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  • 1
    Language: English
    In: Medical Microbiology and Immunology, 2009, Vol.198(2), pp.79-81
    Description: The (possible) relationship between HCMV and cancer has been discussed for decades. Detection of viral DNA, mRNA and/or antigens in tumour tissues as well as seroepidemiologic evidence suggested a role of HCMV infection in several human malignancies. However, controversial clinical results from diVerent groups had raised skepticism about a role of HCMV in cancer.
    Keywords: Cytomegalovirus–Physiology ; Cytomegalovirus Infections–Complications ; Humans–Etiology ; Neoplasms–Virology ; Neoplasms–Virology ; Infections ; Viruses ; Cancer ; Pathology;
    ISSN: 0300-8584
    E-ISSN: 1432-1831
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  • 2
    Language: English
    In: Journal of the National Cancer Institute, 01 April 2009, Vol.101(7), pp.441-3
    Description: Strååt et al. (1) show that human cytomegalovirus (HCMV) infection induces telomerase activation in human malignant glioma cells and fibroblasts. These results reveal a novel mechanism that may be relevant for the potential of HCMV to promote oncogenesis and thus provide another piece of the puzzle that has drawn the attention of oncologists and virologists for almost four decades.
    Keywords: Cytomegalovirus -- Metabolism ; Glioma -- Enzymology ; Immediate-Early Proteins -- Metabolism ; Oncogenic Viruses -- Metabolism ; Telomerase -- Metabolism
    ISSN: 00278874
    E-ISSN: 1460-2105
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  • 3
    Language: English
    In: Neoplasia (New York, N.Y.), January 2009, Vol.11(1), pp.1-9
    Description: Although human cytomegalovirus (HCMV) is generally not regarded to be an oncogenic virus, HCMV infection has been implicated in malignant diseases from different cancer entities. On the basis of our experimental findings, we developed the concept of "oncomodulation" to better explain the role of HCMV in cancer. Oncomodulation means that HCMV infects tumor cells and increases their malignancy. By this concept, HCMV was proposed to be a therapeutic target in a fraction of cancer patients. However, the clinical relevance of HCMV-induced oncomodulation remains to be clarified. One central question that has to be definitively answered is if HCMV establishes persistent virus replication in tumor cells or not. In our eyes, recent clinical findings from different groups in glioblastoma patients and especially the detection of a correlation between the numbers of HCMV-infected glioblastoma cells and tumor stage (malignancy) strongly increase the evidence that HCMV may exert oncomodulatory effects. Here, we summarize the currently available knowledge about the molecular mechanisms that may contribute to oncomodulation by HCMV as well as the clinical findings that suggest that a fraction of tumors from different entities is indeed infected with HCMV.
    Keywords: Cytomegalovirus -- Physiology ; Neoplasms -- Etiology
    E-ISSN: 1476-5586
    Source: MEDLINE/PubMed (U.S. National Library of Medicine)
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  • 4
    Language: English
    In: Medical Microbiology and Immunology, 2009, Vol.198(4), pp.257-262
    Description: A coupled luminescent method (CLM) based on glyceraldehyde-3-phosphate dehydrogenase released from injured target cells was used to evaluate the cytotoxicity of antigen-specific HLA class I-restricted CTLs. In contrast to established methods, CLM does not require the pretreatment of target cells with radioactive or toxic labeling substances. CTLs from healthy HLA-A2 positive donors were stimulated by autologous dendritic cells (DCs) pulsed with HLA-A2 restricted HCMV-pp65 nonamer peptides. HLA-A2 positive T2 cells or autologous monocytes pulsed with HCMV-pp65 nonamer peptide served as target cells. Lysis was detected only in HCMV-pp65-pulsed target cells incubated with CTLs from seropositive donors stimulated by HCMV-pp65-pulsed DCs. After 3 days, stimulation 38% of T2 cells and 17% of monocytes were lysed at an effector to target ratio of 8:1. In conclusion, CLM represents a highly sensitive, fast, material-saving and non-toxic/non-radioactive method for the measurement of antigen-specific CTL cytotoxic activity.
    Keywords: Cytotoxic T lymphocytes ; HLA-A2-restricted peptide ; Human cytomegalovirus ; Cytotoxicity ; Coupled luminescent method ; Dendritic cells
    ISSN: 0300-8584
    E-ISSN: 1432-1831
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