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A glial circadian gene expression atlas reveals cell-type and disease-specific reprogramming in response to amyloid pathology or aging

2 weeks 5 days ago
While circadian rhythm disruption may promote neurodegenerative disease, the impact of aging and neurodegenerative pathology on circadian gene expression patterns in different brain cell types remains unknown. Here we used a translating ribosome affinity purification to identify the circadian translatomes of astrocytes, microglia and bulk tissue in healthy mouse cortex and in the settings of amyloid-β plaque pathology or aging. We show that glial circadian translatomes are highly...
Patrick W Sheehan

A glial circadian gene expression atlas reveals cell-type and disease-specific reprogramming in response to amyloid pathology or aging

2 weeks 5 days ago
While circadian rhythm disruption may promote neurodegenerative disease, the impact of aging and neurodegenerative pathology on circadian gene expression patterns in different brain cell types remains unknown. Here we used a translating ribosome affinity purification to identify the circadian translatomes of astrocytes, microglia and bulk tissue in healthy mouse cortex and in the settings of amyloid-β plaque pathology or aging. We show that glial circadian translatomes are highly...
Patrick W Sheehan

Unravelling the association between internet use and loneliness among Chinese older adults during the COVID-19 pandemic: the role of potentially moderating and mediating factors

2 weeks 5 days ago
CONCLUSIONS: These findings highlight the potential of Internet use as an intervention to mitigate loneliness among older adults during major public health crises, such as the COVID-19, by promoting social participation and online social contact. This provides an implication for developing strategies to support the older population during future crises.
Xu Zong

Dietary patterns of Filipino older adults and associated factors: analysis of the 2013 National nutrition survey and 2018-2019 expanded National nutrition survey

2 weeks 5 days ago
CONCLUSION: Our study showed that the dietary patterns of older adults in the Philippines were associated with sociodemographic factors, lifestyle, and nutritional status. This study sheds light on understanding better the role of sex, age, SES, educational attainment, and lifestyle factors, nutritional status in influencing dietary patterns of older adults. Our findings make a valuable contribution in crafting specific and timely nutrition-focused interventions for the older population in...
Robby Carlo Tan

Amyloid precursor protein and C99 are subunits in human microglial Hv1 channels that enhance current and inflammatory mediator release

2 weeks 5 days ago
In Alzheimer's disease (AD), hyperactivated microglia produce inflammatory mediators that contribute to neuroinflammation and neuronal damage. Amyloid precursor protein (APP), a transmembrane protein expressed in many cell types, including neurons and microglia, plays a critical role in AD pathogenesis via its secretase-mediated processing to release the C-terminal 99-residue transmembrane fragment (C99) that is further cleaved to yield amyloid-β peptides. Voltage-gated proton channels (Hv1)...
Ruiming Zhao

Lamin A/C loss promotes R-loop-mediated genomic instability and poor survival in small-cell lung cancer

2 weeks 5 days ago
Lamin A/C (LMNA), a key component of the nuclear envelope, is essential for maintaining nuclear integrity and genome organization [W. Xie et al., Curr. Biol. 26, 2651-2658 (2016)]. While LMNA dysregulation has been implicated in genomic instability across cancer and aging, the underlying mechanisms remain poorly understood [S. Graziano et al., Nucleus 9, 258-275 (2018)]. Here, we define a mechanistic role for LMNA in preserving genome stability in small-cell lung cancer (SCLC), a malignancy...
Christopher W Schultz