Project description:Long noncoding RNAs (lncRNAs) play important roles in the tumorigenesis and metastasis of colorectal cancer (CRC). This study used a lncRNA microarray to analyze the aberrant lncRNA expression profiles in CRC tissues compared with paired adjacent normal tissues as well as CRC with regional lymph nodes metastasis compared with CRC without regional lymph nodes metastasis.
Project description:The survival rate of colorectal liver metastases remains low. Long noncoding lncRNAs is emerging as a novel class of master regulators of cell invasion and metastasis. In this study, analysis of the lncRNA expression dynamics in the colorectal liver metastases, primary colorectal tumor and normal tissues led to the identification of the metastasis-specific expression of a set of lncRNAs including CRLM1. CRLM1 inhibited apoptosis and promoted metastasis and invasion of colorectal cancer cells, and also promoted tumor growth in nude mice. CRLM1 weakly associated with chromatin regions of genes involved in cell adhesion and DNA damage, correlated with CRLM1-regulated gene expression bidirectionally. CRLM1 physically interacts with and promotes the nuclear localization of the metastasis protein hnRNPK. CRLM1 effectively promotes hnRNPK promoter occupancy, and co-regulate gene expression. These findings suggest a potential biomarker and druggable target for treatment of colorectal liver metastases.
Project description:The survival rate of colorectal liver metastases remains low. Long noncoding lncRNAs is emerging as a novel class of master regulators of cell invasion and metastasis. In this study, analysis of the lncRNA expression dynamics in the colorectal liver metastases, primary colorectal tumor and normal tissues led to the identification of the metastasis-specific expression of a set of lncRNAs including CRLM1. CRLM1 inhibited apoptosis and promoted metastasis and invasion of colorectal cancer cells, and also promoted tumor growth in nude mice. CRLM1 weakly associated with chromatin regions of genes involved in cell adhesion and DNA damage, correlated with CRLM1-regulated gene expression bidirectionally. CRLM1 physically interacts with and promotes the nuclear localization of the metastasis protein hnRNPK. CRLM1 effectively promotes hnRNPK promoter occupancy, and co-regulate gene expression. These findings suggest a potential biomarker and druggable target for treatment of colorectal liver metastases.
Project description:The survival rate of colorectal liver metastases remains low. Long noncoding lncRNAs is emerging as a novel class of master regulators of cell invasion and metastasis. In this study, analysis of the lncRNA expression dynamics in the colorectal liver metastases, primary colorectal tumor and normal tissues led to the identification of the metastasis-specific expression of a set of lncRNAs including CRLM1. CRLM1 inhibited apoptosis and promoted metastasis and invasion of colorectal cancer cells, and also promoted tumor growth in nude mice. CRLM1 weakly associated with chromatin regions of genes involved in cell adhesion and DNA damage, correlated with CRLM1-regulated gene expression bidirectionally. CRLM1 physically interacts with and promotes the nuclear localization of the metastasis protein hnRNPK. CRLM1 effectively promotes hnRNPK promoter occupancy, and co-regulate gene expression. These findings suggest a potential biomarker and druggable target for treatment of colorectal liver metastases.
Project description:The survival rate of colorectal liver metastases remains low. Long noncoding lncRNAs is emerging as a novel class of master regulators of cell invasion and metastasis. In this study, analysis of the lncRNA expression dynamics in the colorectal liver metastases, primary colorectal tumor and normal tissues led to the identification of the metastasis-specific expression of a set of lncRNAs including CRLM1. CRLM1 inhibited apoptosis and promoted metastasis and invasion of colorectal cancer cells, and also promoted tumor growth in nude mice. CRLM1 weakly associated with chromatin regions of genes involved in cell adhesion and DNA damage, correlated with CRLM1-regulated gene expression bidirectionally. CRLM1 physically interacts with and promotes the nuclear localization of the metastasis protein hnRNPK. CRLM1 effectively promotes hnRNPK promoter occupancy, and co-regulate gene expression. These findings suggest a potential biomarker and druggable target for treatment of colorectal liver metastases.
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.
Project description:The purpose of this study is to identify lncRNAs involved in the pathology of colorectal cancer (CRC) liver metastasis and investigate their underlying mechanisms. A total of 439 miRNAs were identified to be differentially expressed between 7 primary CRC tissues with liver metastases and 8 CRC tissues without liver metastases from 15 patients by Arraystar lncRNA microarrays
Project description:Liver cancer is one of the most common malignant tumors in the world and metastasis is the leading cause of death associated with liver cancer. Hypoxia is a common feature of solid tumors and enhances malignant character of cancer cells. However, the exact mechanisms involved in hypoxia-driven liver cancer progression and metastasis have not been well clarified so far. The aim of this study was to investigate the contribution of long non-coding RNA (lncRNA) in hypoxia promoting liver cancer progression. We screened and revealed LINC00839 as a novel hypoxia-responsive lncRNA in liver cancer. LINC00839 expression was up-regulated in liver cancer tissues and cell lines, and the patients with high LINC00839 expression had shortened overall survival. LINC00839 further overexpressed under hypoxia and promoted liver cancer cell proliferation, migration, and invasion. Mechanistically, LINC00839 bound multiple proteins that were primarily associated with the metabolism and RNA transport, and positively regulated the expression of Formin-like protein 2 (FMNL2). LINC00839 could promote hypoxia-mediated liver cancer progression, suggesting it may be a clinically valuable biomarker and serve as a molecular target for the diagnosis, prognosis, and therapy of liver cancer.
Project description:LncRNA and mRNA expression profiling for 7 human gastric cancr samples (3 tumor tissues and 3 tumor lymph node and 1 normal tissue) We have completed the metastasis-related Long Noncoding RNA expression profiling data microarray analysis of the 7 human gastric cancer related samples In the study presented here, a consecutively operated, well-defined cohort of three gastric cancer tissues and three metastatic lymph nodes tissues compared with the normal tissues and lymph nodes tissues, followed up more than five years, was used to acquire expression profiles of a total of 1942 lncRNA and 1976 mRNA, leading to the successful construction of supervised
Project description:Analysis of changes in gene expression of long noncoding RNAs under hypoxia in lung cancer cells by using microarray-based profiling assay Hypoxia plays important roles in cancer progression by inducing angiogenesis, metastasis, and drug resistance. However, the effects of hypoxia on long noncoding RNA (lncRNA) expression have not been clarified. In this study, we evaluated alterations in lncRNA expression in lung cancer cells under hypoxic conditions using lncRNA microarray analyses. Among 40,173 lncRNAs, 211 and 113 lncRNAs were up- and downregulated, respectively, in both A549 and NCI-H460 cells. Genome-wide profiling of lncRNA expression altered under hypoxia may provide a basis for understanding the role of hypoxia-regulated lncRNAs in cancer growth and metastasis under hypoxic conditions as well as the mechanism underlying hypoxia-induced expression of lncRNAs.