the levels of aggregation were high and appeared earlier at 80 °C. Dot-blot immunoassay for oligomers revealed that CST3 could make oligomeric aggregates at the 37 °C condition. Electron microscopy showed that CST3 could make short fibrillary aggregates at 37 °C. Cathepsin B activity assay demonstrated that aggregated CST3 inhibited the enzyme activity less efficiently at pH 5.5. At 7.4 pH, it lost the inhibitory properties almost completely. In addition, aggregated CST3 did not inhibit Aβ1-40 fibril formation, rather, it slightly increased it. CST3 immunocytochemistry showed that the protein was positive both in monomeric and aggregated CST3-treated neuronal culture. However, His6 immunocytochemistry revealed that the internalization of exogenous recombinant CST3 by an astrocytoma cell culture was higher when the protein was aggregated compared to its monomeric form. Finally, MTT cell viability assay showed that the aggregated form of CST3 was more toxic than the monomeric form. Thus, our results suggest that aggregation may result in a loss-of-function phenotype of CST3, which is toxic and responsible for cellular degeneration.
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Affiliation(s)
- Abdullah Md. Sheikh
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya Cho, Izumo 693-8501, Japan; (A.M.S.); (S.T.); (S.Y.)
| | - Yasuko Wada
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya Cho, Izumo 693-8501, Japan; (Y.W.); (S.I.); (S.M.)
| | - Shatera Tabassum
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya Cho, Izumo 693-8501, Japan; (A.M.S.); (S.T.); (S.Y.)
| | - Satoshi Inagaki
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya Cho, Izumo 693-8501, Japan; (Y.W.); (S.I.); (S.M.)
| | - Shingo Mitaki
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya Cho, Izumo 693-8501, Japan; (Y.W.); (S.I.); (S.M.)
| | - Shozo Yano
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya Cho, Izumo 693-8501, Japan; (A.M.S.); (S.T.); (S.Y.)
| | - Atsushi Nagai
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya Cho, Izumo 693-8501, Japan; (A.M.S.); (S.T.); (S.Y.)
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya Cho, Izumo 693-8501, Japan; (Y.W.); (S.I.); (S.M.)
- Correspondence: ; Tel./Fax: +81-0853-20-2198
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Ishii K, Asaoka R, Omoto T, Mitaki S, Fujino Y, Murata H, Onoda K, Nagai A, Yamaguchi S, Obana A, Tanito M. Predicting intraocular pressure using systemic variables or fundus photography with deep learning in a health examination cohort. Sci Rep 2021; 11:3687. [PMID: 33574359 PMCID: PMC7878799 DOI: 10.1038/s41598-020-80839-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 12/21/2020] [Indexed: 12/17/2022] Open
Abstract
The purpose of the current study was to predict intraocular pressure (IOP) using color fundus photography with a deep learning (DL) model, or, systemic variables with a multivariate linear regression model (MLM), along with least absolute shrinkage and selection operator regression (LASSO), support vector machine (SVM), and Random Forest: (RF). Training dataset included 3883 examinations from 3883 eyes of 1945 subjects and testing dataset 289 examinations from 289 eyes from 146 subjects. With the training dataset, MLM was constructed to predict IOP using 35 systemic variables and 25 blood measurements. A DL model was developed to predict IOP from color fundus photographs. The prediction accuracy of each model was evaluated through the absolute error and the marginal R-squared (mR2), using the testing dataset. The mean absolute error with MLM was 2.29 mmHg, which was significantly smaller than that with DL (2.70 dB). The mR2 with MLM was 0.15, whereas that with DL was 0.0066. The mean absolute error (between 2.24 and 2.30 mmHg) and mR2 (between 0.11 and 0.15) with LASSO, SVM and RF were similar to or poorer than MLM. A DL model to predict IOP using color fundus photography proved far less accurate than MLM using systemic variables.
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Affiliation(s)
- Kaori Ishii
- Department of Ophthalmology, Seirei Hamamatsu General Hospital, Hamamatsu, Shizuoka, Japan
| | - Ryo Asaoka
- Department of Ophthalmology, Seirei Hamamatsu General Hospital, Hamamatsu, Shizuoka, Japan.
- Seirei Christopher University, Hamamatsu, Shizuoka, Japan.
- Department of Ophthalmology, The University of Tokyo, Tokyo, Japan.
| | - Takashi Omoto
- Department of Ophthalmology, The University of Tokyo, Tokyo, Japan
| | - Shingo Mitaki
- Department of Neurology, Shimane University Faculty of Medicine, Izumo, Japan
| | - Yuri Fujino
- Department of Ophthalmology, Seirei Hamamatsu General Hospital, Hamamatsu, Shizuoka, Japan
- Department of Ophthalmology, Shimane University Faculty of Medicine, Izumo, Japan
| | - Hiroshi Murata
- Department of Ophthalmology, The University of Tokyo, Tokyo, Japan
| | - Keiichi Onoda
- Department of Neurology, Shimane University Faculty of Medicine, Izumo, Japan
- Faculty of Psychology, Outemon Gakuin University, Osaka, Japan
| | - Atsushi Nagai
- Department of Neurology, Shimane University Faculty of Medicine, Izumo, Japan
| | - Shuhei Yamaguchi
- Department of Neurology, Shimane University Faculty of Medicine, Izumo, Japan
| | - Akira Obana
- Department of Ophthalmology, Seirei Hamamatsu General Hospital, Hamamatsu, Shizuoka, Japan
- Hamamatsu BioPhotonics Innovation Chair, Institute for Medical Photonics Research, Preeminent Medical Photonics Education & Research Center, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Masaki Tanito
- Department of Ophthalmology, Shimane University Faculty of Medicine, Izumo, Japan
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van der Jagt R, Vasileiadis A, Veldhuizen H, Shao P, Feng X, Ganapathy S, Habisreutinger NC, van der Veen MA, Wang C, Wagemaker M, van der Zwaag S, Nagai A. Synthesis and Structure-Property Relationships of Polyimide Covalent Organic Frameworks for Carbon Dioxide Capture and (Aqueous) Sodium-Ion Batteries. Chem Mater 2021; 33:818-833. [PMID: 33603278 PMCID: PMC7879495 DOI: 10.1021/acs.chemmater.0c03218] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 01/06/2021] [Indexed: 05/05/2023]
Abstract
Covalent organic frameworks (COFs) are an emerging material family having several potential applications. Their porous framework and redox-active centers enable gas/ion adsorption, allowing them to function as safe, cheap, and tunable electrode materials in next-generation batteries, as well as CO2 adsorption materials for carbon-capture applications. Herein, we develop four polyimide COFs by combining aromatic triamines with aromatic dianhydrides and provide detailed structural and electrochemical characterization. Through density functional theory (DFT) calculations and powder X-ray diffraction, we achieve a detailed structural characterization, where DFT calculations reveal that the imide bonds prefer to form at an angle with one another, breaking the 2D symmetry, which shrinks the pore width and elongates the pore walls. The eclipsed perpendicular stacking is preferable, while sliding of the COF sheets is energetically accessible in a relatively flat energy landscape with a few metastable regions. We investigate the potential use of these COFs in CO2 adsorption and electrochemical applications. The adsorption and electrochemical properties are related to the structural and chemical characteristics of each COF, giving new insights for advanced material designs. For CO2 adsorption specifically, the two best performing COFs originated from the same triamine building block, which-in combination with force-field calculations-revealed unexpected structure-property relationships. Specific geometries provide a useful framework for Na-ion intercalation with retainable capacities and stable cycle life at a relatively high working potential (>1.5 V vs Na/Na+). Although this capacity is low compared to conventional inorganic Li-ion materials, we show as a proof of principle that these COFs are especially promising for sustainable, safe, and stable Na-aqueous batteries due to the combination of their working potentials and their insoluble nature in water.
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Affiliation(s)
- Remco van der Jagt
- Storage
of Electrochemical Energy, Technische Universiteit
Delft, Mekelweg 15, 2629 JB Delft, The Netherlands
| | - Alexandros Vasileiadis
- Storage
of Electrochemical Energy, Technische Universiteit
Delft, Mekelweg 15, 2629 JB Delft, The Netherlands
| | - Hugo Veldhuizen
- Novel
Aerospace Materials, Technische Universiteit
Delft, Kluyverweg 1, 2629 GB Delft, The Netherlands
| | - Pengpeng Shao
- School
of Chemistry and Chemical Engineering, Beijing
Institute of Technology, 100081 Beijing, China
| | - Xiao Feng
- School
of Chemistry and Chemical Engineering, Beijing
Institute of Technology, 100081 Beijing, China
| | - Swapna Ganapathy
- Storage
of Electrochemical Energy, Technische Universiteit
Delft, Mekelweg 15, 2629 JB Delft, The Netherlands
| | - Nicolas C. Habisreutinger
- Novel
Aerospace Materials, Technische Universiteit
Delft, Kluyverweg 1, 2629 GB Delft, The Netherlands
| | - Monique A. van der Veen
- Catalysis
Engineering, Technische Universiteit Delft, Van der Maasweg 9 1, 2629 HZ Delft, The Netherlands
| | - Chao Wang
- Storage
of Electrochemical Energy, Technische Universiteit
Delft, Mekelweg 15, 2629 JB Delft, The Netherlands
| | - Marnix Wagemaker
- Storage
of Electrochemical Energy, Technische Universiteit
Delft, Mekelweg 15, 2629 JB Delft, The Netherlands
| | - Sybrand van der Zwaag
- Novel
Aerospace Materials, Technische Universiteit
Delft, Kluyverweg 1, 2629 GB Delft, The Netherlands
| | - Atsushi Nagai
- Novel
Aerospace Materials, Technische Universiteit
Delft, Kluyverweg 1, 2629 GB Delft, The Netherlands
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Shimizu H, Asaoka R, Omoto T, Fujino Y, Mitaki S, Onoda K, Nagai A, Yamaguchi S, Tanito M. Prevalence of Epiretinal Membrane among Subjects in a Health Examination Program in Japan. Life (Basel) 2021; 11:life11020093. [PMID: 33513873 PMCID: PMC7912057 DOI: 10.3390/life11020093] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 01/14/2021] [Accepted: 01/25/2021] [Indexed: 12/02/2022] Open
Abstract
The prevalence of an epiretinal membrane (ERM) was elucidated using a dataset from a health examination program database in Japan. From the cohort database, 5042 eyes of 2552 subjects were included. The presence of an ERM, cellophane macular reflex (CMR), or preretinal macular fibrosis (PMF) was detected using color fundus photographs, and crude and age-standardized prevalence were obtained. To further assess the possible risk factors of ERM, background parameters were compared between ERM+ and − groups, and multiple logistic regression analysis was performed. ERM was detected in fundus photographs of 275 eyes (eye-based prevalence of 5.5%) from 217 subjects (subject-based prevalence of 8.5%). CMR was detected in 169 eyes (3.4%) of 138 subjects (5.4%), and PMF was detected in 106 eyes (2.1%) of 97 subjects (3.8%). By univariate analyses, compared with ERM− eyes or subjects, higher Scheie’s H grade (p < 0.0001), S grade (p < 0.0001), and glaucoma prevalence (p = 0.0440) were found in ERM+ eyes, and older age (p < 0.0001), more frequent histories of hypertension (p = 0.0033) and hyperlipidemia (p = 0.0441), and more frequent uses of medication for hypertension (p = 0.0034) and hyperlipidemia (p = 0.0074), shorter body height (p = 0.0122), and higher systolic blood pressure (p = 0.0078), and thicker intimal medial thickness (p = 0.0318) were found in ERM+ subjects. By multivariate analyses, older age (p < 0.0001, estimate = 0.05/year) was the only significant factor of ERM prevalence. Age-standardized prevalence of ERM was calculated to be 2.4%, 6.7%, and 13.3% for all ages, subjects older than 40 years, and subjects older than 65 years, respectively. We reported the prevalence of ERM and its subclasses in Japanese subjects. Since its prevalence is remarkably high in older subjects, an ERM can be seen as an important cause of visual impairment in Japan and in areas of the world where individuals live to an advanced age.
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Affiliation(s)
- Hiroshi Shimizu
- Department of Ophthalmology, Shimane University Faculty of Medicine, Izumo 693-8501, Japan;
| | - Ryo Asaoka
- Department of Ophthalmology, Seirei Hamamatsu General Hospital, Hamamatsu 430-8558, Japan; (R.A.); (Y.F.)
| | - Takashi Omoto
- Department of Ophthalmology, The University of Tokyo, Tokyo 113-0033, Japan;
| | - Yuri Fujino
- Department of Ophthalmology, Seirei Hamamatsu General Hospital, Hamamatsu 430-8558, Japan; (R.A.); (Y.F.)
| | - Shingo Mitaki
- Department of Neurology, Shimane University Faculty of Medicine, Izumo 693-8501, Japan; (S.M.); (A.N.); (S.Y.)
| | - Keiichi Onoda
- Faculty of Psychology, Otemon Gakuin University, Ibaraki 567-8502, Japan;
| | - Atsushi Nagai
- Department of Neurology, Shimane University Faculty of Medicine, Izumo 693-8501, Japan; (S.M.); (A.N.); (S.Y.)
| | - Shuhei Yamaguchi
- Department of Neurology, Shimane University Faculty of Medicine, Izumo 693-8501, Japan; (S.M.); (A.N.); (S.Y.)
| | - Masaki Tanito
- Department of Ophthalmology, Shimane University Faculty of Medicine, Izumo 693-8501, Japan;
- Correspondence: ; Tel.: +81-853-20-2284
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Kaneto H, Kamei S, Tatsumi F, Shimoda M, Kimura T, Nakanishi S, Miyaji Y, Nagai A, Kaku K, Mune T. Case Report: Malignant Pheochromocytoma Without Hypertension Accompanied by Increment of Serum VEGF Level and Catecholamine Cardiomyopathy. Front Endocrinol (Lausanne) 2021; 12:688536. [PMID: 34248848 PMCID: PMC8267922 DOI: 10.3389/fendo.2021.688536] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 06/08/2021] [Indexed: 12/21/2022] Open
Abstract
INTRODUCTION Pheochromocytoma is a catecholamine-producing tumor in the adrenal medulla and is often accompanied by hypertension, hyperglycemia, hypermetabolism, headache, and hyperhidrosis, and it is classified as benign and malignant pheochromocytoma. In addition, persistent hypertension is often observed in subjects with malignant pheochromocytoma. CASE PRESENTATION A 52-year-old Japanese male was referred and hospitalized in our institution. He had a health check every year and no abnormalities had been pointed out. In addition, he had no past history of hypertension. In endocrinology markers, noradrenaline level was as high as 7,693 pg/ml, whereas adrenaline level was within normal range. Abdominal contrast-enhanced computed tomography revealed a 50-mm hyper-vascularized tumor with calcification in the right adrenal gland and multiple hyper-vascularized tumors in the liver. In 131I MIBG scintigraphy, there was high accumulation in the right adrenal gland and multiple accumulation in the liver and bone. In echocardiography, left ventricular ejection fraction was as low as 14.3%. In coronary angiography, however, there was no significant stenosis in the coronary arteries. Based on these findings, we finally diagnosed him as malignant pheochromocytoma accompanied by multiple liver and bone metastases and catecholamine cardiomyopathy. However, blood pressure was continuously within normal range without any anti-hypertensive drugs. Right adrenal tumor resection was performed together with left hepatic lobectomy and cholecystectomy. Furthermore, serum levels of vascular endothelial growth factor (VEGF) and parathyroid (PTH)-related protein were very high before the operation but they were markedly reduced after the operation. CONCLUSIONS This is the first report showing the time course of serum VEGF level in a subject with malignant pheochromocytoma, clearly showing that malignant pheochromocytoma actually secreted VEGF. In addition, this case report clearly shows that we should bear in mind once again that malignant pheochromocytoma is not necessarily accompanied by hypertension.
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Affiliation(s)
- Hideaki Kaneto
- Department of Diabetes, Endocrinology and Metabolism, Kawasaki Medical School, Kurashiki, Japan
- *Correspondence: Hideaki Kaneto,
| | - Shinji Kamei
- Department of Diabetic Medicine, Kurashiki Central Hospital, Kurashiki, Japan
| | - Fuminori Tatsumi
- Department of Diabetes, Endocrinology and Metabolism, Kawasaki Medical School, Kurashiki, Japan
| | - Masashi Shimoda
- Department of Diabetes, Endocrinology and Metabolism, Kawasaki Medical School, Kurashiki, Japan
| | - Tomohiko Kimura
- Department of Diabetes, Endocrinology and Metabolism, Kawasaki Medical School, Kurashiki, Japan
| | - Shuhei Nakanishi
- Department of Diabetes, Endocrinology and Metabolism, Kawasaki Medical School, Kurashiki, Japan
| | - Yoshiyuki Miyaji
- Department of Urology, Kawasaki Medical School, Kurashiki, Japan
| | - Atsushi Nagai
- Department of Urology, Kawasaki Medical School, Kurashiki, Japan
| | - Kohei Kaku
- Department of Diabetes, Endocrinology and Metabolism, Kawasaki Medical School, Kurashiki, Japan
| | - Tomoatsu Mune
- Department of Diabetes, Endocrinology and Metabolism, Kawasaki Medical School, Kurashiki, Japan
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Hara K, Sano I, Nagai A, Tanito M. Comparisons of optic nerve head morphology parameters between the presence and absence of silent brain infarctions. Graefes Arch Clin Exp Ophthalmol 2020; 259:1659-1660. [PMID: 33185729 DOI: 10.1007/s00417-020-05012-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 11/02/2020] [Accepted: 11/06/2020] [Indexed: 11/30/2022] Open
Affiliation(s)
- Katsunori Hara
- Department of Ophthalmology, Shimane University Faculty of Medicine, 89-1 Enya-cho, Izumo, Shimane, 693-8501, Japan
| | - Ichiya Sano
- Department of Ophthalmology, Shimane University Faculty of Medicine, 89-1 Enya-cho, Izumo, Shimane, 693-8501, Japan
| | - Atsushi Nagai
- Department of Neurology, Shimane University Faculty of Medicine, Izumo, Japan
| | - Masaki Tanito
- Department of Ophthalmology, Shimane University Faculty of Medicine, 89-1 Enya-cho, Izumo, Shimane, 693-8501, Japan.
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Takeda A, Murayama K, Okazaki Y, Imai-Okazaki A, Ohtake A, Takakuwa E, Yamazawa H, Izumi G, Abe J, Nagai A, Taniguchi K, Sasaki D, Tsujioka T, Basgen J. Advanced pathologic study for definite diagnosis of mitochondrial cardiomyopathy. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Mitochondrial cardiomyopathy (MCM) is usually recognized as one of the phenotypes of systemic mitochondrial disease. However if there are no cardiac symptoms, it is difficult to make a definite diagnosis because of various cardiovascular phenotypes and no diagnostic criteria in pathological examination. To add myocardial pathology to the diagnostic criteria for mitochondrial respiratory chain disorders, which is the gold standard in the diagnosis of mitochondrial diseases, we performed quantitative analysis of mitochondria using electron microscopy and immunohistopathologic analysis with respiratory chain enzyme antibodies. Ten patients with hypertrophic or restrictive cardiomyopathy who had undergone endomyocardial biopsy were studied. Respiratory chain enzymatic assay and genetic study were performed and four patients were diagnosed with MCM. Using electron microscopy with quantitative analysis, volume density of mitochondria within cardiac muscle cells was significantly increased in the MCM group compared to the non-MCM group (p=0.013). Immunohistopathologic results were compatible with the result of the respiratory chain enzymatic assay. These advanced pathological tests can distinguish MCM from other cardiomyopathies.
Results of immunopathologic study
Funding Acknowledgement
Type of funding source: Public grant(s) – National budget only. Main funding source(s): The Practical Research Project for Rare/Intractable Diseases from the Japan Agency for Medical Research and Development, AMED.
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Affiliation(s)
- A Takeda
- Hokkaido University, Department of Paediatrics, Sapporo, Japan
| | - K Murayama
- Chiba Children's Hospital, Department of Metabolism, Chiba, Japan
| | - Y Okazaki
- Juntendo University Graduate School of Medicine, Intractable Disease Research Center, Tokyo, Japan
| | - A Imai-Okazaki
- Juntendo University Graduate School of Medicine, Intractable Disease Research Center, Tokyo, Japan
| | - A Ohtake
- Saitama Medical University, Department of Paediatrics, Saitama, Japan
| | - E Takakuwa
- Hokkaido University, Department of Surgical Pathology, Sapporo, Japan
| | - H Yamazawa
- Hokkaido University, Department of Paediatrics, Sapporo, Japan
| | - G Izumi
- Hokkaido University, Department of Paediatrics, Sapporo, Japan
| | - J Abe
- Hokkaido University, Department of Paediatrics, Sapporo, Japan
| | - A Nagai
- Hokkaido University, Department of Paediatrics, Sapporo, Japan
| | - K Taniguchi
- Hokkaido University, Department of Paediatrics, Sapporo, Japan
| | - D Sasaki
- Hokkaido University, Department of Paediatrics, Sapporo, Japan
| | - T Tsujioka
- Hokkaido University, Department of Paediatrics, Sapporo, Japan
| | - J Basgen
- Charles R. Drew University of Science and Medicine, Department of Research, Los Angeles, United States of America
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Tabassum S, Sheikh AM, Yano S, Ikeue T, Mitaki S, Michikawa M, Nagai A. A Cationic Gallium Phthalocyanine Inhibits Amyloid β Peptide Fibril Formation. Curr Alzheimer Res 2020; 17:589-600. [PMID: 33032510 DOI: 10.2174/1567205017666201008112002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 08/05/2020] [Accepted: 08/12/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Amyloid β (Aβ) peptide deposition is considered as the main cause of Alzheimer's disease (AD). Previously, we have shown that a Zn containing neutral phthalocyanine (Zn-Pc) inhibits Aβ fibril formation. OBJECTIVE The objective of this study is to investigate the effects of a cationic gallium containing Pc (GaCl-Pc) on Aβ fibril formation process. METHODS AND RESULT Aβ fibril formation was induced by incubating synthetic Aβ peptides in a fibril forming buffer, and the amount of fibril was evaluated by ThT fluorescence assay. GaCl-Pc dosedependently inhibited both Aβ1-40 and Aβ1-42 fibril formation. It mainly inhibited the elongation phase of Aβ1-42 fibril formation kinetics, but not the lag phase. Western blotting results showed that it did not inhibit its oligomerization process, rather increased it. Additionally, GaCl-Pc destabilized preformed Aβ1- 42 fibrils dose-dependently in vitro condition, and decreased Aβ levels in the brain slice culture of APP transgenic AD model mice (J20 strain). Near-infrared scanning results showed that GaCl-Pc had the ability to bind to Aβ1-42. MTT assay demonstrated that GaCl-Pc did not have toxicity towards a neuronal cell line (A1) in culture rather, showed protective effects on Aβ-induced toxicity. Moreover, it dosedependently decreased Aβ-induced reactive oxygen species levels in A1 culture. CONCLUSION Thus, our result demonstrated that GaCl-Pc decreased Aβ aggregation and destabilized the preformed fibrils. Since cationic molecules show a better ability to cross the blood-brain barrier, cationic GaCl-Pc could be important for the therapy of AD.
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Affiliation(s)
- Shatera Tabassum
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya Cho, Izumo 693-8501, Japan
| | - Abdullah Md Sheikh
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya Cho, Izumo 693-8501, Japan
| | - Shozo Yano
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, 89-1 Enya Cho, Izumo 693-8501, Japan
| | - Takahisa Ikeue
- Department of Chemistry, Graduate School of Science and Engineering, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan
| | - Shingo Mitaki
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya Cho, Izumo 693-8501, Japan
| | - Makoto Michikawa
- Department of Biochemistry, Graduate School of Medical Sciences, Nagoya City University, Kawasumi 1 Mizuho, Nagoya 467-8601, Japan
| | - Atsushi Nagai
- Department of Neurology, Faculty of Medicine, Shimane University, 89-1 Enya Cho, Izumo 693-8501, Japan
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Ohira S, Tone S, Tsuji S, Morinaka H, Nishishita N, Takasaki H, Hirata K, Sugiyama S, Fujita M, Tsukimori S, Shimizu S, Kaifu M, Hara R, Fujii T, Miyaji Y, Nagai A. Anti-inflammatory effect of IDO1 inhibition for acute inflammation in the prostate. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)32698-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Morinaka H, Ohira S, Tone S, Tsuji S, Nishishita N, Takasaki H, Hirata K, Sugiyama S, Fujita M, Tsukimori S, Shimizu S, Kaifu M, Hara R, Fujii T, Miyaji Y, Nagai A. Pathological analysis focused on inflammatory changes in bladder dysfunction following partial bladder outlet obstruction. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)33245-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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50
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Nakagawa T, Ishida M, Naito J, Nagai A, Yamaguchi S, Onoda K. Prediction of conversion to Alzheimer's disease using deep survival analysis of MRI images. Brain Commun 2020; 2:fcaa057. [PMID: 32954307 PMCID: PMC7425528 DOI: 10.1093/braincomms/fcaa057] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 03/18/2020] [Accepted: 04/15/2020] [Indexed: 12/24/2022] Open
Abstract
The prediction of the conversion of healthy individuals and those with mild cognitive impairment to the status of active Alzheimer’s disease is a challenging task. Recently, a survival analysis based upon deep learning was developed to enable predictions regarding the timing of an event in a dataset containing censored data. Here, we investigated whether a deep survival analysis could similarly predict the conversion to Alzheimer’s disease. We selected individuals with mild cognitive impairment and cognitively normal subjects and used the grey matter volumes of brain regions in these subjects as predictive features. We then compared the prediction performances of the traditional standard Cox proportional-hazard model, the DeepHit model and our deep survival model based on a Weibull distribution. Our model achieved a maximum concordance index of 0.835, which was higher than that yielded by the Cox model and comparable to that of the DeepHit model. To our best knowledge, this is the first report to describe the application of a deep survival model to brain magnetic resonance imaging data. Our results demonstrate that this type of analysis could successfully predict the time of an individual’s conversion to Alzheimer’s disease.
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Affiliation(s)
- Tomonori Nakagawa
- Department of Neurology, Masuda Red Cross Hospital, Masuda 698-8501, Japan
| | - Manabu Ishida
- Department of Neurology, Shimane University, Izumo 693-8501, Japan.,ERISA Corporation, Matsue 690-0816, Japan
| | | | - Atsushi Nagai
- Department of Neurology, Shimane University, Izumo 693-8501, Japan
| | - Shuhei Yamaguchi
- Department of Neurology, Shimane University, Izumo 693-8501, Japan
| | - Keiichi Onoda
- Department of Neurology, Shimane University, Izumo 693-8501, Japan.,Department of Psychology, Otemon Gakuin University, Osaka 567-8502, Japan
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