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Strategies for blood-brain barrier rejuvenation and repair

3 weeks 1 day ago
Blood-brain barrier (BBB) dysfunction is a hallmark of many diseases of the brain, including those that represent the largest healthcare burden (for example, Alzheimer disease and stroke). Despite this, rejuvenation and repair of the BBB is not a mainstream concept. During life, the BBB is subjected to perturbations and stresses from a wide range of endogenous or exogenous sources, which can promote brain health or can lead to brain pathologies. The BBB supports many functions that are critical...
Peter C Searson

Intestinal macrophages modulate synucleinopathy along the gut-brain axis

3 weeks 1 day ago
Emerging evidence suggests that Parkinson's disease (PD) may have its origin in the enteric nervous system (ENS), from where α-synuclein (αS) pathology spreads to the brain^(1-4). Decades before the onset of motor symptoms, patients with PD suffer from constipation and present with circulating T cells responsive to αS, suggesting that peripheral immune responses initiated in the ENS may be involved in the early stages of PD^(1,5-7). However, cellular mechanisms that trigger αS pathology in the...
Sebastiaan De Schepper

Strategies for blood-brain barrier rejuvenation and repair

3 weeks 1 day ago
Blood-brain barrier (BBB) dysfunction is a hallmark of many diseases of the brain, including those that represent the largest healthcare burden (for example, Alzheimer disease and stroke). Despite this, rejuvenation and repair of the BBB is not a mainstream concept. During life, the BBB is subjected to perturbations and stresses from a wide range of endogenous or exogenous sources, which can promote brain health or can lead to brain pathologies. The BBB supports many functions that are critical...
Peter C Searson

Lamin A/C-regulated cysteine catabolic flux modulates stem cell fate through epigenome reprogramming

3 weeks 1 day ago
Spatiotemporal changes in the nuclear lamina and cell metabolism shape cell fate, yet their interplay is poorly understood. Here we identify lamin A/C as a key regulator of cysteine catabolic flux essential for proper cell fate and longevity. Its loss in naive mouse pluripotent stem cells leads to upregulation of the cysteine-generating and catabolizing enzymes, cystathionine γ-lyase (CTH) and cystathionine β-synthase (CBS), thereby promoting de novo cysteine synthesis. Increased cysteine flux...
Yinuo Wang

Radiation-tolerant atomic-layer-scale RF system for spaceborne communication

3 weeks 1 day ago
Integrated circuits for communications play an enabling role when it comes to outer-space exploration thanks to their small footprint and low weight^(1-3). However, owing to the severe irradiation effects of space energetic particles, the implementation of radiation-tolerant electronic circuits remains a challenge^(4-6). Here we report the observation of the space radiation effect on a satellite-based device and find that atomically thin materials are expected to accumulate minimal...
Liyuan Zhu