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Molecular analysis of new herpesvirusinfections

Molecular analysis of new herpesvirusinfections
新疱疹病毒感染的分子分析
批准号:
09670477
负责人:
YASUKAWA Masaki
金额:
$1.92万
依托单位:
依托单位国家:
日本
项目类别:
Grant-in-Aid for Scientific Research (C)
财政年份:
1997
资助国家:
日本
项目状态:
已结题
起止时间:
1997 至 1998

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中文摘要
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英文摘要
Human herpesvirus 6 (HHV-6), HHV-7 and KSHV (HHV-8) are new human herpesviruses which have been recently isolated. In the present study, the pathogenesis of these herpesvirus infections was investigated focusing on the functional alteration of virus-infected CD4+T lymphocytes. Results obtained from the series of the present study are as follows :1. HHV-6 infection of CD4+T lymphocytes resulted in their apoptosis. The degree of apoptosis increased when HHV-6-inoculated cells were cultured in the presence of TNF-a and anti-Fas antibody. HHV-6 induces apoptosis in CD4^+T cells by indirect mechanisms, as reported recently in HIV-1 infection.2. We examined the susceptibility to HHV-7 infection of various CD4-negative cell lines into which the cDNA for CD4 was transferred using an adenovirus vector. Out of 13 cell lines transduced with Adex1CACD4, 4 cell lines showed high susceptibility to HHV-7 infection. These data suggest strongly that CD4 is a major component of the binding receptor for … More HHV-7.3. Two novel Ph chromosome-positive myeloid cell lines, SAS4l3 and SAS527, which possess different hematologic characteristics and show distinct susceptibility to infection of HHV-6, have been established. TPA-treatment of SAS527 which was latently infected with HHV-6B resulted in reactivation of HHV-6. These novel cell lines should be useful for studying the mechanisms of HHV-6- induced hematopoietic failure and HHV-6 latency and reactivation.4. Although CXCR4 and CCR5 appeared not to be the coreceptors for these viruses, marked down-regulation of CXCR4, but not CCR5, was detected in HHV-6 and HHV-7-infected cells. Down-regulation of CXCR4 resulted in impairment of chemotaxis and a decreased level of elevation of the intracellular Ca^<2+> concentration in response to SDF-1. Northern blot analysis of mRNAs extracted from HHV-6- and HHV-7-infected CD4^+T lymphocytes demonstrated a markedly decreased level of CXCR4 gene transcription, but post-transcriptional stability of CXCR4 mRNA was not significantly altered. Less
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Yasukawa, M., et al.: "Down-regulation of CXCR4 by human herpesvirus 6 (HHV-6) and HHV-7" Journal of Immunology. (in press.).
Yasukawa, M., et al.:“人疱疹病毒 6 (HHV-6) 和 HHV-7 下调 CXCR4”免疫学杂志。
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作者: []
通讯作者:
Yasukawa,M.,et al.: "Human herpesvirus 7 infection of lymphoid and myeloid cell lines transduced with an adenovirus vector ・・・・・" Journal of Virology. 71. 1708-1712 (1997)
Yasukawa, M., et al.:“用腺病毒载体转导的人疱疹病毒 7 感染淋巴和骨髓细胞系……”病毒学杂志 71. 1708-1712 (1997)。
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通讯作者:
Inoue, Y., et al.: "Induction of T-cell apoptosis by human herpesvirus 6" Journal of Virology. 71. 3751-3759 (1997)
Inoue, Y., et al.:“人类疱疹病毒 6 诱导 T 细胞凋亡”病毒学杂志。
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作者: []
通讯作者:
Inoue,Y.,et al.: "Induction of T-cell apoptosis by human herpesvirus 6" Journal of Virology. 71. 3751-3759 (1997)
Inoue,Y.,et al.:“人类疱疹病毒 6 诱导 T 细胞凋亡”病毒学杂志。
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作者: []
通讯作者:
19
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