Stanford scientists discover 'ruptoblasts,' explosive immune cells that vanish after killing invaders
Researchers at Stanford and Ben-Gurion University have identified a previously unknown type of immune cell in planarian flatworms that they've named 'ruptoblasts' for the way they detonate within minutes of detecting a threat, killing dozens of nearby bacteria or foreign cells before dissolving completely. Published in Cell, the study found the cells are specialized gland cells, distinct from blood-derived immune cells, that undergo an explosive form of cell death called 'ruptosis' when triggered by the hormone activin; the resulting blast wave shatters the membranes of invading microbes within moments. Because the response is so fast, localized and complete, the researchers say it could offer a new blueprint for engineering targeted therapies against infections and cancer that clear invaders without lingering inflammation.
Read more →Stanford scientists discover 'ruptoblasts,' explosive immune cells that vanish after killing invaders
Researchers at Stanford and Ben-Gurion University have identified a previously unknown type of immune cell in planarian flatworms that they've named 'ruptoblasts' for the way they detonate within minutes of detecting a threat, killing dozens of nearby bacteria or foreign cells before dissolving completely. Published in Cell, the study found the cells are specialized gland cells, distinct from blood-derived immune cells, that undergo an explosive form of cell death called 'ruptosis' when triggered by the hormone activin; the resulting blast wave shatters the membranes of invading microbes within moments. Because the response is so fast, localized and complete, the researchers say it could offer a new blueprint for engineering targeted therapies against infections and cancer that clear invaders without lingering inflammation.
Bioengineered chewing gum cuts HPV levels by up to 93% in lab tests, offering a low-cost cancer defense
A chewing gum engineered with the FRIL protein and protegrin-1 peptide reduced human papillomavirus levels by roughly 93% in saliva and 80% in oral rinse samples, while cutting concentrations of two bacteria strongly linked to head and neck cancer, Porphyromonas gingivalis and Fusobacterium nucleatum, by more than 99%, according to lab testing on patient samples published in Scientific Reports. Crucially, the formulation left beneficial mouth bacteria largely intact, addressing a common shortfall of broad-spectrum antimicrobial treatments. HPV and the two bacteria are all established drivers of head and neck squamous cell carcinoma, a cancer whose incidence has been rising globally, and researchers say a cheap, easy-to-distribute gum could become a meaningful prevention tool if the results hold up in the human clinical trials planned as the next step.
Read more →Bioengineered chewing gum cuts HPV levels by up to 93% in lab tests, offering a low-cost cancer defense
A chewing gum engineered with the FRIL protein and protegrin-1 peptide reduced human papillomavirus levels by roughly 93% in saliva and 80% in oral rinse samples, while cutting concentrations of two bacteria strongly linked to head and neck cancer, Porphyromonas gingivalis and Fusobacterium nucleatum, by more than 99%, according to lab testing on patient samples published in Scientific Reports. Crucially, the formulation left beneficial mouth bacteria largely intact, addressing a common shortfall of broad-spectrum antimicrobial treatments. HPV and the two bacteria are all established drivers of head and neck squamous cell carcinoma, a cancer whose incidence has been rising globally, and researchers say a cheap, easy-to-distribute gum could become a meaningful prevention tool if the results hold up in the human clinical trials planned as the next step.
Amazon deforestation on pace for its lowest level since record-keeping began, Brazil says
Brazil's National Institute for Space Research recorded roughly 1,295 square kilometers of Amazon forest clearing between January and June 2026, a 38% drop from the same period last year and the lowest total for any comparable stretch in a decade. Environment Minister Marina Silva credited strengthened enforcement and closer cooperation with municipalities, and said Brazil could post its lowest annual Amazon deforestation rate since satellite record-keeping began in 1988 if the trend holds through the year. Researchers caution that satellite-based figures can swing seasonally and that longer-term progress will still depend on resisting economic pressure for land clearing and managing climate-driven risks like drought and fire, but the first-half numbers mark a sharp reversal from the deforestation surges of recent years.
Read more →Amazon deforestation on pace for its lowest level since record-keeping began, Brazil says
Brazil's National Institute for Space Research recorded roughly 1,295 square kilometers of Amazon forest clearing between January and June 2026, a 38% drop from the same period last year and the lowest total for any comparable stretch in a decade. Environment Minister Marina Silva credited strengthened enforcement and closer cooperation with municipalities, and said Brazil could post its lowest annual Amazon deforestation rate since satellite record-keeping began in 1988 if the trend holds through the year. Researchers caution that satellite-based figures can swing seasonally and that longer-term progress will still depend on resisting economic pressure for land clearing and managing climate-driven risks like drought and fire, but the first-half numbers mark a sharp reversal from the deforestation surges of recent years.
Stanford finds blocking a single immune receptor reverses signs of aging across multiple organs in mice
Stanford Medicine researchers reported in Science that disabling a single receptor, EP2, on tissue-resident macrophages prevented and even reversed markers of aging across the brain, heart, liver, kidney, spleen, bone marrow and colon in older mice. The receptor normally binds a hormone called prostaglandin E2, which as animals age increasingly blocks macrophages from clearing out dying neutrophils; those uncleared cells turn inflammatory and damage surrounding tissue over time. Mice with the receptor disabled on their macrophages showed less frailty, less excess fat accumulation and better heart function, and older mice also regained memory performance in maze and object-recognition tests close to that of younger animals. No approved drug yet selectively blocks EP2, but the finding gives researchers a specific, targetable mechanism behind chronic inflammation-driven aging rather than a vaguer 'inflammaging' process.
Read more →Stanford finds blocking a single immune receptor reverses signs of aging across multiple organs in mice
Stanford Medicine researchers reported in Science that disabling a single receptor, EP2, on tissue-resident macrophages prevented and even reversed markers of aging across the brain, heart, liver, kidney, spleen, bone marrow and colon in older mice. The receptor normally binds a hormone called prostaglandin E2, which as animals age increasingly blocks macrophages from clearing out dying neutrophils; those uncleared cells turn inflammatory and damage surrounding tissue over time. Mice with the receptor disabled on their macrophages showed less frailty, less excess fat accumulation and better heart function, and older mice also regained memory performance in maze and object-recognition tests close to that of younger animals. No approved drug yet selectively blocks EP2, but the finding gives researchers a specific, targetable mechanism behind chronic inflammation-driven aging rather than a vaguer 'inflammaging' process.