Figure 8. Ferroportin protein levels are increased by GLRX5 depletion only in erythroid precursor cells.
(A) Western blots of FPN1 in GLRX5 siRNA–treated K562 and HeLa S3 cells, in which GLRX5 was knocked down by 4 siRNA oligos (1 to 4). WT, mock, and neg are negative controls. FPN1, ferroportin. α-Tubulin is loading control. (B) qRT-PCR analysis of GLRX5, FPN1a, FPN1b, and total FPN1 transcripts in GLRX5 siRNA–treated K562 cells. Results were verified by the transcript level of actin, and represent the average of 3 repeats. P = 0.0063, 0.011, 0.015, and 0.007 for GLRX5 in oligo 1–4; P = 0.0076, 0.04, 0.025, and 0.017 for FPN1a in oligo 1–4; P = 0.013, 0.034, 0.12, and 0.004 for FPN1b in oligo 1–4; and P = 0.138, 0.0087, 0.021, and 0.0053 for FPN1 total in oligo 1–4. *P < 0.05; **P < 0.01.