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Altered global gene profile in KSHV-infected primary oral fibroblasts

ABSTRACT: The Kaposi sarcoma-associated herpesvirus (KSHV) is the causative agent of Kaposi sarcoma (KS), the most common HIV/AIDS-associated tumor worldwide. Involvement of the oral cavity portends a poor prognosis for patients with KS, but mechanisms for KSHV regulation of the oral tumor microenvironment are largely unknown. Infiltrating fibroblasts are found with KS lesions, and KSHV establishes latent infection within human primary fibroblasts in vitro, but contributions for KSHV-infected fibroblasts to the KS microenvironment have not been previously characterized. In the present study, we used Illumina microarray to detect the global gene profile altered in KSHV-infected primary human fibroblasts (PDLF and HGF) isolated from the oral cavity.

ORGANISM(S): Homo sapiens

PROVIDER: GSE79548 | GEO | 2017/01/01

SECONDARY ACCESSION(S): PRJNA316142

REPOSITORIES: GEO

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Gene expression profiling of KSHV-infected periodontal ligament cells

Project description:We reported the potential and mechnism of oral mesenchymal stem cell to become Kaposi Sarcoma progenitor cell. Human periodontal ligament cells were infected for 48 hours and 96 hours, then subjected to RNA extraction and sequencing. We found that KSHV-infected PDLSC shared a better similarity with KS biosies in cytokine production, including chemotaxis, angiogenesis, inflammation and differentiation. Furthermore, infection of PDLSC upregulated a spectum of genes involving mesenchymal-to-endothelial differentiation, a process which has been revealed in KS spindle cells. This study reveals the potential and mechnism in which oral mesenchymal stem cell is transformed by KSHV to KS progenitor cell.

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Project description:The Kaposi sarcoma-associated herpesvirus (KSHV) is the causative agent of Kaposi sarcoma (KS), the most common HIV/AIDS-associated tumor worldwide. Transmission routes of KSHV in the general population are poorly understood. Whereas sexual transmission appears to be common in homosexual men, the evidence for heterosexual transmission is less convincing. In fact, KSHVDNA sequences have been detected in the prostate, semen, and in the female genital tract. Persistent infection with high-risk human papillomavirus (HPV) is the major risk factor and is a requirement for the development of cervical cancer. However, it remains unknown the interaction between KSHV and HPV, and the contribution of KSHV to cervical cancer development and pathogenesis. In the present study, we used Illumina microarray to detect the global gene profile altered in KSHV-infected siHa cervical cancer cell-line containing integrated HPV16 genome.

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Project description:Collectively, viruses are the principal cause of cancers arising in patients with immune dysfunction, including HIV+ patients. Kaposi’s Sarcoma (KS) etiologically linked to KSHV continues to be the most common AIDS-associated tumor. The involvement of oral cavity represents one of the most common clinical manifestations of this tumor. HIV infection incurs an increased risk for periodontal diseases and oral carriage from a variety of pathogenic bacteria. In the current study, by using 16S rRNA based pyrosequencing, we found that oral shedding of KSHV altered oral microbiota signature in HIV+ patients which may contribute to virus-associated malignancies development.

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Project description:The Kaposiâs Sarcoma-associated Herpesvirus (KSHV) is the etiologic agent of several human cancers, including Kaposiâs Sarcoma (KS), which preferentially arise in immunocompromised patients but lack of effective therapeutic options. We have previously shown that KSHV or viral protein LANA can upregulate the glycoprotein CD147 (Emmprin) to induce primary endothelial cell invasiveness, which also requires PI3K/Akt and MAPK activation of VEGF production. In the current study, we first time identify the global network controlled by CD147 in KSHV-infected endothelial cells using Illumina microarray analysis. Among these downstream genes, ADAMTS1 and 9, two specific metalloproteases are strongly expressed in AIDS-KS tissues and contributed to KSHV-infected cell invasiveness through regulation of related cytokines production and respective receptors expression. By using a nude mice KS-like model, we found that targeting CD147 and downstream ADAMTSs proteins significantly suppressed KSHV-related tumorigenesis in vivo, which is potentially through impairing extracellular matrix (ECM) formation in tumor microenvironment. Taken together, we think that targeting CD147 and related proteins may represent a promising therapeutic strategy against KSHV-related malignancies. HUVEC cells were infected by KSHV or transduced by a CD147 recombinant adenoviral vector and the gene expression signature was compared to respective controls

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Project description:We have reported that KSHV infection reprograms oral mesenchymal stem cells (MSCs) and transforms them to Kaposi sarcoma-like cells through mesenchymal-to-endothelial transition. To explore the mechanism of KSHV infection of MSCs, we compared the gene expression profiles of Kaposi’s sarcoma tissue and KSHV non-susceptible cells to explore potential host factors that contribute to KSHV infection.

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Single-cell analysis of Kaposi’s sarcoma-associated herpesvirus infection in three-dimensional air-liquid interface culture model

Project description:The oral cavity has previously been identified as the major site for transmission of Kaposi’s sarcoma-associated herpesvirus (KSHV), but how KSHV establishes infection and replication in the oral epithelia remains unclear. Here, we report a KSHV spontaneous lytic replication model using fully differentiated, three-dimensional (3D) oral epithelial organoids at an air-liquid interface (ALI). This model revealed that KSHV infected the oral epithelia when the basal epithelial cells were exposed by damage. Unlike two-dimensional (2D) cell culture, 3D oral epithelial organoid ALI culture allowed high levels of spontaneous KSHV lytic replication, where lytically replicating cells were enriched at the superficial layer of epithelial organoid. Single cell RNA sequencing (scRNAseq) showed that KSHV infection induced drastic changes of host gene expression in infected as well as uninfected cells at the different epithelial layers, resulting in altered epithelial differentiation and morphogenesis. Moreover, we identified a unique population of infected cells containing lytic gene expression at the KSHV K2-K5 gene locus and distinct host and viral gene expression compared to latency or lytic replication. This study demonstrates an in vitro 3D epithelial organoid ALI culture model that recapitulates KSHV infection in the oral cavity, where KSHV undergoes the epithelial differentiation-dependent spontaneous lytic replication with a unique cell population carrying distinct viral gene expression.

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CD147 and downstream ADAMTSs promote the tumorigenesis of Kaposi sarcoma-associated herpesvirus

Project description:The Kaposi’s Sarcoma-associated Herpesvirus (KSHV) is the etiologic agent of several human cancers, including Kaposi’s Sarcoma (KS), which preferentially arise in immunocompromised patients but lack of effective therapeutic options. We have previously shown that KSHV or viral protein LANA can upregulate the glycoprotein CD147 (Emmprin) to induce primary endothelial cell invasiveness, which also requires PI3K/Akt and MAPK activation of VEGF production. In the current study, we first time identify the global network controlled by CD147 in KSHV-infected endothelial cells using Illumina microarray analysis. Among these downstream genes, ADAMTS1 and 9, two specific metalloproteases are strongly expressed in AIDS-KS tissues and contributed to KSHV-infected cell invasiveness through regulation of related cytokines production and respective receptors expression. By using a nude mice KS-like model, we found that targeting CD147 and downstream ADAMTSs proteins significantly suppressed KSHV-related tumorigenesis in vivo, which is potentially through impairing extracellular matrix (ECM) formation in tumor microenvironment. Taken together, we think that targeting CD147 and related proteins may represent a promising therapeutic strategy against KSHV-related malignancies.

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