Project description:The total RNAs were immunoprecipitated with anti-N6-methyadenosine (m6A) antibody. The modified RNAs were eluted from the immunoprecipitated magnetic beads as the “IP”. The unmodified RNAs were recovered from the supernatant as “Sup”. The “IP” and “Sup” RNAs were labeled with Cy5 and Cy3 respectively as cRNAs in separate reactions using Arraystar Super RNA Labeling Kit. The cRNAs were combined together and hybridized onto Arraystar Human mRNA&lncRNA Epitranscriptomic Microarray (8x60K, Arraystar). After washing the slides, the arrays were scanned in two-color channels by an Agilent Scanner G2505C.
Project description:Lung adenocarcinoma (LUAD) is the most common histological subtype of lung cancer and shows high morbidity and mortality rates as well as poor prognosis. However, there is still an urgent need to provide more effective biomarkers for the early diagnosis, prognosis and monitoring of LUAD. The Arraystar Human M6a-MRNA&lncRNA Epitranscriptomic microarray analysis was performed on six pairs of LUAD tissues and adjacent non-tumor tissues to compare and screen the M6a marker of LUAD, thus may offer a new avenue of targets and strategies for LUAD diagnosis and treatment.
Project description:During the past decade, increasing evidence has shown that lncRNAs play important roles in oncogenesis and tumor suppression; however, the roles of lncRNAs in RCC are poorly understood. To address this issue, we used Agilent human lncRNA microarray chips and bioinformatics tools to assess lncRNA expression in 5 pairs of RCC tissues. A dysregulated lncRNA expression profile was identified by microarray and verified by qRT-PCR in 60 pairs of renal cell carcinoma.
Project description:Both N6-methyladenosine (m6A) mediates RNA fates and ubiquitin mediates protein fates play an important role in either physiology or pathology including cancer, yet how long noncoding RNAs (lncRNAs) are involved in a link of molecular fate between m6A and ubiquitin remains unknown. Here, we reveal a role for a lncRNA Downregulated RNA in Cancer (DRAIC) to suppress tumor growth and metastasis in clear cell Renal Carcinoma (ccRCC). Mechanistically, DRAIC physically interacts with heterogeneous nuclear ribonucleoprotein A2B1 (hnRNPA2B1) and enhances its protein stability by blocking E3 ligase F-box protein 11 (FBXO11)-mediated ubiquitin and proteasome-dependent degradation. Subsequently, hnRNPA2B1 destabilizes m6A modified-type 1 insulin-like growth factor receptor (IGF1R) to lead to inhibition of ccRCC progression. Moreover, four m6A modification sites of IGF1R are identified and results in its mRNA degradation. Collectively, our findings reveal that DRAIC/hnRNPA2B1 axis regulates IGF1R mRNA expression in an m6A-dependent manner and highlights an important mechanism of IGF1R fate. These findings shed light on DRAIC/hnRNPA2B1/FBXO11/IGF1R axis as potential therapeutic targets in ccRCC and build a link of molecular fate between m6A-modified RNA and ubiquitin-modified protein.
Project description:To further investigate the effect of high-fat diet on m6A modified expression profiles of mouse sperm RNA, we used whole-genome microarray expression profiles as a discovery platform to identify differential m6A modified genes under high-fat diet exposure. Male mice were fed normal chow (C) or 60% high-fat diet (HFD) from 5 weeks to 15 weeks old, and then sperm were obtained for Arraystar m6A-mRNA&lncRNA Epitranscriptomic Microarray. Results showed that hyper-methylated mRNAs were involved in multiple biological processes, including the "reproductive process," "gamete generation," and "spermatogenesis".
Project description:XIST is a long non-coding RNA (lncRNA) that mediates transcriptional silencing of X chromosome genes. Here we show that XIST is highly methylated with at least 78 N6-methyladenosine (m6A) residues, a reversible base modification whose function in lncRNAs is unknown. We show that m6A formation in XIST, as well as cellular mRNAs, is mediated by RBM15 and its paralog RBM15B, which bind the m6A-methylation complex and recruit it to specific sites in RNA. This results in methylation of adenosines in adjacent m6A consensus motifs. Furthermore, knockdown of RBM15 and RBM15B, or knockdown of the m6A methyltransferase METTL3 impairs XIST-mediated gene silencing. A systematic comparison of m6A-binding proteins shows that YTHDC1 preferentially recognizes m6A in XIST and is required for XIST function. Additionally, artificial tethering of YTHDC1 to XIST rescues XIST-mediated silencing upon loss of m6A. These data reveal a pathway of m6A formation and recognition required for XIST-mediated transcriptional repression. Three to four biological HEK293T replicates were used to perform iCLIP of endogenous YTH proteins, RBM15, and RBM15B. Crosslinking induced truncations were identified using CIMS-CITS pipeline.
Project description:Both N6-methyladenosine (m6A) mediates RNA fates and ubiquitin mediates protein fates play an important role in either physiology or pathology including cancer, yet how long noncoding RNAs (lncRNAs) are involved in a link of molecular fate between m6A and ubiquitin remains unknown. Here, we reveal a role for a lncRNA Downregulated RNA in Cancer (DRAIC) to suppress tumor growth and metastasis in clear cell Renal Carcinoma (ccRCC). Mechanistically, DRAIC physically interacts with heterogeneous nuclear ribonucleoprotein A2B1 (hnRNPA2B1) and enhances its protein stability by blocking E3 ligase F-box protein 11 (FBXO11)-mediated ubiquitin and proteasome-dependent degradation. Subsequently, hnRNPA2B1 destabilizes m6A modified-type 1 insulin-like growth factor receptor (IGF1R) to lead to inhibition of ccRCC progression. Moreover, four m6A modification sites of IGF1R are identified and results in its mRNA degradation. Collectively, our findings reveal that DRAIC/hnRNPA2B1 axis regulates IGF1R mRNA expression in an m6A-dependent manner and highlights an important mechanism of IGF1R fate. These findings shed light on DRAIC/hnRNPA2B1/FBXO11/IGF1R axis as potential therapeutic targets in ccRCC and build a link of molecular fate between m6A-modified RNA and ubiquitin-modified protein.
Project description:Both N6-methyladenosine (m6A) mediates RNA fates and ubiquitin mediates protein fates play an important role in either physiology or pathology including cancer, yet how long noncoding RNAs (lncRNAs) are involved in a link of molecular fate between m6A and ubiquitin remains unknown. Here, we reveal a role for a lncRNA Downregulated RNA in Cancer (DRAIC) to suppress tumor growth and metastasis in clear cell Renal Carcinoma (ccRCC). Mechanistically, DRAIC physically interacts with heterogeneous nuclear ribonucleoprotein A2B1 (hnRNPA2B1) and enhances its protein stability by blocking E3 ligase F-box protein 11 (FBXO11)-mediated ubiquitin and proteasome-dependent degradation. Subsequently, hnRNPA2B1 destabilizes m6A modified-type 1 insulin-like growth factor receptor (IGF1R) to lead to inhibition of ccRCC progression. Moreover, four m6A modification sites of IGF1R are identified and results in its mRNA degradation. Collectively, our findings reveal that DRAIC/hnRNPA2B1 axis regulates IGF1R mRNA expression in an m6A-dependent manner and highlights an important mechanism of IGF1R fate. These findings shed light on DRAIC/hnRNPA2B1/FBXO11/IGF1R axis as potential therapeutic targets in ccRCC and build a link of molecular fate between m6A-modified RNA and ubiquitin-modified protein.