Fig 5. Overexpression of miR-122 reversed FSH+E2-induced LRBP downregulation and increased its association with LHCGR mRNA.
Granulosa cells were isolated from immature female rats injected subcutaneously with estradiol (1.5 mg) for three consecutive days. Cells were cultured in serum-free media for 24 hours and then pretreated with AdmiR-122 (1 x 109 pfu) or AdGFP (1 x 109 pfu) for 24 hours. Media was replaced after 24 hours and cells were treated with FSH (50 ng/ml) and E2 (1nM) for six hours. A. Total RNAs were isolated and reverse transcribed, and the resulting cDNAs were subjected to real-time PCR quantitation using specific primers and probes for LRBP (MVK). The graph represents changes in mRNA levels normalized to 18S rRNA and shown as fold-change vs. control. Error bars represent mean ±SE. *p<0.05 vs. AdGFP; **p<0.05 vs. AdGFP+FSH+E2; n=4. B. Gel mobility shift analysis was performed using S100 fractions isolated from different treatment groups containing equal amounts of total protein after incubating with [32P]-labeled LBS (1.5 x 105 c.p.m). The autoradiogram shown is representative of three independent experiments. Densitometric scanning of the bands is represented in the bar diagram. Error bars represent mean ±SE. *p<0.05 vs. AdGFP; **p<0.05 vs. AdGFP+FSH+E2; n=4.