Results 101 to 110 of about 346,273 (274)

Somatic Pairing in Drosophila virilis Mitosis [PDF]

, 1975
In neuroblast cells homologous chromosomes tend to pair during prophase of mitosis. Heterochromatic elements of homologous chromosomes are widely separated in very early prophase, at which time the euchromatin is poorly stained.
Guest, William C.
core   +2 more sources

Nucleolar Organization in Response to Transcriptional Stress

Cancer Science, EarlyView.
In this review, we provide an overview of the research field on nucleolar regulation, mainly focusing on nucleolar organization under transcriptional stress. We also highlight the importance of ribosomal DNA stability, particularly in disease prevention, including cancer.
Rikiya Imamura, Takaaki Yasuhara
wiley   +1 more source

PhpCNF-Y transcription factor infiltrates heterochromatin to generate cryptic intron-containing transcripts crucial for small RNA production

Nature Communications
The assembly of repressive heterochromatin in eukaryotic genomes is crucial for silencing lineage-inappropriate genes and repetitive DNA elements. Paradoxically, transcription of repetitive elements within constitutive heterochromatin domains is required
Manjit Kumar Srivastav, H. Diego Folco, Patroula Nathanailidou, Anupa T Anil, Drisya Vijayakumari, Shweta Jain, Jothy Dhakshnamoorthy, Maura O’Neill, Thorkell Andresson, David Wheeler, Shiv I. S. Grewal   +10 more
doaj   +1 more source

Hypertranscription of rDNA Responsible for Nucleolar Remodelling is a Doorman for Acquiring Pluripotency

Cell Proliferation, EarlyView.
Active nucleoli have the capability to release perinuclear heterochromatin, which is a novel event of iPSC reprogramming. ABSTRACT Ribosome biogenesis occurs within the nucleolus, with the initial step being the transcription of ribosomal DNA (rDNA). Although rDNA transcription is limited in somatic cells, it is more active in stem cells. Nevertheless,
Yuchen Sun, Xinglin Hu, Xingwei Huang, Wenyao Zhou, Shubing Lan, Hui Zhang, Guangming Wu, Lei Lei   +7 more
wiley   +1 more source

Constitutive Heterochromatin Differentiation and Evolutionary Divergence of Karyotype in Oriental Anopheles (Cellia) [PDF]

, 1988
Analysis of the mitotic karyotype of two clusters of closely related species of oriental Anopheles, the A . balabacensis and A. maculatus complexes, has revealed interspecific differences in the amount and distribution of constitutive heterochromatin,
Baimai, Visut
core  

Interaction of TFAP2A with the Ku70/80 complex is crucial for HIF‐dependent activation of hypoxia‐inducible genes

The FEBS Journal, EarlyView.
Under normoxic conditions, the SUMOylated fraction of TFAP2A cannot interact with the Ku70/Ku80 complex, nor it can bind to chromatin. The unSUMOylated fraction pre‐occupies the chromatin of a subset of hypoxia‐induced genes together with the Ku70/Ku80 complex for basal euchromatin formation. Under hypoxic conditions, the SUMOylation equilibrium shifts
Amalia Kanoura, Antonis Giakountis, Chrysa Filippopoulou, Angeliki Karagiota, George Stamatakis, Martina Samiotaki, George Panayotou, George Simos, Georgia Chachami   +8 more
wiley   +1 more source

Comparative analyses of SUV420H1 isoforms and SUV420H2 reveal differences in their cellular localization and effects on myogenic differentiation. [PDF]

PLoS ONE, 2010
BACKGROUND:Methylation of histone H4 on lysine 20 plays critical roles in chromatin structure and function via mono- (H4K20me1), di- (H4K20me2), and trimethyl (H4K20me3) derivatives.
Leanna W K Tsang, Ninghe Hu, D Alan Underhill   +2 more
doaj   +1 more source

Overcoming BET‐inhibitor JQ1 resistance in aggressive non‐small cell lung cancer by inducing ferroptosis via inhibition of the BRD2–FTH1 axis

The FEBS Journal, EarlyView.
Recent studies emphasize alternative functions of FTH1 relevant for nuclear processes, such as transcriptional regulation. This study shows a novel FTH1/BRD2 association in non‐small cell lung carcinoma (NSCLC). This nuclear interaction affects BRD2 protein stability in aggressive NSCLC cells.
Stefania Scicchitano, Cinzia Garofalo, Beatrice Stella, Gianluca Santamaria, Flora Cozzolino, Vittoria Monaco, Flavia Biamonte, Maria Monti, Eleonora Vecchio, Maria Concetta Faniello   +9 more
wiley   +1 more source

Ageing versus developmental silencing: Answers from the epigenome

The FEBS Journal, EarlyView.
It is easier for young animals to regenerate damaged or missing tissues. In this Viewpoint, we propose that this is, in part, attributed to epigenetic changes, with chromatin becoming more closed and inaccessible as animals age. The timing of when this occurs differs depending on the tissue—some during the late developmental stages and others at the ...
Kirsten C. Sadler, Mekayla A. Storer, N. Sumru Bayin   +2 more
wiley   +1 more source

Quantitative Analysis of Constitutive Heterochromatin in Couples with Fetal Wastage

American Journal of Reproductive Immunology, 1997
PROBLEM: Heteromorphism of constitutive heterochromatin is a stable evolutionary feature that is thought to cause no phenotypic alterations. Nevertheless, the role of constitutive heterochromatin is still unknown. The instability of constitutive heterochromatin was generally restricted to T‐lymphocytes and was associated with variable immunodeficiency.
Ljiljana Randić, A. Radojcic Badovinac, Ivica Vlastelić, Alena Buretić-Tomljanović   +3 more
openaire   +5 more sources