Results 51 to 60 of about 81,802 (259)

Position effect variegation (PEV) as an aging clock: visualization of age-dependent loss of heterochromatin and longevity associated with enhanced heterochromatin

Scientific Reports
The heterochromatin loss model of aging suggests there is an age-dependent reduction in epigenetic factors that form and maintain the heterochromatin state of chromosomes.
Sesley Tedeschi, Talia Takahashi, Yash Vyavahare, Emma Clark, Logan Deutschmann, Raynord Leung, Kat Stanley, Liam C. Hunt   +7 more
doaj   +1 more source

Navigating heterochromatin [PDF]

, 2003
The condensed structure of heterochromatin differs significantly from euchromatin and DNA bound in heterochromatin is generally not transcriptionally active. Transcriptional silencing allows the control of gene expression and affords a novel mechanism of
Fuerst, Peter
core   +1 more source

Histone H4 lysine 12 acetylation regulates telomeric heterochromatin plasticity in Saccharomyces cerevisiae. [PDF]

PLoS Genetics, 2011
Recent studies have established that the highly condensed and transcriptionally silent heterochromatic domains in budding yeast are virtually dynamic structures. The underlying mechanisms for heterochromatin dynamics, however, remain obscure.
Bo O Zhou, Shan-Shan Wang, Yang Zhang, Xiao-Hong Fu, Wei Dang, Brian A Lenzmeier, Jin-Qiu Zhou   +6 more
doaj   +1 more source

Chronobiology of Cancer: How Aging Fuels Oncogenesis at the Molecular Level

Aging and Cancer, EarlyView.
This graphical abstract illustrates the key biological pathways linking aging with cancer development and progression. In the upper left, cumulative exposure to ultraviolet radiation, toxins, and reactive oxygen species (ROS) causes DNA damage and genomic instability, whereas age‐related decline in repair mechanisms, such as ATM/ATR, BER, and NER ...
Anu Singh, Aroonima Misra, Sufian Zaheer
wiley   +1 more source

Overcoming Artificial Structures in Resolution‐Enhanced Hi‐C Data by Signal Decomposition and Multi‐Scale Attention

Advanced Science, EarlyView.
Deep‐learning‐based signal enhancement is an effective way to recover high‐resolution details from a low‐resolution chromatin contact map. However, due to computational challenges, existing methods commonly divide up the contact map into small patches and create artificial discontinuities at patch boundaries.
Qinyao Li, Kelly Yichen Li, Chiara Nicoletti, Stephen Kwok‐Wing Tsui, Pier Lorenzo Puri, Qin Cao, Kevin Y. Yip   +6 more
wiley   +1 more source

Histone crosstalk directed by H2B ubiquitination is required for chromatin boundary integrity [PDF]

, 2011
Genomic maps of chromatin modifications have provided evidence for the partitioning of genomes into domains of distinct chromatin states, which assist coordinated gene regulation.
West, A., Ma, M.K-W., Adam G West, Heath, C., Carol Heath, Adam G. West, Meiji Kit-Wan Ma, Hair, A., Alan Hair, West Adam G., Heath Carol, Ma Meiji Kit-Wan, Hair Alan   +12 more
core   +2 more sources

Targeting the KAT7/H3K14ac/RAC2 Axis Mediates OXPHOS to Promote Stemness Maintenance and Malignancy in Glioblastoma

Advanced Science, EarlyView.
SOX2 upregulates KAT7 in glioma stem cells, where KAT7 deposits H3K14 acetylation at the RAC2 promoter to activate RAC2 transcription. RAC2‐GTP subsequently promotes PAK1/2/3 phosphorylation, increasing tricarboxylic acid cycle flux and mitochondrial respiration to support glioblastoma malignancy.
Jilong Liu, Yanfei Sun, Yuehua Zhu, Guangjing Mu, Jiazheng Wang, Liangliang Wang, Feihu Zhao, Zhimin Zhao, Jian Wang, Ying He, Zheng Jiang, Xingang Li, Mingzhi Han, Bin Huang   +13 more
wiley   +1 more source

Lactylation‐Driven PROS1‐TYRO3‐CARF Signaling Promotes Therapy‐Induced Senescence Escape and Radioresistance in Meningioma

Advanced Science, EarlyView.
A glycolysis‐driven epigenetic switch promotes therapy resistance in meningioma. Increased lactate production enhances histone H3K27 lactylation, which activates PROS1 secretion. Secreted PROS1 engages TYRO3 signaling to degrade the senescence regulator CARF, allowing cancer cells to escape growth arrest.
Zhuohang Wang, Qixiang Zhang, Keman Liao, Xiaoyu Liu, Hongchi Zhang, Yunsheng Chen, Yuxiao Ma, Yikui Liu, Aoqian Xu, Yuhao Sun, Jiayi Chen, Liuguan Bian, Baofeng Wang   +12 more
wiley   +1 more source

Ring-like distribution of constitutive heterochromatin in bovine senescent cells. [PDF]

PLoS ONE, 2011
BACKGROUND: Cells that reach "Hayflick limit" of proliferation, known as senescent cells, possess a particular type of nuclear architecture. Human senescent cells are characterized by the presence of highly condensed senescent associated heterochromatin ...
Andrey Pichugin, Nathalie Beaujean, Xavier Vignon, Yegor Vassetzky   +3 more
doaj   +1 more source

Decoding Biomolecular Phase Separation: From Physiological Roles to Pathological Mechanisms and Therapeutic Biomaterials Design

Advanced Science, EarlyView.
This review systematically elaborates on the mechanisms underlying physiological regulation and pathological dysregulation of biomolecular phase separation. It also summarizes advances in phase‑separation‑targeted therapeutic strategies and the design of functional biomaterials inspired by this process.
Jiawei Zhu, Jingbo Dong, Qiufang Gong, Xuejiao Song, Zhifa Shen, Chao Liang   +5 more
wiley   +1 more source