Immune System
Study links GDF3 signaling in aging macrophages to heightened inflammation and worse outcomes in infection models
Rapporteret af AI Billede genereret af AI Faktatjekket
University of Minnesota researchers report that older mice’s macrophages can become locked in an inflammatory state through an autocrine signaling loop involving the protein GDF3 and the transcription factors SMAD2/3. In experiments, genetic deletion of Gdf3 or drugs that interfered with the pathway reduced inflammatory responses and improved survival in older endotoxemia models, while human cohort data linked higher GDF3 levels with markers of inflammation.
Researchers led by Helmholtz Munich report that some gut-dwelling bacteria — including strains not typically considered harmful — possess syringe-like molecular machinery that can deliver bacterial proteins into human cells, affecting immune and metabolic signaling. The work also links these bacterial “effector” genes to Crohn’s disease–associated microbiome patterns, though the authors say more studies are needed to determine how the mechanism influences disease.
Rapporteret af AI
A recent clinical study shows that HDI Propoelix propolis extract can support the immune system in patients with metabolic disorders such as diabetes, obesity, and hypertension. The 30-day study was conducted at RS Soerojo Magelang and presented at a seminar in Jakarta on March 7, 2026. Experts emphasize that the supplement serves only as a complement, not a replacement for medical therapy.
A new study in mice reveals that tattoo ink can lead to chronic inflammation in lymph nodes, potentially altering immune responses for life. Human samples show similar effects years after tattooing. Researchers urge more investigation into health risks.
Rapporteret af AI Faktatjekket
A multi-year study has found that rheumatoid arthritis appears to begin years before joint pain or stiffness, with sweeping immune changes unfolding silently in people who carry RA‑linked antibodies. By tracking these at‑risk individuals over seven years, researchers documented systemic inflammation, immune cell dysfunction and epigenetic reprogramming, findings that could support earlier detection and prevention efforts.