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MRI reveals cerebrospinal fluid shifts after mild brain injury

Researchers at University of Tsukuba have found that cerebrospinal fluid (CSF) microdynamic motion shows region-specific alterations after mild traumatic brain injury (TBI). Using a specialized magnetic resonance imaging (MRI) technique, the team noninvasively visualized these CSF changes, which have been difficult to quantify with conventional imaging. The approach is expected to advance the understanding of the relationship between post-traumatic brain conditions and cognitive function. The study is published in Frontiers in Neuroscience.

The brain contains cerebrospinal fluid (CSF), which protects neural tissue and helps clear metabolic waste. Rather than being static, CSF exhibits continuous subtle motion, and this motion is thought to be closely linked to brain health. However, little has been known about how CSF motion is altered after a mild head injury.

The researchers employed a specialized magnetic resonance imaging (MRI) technique known as intravoxel incoherent motion (IVIM) MRI to evaluate CSF microdynamic motion through the incoherent movement of water molecules. The results showed that, after mild traumatic brain injury (TBI), CSF motion increased in some brain regions and decreased in others.

T cells secrete DNA to boost the immune system’s cancer-fighting ability

Activated immune cells secrete tiny capsules bearing DNA that can enter other immune and tumor cells to stimulate the body’s defense systems, according to a study led by investigators at Weill Cornell Medicine. The discovery extends the scientific understanding of the immune system, identifies a new strategy for boosting immunity against cancers and potentially offers a new tool for delivering genetic payloads to other cells.

Most animal cells secrete tiny capsules known as extracellular vesicles—nanoscale, membrane-bound particles—whose cargo can include proteins, snippets of DNA and other molecules. In the new study, published April 30 in Cancer Cell, the researchers discovered that vesicles secreted by activated T cells —major weapons of the immune system—carry DNA that enters immune cells and nearby tumor cells to enhance the immune response against the tumor. Preclinical experiments showed that this vesicle-associated DNA could be useful therapeutically, boosting T cell attacks against tumors that otherwise evoke little or no immune response.

“These findings reveal a natural mechanism for treating immunologically silent tumors and other diseases that stem from insufficient immune surveillance,” said study co-senior author Dr. David Lyden, the Stavros S. Niarchos Professor in Pediatric Cardiology and a member of the Gale and Ira Drukier Institute for Children’s Health and the Sandra and Edward Meyer Cancer Center at Weill Cornell Medicine.

Tackling the active antibiotic-resistant bacteria in soils

Antibiotic-resistant bacteria in soils.

Soil antibiotic-resistance genes (ARGs) originate from diverse anthropogenic inputs and undergo complex ecological and evolutionary processes that determine their persistence and mobility in terrestrial ecosystems.

Advanced monitoring strategies combining high-throughput DNA-based and single-cell functional techniques enable precise profiling of total and active ARGs in soil matrices.

A tiered risk assessment framework is proposed, integrating ARG mobility, host pathogenicity, and human exposure to support decision-making in One Health contexts.

Multi-barrier mitigation strategies – including source control and ecological bioremediation – offer scalable and synergistic solutions to reduce the risk of dissemination of soil ARGs. sciencenewshighlights ScienceMission https://sciencemission.com/antibiotic-resistant-bacteria-in-soils

Soils are critical reservoirs of antibiotic-resistance genes (ARGs) and antibiotic-resistant bacteria (ARB), serving as interfaces among human, animal, plant, and environmental microbiomes. While many studies have profiled soil ARGs, most rely on DNA-based methods that cannot distinguish total from metabolically active ARB, limiting risk assessment and mitigation. This review outlines soil ARG sources, their mobility, and potential transmission to plants and the food chain. We highlight advances in community-and single-cell-level approaches for characterizing active ARB and explore emerging mitigation strategies such as advanced waste treatment and bioremediation. This review aims to bridge the gap between ARG pollution and its risk mitigation, contributing to a comprehensive framework for tackling active ARB in soils.

Continue reading “Tackling the active antibiotic-resistant bacteria in soils” | >

Firehorse superstition helps uncover why women’s education may not drive Japan’s fertility decline

The rapidly declining marriage and fertility rates across developed East Asian societies strain pension and health care systems, threaten economic growth, and reshape entire societies. To tackle this issue, governments in Japan and across East Asia have invested heavily in pronatalist measures, but often with limited success. For instance, Japan’s government has repeatedly expanded childcare subsidies and parental leave provisions, yet the total fertility rate hit a record low of 1.20 in 2024.

A common narrative in media commentary, policy circles, and even within families is that women are “too educated” or “too career-focused” to marry and have children. However, the exact causal relationship between women’s education level and family formation is not well understood.

To fill this knowledge gap, a team of researchers from Japan and Singapore, led by Associate Professor Rong Fu from the Faculty of Commerce, Waseda University, Japan, used a novel quasi-experimental approach to understand the relationship between education, fertility, and marriage in Japan.

Phage immunoprecipitation sequencing is a powerful technique that can quantify antibody binding to all known viruses, human proteome, bacterial toxins, and allergens

https://doi.org/10.1172/jci.insight.203645 Here, Aaron A.R. Tobian & team use this method to evaluate antibody repertoires in kidney donors with and without HIV, reporting that antibodies against adenovirus infection in kidney donors with HIV may be associated with allograft rejection.

2Department of Pathology, School of Medicine, and.

3Department of Medicine, School of Medicine, The Johns Hopkins University, Baltimore, Maryland, USA.

4Division of Allergy, Immunology and Transplantation, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland, USA.

AI tool may spot ADHD years before children are diagnosed

Attention-deficit/hyperactivity disorder (ADHD) affects millions of children, yet many go years without a diagnosis, missing the chance for early support that can change long-term outcomes even when early signs are present. In a new study, Duke Health researchers found that artificial intelligence tools can analyze routine electronic health records to accurately estimate a child’s risk of developing ADHD years before a typical diagnosis. By reviewing patterns in everyday medical data, the approach could help flag children who may benefit from earlier evaluation and follow-up.

The research, published in Nature Mental Health, highlights how powerful insights can come from information already collected during regular health care visits to help support early decision making by primary care providers.

“We have this incredibly rich source of information sitting in electronic health records,” said Elliot Hill, lead author of the study and data scientist in the Department of Biostatistics & Bioinformatics at Duke University School of Medicine.

Specially designed material combines light and electricity to remove PFAS from water without harmful byproducts

Researchers at Clarkson University have reported a breakthrough in tackling per- and polyfluoroalkyl substances (PFAS), a group of widely used “forever chemicals” that are difficult to remove from water and have raised growing environmental and public health concerns. The study, published in Nature Communications, was led by Associate Professor Yang Yang and his team in the Department of Civil and Environmental Engineering. It presents a new method for breaking down PFAS that could improve the treatment of contaminated water in real-world conditions.

Detecting multiple cancers and other diseases from a single blood sample

UCLA scientists have developed a simple and cost-effective blood test that, in early studies, shows promise in detecting multiple cancers, various liver conditions and organ abnormalities simultaneously by analyzing DNA fragments circulating in the bloodstream. The test, described in the journal Proceedings of the National Academy of Sciences, could offer a powerful and more affordable approach to early disease detection and comprehensive health monitoring.

“Early detection is crucial,” said Dr. Jasmine Zhou, the study’s senior author, a professor of pathology and laboratory medicine and investigator at the UCLA Health Jonsson Comprehensive Cancer Center. “Survival rates are far higher when cancers are caught before they spread. If you detect cancer at stage one, outcomes are dramatically better than at stage four.”

How the MethylScan blood test works The new method, called MethylScan, works by analyzing cell-free DNA (cfDNA), tiny fragments of genetic material released into the blood when cells die. Because cells from every organ shed DNA into the bloodstream, cfDNA carries molecular signals that reflect what is happening throughout the body.

CERN’s Medipix3 technology on track to help more patients

Originally derived from a technology developed to explore the fundamental nature of the Universe, Medipix3 technology now powers a medical scanner that is on track to benefit an increased number of patients. MARS Bioimaging Ltd has received 510(k) clearance from the US Food and Drug Administration (FDA) for its portable photon-counting CT scanner for upper-limb imaging, allowing the system to enter the US health sector and enable broader clinical adoption.

Medipix technology is based on hybrid pixel detectors, which were originally designed at CERN for particle detection in high-energy physics experiments. This technology was adapted to create the Medipix family of pixel detector readout chips, enabling a new approach to medical imaging.

Unlike conventional CT (computed tomography) systems – which combine X-ray measurements taken from different angles to produce a 3D image – photon-counting technology measures individual X-ray photons and their energy. This produces detailed, three-dimensional images that help clinicians to distinguish between different types of tissue and materials, better informing their decision making. As Dr John Carrino, a prominent musculoskeletal radiologist involved in clinical trials with MARS Bioimaging, notes: “Photon-counting CT is going to be the future of CT for medical imaging.”

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