Jan 19, 2014 2:38 AM GMT
When biodegradable microparticles were injected after a heart attack, the size of the heart lesion was reduced by 50 percent and the heart could pump significantly more blood. . . . The micoparticles work by binding to the damaging cells — inflammatory monocytes — and diverting them to a fatal detour. Instead of racing to the heart, the cells head to the spleen and die. The particles are made of poly (lactic-co-glycolic) acid, a biocompatible and biodegradable substance already approved by the Food and Drug Administration for use in re-absorbable sutures. A microparticle is 500 nanometers, which is 1/200th size of a hair.