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Argonaute 5-mediated antiviral defense and viral counter-defense in Nicotiana benthamiana

Virus Research 2023年第1期334卷 199179页

作者： Tu, Chin-Wei Huang, Ying-Wen Lee, Chin-Wei Kuo, Song-Yi Lin, Na-Sheng Hsu, Yau-Heiu Hu, Chung-Chi PhD Program in Microbial Genomics National Chung Hsing University and Academia Sinica Taichung 40227 Taiwan Graduate Institute of Biotechnology National Chung Hsing University Taichung 40227 Taiwan Advanced Plant Biotechnology Center National Chung Hsing University Taichung 40227 Taiwan Temasek Life Sciences Laboratory National University of Singapore Singapore 117604 Singapore Institute of Plant and Microbial Biology Academia Sinica Taipei 11529 Taiwan

The argonaute (AGO) family proteins play a crucial role in preventing viral invasions through the plant antiviral RNA silencing pathway, with distinct AGO proteins recruited for specific antiviral mechanisms. Our previous study revealed that Nicotiana benthamiana AGO5 (NbAGO5) expression was significantly upregulated in response to bamboo mosaic virus (BaMV) infection. However, the roles of NbAGO5 in antiviral mechanisms remained to be explored. In this research, we examined the antiviral functions of NbAGO5 in the infections of different viruses. It was found that the accumulation of NbAGO5 was induced not only at the RNA but also at the protein level following the infections of BaMV, potato virus X (PVX), tobacco mosaic virus (TMV), and cucumber mosaic virus (CMV) in N. benthamiana. To explore the antiviral mechanism and regulatory function of NbAGO5, we generated NbAGO5 overexpression (OE-NbAGO5) and knockout (nbago5) transgenic N. benthamiana lines. Our findings reveal that NbAGO5 provides defense against BaMV, PVX, TMV, and a mutant CMV deficient in 2b gene, but not against the wild-type CMV and turnip mosaic virus (TuMV). Through affinity purification and small RNA northern blotting, we demonstrated that NbAGO5 exerts its antiviral function by binding to viral small interfering RNAs (vsiRNAs). Moreover, we observed that CMV 2b and TuMV HC-Pro interact with NbAGO5, triggering its degradation via the 26S proteasome and autophagy pathways, thereby allowing these viruses to overcome NbAGO5-mediated defense. In addition, TuMV HC-Pro provides another line of counter-defense by interfering with vsiRNA binding by NbAGO5. Our study provides further insights into the antiviral RNA interference mechanism and the complex interplay between NbAGO5 and plant viruses. © 2023

关键词： 26S proteasome AGO5 Autophagy Plant antiviral defense RNA silencing Viral suppressors of RNA silencing (VSR)

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Unveiling the potential of bacterial keratinase with antiacne drugs for cosmeceutical applications: an in silico evaluation

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Journal of Umm Al-Qura University for Applied Sciences 2025年 1-24页

作者： Gaur, Peehoo Polipalli, Yuvaraj Bandhu, Xena Chakravarty, Suhani Banerjee, Srijan Meza, Cynthia Suravajhala, Renuka Sarkar, Shrabana Banerjee, Aparna India International School (IIS) Rajasthan Jaipur India Dr. Durgabhai Deshmukh Senior Secondary School DDU Marg New Delhi India KC Public School Akhnoor Road J&K Jammu India Ankur Senior Secondary School Chandigarh Panjab University Campus Sector 14 Chandigarh India PhD Program in Science R & D Bioactive Products Department Chemistry Institute of Natural Resources University of Talca Talca Chile Doctorado en Biotecnología Traslacional (DBT) Facultad de Ciencias Agrarias y Forestales Universidad Católica del Maule Talca Chile *** Hyderabad India Amrita School of Biotechnology Amrita Vishwa Vidyapeetham Kerala Amritapuri India Functional Polysaccharides Research Group Instituto de Ciencias Aplicadas Facultad de Ingeniería Universidad Autónoma de Chile Talca Chile

The keratinase serves as a catalyst with potential application in various industries, including textiles, leather, pharmaceuticals, cosmetics, and biotechnological applications. Previous studies have predominantly focused on fungal keratinase;however, our present work focuses on bacterial keratinase only. The novelty of using bacterial keratinase over fungal keratinase is because of its faster enzymatic activity, broader substrate specificity, increased stability and cost-effective production, making it efficient and adaptable for industrial applications. However, our present research investigates bacterial keratinase through in silico structural (physicochemical properties, primary, secondary, and tertiary structures) as well as functional analyses (protein–protein interaction networks, subcellular localization, and domain/motif presence), coupled with molecular docking against standard anti-acne drugs in use (adapalene, erythromycin, tretinoin, isotretinoin, and benzoyl peroxide). In this study, two bacterial keratinases, one from mesophilic Pseudomonas aeruginosa (6FZX) and another from thermophilic Meiothermus taiwanensis WR-220 (5WSL) have been studied to demonstrate comparative structural stability and functional activity. These enzymes are intracellular, facilitating proteolysis with metalloendopeptidase activity. Notably, keratinase exhibited a strong binding affinity for adapalene (binding energies of − 8.5 kcal/mol and − 9.6 kcal/mol for 5WSL and 6FZX, respectively) and lowest affinity to erythromycin (binding energy − 6.4 kcal/mol and − 5.9 kcal/mol for 5WSL and 6FZX respectively) among other studied anti-acne drugs like, tretinoin, isotretinoin, and benzoyl peroxide. In the case of de novo designing of anti-acne compounds, enhanced binding affinities are the key factor for selection of potential components. Our in silico analyses indicate that thermophilic keratinase displays better structural stability and functionality, particularly under high pH and h

关键词： Bacteria Cosmeceuticals Functional analyses Keratinase Molecular docking Structural analyses

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Systematic designs of single metal compounds synthesized using ammonia fluoride-based complex as structure directing agents for energy storage

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Journal of Colloid and Interface Science 2023年第PartA期652卷 294-304页

作者： Kuo, Tsung-Rong Zher Yu, You Wu, Chung-Hsien Lee, Pin-Yan Kongvarhodom, Chutima Chen, Hung-Ming Husain, Sadang Yougbaré, Sibidou Lin, Lu-Yin International PhD Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Graduate Institute of Nanomedicine and Medical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei Taiwan Department of Chemical Engineering King Mongkut's University of Technology Thonburi 126 Pracha-u-thit Toong-kru Bangkok10140 Thailand Gingen technology Co. LTD. Rm. 7 10F. No.189 Sec. 2 Keelung Rd. Xinyi Dist. Taipei11054 Taiwan Department of Physics Faculty of Mathematics and Natural Science Lambung Mangkurat University Banjarmasin70124 Indonesia /Nanoro 03 B.P 7192 Ouagadougou 03 Burkina Faso

Tailoring morphology and composition of metal organic frameworks (MOF) can improve energy storage by establishing high surface area, large porosity and multiple redox states. Structure directing agents (SDA) is functional of designing surface properties of electroactive materials. Ammonium fluoride has functional abilities for designing MOF derivatives with excellent energy storage abilities. Systematic design of MOF derivatives using ammonia fluoride-based complex as SDA can essentially create efficient electroactive materials. Metal species can also play significant roles on redox reactions, which are the main energy storage mechanism for battery-type electrodes. In this work, 2-methylimidazole, two novel SDAs of NH4BF4 and NH4HF2, and six metal species of Al, Mn, Co, Ni, Cu and Zn are coupled to synthesize MOF derivatives for energy storage. Metal species-dependent compositions including hydroxides, oxides, and hydroxide nitrates are observed. The nickel-based derivative (Ni-HBF) shows the highest specific capacitance (CF) of 698.0F/g at 20 mV/s, due to multiple redox states and advanced flower-like surface properties. The diffusion and capacitive-control contributions of MOF derivatives are also analyzed. The battery supercapacitor hybrid with Ni-HBF electrode shows a maximum energy density of 27.9 Wh/kg at 325 W/kg. The CF retention of 170.9% and Coulombic efficiency of 93.2% are achieved after 10,000 cycles. © 2023 Elsevier Inc.

关键词： Supercapacitor

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Enhanced light-driven photoelectrochemical catalysis of water splitting by TiO2 nanotubes grown on acid-etched titanium foils

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International Journal of Hydrogen Energy 2024年第PartA期51卷 1483-1493页

作者： Hsiao, Yu-Cheng Lai, Jhih-Hong Fan, Yu-Min Chen, Hung-Ming Yougbaré, Sibidou Saukani, Muhammad Chen, Chih-Yu Wu, Yung-Fu Lin, Lu-Yin International PhD Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Stanford Byers Center for Biodesign Stanford University CA94305-5428 United States Graduate Institute of Biomedical Optomechatronics College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei Taiwan Department of Chemical Engineering Ming Chi University of Technology New Taipei City24301 Taiwan Gingen Technology Co. LTD. Rm. 7 10F. No.189 Sec. 2 Keelung Rd. Xinyi Dist. Taipei11054 Taiwan /Nanoro 03 B.P 7192 Ouagadougou03 Burkina Faso Department of Mechanical Engineering Faculty of Engineering Universitas Islam Kalimantan MAB Jl. Adhyaksa No. 2 Banjarmasin70124 Indonesia Department of Orthopedics Shuang Ho Hospital Taipei Medical University New Taipei City23561 Taiwan International Ph.D. Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Cell Physiology and Molecular Image Research Center Wan Fang Hospital Taipei Medical University Taipei11696 Taiwan

Titanium dioxide with suitable band edges is one of promising photocatalysts for water splitting. Nanotubes with one-dimensional structure can induce efficient charge transfers and hollow centers can provide large surface area for surface reactions. Modifying Ti foils for anodization can enhance light utilization of TiO2 nanotube photoelectrodes. In this work, it is firstly to fabricate TiO2 nanotube photoelectrodes on acid-etched Ti foils by anodization (MNT) for photoelectrochemical catalyzing water splitting. Different acid-etching durations are applied on Ti foils to induce various rugged surfaces. The resulting photoelectrodes present largely enhanced light utilization than that fabricated by the pristine Ti foil. The anodization duration is also optimized to find suitable lengths of MNT. The smallest overpotential of 524.7 mV at 10 mA/cm2 and Tafel slope of 167 mV/dec are obtained for the optimal MNT photoelectrode. The TiO2 nanotubes grown on the pristine Ti foil shows the overpotential of 679.3 mV at 10 mA/cm2 and Tafel slope of 285 mV/dec. This result opens a blueprint for raising the photocatalytic ability by simply modifying the surface property of the conductive substrate. Other modifications may be applicable to enhance the roughness of Ti foils for growing more efficient MNT array as photocatalysis of water splitting. © 2023 Hydrogen Energy Publications LLC

关键词： Titanium dioxide

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Comprehensive evaluation of benign and malignant etiologies of different serous effusions with the International System for Reporting Serous Fluid Cytopathology: A multi-institutional study in Taiwan

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Cancer cytopathology 2024年第3期132卷 169-178页

作者： Chun-Han Lu Chih-Yi Liu Jie-Yang Jhuang Chien-Chin Chen Department of Medical Education Ditmanson Medical Foundation Chia-Yi Christian Hospital Chiayi City Taiwan. Division of Pathology Sijhih Cathay General Hospital New Taipei City Taiwan. Department of Pathology Mackay Memorial Hospital Taipei City Taiwan. Department of Pathology Ditmanson Medical Foundation Chia-Yi Christian Hospital Chiayi City Taiwan. PhD Program in Translational Medicine Rong Hsing Research Center for Translational Medicine National Chung Hsing University Taichung City Taiwan. Department of Biotechnology and Bioindustry Sciences College of Bioscience and Biotechnology National Cheng Kung University Tainan City Taiwan. Department of Cosmetic Science Chia Nan University of Pharmacy and Science Tainan City Taiwan.

BACKGROUND:The International System for Reporting Serous Fluid Cytopathology (ISRSFC) was introduced globally in 2019 in response to the absence of a standardized reporting system for serous fluid cytology. This study presents experiences implementing this system across three distinct hospitals in Taiwan. METHODS:A total of 6177 serous fluid specimens in three hospitals in Taiwan between 2018 and 2020 were retrospectively reviewed and reclassified according to the ISRSFC. Cytohistological correlation and chart review were further performed to investigate etiologies and risks of malignancy (ROMs). RESULTS:Reclassification showed that 34 (0.7%) of 4838 pleural effusions were nondiagnostic (ND), 4086 (84.5%) were negative for malignancy (NFM), 201 (4.2%) were atypia of undetermined significance (AUS), 92 (1.9%) were suspicious for malignancy (SFM), and 425 (8.8%) were malignant (MAL). The 1231 ascites cases contained 13 (1.1%) ND, 1004 (81.6%) NFM, 53 (4.3%) AUS, 31 (2.5%) SFM, and 130 (10.6%) MAL specimens. In pleural effusions, the ROM was 2.9% for ND, 14.0% for NFM, 52.2% for AUS, 85.9% for SFM, and 95.1% for MAL. In ascites, it was 15.4% for ND, 19.1% for NFM, 52.8% for AUS, 83.9% for SFM, and 92.3% for MAL. In pericardial effusions, it was 0.0% for ND, 11.6% for NFM, 30.8% for AUS, 100.0% for SFM, and 95.2% for MAL. Different effusions' most common benign and malignant etiologies were also disclosed. CONCLUSIONS:These multi-institutional data have determined the diagnostic usefulness of the ISRSFC, which provides pathologists and physicians with invaluable assistance in correctly classifying effusions for further management.

关键词： International System for Reporting Serous Fluid Cytopathology ascites cytology effusion pericardial pleura

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Demethoxymurrapanine, an indole-naphthoquinone alkaloid, inhibits the proliferation of oral cancer cells without major side effects on normal cells

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Environmental Toxicology 2024年第3期39卷 1221-1234页

作者： Chuang, Ya-Ting Yen, Ching-Yu Shiau, Jun-Ping Chang, Fang-Rong Duh, Chang-Yih Sung, Ping-Jyun Chen, Kuan-Liang Tsai, Yi-Hong Tang, Jen-Yang Jeng, Jiiang-Huei Sheu, Jyh-Horng Chang, Hsueh-Wei Department of Biomedical Science and Environmental Biology PhD Program in Life Sciences College of Life Science Kaohsiung Medical University Kaohsiung Taiwan School of Dentistry Taipei Medical University Taipei Taiwan Department of Oral and Maxillofacial Surgery Chi-Mei Medical Center Tainan Taiwan Division of Breast Oncology and Surgery Department of Surgery Kaohsiung Medical University Hospital Kaohsiung Medical University Kaohsiung Taiwan Graduate Institute of Natural Products Kaohsiung Medical University Kaohsiung Taiwan Department of Marine Biotechnology and Resources National Sun Yat-sen University Kaohsiung Taiwan National Museum of Marine Biology and Aquarium Pingtung Taiwan Department of Pharmacy and Master Program College of Pharmacy and Health Care Tajen University Pingtung Taiwan School of Post-Baccalaureate Medicine Kaohsiung Medical University Kaohsiung Taiwan Department of Radiation Oncology Kaohsiung Medical University Hospital Kaohsiung Medical University Kaohsiung Taiwan School of Dentistry College of Dental Medicine Kaohsiung Medical University Kaohsiung Taiwan Department of Dentistry Kaohsiung Medical University Hospital Kaohsiung Taiwan Department of Dentistry National Taiwan University Hospital Taipei Taiwan Department of Medical Research China Medical University Hospital China Medical University Taichung Taiwan Department of Medical Research Kaohsiung Medical University Hospital Kaohsiung Taiwan Center for Cancer Research Kaohsiung Medical University Kaohsiung Taiwan

Antioral cancer drugs need a greater antiproliferative impact on cancer than on normal cells. Demethoxymurrapanine (DEMU) inhibits proliferation in several cancer cells, but an in-depth investigation was necessary. This study evaluated the proliferation-modulating effects of DEMU, focusing on oral cancer and normal cells. DEMU (0, 2, 3, and 4 μg/mL) at 48 h treatments inhibited the proliferation of oral cancer cells (the cell viability (%) for Ca9-22 cells was 100.0 ± 2.2, 75.4 ± 5.6, 26.0 ± 3.8, and 15.4 ± 1.4, and for CAL 27 cells was 100.0 ± 9.4, 77.2 ± 5.9, 57.4 ± 10.7, and 27.1 ± 1.1) more strongly than that of normal cells (the cell viability (%) for S-G cells was 100.0 ± 6.6, 91.0 ± 4.6, 95.0 ± 2.6, and 95.8 ± 5.5), although this was blocked by the antioxidant N-acetylcysteine. The presence of oxidative stress was evidenced by the increase of reactive oxygen species and mitochondrial superoxide and the downregulation of the cellular antioxidant glutathione in oral cancer cells, but these changes were minor in normal cells. DEMU also caused greater induction of the subG1 phase, extrinsic and intrinsic apoptosis (annexin V and caspases 3, 8, and 9), and DNA damage (γH2AX and 8-hydroxy-2-deoxyguanosine) in oral cancer than in normal cells. N-acetylcysteine attenuated all these DEMU-induced changes. Together, these data demonstrate the preferential antiproliferative function of DEMU in oral cancer cells, with the preferential induction of oxidative stress, apoptosis, and DNA damage in these cancer cells, and low cytotoxicity toward normal cells. © 2023 Wiley Periodicals LLC.

关键词： Oxidative stress

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Artificial intelligence in gastrointestinal radiology: A review with special focus on recent development of magnetic resonance and computed tomography

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Artificial Intelligence in Gastroenterology 2021年第2期2卷 27-41页

作者： Kai-Po Chang Shih-Huan Lin Yen-Wei Chu PhD Program in Medical Biotechnology National Chung Hsing UniversityTaichung 40227Taiwan Department of Pathology China Medical University HospitalTaichung 40447Taiwan Institute of Genomics and Bioinformatics National Chung Hsing UniversityTaichung 40227Taiwan Institute of Molecular Biology National Chung Hsing UniversityTaichung 40227Taiwan Agricultural Biotechnology Center National Chung Hsing UniversityTaichung 40227Taiwan Biotechnology Center National Chung Hsing UniversityTaichung 40227Taiwan PhD Program in Translational Medicine National Chung Hsing UniversityTaichung 40227Taiwan Rong Hsing Research Center for Translational Medicine Taichung 40227Taiwan

Artificial intelligence(AI),particularly the deep learning technology,have been proven influential to radiology in the recent *** ability in image classification,segmentation,detection and reconstruction tasks have substantially assisted diagnostic radiology,and has even been viewed as having the potential to perform better than radiologists in some *** radiology,an important subspecialty dealing with complex anatomy and various modalities including endoscopy,have especially attracted the attention of AI researchers and engineers ***,recently many tools have been developed for lesion detection and image construction in gastrointestinal radiology,particularly in the fields for which public databases are available,such as diagnostic abdominal magnetic resonance imaging(MRI)and computed tomography(CT).This review will provide a framework for understanding recent advancements of AI in gastrointestinal radiology,with a special focus on hepatic and pancreatobiliary diagnostic radiology with MRI and *** fields where AI is less developed,this review will also explain the difficulty in AI model training and possible strategies to overcome the technical *** authors’insights of possible future development will be addressed in the last section.

关键词： Artificial intelligence Deep learning Image diagnosis Radiology Magnetic resonance imaging Computed tomography

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Facile synthesis of copper cobalt sulfide and nickel hydroxide tube-like composites as battery-type active material of energy storage devices

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Journal of Energy Storage 2023年 65卷

作者： Kuo, Tsung-Rong Fitriannisa, Istikhori Chung, Ren-Jei Lin, Kuan-Hsien Yougbaré, Sibidou Lin, Lu-Yin Wu, Yung-Fu International PhD Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Graduate Institute of Nanomedicine and Medical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei Taiwan BP 218 11 Nanoro Burkina Faso Department of Chemical Engineering Ming Chi University of Technology New Taipei City24301 Taiwan

Bimetallic sulfide has attracted much attentions as efficient electroactive materials of battery supercapacitor hybrid (BSH), because of numerous redox states, high conductivity and good energy efficiency. Developing composites having excellent chemical and electrochemical properties is necessary to enhance the energy storage features of bimetallic sulfides. In this study, CuCo2S4 and Ni(OH)2 composites (CuCo2S4@Ni(OH)2) are designed on Ni foam via the facial hydrothermal process and chemical bath deposition as the electroactive material of BSH at first time. Effects of Ni(OH)2 amounts on CuCo2S4 on electrochemical and physical properties of CuCo2S4@Ni(OH)2 are investigated. The physical mixed CuCo2S4 and Ni(OH)2 composite is also fabricated to verify synergistic effects of CuCo2S4@Ni(OH)2. A higher specific capacitance (CF) of 1583.9 F/g along with the capacity of 220.0 mAh/g are got for optimal CuCo2S4@Ni(OH)2 electrode, respectively comparing to 831.7 and 1063.3 F/g of CuCoS4 and Ni(OH)2 electrodes. A BSH is fabricated by the CuCo2S4@Ni(OH)2 electrode and the activated carbon electrode. The potential window of 1.6 V and maximum energy density of 32.1 Wh/kg at 1.1 kW/kg are achieved. The CF retention of 78% and Coulombic efficiency higher than 97% in 8000 charge/discharge cycles are also obtained for this BSH. © 2023

关键词： Sulfur compounds

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Potential applications of gene expression profiles obtained from circulating extracellular vesicles in breast cancer

The journal of liquid biopsy

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The journal of liquid biopsy 2025年 7卷 100287页

作者： Aritra Gupta Siddharth Bhardwaj Sayan Ghorai Rosina Ahmed Sanjit Agarwal Geetashree Mukherjee Kartiki V Desai Biotechnology Research Innovation Council-National Institute of Biomedical Genomics (BRIC-NIBMG) Kalyani India. Regional Centre for Biotechnology PhD Program India. Tata Medical Centre 14 MAR (DH Block) New Town Rajarhat Kolkata 700160 India.

Background:Liquid biopsy-based biomarkers offer several advantages since they are minimally invasive, can be useful in longitudinal monitoring of the disease and have higher patient compliance. We describe a protocol using minimal volumes of archival and prospective serum/plasma samples to define the RNA contents of EVs and discuss its benefits and limitations. Methods:RNA-seq analysis of matched tumor biopsy, circulating EVs from breast cancer patients (EV-C, n = 26) and healthy donors (EV-H, n = 4) was performed and differentially expressed genes were validated by RT-PCR in a separate series of samples (EV-C, n = 32 and EV-H, n = 22). A total of 84 samples were studied. Results:RNA-seq data from 500 μl serum samples yielded more than 17000 genes, of which 320 were DEGs (adjusted p value ≤ 0.05) between EV-C and EV-H samples. Pathways for Myc V1, reactive oxygen species, angiogenesis, allograft rejection and Interferon regulated genes were over-represented in EV-C samples. Computational deconvolution algorithms for cell signatures identified immune cells such as Th1 and memory T-cells, endothelial cells, and osteoblasts from the stromal compartment as significant. Top 6 genes were validated by qRT-PCR in all samples (n = 84) and they consistently and correctly classified cancer and healthy groups. An independent set of 374 and 640 DEGs could segregate ER positive/ER negative and non-metastatic versus metastatic samples, respectively. EVs from metastatic samples had higher variability in gene expression patterns whereas those from non-metastatic samples showed a better correlation. Conclusion:By using low serum amounts successfully for EV transcriptomics, we demonstrate that a minimally invasive technique could be converted to a microinvasive format. These data lay the foundation for EV RNA based biomarker discovery for segregating breast cancers.

关键词： Diagnosis Liquid biopsy Transcriptomics

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QTL analysis for ascorbic acid content in strawberry fruit reveals a complex genetic architecture and association with GDP-L-galactose phosphorylase

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Horticulture Research 2023年第3期10卷 136-150页

作者： Pilar Muñoz Cristina Castillejo JoséAntonio Gómez Luis Miranda Silke Lesemann Klaus Olbricht Aurélie Petit Philippe Chartier Annika Haugeneder Johanna Trinkl Luca Mazzoni Agnieszka Masny Edward Zurawicz Freya Maria Rosemarie Ziegler Björn Usadel Wilfried Schwab Béatrice Denoyes Bruno Mezzetti Sonia Osorio JoséFSánchez-Sevilla Iraida Amaya Centro IFAPA de Málaga Instituto Andaluz de Investigación y Formación Agraria y Pesquera(IFAPA)29140MálagaSpain PhD program in Advanced Biotechnology Universidad de Málaga29071MálagaSpain Finca el Cebollar Centro IFAPA las Torres04745HuelvaSpain Hansabred GmbH&Co.KG 01108DresdenGermany INVENIO 33800BordeauxFrance Biotechnology of Natural Products Technische Universität München85354FreisingGermany Dipartimento di Scienze Agrarie Alimentari e AmbientaliUniversitàPolitecnica delle Marche60131AnconaItaly Department of Horticultural Crop Breeding the National Institute of Horticultural ResearchKonstytucji 3 Maja 1/396-100SkierniewicePoland Institute of Bio-and Geosciences Bioinformatics(IBG-4)Forschungszentrum Jülich GmbH52428JülichGermany Univ.Bordeaux INRAEBiologie du Fruit et PathologieUMR 1332F-33140France Departamento de Biología Molecular y Bioquímica Instituto de Hortofruticultura Subtropical y Mediterránea"La Mayora"Universidad de Málaga-Consejo Superior de Investigaciones CientíficasCampus de Teatinos29071 MálagaSpain Unidad Asociada de I+D+i IFAPA-CSIC Biotecnología y Mejora en Fresa 29010MálagaSpain.

Strawberry(Fragaria×ananassa)fruits are an excellent source of L-ascorbic acid(AsA),a powerful antioxidant for plants and *** the genetic components underlying AsA accumulation is crucial for enhancing strawberry nutritional ***,we unravel the genetic architecture of AsA accumulation using an F1 population derived from parental lines‘Candonga’and‘Senga Sengana’,adapted to distinct Southern and Northern European *** account for environmental effects,the F1 and parental lines were grown and phenotyped in five locations across Europe(France,Germany,Italy,Poland and Spain).Fruit AsA content displayed normal distribution typical of quantitative traits and ranged five-fold,with significant differences among genotypes and *** content in each country and the average in all of them was used in combination with 6,974 markers for quantitative trait locus(QTL)*** stable QTLs for AsA content were detected in linkage group(LG)3A,LG 5A,LG 5B,LG 6B and LG *** genes were identified within stable QTL intervals and expression analysis in lines with contrasting AsA content suggested that GDP-L-Galactose Phosphorylase FaGGP(3A),and the chloroplast-located AsA transporter gene FaPHT4;4(7C)might be the underlying genetic factors for QTLs on LG 3A and 7C,*** show that recessive alleles of FaGGP(3A)inherited from both parental lines increase fruit AsA ***,expression of FaGGP(3A)was two-fold higher in lines with high *** here identified represent a useful resource for efficient selection of new strawberry cultivars with increased AsA content.

关键词： straw cultivar content

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