US Measles Cases Surge Past 1,300 as New Mexico Outbreak Offers a Containment Lesson: CIDRAP reports that US measles cases have now climbed to 1,362, up 81 in a week, putting the country on pace to surpass last year’s 2,284 cases, already the highest annual total in 35 years. The CDC says 94% of this year’s cases are outbreak-related, most patients are unvaccinated or of unknown status, and children account for the overwhelming majority of infections. Alongside the national surge, the story highlights a new MMWR report on New Mexico’s 2025 outbreak, which reached 99 cases and one death but was eventually contained through an aggressive public health response. Officials issued repeated alerts, ran mobile vaccination clinics, and drove a 55% increase in MMR uptake. The contrast is clear: measles spreads fast when immunity falters, but coordinated vaccination campaigns still work. (CIDRAP)

Internal Memos Fuel New Covid Vaccine Controversy: A Guardian investigation reports that internal US health agency memos used to justify ending routine Covid vaccine recommendations for healthy children and pregnant people relied on a strikingly thin evidence base. The documents, disclosed through litigation brought by the American Academy of Pediatrics, reportedly cited only a small number of studies while overlooking a much larger body of research supporting vaccine safety and benefit in pregnancy and childhood. Critics quoted in the story, including physicians involved in prior advisory work, argue the memos distorted or selectively framed the evidence and replaced normal expert-driven review with an ideological process. The article also notes broader institutional fallout, including the exclusion of outside specialists and growing tension around vaccine policy under HHS secretary Robert F Kennedy Jr. (The Guardian)

Repeat Expansion Tied to Rare Young-Onset Frontotemporal Dementia: One of the strongest genetics papers of the week identifies a major risk factor for atypical frontotemporal lobar degeneration with ubiquitin-positive inclusions, a rare disorder that often appears as young-onset frontotemporal dementia. Using a genome-wide association study in 59 pathologically confirmed cases and 3,153 controls, researchers found a striking signal on chromosome 15q14, then used long-read sequencing in more than 1,700 individuals to pinpoint a tandem repeat expansion in an intron of GOLGA8A. The study suggests that not all repeat forms are equally dangerous: CT-dimer-rich expansions tracked strongly with disease, while other repeat motifs appeared in the general population without the same risk. It is the kind of result that could sharpen diagnosis and reshape how this obscure dementia subtype is genetically classified. (Nature)

A Drug Already Used With Chemotherapy May Blunt Preleukemic Clone Expansion: A new Nature Genetics paper offers a potentially important translational advance in cancer genomics. Researchers report that the CDK4/6 inhibitor trilaciclib, given alongside chemotherapy across four randomized clinical trials, reduced the treatment-driven expansion of clonal hematopoiesis mutations in DNA-damage-response genes, including TP53. That matters because TP53-mutant clonal hematopoiesis is a known risk factor for therapy-related myeloid neoplasms, one of the most feared late complications of cancer treatment. The team also saw similar protective effects in mouse models, where CDK4/6 inhibition appeared to preserve hematopoietic stem and progenitor cell quiescence and reduce the competitive edge of mutant clones. This is not yet proof that secondary leukemias can be prevented in patients, but it is a clear proof of concept for genetically informed risk mitigation during chemotherapy itself. (Nature)

Ancient Tooth Genomes Rewrite the History of a Cavity-Causing Bacterium: Genome Biology published a fascinating ancient-DNA study showing that Streptococcus mutans, one of the microbes most associated with tooth decay, was part of the human oral microbiota well before agriculture fully transformed diets. Researchers recovered 25 ancient S. mutans genomes from archaeological remains spanning roughly 8,000 years across Eurasia and found evidence of an early radiation rather than a simple post-agriculture emergence. They also identified functional differences between ancient and modern lineages, including virulence-linked features that were absent from the older samples. Particularly notable is the recovery of high-coverage ancient genomes, including one from a 7,500-year-old early European Neolithic farmer. The broader implication is that human-associated microbes have deeper evolutionary histories than the usual “agriculture created them” narrative suggests, even if farming later reshaped their abundance and disease relevance. (Springer)

Multimodal Single-Cell Atlas Work Shows Why More Data Layers Matter: A major Genome Biology study tackled a central problem in modern genomics: how to combine multiple single-cell data types without losing biological meaning. Using kidney cortex tissue as the test case, the researchers integrated 3′ and 5′ scRNA-seq with joint snRNA-seq and snATAC-seq, profiling 119,744 high-quality nuclei and cells from 19 donors. They also introduced an interpretable machine-learning tool called scOMM to compare integration strategies. The key result is that different kinds of integration do different jobs: horizontal integration improved cell-type calling, vertical integration added resolution for hard-to-distinguish states, and global integration performed best for identifying rare and adaptive cell states, including populations missed in earlier kidney atlases. This is the kind of methods paper that may quietly shape many future atlas-scale studies across biomedicine. (PubMed)

Population Genetics Theory Gets a Sharper Model of Stabilizing Selection: Not every important genetics story is clinical. A new PLOS Genetics paper improves the theoretical machinery for understanding how stabilizing selection acts on complex traits. The authors show that the linkage disequilibria rapidly generated by stabilizing selection can slow later allele-frequency changes at individual loci, meaning older formulas may systematically misestimate how quickly rare variants are purged. Using whole-genome simulations, they argue that their revised equations better capture per-generation allele-frequency dynamics than previous approaches. That may sound abstract, but it matters for interpreting the genetic architecture of traits influenced by many variants at once, including many human traits studied through GWAS. Better theory can mean better empirical inference, especially when researchers are trying to detect subtle signatures of selection in noisy genomic data rather than relying only on equilibrium assumptions that may not hold in real populations. (PLOS)

Snowy Bumble Bee Mimicry Traced to a Regulatory Mutation: A vivid new PLOS Genetics study dissects how the snowy bumble bee, Bombus niveatus, repeatedly evolved a striking white color form from an ancestral yellow pattern in Anatolia. By sequencing genomes from both color morphs, researchers tied the change to a regulatory mutation involving a duplication near the developmental gene BarH, which affects pigment and sensory bristle patterning. The work becomes even more interesting because similar white-yellow mimicry transitions in related co-mimicking species seem to arise through different genetic routes, showing that convergent evolution at the visible level does not require the same underlying mutation. The team also analyzed a rare gynandromorph, a bilateral mosaic individual showing both color types, which strengthened the case for the proposed mechanism. It is a sharp reminder that regulatory evolution remains one of the most powerful engines of dramatic biological form. (PLOS)

Safer Large-Scale Genome Writing Moves Closer to Reality: One of the week’s most consequential genome-engineering stories came via a EurekAlert report on a Nature study from Mass General Brigham. The researchers describe a non-toxic way to insert gene-sized DNA into the genome, aimed at a long-standing problem in genetic medicine: many diseases are caused by a huge range of mutations across a single gene, making bespoke correction difficult to scale. Instead of fixing one mutation at a time, the strategy envisions inserting an intact healthy gene copy into a defined genomic site. The group emphasizes that its approach avoids viral vectors and sidesteps dangerous immune responses that often arise when large double-stranded DNA cargoes are delivered. If the method proves robust in follow-up work, it could help push genome editing from highly customized mutation repair toward broader, mutation-agnostic genetic therapies. (EurekAlert!)

Three Amino Acids Dramatically Boost mRNA Delivery and CRISPR Editing: A deceptively simple delivery advance may have outsized implications for gene therapy. According to a EurekAlert release on work published in Science Translational Medicine, adding the amino acids methionine, arginine, and serine to lipid nanoparticle injections boosted mRNA delivery by up to 20-fold and raised CRISPR editing efficiency in mouse lungs from about 20–30% to 85–90% after a single administration. That is notable because lipid nanoparticles already sit at the heart of the mRNA medicine platform, yet one of their biggest weaknesses has been the gap between good performance in dishes and weaker performance in living bodies. If this simple supplement generalizes, it could strengthen not just CRISPR approaches but a wide range of RNA and mRNA therapeutics, including work relevant to diseases like cystic fibrosis where efficient delivery is everything. (EurekAlert!)

Plant Genomics Uncovers 2.3 Million Ancient DNA Control Elements: A strong plant-genomics story this week comes from Phys.org, which reports on a study identifying about 2.3 million conserved non-coding sequences across 284 plant species from 72 families. Ancient regulatory DNA is well documented in animals, but plant genomes—because of repeated duplication and reshuffling—were often thought to preserve such elements less clearly. This work challenges that view by showing that deep regulatory conservation can survive even in extremely dynamic plant genomes. The resulting resource could become important for both evolutionary biology and crop engineering, because these conserved non-coding elements are precisely the sort of sequences that can shape when and where genes turn on. In practical terms, that means a better roadmap for engineering resilience, productivity, and stress tolerance without focusing only on protein-coding genes. (Phys.org)

Climate Change Is Now Measurably Slowing Earth’s Spin: For a wider science pick beyond genetics, Scientific American highlighted a geophysics result with real systems implications: rising sea levels are redistributing mass on Earth in ways that are slowing the planet’s rotation and lengthening the day by about 1.33 milliseconds per century. The new study argues that this rate is unprecedented for at least the past 3.6 million years and may become more influential than the moon in shaping day length by century’s end. The mechanism is intuitive but powerful: meltwater moves mass away from the poles toward lower latitudes, like a spinning skater extending their arms. The change is tiny for daily life, but not trivial for precision applications such as navigation and timekeeping. It is one more example of climate change reaching into Earth systems that most people never imagine as vulnerable. (Scientific American)

IMAGE CREDIT: cottonbro studio