KC expression in adipose fractions and during in vitro adipogenesis. A, KC mRNA levels in adipocyte and SV fractions of epididymal white adipose tissue of lean and obese mice. ns, not significant; **, p < 0.005. n = 6, mean ± S.D. B, changes in KC mRNA levels during adipogenesis. At day 0, confluent 3T3-L1 preadipocytes were induced to differentiate, and by day 11 the majority of cells had converted into mature adipocytes. C, changes in KC protein expression in conditioned media from the same cells as shown in B. *, p < 0.05 versus day 0. n = 3, mean ± S.D.