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CaMK modulates sensory neural activity to control longevity and proteostasis

5 months ago
The impact of neural activity on aging and longevity remains poorly understood, with limited understanding of the specific neuron groups and molecular mechanisms that regulate lifespan. In this study, we uncover a correlation between human longevity and reduced CaMK4 expression in the frontal cortex. We further show that this link is conserved in Caenorhabditis elegans, where the loss of the homolog CMK-1 leads to increased longevity and enhanced proteostasis. These beneficial effects are...
Ranran Zhao

DLK/JNK3 Upregulation Aggravates Hair Cell Senescence in Mice Cochleae via Excessive Autophagy

5 months ago
Cell death mediated by the abnormal activation of autophagy has been observed in many neurodegenerative diseases. Dual leucine zipper kinase (DLK), a member of the mitogen-activated protein kinase cascade, plays a key role in regulating cellular autophagy and the progression of neurodegenerative diseases. However, its role in age-related hearing loss has not been reported. In this study, we found that DLK, phosphorylated c-Jun N-terminal kinase (p-JNK), and JNK3 expression increased in the...
Rui Ding

A cross-sectional study of how high-frequency hearing loss impacts cognitive functions in middle-aged-to-older adults

5 months ago
CONCLUSION: While both speech and higher-frequency hearing loss were associated with poorer cognition, only the former demonstrated effects beyond those of ageing. However, the present study only investigated two frequencies in the higher range, encouraging broader investigation of higher-frequency hearing's cognitive effects in the future.
Dona M P Jayakody