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  • Rabenau, Holger  (5)
  • Doerr, Hans  (5)
  • Cinatl, J.
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  • 1
    In: Journal of Clinical Microbiology, 2008, Vol. 46(6), p.2122
    Description: Here we describe for the first time the productive in vitro infection of human retinal pigment epithelial cells by varicella-zoster virus (VZV), resulting in a typical cytopathic effect (CPE) that is characterized by enlarged cells with increased granularity. Depending on the CPE dissemination, high titers of up to 1.6 x 10 super(6) PFU of cell-free and cryostable VZV/ml can be recovered.
    Keywords: Retinal Pigment Epithelium ; Retina ; Replication ; Pigments ; Infection ; Varicella-Zoster Virus ; Replication;
    ISSN: 0095-1137
    ISSN: 00951137
    E-ISSN: 1098660X
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  • 2
    In: The Journal of Virology, 2004, Vol. 78(17), p.9007
    Description: The worldwide outbreak of severe acute respiratory syndrome (SARS) was shown to be associated with a novel coronavirus (CoV) now called SARS CoV. We report here the generation of SARS CoV S protein-pseudotyped murine leukemia virus (MLV) vector particles. The wild-type S protein pseudotyped MLV vectors, although at a low efficiency. Partial deletion of the cytoplasmic tail of S dramatically increased infectivity of pseudotypes, with titers only two- to threefold lower than those of pseudotypes generated in parallel with the vesicular stomatitis virus G protein. S-pseudotyped MLV particles were used to analyze viral tropism. MLV(SARS) pseudotypes and wild-type SARS CoV displayed similar cell types and tissue and host restrictions, indicating that the expression of a functional receptor is the major restraint in permissiveness to SARS CoV infection. Efficient gene transfer could be detected in Vero and CaCo2 cells, whereas the level of gene marking of 293T, HeLa, and HepG2 cells was only slightly above background levels. A cat cell line and a dog cell line were not susceptible. Interestingly, PK-15, a porcine kidney cell line, and primary porcine kidney cells were also highly permissive for SARS S pseudotypes and wild-type SARS CoV. This finding suggests that swine may be susceptible to SARS infection and may be a source for infection of humans. Taken together, these results indicate that MLV(SARS) pseudotypes are highly valuable for functional studies of viral tropism and entry and, in addition, can be a powerful tool for the development of therapeutic entry inhibitors without posing a biohazard to human beings.
    Keywords: Sars Coronavirus ; Murine Leukemia Virus ; Vesicular Stomatitis Virus ; Sars Coronavirus ; Murine Leukemia Virus ; Vesicular Stomatitis Virus ; Expression Vectors ; Infection ; Host Range ; Severe Acute Respiratory Syndrome ; Kidney ; Tropism ; Leukemia ; Guanine Nucleotide-Binding Protein ; Gene Transfer ; Deletion ; Tails ; Infectivity ; Vesicular Stomatitis ; Background Levels ; Expression Vectors ; Severe Acute Respiratory Syndrome ; Kidney ; Tropism ; Guanine Nucleotide-Binding Protein ; Gene Transfer ; Deletion ; Infectivity ; Viral Genetics Including Virus Reactivation ; Cloning Vectors ; S Protein ; S Protein;
    ISSN: 0022-538X
    ISSN: 0022538X
    E-ISSN: 10985514
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  • 3
    Language: English
    In: In Vitro Cellular & Developmental Biology - Animal, 1992, Vol.28(3), pp.147-148
    Keywords: Biological sciences -- Biology -- Cytology ; Biological sciences -- Biology -- Cytology ; Biological sciences -- Biology -- Cytology ; Biological sciences -- Biology -- Cytology ; Applied sciences -- Laboratory techniques -- Culture techniques ; Physical sciences -- Chemistry -- Chemical compounds ; Physical sciences -- Chemistry -- Chemical compounds;
    ISSN: 0883-8364
    E-ISSN: 1543-706X
    E-ISSN: 2327431X
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  • 4
    Language: English
    In: Journal of tissue culture methods, 1989, Vol.12(2), pp.67-72
    Description: Mouse NCTC clone 929 L (L-929) cells were propagated continuously over 2 yr in protein-free Eagles's minimal essential medium (EMEM). The cells designated L-929-WS were used for quality-control testing of protein-free EMEM as a model for more general medium quality tests. The parameter for the suggested quality control assay was the growth-promoting activity of the medium for L-929-WS cells. As an example of quality tests we assayed the growth promoting activity of EMEM exposed to various conditions of storage time and temperature. We established the sensitivity of the new assay by comparing it to the original cells L-929 grown in EMEM supplemented with 10% fetal bovine serum (FBS). The assay system using L-929-WS cells propagated continuously in protein-free medium proved to be much more sensitive. The sensitivity, however, was abolished by the addition of FBS in a concentration as low as 1% to a culture medium.
    Keywords: protein-free medium ; quality control testing ; growth-promoting activity
    ISSN: 0271-8057
    E-ISSN: 1573-0603
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  • 5
    Language: English
    In: In Vitro Cellular & Developmental Biology, 1990, Vol.26(9), pp.841-842
    Keywords: Biology;
    ISSN: 0883-8364
    E-ISSN: 1475-2689
    E-ISSN: 2327431X
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