PRSS8 Suppresses Colorectal Carcinogenesis and Metastasis.
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE115566 | GEO | 2019/06/01
REPOSITORIES: GEO
Similar Datasets
Project description:PRSS8 Suppresses Colorectal Carcinogenesis and Metastasis.
| PRJNA475479 | ENA
Project description:The purpose of this study is to identify miRNAs involved in the pathology of colorectal cancer (CRC) liver metastasis and investigate their underlying mechanisms. A total of 39 miRNAs were identified to be differentially expressed between 16 primary CRC tissues with liver metastases and 16 CRC tissues without liver metastases from 32 patients by Affymetric miRNA microarrays. 16 coloretcal cancer tissues with liver metastasis and 16 colorectal cancer tissues without liver metastasis were included in this study for RNA extraction and hybridization on Affymetrix microarrays. We sought to identify the differentially expressed miRNAs between colorectal cancer tissues with and without liver metastasis.
2013-12-10 | E-GEOD-53159 | biostudies-arrayexpress
Project description:Tumor-initiating cells with reprogramming plasticity and/or de-differentiation attributes have been thought to initiate primary tumor development as well as to regenerate secondary tumors in metastatic organs; however, the molecular mechanisms are not fully understood. We previously found that breast tumor-initiating cell marker, CD44, directs multicellular aggregation and cluster formation of circulating tumor cells (CTCs), which further enhance stemness and survival of such cells, enabling metastatic colonization to the lungs. To further elucidate the molecular network underlying CTC cluster formation, we performed global proteomic profiling and discovered that the tetraspanin protein CD81, which is normally enriched in exosomes (small extracellular vesicles), is a new driver of cancer initiation and metastasis as a facilitator and target of CD44. Loss of CD81 compromises tumorigenicity and mammosphere formation of triple negative breast cancer (TNBC) cells. Assisted by machine learning-based algorithms and mutagenesis approach, we found that CD81 interacts with CD44 on the cellular membrane through their extracellular regions. Notably, genetic knockout of CD44 or CD81 results in loss of both CD81 and CD44 in secreted exosomes, a state which abolishes exosome-induced self-renewal of recipient cells, such as mammosphere formation. In addition, RNA sequencing analysis showed that CD81 knockdown up-regulates expression of a cell differentiation marker, SEMA7a, whose down-regulation partially rescues mammosphere formation inhibition by CD81 depletion. Clinically, CD81 expression was observed in >80% of CTCs and specifically enriched and co-expressed along with CD44 in clustered CTCs of breast cancer patients. Mimicing the phenotypes of CD44 deficiency, loss of CD81 also inhibited tumor cell aggregation and lung metastasis of TNBC in both human and mouse tumor models, supporting the clinical significance of CD81 in association with patient outcomes. Our study highlights a new driving role of CD81 in cancer exosome-induced stemness, clustered CTCs, and metastasis initiation of TNBC, reported for the first time to our knowledge.
2022-10-18 | PXD029529 | JPOST Repository
Project description:The purpose of this study is to identify miRNAs involved in the pathology of colorectal cancer (CRC) liver metastasis and investigate their underlying mechanisms. A total of 39 miRNAs were identified to be differentially expressed between 16 primary CRC tissues with liver metastases and 16 CRC tissues without liver metastases from 32 patients by Affymetric miRNA microarrays.
2013-12-10 | GSE53159 | GEO
Project description:Abstract:
Accumulating experimental and clinical evidence suggest that the immune response to cancer is not exclusively anti-tumor. Indeed, the pro-tumor roles of the immune system - as suppliers of growth and pro-angiogenic factors or defenses against cytotoxic immune attacks, for example - have been long appreciated, but relatively few theoretical works have considered their effects. Inspired by the recently proposed "immune-mediated" theory of metastasis, we develop a mathematical model for tumor-immune interactions at two anatomically distant sites, which includes both anti- and pro-tumor immune effects, and the experimentally observed tumor-induced phenotypic plasticity of immune cells (tumor "education" of the immune cells). Upon confrontation of our model to experimental data, we use it to evaluate the implications of the immune-mediated theory of metastasis. We find that tumor education of immune cells may explain the relatively poor performance of immunotherapies, and that many metastatic phenomena, including metastatic blow-up, dormancy, and metastasis to sites of injury, can be explained by the immune-mediated theory of metastasis. Our results suggest that further work is warranted to fully elucidate the pro-tumor effects of the immune system in metastatic cancer.
2024-09-02 | BIOMD0000000926 | BioModels
Project description:In cancer patients, metastasis of tumors to sentinel lymph nodes (LN) predicts disease progression and often guides treatment decisions. The mechanisms underlying tumor LN metastasis are poorly understood. Using comparative transcriptomics and metabolomics analyses of primary and LN metastatic tumors in mice, we found that LN metastasis requires that tumor cells undergo a metabolic shift toward fatty acid oxidation (FAO). Transcriptional co-activator yes-associated protein (YAP) is selectively activated in LN metastatic tumors, leading to upregulation of genes in the FAO signaling pathway. Pharmacological inhibition of FAO or genetic ablation of YAP suppressed LN metastasis in mice. Several bioactive bile acids were highly accumulated in the LN metastatic tumor. Inhibition of FAO or YAP may merit exploration as therapeutic strategies for mitigating tumor LN metastasis.
2019-02-09 | E-MTAB-7621 | biostudies-arrayexpress
Project description:Despite being the standard of care for patients with Stage IV colorectal cancer (CRC), the effects of a resection of liver metastasis on the metastatic disease are poorly understood. To elucidate the influence of surgical metastasectomies on metastasized CRC, we investigated the cellular and molecular effects of partial hepatectomy in a mouse model of orthograde CRC liver metastasis.
2024-06-02 | GSE253251 | GEO
Project description:Lymph node metastasis(LNM) is the most common metastatic pathway of colorectal cancer (CRC), with a rate of 40.5% to 49.7%. Meanwhile, LNM also is one of the most important prognostic risk factor and often predicts a poor clinical outcome. Therefore, it is necessary to identify relevant genes or elucidate potential molecular mechanisms of LNM in order to develop effective prevention and treatment strategies. The aim of this study is to give an insight into the specific signatures and molecular mechanisms of lymph node metastasis in CRC.
2021-05-18 | GSE174519 | GEO
Project description:The skeleton is the most common metastasis site of breast cancer cells and the molecular underpinning of this process is incompletely understood. The tumor suppressor gene deleted in liver cancer-1 (DLC1) encodes a multi-domain protein including a RhoGTPase activating protein (RhoGAP) domain and has been reported to suppress the lung colonization of breast cancer cells. However, the role of DLC1 in breast cancer bone metastasis and the importance of RhoGAP-dependent and -independent pathways in this process remain unclear. Here, we showed that DLC1 silencing is linked to enhanced bone-tropism of breast cancer cell lines and poor prognosis of clinical samples. In the study presented here, DLC1 was overexpressed in the SCP2 breast cancer cells, and the control SCP2 and overexpression cells were treated with TGFbeta. Microarray profiling of mRNA levels was performed in the control and overexpression cells with or without TGFbeta treatment.
2013-12-19 | E-GEOD-46214 | biostudies-arrayexpress
Project description:Methylthioacetic acid (MTA) is thought to potentially have an anticancer activity because it promotes the differentiation of unorganized cell mass into dome tissues in RCM-1 human colorectal cancer cell line. To elucidate a molecular mechanism underlying MTA-mediated dome formation, we used microarrays to disclose the global changes in gene expression caused by MTA and define the candidate genes involved in this phenomenon.
2020-10-23 | GSE139279 | GEO