Exercise works wonders throughout the human body, including the brain.
Research suggests an array of neurological benefits, such as reducing the brain’s biological age, enhancing learning and memory, and protecting against dementia.
Now, a new study offers one of the clearest glimpses yet into a suspected mechanism: after a single 20-minute session of light-to-moderate cycling, people showed changes in memory-linked brain activity.
By tracking nearly every movement of a tiny fish’s life from adolescence to death, a new Science study reveals a hidden behavioral blueprint of aging—one that can predict a fish’s age or how long an individual will live.
Mapping behavior of individual vertebrate animals across lifespan could provide an unprecedented view into the lifelong process of aging. We created a platform for high-resolution continuous behavioral tracking of the African killifish across natural lifespan from adolescence to death. We found that animals follow distinct individual aging trajectories. The behaviors of long-lived animals differed markedly from those of short-lived animals, even relatively early in life, and were linked to organ-specific transcriptomic shifts. Machine-learning models accurately inferred age and even forecasted an individual’s future lifespan, given only behavior at a young age. Finally, we found that animals progressed through adulthood in a sequence of stable and stereotyped behavioral stages with abrupt transitions, revealing precise structure for an architecture of aging.
In the study, researchers tracked fluorescently tagged resident macrophages in mouse eyes. Long-lived resident tissue macrophages were concentrated in the trabecular meshwork and Schlemm’s canal, whereas steady-state monocyte-derived macrophages were abundant around distal vessels.
When they selectively removed these cells, the eye’s drain became clogged, fluid built up, and eye pressure increased and was linked to aberrant extracellular matrix turnover in the resistance-generating tissues of the trabecular meshwork.
“Our findings show that resident macrophages are essential for maintaining healthy eye pressure,” said the author. “Disruption of this system may contribute directly to the development of glaucoma.”
This discovery could lead to the development of future glaucoma treatments. The next step is to do research that identifies these resident macrophages in human eye tissue. ScienceMission sciencenewshighlights.
When the eye’s drainage system clogs, pressure builds up and causes damage. The pressure can lead to glaucoma and vision loss.
New research published in the journal Immunity, reveals that a specialized set of immune cells act as the cleanup crew, pointing to a promising new target for therapies to prevent a major cause of blindness.
https://doi.org/10.1172/JCI195784 Sylvie Alonso & team develop a nasal vaccine booster that induces robust and sustained, cross-clade systemic and mucosal protective immunity in COVID19 mRNA vaccinated populations.
1Infectious Diseases Translational Research Programme, Department of Microbiology and Immunology, Yong Loo Lin School of Medicine and.
2Immunology Programme, Life Sciences Institute, National University of Singapore, Singapore.
3Monash Biomedicine Discovery Institute, Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria, Australia.
Surgeries are increasingly opening patients’ brains to research. But the opportunities that come with this intimate access also raise complex ethical issues.
Learn more during BrainAwarenessWeek.
Invasive treatments give scientists an intimate view of neural activity, but ethicists worry about mixing research and medical care.
Bulk and single-cell transcriptomics are widely used to characterize diseases and cellular states but remain underexplored for de novo drug discovery. Here, we present a strategy to screen and optimize compounds by matching disease transcriptomic profiles with compound-induced transcriptomic features predicted from chemical structures using a deep-learning model.
ColorectalCancer liver metastasis detection timing—synchronous vs early or late metachronous—was not independently associated with overall survival after adjustment, supporting treatment planning guided by tumor burden and treatment feasibility.
Question Is the timing of colorectal cancer liver metastasis (CRLM) detection, defined as synchronous, early metachronous, or late metachronous, associated with overall survival?
Findings In this cohort study of 1,250 patients, synchronous CRLM initially appeared to be associated with worse survival; however, timing of detection was not an independent factor after adjusting for tumor number, size, variant status, carcinoembryonic antigen levels, and treatment strategy. The ability to undergo local treatment had the greatest association with improved survival.
Meaning These findings suggest synchronicity is not independently associated with a survival benefit and may instead be indicative of underlying tumor biology, with synchronous metastases occurring earlier in the disease course.
Inflammatory gene transcription regulation.
While we recognize that inflammatory responses are essential for immunity to microbial infections, it is evident from clinical proof that these responses must be properly controlled to prevent potential detrimental consequences.
Over the past decades, multiple immunosuppressive mechanisms have been identified at distinct levels, including mechanisms that target immune receptor complexes and regulate signal transduction.
However, the molecular mechanisms by which inflammatory gene transcription is precisely finetuned remain poorly defined.
Here, the author highlight that a comprehensive understanding of how the ubiquitination–deubiquitination process directly controls the transcription of inflammatory genes may reveal novel avenues for therapeutic intervention.
Finally, the review provides insight into the importance of understanding the spatiotemporal regulation of inflammatory gene transcription at the gene specific level. sciencenewshighlights ScienceMission https://sciencemission.com/inflammatory-gene-transcription
The team recruited 14 patients between 17 and 50 years of age, to participate. After a brief warmup, participants rode a stationary bike for 20 minutes at a pace they could maintain for the duration. Researchers recorded the participants’ brain activity before and after the cycling session using intracranial electroencephalography (iEEG), which utilizes implanted electrodes to measure neural activity in the brain. The recordings showed an increased rate of ripples originating in the hippocampus and connecting with cortical regions of the brain known to be involved in learning and memory performance.
“We’ve known for years that physical exercise is often good for cognitive functions like memory, and this benefit is associated with changes in brain health, largely from behavioral studies and noninvasive brain imaging,” says the study’s corresponding author. “By directly recording brain activity, our study shows, for the first time in humans, that even a single bout of exercise can rapidly alter the neural rhythms and brain networks involved in memory and cognitive function.”
The author says the results apply beyond the epileptic patients who participated. ScienceMission sciencenewshighlights.
A single session of physical exercise can spawn a boost of neural activity in brain networks that underlie learning and memory, according to a new study.
The researchers measured neural activity in the brains of patients with epilepsy before and after they completed a bout of physical exercise. The results showed that a single exercise session produced in the participants a burst of high-frequency brain waves, called ripples, emanating from the hippocampus to areas of the brain involved in learning and recall.
Neuroscientists have documented ripples relevant to memory in mice and rats, but they had not confirmed the link in humans, mainly because electrodes need to be implanted in the brain to obtain recordings. Instead, researchers had theorized the ripples’ role in humans, based on studies in people that measured changes in oxygenated blood in the brain after exercise. This new study marks the first time researchers have been able to see the neurons in action in people following exercise, the authors report.