A mouth bacterium linked to slower aging — AI found it by scanning thousands of human profiles

Key Findings

🏃 10-minute HIIT three times a week improved memory in old mice

• 24-month-old female mice doing short high-intensity interval sessions for 8 weeks showed better T-maze alternation and novel object recognition compared to sedentary controls.
• Across liver, muscle, and brain tissue, HIIT increased markers of mitochondrial function and autophagy, and reduced a cellular senescence marker in muscle and liver — hitting four hallmarks of aging in a single short-exercise protocol.

💊 Rapamycin reshaped immune activity in aged mice with established artery plaques

• In 80-to-90-week-old mice with existing atherosclerotic lesions, 8 weeks of rapamycin reduced plaque macrophage content and shifted CD8+ T cells from an effector toward a central memory profile.
• Regulatory T cells increased, age-associated B cells declined in spleen and lymph nodes, and senescence scores in aortic immune cells dropped — suggesting the drug remodeled, rather than simply suppressed, the aged immune landscape.

🧬 A fly protein links nutrient sensing to lifespan through ribosome production

• A protein called Lsp2, previously known only as a fat-storage molecule in fruit flies, turns out to amplify a key nutrient-sensing pathway and boost production of ribosomal proteins — the cellular machinery that makes all other proteins.
• Deleting Lsp2 robustly extended fly lifespan without harming reproduction, and did so through a mechanism distinct from rapamycin, suggesting a new lever on the same longevity pathway.

🫀 Transplanting mitochondria into aging hearts restored a critical cleanup process

• In aged cardiac tissue, a signaling molecule called HIF-3α was abnormally elevated in senescent heart muscle cells, causing a traffic jam in mitophagy — the process cells use to remove damaged mitochondria.
• Transplanting healthy mitochondria into aging hearts corrected this jam by restoring cellular energy balance, reducing HIF-3α-driven overactivation, and improving heart function in the process.

🦷 Gum disease and tooth loss are linked to faster epigenetic aging

• A population-based study examined whether periodontitis and edentulism — complete tooth loss — were associated with accelerated epigenetic aging as measured by DNA methylation clocks in older adults.
• The findings add oral health to a growing list of modifiable factors associated with biological age acceleration, alongside smoking, metals exposure, and metabolic disease.

🧪 Senescent cells in aging kidneys may be a distinct, targetable driver of scarring

• A review of chronic kidney disease evidence found that senescent epithelial cells accumulate with age and actively promote kidney fibrosis and immune infiltration — not just as bystanders but through their secretory output.
• In animal studies, clearing senescent cells extended healthy lifespan, preserved function, and reduced fibrosis across multiple organs including the kidney, elevating senolytic strategies as a serious therapeutic direction.