Environmental pressures are known as a driving force behind many of the major animal developmental transitions, such as the switch from tadpoles in the pond to a frog's life on land with legs. Yet the mechanisms behind this physical and environmental relationship remain somewhat of a mystery. Published in Science Advances, a new multi-year study sheds light on the mechanistic link between environmental variation and developmental adaptability. Using a common reef fish as a model, the researchers explored how environmental differences impacted thyroid hormone signaling, a process essential for development regulation.

Summary

Familial Mediterranean fever (FMF) is a genetic autoinflammatory disorder that causes recurrent fevers and painful inflammation of the abdomen, chest, and joints. The disease is caused by mutations in MEFV, the gene that encodes a protein called pyrin. Yet for nearly three decades, the key step that allows pyrin to activate the inflammatory switch has remained a mystery.

Two new companion studies published in Science Immunology by researchers at Kyoto University and their collaborators now shed light on this long-standing question. Approaching the question from opposite directions—one starting from a small group of patients with severe unexplained inflammation, the other from a systematic functional analysis of 265 mutations in MEFV drawn from genomic databases—the studies converge on the same molecular mechanism. They reveal that a lock-and-key interaction between pyrin and a small cellular regulator called CDC42 acts as the switch that ignites inflammation.

These findings clarify the missing step in pyrin activation and open the way to more accurate diagnosis and personalized treatment for patients living with diseases driven by dysregulated pyrin activity.

The two studies will be published in Science Immunology at 14:00 ET on August 7, 2026 (03:00 JST on August 8, 2026).

Understanding how heart muscle cells stop dividing and acquire the characteristics needed to sustain lifelong cardiac function remains one of the greatest challenges in cardiovascular biology. Leveraging human induced pluripotent stem (iPS) cell technology, a team led by Associate Professor Yoshinori Yoshida (Department of Clinical Application, CiRA, Kyoto University) and Associate Professor Antonio Lucena-Cacace  (WPI-PRIMe, The University of Osaka) has identified PRDM16 as an important regulator governing the balance between proliferation and maturation in human iPSC-derived cardiomyocytes.

Diallyl disulfide is an organosulfur compound derived from garlic, and R-carvone is a monoterpenoid derived from spearmint. Researchers processed these compounds into oil-in-water nanoemulsions and applied it to the adzuki bean beetle—a known legume pest. The researchers found that the nanoemulsions were highly toxic against the pest, suggesting that they could be a promising environmentally friendly alternative to synthetic pest-control agents.

Kanazawa University, Japan – Research group led by Prof. Keiichi Hirano and Assistant Prof. Akira Matsumoto have developed a novel synthetic method for the selective cleavage of strong carbon–hydrogen (C–H) bonds while preserving weaker carbon–silicon (C–Si) bonds. This transformation enables the upgrading of structurally simple α-silyl alcohols into functionalized derivatives that are difficult to access by conventional methods. The key to this success lies in utilizing a finely tuned phosphonium ylide catalyst in combination with an organophotoredox catalyst under visible-light irradiation.

Growth impairment is a common late effect of childhood stem cell transplantation. A Japan-wide study found that growth hormone therapy improves adult height, but prior radiation therapy and transplant-related complications negatively affect how much children benefit.

Medication-related osteonecrosis of the jaw (MRONJ) can be difficult to treat once it develops, making prevention especially important. In a retrospective study, a Hiroshima University researcher found that quantitative measurements extracted from CT images taken before treatment, when analyzed with machine learning, could distinguish patients who later developed the condition from those who did not—an early step toward predicting MRONJ risk before bone resorption inhibitor therapy begins.

Ultrathin magnetic films for next-generation memory devices face a trade-off between atomic ordering and surface flatness. Researchers from the University of Toyama addressed this using a two-step heating method to grow highly ordered 5-nm-thick FePd films. The process involves low-temperature deposition for smooth layer-by-layer growth, followed by an annealing step to promote atomic ordering. The findings provide a simple strategy for developing energy-efficient magnetic random-access memory and high-density magnetic storage technologies.

Certain systems exhibit collective dynamics driven by nonreciprocal interactions, where particles do not exert equal influences on one another. Researchers from Tokyo University of Science demonstrated such behavior in a colloidal system containing more than 10,000 particles. Instead of growing into large static aggregates, the particles formed self-propelled pairs that sustained a dynamic, fragmented state. The experiment provides a platform for studying nonreciprocal interactions and their role in shaping collective dynamics in large-scale systems.

A newly identified role for C/EBPγ reveals how lung adenocarcinoma cells simultaneously acquire invasive properties and strengthen DNA repair. The findings uncover a potential driver of treatment resistance and a promising therapeutic target.