Journal: International Journal of Oncology
Article Title: FABP5 can substitute for androgen receptor in malignant progression of prostate cancer cells
doi: 10.3892/ijo.2023.5606
Figure Lengend Snippet: Western blot analysis of some key proteins associated with the FABP5 pathway in benign and malignant prostate cells, and western blot analysis was combined with DNA-sequencing analysis to verify the successful gene KO cell clones. An anti-β-actin antibody was incubated with each blot to standardize the immunological responses. Quantitative analysis was performed by densitometrical scanning of the area and peak of each band on the blot. The protein relative levels were reproduced independently three times, and the differences were assessed by Student's t-test for results with 2 datasets, and one-way ANOVA test for results with 3 or more datasets. Dunnett's post hoc test was utilized for multiple comparisons following the ANOVA. (A) Relative expression of FABP5 pathway-associated proteins in benign and malignant prostate epithelial cells is shown. a) Western blot analysis of FABP5 in benign PNT2 cells, the moderately malignant 22RV1 cells, and the highly malignant prostate carcinoma cell lines, DU145 and PC3M. b) Relative levels of FABP5 protein in PNT2, 22RV1, DU145 and PC3M cells. The level of FABP5 in 22RV1 cells was set at '1', and the levels in DU145 and PC3M were obtained by comparing with that of 22RV1. c) Western blot detection of PPARγ in PNT2, 22RV1, DU145 and PC3M cells. d) Relative levels of PPARγ in PNT2, 22RV1, DU145, and PC3M cells. The level in PNT2 cells was set at '1', and the levels in the other cell lines were obtained by comparing with that of PNT2. e) Western blot analysis of pPPARγ in PNT2, 22RV1, DU145 and PC3M cells. f) Relative levels of pPPARγ in PNT2, 22RV1, DU145, and PC3M cells. The level in 22RV1 cells was set at '1', and levels in DU145 and PC3M were obtained by comparing with that of 22RV1. g) Western blot analysis of ARFL protein in PNT2, 22RV1, DU145 and PC3M cells. h) Relative levels of ARFL in prostate cell lines. The level of ARFL in 22RV1 cells was set at '1', and levels in the other cell lines were not detectable. i) Western blot analysis of VEGF protein in PNT2, 22RV1, DU145 and PC3M cells. j) Relative levels of VEGF; the level in PNT2 was set at '1', and levels in the other cell lines were obtained by comparing with that of PNT2. (B) Western blot and DNA sequencing analyses were performed to verify successful gene suppression in KO cell clones. a) Western blots of FABP5 protein in 22RV1 cells and its derivative FABP5 -KO clones. b) Relative levels of FABP5 in 22RV1 cells and in its derivative FABP5 -KO clones. The level of FABP5 in 22RV1 cells was set at '1', and levels in different clones were obtained by comparing with that in 22RV1. c) Further Western blots of FABP5 protein in 22RV1 cells and in the successful FABP5 -KO clone C3. d) DNA sequence analysis revealed the location where the guide RNA-induced mutation occurred (depicted by the black arrow). e) Western blot analysis of FABP5 protein in DU145 cells and in its derivative FABP5 -KO clones. f) Relative levels of FABP5 in DU145 and in the different FABP5 -KO clones. The level of FABP5 in DU145 was set at '1', and the levels in the different clones were obtained by comparing with that in DU145. g) Western blot analysis of FABP5 protein in DU145 cells and in a selected FABP5 -KO clone (C2). h) DNA sequence analysis revealed the location where the guide RNA-induced mutation occurred (depicted by the black arrow). i) Western blot detection of FABP5 expression in PC3M and in different FABP5 -KO clones. j) Relative levels of FABP5 in PC3M and in its different FABP5 -KO clones. The level of FABP5 in PC3M was set at '1', and the levels in its different FABP5 -KO clones were obtained by comparing with that in PC3M. k) Western blot analysis of FABP5 protein in PC3M and in its selected FABP5 -KO clone, C6. l) DNA sequence analysis revealed the location where the guide RNA-induced mutation occurred (depicted by the black arrow). m) Western blot analysis of AR protein in 22RV1 cells and in its different AR -KO clones. n) Relative levels of AR in 22RV1 cells and in its AR -KO clones. The level of AR in 22RV1 was set at '1', and the levels of AR in different clones were obtained by comparing with that in 22RV1. o) Western blot analysis of AR expression in 22RV1 cells and in its AR -KO clones. p) Relative levels of AR in 22RV1 and in its AR -KO clones. The level of AR in 22RV1 was set at '1', and the levels of AR in different clones were obtained by comparing with that in 22RV1 cells. *** P<0.0001 and **** P<0.00001. KO, knockout; FABP5, fatty acid-binding protein 5; AR, androgen receptor; PPARγ, peroxisome proliferator-activated receptor-γ; VEGF, vascular endothelium growth factor; pPPARγ, phosphorylated PPARγ; ns, not statistically significant.
Article Snippet: FABP5 , Monoclonal Rabbit Anti-human FABP5 (1:500; Hycult; cat. no. HP-9030) , Swine polyclonal anti-rabbit Immunoglobulin/HRP (Dako; Agilent Technologies, Inc.; 1:20,000; cat no: P039901-2).
Techniques: Western Blot, DNA Sequencing, Clone Assay, Incubation, Expressing, Sequencing, Mutagenesis, Knock-Out, Binding Assay