A team from IRB Barcelona, in collaboration with the Sant Joan de Déu Research Institute and the Pediatric Cancer Center Barcelona at Sant Joan de Déu Hospital, has described a mechanism by which a cancer-related protein can activate regions of DNA that normally remain silenced.

Using the Drosophila fruit fly, the researchers demonstrated that this activation depends on collaboration with another protein, enabling the study of a mechanism that is difficult to isolate in human cells.

The study, published in G3: Genes|Genomes|Genetics, may help explain previous observations in prostate cancer and B-cell acute lymphoblastic leukemia.

The stability of the human gut microbiome relies on interactions between different bacterial species. However, the specific molecular mechanisms of these interactions, particularly among non-dominant species, remain largely unexplored. In a new study, a research team from Hosei University, Japan, has discovered such an interaction, in which Escherichia coli detects metabolites from Bifidobacterium through a special sensory mechanism, forming a non-dominant communication network. This finding helps explain how gut microbiome diversity is maintained.

Open-access 3D model of the world’s largest woodpecker brings an extinct Mexican bird into the public eye.

Natural UV-absorbing saclipins from the edible cyanobacterium Aphanothece sacrum have promising potential for cosmetic and functional materials, but their low abundance limits their use. Researchers have now identified AsLOX2 as a key gateway enzyme that oxygenates α-linolenic acid to form a saclipin-related intermediate. By combining this enzymatic step with chemical conversion, they produced saclipins A and B, providing a foundation for alternative production methods and a deeper understanding of this unusual natural product pathway.

This review argues that the central obstacle to the clinical translation of RNA 5-methylcytosine (m5C) in cancer is measurement, not biological plausibility. Although m5C regulates RNA maturation, export, stability, translation and decay, and altered m5C pathways have been linked to tumor progression, immune regulation and resistance phenotypes, current platforms support non-equivalent claims. LC-MS/MS provides calibrated bulk quantification but destroys site information; conversion and deaminase chemistries resolve candidate nucleotides but remain background-limited and largely semiquantitative; antibody enrichment and writer trapping yield regions or enzyme-dependent substrates without native site fractions; nanopore calls are model- and context-dependent. These limitations are amplified near the noise floor in FFPE tissue, small biopsies, plasma and extracellular-vesicle RNA, where a missing signal is a no-call rather than an unmodified cytosine. The authors conclude that no platform is yet adequate as a standalone reportable assay. Translation requires an intended-use-specific measurand, matrix-matched controls, calibrated site fractions, locked wet-laboratory and bioinformatic procedures, explicit limits of blank, detection and quantification, followed by independent clinical validation and comparison with established tests. Biological heterogeneity, tumor attribution, incremental value, feasibility and clinical utility also require prospective evaluation in parallel.

In a new, paradigm-shifting study in ovaries from 28 women, scientists at Northwestern University and the Buck Institute for Research on Aging found in the decades well past menopause, the ovary remains biologically active and continues to remodel with age, showing increased inflammation and changes in tissue structure. The study also found a molecular link between ovarian aging and cancer.

“In the ovary, we reach a point of no return with respect to fertility in which it's no longer producing eggs, and I would venture to say most people assume those ovaries are just sitting there doing nothing, similar to the appendix,” said co-corresponding author Francesca Duncan, associate professor of reproductive science in medicine at Northwestern University Feinberg School of Medicine. “But that's what makes this study very different.” 

The findings challenge the notion that the ovary is an innocent bystander after reproduction ends, raising new questions about whether it could play a more active role in aging and chronic disease in women. 

The anatomical differences in our vocal tracts could be one of the sources of our Tower of Babel—the vast difference in languages spoken around the world, according to a study published October 13^th in the open access journal PLOS Biology by Steven Moran and Tiena Danner from the University of Neuchâtel, Switzerland, and colleagues.