LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 7 of total 7

Search options

  1. Article ; Online: Does cold storage of blood before transfusion prevent the transmission of syphilis? A systematic review and meta-analysis.

    D'aes, Tine / Van de Sande, Dieter / De Buck, Emmy / Zachée, Pierre / Compernolle, Veerle / Vandekerckhove, Philippe

    Vox sanguinis

    2023  Volume 119, Issue 3, Page(s) 219–231

    Abstract: Background and objectives: Although screening of donated blood for syphilis is almost universally applied, its cost-effectiveness is questioned because of the low prevalence of transfusion-transmitted syphilis and a widespread belief that the syphilis- ... ...

    Abstract Background and objectives: Although screening of donated blood for syphilis is almost universally applied, its cost-effectiveness is questioned because of the low prevalence of transfusion-transmitted syphilis and a widespread belief that the syphilis-causing bacterium Treponema pallidum is very vulnerable to cold storage. Since the latter claim is not yet supported by a systematic review, we investigated whether syphilis can be transmitted via transfusion following prolonged (cold or room temperature) storage of blood products.
    Materials and methods: MEDLINE, PMC and NCBI bookshelf (PubMed interface), Cochrane Library, Embase, Web of Science and CINAHL were searched up to 17 January 2023.
    Results: Nine experimental animal studies and one observational human study were included. Meta-analysis showed that storing artificially infected human (six studies; risk ratio [RR] = 0.37, 95% confidence interval [CI]: 0.22-0.64, p = 0.0003) or rabbit (two studies; RR = 0.08, 95% CI: 0.01 to 0.55, p = 0.01) blood for more than 72 h before intratesticular injection significantly decreased the number of recipient animals that develop syphilis. Nonetheless, the possibility of syphilis transmission remained for up to 7 days. Differences could not be found for rabbit plasma (p = 0.60) or naturally infected rabbit blood (p = 0.28). There was limited evidence from one study in favour of the storage of artificially infected human platelets for over 72 h at cold temperatures (RR = 0.13, 95% CI: 0.03-0.52, p = 0.004) but not at room temperature (p = 0.12).
    Conclusion: Even though the infectivity of T. pallidum-spiked blood may decrease after 72 h of cold storage, the possibility for transfusion-transmitted syphilis may remain for several days after. The evidence is very uncertain, and conclusions are hindered by a lack of sufficiently powered studies and studies in humans. In addition, T. pallidum concentrations used in animal studies may be unrealistically high.
    MeSH term(s) Animals ; Humans ; Rabbits ; Syphilis/epidemiology ; Blood Transfusion ; Treponema pallidum ; Blood Platelets ; Plasma
    Language English
    Publishing date 2023-10-27
    Publishing country England
    Document type Meta-Analysis ; Systematic Review ; Journal Article
    ZDB-ID 80313-3
    ISSN 1423-0410 ; 0042-9007
    ISSN (online) 1423-0410
    ISSN 0042-9007
    DOI 10.1111/vox.13554
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: The nonconducting W434F mutant adopts upon membrane depolarization an inactivated-like state that differs from wild-type Shaker-IR potassium channels.

    Coonen, Laura / Martinez-Morales, Evelyn / Van De Sande, Dieter V / Snyders, Dirk J / Cortes, D Marien / Cuello, Luis G / Labro, Alain J

    Science advances

    2022  Volume 8, Issue 37, Page(s) eabn1731

    Abstract: Voltage-gated ... ...

    Abstract Voltage-gated K
    Language English
    Publishing date 2022-09-16
    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.abn1731
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article: Hydrophobic Drug/Toxin Binding Sites in Voltage-Dependent K

    Van Theemsche, Kenny M / Van de Sande, Dieter V / Snyders, Dirk J / Labro, Alain J

    Frontiers in pharmacology

    2020  Volume 11, Page(s) 735

    Abstract: ... In the ... ...

    Abstract In the Na
    Language English
    Publishing date 2020-05-15
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2587355-6
    ISSN 1663-9812
    ISSN 1663-9812
    DOI 10.3389/fphar.2020.00735
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Does Enhanced Structural Maturity of hiPSC-Cardiomyocytes Better for the Detection of Drug-Induced Cardiotoxicity?

    Van de Sande, Dieter / Ghasemi, Mohammadreza / Watters, Taylor / Burton, Francis / Pham, Ly / Altrocchi, Cristina / Gallacher, David J / Lu, Huarong / Smith, Godfrey

    Biomolecules

    2023  Volume 13, Issue 4

    Abstract: Human induced pluripotent stem cell derived cardiomyocytes (hiPSC-CMs) are currently used following the Comprehensive in vitro Proarrhythmic Assay (CiPA) initiative and subsequent recommendations in the International Council for Harmonization (ICH) ... ...

    Abstract Human induced pluripotent stem cell derived cardiomyocytes (hiPSC-CMs) are currently used following the Comprehensive in vitro Proarrhythmic Assay (CiPA) initiative and subsequent recommendations in the International Council for Harmonization (ICH) guidelines S7B and E14 Q&A, to detect drug-induced cardiotoxicity. Monocultures of hiPSC-CMs are immature compared to adult ventricular cardiomyocytes and might lack the native heterogeneous nature. We investigated whether hiPSC-CMs, treated to enhance structural maturity, are superior in detecting drug-induced changes in electrophysiology and contraction. This was achieved by comparing hiPSC-CMs cultured in 2D monolayers on the current standard (fibronectin matrix, FM), to monolayers on a coating known to promote structural maturity (CELLvo™ Matrix Plus, MM). Functional assessment of electrophysiology and contractility was made using a high-throughput screening approach involving the use of both voltage-sensitive fluorescent dyes for electrophysiology and video technology for contractility. Using 11 reference drugs, the response of the monolayer of hiPSC-CMs was comparable in the two experimental settings (FM and MM). The data showed no functionally relevant differences in electrophysiology between hiPSC-CMs in standard FM and MM, while contractility read-outs indicated an altered amplitude of contraction but not changes in time course. RNA profiling for cardiac proteins shows similarity of the RNA expression across the two forms of 2D culture, suggesting that cell-to-matrix adhesion differences may explain account for differences in contraction amplitude. The results support the view that hiPSC-CMs in both 2D monolayer FM and MM that promote structural maturity are equally effective in detecting drug-induced electrophysiological effects in functional safety studies.
    MeSH term(s) Humans ; Cardiotoxicity/diagnosis ; Cells, Cultured ; High-Throughput Screening Assays ; Induced Pluripotent Stem Cells/metabolism ; Myocytes, Cardiac/metabolism
    Language English
    Publishing date 2023-04-14
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2701262-1
    ISSN 2218-273X ; 2218-273X
    ISSN (online) 2218-273X
    ISSN 2218-273X
    DOI 10.3390/biom13040676
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Morpho-functional comparison of differentiation protocols to create iPSC-derived cardiomyocytes.

    Nijak, Aleksandra / Simons, Eline / Vandendriessche, Bert / Van de Sande, Dieter / Fransen, Erik / Sieliwończyk, Ewa / Van Gucht, Ilse / Van Craenenbroeck, Emeline / Saenen, Johan / Heidbuchel, Hein / Ponsaerts, Peter / Labro, Alain J / Snyders, Dirk / De Vos, Winnok / Schepers, Dorien / Alaerts, Maaike / Loeys, Bart L

    Biology open

    2022  Volume 11, Issue 2

    Abstract: Cardiomyocytes derived from induced pluripotent stem cells (iPSC-CMs) offer an attractive platform for cardiovascular research. Patient-specific iPSC-CMs are very useful for studying disease development, and bear potential for disease diagnostics, ... ...

    Abstract Cardiomyocytes derived from induced pluripotent stem cells (iPSC-CMs) offer an attractive platform for cardiovascular research. Patient-specific iPSC-CMs are very useful for studying disease development, and bear potential for disease diagnostics, prognosis evaluation and development of personalized treatment. Several monolayer-based serum-free protocols have been described for the differentiation of iPSCs into cardiomyocytes, but data on their performance are scarce. In this study, we evaluated two protocols that are based on temporal modulation of the Wnt/β-catenin pathway for iPSC-CM differentiation from four iPSC lines, including two control individuals and two patients carrying an SCN5A mutation. The SCN5A gene encodes the cardiac voltage-gated sodium channel (Nav1.5) and loss-of-function mutations can cause the cardiac arrhythmia Brugada syndrome. We performed molecular characterization of the obtained iPSC-CMs by immunostaining for cardiac specific markers and by expression analysis of selected cardiac structural and ionic channel protein-encoding genes with qPCR. We also investigated cell growth morphology, contractility and survival of the iPSC-CMs after dissociation. Finally, we performed electrophysiological characterization of the cells, focusing on the action potential (AP) and calcium transient (CT) characteristics using patch-clamping and optical imaging, respectively. Based on our comprehensive morpho-functional analysis, we concluded that both tested protocols result in a high percentage of contracting CMs. Moreover, they showed acceptable survival and cell quality after dissociation (>50% of cells with a smooth cell membrane, possible to seal during patch-clamping). Both protocols generated cells presenting with typical iPSC-CM AP and CT characteristics, although one protocol (that involves sequential addition of CHIR99021 and Wnt-C59) rendered iPSC-CMs, which were more accessible for patch-clamp and calcium transient experiments and showed an expression pattern of cardiac-specific markers more similar to this observed in human heart left ventricle samples.
    MeSH term(s) Action Potentials ; Cell Differentiation ; Electrophysiological Phenomena ; Humans ; Induced Pluripotent Stem Cells ; Myocytes, Cardiac
    Language English
    Publishing date 2022-02-23
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2632264-X
    ISSN 2046-6390 ; 2046-6390
    ISSN (online) 2046-6390
    ISSN 2046-6390
    DOI 10.1242/bio.059016
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article: Pharmacological Profile of the Sodium Current in Human Stem Cell-Derived Cardiomyocytes Compares to Heterologous Nav1.5+β1 Model.

    Van de Sande, Dieter V / Kopljar, Ivan / Teisman, Ard / Gallacher, David J / Snyders, Dirk J / Lu, Hua Rong / Labro, Alain J

    Frontiers in pharmacology

    2019  Volume 10, Page(s) 1374

    Abstract: The cardiac Nav1.5 mediated sodium current ( ... ...

    Abstract The cardiac Nav1.5 mediated sodium current (I
    Language English
    Publishing date 2019-12-11
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2587355-6
    ISSN 1663-9812
    ISSN 1663-9812
    DOI 10.3389/fphar.2019.01374
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: The resting membrane potential of hSC-CM in a syncytium is more hyperpolarised than that of isolated cells.

    Van de Sande, Dieter V / Kopljar, Ivan / Maaike, Alaerts / Teisman, Ard / Gallacher, David J / Bart, Loeys / Snyders, Dirk J / Leybaert, Luc / Lu, Hua Rong / Labro, Alain J

    Channels (Austin, Tex.)

    2021  Volume 15, Issue 1, Page(s) 239–252

    Abstract: Human-induced pluripotent stem cell (hiPSC) and stem cell (hSC) derived cardiomyocytes (CM) are gaining popularity as in vitro model for cardiology and pharmacology studies. A remaining flaw of these cells, as shown by single-cell electrophysiological ... ...

    Abstract Human-induced pluripotent stem cell (hiPSC) and stem cell (hSC) derived cardiomyocytes (CM) are gaining popularity as in vitro model for cardiology and pharmacology studies. A remaining flaw of these cells, as shown by single-cell electrophysiological characterization, is a more depolarized resting membrane potential (RMP) compared to native CM. Most reports attribute this to a lower expression of the Kir2.1 potassium channel that generates the I
    MeSH term(s) Giant Cells ; Membrane Potentials ; Myocytes, Cardiac ; Patch-Clamp Techniques ; Potassium
    Chemical Substances Potassium (RWP5GA015D)
    Language English
    Publishing date 2021-01-12
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2262854-X
    ISSN 1933-6969 ; 1933-6969
    ISSN (online) 1933-6969
    ISSN 1933-6969
    DOI 10.1080/19336950.2021.1871815
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top