Skip to main content

Aggregator

Base-modified nucleotides mediate immune signaling in bacteria

6 months 1 week ago
Science, Volume 388, Issue 6745, April 2025.
Zhifeng Zeng, Zeyu Hu, Ruiliang Zhao, Jikai Rao, Mario Rodríguez Mestre, Yanqiu Liu, Shunhang Liu, Hao Feng, Yu Chen, Huan He, Nuo Chen, Jinshui Zheng, Donghai Peng, Min Luo, Qunxin She, Rafael Pinilla-Redondo, Wenyuan Han

Transcriptional regulation by PHGDH drives amyloid pathology in Alzheimer's disease

6 months 1 week ago
Virtually all individuals aged 65 or older develop at least early pathology of Alzheimer's disease (AD), yet most lack disease-causing mutations in APP, PSEN, or MAPT, and many do not carry the APOE4 risk allele. This raises questions about AD development in the general population. Although transcriptional dysregulation has not traditionally been a hallmark of AD, recent studies reveal significant epigenomic changes in late-onset AD (LOAD) patients. We show that altered expression of the LOAD...
Junchen Chen

Chemical imaging delineates Abeta plaque polymorphism across the Alzheimer's disease spectrum

6 months 1 week ago
Amyloid-beta (Aβ) plaque formation in Alzheimer's disease (AD) pathology is morphologically diverse. Understanding the association of polymorphic Aβ pathology with AD pathogenesis and progression is critical in light of emerging Aβ-targeting therapies. In this work, functional amyloid microscopy enhanced by deep learning was integrated with mass spectrometry imaging to delineate polymorphic plaques and to identify their associated Aβ make-up. In both sporadic AD (n = 12) and familial AD (n = 6),...
Srinivas Koutarapu

Self-report and actigraphy measures of sleep and domain-specific cognitive performance in older adults

6 months 1 week ago
Poor sleep is associated with worse cognitive function in older adults. However, nuanced associations between sleep and cognition might be masked by the multidimensional nature of sleep which requires multiple approaches (e.g., self-report and actigraphy) to gain meaningful insight. We investigated associations of sleep with cognition and hypothesized that the most consistent association would be between self-reported sleep duration and actigraphy-measured wake after sleep onset (WASO). We...
Kelsey R Sewell