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  1. Article ; Online: Do reduced numbers of plasmacytoid dendritic cells contribute to the aggressive clinical course of COVID-19 in chronic lymphocytic leukaemia?

    Smith, Carl Inge Edvard / Zain, Rula / Österborg, Anders / Palma, Marzia / Buggert, Marcus / Bergman, Peter / Bryceson, Yenan

    Scandinavian journal of immunology

    2022  Volume 95, Issue 4, Page(s) e13153

    Abstract: Infections with SARS-CoV-2 have been unduly severe in patients with haematological malignancies, in particular in those with chronic lymphocytic leukaemia (CLL). Based on a series of observations, we propose that an underlying mechanism for the ... ...

    Abstract Infections with SARS-CoV-2 have been unduly severe in patients with haematological malignancies, in particular in those with chronic lymphocytic leukaemia (CLL). Based on a series of observations, we propose that an underlying mechanism for the aggressive clinical course of COVID-19 in CLL is a paucity of plasmacytoid dendritic cells (pDCs) in these patients. Indeed, pDCs express Toll-like receptor 7 (TLR7), which together with interferon-regulatory factor 7 (IRF7), enables pDCs to produce large amounts of type I interferons, essential for combating COVID-19. Treatment of CLL with Bruton's tyrosine kinase (BTK) inhibitors increased the number of pDCs, likely secondarily to the reduction in the tumour burden.
    MeSH term(s) COVID-19/complications ; Dendritic Cells ; Humans ; Interferon Regulatory Factor-7 ; Leukemia, Lymphocytic, Chronic, B-Cell/complications ; Leukemia, Lymphocytic, Chronic, B-Cell/drug therapy ; SARS-CoV-2 ; Toll-Like Receptor 7
    Chemical Substances IRF7 protein, human ; Interferon Regulatory Factor-7 ; Toll-Like Receptor 7
    Language English
    Publishing date 2022-03-16
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 120476-2
    ISSN 1365-3083 ; 0300-9475
    ISSN (online) 1365-3083
    ISSN 0300-9475
    DOI 10.1111/sji.13153
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Repeatable, Inducible Micro-RNA-Based Technology Tightly Controls Liver Transgene Expression.

    Oprea, Iulian I / Viola, Joana R / Moreno, Pedro M D / Simonson, Oscar E / Rodin, Sergey / Teller, Nathalie / Tryggvason, Karl / Lundin, Karin E / Girnita, Leonard / Smith, Carl Inge Edvard

    Molecular therapy. Nucleic acids

    2014  Volume 3, Page(s) e172

    Abstract: Inducible systems for gene expression emerge as a new class of artificial vectors offering temporal and spatial exogenous control of gene expression. However, most inducible systems are less efficient in vivo and lack the target-organ specificity. In the ...

    Abstract Inducible systems for gene expression emerge as a new class of artificial vectors offering temporal and spatial exogenous control of gene expression. However, most inducible systems are less efficient in vivo and lack the target-organ specificity. In the present study, we have developed and optimized an oligonucleotide-based inducible system for the in vivo control of transgenes in the liver. We generated a set of simple, inducible plasmid-vectors based on the addition of four units of liver-specific miR-122 target sites to the 3'untranslated region of the gene of interest. Once the vector was delivered into hepatocytes this modification induced a dramatic reduction of gene expression that could be restored by the infusion of an antagomir for miR-122. The efficiency of the system was tested in vivo, and displayed low background and strong increase in gene expression upon induction. Moreover, gene expression was repeatedly induced even several months after the first induction showing no toxic effect in vivo. By combining tissue-specific control elements with antagomir treatment we generated, optimized and validated a robust inducible system that could be used successfully for in vivo experimental models requiring tight and cyclic control of gene expression.
    Language English
    Publishing date 2014-07-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2662631-7
    ISSN 2162-2531
    ISSN 2162-2531
    DOI 10.1038/mtna.2014.25
    Database MEDical Literature Analysis and Retrieval System OnLINE

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