News and analysis

Macrophages from omental metastases released IL-1α and pushed mesothelial cells toward a more mesenchymal state. In laboratory models, this remodeling made it easier for ovarian cancer cells to cross the mesothelial barrier.

A 3-year-old with chemotherapy-resistant metastatic hepatoblastoma had complete regression after two infusions of GPC3-targeted CAR T cells engineered to express IL-15 and IL-21. The response lasted at least 12 months.

Loss of TET2 leaves single-stranded gaps behind DNA replication and makes cells more vulnerable to PARP inhibition. The study traces a possible path from altered DNA chemistry to breaks in the genome.

Breast fat cells produce the lipid signal 9S-HODE, which can drive ferroptosis in cancer cells. In obesity, this signal is reduced, potentially removing one of the local restraints on breast tumor growth.

Inhibitory neurons and glioma interact in an unexpected way: GABAergic signals reduced calcium activity in tumor cells and restrained tumor growth in mouse models.

Researchers found disrupted monocyte production in the bone marrow in Alzheimer’s disease. In a mouse model, blocking type I interferon signaling restored myelopoiesis and reduced disease pathology.

Researchers identified PLA2G2D as an immune brake concentrated in tumour-draining lymph nodes. Blocking it expanded tumour-specific T cells and slowed tumour growth in mouse models, including alongside anti-PD-1 treatment.

Mice consuming about 30% fewer calories accumulated fewer somatic mutations across several tissues. Unexpectedly, the largest reduction appeared in relatively inactive regions of the genome.

Longitudinal MRI data from 1,095 participants showed clear cortical gray matter reductions across puberty and pregnancy, while the menopausal transition produced a strikingly different pattern.

Google DeepMind has launched AlphaGenome Atlas, a resource that precomputes the likely molecular effects of roughly 9 billion possible single-letter DNA changes in the human genome. It is not a clinical answer key, but it could dramatically speed up variant prioritization.

Psilocybin given before chemotherapy protected peripheral nerves in mice. The effect was linked to preservation of mitochondrial transport along sensory nerve fibers.

Inherited sequence patterns within telomeres help determine the length of individual chromosome ends. Removing these variants with CRISPR changed the length of one specific telomere.

PRMT7 acts as an internal restraint on antitumor CD8+ T cells. Removing it enhanced T-cell activation and tumor control in mice, while an experimental PRMT7 degrader produced similar effects in human cells.

In mice, Helicobacter pylori triggered a signaling relay between epithelial cells, immune cells, and fibroblasts. The result was a regenerative gastric state whose gene activity resembled early developmental tissue.

Trypanosoma congolense affects both sides of transmission: it alters volatile cues from infected hosts and molecular sensory programs in tsetse flies. Field trapping showed that infection-associated odors drew more infected flies.

In mouse models of ovarian cancer, early disseminating tumor cells disproportionately seeded later metastases and helped cells arriving afterward establish themselves. Tumor-intrinsic IFNγ signaling was a key part of this early adaptation.

Tumors can use the antioxidant enzyme PRDX1 as an immune suppressor, removing reactive oxygen species that T cells need for signaling. In mouse models, loss of PRDX1 strengthened antitumor immunity and improved responses to checkpoint therapy.

Why does acute pain sometimes persist after an injury? In mice, researchers traced a pathway from altered oligodendrocyte metabolism and myelin disruption to Aβ42 production—and were able to block the transition to persistent pain.

A study of more than a million people identified 1,260 genetic variants associated with the Big Five personality traits. The genetic signal is robust, but DNA still predicts an individual’s personality only poorly.

Loss of the actin regulator CRACD triggers a signaling cascade that raises PD-L1 and weakens antitumor immunity. The mechanism was demonstrated in organoids and mice, with a CRACD–PD-L1 association also found in human tumors.

Mycobacterium abscessus in non-small cell lung tumors was associated with an APOBEC mutational signature. Experimental models traced the effect to bacterial NDK, IRF3 signaling, and sustained APOBEC3A activation.

An analysis of 25,306 samples from 40 tissues found that structural aging is not uniform across the body. Vascular tissues changed fastest in the 30s, while other organs accelerated later or in two distinct phases.

After widespread DNA breaks in glioblastoma cells, changes in 3D genome organization, gene expression and epigenetic marks remained detectable for at least two weeks.

A study of hundreds of meningiomas identified a DNA methylation signature linked to progression risk and connected it mechanistically to epigenetic silencing of clustered protocadherins and β-catenin localization.

Cas12a2 was programmed to recognize mutant RNA and then damage chromatin inside the same cell. The system selectively impaired cancer cells carrying certain EGFR and TP53 mutations and showed antitumor activity in mice.

Doctors injected mitochondria isolated from a 26-year-old patient’s own muscle into both eyes. Vision did not measurably recover, but objective pupillary responses to light temporarily returned after treatment.

A computer-vision system analysed live endoscopic video during pituitary surgery. In the first six-patient series it ran successfully in four cases, with no AI-attributable complications, but clinical benefit has not yet been established.

Chemically modified suppressor tRNA helped cells read through premature stop codons and restore full-length CFTR in preclinical cystic fibrosis models without editing genomic DNA.

In an analysis of more than 572,000 people with pancreatic cancer risk factors, GLP-1 users had fewer diagnoses of the disease. The association was substantial, but the observational design cannot establish a preventive effect.

A new study suggests that after brief intestinal inflammation, the extracellular matrix can stay altered for more than a year and keep reshaping how stem cells repair the gut lining. That may help explain how short-term damage can turn into chronic disease.

Certain TP53 mutations may help tumors hide from innate immunity. The study links mutant p53 to RBM28, reduced double-stranded RNA, weaker interferon signaling, and resistance to immune checkpoint blockade.

Cells temporarily suppress many DNA-repair pathways during mitosis. A Cell study shows that DDIAS protects exposed single-stranded DNA and is particularly important for developing neural cells.

Repeated mild mechanical injury left human astrocytes in a persistently altered state. Their lipid output changed, and medium from the injured cells impaired human neurons in an in-vitro model.

An experimental mutant-KRAS vaccine was tested in 20 people at inherited high risk of pancreatic cancer. Ninety percent developed a specific T-cell response, with some vaccine-induced T-cell clones persisting for up to two years.

In mouse models, alcohol changed the cellular origins and immune state of liver cancer arising with metabolic disease. Tumors followed different developmental routes and responded differently to PD-1 blockade.

In experimental models, astrocytes transferred mitochondria to glioblastoma cells. The exchange helped dormant tumor cells re-enter the cell cycle while making them more resistant to immune attack.

Former NIAID senior adviser David Morens pleaded guilty in a case involving hidden federal records about coronavirus research. The trail includes a private Gmail account, a research grant, wine and a scientific commentary on COVID-19 origins.

Isoleucine and valine feed a metabolic signalling pathway in prostate cancer cells that increases cholesterol and androgen production and may help tumours adapt to androgen deprivation.

Longitudinal MRI data show that cognitively healthy people who later became amyloid-positive had a relatively thicker cortex and slower age-related thinning, with differences detectable years before PET positivity.

In COMMIT, adding mFOLFOX6 chemotherapy and bevacizumab to atezolizumab improved disease control in dMMR/MSI-H metastatic colorectal cancer, but substantially increased serious toxicity.

Across three preregistered experiments in 57 healthy volunteers, focusing attention on sensations at a histamine skin-test site reduced the local inflammatory response compared with distraction.

Oral vitamin D has produced little consistent benefit in chronic lung disease. A new Perspective argues that direct delivery to the airways may be worth testing, based on mechanistic and preclinical evidence.

In an observational cohort, 122 participants reported an 84.4% clinical benefit rate after six months on ivermectin plus mebendazole. But without a control group, verified imaging, and with substantial loss to follow-up, the study cannot establish efficacy.

In the phase 3 RASolute 302 trial, daraxonrasib was compared with standard chemotherapy in 500 patients with previously treated metastatic pancreatic cancer. Median overall survival was 13.2 months versus 6.7 months.

A remarkably preserved Archaeopteryx fossil reveals previously unseen feathers near the upper wing. By closing a gap between the wing and body, they may have helped create an effective aerodynamic surface for flight.

A deep-learning framework called Melody learned to predict methylation patterns from 10-kb DNA sequence windows across 39 normal human cell types, while a transcriptome-informed version extended the approach to unseen cell types.

Liquid biopsy does not sample the genome uniformly. Across 317 cfDNA samples, researchers mapped reproducible “penumbra” regions with reduced representation that may weaken signals from clinically relevant cancer loci.

Certain gut bacteria convert tryptophan into a metabolite that inhibited HIV and cytomegalovirus in cell models. In human cohorts, the same bacterial pathway was associated with several viral outcomes, but causality remains unproven.

Researchers programmed CRISPR-Cas9 to distinguish one of three copies of chromosome 21 and promote its loss in trisomic human cells. The study is a compelling proof of concept, not a treatment for Down syndrome.

The DREAM complex suppresses DNA-repair genes. Its activity has now been linked to somatic mutation burden, mammalian lifespan and the severity of age-related neuropathology.

A mathematical model asks how long humans might live if every other ageing mechanism were removed. Somatic mutation mainly limited lifespan through poorly renewable cells in the brain and heart.

An analysis of 953 bacterial and archaeal genomes suggests that LUCA had an incomplete enzymatic metabolism. The study links earlier metabolic chemistry to native metals and phosphite in serpentinizing hydrothermal systems.

The FDA has granted accelerated approval to a genetically engineered HSV-1 oncolytic therapy combined with nivolumab for advanced melanoma after anti-PD-1 treatment failure. The regulatory efficacy analysis showed a 24.2% response rate.

A dCas13-based system lengthened the regulatory tail of SPSB1 mRNA, restored MHC-I on tumour cells and improved checkpoint therapy responses in two mouse models of prostate cancer.

Frog-cell xenobots can generate new motile aggregates without dividing. The study reveals a form of kinematic self-replication driven by movement, cell gathering, and body geometry rather than genetic modification.

Focused ultrasound can mechanically destroy small liver tumors without an incision or thermal ablation. One-year HOPE4LIVER data reveal both the potential of histotripsy and important limitations, including an unexpected challenge in interpreting follow-up imaging.

Researchers at UC Berkeley made five people see a hue called olo that cannot be produced by ordinary light. The study does not reveal a new part of the spectrum, but a new percept created by directly stimulating specific cone cells in the retina.

Circular DNA outside chromosomes can assemble into nuclear clusters. A polymer model and experiments in colorectal cancer cells show how these structures selectively strengthen regulatory contacts involving MYC.

The FDA has approved mFlusiva, the first U.S. seasonal mRNA flu vaccine for adults 50 and older. In a large phase 3 trial, it prevented more confirmed flu cases than a standard-dose vaccine, but the headline 26.6% figure is a relative difference.

One of four participants in the first HG302 trial for Duchenne muscular dystrophy died after receiving the high dose. Available evidence points to a severe immune response to systemic AAV delivery rather than demonstrated CRISPR off-target editing.

In mouse models, pregnancy raised adenosine levels and created an immunosuppressive environment in the lungs and liver that favored metastasis. Similar blood changes appeared in healthy pregnant women, but cancer patients were not studied.

Gedatolisib combined with endocrine therapy extended median progression-free survival from 2.0 months to 7.4–9.3 months. The FDA has approved it for advanced breast cancers without a detected PIK3CA mutation.

New cancer drugs can extend survival while safety systems remain better at detecting acute severe events than months of rash, diarrhea, fatigue, impaired daily functioning and emotional distress.

A subset of pancreatic tumours uses GSK3β–NFATc1 signalling to activate DNA repair. The subtype was linked to early recurrence and platinum resistance, but the treatment evidence remains preclinical and the patient cohort was small.

A deep-learning model replaced a single brain-age estimate with a detailed regional map, revealing distinct patterns in healthy aging, mild cognitive impairment and Alzheimer’s disease.

An antisense oligonucleotide reduced GFRAL in the hindbrain of tumor-bearing mice. The animals retained more muscle and fat, recovered strength, and survived longer, although the drug was delivered directly into the brain.

Gut microbes altered how liver macrophages captured nanoparticle drugs. In mice, microbiome remodeling prolonged circulation, increased tumor delivery and strengthened responses to nanomedicine-based chemotherapy.

A 61-year-old woman developed cognitive decline, hallucinations, seizures and severe loss of independence over five years. The underlying cause was impaired vitamin B12 absorption, and treatment restored much of her cognitive and everyday functioning.

A recent Bourbon virus infection was confirmed in a Suffolk County patient through a sharp rise in neutralizing antibodies. The study reveals how rare tick-borne viruses can remain hidden behind more familiar diagnoses.

LINE-1 does not always complete a conventional insertion. Cell experiments show that its unfinished DNA copies can recombine with distant chromosome breaks or with one another, producing translocations, inversions and deletions.

Fat accumulation in the liver may steer colorectal cancer metastases toward a more aggressive replacement growth pattern. The study links this effect to MYC stabilization, proline synthesis and collagen production, primarily in preclinical models.

A single-cell analysis of hippocampal tissue from 40 adults aged 20 to 95 revealed a major midlife shift in microglial identity, a declining proportion of astrocytes, and weakening three-dimensional genome organization.

Pancreatic tissue from 68 organ donors revealed that obesity is associated with denser cytotoxic resident T cells and a shift toward inflammatory macrophages that form tightly connected cellular neighborhoods.

A woman taking semaglutide developed a dense gastric bezoar. Doctors used an unusual treatment—about 1.5 liters of diet cola per day—and the mass was no longer present on repeat endoscopy.

Cas12a2 does not behave like a conventional gene editor: it recognizes tumour-associated RNA and triggers chromatin destruction in the same cell. The method reduced tumour burden in mice but remains an early experimental platform.

An analysis of two CAR T-cell trials links inherited variants in STXBP2, ADAMTSL3, and PTPN22 to inflammatory toxicity and the expansion of therapeutic cells after infusion.

Engineered CAR T cells were given an extra defence against an immune-suppressing signal from liver tumours. The phase I trial showed tumour shrinkage, but responses were often brief.

Across 611 childhood tumour genomes, researchers identified mutational scars left by earlier treatment. Platinum drugs produced the clearest imprint, sometimes detectable within three months.

Thymulin, a peptide produced by the thymus, reduced age-related myeloid inflammation in mice, slowed mammary tumor growth, and restored responsiveness to anti-PD-L1 therapy. Human evidence was limited to observational and ex vivo analyses.

With age, the immune system not only responds less effectively to infection but also sustains chronic inflammation. A major review examines how aged immune cells may spread dysfunction to other organs.

MRI scans of retired collision- and combat-sport athletes revealed persistent blood–brain barrier disruption. The most extensive leakage was associated with poorer cognition and immune abnormalities.

A network of neurons inside the heart helps regulate cardiac function locally. In mice, one subset of these neurons protected the heart from stress-related dysfunction.

An analysis of 87 Homo skulls found that larger braincases and smaller faces fit neutral evolution and stasis better than sustained directional selection.

TNG961 degraded HBS1L and caused tumor regression in preclinical models of FOCAD-deleted cancer, including a PRMT5 inhibitor-resistant model.

An experimental antibody blocked a tumour-promoting receptor mechanism and reduced prostate cancer growth and metastasis in mice. Human testing has not yet been performed.

Two cups of coffee may look similar while containing quite different mixtures of chemicals. A large UK Biobank analysis suggests that those differences may also matter for biological aging.…

Carbon dioxide is normally treated as a waste gas that the body needs to expel. Yet brief, carefully controlled increases in CO₂ produced a different effect in the brain: blood vessels…

Two years after surgery for pancreatic cancer, a three-centimeter mass appeared in the wall of a 70-year-old woman’s stomach. It sat precisely where a biopsy needle had previously passed.…

Half of a person’s nuclear DNA comes from the mother and half from the father. Yet most of our cells contain another, much smaller genome that follows a different inheritance pattern. This…

mRNA vaccines have a confirmed rare adverse effect: inflammation of the heart muscle or its surrounding membrane, seen most often in younger males after a second dose. One of the most…

CAR T cells were engineered to resist liver cancer’s stop signal A solid tumour can display a convenient target to immune cells while simultaneously telling them to stand down. That…

When an attached cell activates its self-destruct program, it does not simply vanish. As the cell contracts and pulls away from the surrounding surface, it leaves behind a thin patch of…

Pancreatic cancer has a molecular engine found in almost every tumor: RAS. For decades, the protein was considered exceptionally difficult to drug. Its surface offered few pockets where a…

The same diet produced opposite outcomes in two neighboring parts of the gut. In mice genetically predisposed to intestinal tumors, a ketogenic diet accelerated adenoma formation in the…

In October 1587, Francesco I de’ Medici, Grand Duke of Tuscany, suddenly developed a severe fever. He died a few days later. His wife, Bianca Cappello, died at nearly the same time. It…

Glioblastoma is difficult to treat not only because it grows rapidly. Most drugs penetrate the brain poorly because it is protected by the blood–brain barrier — a tightly sealed cellular…