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The interdependence of chromatin states and transcription factor (TF) binding in eukaryotic genomes is critical for the proper regulation of gene expression. In this study, we explore the connection between TFs and chromatin states in the human malaria parasite, , throughout its 48-hour asexual intraerythrocytic developmental cycle (IDC). Most genes are expressed in a periodic manner during the IDC, accompanied by dynamic shifts in histone modifications and chromatin accessibility. Leveraging genome-wide profiles of chromatin accessibility, histone modifications, and Heterochromatin Protein 1 (HP1) occupancy, we characterize chromatin state dynamics during the IDC. Our results indicate that several chromatin states remain stable throughout the lifecycle, while others are dynamic and are linked to gene activation or repression. We further characterize chromatin state dynamics at the genome-wide DNA binding sites for a selection of TFs, allowing us to group TFs according to their chromatin preferences. By correlating changes in chromatin accessibility, histone modifications, and TF binding, we provide a global overview of the chromatin state dynamics that coordinate asexual blood stage development.
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http://dx.doi.org/10.1101/2025.08.22.671872 | DOI Listing |
Front Pharmacol
August 2025
General Surgery Department Three, Gansu Province Central Hospital, Lanzhou, China.
Fast and early detection of low-dose chemical toxicity is a critical unmet need in toxicology and human health, as conventional 2D culture models often fail to capture subtle cellular responses induced by sub-toxic exposures. Here, we present a bioengineered three-dimensional (3D) electrospun nanofibrous scaffold composed of polycaprolactone that enhances chromatin accessibility and primes fibroblasts for improved sensitivity to low-dose chemical stimuli in a short period. The scaffold mimics the extracellular matrix, providing topographical cues that reduce cytoskeletal tension and promote nuclear deformation, thereby increasing chromatin openness.
View Article and Find Full Text PDFCurr Drug Targets
September 2025
Hubei Key Laboratory of Tumor Microenvironment and Immunotherapy, China Three Gorges University, Yichang, 443002, China.
Double homeobox A pseudogene 9 (DUXAP9), also known as long intergenic non-coding RNA 1296 (LINC01296) and lymph node metastasis-associated transcript 1 (LNMAT1), is an emerging lncRNA encoded by a pseudogene. It has been reported to be upregulated in various tumor types and functions as an oncogenic factor. The high expression of DUXAP9 is closely related to clinical pathological features and poor prognosis in 16 types of malignant tumors.
View Article and Find Full Text PDFProtoplasma
September 2025
Vavilov Institute of General Genetics RAS, Moscow, Russia.
Large interstitial telomeric regions are considered remnants and markers of chromosomal rearrangements or a result of several suggested molecular mechanisms of telomere repeats accumulation. More rare are cases when large interstitial repeats are found not close to, but at a distance from the centromere. However, synapsis, recombination, and effects on chromatin near these regions during meiotic prophase I have not been sufficiently studied.
View Article and Find Full Text PDFCardiovasc Res
September 2025
Center for Cardiovascular Research, Division of Cardiology, Department of Medicine, Washington University in Saint Louis, St. Louis, MO, USA.
Aims: Although the ability of the heart to adapt to environmental stress has been studied extensively, the molecular and cellular mechanisms responsible for cardioprotection are not yet fully understood. In this study, we sought to elucidate these mechanisms for cytoprotection using a model of stress-induced cardiomyopathy.
Methods And Results: We administered Toll-like receptor (TLR) agonists or diluent to wild-type mice and assessed for cardioprotection against injury from a high intraperitoneal dose of isoproterenol (ISO) administered 7 days later.
J Clin Invest
September 2025
State Key Laboratory of Molecular Oncology, National Cancer Center/National, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China.
Pancreatic cancer (PC) is notoriously resistant to both chemotherapy and immunotherapy, presenting a major therapeutic challenge. Epigenetic modifications play a critical role in PC progression, yet their contribution to chemoimmunotherapy resistance remains poorly understood. Here, we identified the transcription factor ZEB1 as a critical driver of chemoimmunotherapy resistance in PC.
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