It is often difficult for research institutions, including universities, to rear mice for long periods and transfer them between institutions. Since environmental conditions and long-term rearing can affect the phenotype of aged mice, breeding these mice in a uniform environment is crucial. The aged mice supplied by the NBRP are bred for approximately two years in a uniform environment that is strictly controlled for microbes. Our aged mice are therefore microbially safeand can be used in aging research.
・Standard mouse strains(C57BL/6J, C57BL/6N, BALB/cA): 3 strains
・Rearing conditions (single bred, group bred): 2 conditions