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exosomal RNA

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https://www.readbyqxmd.com/read/28634583/circular-rnas-biogenesis-function-and-role-in-human-diseases
#1
REVIEW
John Greene, Anne-Marie Baird, Lauren Brady, Marvin Lim, Steven G Gray, Raymond McDermott, Stephen P Finn
Circular RNAs (circRNAs) are currently classed as non-coding RNA (ncRNA) that, unlike linear RNAs, form covalently closed continuous loops and act as gene regulators in mammals. They were originally thought to represent errors in splicing and considered to be of low abundance, however, there is now an increased appreciation of their important function in gene regulation. circRNAs are differentially generated by backsplicing of exons or from lariat introns. Unlike linear RNA, the 3' and 5' ends normally present in an RNA molecule have been joined together by covalent bonds leading to circularization...
2017: Frontiers in Molecular Biosciences
https://www.readbyqxmd.com/read/28629752/rna-containing-exosomes-in-induced-sputum-of-asthmatic-patients
#2
Sara Sánchez-Vidaurre, Maria Eldh, Pia Larssen, Kameran Daham, Maria-Jose Martinez-Bravo, Sven-Erik Dahlén, Barbro Dahlén, Marianne van Hage, Susanne Gabrielsson
This is the first demonstration of RNA-containing exosomes in induced sputum from allergic asthmatic patients, both before and after an allergen provocation. Exosomes could serve as future candidate biomarkers in asthma.
June 16, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28623135/serum-long-non-coding-rna-malat-1-protected-by-exosomes-is-up-regulated-and-promotes-cell-proliferation-and-migration-in-non-small-cell-lung-cancer
#3
Rui Zhang, Yuhong Xia, Zhixin Wang, Jie Zheng, Yafei Chen, Xiaoli Li, Yu Wang, Huaikun Ming
Circulating lncRNAs have been defined as a novel biomarker for non-small cell lung cancer (NSCLC), MALAT-1 was first identified lncRNA that was related to lung cancer metastasis. However, the relationship between exosomal lncRNAs and the diagnosis and prognosis of NSCLC was poorly understood. The aim of this study is to evaluate the clinical significance of serum exosomal MALAT-1 as a biomarker in the metastasis of NSCLC. In this study, we firstly isolated the exosomes from healthy subjects and NSCLC patients...
June 13, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28620131/exosomes-containing-differential-expression-of-microrna-and-mrna-in-osteosarcoma-that-can-predict-response-to-chemotherapy
#4
Ji-Feng Xu, Ya-Ping Wang, Shui-Jun Zhang, Yu Chen, Hai-Feng Gu, Xiao-Fan Dou, Bing Xia, Qing Bi, Shun-Wu Fan
A major challenge in osteosarcoma (OS) is the selection of the most effective chemotherapeutic agents for individual patients, while the administration of ineffective chemotherapy increases mortality and decreases quality of life in patients. This emphasizes the need to evaluate every patient's probability of responding to each chemotherapeutic agent. We developed a profiling strategy for serum exosomal microRNAs and mRNAs in OS patients with differential chemotherapeutic responses. Twelve miRNAs were up regulated and 18 miRNAs were under regulated significantly in OS patient with poor chemotherapeutic response when compared with those in good chemotherapeutic response (p<0...
June 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/28607485/exosomes-facilitate-therapeutic-targeting-of-oncogenic-kras-in-pancreatic-cancer
#5
Sushrut Kamerkar, Valerie S LeBleu, Hikaru Sugimoto, Sujuan Yang, Carolina F Ruivo, Sonia A Melo, J Jack Lee, Raghu Kalluri
The mutant form of the GTPase KRAS is a key driver of pancreatic cancer but remains a challenging therapeutic target. Exosomes are extracellular vesicles generated by all cells, and are naturally present in the blood. Here we show that enhanced retention of exosomes, compared to liposomes, in the circulation of mice is likely due to CD47-mediated protection of exosomes from phagocytosis by monocytes and macrophages. Exosomes derived from normal fibroblast-like mesenchymal cells were engineered to carry short interfering RNA or short hairpin RNA specific to oncogenic Kras(G12D), a common mutation in pancreatic cancer...
June 7, 2017: Nature
https://www.readbyqxmd.com/read/28592924/suppression-of-endothelial-cell-migration-by-tumor-associated-macrophage-derived-exosomes-is-reversed-by-epithelial-ovarian-cancer-exosomal-lncrna
#6
Quanfeng Wu, Xiaoli Wu, Xiang Ying, Qinyi Zhu, Xinjing Wang, Lu Jiang, Xin Chen, Yueqian Wu, Xipeng Wang
OBJECTIVE: To study the mechanism by which epithelial ovarian cancer (EOC)-derived exosomes restore the migration of endothelial cells that is suppressed by TAM-derived exosomes. METHODS: Exosomes were isolated from TAMs in the ascites of patients with EOC. The effect of exosomes on the expression of endothelial cell miRNA was monitored by PCR. The miRNA mimics were transfected to explore their effects. Microarray data and literature searches were used to predict target genes and the impact of target gene pathways, and small interfering RNA was used to target these genes...
2017: Cancer Cell International
https://www.readbyqxmd.com/read/28574310/exosomes-as-a-biomarker-platform-for-detecting-epidermal-growth-factor-receptor-positive-high-grade-gliomas
#7
Sasidhar Venkata Manda, Yogesh Kataria, Babul Reddy Tatireddy, Balasubramaniam Ramakrishnan, Boola Gnana Ratnam, Rahul Lath, Alok Ranjan, Amitava Ray
OBJECTIVE High-grade glial brain tumors are often characterized by an elevated expression of the tumorigenic epidermal growth factor receptor variant III ( EGFRvIII). The authors sought to establish a clinically adaptive protocol as a noninvasive diagnostic tool for EGFRvIII detection through serum exosomes. METHODS Purity of serum exosome/RNA was confirmed by electron microscopy and flow cytometry and through an RNA bioanalyzer profile. EGFRvIII amplification was initially established by semiquantitative polymerase chain reaction in tumor tissues and exosomes...
June 2, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28557957/plasma-exosomes-from-hla-sensitized-kidney-transplant-recipients-contain-mrna-transcripts-which-predict-development-of-antibody-mediated-rejection
#8
Hao Zhang, Edmund Huang, Joseph Kahwaji, Cynthia C Nast, Ping Li, James Mirocha, David L Thomas, Shili Ge, Ashley A Vo, Stanley C Jordan, Mieko Toyoda
BACKGROUND: Sensitization to human leukocyte antigens (HLA) remains a significant immunologic barrier to successful transplantation. Identifying immune mechanisms responsible for antibody-mediated rejection (ABMR) is an important goal. Here we explored the possibility of predicting the risk for ABMR by measuring mRNA transcripts of ABMR-associated genes in plasma exosomes from kidney transplant patients. METHODS: Total RNA was extracted from exosomes purified from 152 EDTA-plasma samples of 64 patients (18 ABMR, 8 cell-mediated rejection [CMR], 38 no rejection in desensitized (DES) and non-desensitized (non-DES) control groups) for reverse transcription into cDNA, preamplification and then real time quantitative polymerase chain reaction (qPCR) for 21 candidate genes...
May 27, 2017: Transplantation
https://www.readbyqxmd.com/read/28546080/exosomes-in-hiv-infection-a-review-and-critical-look
#9
REVIEW
Joel Henrique Ellwanger, Tiago Degani Veit, José Artur Bogo Chies
Exosomes are nanovesicles released into the extracellular medium by different cell types. These vesicles carry a variety of protein and RNA cargos, and have a central role in cellular signaling and regulation. A PubMed search using the term "exosomes" finds 67 articles published in 2006. Ten years later, the same search returns approximately 1200 results for 2016 alone. The growing interest in exosomes within the scientific community reflects the different roles exerted by extracellular vesicles in biological systems and diseases...
May 22, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28539363/identification-of-karyopherins-involved-in-the-nuclear-import-of-rna-exosome-subunit-rrp6-in-saccharomyces-cerevisiae
#10
Fernando A Gonzales-Zubiate, Ellen K Okuda, Julia Pc Da Cunha, Carla Columbano Oliveira
The exosome is a conserved multiprotein complex essential for RNA processing and degradation. The nuclear exosome is a key factor for pre-rRNA processing through the activity of its catalytic subunits, Rrp6 and Rrp44. In Saccharomyces cerevisiae, Rrp6 is exclusively nuclear and has been shown to interact with exosome cofactors. With the aim of analyzing proteins associated with the nuclear exosome, in this work, we purified the complex with Rrp6-TAP, identified the co-purified proteins by mass spectrometry, and found karyopherins to be one of the major groups of proteins enriched in the samples...
May 24, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28536329/-multilateral-strategies-utilizing-exosomes-for-cancer-therapy
#11
Nao Nishida-Aoki, Takahiro Ochiya
Exosomes are nano-sized extracellular vesicles which transfer their components such as RNA, DNA, and proteins from one cell to another cell. The components are released to the cytoplasm of the recipient cells, having an effect on the cells. Cancerderived exosomes promote cancer progression, invasion, gain of drug resistance, and metastasis. Recently, according to their characteristics, it is expected to apply exosomes to cancer therapies, such as utilizing exosomes as drug delivery systems(DDS) for anticancer drugs and as cancer vaccines to enhance immunity to cancer cells...
May 2017: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/28536328/-microrna-in-various-aspects-of-cancer-development
#12
Sho Nambara, Koshi Mimori
MicroRNAs(miRNAs)are small(18-25 nucleotides)noncoding RNA molecules that bind to partially complementary mRNA sequences, resulting in target degradation or translation inhibition. A single miRNA can influence the expression of hundreds of target genes, and miRNAs have been implicated as key molecules in various diseases, including cancer. Many studies have shown that the miRNAs play an important role in cancer cells and tumor microenvironment and may be biomarkers for early detection and therapeutic targets for various cancers...
May 2017: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/28536264/exosomes-from-uninfected-cells-activate-transcription-of-latent-hiv-1
#13
Robert A Barclay, Angela Schwab, Catherine DeMarino, Yao Akpamagbo, Benjamin Lepene, Seble Kassaye, Sergey Iordanskiy, Fatah Kashanchi
HIV-1 infection causes AIDS, infecting millions worldwide. The virus can persist in a state of chronic infection due to its ability to become latent. We have previously shown a link between HIV-1 infection and exosome production. Specifically, we have reported that exosomes transport viral proteins and RNA from infected cells to neighboring uninfected cells. These viral products could then elicit an innate immune response, leading to activation of the Toll-like receptor (TLR) and NF-κB pathways. In this study, we asked whether exosomes from uninfected cells could activate latent HIV-1 in infected cells...
May 23, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28531338/placental-exosomes-as-early-biomarker-of-preeclampsia-potential-role-of-exosomal-micrornas-across-gestation
#14
Carlos Salomon, Dominic Guanzon, Katherin Scholz-Romero, Sherri Longo, Paula Correa, Sebastian E Illanes, Gregory E Rice
Context: There is a need to develop strategies for early prediction of patients who will develop preeclampsia (PE), in order to establish preventive strategies to reduce the prevalence and severity of the disease and their associated complications. Objective: The objective of this study was to investigate whether exosomes and their microRNA cargo present in maternal circulation can be used as early biomarker for PE. Design, Setting, Patients, and Interventions: A retrospective stratified study design was used to quantify total exosomes (EXO) and placenta-derived exosomes (PdE) present in maternal plasma of normal (n=32 per time point) and PE (n=15 per time point) pregnancies...
May 22, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28526928/exosomes-in-cardiovascular-medicine
#15
REVIEW
Iain M Dykes
Exosomes are small, extracellular membrane-bound particles that mediate intercellular transport of a cytosolic cargo. Exosomal transfer of micro-RNA can modify gene expression in targeted cells. Exosome-based endocrine/paracrine signaling has been shown to be involved in a wide range of physiological processes including those associated with cardiovascular injury and disease, but remains relatively poorly understood. Exosomes offer great potential to the clinical field, with applications in both diagnostics and therapeutics...
May 19, 2017: Cardiology and Therapy
https://www.readbyqxmd.com/read/28521391/role-of-stem-cell-derived-exosomes-in-cancer
#16
Junyi Wu, Zhen Qu, Zi-Wei Fei, Jun-Hua Wu, Chun-Ping Jiang
Exosomes are small, extracellular membrane- enclosed vesicles that contain a variety of molecules, including proteins, DNA, mRNA and non-coding RNA; these vesicles have been defined as new tools for intercellular communication between cells. Numerous types of cells, including stem cells, secrete exosomes into the extracellular environment, and are significant communicators in the tumor microenvironment. Stem cells are a unique cell population defined by their ability to indefinitely self-renew, differentiate into a variety of cell lines, and form clonal cell populations...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28520934/the-smap1-2-proteins-of-the-crenarchaeon-sulfolobus-solfataricus-interact-with-the-exosome-and-stimulate-a-rich-tailing-of-transcripts
#17
Birgit Märtens, Linlin Hou, Fabian Amman, Michael T Wolfinger, Elena Evguenieva-Hackenberg, Udo Bläsi
The conserved Sm and Sm-like proteins are involved in different aspects of RNA metabolism. Here, we explored the interactome of SmAP1 and SmAP2 of the crenarchaeon Sulfolobus solfataricus (Sso) to shed light on their physiological function(s). Both, SmAP1 and SmAP2 co-purified with several proteins involved in RNA-processing/modification, translation and protein turnover as well as with components of the exosome involved in 3΄ to 5΄ degradation of RNA. In follow-up studies a direct interaction with the poly(A) binding and accessory exosomal subunit DnaG was demonstrated...
May 18, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28515288/motor-recovery-beginning-23-years-after-ischemic-stroke
#18
Peter Sörös, Robert Teasell, Daniel F Hanley, J David Spence
It is widely believed that most stroke recovery occurs within 6 months, with little benefit of physiotherapy or other modalities beyond a year. We report a remarkable case of stroke recovery beginning 23 years after a severe stroke due to embolization from the innominate artery and subclavian artery, resulting from compression of the right subclavian artery by a cervical rib. The patient had a large right fronto-parietal infarction with severe left hemiparesis, and a totally non-functional spastic left hand...
May 17, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28514744/characterization-of-mouse-serum-exosomal-small-rna-content-the-origins-and-their-roles-in-modulating-inflammatory-response
#19
Xin Zhou, Zinan Jiao, Juling Ji, Shuyuan Li, Xiaodi Huang, Xiaoshuang Lu, Heng Zhao, Jingwen Peng, Xinya Chen, Qiuhong Ji, Yuhua Ji
In the last decade, although studies on exosomal microRNAs (miRNAs) derived from serum and other body fluids have increased dramatically; the contents and biological significance of serum exosomes under normal conditions remain unclear. In the present study, we profiled the small RNA content of mouse serum exosomes (mSEs) using small RNAseq and found that fragments of transfer RNAs (tRNAs) and miRNAs were the two predominant exosomal RNA species, accounting for approximately 60% and 10% of mapped reads, respectively...
April 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28500324/labeling-extracellular-vesicles-for-nanoscale-flow-cytometry
#20
Aizea Morales-Kastresana, Bill Telford, Thomas A Musich, Katherine McKinnon, Cassandra Clayborne, Zach Braig, Ari Rosner, Thorsten Demberg, Dionysios C Watson, Tatiana S Karpova, Gordon J Freeman, Rosemarie H DeKruyff, George N Pavlakis, Masaki Terabe, Marjorie Robert-Guroff, Jay A Berzofsky, Jennifer C Jones
Extracellular vesicles (EVs), including exosomes and microvesicles, are 30-800 nm vesicles that are released by most cell types, as biological packages for intercellular communication. Their importance in cancer and inflammation makes EVs and their cargo promising biomarkers of disease and cell-free therapeutic agents. Emerging high-resolution cytometric methods have created a pressing need for efficient fluorescent labeling procedures to visualize and detect EVs. Suitable labels must be bright enough for one EV to be detected without the generation of label-associated artifacts...
May 12, 2017: Scientific Reports
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