LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 35

Search options

  1. Article ; Online: Triplet Sensitization and Photon Upconversion Using InP-Based Quantum Dots.

    Lai, Runchen / Sang, Youbao / Zhao, Yang / Wu, Kaifeng

    Journal of the American Chemical Society

    2020  Volume 142, Issue 47, Page(s) 19825–19829

    Abstract: Molecular triplet sensitization using colloidal semiconductor nanocrystals or quantum dots (QDs) is important for many photochemical and photonic applications. Current QD sensitizers often contain toxic elements such as Cd and Pb. In order to "go green" ... ...

    Abstract Molecular triplet sensitization using colloidal semiconductor nanocrystals or quantum dots (QDs) is important for many photochemical and photonic applications. Current QD sensitizers often contain toxic elements such as Cd and Pb. In order to "go green" with these sensitizers, we investigate triplet energy transfer from InP-based QDs. Time-resolved spectroscopy studies revealed picosecond hole trapping in core-only QDs, which could complicate and/or inhibit energy transfer. We therefore developed InP/ZnSe/ZnS core/shell QDs that effectively suppressed hole trapping and meanwhile allowed for triplet energy transfer to surface-anchored anthracene acceptors with an efficiency of 84%. The sensitized molecular triplets participated in triplet-triplet-annihilation, enabling photon upconversion with a normalized quantum yield reaching 10.0% ± 0.1%. This study demonstrates that nontoxic InP-based QDs can be engineered to be on par with state-of-the-art Cd- or Pb-containing QDs for use as triplet sensitizers.
    Language English
    Publishing date 2020-11-10
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 3155-0
    ISSN 1520-5126 ; 0002-7863
    ISSN (online) 1520-5126
    ISSN 0002-7863
    DOI 10.1021/jacs.0c09547
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: A surgical Decision-making scoring model for spontaneous ventilation- and mechanical ventilation-video-assisted thoracoscopic surgery in non-small-cell lung cancer patients.

    Wang, Runchen / Wang, Qixia / Liang, Hengrui / Ye, Zhiming / Qiu, Jiawen / Jiang, Yu / He, Jianxing / Zhao, Lei / Wang, Wei

    BMC surgery

    2023  Volume 23, Issue 1, Page(s) 290

    Abstract: Backgrounds: Spontaneous ventilation-video-assisted thoracoscopic surgery (SV-VATS) has been applied to non-small cell lung cancer (NSCLC) patients in many centers. Since it remains a new and challenging surgical technique, only selected patients can be ...

    Abstract Backgrounds: Spontaneous ventilation-video-assisted thoracoscopic surgery (SV-VATS) has been applied to non-small cell lung cancer (NSCLC) patients in many centers. Since it remains a new and challenging surgical technique, only selected patients can be performed SV-VATS. We aim to conduct a retrospective single-center study to develop a clinical decision-making model to make surgery decision between SV-VATS and MV (mechanical ventilation) -VATS in NSCLC patients more objectively and individually.
    Methods: Four thousand three hundred sixty-eight NSCLC patients undergoing SV-VATS or MV-VATS in the department of thoracic surgery between 2011 and 2018 were included. Univariate and multivariate regression analysis were used to identify potential factors influencing the surgical decisions. Factors with statistical significance were selected for constructing the Surgical Decision-making Scoring (SDS) model. The performance of the model was validated by area under the receiver operating characteristic curve (AUC), calibration curves and decision curve analysis (DCA).
    Results: The Surgical Decision-making Scoring (SDS) model was built guided by the clinical judgment and statistically significant results of univariate and multivariate regression analyses of potential predictors, including smoking status (p = 0.03), BMI (p < 0.001), ACCI (p = 0.04), T stage (p < 0.001), N stage (p < 0.001), ASA grade (p < 0.001) and surgical technique (p < 0.001). The AUC of the training group and the testing group were 0.72 and 0.70, respectively. The calibration curves and the DCA curve revealed that the SDS model has a desired performance in predicting the surgical decision.
    Conclusions: This SDS model is the first clinical decision-making model developed for an individual NSCLC patient to make decision between SV-VATS and MV-VATS.
    MeSH term(s) Humans ; Carcinoma, Non-Small-Cell Lung/surgery ; Lung Neoplasms/surgery ; Respiration, Artificial ; Retrospective Studies ; Thoracic Surgery, Video-Assisted
    Language English
    Publishing date 2023-09-25
    Publishing country England
    Document type Journal Article
    ZDB-ID 2050442-1
    ISSN 1471-2482 ; 1471-2482
    ISSN (online) 1471-2482
    ISSN 1471-2482
    DOI 10.1186/s12893-023-02150-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Tuning Precursor-Amine Interactions for Light-Emitting Lead Bromide Perovskites.

    Xing, Shiyu / Lian, Yaxiao / Lai, Runchen / Cao, Xuhui / Yu, Minhui / Zhang, Guoling / Zhao, Baodan / Di, Dawei

    The journal of physical chemistry letters

    2022  Volume 13, Issue 2, Page(s) 704–710

    Abstract: Organic additives with amino moieties are effective in improving the properties of archetypical formamidinium (FA)-based hybrid perovskites for photovoltaic and light-emitting applications. However, a detailed understanding of how amino additives affect ... ...

    Abstract Organic additives with amino moieties are effective in improving the properties of archetypical formamidinium (FA)-based hybrid perovskites for photovoltaic and light-emitting applications. However, a detailed understanding of how amino additives affect the perovskite materials is lacking, impeding developments in this area. Here, by investigating the interactions of lead bromide perovskite precursors with phenethylamine (PEA) and its derivatives with small variations in chemical structure, we reveal that only the secondary amine (
    Language English
    Publishing date 2022-01-13
    Publishing country United States
    Document type Journal Article
    ISSN 1948-7185
    ISSN (online) 1948-7185
    DOI 10.1021/acs.jpclett.1c03977
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Germanium-lead perovskite light-emitting diodes

    Dexin Yang / Guoling Zhang / Runchen Lai / Yao Cheng / Yaxiao Lian / Min Rao / Dexuan Huo / Dongchen Lan / Baodan Zhao / Dawei Di

    Nature Communications, Vol 12, Iss 1, Pp 1-

    2021  Volume 7

    Abstract: Lead toxicity poses a big hurdle for the commercialization of perovskite optoelectronics, hence reducing the environmental impact holds the answer for its future application. To tackle this challenge, the authors utilize germanium to reduce the lead ... ...

    Abstract Lead toxicity poses a big hurdle for the commercialization of perovskite optoelectronics, hence reducing the environmental impact holds the answer for its future application. To tackle this challenge, the authors utilize germanium to reduce the lead content, enabling highly luminescent eco-friendly compound for LEDs.
    Keywords Science ; Q
    Language English
    Publishing date 2021-07-01T00:00:00Z
    Publisher Nature Portfolio
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  5. Article ; Online: Ultralow-voltage operation of light-emitting diodes.

    Lian, Yaxiao / Lan, Dongchen / Xing, Shiyu / Guo, Bingbing / Ren, Zhixiang / Lai, Runchen / Zou, Chen / Zhao, Baodan / Friend, Richard H / Di, Dawei

    Nature communications

    2022  Volume 13, Issue 1, Page(s) 3845

    Abstract: For a light-emitting diode (LED) to generate light, the minimum voltage required is widely considered to be the emitter's bandgap divided by the elementary charge. Here we show for many classes of LEDs, including those based on perovskite, organic, ... ...

    Abstract For a light-emitting diode (LED) to generate light, the minimum voltage required is widely considered to be the emitter's bandgap divided by the elementary charge. Here we show for many classes of LEDs, including those based on perovskite, organic, quantum-dot and III-V semiconductors, light emission can be observed at record-low voltages of 36-60% of their bandgaps, exhibiting a large apparent energy gain of 0.6-1.4 eV per photon. For 17 types of LEDs with different modes of charge injection and recombination (dark saturation currents of ~10
    Language English
    Publishing date 2022-07-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-022-31478-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Hydraulic resistance induces cell phenotypic transition in confinement.

    Zhao, Runchen / Cui, Siqi / Ge, Zhuoxu / Zhang, Yuqi / Bera, Kaustav / Zhu, Lily / Sun, Sean X / Konstantopoulos, Konstantinos

    Science advances

    2021  Volume 7, Issue 17

    Abstract: Cells penetrating into confinement undergo mesenchymal-to-amoeboid transition. The topographical features of the microenvironment expose cells to different hydraulic resistance levels. How cells respond to hydraulic resistance is unknown. We show that ... ...

    Abstract Cells penetrating into confinement undergo mesenchymal-to-amoeboid transition. The topographical features of the microenvironment expose cells to different hydraulic resistance levels. How cells respond to hydraulic resistance is unknown. We show that the cell phenotype shifts from amoeboid to mesenchymal upon increasing resistance. By combining automated morphological tracking and wavelet analysis along with fluorescence recovery after photobleaching (FRAP), we found an oscillatory phenotypic transition that cycles from blebbing to short, medium, and long actin network formation, and back to blebbing. Elevated hydraulic resistance promotes focal adhesion maturation and long actin filaments, thereby reducing the period required for amoeboid-to-mesenchymal transition. The period becomes independent of resistance upon blocking the mechanosensor TRPM7. Mathematical modeling links intracellular calcium oscillations with actomyosin turnover and force generation and recapitulates experimental data. We identify hydraulic resistance as a critical physical cue controlling cell phenotype and present an approach for connecting fluorescent signal fluctuations to morphological oscillations.
    Language English
    Publishing date 2021-04-23
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 2810933-8
    ISSN 2375-2548 ; 2375-2548
    ISSN (online) 2375-2548
    ISSN 2375-2548
    DOI 10.1126/sciadv.abg4934
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Cellular senescence in hepatocellular carcinoma induced by a long non-coding RNA-encoded peptide PINT87aa by blocking FOXM1-mediated

    Xiang, Xiaohong / Fu, Yunong / Zhao, Kun / Miao, Runchen / Zhang, Xing / Ma, Xiaohua / Liu, Chang / Zhang, Nu / Qu, Kai

    Theranostics

    2021  Volume 11, Issue 10, Page(s) 4929–4944

    Abstract: Rationale: ...

    Abstract Rationale:
    MeSH term(s) Animals ; Carcinoma, Hepatocellular/genetics ; Cell Line, Tumor ; Cellular Senescence/genetics ; Electron Transport Complex IV/metabolism ; Forkhead Box Protein M1/metabolism ; Hep G2 Cells ; Humans ; Liver Neoplasms/genetics ; Lysosomal Membrane Proteins/metabolism ; Mice ; Mice, Nude ; Microtubule-Associated Proteins/metabolism ; Mitophagy/genetics ; Neoplasm Transplantation ; Peptides ; Prohibitins ; RNA, Long Noncoding/genetics ; Repressor Proteins/metabolism
    Chemical Substances FOXM1 protein, human ; Forkhead Box Protein M1 ; LAMP1 protein, human ; Lysosomal Membrane Proteins ; MAP1LC3B protein, human ; Microtubule-Associated Proteins ; PHB2 protein, human ; Peptides ; Phb2 protein, mouse ; Prohibitins ; RNA, Long Noncoding ; Repressor Proteins ; COX4I1 protein, human (EC 1.9.3.1) ; Electron Transport Complex IV (EC 1.9.3.1)
    Language English
    Publishing date 2021-03-04
    Publishing country Australia
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2592097-2
    ISSN 1838-7640 ; 1838-7640
    ISSN (online) 1838-7640
    ISSN 1838-7640
    DOI 10.7150/thno.55672
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Germanium-lead perovskite light-emitting diodes.

    Yang, Dexin / Zhang, Guoling / Lai, Runchen / Cheng, Yao / Lian, Yaxiao / Rao, Min / Huo, Dexuan / Lan, Dongchen / Zhao, Baodan / Di, Dawei

    Nature communications

    2021  Volume 12, Issue 1, Page(s) 4295

    Abstract: Reducing environmental impact is a key challenge for perovskite optoelectronics, as most high-performance devices are based on potentially toxic lead-halide perovskites. For photovoltaic solar cells, tin-lead (Sn-Pb) perovskite materials provide a ... ...

    Abstract Reducing environmental impact is a key challenge for perovskite optoelectronics, as most high-performance devices are based on potentially toxic lead-halide perovskites. For photovoltaic solar cells, tin-lead (Sn-Pb) perovskite materials provide a promising solution for reducing toxicity. However, Sn-Pb perovskites typically exhibit low luminescence efficiencies, and are not ideal for light-emitting applications. Here we demonstrate highly luminescent germanium-lead (Ge-Pb) perovskite films with photoluminescence quantum efficiencies (PLQEs) of up to ~71%, showing a considerable relative improvement of ~34% over similarly prepared Ge-free, Pb-based perovskite films. In our initial demonstration of Ge-Pb perovskite LEDs, we achieve external quantum efficiencies (EQEs) of up to ~13.1% at high brightness (~1900 cd m
    Language English
    Publishing date 2021-07-13
    Publishing country England
    Document type Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-021-24616-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: The importance of water and hydraulic pressure in cell dynamics.

    Li, Yizeng / Konstantopoulos, Konstantinos / Zhao, Runchen / Mori, Yoichiro / Sun, Sean X

    Journal of cell science

    2020  Volume 133, Issue 20

    Abstract: All mammalian cells live in the aqueous medium, yet for many cell biologists, water is a passive arena in which proteins are the leading players that carry out essential biological functions. Recent studies, as well as decades of previous work, have ... ...

    Abstract All mammalian cells live in the aqueous medium, yet for many cell biologists, water is a passive arena in which proteins are the leading players that carry out essential biological functions. Recent studies, as well as decades of previous work, have accumulated evidence to show that this is not the complete picture. Active fluxes of water and solutes of water can play essential roles during cell shape changes, cell motility and tissue function, and can generate significant mechanical forces. Moreover, the extracellular resistance to water flow, known as the hydraulic resistance, and external hydraulic pressures are important mechanical modulators of cell polarization and motility. For the cell to maintain a consistent chemical environment in the cytoplasm, there must exist an intricate molecular system that actively controls the cell water content as well as the cytoplasmic ionic content. This system is difficult to study and poorly understood, but ramifications of which may impact all aspects of cell biology from growth to metabolism to development. In this Review, we describe how mammalian cells maintain the cytoplasmic water content and how water flows across the cell surface to drive cell movement. The roles of mechanical forces and hydraulic pressure during water movement are explored.
    MeSH term(s) Animals ; Cell Movement ; Cell Shape ; Cytoplasm ; Ions ; Water
    Chemical Substances Ions ; Water (059QF0KO0R)
    Language English
    Publishing date 2020-10-21
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S. ; Review
    ZDB-ID 2993-2
    ISSN 1477-9137 ; 0021-9533
    ISSN (online) 1477-9137
    ISSN 0021-9533
    DOI 10.1242/jcs.240341
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Cytokinesis machinery promotes cell dissociation from collectively migrating strands in confinement.

    Law, Robert A / Kiepas, Alexander / Desta, Habben E / Perez Ipiña, Emiliano / Parlani, Maria / Lee, Se Jong / Yankaskas, Christopher L / Zhao, Runchen / Mistriotis, Panagiotis / Wang, Nianchao / Gu, Zhizhan / Kalab, Petr / Friedl, Peter / Camley, Brian A / Konstantopoulos, Konstantinos

    Science advances

    2023  Volume 9, Issue 2, Page(s) eabq6480

    Abstract: Cells tune adherens junction dynamics to regulate epithelial integrity in diverse (patho)physiological processes, including cancer metastasis. We hypothesized that the spatially confining architecture of peritumor stroma promotes metastatic cell ... ...

    Abstract Cells tune adherens junction dynamics to regulate epithelial integrity in diverse (patho)physiological processes, including cancer metastasis. We hypothesized that the spatially confining architecture of peritumor stroma promotes metastatic cell dissemination by remodeling cell-cell adhesive interactions. By combining microfluidics with live-cell imaging, FLIM/FRET biosensors, and optogenetic tools, we show that confinement induces leader cell dissociation from cohesive ensembles. Cell dissociation is triggered by myosin IIA (MIIA) dismantling of E-cadherin cell-cell junctions, as recapitulated by a mathematical model. Elevated MIIA contractility is controlled by RhoA/ROCK activation, which requires distinct guanine nucleotide exchange factors (GEFs). Confinement activates RhoA via nucleocytoplasmic shuttling of the cytokinesis-regulatory proteins RacGAP1 and Ect2 and increased microtubule dynamics, which results in the release of active GEF-H1. Thus, confining microenvironments are sufficient to induce cell dissemination from primary tumors by remodeling E-cadherin cell junctions via the interplay of microtubules, nuclear trafficking, and RhoA/ROCK/MIIA pathway and not by down-regulating E-cadherin expression.
    MeSH term(s) Cadherins/metabolism ; Cytokinesis/physiology ; Intercellular Junctions/metabolism ; Microtubules/metabolism ; Rho Guanine Nucleotide Exchange Factors/genetics ; Rho Guanine Nucleotide Exchange Factors/metabolism ; Humans
    Chemical Substances Cadherins ; Rho Guanine Nucleotide Exchange Factors
    Language English
    Publishing date 2023-01-11
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2810933-8
    ISSN 2375-2548 ; 2375-2548
    ISSN (online) 2375-2548
    ISSN 2375-2548
    DOI 10.1126/sciadv.abq6480
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top