Scientists restored the CCNA2 gene in adult human heart cells, enabling them to divide and form new functional cardiomyocytes—advancing heart repair therapies.
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Molecular mechanisms in liver repair and regeneration: from physiology to therapeutics
Ma, X., Huang, T., Chen, X. et al. Molecular mechanisms in liver repair and regeneration: from physiology to therapeutics. Sig Transduct Target Ther 10, 63 (2025). https://doi.org/10.1038/s41392-024-02104-8
Brain implant helps man with paralysis regain movement
A brain implant used for the first time is helping a patient with paralysis regain use of his limbs. The use of artificial intelligence is helping in the process, also making it possible for the man to feel objects again. NBC News’ Sam Brock reports.
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Diaphragmatic EMG Findings in a Patient With Radiation-Induced Myopathy of the Hemidiaphragm
(video at link)
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Elevated mtDNA copy number in older adults is linked to methylation of mitochondrial and nuclear regulatory regions
Growing evidence shows that epigenetic modification and mitochondrial dysfunction are hallmarks of aging and are associated with the development of a wide range of age-related diseases. Mitochondrial biogenesis, which is marked by mitochondrial DNA copy number (mtDNAcn), is one of the major regulations of mitochondrial function by a set of transacting elements, including mitochondrial DNA polymerase gamma (POLG), working on the mtDNA control region. In this study, we investigated the mtDNAcn and the methylation status at both mtDNA control and POLGA promoter regions in human blood cells from individuals with a wide range of ages. A total of 119 blood samples were collected, including 24 umbilical cord blood samples from newborns and 95 peripheral blood samples from individuals aged 18 to 96 years.
Allosteric binding site for anthraquinones at the human P2X4 receptor
Sarcomas comprise a heterogeneous group of malignant neoplasms that include genomically simple and genomically complex subtypes. This consensus provides guidelines for efficient, rational use of next-generation sequencing in their clinical management.
This consensus review establishes guidelines for the rational and efficient use of next-generation sequencing−based technology in the clinical management of sarcoma.
Altered regional brain activity underlying the higher postoperative analgesic requirements in abstinent smokers: A prospective cohort study
New in JNeurosci from Wei, Tao, Bi et al: Smokers who have quit their nicotine use have altered brain activity linked to heightened pain sensitivity and a need for more postoperative pain relief.
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Perioperative abstinent smokers experience heightened pain sensitivity and increased postoperative analgesic requirements, likely due to nicotine withdrawal-induced hyperalgesia. However, the underlying neural mechanisms in humans remain unclear. To address this issue, this study enrolled 60 male patients (30 abstinent smokers and 30 nonsmokers) undergoing partial hepatectomy, collecting clinical data, smoking history, pain-related measures, and resting-state functional magnetic resonance imaging (rs-fMRI). Compared to nonsmokers, abstinent smokers showed lower pain threshold and higher postoperative analgesic requirements. Neuroimaging revealed altered brain function in abstinent smokers, including reduced fractional amplitude of low-frequency fluctuations (fALFF, 0.01 – 0.1 Hz) in the ventromedial prefrontal cortex (vmPFC), increased regional homogeneity (ReHo) in the left middle occipital gyrus, and decreased functional connectivity (FC) between the vmPFC to both the bilateral middle temporal gyrus and precuneus. Preoperative pain threshold was positively correlated with abstinence duration and specific regional brain activities and connectivity. Further, the observed association between abstinent time and pain threshold was mediated by the calcarine and posterior cingulate cortex activity. The dysfunction in vmPFC and left anterior cingulate cortex was totally mediated by the association between withdrawal symptoms and postoperative analgesic requirements. These findings suggest that nicotine withdrawal might alter brain functional activity and contribute to hyperalgesia for the abstinent smokers. This study provided novel insights into the supraspinal neurobiological mechanisms underlying nicotine withdrawal-induced hyperalgesia and potential therapeutic targets for postoperative pain in abstinent smokers.
Significance statement Abstinent smokers experienced heightened pain and require more analgesics after surgery, yet the underlying neural mechanisms remain poorly understood. This prospective cohort study identified altered regional brain activity associated with reduced pain thresholds and increased postoperative analgesic requirements in abstinent smokers. We found specific brain regions that were functionally altered and correlated with pain-related outcomes, which mediated the relationship between abstinence and pain-related behaviors. These findings provided novel insights into the supraspinal mechanisms of nicotine withdrawal-induced hyperalgesia and point to potential therapeutic targets for improving postoperative pain management in abstinent smokers.
A tale of two forms of cohesin in DNA repair
Extrusive and cohesive cohesin cooperate to repair double-strand breaks in DNA.
Learn more in a new Science Perspective.
Jiazhi Hu Authors Info & Affiliations
Science.
Celebrating two decades of global scientific computing
Imagine a planetary computer capable of storing and processing hundreds of petabytes of data for the research needs of a worldwide community of scientists. This is the Worldwide LHC Computing Grid (WLCG), which is celebrating its 20th anniversary.
Originally conceived to handle the unprecedented data volumes of the Large Hadron Collider (LHC), the WLCG has evolved into a global network connecting hundreds of computing centres across more than 40 countries. It enables thousands of scientists worldwide to store, process and analyse massive amounts of data in quasi-real time, supporting discoveries in particle physics.
On 8 December, a special event at the CERN Science Gateway brought together the international community that has turned this ambitious project into one of the largest distributed computing collaborations in the world. Key figures from the project highlighted its history, challenges and future prospects. Les Robertson, whose efforts and leadership were instrumental during the early days of the Grid, reflected on how the idea was born and the challenges of building something that had never been done before. It was an ambitious idea for its time, one that required both technological innovation and unprecedented cooperation across countries. Yet this early confidence proved justified: the Grid rapidly moved from concept to reality, paving the way for a new model of large-scale scientific computing.