Articles tagged with Microrna
Researchers at ULg discovered a new kind of mutation that may contribute to the wide range of phenotypic variations observed in various species, including humans. The Patrocles database provides a comprehensive collection of these mutations, which can aid in discovering similar phenomena for other phenotypes and hereditary diseases.
A study published in the Proceedings of the National Academy of Sciences found that overexpression of microRNA miR155 leads to the development of a neoplastic disease in transgenic mice. The researchers believe that miR155 acts as an oncogene, promoting abnormal cell growth and cancerous transformations.
Researchers discovered four protein biomarkers that can predict death from colorectal cancer independent of stage or location. A micro-RNA signature also predicts colon cancer development by regulating gene expression and cellular pathways.
Researchers discovered a new therapeutic target for hepatitis C using microRNA-122. The study found that miR-122 binds to a specific region of the virus, suggesting a potential approach for inhibiting viral replication.
Stanford scientist Sarnow discusses new approach to treating hepatitis C virus using microRNA, a small fragment of RNA found in the liver that is necessary for viral growth and reproduction. The approach aims to lower microRNA levels in the liver without affecting liver function, potentially leading to improved treatment outcomes.
Researchers at Thomas Jefferson University discovered a genetic signature that predicts colon cancer, distinguishing between stem cell and non-stem cell activity in colon crypts. This finding could lead to the development of new drugs by replacing lost molecules involved in cancer development.
A study by Ohio State University researchers discovered a set of 17 miRNAs turned off during normal megakaryocyte differentiation, creating a molecular signature for healthy platelets. In contrast, 10 miRNAs were found to be turned on in acute megakaryoblastic leukemia cells, suggesting a potential target for new therapies.
Researchers developed a genome-wide map of miRNA-mRNA interactions using the PicTar algorithm, predicting that one-third of C. elegans miRNAs target related genes. The study also found that 3' UTRs contain a largely unexplored universe for gene regulation.
miR-278 plays a crucial role in regulating insulin sensitivity in flies, with reduced insulin sensitivity and elevated blood glucose levels observed in flies lacking this microRNA. The study highlights the importance of microRNAs in metabolic regulation.
A common molecular signature of miRNA expression has been identified in solid tumors, providing insight into gene regulation and potential new approaches for diagnosis and treatment. This finding confirms the importance of microRNAs in growth and survival across species.
A new mechanism for regulating brain function has been discovered using microRNAs, fine-tuning synaptic connections to enhance information storage and computational capacity. The research suggests a link between microRNA miR-134 and disorders such as mental retardation and autism.
Scientists have identified two microRNAs, miR-1 and miR-133, that play opposing roles in determining whether myoblasts proliferate or differentiate into mature muscle cells. Increasing miR-1 promotes differentiation, while increasing miR-133 enhances proliferation.
Researchers discover precursor miRNAs undergo specific RNA editing, suppressing expression and activity. This finding expands our understanding of the complex process of gene regulation, with implications for embryonic development, cell differentiation, and cancer formation.
Researchers have identified 23 microRNAs that are significantly altered in the cancerous tissue compared to normal samples, with three miRs dramatically overexpressed and forming a signature that predicts the presence of malignant tissue. The study provides evidence for the regulatory role of microRNA in thyroid cancer development.
Researchers found that deleting or over-expressing the lin-4 microRNA in C. elegans worm resulted in a shorter or longer lifespan, respectively. This study suggests an intrinsic biological clock regulates both organ development and aging.
Recent studies have shed light on RISC assembly in humans, a process crucial for gene expression and regulation. The research found that RISC components are assembled from individual genes to form functional complexes.
Researchers have identified a specific microRNA - miR 196 - playing a protective role in hindlimb development, but not forelimb development, suggesting a fail-safe mechanism to regulate gene expression. This finding may be useful in understanding birth defects and has implications for the regulation of protein expression in limbs.
A new study published in Science demonstrates that microRNAs affect the expression or evolution of the majority of human genes. The researchers found that nearly all genes contain short sequences matching microRNA target sites, which are evolutionarily conserved across species.
A new study published in Cell identifies RISC as a three-protein complex responsible for microRNA production and specificity in gene silencing. The complex, consisting of Dicer, Argonaute 2, and TRBP enzymes, oversees the creation of microRNAs and guides them to target specific messenger RNAs.
Dmir-1 is specifically expressed in muscle cells, regulating Twist and Mef2 transcription factors. Muscle integrity and identity are maintained by Dmir-1, ensuring non-muscle gene mRNAs remain inactive.
Chronic leukemia affects 9,700 Americans annually, with unusual microRNAs enabling damaged cells to survive. Researchers discovered that miR-15 and miR-16 play a crucial role in controlling Bcl-2 levels, leading to tumor growth.
A study from Ohio State University's Comprehensive Cancer Center discovered a set of microRNAs that can distinguish between normal and cancerous breast tissue. The findings suggest that microRNA expression is correlated with breast cancer's hormone status, metastatic potential, and proliferative rate.
Researchers have discovered that microRNAs are involved in the process of oogenesis, a complex regulatory mechanism controlling protein abundance. The findings suggest that miRNA dysfunction may contribute to certain forms of infertility.
Scientists with the UF Genetics Institute found that eliminating microRNAs from specific tissues can reveal their vital role in healthy development. The technique may provide insight into human birth defects and has potential applications in studying the function and malfunction of microRNAs, a crucial part of human gene expression.
Researchers found that over half of the 46 known microRNAs are essential for development, affecting it in specific ways. MicroRNAs regulate fundamental processes such as body patterning, morphogenesis, and nervous system development.
Researchers at NYU's Center for Comparative Functional Genomics discovered that thousands of genes in the fruit fly genome are regulated by microRNAs, with 70% having a predicted biological function. The study suggests a larger role for microRNAs during evolution and could explain differences between species.
Researchers discovered extensive microRNA target gene predictions, assigning a biological function to 70% of all microRNAs. The findings provide insights into the importance and function of microRNAs across huge evolutionary time scales, shedding light on their role in shaping life's diversity.
A new study by The Wistar Institute has identified a three-protein complex responsible for producing mature miRNAs in the cell cytoplasm. This complex is associated with Argonaute 2, which plays a crucial role in gene silencing. The research also links miRNA production to HIV replication and tumor suppression.
Researchers at UT Southwestern discovered that microRNA miR-1 targets the mRNA of the gene Hand2, a key regulator of heart formation. This fine-tuning allows proper heart muscle development and may aid in understanding congenital heart disease.
Researchers found that microRNAs play a crucial role in regulating gene expression and enabling stem cells to pass from the normal stop phase to the stage of replicating their DNA for later division. The discovery suggests that microRNAs may also control cell division in cancer cells, encouraging proliferation.
A novel tool has been developed to accurately classify human cancers based on microRNA expression patterns, offering a promising diagnostic approach. The study reveals striking correlations between miRNA profiles and specific tumor types, providing new insights into the genomic approaches to cancer diagnosis.
Researchers at Johns Hopkins Medicine discovered that the Myc protein controls the production of six microRNAs in human lymphoma cells, which can either promote or slow cell growth. The study's findings suggest a complex system involving Myc, microRNAs, and genes controlling cell proliferation.
Researchers found that mir-17-92 cluster microRNAs are overexpressed in most common cancers, including B-cell lymphoma and colorectal carcinomas. This overexpression may contribute to cancer development and progression.
Researchers discovered distinctive patterns of microRNA activity in cancer cells that can be used to diagnose cancers and distinguish normal cells from those that are cancerous. The study also found that specific microRNAs can cause lymphomas in mice and cooperate with genes already known to cause human cancers.
A virus can adapt the host's gene silencing machinery to evade the immune response by using microRNAs to silence a key protein target. This finding bolsters evidence that microRNAs play important roles in infected cells, challenging the long-held notion of their sole role as an antiviral defense mechanism.
The miRNA profiling technique is widely used in cancer research to identify and quantify microRNAs in tumor tissues. Researchers have found that specific miRNA patterns are associated with different types of cancers, leading to potential biomarkers for diagnosis and treatment.
MicroRNAs play a crucial role in regulating plant development by controlling gene expression related to the auxin response pathway. Studies show that microRNA-mediated regulation of genes like ARF17 and NAC1 is essential for normal plant growth, affecting root and shoot development.
Researchers at NYU's Center for Comparative Functional Genomics have discovered a complex system of microRNA gene regulation, with individual genes controlling an average of 200 different transcripts. The team developed PicTar, a new algorithm to predict microRNA target sites in the genome, and made several experimental validations.
Scientists have discovered that microRNA works in conjunction with multiple proteins to target messenger RNA, regulating genetic expression. This discovery sheds light on the stability and degradation of mRNA, a crucial process in controlling gene expression and preventing diseases like cancer and septic shock.
A recent study published in the journal Cell has found that over 30% of human genes are controlled by RNA molecules, providing new insights into gene regulation. The researchers used computational methods to identify microRNAs that target specific genes, revealing a vast network of regulatory interactions.
A new study from The Wistar Institute identified a microprocessor complex essential for miRNA production, linking it to DiGeorge syndrome and potentially schizophrenia. The discovery provides insights into the processing mechanisms of miRNAs and may lead to future investigations into these disorders.
A team of researchers has discovered that microRNA miR-375 regulates insulin secretion, opening up new avenues for understanding and treating diabetes. The study's findings define a biological function for a mammalian microRNA gene and highlight the importance of collaboration between computation and experiment in modern biology.
In Arabidopsis leaves, specific mutations affect leaf patterning by altering microRNA binding sites. MicroRNAs interact with nascent mRNA to alter chromatin states, leading to reduced methylation of PHB and PHV genes. This study demonstrates the role of microRNA-directed DNA modification in regulating plant development.
A research team from Purdue University has successfully created RNA-based nanoscale structures, which could be used as building blocks for microscopic machines. The researchers have developed methods to self-assemble RNA molecules into complex shapes, such as arrays that can form the scaffolding on which other components could be mounted.
Researchers identified two genetic signatures in CLL samples, one associated with a good prognosis and the other with a mutation in the Ig gene. The study suggests that miRNA expression may be used to predict CLL behavior and provides new targets for future drug development.
Researchers discover small RNA molecules in plant phloem, suggesting a novel role in long-distance signaling and stress response. A new protein is identified as likely playing a key role in transporting these RNAs through the phloem.
Researchers at Thomas Jefferson University have developed a microarray chip that can track the genetic signature of cancer and normal tissue by analyzing miRNA gene expression patterns. This technology has the potential to provide new targets for drug development and improve our understanding of cancer phenotypes.
Researchers at Rice University and MIT found that microRNA miR164 plays a crucial role in regulating gene expression and controlling basic organ development in plants. The study reveals abnormal development of leaves and flowers when miR164 regulation is absent or overexpressed.
Researchers from Case Western Reserve University School of Medicine have discovered that RNA helicases can displace proteins from single-stranded RNA and change shape without unwinding duplexes. This finding redefines the mechanism of action of RNA helicases, providing new insights into their roles in various biological processes.
Researchers have discovered a shared gene regulation mechanism in all major plant groups, controlled by microRNAs, and this system has been conserved for 400 million years. This finding opens up new possibilities for understanding plant development and evolution.
Researchers develop system to study small RNAs using siRNA inhibitors, providing unprecedented insight into RNA interference and microRNA functions. The technique enables rapid discovery of hundreds of microRNAs' regulatory roles, with significant implications for genetic studies.
Researchers have used a bioinformatics approach to identify additional microRNA targets in fruit fly Drosophila, increasing the number of known targets from three to over 60. The study provides an important step towards understanding how microRNAs affect protein composition in animal cells.
Researchers have discovered that microRNAs play a crucial role in controlling plant growth and development by regulating cell division and leaf shape. The study found that a specific microRNA called "Jaw" targets messenger RNAs involved in preventing excessive cell division, leading to abnormal leaf shapes.
Researchers have discovered microRNA JAW that controls the development of flat leaves, a key characteristic in capturing sunlight and energy. The study reveals the importance of microRNA regulation in plant morphology, paving the way for new avenues in agricultural advancements.
A novel computational method, MiRscan, has been developed to estimate the total number of miRNA genes in different animals. The researchers used this tool to identify 88 miRNA genes in C. elegans and estimated that miRNA genes comprise nearly one percent of the human genome.
Dr. David Bartel and colleagues have identified 16 novel miRNAs in Arabidopsis that regulate gene expression during development. The researchers demonstrate a plant homologue of the Dicer enzyme, CARPEL FACTORY (CAF), which processes plant miRNAs with sequence and structural similarities to animal miRNAs.
Researchers have identified 31 novel microRNAs and their associated protein complexes. The discovery reveals a possible link between the pathway of miRNA activity and the progression of spinal muscular atrophy, a common childhood neuromuscular disorder.
Researchers have identified a new class of microRNAs in the roundworm C. elegans, which are tiny regulatory RNAs that can regulate gene expression without producing proteins. The study found dozens of these genes, including two that are also present in humans and could play a role in heart tissue development.
Researchers at UCSF have discovered a region in the telomerase enzyme that could be targeted to kill cancer cells and regenerate damaged cells. The discovery provides new insights into the mechanism of telomerase and its potential as a therapeutic target, as well as its role in regulating cell life span.
Researchers at the University of Rochester have created a remarkably short antisense compound that targets Pneumocystis carinii, an opportunistic pathogen causing pneumonia in people with weakened immune systems. The breakthrough marks a step toward designing drugs that knock out vital sections of molecules essential for the microbe's ...