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Circular rna

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https://www.readbyqxmd.com/read/29786687/genome-wide-analysis-of-circular-rnas-in-bovine-cumulus-cells-treated-with-bmp15-and-gdf9
#1
Yao Fu, Hao Jiang, Jian-Bo Liu, Xu-Lei Sun, Zhe Zhang, Sheng Li, Yan Gao, Bao Yuan, Jia-Bao Zhang
Circular RNAs (circRNAs) are important members of the non-coding RNA family, and those relating to animal physiologies have been widely studied in recent years. This study aimed to explore the roles of circRNAs in the regulation of follicular development. We constructed four bovine cumulus cell cDNA libraries, including a negative control group (NC) and groups treated with BMP15, GDF9 and BMP15 + GDF9, and we sequenced the libraries on the Illumina HiSeq Xten platform. We identified 1706 circRNAs and screened for differential circRNA expression...
May 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29785877/hepatitis-b-virus-lymphotropism-emerging-details-and-challenges
#2
Shivali S Joshi, Carla S Coffin
The hepatitis B virus (HBV) is predominantly a hepatotropic virus but also infects cells of the lymphatic system. HBV genomes (DNA, messenger (m)RNA, covalently closed circular (ccc) DNA) and proteins have been found in extrahepatic sites such as peripheral blood mononuclear cells (PBMC), lymph nodes, spleen, bone marrow and cerebrospinal fluid. HBV entry into hepatocytes occurs by binding of the HBV preS1 surface protein to its specific receptor, the bile acid transporter, sodium taurocholate co-transporting polypeptide (NTCP)...
May 22, 2018: Biotechnology & Genetic Engineering Reviews
https://www.readbyqxmd.com/read/29785842/circular-rna-0068669-as-a-new-biomarker-for-hepatocellular-carcinoma-metastasis
#3
Ting Yao, Qingqing Chen, Zhouwei Shao, Zhihua Song, Liyun Fu, Bingxiu Xiao
BACKGROUND: Circular RNAs (circRNAs) play important roles in disease occurrence. However, the roles of circRNAs in the diagnosis of hepatocellular carcinoma (HCC) are largely unknown. The aim of this study is to investigate the clinical diagnostic values of hsa_circ_0068669 (Alias: hsa_circ_103561), one of the representative HCC-associated circRNAs. METHODS: Hsa_circ_0068669 expression levels in HCC tissues, HCC cell lines, and chronic hepatitis tissues were detected by real-time quantitative reverse transcription-polymerase chain reaction...
May 21, 2018: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/29785229/the-circular-rna-hsa_circ_0001445-regulates-the-proliferation-and-migration-of-hepatocellular-carcinoma-and-may-serve-as-a-diagnostic-biomarker
#4
Xianwei Zhang, Hu Zhou, Wei Jing, Ping Luo, Shili Qiu, Xuefang Liu, Man Zhu, Chunzi Liang, Mingxia Yu, Jiancheng Tu
Circular RNAs (circRNA), a class of noncoding RNAs, have been found to be involved in various diseases. Here, the expression levels of the circRNA hsa_circ_0001445 in 73 pairs of hepatocellular carcinoma (HCC) and adjacent nontumor tissues were investigated by quantitative real-time polymerase chain reaction (qRT-PCR). Our data demonstrate that the hsa_circ_0001445 levels were significantly decreased in HCC tissues ( P < 0.001) and markedly associated with the number of tumor foci ( P = 0.014). Furthermore, in vitro approaches showed that overexpression of hsa_circ_0001445 promoted apoptosis and inhibited proliferation, migration, and invasion of HCC-derived cells, suggesting that hsa_circ_0001445 might be involved in the development of HCC...
2018: Disease Markers
https://www.readbyqxmd.com/read/29785124/upregulation-of-circ_0066444-promotes-the-proliferation-invasion-and-migration-of-gastric-cancer-cells
#5
Dawei Rong, Chaoxi Dong, Kai Fu, Hanjin Wang, Weiwei Tang, Hongyong Cao
Background: Circular RNAs (circRNAs), which have closed-loop structure, are involved in the pathogenesis of human diseases including various types of carcinomas. The present study aimed to investigate the relationship between a new circular RNA named circ_0066444 and gastric cancer (GC) carcinogenesis. Materials and methods: The circ_0066444 levels in 106 paired gastric carcinoma tissues and related adjacent normal tissues were detected by real-time quantitative reverse-transcription polymerase chain reaction...
2018: OncoTargets and Therapy
https://www.readbyqxmd.com/read/29781033/microarray-analysis-of-circular-rna-expression-profiles-associated-with-gemcitabine-resistance-in-pancreatic-cancer-cells
#6
Chao Xu, Yue Yu, Fei Ding
Pancreatic cancer (PC) is one of the most malignant tumors of the digestive system due to its rapid progression, metastasis and resistance to chemotherapy. Gemcitabine (GEM) chemotherapy is the first‑choice treatment for advanced PC. However, the effect of GEM‑based chemotherapy on PC is limited due to the development of chemoresistance, and the molecular mechanisms underlying this resistance have yet to be investigated. Circular RNAs (circRNAs), which can function as microRNA sponges, have been found to be involved in the development of several types of cancer...
May 17, 2018: Oncology Reports
https://www.readbyqxmd.com/read/29775224/circular-rnas-are-differentially-expressed-in-liver-ischemia-reperfusion-injury-model
#7
Zhiqiang Ye, Qinglei Kong, Jianhua Han, Jingyi Deng, Miaolue Wu, Hong Deng
Liver ischemia/reperfusion (I/R) injury has high mortality due to the intense inflammatory process occurs in the liver. However, the pathological mechanism underlying I/R injury is still not clear. Recent works showed that circular RNAs play critical roles in many human diseases. In this study, the occurrence of liver I/R injury was validated by an analysis of the blood samples and hematoxylin-eosin (HE) staining of liver tissues. Total RNA was purified and followed by RNA-seq in the purpose of screening the circRNAs in significant differentially expression, which were validated by quantitative PCR...
May 18, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29773824/rnase-h-assisted-rna-primed-rolling-circle-amplification-for-targeted-rna-sequence-detection
#8
Hirokazu Takahashi, Masahiko Ohkawachi, Kyohei Horio, Toshiro Kobori, Tsunehiro Aki, Yukihiko Matsumura, Yutaka Nakashimada, Yoshiko Okamura
RNA-primed rolling circle amplification (RPRCA) is a useful laboratory method for RNA detection; however, the detection of RNA is limited by the lack of information on 3'-terminal sequences. We uncovered that conventional RPRCA using pre-circularized probes could potentially detect the internal sequence of target RNA molecules in combination with RNase H. However, the specificity for mRNA detection was low, presumably due to non-specific hybridization of non-target RNA with the circular probe. To overcome this technical problem, we developed a method for detecting a sequence of interest in target RNA molecules via RNase H-assisted RPRCA using padlocked probes...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29765512/dhx9-regulates-production-of-hepatitis-b-virus-derived-circular-rna-and-viral-protein-levels
#9
Kazuma Sekiba, Motoyuki Otsuka, Motoko Ohno, Takahiro Kishikawa, Mari Yamagami, Tatsunori Suzuki, Rei Ishibashi, Takahiro Seimiya, Eri Tanaka, Kazuhiko Koike
Hepatitis B virus (HBV) infection, which is a major health concern worldwide, can lead to liver cirrhosis and hepatocellular carcinoma. Although current nucleos(t)ide analogs efficiently inhibit viral reverse transcription and viral DNA load clinically, episomal viral covalently closed circular DNA (cccDNA) minichromosomes and transcripts from cccDNA continue to be expressed over the long term. We hypothesized that, under these conditions, viral transcripts may have biological functions involved in pathogenesis...
April 20, 2018: Oncotarget
https://www.readbyqxmd.com/read/29764361/ouroboros-resembling-competitive-endogenous-loop-orcel-in-circular-rnas-revealed-through-transcriptome-sequencing-dataset-analysis
#10
Yu-Chen Liu, Hsiao-Chin Hong, Chi-Dung Yang, Wei-Hsiang Lee, Hsin-Tzu Huang, Hsien-Da Huang
BACKGROUND: Emerging evidence indicates that Circular RNAs (circRNAs) exert post-transcriptional regulation of gene expression. A subclass of circRNA was found enriched with miRNA target sites. This evidence suggests that this kind of circRNA functions as natural miRNA sponge. Noticing the potential impacts of circular RNA research, we were motivated to identify novel circRNAs as well as putative circRNA-miRNA interactions through retroactive sourced transcriptome sequencing samples. RESULTS: Through the analysis in 465 RNA-seq runs and 22 reports published in recent years, putatively circRNA sponged miRNA that had been experimentally verified targeting circRNA host gene were found...
May 9, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29762514/blackcurrant-leaf-chlorosis-associated-virus-evidence-of-the-presence-of-circular-rna-during-infections
#11
Delano James, James Phelan, Daniel Sanderson
Blackcurrant leaf chlorosis associated virus (BCLCaV) was detected recently by next-generation sequencing (NGS) and a new and distinct species in the genus Idaeovirus was proposed. Analysis of NGS-derived paired-end reads revealed the existence of bridge reads encompassing the 3'-terminus and 5'-terminus of RNA-2 or RNA-3 of BCLCaV. The full RNA-2 or RNA-3 could be amplified using outward facing or abutting primers; also, RNA-2/RNA-3 could be detected even after three consecutive RNase R enzyme treatments, with denaturation at 95 °C preceding each digestion...
May 15, 2018: Viruses
https://www.readbyqxmd.com/read/29761996/-research-progress-of-competing-endogenous-rna
#12
REVIEW
Lin Wang, Jie Liu
The competing endogenous RNA (ceRNA) hypothesis is a new pattern of gene posttranscriptional regulation. Encoding mRNA, long noncoding RNA (lncRNA), pseudogene transcript, circular RNA (circRNA), etc. can regulate gene expression by binding microRNA (miRNA). According to the research, ceRNA regulatory network participates in the maintenance of normal physiological state, occurrence and development of diseases. This paper reviewed ceRNA with the following respects: the proposal of ceRNA hypothesis, members of ceRNA regulatory network, research status, limitations and future development directions of this hypothesis...
December 1, 2017: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
https://www.readbyqxmd.com/read/29760792/the-emerging-role-of-circular-rnas-in-hepatocellular-carcinoma
#13
REVIEW
Li-Peng Qiu, Yi-Hang Wu, Xiao-Feng Yu, Qi Tang, Liang Chen, Ke-Ping Chen
Hepatocellular carcinoma (HCC) ranks the third leading cause of cancer death in the world and has a notably low survival rate. Circular RNAs (circRNAs) are newly classed non-coding RNA (ncRNA) members that are capable of regulating gene expression at transcription or post-transcription levels. Recent studies demonstrate that some circRNAs are differentially expressed in HCC, and the deregulation of these circRNAs is associated with the clinical pathological and prognostic significance. They also play essential roles in HCC progression, and contribute to cell proliferation, migration, invasion and metastasis by targeting different microRNAs (miRNAs) and protein-coding genes...
2018: Journal of Cancer
https://www.readbyqxmd.com/read/29750033/dna-and-rna-binding-ability-of-oligodapt-a-nucleobase-decorated-peptide-for-biomedical-applications
#14
Domenica Musumeci, Valentina Roviello, Giovanni N Roviello
Background: Nucleobase-bearing peptides and their interaction with DNA and RNA are an important topic in the development of therapeutic approaches. On one hand, they are highly effective for modulating the nucleic-acid-based biological processes. On the other hand, they permit to overcome some of the main factors limiting the therapeutic efficacy of natural oligonucleotides, such as their rapid degradation by nucleases. Methods and results: This article describes the synthesis and characterization of a novel thymine-bearing nucleoamino acid based on the l-diaminopropionic acid (l-Dap) and its solid phase oligomerization to α-peptides (oligoDapT), characterized using mass spectrometry, spectroscopic techniques, and scanning electron microscopy (SEM) analysis...
2018: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29748605/targeting-circular-rna-zranb1-for-therapeutic-intervention-in-retinal-neurodegeneration
#15
Jia-Jian Wang, Kun Shan, Bai-Hui Liu, Chang Liu, Rong-Mei Zhou, Xiu-Miao Li, Rui Dong, Shu-Jie Zhang, Sheng-Hai Zhang, Ji-Hong Wu, Biao Yan
Glaucoma is a neurodegenerative disease characterized by retinal ganglion cell (RGC) loss, optic disc excavation, and progressive visual field loss. Direct or indirect ameliorating retinal neurodegeneration is a promising therapeutic therapy for glaucoma. Circular RNAs (circRNAs) are a class of covalently closed circular RNA transcripts and have emerged as potential regulators in several neurodegenerative diseases. In this study, we show that cZRANB1 expression is significantly upregulated in retinal neurodegeneration induced by glaucoma...
May 10, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29747577/genome-wide-analysis-of-differentially-expressed-profiles-of-mrnas-lncrnas-and-circrnas-during-cryptosporidium-baileyi-infection
#16
Guan-Jing Ren, Xian-Cheng Fan, Ting-Li Liu, Sha-Sha Wang, Guang-Hui Zhao
BACKGROUND: Cryptosporidium baileyi is the most common Cryptosporidium species in birds. However, effective prevention measures and treatment for C. baileyi infection were still not available. Long non-coding RNAs (lncRNAs) and circular RNAs (circRNAs) play important roles in regulating occurrence and progression of many diseases and are identified as effective biomarkers for diagnosis and prognosis of several diseases. In the present study, the expression profiles of host mRNAs, lncRNAs and circRNAs associated with C...
May 10, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29744354/identification-of-gastric-cancer-related-circular-rna-through-microarray-analysis-and-bioinformatics-analysis
#17
Wei Gu, Ying Sun, Xiong Zheng, Jin Ma, Xiao-Ying Hu, Tian Gao, Mei-Jie Hu
Gastric cancer is one of the common malignant tumors worldwide. Increasing studies have indicated that circular RNAs (circRNAs) play critical roles in the cancer progression and have shown great potential as useful markers and therapeutic targets. However, the precise mechanism and functions of most circRNAs are still unknown in gastric cancer. In the present study, we performed a microarray analysis to detect circRNA expression changes between tumor samples and adjacent nontumor samples. The miRNA expression profiles were obtained from the National Center of Biotechnology Information Gene Expression Omnibus (GEO)...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29743374/common-and-distinct-capsid-and-surface-protein-requirements-for-secretion-of-complete-and-genome-free-hepatitis-b-virions
#18
Xiaojun Ning, Laurie Luckenbaugh, Kuancheng Liu, Volker Bruss, Camille Sureau, Jianming Hu
During the morphogenesis of hepatitis B virus (HBV), an enveloped virus, two types of virions are secreted: (1) a minor population of complete virions containing a mature nucleocapsid with the characteristic, partially double-stranded, relaxed circular DNA genome and (2) a major population containing an empty capsid with no DNA or RNA (empty virions). Secretion of both types of virions requires interactions between the HBV capsid or core protein (HBc) and the viral surface or envelope proteins. We have studied the requirements from both HBc and envelope proteins for empty virion secretion, in comparison with those for secretion of complete virions...
May 9, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29739336/circular-rna-expression-and-regulatory-network-prediction-in-posterior-cingulate-astrocytes-in-elderly-subjects
#19
Shobana Sekar, Lori Cuyugan, Jonathan Adkins, Philipp Geiger, Winnie S Liang
BACKGROUND: Circular RNAs (circRNAs) are a novel class of endogenous, non-coding RNAs that form covalently closed continuous loops and that are both highly conserved and abundant in the mammalian brain. A role for circRNAs in sponging microRNAs (miRNAs) has been proposed, but the circRNA-miRNA-mRNA interaction networks in human brain cells have not been defined. Therefore, we identified circRNAs in RNA sequencing data previously generated from astrocytes microdissected from the posterior cingulate (PC) of Alzheimer's disease (AD) patients (N = 10) and healthy elderly controls (N = 10) using four circRNA prediction algorithms - CIRI, CIRCexplorer, find_circ and KNIFE...
May 9, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29738762/circular-rna-hsa_circ_0023404-exerts-an-oncogenic-role-in-cervical-cancer-through-regulating-mir-136-tfcp2-yap-pathway
#20
Jianhua Zhang, Xinyuan Zhao, Jin Zhang, Xuerong Zheng, Fenxia Li
Cervical cancer (CC) is one of the most prevalent malignances among women. However, the mechanism underlying CC development remains elusive. Recently, circular RNAs (circRNAs) have been known as important regulators in tumorigenesis. Whether circRNAs are involved in CC requires to be determined. In the present study, we found that circRNA hsa_circ_0023404 was significantly upregulated in CC tissues compared to adjacent normal tissues. And its overexpression was correlated with poor prognosis in CC patients...
May 5, 2018: Biochemical and Biophysical Research Communications
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