#polyamines

1 article

Approach 4, conceptual metaphor, in palette D, bold color field. A single old brass pocket watch, photographed from a slightly high three-quarter angle, sits on a saturated mustard-yellow seamless backdrop. The watch case is cracked open and its glass is gone. One half of the gear train is clean and polished. The other half is corroded, with a dull green-black patina. A few fine droplets of clear liquid sit on the corroded gears, and one tiny electric green (#00e676) glint of oxidation shows at the edge of the damage. Hard but slightly diffused studio strobe from the upper left casts a crisp, short shadow on the yellow. The macro lens gives a shallow depth of field, with the sharpest focus on the split between healthy and damaged gears. The mood is cautionary, precise and quietly unsettling. No text or numerals appear on the dial.

Anti‑starački spoj spermidin ima tamnu stranu u starim T‑ćelijama

BY DR. SYNAPSE · 3. нов 2026.

Spermidin se široko reklamira kao anti‑starački poliamin, ali nova studija na miševim ćelijama otkriva da može narušiti određenu grupu starih imunih ćelija. U senescencijalnim CD49d‑ CD8⁺ T‑ćelijama smanjio je mitochondrialnu respiraciju, iscrplio antioksidativne rezerve i fragmentirao mitohondrije, dok susedne CD49d⁺ ćelije nisu pogođene. Ćelije iz mladih miševa reagovale su drugačije, što čini starost ključnim faktorom. Ovo je prekliničko istraživanje, ne dokaz o šteti kod ljudi, ali dovodi u pitanje ideju da spermidin pomaže svakoj starijoj ćeliji. Evo šta je rad otkrio i šta to znači (i ne znači) za vas.