Project description:transcriptome profiling of zebrafish liver tumors comparing with healthy liver tissues Zebrafish liver tumors were induced by exposure to 7,12-dimethylbenz(α)anthracene (DMBA). 5 zebrafish liver tumors and 6 healthy zebrafish livers were used to detect gene signatures in zebrafish liver tumors. A mixture of the 11 total RNA samples was used as the common reference.
Project description:To study the characteristics and mechanisms of Myc-induced zebrafish liver tumor, next-generation sequencing-based SAGE analyses were used to examine the transcriptomes of tumor and control samples. The results indicated that ribosome proteins were overwhelmingly up-regulated in the Myc-induced liver tumors. Cross-species analyses showed that the zebrafish Myc model correlated well with Myc transgenic mouse models for liver cancers. The Myc-induced zebrafish liver tumors also possessed molecular signatures highly similar to human hepatocellular carcinoma (HCC). Thus, our zebrafish model demonstrated the conserved role of Myc in promoting hepatocarcinogenesis in all vertebrate species.
Project description:To study the characteristics and mechanisms of Myc-induced zebrafish liver tumor, next-generation sequencing-based SAGE analyses were used to examine the transcriptomes of tumor and control samples. The results indicated that ribosome proteins were overwhelmingly up-regulated in the Myc-induced liver tumors. Cross-species analyses showed that the zebrafish Myc model correlated well with Myc transgenic mouse models for liver cancers. The Myc-induced zebrafish liver tumors also possessed molecular signatures highly similar to human hepatocellular carcinoma (HCC). Thus, our zebrafish model demonstrated the conserved role of Myc in promoting hepatocarcinogenesis in all vertebrate species. Transcriptome profiling of tumor samples (M+D+) and control samples (M-D-, M+D-, M-D+) were generated by deep sequencing, each in duplicates, using 3' RNA-SAGE on the SOLiD system.
Project description:Zebrafish has been advocated as a cancer model, but little is known about the molecular similarities between zebrafish and human tumors. Comparative analysis of microarray data from zebrafish liver tumors with those from four human tumor types revealed molecular conservation at various levels between fish and human tumors. This approach provides a useful strategy for identifying expression signature that is strongly associated with a disease phenotype. Keywords: Diseased vs normal.
Project description:To compare the characteristics and mechanisms of Myc and xmrk induced zebrafish liver tumor, next generation sequencing-based SAGE analyses were used to examine the transcriptomes of tumor and control samples. The results indicated that relatively small overlaps of significantly deregulated genes and biological pathways among different zebrafish liver tumor models.Nevertheless, they all significantly correlate with advanced or very advanced human hepatocellular carcinoma (HCC). Molecular signature from each oncogene-induced zebrafish liver tumor correlated with only a small subset of human HCC samples, and they share conserved up-regulated pathways. A short list of commonly deregulated genes among different zebrafish liver tumors showed accordant deregulation in the majority of human HCCs, suggesting that they may serve as common diagnosis markers and therapeutic targets.Thus, these transgenic zebrafish models with well-defined oncogene-induced tumors are valuable tools for molecular classification of human HCCs and for understanding of molecular drivers in hepatocarcinogenesis in each human HCC subgroup.
Project description:To compare the characteristics and mechanisms of Myc and xmrk induced zebrafish liver tumor, next generation sequencing-based SAGE analyses were used to examine the transcriptomes of tumor and control samples. The results indicated that relatively small overlaps of significantly deregulated genes and biological pathways among different zebrafish liver tumor models.Nevertheless, they all significantly correlate with advanced or very advanced human hepatocellular carcinoma (HCC). Molecular signature from each oncogene-induced zebrafish liver tumor correlated with only a small subset of human HCC samples, and they share conserved up-regulated pathways. A short list of commonly deregulated genes among different zebrafish liver tumors showed accordant deregulation in the majority of human HCCs, suggesting that they may serve as common diagnosis markers and therapeutic targets.Thus, these transgenic zebrafish models with well-defined oncogene-induced tumors are valuable tools for molecular classification of human HCCs and for understanding of molecular drivers in hepatocarcinogenesis in each human HCC subgroup. Transcriptome profiling of Myc tumor sample (X-M+D+) and control samples (X-M-D-, X-M+D-, X-M-D+), xmrk tumor sample (X+M-D+) and control samples (X-M-D-, X+M-D-, X-M-D+), were generated by deep sequencing, using 3' RNA-SAGE on SOLiD system
Project description:Using a pooled (n=10) zebrafish liver DNA, we generated base-resolution DNA methylation maps to document epigenetic landscape in zebrafish genome. Here we generated single-nucleotide resoultion DNA methylation map of zebrafish pooled liver sample using Reduced Representation Bisulfite Sequencing (RRBS)
Project description:The identification of cancer drivers is a major goal of current cancer research. Finding driver genes within large chromosomal events is especially challenging because such alterations encompass many genes. Previously, we demonstrated that zebrafish malignant peripheral nerve sheath tumors (MPNSTs) are highly aneuploid, much like human tumors. In this study, we examined 147 zebrafish MPNSTs by massively parallel sequencing and identified both large and focal copy number alterations (CNAs). Given the low degree of conserved synteny between fish and mammals, we reasoned that comparative analyses of CNAs from fish versus human MPNSTs would enable elimination of a large proportion of passenger mutations, especially on large CNAs. Accordingly, we found less than one third of the human CNA genes were co-gained or co-lost in zebrafish, dramatically narrowing the list of candidate cancer drivers for both focal and large CNAs. We conclude that zebrafish-human comparative analysis represents a powerful, and broadly applicable, tool to enrich for evolutionarily conserved cancer drivers. --- This filing comprises data related to GEO entry GSE23666 ("Highly Aneuploid Zebrafish Malignant Peripheral Nerve Sheath Tumors have Genetic Alterations Similar to Human Cancers"), representing a followup study. 147 pairs of zebrafish (Danio rerio) tumor (MPNST) and normal tail control samples