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Synthesis of Electrophilic Cyclopent-2-enone Conjugates With Modulatory Effects on Inflammatory Responses Mediated by Nrf2/Keap1, NF-κB and IL-6

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ChemistrySelect 2024年第30期9卷

作者： Gabriel Luis L. Neri Yi-Siao Chen Hans Christian P. Arturo Mark Tristan J. Quimque Warren S. Vidar Young-Sam Keum Chen-Chung Liao Chia-Hung Yen Allan Patrick G. Macabeo Laboratory for Organic Reactivity Discovery and Synthesis (LORDS) Research Center for the Natural and Applied Sciences University of Santo Tomas 1015 España Manila Philippines The Graduate School University of Santo Tomas 1015 España Manila Philippines Ph.D. Program in Environmental and Occupational Medicine College of Medicine Kaohsiung Medical University and National Health Research Institutes Kaohsiung 80708 Taiwan Department of Chemistry College of Science and Mathematics Mindanao State University-Iligan Institute of Technology 9200 Tibanga Iligan City Philippines College of Pharmacy and Integrated Research Institute for Drug Development Dongguk University 32 Dongguk-ro 10326 Goyang Gyeonggi-do Korea Cancer Progression Research Center National Yang Ming Chiao Tung University Taipei 112 Taiwan Graduate Institute of Natural Products College of Pharmacy Kaohsiung Medical University Kaohsiung 80708 Taiwan Drug Development and Value Creation Research Center Kaohsiung Medical University Kaohsiung Taiwan

Cyclopent-2-enone bearing natural products possess anti-inflammatory, cytotoxic, antiproliferative, and antimicrobial activities attributed to the presence of a Michael acceptor enone group acting as a bait for protein targets. To explore the biological activity of synthetic small molecules bearing the cyclopent-2-enone moiety, a collection of 4-substituted cyclopent-2-enones ( 3 a – 3 i ) was prepared synthetically using Lewis acid-catalyzed Mukaiyama-Michael reaction (MMR) in modest to high yields. These derivatives were screened for their effect on inflammatory response mediators, namely Nrf2, NF-κB, and IL-6 through cell-based reporter assays. The results show that 5-(4-oxocyclopent-2-en-1-yl)furan-2(5 H )-one ( 3 g ) is a potent Nrf2 activator in HaCaT cells. The mechanism of Nrf2 activation by 3 g was investigated through an MS/MS-directed proteomic analysis and have shown the formation of a Michael adduct via cysteine-613 on Keap1, an inhibitor of Nrf2. density functional theory calculations show favorable Michael adduct formation between 3 g and the truncated Keap1 tripeptide Pro-Cys613-Ala at the β-carbon of the cyclopent-2-enone moiety. On the other hand, the derivative 4-(2-oxo-2-phenylethyl)cyclopent-2-en-1-one ( 3 a ) exhibited selective Nrf2 inhibition in the cancer cell line Huh7, and inhibitory activity along with 3 g against NF-κB, and IL-6 in RAW 264.7 cells. This points to the cyclopent-2-enone group being an effective scaffold for anti-inflammatory drug designs.

关键词： Cyclopentenones Nrf2 Keap1 Michael acceptor drug discovery

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A self-powered multifunctional dressing for active infection prevention and accelerated wound healing

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Science Advances 2023年第4期9卷 eadc8758页

作者： Barman, Snigdha Roy Chan, Shuen-Wen Kao, Fu-Cheng Ho, Hsuan-Yu Khan, Imran Pal, Arnab Huang, Chih-Ching Lin, Zong-Hong Institute of Biomedical Engineering National Tsing Hua University Hsinchu30013 Taiwan International Intercollegiate Ph.D. Program National Tsing Hua University Hsinchu30013 Taiwan Department of Biomedical Engineering and Environmental Sciences National Tsing Hua University Hsinchu30013 Taiwan Department of Orthopaedic Surgery Spine Section Chang Gung Memorial Hospital Taoyuan33305 Taiwan College of Medicine Chang Gung University Taoyuan33302 Taiwan Department of Power Mechanical Engineering National Tsing Hua University Hsinchu30013 Taiwan Institute of NanoEngineering and Microsystems National Tsing Hua University Hsinchu30013 Taiwan Department of Bioscience and Biotechnology National Taiwan Ocean University Keelung202301 Taiwan Center of Excellence for the Oceans National Taiwan Ocean University Keelung202301 Taiwan School of Pharmacy College of Pharmacy Kaohsiung Medical University Kaohsiung80708 Taiwan Department of Chemistry National Tsing Hua University Hsinchu30013 Taiwan Frontier Research Center on Fundamental and Applied Sciences of Matters National Tsing Hua University Hsinchu30013 Taiwan Department of Biomedical Engineering National Taiwan University Taipei10617 Taiwan

Interruption of the wound healing process due to pathogenic infection remains a major health care challenge. The existing methods for wound management require power sources that hinder their utilization outside of clinical settings. Here, a next generation of wearable self-powered wound dressing is developed, which can be activated by diverse stimuli from the patient’s body and provide on-demand treatment for both normal and infected wounds. The highly tunable dressing is composed of thermocatalytic bismuth telluride nanoplates (Bi2Te3 NPs) functionalized onto carbon fiber fabric electrodes and triggered by the surrounding temperature difference to controllably generate hydrogen peroxide to effectively inhibit bacterial growth at the wound site. The integrated electrodes are connected to a wearable triboelectric nanogenerator (TENG) to provide electrical stimulation for accelerated wound closure by enhancing cellular proliferation, migration, and angiogenesis. The reported self-powered dressing holds great potential in facilitating personalized and user-friendly wound care with improved healing outcomes. Copyright © 2023 The Authors, some rights reserved.

关键词： Patient treatment

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Transformative lactera-polypyrrole@carrageenan microparticles leveraging NIR for skin regeneration and stress relief

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International journal of biological macromolecules 2025年 316卷 144436页

作者： Sih-Chi Chuang Shih-An Yu Pei-Chia Hung Andrew E-Y Chuang Jia-Wei Liang Lekshmi Rethi Chih-Kuang Chen Hsu-Wei Fang Hieu Trung Nguyen Hsien-Tsung Lu Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei 10608 Taiwan Doctoral Program of Biochemical and Biomedical Engineering National Taipei University of Technology Taipei 10608 Taiwan. Hsuan Chen Technology CO. LTD. New Taipei City 22055 Taiwan. Graduate Institute of Biomedical Materials and Tissue Engineering College of Biomedical Engineering Taipei Medical University New Taipei City Taiwan International Ph.D. Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University New Taipei City Taiwan Cell Physiology and Molecular Image Research Center Taipei Medical University-Wan Fang Hospital Taipei 11696 Taiwan. Hsuan Chen Technology CO. LTD. New Taipei City 22055 Taiwan Graduate Institute of Biomedical Materials and Tissue Engineering College of Biomedical Engineering Taipei Medical University New Taipei City Taiwan. International Ph.D. Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University New Taipei City Taiwan. Department of Physical Medicine and Rehabilitation Chang Gung Memorial Hospital Taoyuan Taiwan. School of Medicine Chang Gung University Taoyuan Taiwan. Graduate Institute of Clinical Medicine College of Medicine Taipei Medical University Taipei Taiwan. Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei 10608 Taiwan. Department of Orthopedics and Trauma Faculty of Medicine University of Medicine and Pharmacy at Ho Chi Minh City Ho Chi Minh City 700000 Viet Nam. Department of Orthopedic Taipei Medical University Hospital Taipei City 11031 Taiwan Department of Orthopedics School of Medicine College of Medicine Taipei Medical University Taipei 11031 Taiwan International Ph.D. Program in Cell Therapy and Regenerative Medicine College of Medicine Taipei Medical University Taipei 11031 Taiwan. Electronic address: lu7788@tmu.edu.tw.

Effective wound healing remains a significant challenge in regenerative medicine, particularly in minimizing inflammation and promoting scarless recovery. This study introduces a bioengineered LAC-PPy@Car MF composite, designed to leverage near-infrared (NIR)-induced photothermal therapy alongside biotherapeutics to accelerate tissue regeneration. The composite integrates the photothermal properties of polypyrrole (PPy) with the anti-inflammatory and regenerative potential of Lactera (LAC) and Carrageenan (Car). Upon NIR activation, the composite generates localized mild-hyperthermia, reducing oxidative stress, enhancing Aryl Hydrocarbon Receptor (AhR) activity, and upregulating heat shock proteins (HSP). These effects synergistically create a bioactive environment conducive to cellular proliferation and tissue repair. Biochemical evaluations demonstrate that LAC-PPy@Car MF effectively reduces oxidative stress, stimulates fibroblast migration, and promotes the proliferation of skin cells. Immunofluorescence staining reveals significant activation of AhR and HSP in treated tissues, correlating with accelerated cellular proliferation and improved skin architecture. The NIR-triggered photothermal effect enhances the therapeutic potential of the composite, ensuring precise and minimally invasive treatment for burn injuries. These findings position phototherapeutic LAC-PPy@Car MF as a promising candidate for advanced wound healing applications. Its dual functionality, combining photothermal therapy with bioactive healing properties, offers a transformative approach to regenerative medicine, paving the way for improved clinical outcomes in wound care.

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Mitochondrial activation via calcium peroxide/carrageenan/soybean lecithin-derived polypyrrole phototherapeutic microparticles

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Colloids and Surfaces B: Biointerfaces 2025年 254卷 114787页

作者： Chuang, Sih-Chi Yu, Shih-An Hung, Pei-Chia Chuang, Andrew E.-Y. Liang, Jia-Wei Sun, Chia-Lu Rethi, Lekshmi Fang, Hsu-Wei Nguyen, Hieu Trung Tsai, Yao-Tung Weng, Pei-Wei Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei10608 Taiwan Doctoral Program of Biochemical and Biomedical Engineering National Taipei University of Technology Taipei10608 Taiwan Taipei Medical University Derived Company-Hsuan Chen Technology CO. LTD. New Taipei City22055 Taiwan Graduate Institute of Biomedical Materials and Tissue Engineering College of Biomedical Engineering Taipei Medical University New Taipei City Taiwan International Ph.D. Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University New Taipei City Taiwan Cell Physiology and Molecular Image Research Center Taipei Medical University-Wan Fang Hospital Taipei11696 Taiwan WELLCARE Health Care Supply Co. Ltd. Taipei Taiwan Department of Orthopedics and Trauma Faculty of Medicine University of Medicine and Pharmacy at Ho Chi Minh city Ho Chi Minh City700000 Viet Nam Department of Orthopaedic Surgery Tri-Service General Hospital National Defense Medical Center No. 325 Sec. 2 Chenggong Rd. Neihu Dist. Taipei City11490 Taiwan Division of Traumatology Department of Surgery Tri-Service General Hospital National Defense Medical Center No. 325 Sec. 2 Chenggong Rd. Neihu Dist. Taipei City11490 Taiwan Department of Orthopedics School of Medicine College of Medicine Taipei Medical University Taipei11031 Taiwan Department of Orthopedics Shuang Ho Hospital Taipei Medical University New Taipei City Taiwan

Mitochondria, often referred to as the "powerhouses" of eukaryotic cells, play a critical role in maintaining cellular homeostasis and supporting essential life functions, particularly in cell survival and apoptosis. This study introduces a composite formulation—combining carrageenan (Car), calcium peroxide (CaO2), and microparticles, derived from soybean oil lecithin, enhanced with photothermally active polypyrrole (PPy)—to create Car-Lec-PPy MP, aimed at promoting mitochondrial activation in cells. The investigation focuses on intercellular mitochondrial transfer and activation as a therapeutic strategy. The formulation seeks to stimulate mitochondrial biogenesis and enhance cellular resilience through targeted mitochondrial activation, leveraging the synergistic effects of near-infrared (NIR) therapy. In the in vivo experiment, phototherapeutic Car-Lec-PPy MP was administered to rodent muscle tissue. The results showed increased expression of heat-shock proteins and reduced oxidative stress in the treated muscle. Preliminary findings suggest that this approach not only boosts mitochondrial activity but also improves cell proliferation and survival, presenting significant potential for applications in regenerative medicine and cellular therapy. © 2025 Elsevier B.V.

关键词： Mitochondria

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Applications of engineered biochar in remediation of heavy metal(loid)s pollution from wastewater: Current perspectives toward sustainable development goals

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Science of the Total Environment 2024年 926卷 171859页

作者： Tran, Thien-Khanh Huynh, Loan Nguyen, Hoang-Lam Nguyen, Minh-Ky Lin, Chitsan Hoang, Tuan-dung Hung, Nguyen Tri Q. Nguyen, X. Hoan Chang, S. Woong Nguyen, d. duc Advanced Applied Sciences Research Group Dong Nai Technology University Bien Hoa City76100 Viet Nam Faculty of Technology Dong Nai Technology University Bien Hoa City76100 Viet Nam Department of Civil Engineering McGill University Montreal Canada Faculty of Environment and Natural Resources Nong Lam University Hamlet 6 Linh Trung Ward Thu Duc City Ho Chi Minh City700000 Viet Nam Ph.D. Program in Maritime Science and Technology National Kaohsiung University of Science and Technology Kaohsiung81157 Taiwan Department of Marine Environmental Engineering National Kaohsiung University of Science and Technology Kaohsiung81157 Taiwan School of Chemistry and Life Science Hanoi University of Science and Technology No. 1 Dai Co Viet Hai Ba Trung Hanoi100000 Viet Nam Vietnam National University Hanoi - School of Interdisciplinary Sciences and Arts 144 Xuan Thuy Street Cau Giay District Hanoi100000 Viet Nam Ho Chi Minh City University of Industry and Trade Ho Chi Minh City Viet Nam Department of Civil & Energy System Engineering Kyonggi University Suwon16227 Korea Republic of Institute of Applied Technology and Sustainable Development Nguyen Tat Thanh University Ho Chi Minh City700000 Viet Nam

Environmental pollution of heavy metal(loid)s (HMs) caused adverse impacts, has become one of the emerging concerns and challenges worldwide. Metal(loid)s can pose significant threats to living organisms even when present in trace levels within environmental matrices. Extended exposure to these substances can lead to adverse health consequences in humans. Removing HM-contaminated water and moving toward sustainable development goals (SdGs) is critical. In this mission, biochar has recently gained attention in the environmental sector as a green and alternative material for wastewater removal. This work provides a comprehensive analysis of the remediation of typical HMs by biochars, associated with an understanding of remediation mechanisms, and gives practical solutions for ecologically sustainable. Applying engineered biochar in various fields, especially with nanoscale biochar-aided wastewater treatment approaches, can eliminate hazardous metal(loid) contaminants, highlighting an environmentally friendly and low-cost method. Surface modification of engineered biochar with nanomaterials is a potential strategy that positively influences its sorption capacity to remove contaminants. The research findings highlighted the biochars' ability to adsorb HM ions based on increased specific surface area (SSA), heightened porosity, and forming inner-sphere complexes with oxygen-rich groups. Utilizing biochar modification emerged as a viable approach for addressing lead (Pb), cadmium (Cd), arsenic (As), mercury (Hg), and chromium (Cr) pollution in aqueous environments. Most biochars investigated demonstrated a removal efficiency >90 % (Cd, As, Hg) and can reach an impressive 99 % (Pb and Cr). Furthermore, biochar and advanced engineered applications are also considered alternative solutions based on the circular economy. © 2024 Elsevier B.V.

关键词： Nanostructured materials

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Correction to: A mini‑review on plasticrusts: occurrence, current trends, potential threats, and recommendations for coastal sustainability

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Environmental monitoring and assessment 2024年第7期196卷 629页

作者： Minh-Ky Nguyen Md Refat Jahan Rakib Hoang-Lam Nguyen Chitsan Lin Guilherme Malafaia Abubakr M Idris Faculty of Environment and Natural Resources Nong Lam University of Ho Chi Minh City Hamlet 6 Linh Trung Ward Thu Duc City Ho Chi Minh City 700000 Vietnam. Ph.D. Program in Maritime Science and Technology National Kaohsiung University of Science and Technology Kaohsiung 81157 Taiwan. Department of Fisheries and Marine Science Faculty of Science Noakhali Science and Technology University Sonapur Noakhali 3814 Bangladesh. Department of Civil Engineering McGill University Montreal Canada. Ph.D. Program in Maritime Science and Technology National Kaohsiung University of Science and Technology Kaohsiung 81157 Taiwan. ctlin@nkust.edu.tw. Department of Marine Environmental Engineering National Kaohsiung University of Science and Technology Kaohsiung 81157 Taiwan. ctlin@nkust.edu.tw. Post‑Graduation Program in Ecology Conservation and Biodiversity Federal University of Uberlandia Uberlandia MG Brazil. guilhermeifgoiano@***. Post‑Graduation Program in Biotechnology and Biodiversity Federal University of Goias Goiania GO Brazil. guilhermeifgoiano@***. Post‑Graduation Program in Conservation of Cerrado Natural Resources Goiano Federal Institute Urutai GO Brazil. guilhermeifgoiano@***. Department of Chemistry College of Science King Khalid University 62529 Abha Saudi Arabia. Research Center for Advanced Materials Science (RCAMS) King Khalid University 62529 Abha Saudi Arabia.

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Nattokinase attenuates endothelial inflammation through the activation of SRF and THBS1

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International Journal of Biological Macromolecules 2024年第PT 2期268卷 131779页

作者： Chiu, Hui-Wen Chou, Chu-Lin Lee, Kung-Ta Shih, Chun-Che Huang, Tzu-Hsuan Sung, Li-Chin Graduate Institute of Clinical Medicine College of Medicine Taipei Medical University Taipei Taiwan Department of Medical Research Shuang Ho Hospital Taipei Medical University New Taipei City Taiwan Ph.D. Program in Drug Discovery and Development Industry College of Pharmacy Taipei Medical University Taipei Taiwan TMU Research Center of Urology and Kidney Taipei Medical University Taipei Taiwan Division of Nephrology Department of Internal Medicine School of Medicine College of Medicine Taipei Medical University Taipei Taiwan Division of Nephrology Department of Internal Medicine Hsin Kuo Min Hospital Taipei Medical University Taoyuan City Taiwan Division of Nephrology Department of Internal Medicine Shuang Ho Hospital Taipei Medical University New Taipei City Taiwan Department of Biochemical Science and Technology National Taiwan University Taipei Taiwan Taipei Heart Institute Taipei Medical University Taipei Taiwan Division of Cardiovascular Surgery Department of Surgery Wan Fang Hospital Taipei Medical University Taipei Taiwan Department of Surgery School of Medicine College of Medicine Taipei Medical University Taipei Taiwan Division of Cardiology Department of Internal Medicine School of Medicine College of Medicine Taipei Medical University Taipei Taiwan Division of Cardiology Department of Internal Medicine Shuang Ho Hospital Taipei Medical University New Taipei City Taiwan Department of General Medicine Shuang Ho Hospital Taipei Medical University New Taipei City Taiwan

Natto contains a potent fibrinolytic enzyme called nattokinase (NK), which has thrombolytic, antihypertensive, antiatherosclerotic and lipid-lowering effects. Although NK has been recognized for its beneficial effect on humans with atherosclerotic cardiovascular disease (ASCVd), the underlying mechanisms involved in vascular inflammation-atherosclerosis development remain largely unknown. The current study aimed to explore the effects of NK on gene regulation, autophagy, necroptosis and inflammasome in vascular inflammation. The transcriptional profiles of NK in endothelial cells (ECs) by RNA sequencing (RNA-seq) revealed that NK affected THBS1, SRF and SREBF1 mRNA expression. In Q-PCR analysis, SRF and THBS1 were upregulated but SREBF1 was unaffected in ECs treated with NK. NK treatment induced autophagy and inhibited NLRP3 inflammasome and necroptosis in ECs. Furthermore, the inhibition of SRF or THBS1 by siRNA suppressed autophagy and enhanced the NLRP3 inflammasome and necroptosis. In a mouse model, NK reduced vascular inflammation by activating autophagy and inhibiting NLRP3 inflammasome and necroptosis. Our findings provide the first evidence that NK upregulates SRF and THBS1 genes, subsequently increasing autophagy and decreasing necroptosis and NLRP3 inflammasome formation to reduce vascular inflammation. Therefore, NK could serve as nutraceuticals or adjuvant therapies to reduce vascular inflammation and possible atherosclerosis progression. © 2024 Elsevier B.V.

关键词： Endothelial cells

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Co-MOF-67/carbon black composite: A novel electrochemical platform for furazolidone detection for food analysis

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Food Chemistry 2025年 489卷

作者： Arunkumar Selvam Meenakumari Gopakumar Gopika Chih-Yu Kuo Beena Saraswathyamma Kareem Yusuf Mani Govindasamy International Graduate Program in Energy and Optoelectronic Materials (EOMP) National Taipei University of Technology Taipei 10608 Taiwan Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei 10608 Taiwan Department of Chemistry Amrita Vishwa Vidyapeetham Amritapuri campus Clappana P O Kollam Kerala 690525 India Department of Chemistry Korea University Seongbuk-gu Seoul Republic of Korea High-Value Biomaterials Research and Commercialization Center National Taipei University of Technology Taipei 106 Taiwan Department of Chemistry College of Science King Saud University Riyadh 11451 Saudi Arabia International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Research Center for Intelligent Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan

Furazolidone (FZd), a nitrofuran antibiotic used for the treatment of bacterial and protozoal illnesses, generates apprehensions about its potential toxicity and mutagenicity. The swift and dependable identification of FZd in food and biological specimens is essential for public health and regulatory adherence. This study presents a novel electrochemical sensor using a glassy carbon electrode (GCE) modified with a cobalt-based metal-organic framework (Co-MOF) and carbon black (CB) composite (Co-MOF@CB/GCE) for the sensitive detection of FZd. The Co-MOF@CB composite enhances electron transport and expands the electroactive surface area. Characterization investigations confirmed the successful fabrication of the Co-MOF@CB/GCE sensor. Electrochemical analyses revealed an extensive detection range (0.4–610 μmolL −1 ) and a minimal detection limit (0.0875 μmolL −1 ). The sensor exhibited great repeatability, stability, and selectivity, demonstrating efficient FZd detection in milk, honey, and chicken. This sensor provides a reliable, economical tool for FZd detection in regulatory and public health contexts.

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Time synchronization between parietal–frontocentral connectivity with MRCP and gait in post-stroke bipedal tasks

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Journal of NeuroEngineering and Rehabilitation 2024年第1期21卷 101页

作者： phang, Chun-Ren Su, Kai-Hsiang Cheng, Yuan-Yang Chen, Chia-Hsin Ko, Li-Wei International Ph.D. Program in Interdisciplinary Neuroscience (UST) College of Biological Science and Technology National Yang Ming Chiao Tung University Hsinchu Taiwan Center for Intelligent Drug Systems and Smart Bio-devices (IDS2B) College of Biological Science and Technology National Yang Ming Chiao Tung University Hsinchu Taiwan Department of Biological Science and Technology College of Biological Science and Technology National Yang Ming Chiao Tung University Hsinchu Taiwan Department of Physical Medicine and Rehabilitation Taichung Veterans General Hospital Taichung Taiwan Department of Post-Baccalaureate Medicine College of Medicine National Chung Hsing University Taichung Taiwan School of Medicine National Yang Ming Chiao Tung University Taipei Taiwan Department of Physical Medicine and Rehabilitation Kaohsiung Medical University Hospital Kaohsiung Taiwan School of Medicine College of Medicine Kaohsiung Medical University Kaohsiung Taiwan Regenerative Medicine and Cell Therapy Research Center Kaohsiung Medical University Kaohsiung Taiwan Institute of Electrical and Control Engineering National Yang Ming Chiao Tung University Hsinchu Taiwan Department of Biomedical Science and Environment Biology Kaohsiung Medical University Kaohsiung Taiwan Drug Development and Value Creation Research Center Kaohsiung Medical University Kaohsiung Taiwan

Background: In post-stroke rehabilitation, functional connectivity (FC), motor-related cortical potential (MRCP), and gait activities are common measures related to recovery outcomes. However, the interrelationship between FC, MRCP, gait activities, and bipedal distinguishability have yet to be investigated. Methods: Ten participants were equipped with EEG devices and inertial measurement units (IMUs) while performing lower limb motor preparation (MP) and motor execution (ME) tasks. MRCP, FCs, and bipedal distinguishability were extracted from the EEG signals, while the change in knee degree during the ME phase was calculated from the gait data. FCs were analyzed with pairwise Pearson’s correlation, and the brain-wide FC was fed into support vector machine (SVM) for bipedal classification. Results: Parietal–frontocentral connectivity (PFCC) dysconnection and MRCP desynchronization were related to the MP and ME phases, respectively. Hemiplegic limb movement exhibited higher PFCC strength than nonhemiplegic limb movement. Bipedal classification had a short-lived peak of 75.1% in the pre-movement phase. These results contribute to a better understanding of the neurophysiological functions during motor tasks, with respect to localized MRCP and nonlocalized FC activities. The difference in PFCCs between both limbs could be a marker to understand the motor function of the brain of post-stroke patients. Conclusions: In this study, we discovered that PFCCs are temporally dependent on lower limb gait movement and MRCP. The PFCCs are also related to the lower limb motor performance of post-stroke patients. The detection of motor intentions allows the development of bipedal brain-controlled exoskeletons for lower limb active rehabilitation. © The Author(s) 2024.

关键词： Brain–computer interface Functional connectivity Motor execution Motor preparation Post-stroke

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Tn antigen suppresses lipopolysaccharide-induced dermatitis via Clec10a

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Biochemical and biophysical research communications 2025年 772卷 152024页

作者： Katsunobu Shigematsu Kenshiro Matsuda Tsukasa Nabekura Kazumasa Kanemaru Kazuko Shibuya Hiroaki Tateno Akira Shibuya Department of Immunology Institute of Medicine University of Tsukuba Ibaraki Tsukuba 305-8577 Japan Ph.D. Program in Humanics University of Tsukuba Ibaraki Tsukuba 305-8577 Japan. Life Science Center for Survival Dynamics Tsukuba Advanced Research Alliance University of Tsukuba Ibaraki Tsukuba 305-8577 Japan R&D Center for Innovative Drug Discovery University of Tsukuba Ibaraki Tsukuba 305-8577 Japan. Electronic address: lancet413@***. R&D Center for Innovative Drug Discovery University of Tsukuba Ibaraki Tsukuba 305-8577 Japan. Cellular and Molecular Biotechnology Research Institute National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba Central 6 1-1-1 Higashi Ibaraki Tsukuba 305-8566 Japan. R&D Center for Innovative Drug Discovery University of Tsukuba Ibaraki Tsukuba 305-8577 Japan. Electronic address: ashibuya@md.tsukuba.ac.jp.

C-type lectin domain family 10 member A (Clec10a), also called macrophage galactose-type lectin 1 (MGL1) or Cd301a, is expressed on myeloid cells, including macrophages in the skin. Several pieces of evidence suggest that Clec10a physically binds to O-linked mucin-like molecules, but the functional ligand that mediates signaling in macrophages remains undetermined. We previously reported that house dust mite (HdM) treatment on the skin produced a greater amount of Toll-like receptor 4 (TLR4)-mediated inflammatory cytokines from macrophage in Clec10a-deficient mice than in wild-type (WT) mice, suggesting that a functional ligand for Clec10a contained in HdM inhibited TLR4-mediated skin macrophage activation. In this study, we investigated the glycan structure of a functional Clec10a ligand (Clec10a-L) contained in HdM. We showed that Clec10a bound to O-linked mucin-like molecules such as polyacrylamide (PAA)-conjugated Tn antigen (Tn antigen-PAA), Core1-PAA, LacNAc-PAA, Lewis A-PAA, and Lewis X-PAA. Among them, plate-coated Tn antigen-PAA, Lewis A-PAA, and Lewis X-PAA activated Clec10a expressed on the reporter cells. However, intradermal injection of only Tn antigen-PAA, but not Lewis A-PAA and Lewis X-PAA, ameliorated LPS-induced dermatitis in WT but not Clec10a-deficient mice. Moreover, Tn antigen-PAA suppressed LPS-induced production of inflammatory cytokines IL-6 and TNF-α by bone marrow-derived cultured macrophage in vitro. These results indicate that Tn antigen is a functional Clec10a-L in HdM that suppresses TLR4-induced macrophage activation in the skin.

关键词： Atopic dermatitis House dust mite NC/Nga mouse Toll-like receptors

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