Fig. 1.
20E responsiveness in the fat body of previtellogenic female mosquitoes. (A) Hormonal titers during the first vitellogenic cycle of the anautogenous mosquito, A. aegypti. BM, blood meal; E, eclosion; JH III titers [modified from Shapiro et al. (18)]; 20E titers [modified from Hagedorn et al. (6)]. (B) Fat bodies from mosquitoes were isolated at 12-h intervals after eclosion and cultured in vitro for 6 h in medium with or without the presence of 1 × 10-6 M 20E. The expression of the genes involved in the 20E signal pathway was determined by real-time PCR and was normalized to β-actin expression. Representative data (mean ± SEM) from at least three independent experiments are shown. CM, culture medium.