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Lu TF, Wang PW, Cheng YF, Yen YT, Wu YS. Enhanced Nanotwinned Copper Bonding through Epoxy-Induced Copper Surface Modification. Nanomaterials (Basel) 2024; 14:771. [PMID: 38727365 PMCID: PMC11085207 DOI: 10.3390/nano14090771] [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: 03/29/2024] [Revised: 04/18/2024] [Accepted: 04/25/2024] [Indexed: 05/12/2024]
Abstract
For decades, Moore's Law has neared its limits, posing significant challenges to further scaling it down. A promising avenue for extending Moore's Law lies in three-dimensional integrated circuits (3D ICs), wherein multiple interconnected device layers are vertically bonded using Cu-Cu bonding. The primary bonding mechanism involves Cu solid diffusion bonding. However, the atomic diffusion rate is notably low at temperatures below 300 °C, maintaining a clear and distinct weak bonding interface, which, in turn, gives rise to reliability issues. In this study, a new method of surface modification using epoxy resin to form fine grains on a nanotwinned Cu film was proposed. When bonded at 250 °C, the interfacial grains grew significantly into both sides of the Cu film. When bonded at 300 °C, the interfacial grains extended extensively, eventually eliminating the original bonding interface.
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Affiliation(s)
| | | | | | | | - YewChung Sermon Wu
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan; (T.-F.L.); (P.-W.W.); (Y.-F.C.)
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2
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Yen YT, Park JH, Kang SH, Su T, Cheng H, Wen WC, Lin SS, Tai YL, Chen PN, Tsai SC. Clinical Benefits of Golden-Antrodia Camphorata Containing Antroquinonol in Liver Protection and Liver Fat Reduction After Alcoholic Hepatitis. Front Pharmacol 2022; 13:757494. [PMID: 35800453 PMCID: PMC9253287 DOI: 10.3389/fphar.2022.757494] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 05/30/2022] [Indexed: 12/12/2022] Open
Abstract
Objective: It has been reported that antroquinonol extracted from Golden-Antrodia camphorate exerts protective effects on liver function both in vitro and in vivo. However, the protective effects of Golden-Antrodia camphorata on liver function have not been fully investigated in human clinical studies. Therefore, the present study aimed to evaluate the beneficial effects of Golden-Antrodia camphorata on hepatic function after alcohol consumption in human subjects. Methods: A total of 80 participants with increased γ-glutamyl transferase levels (60–180 U/L) were enrolled in the current study and were randomly divided into two groups. Participants in the first group were orally administrated with 300 mg/day Golden-Antrodia camphorata (tablets), while those in the second group received placebo tablets for 12 weeks. Biochemical routine blood tests were performed at 6 and 12 weeks following the first administration. Results: At 12 weeks post the first Golden-Antrodia camphorata administration, the serum levels of aspartate aminotransferase (AST; p < 0.0001), alanine aminotransferase (ALT; p = 0.0002) and triglyceride (p = 0.0158) were notably declined in the Golden-Antrodia camphorata treatment group compared with the placebo group. No clinically significant differences were observed between the Golden-Antrodia camphorata treatment and placebo groups in terms of general safety parameters. Conclusion: A statistically significant difference was obtained in the serum levels of AST, ALT and triglycerides between the Golden-Antrodia camphorata and placebo groups. However, no clinical significance was observed in any of the safety parameters examined. Overall, these findings indicated that treatment with Golden-Antrodia camphorata exerted protective effects on liver function.
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Affiliation(s)
- Yu-Ting Yen
- Drug Development Center, Institute of New Drug Development, Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan
| | - Joo-Hyun Park
- Department of Family Medicine, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, South Korea
| | - Seung-Hyun Kang
- Clinical Research Center of H PLUS Yangji Hospital, Seoul, South Korea
| | - Today Su
- Golden Biotechnology Corporation, New Taipei City, Taiwan
| | - Howard Cheng
- Golden Biotechnology Corporation, New Taipei City, Taiwan
| | - Wu-Che Wen
- Golden Biotechnology Corporation, New Taipei City, Taiwan
| | - Shin-Shiou Lin
- Golden Biotechnology Corporation, New Taipei City, Taiwan
| | - Yu-Ling Tai
- Golden Biotechnology Corporation, New Taipei City, Taiwan
| | - Pei-Ni Chen
- Golden Biotechnology Corporation, New Taipei City, Taiwan
- *Correspondence: Pei-Ni Chen, ; Shih-Chang Tsai,
| | - Shih-Chang Tsai
- Department of Biological Science and Technology, China Medical University, Taichung, Taiwan
- *Correspondence: Pei-Ni Chen, ; Shih-Chang Tsai,
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Yen YT, Chien M, Wu PY, Ho CC, Ho CT, Huang KCY, Chiang SF, Chao KSC, Chen WTL, Hung SC. Protein phosphatase 2A inactivation induces microsatellite instability, neoantigen production and immune response. Nat Commun 2021; 12:7297. [PMID: 34911954 PMCID: PMC8674339 DOI: 10.1038/s41467-021-27620-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 03/26/2021] [Accepted: 12/02/2021] [Indexed: 12/21/2022] Open
Abstract
Microsatellite-instable (MSI), a predictive biomarker for immune checkpoint blockade (ICB) response, is caused by mismatch repair deficiency (MMRd) that occurs through genetic or epigenetic silencing of MMR genes. Here, we report a mechanism of MMRd and demonstrate that protein phosphatase 2A (PP2A) deletion or inactivation converts cold microsatellite-stable (MSS) into MSI tumours through two orthogonal pathways: (i) by increasing retinoblastoma protein phosphorylation that leads to E2F and DNMT3A/3B expression with subsequent DNA methylation, and (ii) by increasing histone deacetylase (HDAC)2 phosphorylation that subsequently decreases H3K9ac levels and histone acetylation, which induces epigenetic silencing of MLH1. In mouse models of MSS and MSI colorectal cancers, triple-negative breast cancer and pancreatic cancer, PP2A inhibition triggers neoantigen production, cytotoxic T cell infiltration and ICB sensitization. Human cancer cell lines and tissue array effectively confirm these signaling pathways. These data indicate the dual involvement of PP2A inactivation in silencing MLH1 and inducing MSI.
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Affiliation(s)
- Yu-Ting Yen
- grid.254145.30000 0001 0083 6092Drug Development Center, Institute of New Drug Development, China Medical University, Taichung, 40402 Taiwan ,grid.411508.90000 0004 0572 9415Integrative Stem Cell Center, China Medical University Hospital, Taichung, 40402 Taiwan
| | - May Chien
- grid.254145.30000 0001 0083 6092Drug Development Center, Institute of New Drug Development, China Medical University, Taichung, 40402 Taiwan ,grid.411508.90000 0004 0572 9415Integrative Stem Cell Center, China Medical University Hospital, Taichung, 40402 Taiwan
| | - Pei-Yi Wu
- grid.254145.30000 0001 0083 6092Drug Development Center, Institute of New Drug Development, China Medical University, Taichung, 40402 Taiwan ,grid.411508.90000 0004 0572 9415Integrative Stem Cell Center, China Medical University Hospital, Taichung, 40402 Taiwan
| | - Chi-Chang Ho
- grid.254145.30000 0001 0083 6092Drug Development Center, Institute of New Drug Development, China Medical University, Taichung, 40402 Taiwan ,grid.411508.90000 0004 0572 9415Integrative Stem Cell Center, China Medical University Hospital, Taichung, 40402 Taiwan
| | - Chun-Te Ho
- grid.254145.30000 0001 0083 6092Drug Development Center, Institute of New Drug Development, China Medical University, Taichung, 40402 Taiwan ,grid.411508.90000 0004 0572 9415Integrative Stem Cell Center, China Medical University Hospital, Taichung, 40402 Taiwan
| | - Kevin Chih-Yang Huang
- grid.254145.30000 0001 0083 6092Department of Biomedical Imaging and Radiological Science, China Medical University, Taichung, 40402 Taiwan ,grid.254145.30000 0001 0083 6092Translation Research Core, China Medical University Hospital, China Medical University, Taichung, 40402 Taiwan
| | - Shu-Fen Chiang
- grid.254145.30000 0001 0083 6092Proton Therapy and Science Center, China Medical University Hospital, China Medical University, Taichung, Taiwan 40402 ROC ,grid.454740.6Lab of Precision Medicine, Feng-Yuan Hospital, Ministry of Health and Welfare, Taichung, 42055 Taiwan
| | - K. S. Clifford Chao
- grid.254145.30000 0001 0083 6092Proton Therapy and Science Center, China Medical University Hospital, China Medical University, Taichung, Taiwan 40402 ROC
| | - William Tzu-Liang Chen
- grid.254145.30000 0001 0083 6092Department of Colorectal Surgery, China Medical University Hospital, China Medical University, Taichung, 40402 Taiwan ,grid.254145.30000 0001 0083 6092Department of Colorectal Surgery, China Medical University HsinChu Hospital, China Medical University, HsinChu, 302 Taiwan
| | - Shih-Chieh Hung
- Drug Development Center, Institute of New Drug Development, China Medical University, Taichung, 40402, Taiwan. .,Integrative Stem Cell Center, China Medical University Hospital, Taichung, 40402, Taiwan. .,Department of Orthopaedics, China Medical University Hospital, Taichung, 40402, Taiwan.
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4
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Chiu MC, Chang SH, Yen YT, Liao LY, Lin HJ. Timing and magnitude of climatic extremes differentially elevate mortality but enhance recovery in a fish population. Glob Chang Biol 2021; 27:6117-6128. [PMID: 34520600 DOI: 10.1111/gcb.15886] [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] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 07/04/2021] [Accepted: 09/03/2021] [Indexed: 06/13/2023]
Abstract
The countervailing effects of disturbances (e.g., high mortality and enhanced recovery) on population dynamics can occur through demographic processes under rapidly increasing climatic extremes. Across an extreme-event gradient, we mechanistically demonstrated how dramatic changes in streamflow have affected the population persistence of endangered salmon in monsoonal Taiwan over a three-decade period. Our modeling indicated that the dynamics of the age-structured population were attributed to demographic processes, in which extensive mortality was characterized as a function of climatic extremes and vulnerability in the young stage of fish. In the stochastic simulations, we found that the extensive mortality and high proportion of large fish resulted from extreme flooding, which caused high values of postimpact population recovery. Our empirical evidence suggests that the magnitudes and timing of disturbance can explain the population persistence when facing climatic extremes and thereby challenges the understanding of the mechanistic drivers of these countervailing phenomena under changing environmental conditions.
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Affiliation(s)
- Ming-Chih Chiu
- Center for Marine Environmental Studies (CMES), Ehime University, Matsuyama, Japan
- Department of Entomology, National Chung Hsing University, Taichung, Taiwan
| | - Shih-Hsun Chang
- Department of Life Sciences and Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University, Taichung, Taiwan
| | - Yu-Ting Yen
- Institute of Bioinformatics and Structural Biology, National Tsing Hua University, Hsinchu, Taiwan
| | - Lin-Yan Liao
- Wuling Station, Shei-Pa National Park, Taichung, Taiwan
| | - Hsing-Juh Lin
- Department of Life Sciences and Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University, Taichung, Taiwan
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5
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Ho CT, Wu MH, Chen MJ, Lin SP, Yen YT, Hung SC. Combination of Mesenchymal Stem Cell-Delivered Oncolytic Virus with Prodrug Activation Increases Efficacy and Safety of Colorectal Cancer Therapy. Biomedicines 2021; 9:548. [PMID: 34068264 PMCID: PMC8153168 DOI: 10.3390/biomedicines9050548] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 05/04/2021] [Accepted: 05/11/2021] [Indexed: 12/24/2022] Open
Abstract
Although oncolytic viruses are currently being evaluated for cancer treatment in clinical trials, systemic administration is hindered by many factors that prevent them from reaching the tumor cells. When administered systemically, mesenchymal stem cells (MSCs) target tumors, and therefore constitute good cell carriers for oncolytic viruses. MSCs were primed with trichostatin A under hypoxia, which upregulated the expression of CXCR4, a chemokine receptor involved in tumor tropism, and coxsackievirus and adenovirus receptor that plays an important role in adenoviral infection. After priming, MSCs were loaded with conditionally replicative adenovirus that exhibits limited proliferation in cells with a functional p53 pathway and encodes Escherichia coli nitroreductase (NTR) enzymes (CRAdNTR) for targeting tumor cells. Primed MSCs increased tumor tropism and susceptibility to adenoviral infection, and successfully protected CRAdNTR from neutralization by anti-adenovirus antibodies both in vitro and in vivo, and specifically targeted p53-deficient colorectal tumors when infused intravenously. Analyses of deproteinized tissues by UPLC-MS/QTOF revealed that these MSCs converted the co-administered prodrug CB1954 into cytotoxic metabolites, such as 4-hydroxylamine and 2-amine, inducing oncolysis and tumor growth inhibition without being toxic for the host vital organs. This study shows that the combination of oncolytic viruses delivered by MSCs with the activation of prodrugs is a new cancer treatment strategy that provides a new approach for the development of oncolytic viral therapy for various cancers.
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Affiliation(s)
- Chun-Te Ho
- Drug Development Center, Institute of New Drug Development, Institute of Biomedical Sciences, School of Medicine, China Medical University, Taichung 404, Taiwan; (C.-T.H.); (Y.-T.Y.)
- Integrative Stem Cell Center, Department of Orthopaedics, China Medical University Hospital, Taichung 404, Taiwan
| | - Mei-Hsuan Wu
- Institute of Clinical Medicine, School of Medicine, National Yang-Ming University, Taipei 112, Taiwan; (M.-H.W.); (S.-P.L.)
| | - Ming-Jen Chen
- Department of Surgery, MacKay Memorial Hospital & Department of Medicine, MacKay Medical College, New Taipei City 252, Taiwan;
| | - Shih-Pei Lin
- Institute of Clinical Medicine, School of Medicine, National Yang-Ming University, Taipei 112, Taiwan; (M.-H.W.); (S.-P.L.)
| | - Yu-Ting Yen
- Drug Development Center, Institute of New Drug Development, Institute of Biomedical Sciences, School of Medicine, China Medical University, Taichung 404, Taiwan; (C.-T.H.); (Y.-T.Y.)
- Integrative Stem Cell Center, Department of Orthopaedics, China Medical University Hospital, Taichung 404, Taiwan
| | - Shih-Chieh Hung
- Drug Development Center, Institute of New Drug Development, Institute of Biomedical Sciences, School of Medicine, China Medical University, Taichung 404, Taiwan; (C.-T.H.); (Y.-T.Y.)
- Integrative Stem Cell Center, Department of Orthopaedics, China Medical University Hospital, Taichung 404, Taiwan
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Tsai SC, Lu CC, Bau DT, Chiu YJ, Yen YT, Hsu YM, Fu CW, Kuo SC, Lo YS, Chiu HY, Juan YN, Tsai FJ, Yang JS. Approaches towards fighting the COVID‑19 pandemic (Review). Int J Mol Med 2021; 47:3-22. [PMID: 33236131 PMCID: PMC7723515 DOI: 10.3892/ijmm.2020.4794] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [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: 08/17/2020] [Accepted: 11/04/2020] [Indexed: 11/05/2022] Open
Abstract
The coronavirus disease 2019 (COVID‑19) outbreak, which has caused >46 millions confirmed infections and >1.2 million coronavirus related deaths, is one of the most devastating worldwide crises in recent years. Infection with COVID‑19 results in a fever, dry cough, general fatigue, respiratory symptoms, diarrhoea and a sore throat, similar to those of acute respiratory distress syndrome. The causative agent of COVID‑19, SARS‑CoV‑2, is a novel coronavirus strain. To date, remdesivir has been granted emergency use authorization for use in the management of infection. Additionally, several efficient diagnostic tools are being actively developed, and novel drugs and vaccines are being evaluated for their efficacy as therapeutic agents against COVID‑19, or in the prevention of infection. The present review highlights the prevalent clinical manifestations of COVID‑19, characterizes the SARS‑CoV‑2 viral genome sequence and life cycle, highlights the optimal methods for preventing viral transmission, and discusses possible molecular pharmacological mechanisms and approaches in the development of anti‑SARS‑CoV‑2 therapeutic agents. In addition, the use of traditional Chinese medicines for management of COVID‑19 is discussed. It is expected that novel anti‑viral agents, vaccines or an effective combination therapy for treatment/management of SARS‑CoV‑2 infection and spread therapy will be developed and implemented in 2021, and we would like to extend our best regards to the frontline health workers across the world in their fight against COVID‑19.
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Affiliation(s)
- Shih-Chang Tsai
- Department of Biological Science and Technology, China Medical University
| | - Chi-Cheng Lu
- Department of Sport Performance, National Taiwan University of Sport
| | - Da-Tian Bau
- Graduate Institute of Biomedical Sciences, China Medical University
- Terry Fox Cancer Research Laboratory, Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 40402
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung 41354
| | - Yu-Jen Chiu
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Taipei Veteran General Hospital
- Department of Surgery, School of Medicine, National Yang Ming University, Taipei 11217
| | - Yu-Ting Yen
- Drug Development Center, Institute of New Drug Development, China Medical University, Taichung 40402
| | - Yuan-Man Hsu
- Department of Biological Science and Technology, China Medical University
| | - Chih-Wei Fu
- Biomedical Technology and Device Research Laboratories, Industrial Technology Research Institute, Hsinchu 310401
| | - Sheng-Chu Kuo
- School of Pharmacy, China Medical University, Taichung 40402
| | - Yu-Shiang Lo
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 40447
| | - Hong-Yi Chiu
- Department of Pharmacy, Buddhist Tzu Chi General Hospital, Hualien 97002
- Master and PhD Program in Pharmacology and Toxicology, School of Medicine, Tzu Chi University, Hualien 97004
- General Education Center, Tzu Chi University of Science and Technology, Hualien 97005
| | - Yu-Ning Juan
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 40447
| | - Fuu-Jen Tsai
- School of Chinese Medicine, College of Chinese Medicine, China Medical University
- China Medical University Children's Hospital, China Medical University, Taichung 40402, Taiwan, R.O.C
| | - Jai-Sing Yang
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 40447
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Yen YT, Chien M, Lai YC, Chen DP, Chuong CM, Hung MC, Hung SC. PP2A Deficiency Enhances Carcinogenesis of Lgr5 + Intestinal Stem Cells Both in Organoids and In Vivo. Cells 2019; 9:cells9010090. [PMID: 31905853 PMCID: PMC7017129 DOI: 10.3390/cells9010090] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 11/16/2019] [Revised: 12/27/2019] [Accepted: 12/28/2019] [Indexed: 12/19/2022] Open
Abstract
In most cancers, cellular origin and the contribution of intrinsic and extrinsic factors toward transformation remain elusive. Cell specific carcinogenesis models are currently unavailable. To investigate cellular origin in carcinogenesis, we developed a tumorigenesis model based on a combination of carcinogenesis and genetically engineered mouse models. We show in organoids that treatment of any of three carcinogens, DMBA, MNU, or PhIP, with protein phosphatase 2A (PP2A) knockout induced tumorigenesis in Lgr5+ intestinal lineage, but not in differentiated cells. These transformed cells increased in stem cell signature, were upregulated in EMT markers, and acquired tumorigenecity. A mechanistic approach demonstrated that tumorigenesis was dependent on Wnt, PI3K, and RAS-MAPK activation. In vivo combination with carcinogen and PP2A depletion also led to tumor formation. Using whole-exome sequencing, we demonstrate that these intestinal tumors display mutation landscape and core driver pathways resembling human intestinal tumor in The Cancer Genome Atlas (TCGA). These data provide a basis for understanding the interplay between extrinsic carcinogen and intrinsic genetic modification and suggest that PP2A functions as a tumor suppressor in intestine carcinogenesis.
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Affiliation(s)
- Yu-Ting Yen
- Drug Development Center, Institute of New Drug Development, China Medical University, Taichung 40402, Taiwan; (Y.-T.Y.); (M.C.)
- Integrative Stem Cell Center, China Medical University Hospital, Taichung 40402, Taiwan; (Y.-C.L.); (C.-M.C.)
| | - May Chien
- Drug Development Center, Institute of New Drug Development, China Medical University, Taichung 40402, Taiwan; (Y.-T.Y.); (M.C.)
- Integrative Stem Cell Center, China Medical University Hospital, Taichung 40402, Taiwan; (Y.-C.L.); (C.-M.C.)
| | - Yung-Chih Lai
- Integrative Stem Cell Center, China Medical University Hospital, Taichung 40402, Taiwan; (Y.-C.L.); (C.-M.C.)
| | - Dao-Peng Chen
- Kim Forest Enterprise Co., Ltd., Taipei 22175, Taiwan;
| | - Cheng-Ming Chuong
- Integrative Stem Cell Center, China Medical University Hospital, Taichung 40402, Taiwan; (Y.-C.L.); (C.-M.C.)
- Department of Pathology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Mien-Chie Hung
- Center for Molecular Medicine and Graduate Institute of Cancer Biology, China Medical University, Taichung 40402, Taiwan;
- Cancer Biology Program, The University of Texas Graduate School of Biomedical Sciences, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Shih-Chieh Hung
- Drug Development Center, Institute of New Drug Development, China Medical University, Taichung 40402, Taiwan; (Y.-T.Y.); (M.C.)
- Integrative Stem Cell Center, China Medical University Hospital, Taichung 40402, Taiwan; (Y.-C.L.); (C.-M.C.)
- Department of Orthopaedics, China Medical University Hospital, Taichung 40402, Taiwan
- Correspondence:
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Lin PH, Shih CK, Yen YT, Chiang W, Hsia SM. Adlay ( Coix lachryma-jobi L. var. ma-yuen Stapf.) Hull Extract and Active Compounds Inhibit Proliferation of Primary Human Leiomyoma Cells and Protect against Sexual Hormone-Induced Mice Smooth Muscle Hyperproliferation. Molecules 2019; 24:molecules24081556. [PMID: 31010220 PMCID: PMC6514562 DOI: 10.3390/molecules24081556] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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: 03/21/2019] [Revised: 04/13/2019] [Accepted: 04/18/2019] [Indexed: 01/09/2023] Open
Abstract
Uterine leiomyomas, also known as fibroids, are benign neoplasms of the uterus and have a high incidence rate in women of reproductive age. Hysterectomy or myomectomy is the initial treatment, but fibroids will recur if the patient is still exposed to similar risk factors. Therefore, developing new therapeutic strategies are urgently necessary. In this study, the anti-proliferation effects of each fraction of adlay seeds were evaluated in uterine leiomyomas, and we identified the potential phytochemical compounds. We found that the ethyl acetate fraction of adlay hull (AHE-ea) appeared to be highly efficient in the anti-proliferation of rat uterine leiomyoma ELT3 cells and primary human uterine leiomyoma (hUL) cells. The proliferation of primary human normal uterine smooth muscle (UtSMC) and normal uterine myometrial (hUM) cells were also suppressed by AHE-ea. Two phytosterols, stigmasterol and β-sitosterol, were identified from AHE-ea fraction. Mice treated with AHE-ea and stigmasterol alone demonstrated reduced diethylstilbestrol/medroxyprogesterone 17-acetate (DES/MPA)-induced uterine myometrial hyperplasia, which is the critical step for the development of leiomyoma. Taken together, our results suggest that the AHE-ea fraction could be considered as a natural plant-based medicine in the prevention or treatment of uterine leiomyoma growth.
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Affiliation(s)
- Po-Han Lin
- School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, Taipei 11031, Taiwan.
| | - Chun-Kuang Shih
- School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, Taipei 11031, Taiwan.
| | - Yu-Ting Yen
- Institute of Food Science and Technology, National Taiwan University, Taipei 10617, Taiwan.
| | - Wenchang Chiang
- Institute of Food Science and Technology, National Taiwan University, Taipei 10617, Taiwan.
| | - Shih-Min Hsia
- School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, Taipei 11031, Taiwan.
- Graduate Institute of Metabolism and Obesity Sciences, College of Nutrition, Taipei Medical University, Taipei 11031, Taiwan.
- School of Food Safety, College of Nutrition, Taipei Medical University, Taipei 11031, Taiwan.
- Nutrition Research Center, Taipei Medical University Hospital, Taipei 11031, Taiwan.
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Tang SY, Medina H, Yen YT, Chen CW, Yang TY, Wei KH, Chueh YL. Enhanced Photocarrier Generation with Selectable Wavelengths by M-Decorated-CuInS 2 Nanocrystals (M = Au and Pt) Synthesized in a Single Surfactant Process on MoS 2 Bilayers. Small 2019; 15:e1803529. [PMID: 30663255 DOI: 10.1002/smll.201803529] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 11/13/2018] [Indexed: 05/10/2023]
Abstract
A facile approach for the synthesis of Au- and Pt-decorated CuInS2 nanocrystals (CIS NCs) as sensitizer materials on the top of MoS2 bilayers is demonstrated. A single surfactant (oleylamine) is used to prepare such heterostructured noble metal decorated CIS NCs from the pristine CIS. Such a feasible way to synthesize heterostructured noble metal decorated CIS NCs from the single surfactant can stimulate the development of the functionalized heterostructured NCs in large scale for practical applications such as solar cells and photodetectors. Photodetectors based on MoS2 bilayers with the synthesized nanocrystals display enhanced photocurrent, almost 20-40 times higher responsivity and the On/Off ratio is enlarged one order of magnitude compared with the pristine MoS2 bilayers-based photodetectors. Remarkably, by using Pt- or Au-decorated CIS NCs, the photocurrent enhancement of MoS2 photodetectors can be tuned between blue (405 nm) to green (532 nm). The strategy described here acts as a perspective to significantly improve the performance of MoS2 -based photodetectors with the controllable absorption wavelengths in the visible light range, showing the feasibility of the possible color detection.
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Affiliation(s)
- Shin-Yi Tang
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan, ROC
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 30013, Taiwan, ROC
| | - Henry Medina
- Department of Electronic Materials, Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), Singapore, 138634, Singapore
| | - Yu-Ting Yen
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan, ROC
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 30013, Taiwan, ROC
| | - Chia-Wei Chen
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan, ROC
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 30013, Taiwan, ROC
| | - Tzu-Yi Yang
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan, ROC
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 30013, Taiwan, ROC
| | - Kung-Hwa Wei
- Department of Materials Science and Engineering, National Chiao Tung University, 30010, Hsinchu, Taiwan, ROC
- Center for Emergent Functional Matter Science, National Chiao Tung University, 30010, Hsinchu, Taiwan, ROC
| | - Yu-Lun Chueh
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan, ROC
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 30013, Taiwan, ROC
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10
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Yen YT, Ho SW, Liu YC, Yen CB. Blunt Traumatic Cardiac Rupture Presenting as Massive Haemothorax. HONG KONG J EMERG ME 2017. [DOI: 10.1177/102490791502200510] [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: 11/15/2022] Open
Abstract
Cardiac rupture following blunt thoracic trauma in motor vehicle crash generally causes death at scene, and is rarely diagnosed preoperatively. However, early emergency thoracotomy in the emergency department (ED) or operating room might reduce the mortality but the benefit is still controversial. A haemodynamically unstable 28-year-old woman following motor vehicle crash was detected to have right haemothorax on chest X-ray. Thoracic computed tomography (CT) revealed additional lung contusions and multiple bone fractures. She developed cardiac arrest during open thoracotomy and had restored spontaneous circulation after open-chest cardiopulmonary resuscitation (CPR). This report highlights that CT scan in haemodynamically unstable patients could delay surgical control of the injury. Open-chest CPR can be life-saving for blunt chest injury developing cardiac arrest. (Hong Kong j.emerg.med. 2015;22:320-323)
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Affiliation(s)
- YT Yen
- Chung Shan Medical University, School of Dentistry; and Chung Shan Medical University Hospital, Department of Dentistry, Taichung, Taiwan
| | - SW Ho
- Chung Shan Medical University, Department of Emergency Medicine, Taichung, Taiwan
| | - YC Liu
- Chung Shan Medical University, School of Medicine, Taichung, Taiwan
| | - CB Yen
- Chung Shan Medical University, School of Medicine, Taichung, Taiwan
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11
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Huang CC, Medina H, Chen YZ, Su TY, Li JG, Chen CW, Yen YT, Wang ZM, Chueh YL. Transfer-Free Growth of Atomically Thin Transition Metal Disulfides Using a Solution Precursor by a Laser Irradiation Process and Their Application in Low-Power Photodetectors. Nano Lett 2016; 16:2463-2470. [PMID: 26906714 DOI: 10.1021/acs.nanolett.6b00033] [Citation(s) in RCA: 2] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Although chemical vapor deposition is the most common method to synthesize transition metal dichalcogenides (TMDs), several obstacles, such as the high annealing temperature restricting the substrates used in the process and the required transfer causing the formation of wrinkles and defects, must be resolved. Here, we present a novel method to grow patternable two-dimensional (2D) transition metal disulfides (MS2) directly underneath a protective coating layer by spin-coating a liquid chalcogen precursor onto the transition metal oxide layer, followed by a laser irradiation annealing process. Two metal sulfides, molybdenum disulfide (MoS2) and tungsten disulfide (WS2), are investigated in this work. Material characterization reveals the diffusion of sulfur into the oxide layer prior to the formation of the MS2. By controlling the sulfur diffusion, we are able to synthesize continuous MS2 layers beneath the top oxide layer, creating a protective coating layer for the newly formed TMD. Air-stable and low-power photosensing devices fabricated on the synthesized 2D WS2 without the need for a further transfer process demonstrate the potential applicability of TMDs generated via a laser irradiation process.
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Affiliation(s)
- Chi-Chih Huang
- Department of Materials Science and Engineering, National Tsing Hua University , No. 101, Section 2, Kuang-Fu Road, Hsinchu, Taiwan
| | - Henry Medina
- Department of Materials Science and Engineering, National Tsing Hua University , No. 101, Section 2, Kuang-Fu Road, Hsinchu, Taiwan
| | - Yu-Ze Chen
- Department of Materials Science and Engineering, National Tsing Hua University , No. 101, Section 2, Kuang-Fu Road, Hsinchu, Taiwan
| | - Teng-Yu Su
- Department of Materials Science and Engineering, National Tsing Hua University , No. 101, Section 2, Kuang-Fu Road, Hsinchu, Taiwan
| | - Jian-Guang Li
- Department of Materials Science and Engineering, National Tsing Hua University , No. 101, Section 2, Kuang-Fu Road, Hsinchu, Taiwan
| | - Chia-Wei Chen
- Department of Materials Science and Engineering, National Tsing Hua University , No. 101, Section 2, Kuang-Fu Road, Hsinchu, Taiwan
| | - Yu-Ting Yen
- Department of Materials Science and Engineering, National Tsing Hua University , No. 101, Section 2, Kuang-Fu Road, Hsinchu, Taiwan
| | - Zhiming M Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China , Chengdu, People's Republic of China
| | - Yu-Lun Chueh
- Department of Materials Science and Engineering, National Tsing Hua University , No. 101, Section 2, Kuang-Fu Road, Hsinchu, Taiwan
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12
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Tseng KC, Yen YT, Thomas SR, Tsai HW, Hsu CH, Tsai WC, Shen CH, Shieh JM, Wang ZM, Chueh YL. A facile chemical-mechanical polishing lift-off transfer process toward large scale Cu(In,Ga)Se2 thin-film solar cells on arbitrary substrates. Nanoscale 2016; 8:5181-5188. [PMID: 26878109 DOI: 10.1039/c5nr07008b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The fabrication of Cu(In,Ga)Se2 (CIGS) solar cells on flexible substrates is a non-trivial task due to thermal and ion diffusion related issues. In order to circumvent these issues, we have developed a chemical-mechanical polishing lift-off (CMPL) transfer process, enabling the direct transfer of CIGS solar cells from conventional soda-lime glass (SLG) onto arbitrary flexible substrates up to 4 cm(2) in size. The structural and compositional nature of the pre- and post-transferred films is examined using electron microscopy, X-ray diffraction analysis, Raman and photoluminescence spectroscopy. We demonstrate the fabrication of solar cells on a range of flexible substrates while being able to maintain 75% cell efficiency (η) when compared to pre-transferred solar cells. The results obtained in this work suggest that our transfer process offers a highly promising approach toward large scale fabrication of CIGS-based solar cells on a wide variety of flexible substrates, suitable for use in the large scale CIGS photovoltaic industry.
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Affiliation(s)
- Kuan-Chun Tseng
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan, Republic of China.
| | - Yu-Ting Yen
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan, Republic of China.
| | - Stuart R Thomas
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, People's Republic of China and Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan, Republic of China.
| | - Hung-Wei Tsai
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan, Republic of China.
| | - Cheng-Hung Hsu
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan, Republic of China.
| | - Wen-Chi Tsai
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan, Republic of China.
| | - Chang-Hong Shen
- National Nano Device Laboratories, No. 26, Prosperity Road 1, Hsinchu 30078, Taiwan, Republic of China
| | - Jia-Min Shieh
- National Nano Device Laboratories, No. 26, Prosperity Road 1, Hsinchu 30078, Taiwan, Republic of China
| | - Zhiming M Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, People's Republic of China
| | - Yu-Lun Chueh
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan, Republic of China.
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13
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Lu TY, Lee YC, Yen YT, Yu CC, Chen HL. Astronomical liquid mirrors as highly ultrasensitive, broadband-operational surface-enhanced Raman scattering-active substrates. J Colloid Interface Sci 2016; 466:80-90. [DOI: 10.1016/j.jcis.2015.12.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Revised: 10/26/2015] [Accepted: 12/07/2015] [Indexed: 11/30/2022]
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14
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Tsai HW, Thomas SR, Chen CW, Wang YC, Tsai HS, Yen YT, Hsu CH, Tsai WC, Wang ZM, Chueh YL. Enhanced Conversion Efficiency of Cu(In,Ga)Se2 Solar Cells via Electrochemical Passivation Treatment. ACS Appl Mater Interfaces 2016; 8:7777-7782. [PMID: 26815164 DOI: 10.1021/acsami.5b11863] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Defect control in Cu(In,Ga)Se2 (CIGS) materials, no matter what the defect type or density, is a significant issue, correlating directly to PV performance. These defects act as recombination centers and can be briefly categorized into interface recombination and Shockley-Read-Hall (SRH) recombination, both of which can lead to reduced PV performance. Here, we introduce an electrochemical passivation treatment for CIGS films that can lower the oxygen concentration at the CIGS surface as observed by X-ray photoelectron spectrometer analysis. Temperature-dependent J-V characteristics of CIGS solar cells reveal that interface recombination is suppressed and an improved rollover condition can be achieved following our electrochemical treatment. As a result, the surface defects are passivated, and the power conversion efficiency performance of the solar cell devices can be enhanced from 4.73 to 7.75%.
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Affiliation(s)
- Hung-Wei Tsai
- Department of Materials Science and Engineering, National Tsing Hua University , Hsinchu 30013, Taiwan
| | - Stuart R Thomas
- Department of Materials Science and Engineering, National Tsing Hua University , Hsinchu 30013, Taiwan
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China , Chengdu, Sichuan 610051, PR China
| | - Chia-Wei Chen
- Department of Materials Science and Engineering, National Tsing Hua University , Hsinchu 30013, Taiwan
| | - Yi-Chung Wang
- Department of Materials Science and Engineering, National Tsing Hua University , Hsinchu 30013, Taiwan
| | - Hsu-Sheng Tsai
- Department of Materials Science and Engineering, National Tsing Hua University , Hsinchu 30013, Taiwan
| | - Yu-Ting Yen
- Department of Materials Science and Engineering, National Tsing Hua University , Hsinchu 30013, Taiwan
| | - Cheng-Hung Hsu
- Department of Materials Science and Engineering, National Tsing Hua University , Hsinchu 30013, Taiwan
| | - Wen-Chi Tsai
- Department of Materials Science and Engineering, National Tsing Hua University , Hsinchu 30013, Taiwan
| | - Zhiming M Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China , Chengdu, Sichuan 610051, PR China
| | - Yu-Lun Chueh
- Department of Materials Science and Engineering, National Tsing Hua University , Hsinchu 30013, Taiwan
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15
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Yu CC, Lin KT, Su PY, Wang EY, Yen YT, Chen HL. Short-range plasmonic nanofocusing within submicron regimes facilitates in situ probing and promoting of interfacial reactions. Nanoscale 2016; 8:3647-3659. [PMID: 26809318 DOI: 10.1039/c5nr06555k] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In this study, a simple configuration, based on high-index dielectric nanoparticles (NPs) and plasmonic nanostructures, is employed for the nanofocusing of submicron-short-range surface plasmon polaritons (SPPs). The excited SPPs are locally bound and focused at the interface between the dielectric NPs and the underlying metallic nanostructures, thereby greatly enhancing the local electromagnetic field. Taking advantage of the surface properties of the dielectric NPs, this system performs various functions. For example, the nanofocusing of submicron-short-range SPPs is used to enhance the Raman signals of gas molecules adsorbed on the dielectric NPs. In addition, the presence of the local strong electromagnetic field accelerates the rates of interfacial reactions on the surfaces of the dielectric NPs. Therefore, the proposed nanofocusing configuration can both promote and probe interfacial reactions simultaneously. Herein, the promotion and probing of the desorption of EtOH vapor are described, as well as the photodegradation of methylene blue. Moreover, the nanofocusing of SPPs is demonstrated on an aluminum surface in both the visible and UV regimes, a process that has not been achieved using conventional tapered waveguide nanofocusing structures. Therefore, the nanofocusing of submicron-short-range SPPs by dielectric NPs on plasmonic nanostructures is not limited to low-loss noble metals. Accordingly, this system has potential for use in light management and on-chip green devices and sensors.
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Affiliation(s)
- Chen-Chieh Yu
- Department of Materials Science and Engineering, National Taiwan University, Taipei, Taiwan.
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16
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Chou SY, Yu CC, Yen YT, Lin KT, Chen HL, Su WF. Romantic Story or Raman Scattering? Rose Petals as Ecofriendly, Low-Cost Substrates for Ultrasensitive Surface-Enhanced Raman Scattering. Anal Chem 2015; 87:6017-24. [DOI: 10.1021/acs.analchem.5b00551] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Sin-Yi Chou
- Department of Materials Science
and Engineering, National Taiwan University, Number 1, Section 4, Roosevelt Road, Taipei, 10617 Taiwan (R.O.C.)
| | - Chen-Chieh Yu
- Department of Materials Science
and Engineering, National Taiwan University, Number 1, Section 4, Roosevelt Road, Taipei, 10617 Taiwan (R.O.C.)
| | - Yu-Ting Yen
- Department of Materials Science
and Engineering, National Taiwan University, Number 1, Section 4, Roosevelt Road, Taipei, 10617 Taiwan (R.O.C.)
| | - Keng-Te Lin
- Department of Materials Science
and Engineering, National Taiwan University, Number 1, Section 4, Roosevelt Road, Taipei, 10617 Taiwan (R.O.C.)
| | - Hsuen-Li Chen
- Department of Materials Science
and Engineering, National Taiwan University, Number 1, Section 4, Roosevelt Road, Taipei, 10617 Taiwan (R.O.C.)
| | - Wei-Fang Su
- Department of Materials Science
and Engineering, National Taiwan University, Number 1, Section 4, Roosevelt Road, Taipei, 10617 Taiwan (R.O.C.)
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17
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Wang YC, Cheng HY, Yen YT, Wu TT, Hsu CH, Tsai HW, Shen CH, Shieh JM, Chueh YL. Large-scale micro- and nanopatterns of Cu(In,Ga)Se2 thin film solar cells by mold-assisted chemical-etching process. ACS Nano 2015; 9:3907-3916. [PMID: 25769317 DOI: 10.1021/acsnano.5b00701] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A reactive mold-assisted chemical etching (MACE) process through an easy-to-make agarose stamp soaked in bromine methanol etchant to rapidly imprint larger area micro- and nanoarrays on CIGS substrates was demonstrated. Interestingly, by using the agarose stamp during the MACE process with and without additive containing oil and triton, CIGS microdome and microhole arrays can be formed on the CIGS substrate. Detailed formation mechanisms of microstructures and the chemical composition variation after the etching process were investigated. In addition, various microand nanostructures were also demonstrated by this universal approach. The microstructure arrays integrated into standard CIGS solar cells with thinner thickness can still achieve an efficiency of 11.22%, yielding an enhanced efficiency of ∼18% compared with that of their planar counterpart due to an excellent absorption behavior confirmed by the simulation results, which opens up a promising way for the realization of high-efficiency micro- or nanostructured thin-film solar cells. Finally, the complete dissolution of agarose stamp into hot water demonstrates an environmentally friendly method by the mold-assisted chemical etching process through an easy-to-make agarose stamp.
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Affiliation(s)
- Yi-Chung Wang
- †Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013 Taiwan
| | - Hsiang-Ying Cheng
- †Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013 Taiwan
| | - Yu-Ting Yen
- †Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013 Taiwan
| | - Tsung-Ta Wu
- †Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013 Taiwan
- ‡National Nano Device Laboratories, No. 26, Prosperity Road 1, Hsinchu 30078, Taiwan
| | - Cheng-Hung Hsu
- †Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013 Taiwan
| | - Hung-Wei Tsai
- †Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013 Taiwan
| | - Chang-Hong Shen
- ‡National Nano Device Laboratories, No. 26, Prosperity Road 1, Hsinchu 30078, Taiwan
| | - Jia-Min Shieh
- ‡National Nano Device Laboratories, No. 26, Prosperity Road 1, Hsinchu 30078, Taiwan
| | - Yu-Lun Chueh
- †Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013 Taiwan
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18
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Yu CC, Tseng YC, Su PY, Lin KT, Shao CC, Chou SY, Yen YT, Chen HL. Incident angle-tuned, broadband, ultrahigh-sensitivity plasmonic antennas prepared from nanoparticles on imprinted mirrors. Nanoscale 2015; 7:3985-3996. [PMID: 25567353 DOI: 10.1039/c4nr05902f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We have used a direct imprint-in-metal method that is cheap and rapid to prepare incident angle-tuned, broadband, ultrahigh-sensitivity plasmonic antennas from nanoparticles (NPs) and imprinted metal mirrors. By changing the angle of incidence, the nanoparticle-imprinted mirror antennas (NIMAs) exhibited broadband electromagnetic enhancement from the visible to the near-infrared (NIR) regime, making them suitable for use as surface-enhanced Raman scattering (SERS)-active substrates. Unlike other SERS-active substrates that feature various structures with different periods or morphologies, the NIMAs achieved broadband electromagnetic enhancement from single configurations. The enhancement of the electric field intensity in the NIMAs originated from coupling between the localized surface plasmon resonance of the NPs and the periodic structure-excited surface plasmon resonance (SPR) of the imprinted mirror. Moreover, the coupling wavelengths could be modulated because the SPR wavelength was readily tuned by changing the angle of the incident light. Herein, we demonstrate that such NIMAs are robust substrates for visible and NIR surface-enhanced resonance Raman scattering under multiple laser lines (532, 633, and 785 nm) of excitation. In addition, we have found that NIMAs are ultrasensitive SERS-active substrates that can detect analytes (e.g., rhodamine 6G) at concentrations as low as 10(-15) M.
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Affiliation(s)
- Chen-Chieh Yu
- Department of Materials Science and Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, 10617 Taiwan (R.O.C.).
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19
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Yu CC, Chou SY, Tseng YC, Tseng SC, Yen YT, Chen HL. Single-shot laser treatment provides quasi-three-dimensional paper-based substrates for SERS with attomolar sensitivity. Nanoscale 2015; 7:1667-1677. [PMID: 25369861 DOI: 10.1039/c4nr05178e] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this study, an eco-friendly and ultrasensitive paper substrate is developed for surface-enhanced Raman scattering (SERS) with performance approaching single molecule detection. By exploiting the laser-induced photothermal effect, paper fibrils with hybrid micro- and nanostructures can facilitate the formation of highly dense metal nanoparticles (NPs) after a single shot of laser illumination. Metal films deposited on the paper substrates feature discontinuous morphologies, with the fragments acting as multiple nucleation sites. Because thermal conductivity is low on the broken films and the underlying paper fibrils, the incident energy is absorbed efficiently. Moreover, the quasi-three-dimensional distribution of NPs on the SERS paper greatly enhances the SERS signals within the effective collection volume of a Raman microscope. As a result of the large number of highly effective hot spots and the condensation effect, the hydrophobic SERS paper provides SERS signals with stable and uniform reproducibility throughout the detection area. The limits of detection when using the paper substrates reach the attomolar (10(-18) M) level, thereby approaching single molecule detection.
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Affiliation(s)
- Chen-Chieh Yu
- Department of Materials Science and Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, 10617 Taiwan (R.O.C.).
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20
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Chen SC, Chen YJ, Chen WT, Yen YT, Kao TS, Chuang TY, Liao YK, Wu KH, Yabushita A, Hsieh TP, Charlton MDB, Tsai DP, Kuo HC, Chueh YL. Toward omnidirectional light absorption by plasmonic effect for high-efficiency flexible nonvacuum Cu(In,Ga)Se2 thin film solar cells. ACS Nano 2014; 8:9341-9348. [PMID: 25093682 DOI: 10.1021/nn503320m] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We have successfully demonstrated a great advantage of plasmonic Au nanoparticles for efficient enhancement of Cu(In,Ga)Se2(CIGS) flexible photovoltaic devices. The incorporation of Au NPs can eliminate obstacles in the way of developing ink-printing CIGS flexible thin film photovoltaics (TFPV), such as poor absorption at wavelengths in the high intensity region of solar spectrum, and that occurs significantly at large incident angle of solar irradiation. The enhancement of external quantum efficiency and photocurrent have been systematically analyzed via the calculated electromagnetic field distribution. Finally, the major benefits of the localized surface plasmon resonances (LSPR) in visible wavelength have been investigated by ultrabroadband pump-probe spectroscopy, providing a solid evidence on the strong absorption and reduction of surface recombination that increases electron-hole generation and improves the carrier transportation in the vicinity of pn-juction.
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Affiliation(s)
- Shih-Chen Chen
- Department of Photonics and Institute of Electro-Optical Engineering and ‡Department of Electrophysics, National Chiao-Tung University , Hsinchu 30010, Taiwan
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21
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Lin JC, Lin SC, Chen WY, Yen YT, Lai CW, Tao MH, Lin YL, Miaw SC, Wu-Hsieh BA. Dengue viral protease interaction with NF-κB inhibitor α/β results in endothelial cell apoptosis and hemorrhage development. J Immunol 2014; 193:1258-67. [PMID: 24973451 DOI: 10.4049/jimmunol.1302675] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Hemorrhagic manifestations occur frequently accompanying a wide range of dengue disease syndromes. Much work has focused on the contribution of immune factors to the pathogenesis of hemorrhage, but how dengue virus (DENV) participates in the pathogenic process has never been explored. Although there is no consensus that apoptosis is the basis of vascular permeability in human dengue infections, we showed in dengue hemorrhage mouse model that endothelial cell apoptosis is important to hemorrhage development in mice. To explore the molecular basis of the contribution of DENV to endothelial cell death, we show in this study that DENV protease interacts with cellular IκBα and IκBβ and cleaves them. By inducing IκBα and IκBβ cleavage and IκB kinase activation, DENV protease activates NF-κB, which results in endothelial cell death. Intradermal inoculation of DENV protease packaged in adenovirus-associated virus-9 induces endothelial cell death and dermal hemorrhage in mice. Although the H51 activity site is not involved in the interaction between DENV protease and IκB-α/β, the enzymatic activity is critical to the ability of DENV protease to induce IκBα and IκBβ cleavage and trigger hemorrhage development. Moreover, overexpression of IκBα or IκBβ protects endothelial cells from DENV-induced apoptosis. In this study, we show that DENV protease participates in the pathogenesis of dengue hemorrhage and discover IκBα and IκBβ to be the new cellular targets that are cleaved by DENV protease.
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Affiliation(s)
- Jung-Chen Lin
- Graduate Institute of Immunology, National Taiwan University College of Medicine, Taipei 100, Taiwan
| | - Shih-Ching Lin
- Graduate Institute of Immunology, National Taiwan University College of Medicine, Taipei 100, Taiwan
| | - Wen-Yu Chen
- Graduate Institute of Immunology, National Taiwan University College of Medicine, Taipei 100, Taiwan
| | - Yu-Ting Yen
- Graduate Institute of Immunology, National Taiwan University College of Medicine, Taipei 100, Taiwan
| | - Chin-Wen Lai
- Department of Clinical Laboratory Sciences and Medical Biotechnology, College of Medicine, National Taiwan University, Taipei 100, Taiwan; and Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan
| | - Mi-Hua Tao
- Department of Clinical Laboratory Sciences and Medical Biotechnology, College of Medicine, National Taiwan University, Taipei 100, Taiwan; and Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan
| | - Yi-Ling Lin
- Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan
| | - Shi-Chuen Miaw
- Graduate Institute of Immunology, National Taiwan University College of Medicine, Taipei 100, Taiwan
| | - Betty A Wu-Hsieh
- Graduate Institute of Immunology, National Taiwan University College of Medicine, Taipei 100, Taiwan;
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22
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Yen YT, Wang YC, Chen YZ, Tsai HW, Hu F, Lin SM, Chen YJ, Lai CC, Liu W, Wang TH, Hong HF, Chueh YL. Large scale and orientation-controllable nanotip structures on CuInS₂, Cu(In,Ga)S₂, CuInSe₂, and Cu(In,Ga)Se₂ by low energy ion beam bombardment process: growth and characterization. ACS Appl Mater Interfaces 2014; 6:8327-8336. [PMID: 24803028 DOI: 10.1021/am501161j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
One-step facile methodology to create nanotip arrays on chalcopyrite materials (such as CuInS2, Cu(In,Ga)S2, CuInSe2, and Cu(In,Ga)Se2) via a low energy ion beam bombardment process has been demonstrated. The mechanism of formation for nanotip arrays has been proposed by sputtering yields of metals and reduction of metals induced by the ion beam bombardment process. The optical reflectance of these chalcopyrite nanotip arrays has been characterized by UV-vis spectrophotometer and the efficient light-trapping effect has been observed. Large scale (∼4'') and high density (10(10) tips/cm(2)) of chalcopyrite nanotip arrays have been obtained by using low ion energy (< 1 kV), short processing duration (< 30 min), and template-free. Besides, orientation and length of these chalcopyrite nanotip arrays are controllable. Our results can be the guide for other nanostructured materials fabrication by ion sputtering and are available for industrial production as well.
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Affiliation(s)
- Yu-Ting Yen
- Department of Materials Science and Engineering, National Tsing Hua University , Hsinchu City 30013, Taiwan
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23
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Wu TT, Hu F, Huang JH, Chang CH, Lai CC, Yen YT, Huang HY, Hong HF, Wang ZM, Shen CH, Shieh JM, Chueh YL. Improved efficiency of a large-area Cu(In,Ga)Se₂ solar cell by a nontoxic hydrogen-assisted solid Se vapor selenization process. ACS Appl Mater Interfaces 2014; 6:4842-4849. [PMID: 24571825 DOI: 10.1021/am405780z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A nontoxic hydrogen-assisted solid Se vapor selenization process (HASVS) technique to achieve a large-area (40 × 30 cm(2)) Cu(In,Ga)Se2 (CIGS) solar panel with enhanced efficiencies from 7.1 to 10.8% (12.0% for active area) was demonstrated. The remarkable improvement of efficiency and fill factor comes from improved open circuit voltage (Voc) and reduced dark current due to (1) decreased interface recombination raised from the formation of a widened buried homojunction with n-type Cd(Cu) participation and (2) enhanced separation of electron and hole carriers resulting from the accumulation of Na atoms on the surface of the CIGS film. The effects of microstructural, compositional, and electrical characteristics with hydrogen-assisted Se vapor selenization, including interdiffusion of atoms and formation of buried homojunction, were examined in detail. This methodology can be also applied to CIS (CuInSe2) thin film solar cells with enhanced efficiencies from 5.3% to 8.5% (9.4% for active area) and provides a facile approach to improve quality of CIGS and stimulate the nontoxic progress in the large scale CIGS PV industry.
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Affiliation(s)
- Tsung-Ta Wu
- Department of Materials Science and Engineering, National Tsing-Hua University , Hsinchu 30013, Taiwan
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Yen YT, Lu TY, Lee YC, Yu CC, Tsai YC, Tseng YC, Chen HL. Highly reflective liquid mirrors: exploring the effects of localized surface plasmon resonance and the arrangement of nanoparticles on metal liquid-like films. ACS Appl Mater Interfaces 2014; 6:4292-4300. [PMID: 24620856 DOI: 10.1021/am406048s] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this paper, we describe a high-reflectance liquid mirror prepared from densely packed silver nanoparticles (AgNPs) of two different sizes. We controlled the particle size during the synthetic process by controlling the temperature. Varying the concentration of the ligand also allowed us to optimize the arrangement of the AgNPs to achieve liquid mirrors exhibiting high specular reflectance. Scanning electron microscopy and atomic force microscopy confirmed that the particles of the liquid mirror were well-packed with an interparticle distance of merely 2 nm; thus, the interstices and surface roughness of the NPs were effectively minimized. As a result of decreased scattering loss, the reflectance in the shorter wavelength regime was increased effectively. The AgNP film was also sufficiently thick to reflect the light in the longer wavelength regime. In addition, we used three-dimensional finite-difference time domain simulations and experimental measurements to investigate the relationship between the localized surface plasmon resonance (LSPR) and the specular reflection of the liquid mirrors. By changing the packing density of the AgNPs, we found that the LSPR effect could yield either a specular reflection peak or dip at the LSPR wavelengths in the reflection spectra of the liquid mirrors. Relative to previously reported liquid mirrors, the reflectance of our system is obviously much greater, especially in the shorter wavelength regime. The average reflectance in the range from 400 to 1000 nm could reach 77%, comparable with that of mercury-based liquid mirrors.
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Affiliation(s)
- Yu-Ting Yen
- Department of Materials Science and Engineering, National Taiwan University , No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
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Wan SW, Lu YT, Huang CH, Lin CF, Anderson R, Liu HS, Yeh TM, Yen YT, Wu-Hsieh BA, Lin YS. Protection against dengue virus infection in mice by administration of antibodies against modified nonstructural protein 1. PLoS One 2014; 9:e92495. [PMID: 24658118 PMCID: PMC3962419 DOI: 10.1371/journal.pone.0092495] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Accepted: 02/21/2014] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Infection with dengue virus (DENV) may cause life-threatening disease with thrombocytopenia and vascular leakage which are related to dysfunction of platelets and endothelial cells. We previously showed that antibodies (Abs) against DENV nonstructural protein 1 (NS1) cross-react with human platelets and endothelial cells, leading to functional disturbances. Based on sequence homology analysis, the C-terminal region of DENV NS1 protein contains cross-reactive epitopes. For safety in vaccine development, the cross-reactive epitopes of DENV NS1 protein should be deleted or modified. METHODOLOGY/PRINCIPAL FINDINGS We tested the protective effects of Abs against full-length DENV NS1, NS1 lacking the C-terminal amino acids (a.a.) 271-352 (designated ΔC NS1), and chimeric DJ NS1 consisting of N-terminal DENV NS1 (a.a. 1-270) and C-terminal Japanese encephalitis virus NS1 (a.a. 271-352). The anti-ΔC NS1 and anti-DJ NS1 Abs showed a lower binding activity to endothelial cells and platelets than that of anti-DENV NS1 Abs. Passive immunization with anti-ΔC NS1 and anti-DJ NS1 Abs reduced DENV-induced prolonged mouse tail bleeding time. Treatment with anti-DENV NS1, anti-ΔC NS1 and anti-DJ NS1 Abs reduced local skin hemorrhage, controlled the viral load of DENV infection in vivo, synergized with complement to inhibit viral replication in vitro, as well as abolished DENV-induced macrophage infiltration to the site of skin inoculation. Moreover, active immunization with modified NS1 protein, but not with unmodified DENV NS1 protein, reduced DENV-induced prolonged bleeding time, local skin hemorrhage, and viral load. CONCLUSIONS/SIGNIFICANCE These results support the idea that modified NS1 proteins may represent an improved strategy for safe and effective vaccine development against DENV infection.
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Affiliation(s)
- Shu-Wen Wan
- Center of Infectious Disease and Signaling Research, National Cheng Kung University, Tainan, Taiwan
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yi-Tien Lu
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Chia-Hui Huang
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Chiou-Feng Lin
- Center of Infectious Disease and Signaling Research, National Cheng Kung University, Tainan, Taiwan
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Robert Anderson
- Department of Microbiology and Immunology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Hsiao-Sheng Liu
- Center of Infectious Disease and Signaling Research, National Cheng Kung University, Tainan, Taiwan
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Trai-Ming Yeh
- Center of Infectious Disease and Signaling Research, National Cheng Kung University, Tainan, Taiwan
- Department of Medical Laboratory Science and Biotechnology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yu-Ting Yen
- Graduate Institute of Immunology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Betty A. Wu-Hsieh
- Graduate Institute of Immunology, College of Medicine, National Taiwan University, Taipei, Taiwan
- * E-mail: (BAWH); (YSL)
| | - Yee-Shin Lin
- Center of Infectious Disease and Signaling Research, National Cheng Kung University, Tainan, Taiwan
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- * E-mail: (BAWH); (YSL)
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Han N, Hou JJ, Wang F, Yip S, Yen YT, Yang ZX, Dong G, Hung T, Chueh YL, Ho JC. GaAs nanowires: from manipulation of defect formation to controllable electronic transport properties. ACS Nano 2013; 7:9138-46. [PMID: 24016352 DOI: 10.1021/nn403767j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Reliable control in the crystal quality of synthesized III-V nanowires (NWs) is particularly important to manipulate their corresponding electronic transport properties for technological applications. In this report, a "two-step" growth process is adopted to achieve single-crystalline GaAs NWs, where an initial high-temperature nucleation process is employed to ensure the formation of high Ga supersaturated Au7Ga3 and Au2Ga alloy seeds, instead of the low Ga supersaturated Au7Ga2 seeds observed in the conventional "single-step" growth. These two-step NWs are long (>60 μm) and thick (>80 nm) with the minimal defect concentrations and uniform growth orientations. Importantly, these NWs exhibit p-type conductivity as compared to the single-step grown n-type NWs for the same diameter range. This NW conductivity difference (p- versus n-channel) is shown to originate from the donor-like crystal defects, such as As precipitates, induced by the low Ga supersaturated multicrystalline Au7Ga2 alloy seeds. Then the well-controlled crystal quality for desired electronic properties is further explored in the application of large-scale p-type GaAs NW parallel array FETs as well as the integration of both p- and n-type GaAs NWs into CMOS inverters. All these illustrate the successful control of NW crystal defects and corresponding electronic transport properties via the manipulation of Ga supersaturation in the catalytic alloy tips with different preparation methods. The understanding of this relationship between NW crystal quality and electronic transport properties is critical and preferential to the future development of nanoelectronic materials, circuit design, and fabrication.
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Affiliation(s)
- Ning Han
- Department of Physics and Materials Science, City University of Hong Kong , 83 Tat Chee Avenue, Kowloon, Hong Kong
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Liao YK, Wang YC, Yen YT, Chen CH, Hsieh DH, Chen SC, Lee CY, Lai CC, Kuo WC, Juang JY, Wu KH, Cheng SJ, Lai CH, Lai FI, Kuo SY, Kuo HC, Chueh YL. Non-antireflective scheme for efficiency enhancement of Cu(In,Ga)Se2 nanotip array solar cells. ACS Nano 2013; 7:7318-7329. [PMID: 23906340 DOI: 10.1021/nn402976b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We present systematic works in characterization of CIGS nanotip arrays (CIGS NTRs). CIGS NTRs are obtained by a one-step ion-milling process by a direct-sputtering process of CIGS thin films (CIGS TF) without a postselenization process. At the surface of CIGS NTRs, a region extending to 100 nm in depth with a lower copper concentration compared to that of CIGS TF has been discovered. After KCN washing, removal of secondary phases can be achieved and a layer with abundant copper vacancy (V(Cu)) was left. Such compositional changes can be a benefit for a CIGS solar cell by promoting formation of Cd-occupied Cu sites (Cd(Cu)) at the CdS/CIGS interface and creates a type-inversion layer to enhance interface passivation and carrier extraction. The raised V(Cu) concentration and enhanced Cd diffusion in CIGS NTRs have been verified by energy dispersive spectrometry. Strengthened adhesion of Al:ZnO (AZO) thin film on CIGS NTRs capped with CdS has also been observed in SEM images and can explain the suppressed series resistance of the device with CIGS NTRs. Those improvements in electrical characteristics are the main factors for efficiency enhancement rather than antireflection.
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Affiliation(s)
- Yu-Kuang Liao
- Department of Photonics and Institute of Electro-optical Engineering, National Chiao-Tung University, Hsinchu, 30010 Taiwan, Republic of China
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Yen YT, Lin YK, Chang SH, Hong HF, Tuan HY, Chueh YL. Investigation of bulk hybrid heterojunction solar cells based on Cu(In,Ga)Se2 nanocrystals. Nanoscale Res Lett 2013; 8:329. [PMID: 23870036 PMCID: PMC3733819 DOI: 10.1186/1556-276x-8-329] [Citation(s) in RCA: 3] [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] [Subscribe] [Scholar Register] [Received: 06/15/2013] [Accepted: 07/10/2013] [Indexed: 05/29/2023]
Abstract
This work presents the systematic studies of bulk hybrid heterojunction solar cells based on Cu(In, Ga)Se2 (CIGS) nanocrystals (NCs) embedded in poly(3-hexylthiophene) matrix. The CIGS NCs of approximately 17 nm in diameter were homogeneously blended with P3HT layer to form an active layer of a photovoltaic device. The blend ratios of CIGS NCs to P3HT, solvent effects on thin film morphologies, interface between P3HT/CIGS NCs and post-production annealing of devices were investigated, and the best performance of photovoltaic devices was measured under AM 1.5 simulated solar illumination (100 mW/cm2).
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Affiliation(s)
- Yu-Ting Yen
- Department of Materials Science & Engineering, National Tsing Hua University, No. 101, Sec. 2, Kuang-Fu Rd., Hsinchu 30013, Taiwan
| | - Yi-Kai Lin
- Department of Materials Science & Engineering, National Tsing Hua University, No. 101, Sec. 2, Kuang-Fu Rd., Hsinchu 30013, Taiwan
| | - Shu-Hao Chang
- Department of Chemical Engineering, National Tsing Hua University, No. 101, Sec. 2, Kuang-Fu Rd., Hsinchu 30013, Taiwan
| | - Hwen-Fen Hong
- Institute of Nuclear Energy Research, No. 1000, Wenhua Rd., Jiaan Village, Longtan Township, Taoyuan County 32546, Taiwan
| | - Hsing-Yu Tuan
- Department of Chemical Engineering, National Tsing Hua University, No. 101, Sec. 2, Kuang-Fu Rd., Hsinchu 30013, Taiwan
| | - Yu-Lun Chueh
- Department of Materials Science & Engineering, National Tsing Hua University, No. 101, Sec. 2, Kuang-Fu Rd., Hsinchu 30013, Taiwan
- Center For Nanotechnology, Material Science, and Microsystem, National Tsing Hua University, No. 101, Sec. 2, Kuang-Fu Rd., Hsinchu 30013, Taiwan
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Yen YT, Yang HR, Lo HC, Hsieh YC, Tsai SC, Hong CW, Hsieh CH. Enhancing autophagy with activated protein C and rapamycin protects against sepsis-induced acute lung injury. Surgery 2013; 153:689-98. [PMID: 23434181 DOI: 10.1016/j.surg.2012.11.021] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Accepted: 11/28/2012] [Indexed: 11/16/2022]
Abstract
BACKGROUND Autophagy plays distinct roles in apoptosis and the inflammatory process. Understanding the role of autophagy in sepsis-induced acute lung injury (ALI) may provide new insights into developing novel therapeutic strategies for this group of patients. The aim of this study was to investigate the regulation of autophagy in the septic lung and to use pharmacologic agents to modulate autophagy to study its functional significance. METHODS Mice were subjected to cecal ligation and puncture (CLP) or a sham operation. At 1 hour after CLP, mice were treated with vehicle, activated protein C (APC), rapamycin, or bafilomycin A1. Mice were humanely killed at 4 or 24 hours after the operation or were observed for ≤ 7 days. RESULTS CLP induced a systemic inflammatory response and significantly decreased survival. In lung tissue, increased leukocyte infiltration, inflammation, and apoptosis were observed. In contrast, autophagy was suppressed after CLP such that the expression of LC3II, Atg5, and Rab7 were downregulated. Rapamycin activated autophagy, limited the CLP-induced proinflammatory response, and downregulated apoptotic activity after CLP. The administration of APC after CLP had an effect similar to that of rapamycin. Both medications significantly improved survival 7 days after CLP. CONCLUSION The downregulation of autophagy may lead to systemic inflammation and ALI after sepsis. The direct or indirect modification of autophagy using rapamycin or APC, respectively, resulted in improved survival. Enhancing or restoring autophagy early after sepsis seems to be a potential strategy for the treatment of sepsis-induced ALI.
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Affiliation(s)
- Yu-Ting Yen
- Department of Acute Care Surgery, China Medical University, Taichung, Taiwan
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Wei JC, Yen YT, Wang YT, Hsu SH, Lin JJ. Enhancing silver nanoparticle and antimicrobial efficacy by the exfoliated clay nanoplatelets. RSC Adv 2013. [DOI: 10.1039/c3ra23476b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Hu W, Yen YT, Singh S, Kao CL, Wu-Hsieh BA. SARS-CoV regulates immune function-related gene expression in human monocytic cells. Viral Immunol 2012; 25:277-88. [PMID: 22876772 DOI: 10.1089/vim.2011.0099] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Severe acute respiratory syndrome (SARS) is characterized by acute respiratory distress syndrome (ARDS) and pulmonary fibrosis, and monocytes/macrophages are the key players in the pathogenesis of SARS. In this study, we compared the transcriptional profiles of SARS coronavirus (SARS-CoV)-infected monocytic cells against that infected by coronavirus 229E (CoV-229E). Total RNA was extracted from infected DC-SIGN-transfected monocytes (THP-1-DC-SIGN) at 6 and 24 h after infection, and the gene expression was profiled in oligonucleotide-based microarrays. Analysis of immune-related gene expression profiles showed that at 24 h after SARS-CoV infection: (1) IFN-α/β-inducible and cathepsin/proteasome genes were downregulated; (2) hypoxia/hyperoxia-related genes were upregulated; and (3) TLR/TLR-signaling, cytokine/cytokine receptor-related, chemokine/chemokine receptor-related, lysosome-related, MHC/chaperon-related, and fibrosis-related genes were differentially regulated. These results elucidate that SARS-CoV infection regulates immune-related genes in monocytes/macrophages, which may be important to the pathogenesis of SARS.
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Affiliation(s)
- Wanchung Hu
- Graduate Institute of Immunology, National Taiwan University College of Medicine, Taipei, Taiwan, ROC
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Chen SY, Yen YT, Chen YY, Hsu CS, Chueh YL, Chen LJ. Large scale two-dimensional nanobowl array high efficiency polymer solar cell. RSC Adv 2012. [DOI: 10.1039/c2ra01258h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Hui AT, Wang F, Han N, Yip S, Xiu F, Hou JJ, Yen YT, Hung T, Chueh YL, Ho JC. High-performance indium phosphide nanowires synthesized on amorphous substrates: from formation mechanism to optical and electrical transport measurements. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm31232h] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Lee HC, Yen YT, Chen WY, Wu-Hsieh BA, Wu SC. Dengue type 4 live-attenuated vaccine viruses passaged in vero cells affect genetic stability and dengue-induced hemorrhaging in mice. PLoS One 2011; 6:e25800. [PMID: 22053180 PMCID: PMC3203870 DOI: 10.1371/journal.pone.0025800] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [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: 05/28/2011] [Accepted: 09/11/2011] [Indexed: 12/16/2022] Open
Abstract
Most live-attenuated tetravalent dengue virus vaccines in current clinical trials are produced from Vero cells. In a previous study we demonstrated that an infectious cDNA clone-derived dengue type 4 (DEN-4) virus retains higher genetic stability in MRC-5 cells than in Vero cells. For this study we investigated two DEN-4 viruses: the infectious cDNA clone-derived DEN-4 2A and its derived 3' NCR 30-nucleotide deletion mutant DEN-4 2AΔ30, a vaccine candidate. Mutations in the C-prM-E, NS2B-NS3, and NS4B-NS5 regions of the DEN genome were sequenced and compared following cell passages in Vero and MRC-5 cells. Our results indicate stronger genetic stability in both viruses following MRC-5 cell passages, leading to significantly lower RNA polymerase error rates when the DEN-4 virus is used for genome replication. Although no significant increases in virus titers were observed following cell passages, DEN-4 2A and DEN-4 2AΔ30 virus titers following Vero cell passages were 17-fold to 25-fold higher than titers following MRC-5 cell passages. Neurovirulence for DEN-4 2A and DEN-4 2AΔ30 viruses increased significantly following passages in Vero cells compared to passages in MRC-5 cells. In addition, more severe DEN-induced hemorrhaging in mice was noted following DEN-4 2A and DEN-4 2AΔ30 passages in Vero cells compared to passages in MRC-5 cells. Target mutagenesis performed on the DEN-4 2A infectious clone indicated that single point mutation of E-Q(438)H, E-V(463)L, NS2B-Q(78)H, and NS2B-A(113)T imperatively increased mouse hemorrhaging severity. The relationship between amino acid mutations acquired during Vero cell passage and enhanced DEN-induced hemorrhages in mice may be important for understanding DHF pathogenesis, as well as for the development of live-attenuated dengue vaccines. Taken together, the genetic stability, virus yield, and DEN-induced hemorrhaging all require further investigation in the context of live-attenuated DEN vaccine development.
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Affiliation(s)
- Hsiang-Chi Lee
- Institute of Biotechnology, Department of Life Science, National Tsing Hua University, Hsinchu, Taiwan
| | - Yu-Ting Yen
- Graduate Institute of Immunology, National Taiwan University, College of Medicine, Taipei, Taiwan
| | - Wen-Yu Chen
- Graduate Institute of Immunology, National Taiwan University, College of Medicine, Taipei, Taiwan
| | - Betty A. Wu-Hsieh
- Graduate Institute of Immunology, National Taiwan University, College of Medicine, Taipei, Taiwan
| | - Suh-Chin Wu
- Institute of Biotechnology, Department of Life Science, National Tsing Hua University, Hsinchu, Taiwan
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Miaoli, Taiwan
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Liu CH, Chen CH, Chen SY, Yen YT, Kuo WC, Liao YK, Juang JY, Kuo HC, Lai CH, Chen LJ, Chueh YL. Large scale single-crystal Cu(In,Ga)Se2 nanotip arrays for high efficiency solar cell. Nano Lett 2011; 11:4443-4448. [PMID: 21910452 DOI: 10.1021/nl202673k] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In this paper, we demonstrated direct formation of large area Cu(In,Ga)Se(2) nanotip arrays (CIGS NTRs) by using one step Ar(+) milling process without template. By controlling milling time and incident angles, the length of CIGS NTRs with adjustable tilting orientations can be precisely controlled. Formation criteria of these CIGS NTRs have been discussed in terms of surface curvature, multiple components, and crystal quality, resulting in a highly anisotropic milling effect. The CIGS NTRs have very low reflectance <0.1% at incident wavelengths between 300 to 1200 nm. Open circuit voltage and short circuit current of CIGS NTRs solar cell were measured to be ∼390 mV and ∼22.56 mA/cm(2), yielding the filling factor and the efficiency of 59 and 5.2%, respectively. In contrast to CIGS thin film solar cell with efficiency of 3.2%, the nanostructured CIGS NTRs can have efficiency enhancement of ∼160% due to the higher light absorption ability because of the nanostructure. The merits of current approach include the latest way via template-free direct creating process of nanostructured CIGS NTRs with controllable dimensionality and large scale production without postselenization process.
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Affiliation(s)
- Chin-Hung Liu
- Department of Materials Science and Engineering, National Tsing Hua University , Hsinchu, 30013, Taiwan, ROC
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Abstract
Here we summarized our findings in the mouse model of the events that lead to dengue hemorrhage. Immunocompetent mice inoculated intradermally with DENV-2 strain 16681 develop hemorrhage locally or systemically. The incidence and the severity of hemorrhage development are dependent on the size of viral inoculum. The hemorrhage mice exhibit severe thrombocytopenia, prolonged bleeding time, and increased numbers of circulating endothelial cells. In the hemorrhage tissues, there is endothelial damage accompanied by infiltrating macrophages that secret TNF-alpha. The endothelial cells express iNOS and peroxynitrite and undergo apoptosis, indicating RNS and ROS production may lead to cell death. By using mice deficient in iNOS and phox47 and apocynin, we demonstrated that RNS and ROS are important to hemorrhage development after infection by DENV. Our mouse model offers the opportunity to test potential dengue vaccines and therapeutics to treat dengue hemorrhage and to test hemorrhage induction potentials of dengue viral strains.
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Affiliation(s)
- Betty A Wu-Hsieh
- National Taiwan University, College of Medicine, Graduate Institute of Immunology, Taipei, Taiwan.
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Yen YT, Wu-Hsieh B. Dengue viral component triggering reactive nitrogen and oxygen species production leads to endothelial cell apoptosis (45.33). The Journal of Immunology 2009. [DOI: 10.4049/jimmunol.182.supp.45.33] [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] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Vascular leakage is one of the life-threatening complications occurring in dengue patients, however, the pathogenic mechanism is not well understood. In dissecting the complex interplay between the virus and the host, we found that dengue virus productively infects the endothelial cells and causes apoptotic cell death through triggering the production of reactive nitrogen (RNS) and oxygen radicals (ROS).
To determine the dengue virus component(s) that is responsible for the cause of cell death, we transfected human microvascular endothelial cell HMEC with pCR3.1 plasmids encoding Flag-tagged viral components Core, PrM, NS1, NS2A, NS2B, NS3, NS2B-NS3, NS4A, NS4B, and NS5, separately. Apoptotsis in cells transfected with NS2B-NS3 was 10-fold higher and that in cells transfected with NS1, NS3 and NS5 or core was only between 4- to 6-fold higher than cells transfected with vector alone. Confocal microscopy revealed that while NS2B expression remained in the cytosol, NS3 and NS2B-NS3 in both the cytosol and the nucleus at 24 h after transfection. Interestingly, the effect of NS2B-NS3 on endothelial cells was reversed in the presence of NO and ROS inhibitors. These results demonstrate that NS2B-NS3, being the major component that induces endothelial cell apoptosis, interacts with subcellular components in both the cytosol and the nucleus, and induces the production of RNS and ROS to cause apoptotic outcome.
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Affiliation(s)
- Yu-Ting Yen
- 1Graduate Institute of Immunology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Betty Wu-Hsieh
- 1Graduate Institute of Immunology, National Taiwan University College of Medicine, Taipei, Taiwan
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Yen YT, Chen HC, Lin YD, Wu-Hsieh B. Endothelial cell apoptosis induced by Dengue virus (B133). The Journal of Immunology 2007. [DOI: 10.4049/jimmunol.178.supp.b133] [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] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Abstract
Vascular leakage and hemorrhagic diathesis are life-threatening complications that occur to dengue hemorrhagic patients. However, the pathogenic mechanism of hemorrhage is not well understood. It has been shown that endothelial cells are permissive to dengue virus (DV) infection in vitro and DV antigen is found in endothelial cells of autopsy specimens collected from patients who died of DHF. Therefore, the study of interaction between DV and endothelial cells will shed light on the mechanism of dengue hemorrhage.
We established a dengue hemorrhage mouse model in immunocompetent C57BL/6 mice by injecting DV serotype 2 strain 16681 intradermally. While high dose DV inoculation induced hemorrhage in all of the mice, 1/3 of those injected with 4–8 x 107 PFU developed hemorrhage in the subcutaneous tissues by day 3 of infection. Importantly, hemorrhage was accompanied by severe thrombocytopenia and vascular leakage. Double immunofluorescence staining revealed that DV targeted both macrophages and endothelial cells in the subcutaneous tissues. In vitro studies showed that human umbilical cord vein endothelial cells (HUVEC) and microvascular endothelial cell line (HMEC) were susceptible to DV and TNF-α enhanced DV-induced apoptosis. In addition, DV infection induced endothelial cell NOS and ROS production and endothelial cell apoptosis, which were also enhanced by TNF-α. These findings demonstrate that dengue virus and TNF-α-induced endothelial cell apoptosis is mediated by ROS and NO.
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Affiliation(s)
- Yu-Ting Yen
- Graduate Institute of Immunology, National Taiwan University College of Medicine, No.1 Jen-Ai Rd, Section 1, Taipei, 100, Taiwan
| | - Hsuen-Chin Chen
- Graduate Institute of Immunology, National Taiwan University College of Medicine, No.1 Jen-Ai Rd, Section 1, Taipei, 100, Taiwan
| | - Yang-Ding Lin
- Graduate Institute of Immunology, National Taiwan University College of Medicine, No.1 Jen-Ai Rd, Section 1, Taipei, 100, Taiwan
| | - Betty Wu-Hsieh
- Graduate Institute of Immunology, National Taiwan University College of Medicine, No.1 Jen-Ai Rd, Section 1, Taipei, 100, Taiwan
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Yen YT, Liao F, Hsiao CH, Kao CL, Chen YC, Wu-Hsieh BA. Modeling the early events of severe acute respiratory syndrome coronavirus infection in vitro. J Virol 2006; 80:2684-93. [PMID: 16501078 PMCID: PMC1395447 DOI: 10.1128/jvi.80.6.2684-2693.2006] [Citation(s) in RCA: 116] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The clinical picture of severe acute respiratory syndrome (SARS) is characterized by pulmonary inflammation and respiratory failure, resembling that of acute respiratory distress syndrome. However, the events that lead to the recruitment of leukocytes are poorly understood. To study the cellular response in the acute phase of SARS coronavirus (SARS-CoV)-host cell interaction, we investigated the induction of chemokines, adhesion molecules, and DC-SIGN (dendritic cell-specific ICAM-3-grabbing nonintegrin) by SARS-CoV. Immunohistochemistry revealed neutrophil, macrophage, and CD8 T-cell infiltration in the lung autopsy of a SARS patient who died during the acute phase of illness. Additionally, pneumocytes and macrophages in the patient's lung expressed P-selectin and DC-SIGN. In in vitro study, we showed that the A549 and THP-1 cell lines were susceptible to SARS-CoV. A549 cells produced CCL2/monocyte chemoattractant protein 1 (MCP-1) and CXCL8/interleukin-8 (IL-8) after interaction with SARS-CoV and expressed P-selectin and VCAM-1. Moreover, SARS-CoV induced THP-1 cells to express CCL2/MCP-1, CXCL8/IL-8, CCL3/MIP-1alpha, CXCL10/IP-10, CCL4/MIP-1beta, and CCL5/RANTES, which attracted neutrophils, monocytes, and activated T cells in a chemotaxis assay. We also demonstrated that DC-SIGN was inducible in THP-1 as well as A549 cells after SARS-CoV infection. Our in vitro experiments modeling infection in humans together with the study of a lung biopsy of a patient who died during the early phase of infection demonstrated that SARS-CoV, through a dynamic interaction with lung epithelial cells and monocytic cells, creates an environment conducive for immune cell migration and accumulation that eventually leads to lung injury.
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Affiliation(s)
- Yu-Ting Yen
- Graduate Institute of Immunology, College of Medicine, National Taiwan University, No. 1 Jen-Ai Road, Section 1, Taipei 10051, Taiwan
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Yen YT, Chen B, Chiu HW, Lee YC, Li YC, Hsu CY. Developing an NLP and IR-based algorithm for analyzing gene-disease relationships. Methods Inf Med 2006; 45:321-9. [PMID: 16685344] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
OBJECTIVES High-throughput techniques such as cDNA microarray, oligonucleotide arrays, and serial analysis of gene expression (SAGE) have been developed and used to automatically screen huge amounts of gene expression data. However, researchers usually spend lots of time and money on discovering gene-disease relationships by utilizing these techniques. We prototypically implemented an algorithm that can provide some kind of predicted results for biological researchers before they proceed with experiments, and it is very helpful for them to discover gene-disease relationships more efficiently. METHODS Due to the fast development of computer technology, many information retrieval techniques have been applied to analyze huge digital biomedical databases available worldwide. Therefore we highly expect that we can apply information retrieval (IR) technique to extract useful information for the relationship of specific diseases and genes from MEDLINE articles. Furthermore, we also applied natural language processing (NLP) methods to do the semantic analysis for the relevant articles to discover the relationships between genes and diseases. RESULTS We have extracted gene symbols from our literature collection according to disease MeSH classifications. We have also built an IR-based retrieval system, "Biomedical Literature Retrieval System (BLRS)" and applied the N-gram model to extract the relationship features which can reveal the relationship between genes and diseases. Finally, a relationship network of a specific disease has been built to represent the gene-disease relationships. CONCLUSIONS A relationship feature is a functional word that can reveal the relationship between one single gene and a disease. By incorporating many modern IR techniques, we found that BLRS is a very powerful information discovery tool for literature searching. A relationship network which contains the information on gene symbol, relationship feature, and disease MeSH term can provide an integrated view to discover gene-disease relationships.
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Affiliation(s)
- Y T Yen
- Graduate Institute of Medical Informatics, Taipei Medical University, Taipei, Taiwan
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Shaw JF, Chang RC, Chuang KH, Yen YT, Wang YJ, Wang FG. Nucleotide sequence of a novel arylesterase gene from Vibro mimicus and characterization of the enzyme expressed in Escherichia coli. Biochem J 1994; 298 Pt 3:675-80. [PMID: 8141782 PMCID: PMC1137913 DOI: 10.1042/bj2980675] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A gene coding for an arylesterase of Vibrio mimicus was cloned. Sequence determination reveals that the esterase gene has an open reading frame of 600 nucleotides which encodes a protein of M(r) 22,300. The deduced amino acid sequence contain a pentapeptide GDSLS (residues 27-31), which was also found in the phospholipid-cholesterol acyltransferase from Aeromonas hydrophila. Substitution of Ser-29 by alanine or cysteine in the cloned gene abolished the esterase activity in the tributyrin plate assay. On the other hand, the activity was not lost when Ser-31 was changed to alanine. The cloned gene was expressed in Escherichia coli, and the protein purified by a four-step procedure. The purified protein migrated on SDS/PAGE as a single band with an apparent M(r) of 22,100. This enzyme favoured the hydrolysis of several arylesters and was classified as an arylesterase (EC 3.1.1.2). N-Terminal analysis showed that Ser-20 was the first amino acid of the mature secreted protein, suggesting that the N-terminal 19 hydrophobic amino acids served as a signal peptide.
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Affiliation(s)
- J F Shaw
- Institute of Botany, Academia Sinica, Taipei, Taiwan, Republic of China
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Abstract
We have examined the effect of acetylcholine (ACh) pretreatment on the thyrotropin-releasing hormone (TRH) induced prolactin gene expression in GH3 cells, a rat pituitary tumor cell line. Prolonged exposure (greater than 6 h) to ACh enhanced the TRH-induced prolactin mRNA accumulation in a time- and concentration-dependent manner while ACh by itself did not affect the basal prolactin mRNA levels appreciably. Maximal augmentation of the TRH-induced prolactin mRNA accumulation was obtained when cells were pretreated with 10(-5) M ACh for 24 h. The activation was mimicked by carbachol and oxotremorine and was blocked by the simultaneous presence of atropine. Preincubation of GH3 cells with pertussis toxin abolished the augmenting effect of ACh. These results indicate that prolonged exposure to muscarinic receptor agonists may enhance the TRH-stimulated prolactin mRNA expression and a pertussis toxin sensitive G-protein may be involved.
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Affiliation(s)
- F F Wang
- Institute of Biochemistry, National Yang-Ming Medical College, Taipei, Taiwan, R.O.C
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Yen YT, Wu RT, Tang SJ, Wang FF. Expression of c-myc proto-oncogene during podophyllotoxin induced IW32 erythroleukemia cell differentiation. Biochem Biophys Res Commun 1991; 179:1241-6. [PMID: 1930169 DOI: 10.1016/0006-291x(91)91705-h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The effect of hemin or podophyllotoxin on the differentiation of the erythropoietin (epo)-producing IW32 erythroleukemia cells was investigated. Podophyllotoxin induced IW32 cells to differentiate, and hemin potentiated the differentiation. Hemin had no effect on cell proliferation whereas podophyllotoxin inhibited cell growth. c-myc mRNA levels decreased biphasically by hemin or podophyllotoxin, while the combined treatment of hemin plus podophyllotoxin did not result in the initial decrease in c-myc mRNA level. Our data suggested that down-regulation of c-myc expression was not a prerequisite of IW32 cell differentiation induced by hemin and podophyllotoxin combined.
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Affiliation(s)
- Y T Yen
- Institute of Biochemistry, Yang-Ming Medical College, Taipei, Taiwan
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Yen YT. [Opinion of nursing education in Taiwan]. Hu Li Za Zhi 1971; 18:49-52. [PMID: 5211803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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45
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Yen YT. Operational functions at health stations in Taiwan. Taiwan Yi Xue Hui Za Zhi 1971; 70:319-27. [PMID: 5293473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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46
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Yen YT. Use of medical students in studying health center operations in Taiwan. J Med Educ 1971; 46:466-469. [PMID: 5553438 DOI: 10.1097/00001888-197105000-00014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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47
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Yen YT. Health stations in Taiwan. Can J Public Health 1971; 62:161-4. [PMID: 5572715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Yen YT, Baker TD. A study on the quality of medical care in health stations. Taiwan Yi Xue Hui Za Zhi 1971; 70:21-7. [PMID: 5282559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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49
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Sun WM, Yen YT. [Opinions of students in nursing school]. Hu Li Za Zhi 1971; 18:72-5. [PMID: 5207643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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50
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Chen SP, Su CL, Yen YT. [Opinions of the faculty of nursing school for nursing education]. Hu Li Za Zhi 1970; 17:22-4. [PMID: 5207621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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