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

3 months 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

3 months 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

3 months 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

3 months 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

3 months 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

3 months 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

Rewarding touch limits lifespan through neural to intestinal signaling

3 months ago
In multicellular organisms, sensory perception affects many aspects of behavior and physiology. Perception of environmental stressors like food scarcity often leads to physiological changes that promote survival and slow aging. However, recent work shows that perception of attractive food smells can block the health benefits of dietary restriction in multiple model organisms. While it is known that sensory perception and cell nonautonomous signaling can modulate health and longevity, our...
Elizabeth S Kitto

What Changes First? Mapping the Temporal Ordering of Age-related Functional Decline Across Domains Using 30-year Longitudinal Data

3 months ago
CONCLUSION: The study offers insights into early detection and prevention strategies for healthy aging. Assuming that physical and cognitive domains are primarily driven by age-related biological changes, our findings support theories proposing that biological changes precede functional decline, and theories emphasizing the importance of psychosocial resilience. Moreover, this study highlights the potential of adopting a complex systems approach and innovative within-person analytical methods in...
Gabriela Lunansky