(A) Mitf regulates endogenous cathepsin K
mRNA expression in human osteoclasts. Primary human osteoclasts
cultured from bone marrow were infected at day 11 with adenoviruses
encoding wild-type Mitf, GFP, and mutant Mitf followed by harvesting
total RNA after 46 and 67 h. Northern blots were probed for
cathepsin K, GAPDH, and c-fms. Comparable overexpression of wild-type
and mutant Mitf proteins was verified by Western blot
(Bottom) with anti-Mitf antibody. (B)
TRAP mRNA levels also increase upon overexpression of wild-type Mitf.
Day 14 and day 11 primary human osteoclasts were infected with
adenoviruses encoding wild-type Mitf, GFP, and mutant Mitf followed by
harvesting total RNA after 67 and 46 h, respectively.