Bub1b mutation | Bub1b mutation decreases median lifespan by 60% (from 15 to 6 months). Bub1b mutant mice develop many phenotypes suggestive of accelerated aging, including: progressive bilateral cataracts, substantial loss of sub dermal adipose tissue, spinal kyphosis, muscle atrophy, and decreased wound healing. Moreover, there is a pronounced increase in senescent associated Beta-galactosidase expression in late generation Bub1b mutant mice, indicative of increased rate of cellular senscence. Homozyogous knockout of Bub1b results in lethality, while heterozygous animals exhibit no aging phenotypes [15208629]. | Mouse | — | -60 | — |