宿主細(xì)胞調(diào)控HIV-1復(fù)制和潛伏的分子機制
文內(nèi)圖片:
圖片說明:Rev介導(dǎo)HIV-1mRNA的出核
[Abstract]:The first part: host factor Naf1 modulates HIV-1 replication of human immunodeficiency virus (Human Immunodeficiency Virus,HIV-1) belongs to retrovirus, and its replication cycle mainly includes the following links: virus binds to host target cells (mainly CD4 T cells) through receptor and auxiliary receptor, shelled, reverse transcriptional synthesis of double stranded c DNA enters the nucleus and integrates into the host genome. The transcription and shearing of viral genes, the transport of virus m RNA to cytoplasm, the translation of viral proteins and the packaging of virus particles, budding and maturation, etc. Further study on the mechanism of HIV-1 hijacking and utilization of host system will help us to find and identify antiviral drugs and gene therapy methods for host proteins. We used genomics to screen a variety of host proteins that potentially regulate HIV-1 replication. Among them, Naf1 (HIV-1 Nef-associated factor 1) is a host factor that depends on CRM1 (Chromosome region maintenance 1), which can shuttle between nucleus and cytoplasm and regulate multiple receptor-mediated signaling pathways in inflammatory response. Naf1 located in cytoplasm can inhibit the activation of NF- kappa B by binding A20 protein. This inactivation of NF- kappa B caused by Naf1 is related to the pathogenesis of a variety of host autoimmune diseases. However, the effect of Naf1 on HIV-1 infection and replication is not clear. Our study found that Naf1 can promote the nucleation of uncut gag m RNA in HIV-1, and the function of Naf1 depends on the interaction with another host factor CRM1 and is related to the shuttling characteristics of Naf1 between nucleus and cytoplasm. This study revealed the mechanism of host factor Naf1 regulating HIV-1 replication, which provided a potential host target for antiviral drug design and gene therapy. The second part is the mechanism of dendritic cells activating latent HIV-1 although highly effective antiretrovirus therapy for (Highly active antiretroviral therapy,HAART can significantly reduce the plasma viral load and prolong the life of patients infected with HIV-1 virus, but the latent / persistent infection HIV-1 can not be eliminated by drugs, which is one of the difficulties in the treatment of HIV/AIDS. At present, the mechanism of establishing, maintaining and reactivating HIV-1 latent infection is not very clear. Dendritic cells (Dendritic cells,DC), as important antigen presenting cells, can activate T cells in the immune response of antifungal chlamydia and play a double-edged role in the process of HIV-1 infection. In this study, we investigated the role of DCs in inducing latent HIV-1 activation, and found that DCs activated the replication of latent HIV-1 in CD4 T cells by producing anti-latent cytokine TNF- 偽. Co-culture with HIV-1 latent infected CD4 T cells can promote DCs maturation and TNF- 偽 release, which depends on CD40-CD40L signaling pathway. In addition, our results show that AIDS related pathogen stimulation can also induce DCs maturation and promote CD40 expression on DCs surface, thus enhancing the ability of DCs to activate latent HIV-1. Understanding the activation mechanism of DCs-mediated latent HIV-1 will help us to propose a new antiviral latent treatment scheme and develop an effective treatment strategy for clearing HIV-1 virus library.
【學(xué)位授予單位】:蘇州大學(xué)
【學(xué)位級別】:博士
【學(xué)位授予年份】:2016
【分類號】:R512.91
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