highly significantp < 0.001
These changes become highly significant (853 ± 96 p m versus 452 ± 42 p m , p < 0.001) after 24 h and are associated with increased expression of the Zn 2+ importer family members Slc39a6 , Slc39a7 , and Slc39a8 , and decreased expression of metallothionein 1 and 2.