Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Discovered in plants at the turn of the century, microRNAs (miRNAs) have been found to be fundamental to many aspects of plant biology. These small (20–24 nt) regulatory RNAs are derived via processing from longer imperfect double-stranded RNAs. They are then incorporated into silencing complexes, which they guide to (m)RNAs of high sequence complementarity, resulting in gene silencing outcomes, either via RNA degradation and/or translational inhibition. Some miRNAs are ancient, being present in all species of land plants and controlling fundamental processes such as phase change, organ polarity, flowering, and leaf and root development. However, there are many more miRNAs that are much less conserved and with less understood functions. This Special Issue contains seven research papers that span from understanding the function of a single miRNA family to examining how the miRNA profiles alter during abiotic stress or nutrient deficiency. The possibility of circular RNAs in plants acting as miRNA decoys to inhibit miRNA function is investigated, as was the hierarchical roles of miRNA biogenesis factors in the maintenance of phosphate homeostasis. Three reviews cover the potential of miRNAs for agronomic improvement of maize, the role of miRNA-triggered secondary small RNAs in plants, and the potential function of an ancient plant miRNA.

microRNAs --- abiotic stress --- Arabidopsis thaliana --- heat stress --- photosynthesis --- maize (Zea mays L.) --- immunoprecipitation --- tapetum --- resurrection plants --- plastocyanin --- dehydration --- Tripogon loliiformis --- secondary siRNA --- RT-qPCR --- putrescine --- DRB2 --- phosphate (PO4) stress --- argonaute --- development --- miR399-directed PHO2 expression regulation --- circRNA --- Solanum lycopersicum --- copper deficiency --- salt stress --- DOUBLE-STRANDED RNA BINDING (DRB) proteins DRB1 --- P5CS --- proline --- phasiRNA --- drought stress --- agronomic traits --- Colorado potato beetle --- Cu-microRNA --- plant --- miR171 --- STTM --- aleurone --- PHOSPHATE2 (PHO2) --- vegetative growth --- nutrient availability --- miRNAs --- non-coding RNA --- pollen --- tomato --- flowering --- crop improvement --- callose --- miRNA target gene expression --- circular RNAs --- miRNA --- programmed cell death --- DRB4 --- microRNA (miRNA) --- target mimicry --- MYB transcription factors --- post-transcriptional gene silencing --- desiccation --- miR399 --- miR159 --- copper protein --- drought --- microRNAs (miRNAs) --- microRNA --- GAMYB --- tasiRNA --- phosphorous (P)

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

MicroRNAs (miRNAs) are small noncoding RNAs that are 19–24 nucleotides in length, following maturation. Recent evidence has demonstrated their key role as post-transcriptional regulators of gene expression through the binding of specific sequences within target messenger RNA (mRNA). miRNAs are involved in the synthesis of a very large number of proteins, and it is speculated that they could regulate up to 30% of the human genome. They control virtually every cellular process and are essential for animal development, cell differentiation, and homeostasis. Altered miRNA expression has been linked to such pathological events as inflammatory, degenerative, or autoimmune processes and have been associated with several diseases, including cancer, cardiovascular diseases, diabetes mellitus, and rheumatic and neurological disorders. Recently, miRNAs have been found in many different biological fluids, and this observation suggests the potential of miRNAs as new candidate biomarkers for diagnosis, classification, prognosis, and responsiveness in the treatment of different pathological conditions. Furthermore, the development of therapeutic strategies that involve either restoring or repressing miRNAs expression and activity has attracted much attention. Significant progress has been made in the systems for delivery of miRNAs, even if substantial improvements in this area are still necessary. Although they have been extensively studied, a number of interesting questions regarding the physiological and pathological role of miRNAs have been postulated, and their potential diagnostic and therapeutic role remain yet unanswered. Reactive oxygen species (ROS) are free radical-containing oxygen molecules derived from cellular oxidative metabolism, including enzyme activities and mitochondrial respiration, and play a pivotal role in many cellular functions. Whereas ROS are essential for normal cellular processes, their aberrant production, or failure of the capacity to scavenge excessive ROS, induces an altered redox status with excessive synthesis of free radicals, leading to an imbalance in the redox environment of the cell. The loss of normal ROS levels causes lipid, protein, and DNA damage, which contribute to the development of various pathologies including neurological disorders, rheumatic and cardiovascular diseases, diabetes, and cancer. Increasing evidence highlights that there is crosstalk between miRNAs and components of redox signaling, even if this complex and the characteristics of mutual interaction need to be amply elucidated. Hence, both miRNAs and oxidative stress are involved in the multifactorial development and progression of acute and chronic diseases by influencing numerous signaling and metabolic pathways. The Special Issue entitled "Crosstalk between MicroRNA and Oxidative Stress in Physiology and Pathology" of the International Journal of Molecular Sciences includes original articles and reviews that provide new insights into the interaction between miRNAs and oxidative stress under normal and pathological conditions which can assist in the development of new therapeutic strategies. Finally, I would like to thank all the authors for their excellent contribution. I hope this Special Issue will provide readers with updated knowledge about the role of miRNAs and oxidative stress in physiology and pathology.

Medicine --- miR-27a-5p --- acute myocardial infarction --- autophagy --- apoptosis --- hypoxia --- MicroRNA (miRNA) --- miR526b --- miR655 --- oxidative stress --- reactive oxygen species (ROS) --- superoxide (SO) --- Thioredoxin Reductase 1 (TXNRD1) --- breast cancer --- nucleic acid medicine --- pancreatic cancer --- clinical trial --- siRNA --- antisense oligonucleotide --- MicroRNA --- signal transduction --- therapeutic target --- miRNAs --- ROS --- noncoding RNA --- microRNA --- long noncoding RNA --- mitochondrial dysfunction --- nitrosative stress. exosome --- cross-talk --- systemic lupus erythematosus --- visfatin --- resistin --- osteoarthritis --- synovial fibroblasts --- synovitis --- NF-κB --- thyroid hormone --- liver cancer --- metabolism --- physiology --- ASH --- NAFLD --- NASH --- HCC --- HCV --- HBV --- endometriosis --- high-grade serous ovarian cancer --- endometriosis-associated ovarian cancer --- epithelial-to-mesenchymal transition --- chemoresistance --- antioxidants --- miRNA --- cancer --- diabetes --- beta cells --- microRNAs --- translation regulation --- neurodegeneration --- Alzheimer’s disease --- Parkinson’s disease --- Huntington’s disease --- ALS --- reactive oxygen species --- redox signaling --- therapeutic tolerance --- therapeutic resistance --- n/a --- Alzheimer's disease --- Parkinson's disease --- Huntington's disease

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

MicroRNAs (miRNAs) are small noncoding RNAs that are 19–24 nucleotides in length, following maturation. Recent evidence has demonstrated their key role as post-transcriptional regulators of gene expression through the binding of specific sequences within target messenger RNA (mRNA). miRNAs are involved in the synthesis of a very large number of proteins, and it is speculated that they could regulate up to 30% of the human genome. They control virtually every cellular process and are essential for animal development, cell differentiation, and homeostasis. Altered miRNA expression has been linked to such pathological events as inflammatory, degenerative, or autoimmune processes and have been associated with several diseases, including cancer, cardiovascular diseases, diabetes mellitus, and rheumatic and neurological disorders. Recently, miRNAs have been found in many different biological fluids, and this observation suggests the potential of miRNAs as new candidate biomarkers for diagnosis, classification, prognosis, and responsiveness in the treatment of different pathological conditions. Furthermore, the development of therapeutic strategies that involve either restoring or repressing miRNAs expression and activity has attracted much attention. Significant progress has been made in the systems for delivery of miRNAs, even if substantial improvements in this area are still necessary. Although they have been extensively studied, a number of interesting questions regarding the physiological and pathological role of miRNAs have been postulated, and their potential diagnostic and therapeutic role remain yet unanswered. Reactive oxygen species (ROS) are free radical-containing oxygen molecules derived from cellular oxidative metabolism, including enzyme activities and mitochondrial respiration, and play a pivotal role in many cellular functions. Whereas ROS are essential for normal cellular processes, their aberrant production, or failure of the capacity to scavenge excessive ROS, induces an altered redox status with excessive synthesis of free radicals, leading to an imbalance in the redox environment of the cell. The loss of normal ROS levels causes lipid, protein, and DNA damage, which contribute to the development of various pathologies including neurological disorders, rheumatic and cardiovascular diseases, diabetes, and cancer. Increasing evidence highlights that there is crosstalk between miRNAs and components of redox signaling, even if this complex and the characteristics of mutual interaction need to be amply elucidated. Hence, both miRNAs and oxidative stress are involved in the multifactorial development and progression of acute and chronic diseases by influencing numerous signaling and metabolic pathways. The Special Issue entitled "Crosstalk between MicroRNA and Oxidative Stress in Physiology and Pathology" of the International Journal of Molecular Sciences includes original articles and reviews that provide new insights into the interaction between miRNAs and oxidative stress under normal and pathological conditions which can assist in the development of new therapeutic strategies. Finally, I would like to thank all the authors for their excellent contribution. I hope this Special Issue will provide readers with updated knowledge about the role of miRNAs and oxidative stress in physiology and pathology.

Medicine --- miR-27a-5p --- acute myocardial infarction --- autophagy --- apoptosis --- hypoxia --- MicroRNA (miRNA) --- miR526b --- miR655 --- oxidative stress --- reactive oxygen species (ROS) --- superoxide (SO) --- Thioredoxin Reductase 1 (TXNRD1) --- breast cancer --- nucleic acid medicine --- pancreatic cancer --- clinical trial --- siRNA --- antisense oligonucleotide --- MicroRNA --- signal transduction --- therapeutic target --- miRNAs --- ROS --- noncoding RNA --- microRNA --- long noncoding RNA --- mitochondrial dysfunction --- nitrosative stress. exosome --- cross-talk --- systemic lupus erythematosus --- visfatin --- resistin --- osteoarthritis --- synovial fibroblasts --- synovitis --- NF-κB --- thyroid hormone --- liver cancer --- metabolism --- physiology --- ASH --- NAFLD --- NASH --- HCC --- HCV --- HBV --- endometriosis --- high-grade serous ovarian cancer --- endometriosis-associated ovarian cancer --- epithelial-to-mesenchymal transition --- chemoresistance --- antioxidants --- miRNA --- cancer --- diabetes --- beta cells --- microRNAs --- translation regulation --- neurodegeneration --- Alzheimer’s disease --- Parkinson’s disease --- Huntington’s disease --- ALS --- reactive oxygen species --- redox signaling --- therapeutic tolerance --- therapeutic resistance --- n/a --- Alzheimer's disease --- Parkinson's disease --- Huntington's disease

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

MicroRNAs (miRs) are small noncoding RNAs that function as post-transcriptional regulators of gene expression and have important roles in almost all biological pathways. Deregulated miR expression has been detected in numerous cancers, where miRs act as both oncogene and tumor suppressors. Due to their important roles in tumorigenesis, miRs have been investigated as prognostic and diagnostic biomarkers and as useful targets for therapeutic intervention. From a therapeutic point of view, two modalities can serve to rectify gene networks in cancer cells. For oncomiRs, a rational means is downregulation through antagomirs. Moreover, observations of the pathological reductions in tumor-suppressive miRs have inspired the concept of “miR replacement therapy” to enhance the amount of these miRs, thereby restoring them to normal levels. However, the clinical applicability of miR-based therapies is severely limited by the lack of effective delivery systems. Therefore, to understand the role of this new class of regulators, we need to identify the mRNA targets regulated by individual miRs as well as to develop specific, efficient, and safe delivery systems for therapeutic miRs.

Research & information: general --- Biology, life sciences --- Breast cancer --- Hypoxia inducible factor 1-alpha (HIF-1α) --- MicroRNA (miRNA) --- miR526b --- miR655 --- Oxidative stress --- Migration --- Cyclooxygenase-2 (COX-2) --- Prostaglandin E2 receptor 4 (EP4) --- PI3K/Akt --- adipokines --- endometrial cancer --- estrogens --- hyperinsulinemia --- insulin --- insulin resistance --- insulin signaling --- insulin-like growth factors --- microRNA --- miRNA --- ovarian cancer --- survival --- prognostic factor --- serum LDH --- blood biomarker --- circulating microRNA --- plasma --- immunotherapy --- immune checkpoint inhibitors --- metastatic melanoma --- hepatocellular carcinoma --- metastasis --- exosome --- bioinformatics analysis --- renal cancer --- RCC --- ccRCC --- meta-analysis --- miRNAs --- normal B-cell development --- B-CLL --- miRNA-transcription factor network --- regulation --- biomarker --- therapy --- prognosis --- diagnosis --- progression --- prediction --- smoking --- non-small cell lung cancer --- methylation --- miR-584-5p --- YKT6 --- snoRNA --- 2′-O-methylation --- pseudouridylation --- malignant melanoma --- cancer stem cell --- stemness --- head and neck squamous cell carcinoma --- colon cancer --- cancer stem cells --- microRNAs --- deformability --- PARP --- replication stress --- targeted therapy --- breast cancer --- circulating biomarkers --- medulloblastoma --- brain tumour --- subgroups --- stem cells --- n/a --- 2'-O-methylation

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

MicroRNAs (miRs) are small noncoding RNAs that function as post-transcriptional regulators of gene expression and have important roles in almost all biological pathways. Deregulated miR expression has been detected in numerous cancers, where miRs act as both oncogene and tumor suppressors. Due to their important roles in tumorigenesis, miRs have been investigated as prognostic and diagnostic biomarkers and as useful targets for therapeutic intervention. From a therapeutic point of view, two modalities can serve to rectify gene networks in cancer cells. For oncomiRs, a rational means is downregulation through antagomirs. Moreover, observations of the pathological reductions in tumor-suppressive miRs have inspired the concept of “miR replacement therapy” to enhance the amount of these miRs, thereby restoring them to normal levels. However, the clinical applicability of miR-based therapies is severely limited by the lack of effective delivery systems. Therefore, to understand the role of this new class of regulators, we need to identify the mRNA targets regulated by individual miRs as well as to develop specific, efficient, and safe delivery systems for therapeutic miRs.

Breast cancer --- Hypoxia inducible factor 1-alpha (HIF-1α) --- MicroRNA (miRNA) --- miR526b --- miR655 --- Oxidative stress --- Migration --- Cyclooxygenase-2 (COX-2) --- Prostaglandin E2 receptor 4 (EP4) --- PI3K/Akt --- adipokines --- endometrial cancer --- estrogens --- hyperinsulinemia --- insulin --- insulin resistance --- insulin signaling --- insulin-like growth factors --- microRNA --- miRNA --- ovarian cancer --- survival --- prognostic factor --- serum LDH --- blood biomarker --- circulating microRNA --- plasma --- immunotherapy --- immune checkpoint inhibitors --- metastatic melanoma --- hepatocellular carcinoma --- metastasis --- exosome --- bioinformatics analysis --- renal cancer --- RCC --- ccRCC --- meta-analysis --- miRNAs --- normal B-cell development --- B-CLL --- miRNA-transcription factor network --- regulation --- biomarker --- therapy --- prognosis --- diagnosis --- progression --- prediction --- smoking --- non-small cell lung cancer --- methylation --- miR-584-5p --- YKT6 --- snoRNA --- 2′-O-methylation --- pseudouridylation --- malignant melanoma --- cancer stem cell --- stemness --- head and neck squamous cell carcinoma --- colon cancer --- cancer stem cells --- microRNAs --- deformability --- PARP --- replication stress --- targeted therapy --- breast cancer --- circulating biomarkers --- medulloblastoma --- brain tumour --- subgroups --- stem cells --- n/a --- 2'-O-methylation