aging animal apoptosis cancer cellreceptors cellsurvival cellularsenescence cellularsignaltransduction complications congresses cytologicaltechniques death(biology) degeneration diseasemodels etiology genetherapy genetics immunesystem immunology lymphocytes med604f methods mitochondria mitochondrialdiseases mitochondrialdna mitochondrialpathology molecularaspects neoplasms nervedegeneration nervensystem nervoussystem neurons oxidativestress pathogenicity physiology physiopathology priondiseases prionkrankheit prions qh671 qh671a6435112001 qh671a64361995 qh671c3931981 receptors therapy tumornecrosisfactor wl300 yg4500