New study from Wenxing Qin, Yuran Duan, Zhiqiang Hu, Yueru Hou, Daqian Xu and colleagues (Zhejiang University School of Medicine) unveils a novel mechanism by which the metabolic enzyme PCK1 hinders cGAS-STING activation by competitively consuming GTP, consequently fostering tumor immune evasion.
This study unveils a novel mechanism by which the metabolic enzyme PCK1 hinders cGAS-STING activation by competitively consuming GTP, consequently fosterin.
Analysis of circulating tumour DNA (ctDNA) is commonly used for molecular profiling in patients with advanced-stage non-small-cell lung cancer (NSCLC). The authors of this Review summarize the available evidence on the potential utility of incorporating ctDNA in the management of those with early stage and locally advanced NSCLC and propose interventional studies to provide the necessary additional evidence.
Radiologically, Chiari malformation type I (CM-I) is characterized by cerebellar tonsil herniation of at least 5 mm through the foramen magnum. In symptomatic cases, posterior fossa decompression (PFD) surgery is often performed and improves symptoms in approximately 75% of patients. However, the surgery involves risks, and identifying which candidates will benefit from surgery is important. It has previously been shown that the amount of tonsillar descent does not correlate with symptom severity or surgical outcomes. The authors hypothesized that using advanced neuroimaging methods to directly measure CSF flow and brain motion will give insights regarding which patients have the greatest likelihood of cerebral dynamic improvements from surgery.
Here, the authors evaluated 108 CM-I patients (age 19–70 years), 61 of whom underwent PFD surgery. The authors used phase-contrast MRI to measure CSF flow/stroke volume and cine displacement encoding with stimulated echoes (DENSE) imaging to measure brain motion, with a goal to predict postsurgical cerebral dynamic improvements from presurgical images.
The authors found that CSF stroke volume increased after PFD surgery by 28.9% (p = 0.014), brainstem motion decreased after surgery by 17.3% (p = 0.002), and cerebellum motion decreased 45.2% (p < 0.001). Notably, the amount of CSF flow increase after surgery had no relationship to tonsillar descent (R = 0.059, p = 0.767) but did relate to the amount of presurgical CSF flow (R = −0.518, p = 0.005). Likewise, improvements to brain motion were better predicted by the amount of presurgical motion (brainstem, R = −0.638, p < 0.001; cerebellum, R = −0.878, p < 0.001) than by tonsillar descent (brainstem, R = −0.312, p = 0.093; cerebellum, R = −0.620, p < 0.001).
A new study suggests a nasal spray developed to target neuroinflammation could one day be an effective treatment for traumatic brain injury (TBI). By studying the effects of the nasal anti-CD3 in a mouse model of TBI, researchers found the spray could reduce damage to the central nervous system and behavioral deficits, suggesting a potential therapeutic approach for TBI and other acute forms of brain injury. The results are published in Nature Neuroscience.
The study examines the monoclonal antibody Foralumab, made by Tiziana, which has been tested in clinical trials for patients with multiple sclerosis, Alzheimer’s disease, and other conditions.
Multiple experiments were done in mouse models with moderate-to-severe traumatic brain injury to explore the communication between regulatory cells induced by the nasal treatment and the microglial immune cells in the brain. Over time, researchers were able to identify how they modulate immune response.
In addition to assessing the effects of the treatment, the research team was able to learn about immune response over time and compare the immune responses and effects of TBI in the mice.
The next step in the research is to translate the findings from preclinical models to human patients.
Laura Trachsel-Moncho, Anne Simonsen and colleagues (Universitetet i Oslo (UiO)) identify the endosomal protein SNX10 as a modulator of piecemeal mitophagy of OXPHOS machinery components and mitochondrial homeostasis. They show that loss of SNX10 enhances mitochondrial protein degradation, reduces respiration, and increases ROS levels, leading to elevated cell death in vivo.
Trachsel-Moncho et al.
This article is available under a Creative Commons License (Attribution 4.0 International, as described at https://creativecommons.org/licenses/by/4.0/).
Scientists have identified the 1N4R tau isoform as a key driver of Alzheimer’s.
Alzheimer’s disease is a progressive neurological disorder that primarily affects older adults, leading to memory loss, cognitive decline, and behavioral changes. It is the most common cause of dementia. The disease is characterized by the buildup of amyloid plaques and tau tangles in the brain, which disrupt cell function and communication. There is currently no cure, and treatments focus on managing symptoms and improving quality of life.
I predict most of humanity will be living in space habitats by the end of century and the beginning of the 22nd century O’Neil colonies and generation ships will be built out of hollowed out asteroids and it will be like james blish cities in space and George zebrowskis macrolife the colonizing of the galaxy.
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Centenarians, once considered rare, have become commonplace. Indeed, they are the fastest-growing demographic group of the world’s population, with numbers roughly doubling every ten years since the 1970s.
How long humans can live, and what determines a long and healthy life, have been of interest for as long as we know. Plato and Aristotle discussed and wrote about the ageing process over 2,300 years ago.
The pursuit of understanding the secrets behind exceptional longevity isn’t easy, however.
Rab5 is a cellular GTPase essential for endocytic clearance of invading pathogens. This study from Shino Tanaka, Hiromu Oide, Tomoko Kubori, Kohei Arasaki (Tokyo University of Pharmacy and Life Sciences) and colleagues reveals that the bacterial pathogen Legionella pneumophila ubiquitinates Rab5 to recruit a Rab5 inactivator RabGAP-5 to its phagosome, thereby excluding Rab5 and facilitating its intracellular replication.
