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Microglial APOE3 Christchurch protects neurons from Tau pathology in a human iPSC-based model of Alzheimer's disease

4 months ago
Alzheimer's disease (AD) is the most prevalent neurodegenerative disorder characterized by extracellular amyloid plaques and neuronal Tau tangles. A recent study found that the APOE3 Christchurch (APOECh) variant could delay AD progression. However, the underlying mechanisms remain unclear. In this study, we established neuron-microglia co-cultures and neuroimmune organoids using isogenic APOE3 and APOECh microglia derived from human induced pluripotent stem cells (hiPSCs) with PSEN1 mutant...
Guoqiang George Sun

Age-Related Trajectories of Health Decline Among Immigrants and Natives in Europe: The Effect of Education

4 months ago
Background: The ability to age healthily is highly dependent on individual characteristics that include gender, social class, a range of biological and contextual factors, and migrant background. Indeed, immigration has changed the demographic composition and social structure of many European countries, generating an increasing interest in how societies, and immigrants in particular, are aging. Research Design: This paper compares the age-related trajectories of health decline in three health...
Aïda Solé-Auró

A mutation in DNA polymerase gamma harbours a shortened lifespan and high sensitivity to mutagens in the filamentous fungus Neurospora crassa

4 months ago
Hyphal elongation is the vegetative growth of filamentous fungi, and many species continuously elongate their hyphal tips over long periods. The details of the mechanisms for maintaining continuous growth are not yet clear. A novel short lifespan mutant of N. crassa that ceases hyphal elongation early was screened and analyzed to better understand the mechanisms for maintaining hyphal elongation in filamentous fungi. The mutant strain also exhibited high sensitivity to mutagens such as...
Ryouhei Yoshihara

Integrative pathway analysis across humans and 3D cellular models identifies the p38 MAPK-MK2 axis as a therapeutic target for Alzheimer's disease

4 months ago
Alzheimer's disease (AD) presents a complex pathological landscape, posing challenges to current therapeutic strategies that primarily target amyloid-β (Aβ). Using a novel integrative pathway activity analysis (IPAA), we identified 83 dysregulated pathways common between both post-mortem AD brains and three-dimensional AD cellular models showing robust Aβ42 accumulation. p38 mitogen-activated protein kinase (MAPK) was the most upregulated common pathway. Active p38 MAPK levels increased in the...
Pourya Naderi Yeganeh

Piezo1 exacerbates inflammation-induced cartilaginous endplate degeneration by activating mitochondrial fission via the Ca<sup>2+</sup>/CaMKII/Drp1 axis

4 months ago
Mitochondrial homeostasis plays a crucial role in degenerative joint diseases, including cartilaginous endplate (CEP) degeneration. To date, research into mitochondrial dynamics in IVDD is at an early stage. Since Piezo1 is a novel Ca^(2+)-permeable channel, we asked whether Piezo1 could modulate mitochondrial fission through Ca^(2+) signalling during CEP degeneration. In vitro and in vivo models of inflammation-induced CEP degeneration were established with lipopolysaccharide (LPS). We found...
Zhidi Lin

Trajectories of cognitive function and frailty in older adults in China: a longitudinal study

4 months ago
CONCLUSION: Our findings suggest a co-development pattern between cognitive function and frailty in Chinese older adults aged 55 years and above. While cognitive impairment may be irreversible, frailty is a condition that can be potentially reversed. Early detecting is crucial in preventing cognitive decline, considering the shared trajectory of these conditions.
Xiaoyi Ji

Optoelectronic metadevices

4 months ago
Science, Volume 386, Issue 6725, November 2024.
Son Tung Ha, Qitong Li, Joel K. W. Yang, Hilmi Volkan Demir, Mark L. Brongersma, Arseniy I. Kuznetsov