Integrative genomic and epigenetic analysis in cholangiocarcinoma
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE89749 | GEO | 2017/07/03
SECONDARY ACCESSION(S): PRJNA353080
REPOSITORIES: GEO
Similar Datasets
Project description:Analysis of gene expression in cholangiocarcinoma patients. Please download the supplementary file GSE89748_CCA_batch02_illumina_Gene_expression_noNorm_noBKGD.txt.gz (link below) to obtain gene expression matrix with sample IDs used in the publication.
2017-07-03 | GSE89748 | GEO
Project description:Analysis of gene expression in cholangiocarcinoma patients. Please download the supplementary file GSE89747_CCA_batch01_illumina_Gene_expression_noNorm_noBKGD.txt.gz (link below) to obtain gene expression matrix with sample IDs used in the publication.
2017-07-03 | GSE89747 | GEO
Project description:Cholangiocarcinoma (CCA) is an aggressive malignancy of the bile ducts, with poor prognosis and limited treatment options. Here, we describe the integrated analysis of somatic mutations, RNA expression, copy number, and DNA methylation by The Cancer Genome Atlas of a set of predominantly intrahepatic CCA cases and propose a molecular classification scheme. We identified an IDH mutant-enriched subtype with distinct molecular features including low expression of chromatin modifiers, elevated expression of mitochondrial genes, and increased mitochondrial DNA copy number. Leveraging the multi-platform data, we observed that ARID1A exhibited DNA hypermethylation and decreased expression in the IDH mutant subtype. More broadly, we found that IDH mutations are associated with an expanded histological spectrum of liver tumors with molecular features that stratify with CCA. Our studies reveal insights into the molecular pathogenesis and heterogeneity of cholangiocarcinoma and provide classification information of potential therapeutic significance.
| S-EPMC5493145 | biostudies-literature
Project description:As genomic analysis technology has advanced, it has become possible to sub-classify intrahepatic cholangiocarcinoma (ICC) at the histological or molecular level. Here, we verify the recently suggested two subgroups of ICC in the organoids model, compare the characteristics between types. ICC patients are subclassified into small-duct (SD) and large-duct (LD) subtype according to histological characteristics. ICC organoids are established, and unsupervised principal component analysis clustering separates each type of ICC. Differential gene expression reveals enrichment on KRAS, TGFβ and ERBB2 signaling pathways in LD-type compared with SD-type (P < 0.05). Gene set enrichment analysis demonstrates that the cholangiocarcinoma class 2 signature, defined by Andersen et al., is enriched in the LD-type (enrichment Score = 2.19, P < 0.001). A protein-protein interaction network analysis identifies ZNF217 as a significant hub protein (odds ratio = 4.96, P = 0.0105). We perform prospective modeling of histological subtype using patient-derived organoids. Moreover, gene expression profiling of ICC organoids enables identification of type-specific targetable pathways.
| S-EPMC9842736 | biostudies-literature
Project description:Integrative genomic and epigenetic analysis in cholangiocarcinoma
| PRJNA353080 | ENA
Project description:BACKGROUND & AIMS: Cholangiocarcinoma, the second most common liver cancer, can be classified as intrahepatic (ICC) or extrahepatic. We performed an integrative genomic analysis of ICC samples from a large series of patients. METHODS: We performed gene expression profile, high-density single nucleotide polymorphism array, and mutation analyses using formalin-fixed ICC samples from 149 patients. Associations with clinico-pathological traits and patient outcomes were examined for 119 cases. Class discovery was based on a non-negative matrix factorization algorithm and significant copy number variations (CNV) were identified by GISTIC analysis. Gene set enrichment analysis was used to identify signaling pathways activated in specific molecular classes of tumors, and to analyze their genomic overlap with hepatocellular carcinoma (HCC). RESULTS: We identified 2 main biological classes of ICC. The inflammation class (38% of ICCs) is characterized by activation of inflammatory signaling pathways, overexpression of cytokines, and STAT3 activation. The proliferation class (62%) is characterized by activation of oncogenic signaling pathways (including RAS, mitogen-activated protein kinase, and MET), DNA amplifications at 11q13.2, deletions at 14q22.1, mutations in KRAS and BRAF, and gene expression signatures previously associated with poor outcomes for patients with HCC. CNV-based clustering was able to further refine these molecular groups. We identified high-level amplifications in 5 regions, including 1p13 (9%) and 11q13.2 (4%), and several focal deletions, such as 9p21.3 (18%) and 14q22.1 (12% in coding regions for the SAV1 tumor suppressor). In a complementary approach, we identified a gene expression signature that was associated with reduced survival times of patients with ICC; this signature was enriched in the proliferation class (P<0.001). CONCLUSIONS: We used an integrative genomic analysis to identify 2 classes of ICC. The proliferation class has specific copy number alterations, many features of the poor-prognosis signatures for HCC, and is associated with worse outcome. Different classes of ICC, based on molecular features, might therefore require different treatment approaches. This SuperSeries is composed of the SubSeries listed below. Refer to individual Series
2013-01-24 | E-GEOD-33327 | biostudies-arrayexpress
Project description:The glycosylation landscape of Human cholangiocarcinoma (CCA), and how it affects CCA diagnosis and prognosis, has recently emerged as an appealing research field.In this study, we used chemical glycoproteomic analysis Click-iG for systematic profiling of intact glycopeptides in CCA and HIBEpiC cell lines.
2024-06-22 | PXD048188 | Pride
Project description:As genomic analysis technology has advanced, it has become possible to sub-classify intrahepatic cholangiocarcinoma (ICC) at the histological or molecular level. However, there are no truly representative models of ICC subtypes for use in studying developmental differences, carcinogenesis, and personalized drug response. Here, we sought to verify recent suggested two subgroup of ICC in organoids model, compare the characteristics between LD and SD type of ICC, and find the type-specific gene expression profile and targetable pathway as a therapeutic target. ICC organoids from 16 patients pathologically diagnosed with cholangiocarcinoma were prepared according to a previously established organoid culture protocol. ICC patients were subclassified into small-duct (SD) type and large-duct (LD) type according to histological characteristics and S100P, N-cadherin, and CD56 expression. ICC organoids were successfully established within one month and exhibited a morphology similar to that of their matching primary cancer. LD- and SD-type organoids exhibited histologic phenotypes and staining patterns characteristic of the corresponding ICC subtypes. ICC organoids showed high concordance of somatic mutations with primary tumors. Unsupervised principal component analysis clustering effectively separated each type of ICC. Differential gene expression revealed significant enrichment on KRAS, TGFβ and ERBB2 signaling pathways in LD-type compared with SD-type ICC (P<0.05). Gene set enrichment analysis further demonstrated that the cholangiocarcinoma class 2 signature, defined by Andersen et al., was significantly enriched in the LD-type (enrichment score=2.19, P<0.001). A protein-protein interaction network analysis identified ZNF217 as a significant hub protein (odds ratio=4.96, P=0.0105). We successfully performed prospective modeling of histological subtype specification using patient-derived ICC organoids. Moreover, gene expression profiling of ICC organoids enabled identification of type-specific targetable pathways.
2022-11-26 | GSE215997 | GEO
Project description:Objective: HIV-1 Nef suppresses immune surveillance mechanisms to promote viral pathogenesis. Cellular receptor CD4 is essential for HIV entry into host cells, though becomes problematic at later stages in the virus replication cycle. CD4 at the plasma membrane is targeted by Nef for endocytosis and lysosomal degradation via recruitment of clathrin adaptor complex 2 (AP2 complex). Our goal is to use cross-linking mass spectrometry and integrative modeling to aid in structure determination of flexible portions of the Nef-CD4-AP2 complex. Methods: We use disuccinimidyl sulfoxide (DSSO), a MS-cleavable, bifunctional amine-reactive small molecule, to cross-link proximal Lys residues or N-termini of a purified reconstituted Nef-CD4 C-terminal domain fusion protein bound to the AP2Δμ2-CTD complex. Cross-linked proteins were separated by SDS-PAGE, excised from the gel and digested with trypsin. The resulting peptides were analyzed by specialized LC-MS3 experiments for identification of cross-linked residues using MSconvert (to obtain individual MS2 and MS3 level mgf files), ProteinProspector (to obtain peptide identification results files), and XLTools (to identify cross-linked peptides from results, MS2, and MS3 files). Additional scripts were used to summarize cross-linked results. Results: We find that an intricate combination of conformational changes occurs in both Nef and AP2 to enable CD4 binding and downregulation. A pocket on Nef previously identified as crucial for recruiting class I MHC is also responsible for recruiting CD4, revealing a potential approach to inhibit two of Nef’s activities and sensitize the virus to immune clearance.
2021-09-09 | PXD019338 | Pride
Project description:This SuperSeries is composed of the SubSeries listed below.
2018-01-19 | GSE109361 | GEO