Articles tagged with Chromatin
Mitotic chromosomes may be formed from pre-existing condensed chromatin domains, known as 'building blocks', rather than being created from scratch during cell division. This view integrates the chromosome scaffold model with modern understanding of condensins and physical forces shaping chromatin.
A new brain atlas reveals that neurons build their identity in the first hours of life, rather than inheriting it from their parent cells. The atlas, which mapped nearly 250,000 fly brain cells, shows that neuronal identity is established through a flexible, modular system involving different DNA switches and regulatory proteins.
Researchers have discovered that plants have a built-in season-meter that integrates past temperatures over distinct timescales, allowing them to forecast seasonal changes. This system, comprising three genes, enables plants to prepare for winter, spring, or autumn, and could be extended to other genes and environmental signals.
A new study reveals that cohesin, a protein complex, prevents local mixing of compact active genome domains in living human cells. This domain organization helps maintain proper gene regulation. The study challenges the simple textbook view of chromatin and provides a revised view of euchromatin.
Dr. Sophie de Vries receives funding to study how plants balance immunity with cooperation, while Dr. Tristan Stöber works on developing AI systems that can build accurate internal models of the world. Professor Elisa Oberbeckmann investigates gene regulation mechanisms.
A new blood-based approach developed by Kumamoto University researchers detects breast cancer recurrence by analyzing nucleosome structure in circulating DNA. The study identified genomic regions associated with treatment resistance and recurrence, promising a low-invasive monitoring method for patients.
A research team discovered an epigenetic mechanism in Aquilaria sinensis cultivar SXY that enables efficient agarwood production. The study found that pre-existing chromatin accessibility prepares metabolic genes for rapid activation after injury, supporting molecular screening for high-yielding cultivars.
A study discovered a possible epigenetic mechanism that primes the 'Shuxinyou' (SXY) cultivar of Aquilaria sinensis for high-yield agarwood production. SXY accumulated more alcohol-soluble resin extract and showed stronger terpenoid biosynthesis after controlled wounding.
A study by Dawood Darbar and colleagues found that rare genetic mutations converge with common genetic variants to disrupt the heart's electrical activity, leading to early-onset atrial fibrillation. This additive effect amplifies the risk of stroke and other cardiovascular complications.
Researchers used AI and single-cell technology to study the 3D genome in brain cells from individuals with Alzheimer's disease. They found increased compartment mingling, reduced gene activity, and altered brain cell organization. The study identifies 3D genome organization as a key layer of Alzheimer's biology.
Researchers found that even losing one copy of the TBX5 gene can drastically derail heart development due to DNA misfolding. The study reveals a new origin for genetic disease, suggesting that small drops in protein levels can scramble the 3D structure of DNA.
Researchers used advanced 3D genome mapping technology to study prostate cancer cells and discovered a new feature of gene control networks that could help fight cancer. The study found that enhancers work cooperatively in 3D networks, with some acting as central hubs that control many genes.
Researchers discovered how ATRX mutations reprogram gene regulation architecture to fuel glioma growth and progression. Targeting genes downstream of ATRX slowed cancer progression in preclinical models.
Researchers discovered that androgen receptor signaling acts as a transcriptional repressor of liver receptor homolog-1 (LRH-1) in prostate cancer. This finding reveals a previously unknown mechanism of gene regulation and highlights the potential for targeting this axis to manage advanced prostate cancer.
Researchers at Bar-Ilan University restored youthful patterns of DNA organization in old mice livers, reversing molecular signs of aging. The study identifies SIRT6 as a powerful protector against age-related chromatin changes.
Researchers from The University of Osaka have discovered a two-factor system that controls stem cell differentiation, involving the stabilization of the CoREST corepressor complex at gene promoters. This process prevents stem cells from drifting towards differentiation and maintaining their pluripotency.
Researchers developed RegVelo, an AI framework that models cellular dynamics and gene regulation to predict cellular fate decisions. The model traces developmental trajectories and simulates regulatory interactions, providing insights into hidden drivers of development and potential therapeutic targets.
A new study reveals that early signs of neurodegeneration in individuals with Down syndrome can be detected as early as birth. Researchers found widespread dysregulation of genes and pro-inflammatory patterns in glial cells, suggesting a critical role for chronic inflammation and cell death in the development of the condition.
Researchers developed a new framework, 'Mollifier Layers,' to tackle challenging inverse PDEs. This advance could benefit fields such as genetics and weather forecasting by inferring hidden forces that produce observable patterns.
Researchers used a new AI-powered computational method to discover that most nucleosomes contain sections of DNA that are partially accessible to the cell. The study found that more than 85% of nucleosomes showed some degree of distortion, with 14 distinct structural states associated with different levels of gene activity.
A specific region of Dicer must be activated to achieve proper cell division and reproduction, a discovery that sheds light on the regulation of this enzyme's critical role in both cancer biology and fertility. This finding opens new avenues for studying how small epigenetic changes contribute to disease.
Researchers at Boston Children's Hospital have identified a mechanism for immune cells to recycle defective or autoreactive antibodies by editing their genes. The new process uses an enzyme called RAG to swap out light chains with nearby new ones, often making them non-defective and functional.
A new study reveals that two key BET proteins, BRD2 and BRD4, perform distinct roles in gene activation. Blocking both simultaneously disrupts the process, producing unpredictable effects. Targeted therapies may be more effective if they distinguish between these roles.
A recent study reveals that linker histone H1 binds to nucleosomes and creates a dynamic, flexible network that condenses chromatin. This new understanding suggests that chromatin behaves like a liquid-like 'glue' rather than a rigid structure.
Researchers discovered Setd8 enzyme preserves retinal progenitor cell flexibility, enabling potential regenerative vision therapies. The study highlights a potential target for repairing damaged retinas, with implications for regenerative medicine and ophthalmology.
A new study by UNC Charlotte scientists has discovered a self-clustering mechanism in the Polycomb protein CBX2 that is essential for initiating gene-repressive condensates and guiding stem cells toward their proper fates. The researchers found that CBX2 clusters recruit two Polycomb repressive complexes, creating multicomponent repres...
The study created a critical framework for understanding the architecture of the genome and its association with gene function in cells. The 4DN Consortium integrated data from over a dozen techniques to compile an extensive catalogue of looping interactions between genes and regulatory elements.
Chromatin accessibility maps reveal that MDS stem cells gradually lose their normal identity and acquire characteristics typical of myeloid progenitors. A 'progenitor score' developed by the team tracks cell movement toward a progenitor-like state, correlating with disease severity and prognosis.
Researchers have captured the most detailed images yet of molecules inside synthetic chromatin condensates, allowing them to understand how these droplet-like structures form and function. The team found that linker DNA length affects structure arrangement, which in turn dictates interactions between chromatin fibers.
Researchers at MBL propose a model for how properties of individual molecules emerge to form liquid droplets called condensates. By combining imaging and computer simulations, they reveal the importance of linker DNA in determining condensate structure.
Researchers found that DNA loops facilitate homologous recombination, a key DNA repair process linked to cancer. These loops enable the repair machinery to scan for an intact copy of the damaged region more efficiently.
Researchers at the University of Texas M. D. Anderson Cancer Center discovered that inflexible DNA within nucleosomes regulates the positioning of INO80, a chromatin remodeling complex. This unique mechanism allows INO80 to position itself on the surface of nucleosomes at the right location.
Cancer researchers at Cold Spring Harbor Laboratory have identified key proteins that determine the behavior of two hard-to-treat carcinomas, pancreatic cancer and tuft cell lung cancer. These findings could lead to new therapies targeting specific vulnerabilities in these cancers.
Researchers have discovered that stress hormones can silence crucial neuronal genes by interacting with long noncoding RNAs and the polycomb repressive complex 2. This mechanism may provide a new understanding of how stress affects gene expression, particularly in relation to synaptic function and calcium signaling.
Researchers have identified a new histone variant, macroH2A1.1, as a potential therapeutic target for treating Acute Myeloid Leukaemia. The study found that targeting this variant is safe for patients and may lead to new treatment options.
Researchers at Chinese Academy of Sciences identify a key gene and protein involved in controlling DNA looping, leading to increased grain yield and nitrogen efficiency. The discovery paves the way for future crop breeding strategies to improve sustainability.
Researchers used CRISPR technology to identify HMGN1, a nuclear binding protein that contributes to trisomy 21-related CHDs. The study found that an overabundance of HMGN1 leads to abnormal heart development and gene expression.
Long-term exposure to fine air pollutants like PM2.5 can impair metabolic health by disrupting the normal function of brown fat through complex epigenetic changes. The study identified two enzymes, HDAC9 and KDM2B, as key drivers of this process.
Telomeres, which cap chromosomes, are inherited from parents in a parent-of-origin effect, with mothers contributing short telomeres and fathers long ones. This process is linked to cancer risk and aging, and researchers hope to study it further using human genome sequencing.
A new '3D genome organizer' has been discovered, crucial for sperm production in mice, and highly expressed in human immune cells and blood cancers. Blocking this complex may slow cancer growth and lead to new infertility treatments.
Scientists have discovered that MYOD protein can act as a gene silencer, clearing out old 'furniture' to reset the cell's identity. This finding challenges dogma and opens up new avenues for understanding cellular reprogramming and regenerative medicine therapies.
Researchers analyzed centromeres in onion, garlic, and Welsh onion using CENH3-targeted antibody to map centromere regions. They found significant variations in size and position/mobility between species, challenging the static view of centromeres.
Scientists have found that nucleosomes act as gatekeepers for p53's molecular partners, controlling its access to the genetic code. This discovery reveals a new layer of regulation over p53's activity and opens possibilities for developing cancer therapies that restore or control p53 function.
By reprogramming chromatin to prevent cancer cells from adapting to evade treatment, researchers have doubled chemotherapy effectiveness in animal experiments. This approach restores cellular memory, making existing drugs more effective against cancer.
Professor Eran Meshorer's groundbreaking research in epigenetics and stem cell biology has uncovered critical insights into chromatin structure and gene expression. His work has broad implications for regenerative medicine, developmental biology, and understanding neurological disorders.
A study on hybrid fish found that allelic genes and testis-specific genes play a crucial role in maintaining fertility, while orphan genes facilitate adaptation to new genetic environments. The research used long-read sequencing and Hi-C technology to construct high-quality genomes for reciprocal hybrids.
Researchers developed an AI system called Image2Reg that can identify genetic perturbations in cell images, potentially leading to new drugs. The system uses machine learning and molecular networks to analyze patterns in chromatin structure, revealing links between genes and their functions.
Researchers used genetic data and computational tools to identify genetic variants associated with asthma, finding differences between childhood- and adult-onset forms of the disease. The study provides insights into potential treatment targets for both types of asthma.
Researchers at King's College London have developed a complex model of molecular 'wear-and-tear' that sheds light on how proteins age. The study found that chromatin, the DNA-protein mix, is more resilient to aging than previously thought, suggesting new avenues for anti-aging treatments.
Researchers use generative AI to predict chromatin structures in single cells, overcoming limitations of existing experimental methods. The technique can generate thousands of structure predictions in minutes, enabling faster study of how 3D genome organization affects gene expression.
Scientists from Gladstone Institutes developed a new method called RASAM, which made a surprising discovery that large sections of newly formed DNA are hyperaccessible for many hours. This finding holds important implications for basic understanding of biology and the development of new medicines.
A UC Riverside-led team, funded by the NIH, aims to uncover molecular factors governing gene regulation and chromatin organization in P. falciparum. The project focuses on long non-coding RNAs, which play a crucial role in regulating gene expression and influencing disease progression.
A new study reveals how transcription factors navigate DNA and chromatin structures to determine cellular identity. Researchers discovered novel DNA elements as genomic signposts guiding TFs to specific genetic switches.
Researchers at Gladstone Institutes and UCSF identified MED12 as a crucial switch that regulates T cell rest and activation. The study found that MED12 promotes rest in resting cells and activation in activated cells, and its removal led to blurred lines between rest and activation.
The study found that DNA packaging sends signals through an unusual pathway, affecting cell division and growth. Chromatin acts as a guide, telling the cell how to read and use the information in the DNA.
Gladstone researchers have identified a complex molecular connection between immune cells and fibroblasts that contributes to fibrosis in the heart, which may lead to new treatments for heart disease and other fibrotic conditions.
Researchers at UC San Diego have developed a faster and more affordable method to study chromatin organization, which influences gene activation and cell function. The droplet Hi-C technique has been successfully deployed to analyze chromatin organization in mouse brain cells and human tumors.
A team of scientists developed an advanced computational technique to predict gene architecture through nucleosome position, combining experimental approaches with machine learning techniques. The study demonstrates that nucleosomal architecture is greatly influenced by DNA sequence information and physical signals.
Researchers at MPI unveiled PLK1's crucial role in replenishing CENP-A proteins per centromere, a process critical for cell division. PLK1 initiates a cascade of events by binding to specific machinery components and inducing phosphorylation changes.
A mouse model study led by Ohio State University researchers reveals the importance of DNA loops and protein complex cohesin in nerve cell regeneration. The study's findings could lead to new treatments for nerve injuries by understanding how chromatin organization affects gene expression.