Journal: JNCI Journal of the National Cancer Institute
Article Title: Immunotherapeutic Potential of Anti-Human Endogenous Retrovirus-K Envelope Protein Antibodies in Targeting Breast Tumors
doi: 10.1093/jnci/djr540
Figure Lengend Snippet: Effect of 6H5 monoclonal antibody (mAb) on apoptosis of breast cancer cells. A) Cells were treated with 6H5 mAb (red line) or control mIgG (gray line) (10 μg/mL of each antibody) for 16 hours, stained with annexin V–allophycocyanin and 7-AAD-phycoerythrin-cyanide 7, and analyzed by flow cytometry. B) Effect of 6H5 mAb treatment on cell death–inducing DFFA-like effector A (CIDEA) protein expression. Breast cancer cell lines were treated with 6H5 mAb or mIgG (10 μg/mL of each antibody) for 24 hours and analyzed for changes in protein expression by immunoblot using a mouse anti-human CIDEA antibody. ACTB was used as the protein loading control. Results are representative of two independent assays. C) The effect of 6H5 mAb treatment on expression of TP53 and TP53AIP1 proteins. MCF-7 and MDA-MB-231 breast cancer cell lines were treated with 6H5 mAb or mIgG (10 μg/mL of each antibody) for 24 hours, and an immunoblot assay was done using mouse anti-human TP53 and rabbit anti-human TP53AIP1 antibodies. ACTB was used as the protein loading control. Results are representative of two independent assays. D) Expression of active caspases 3 and 9 was assessed by immunoblot assay in ZR-75-1 and MDA-MB-231 breast cancer cells treated with 6H5 mAb or 6E11 mAb, or with mIgG (10 μg/mL of each antibody) for 24 hours using rabbit anti-human caspase 3 and mouse anti-human caspase 9 antibodies. ACTB was used as the protein loading control (top panel). Expression of active caspase 8 was assessed by immunoblot assay in MDA-MB-453 and MCF-7 breast cancer cells treated with 6H5 mAb (10 , 25, or 50 μg/mL), or with mIgG (10 μg/mL) for 24 hours using mouse anti-human caspase 8 antibody (bottom panel). Results are representative of at least two independent assays. E) Immunofluorescence assay to assess the expression of caspase proteins in MDA-MB-231 cells treated with 6H5 mAb or mIgG (10 μg/mL of each antibody) for 24 hours using rabbit anti-human caspase 3, mouse anti-human caspase 8, and mouse anti-human caspase 9 antibodies. Results are representative of two independent assays. Scale bar = 10 μm. F) Immunofluorescence assay to assess the expression of CDK5 and CDKN1A proteins. MDA-MB-231 cells were treated with 6H5 mAb or mIgG (10 μg/mL of each antibody) using mouse anti-human CDK5 and mouse anti-human CDKN1A antibodies. Results are representative of at least two independent assays. Scale bar = 10 μm.
Article Snippet: Mouse anti-human cell death–inducing DFFA-like effector A (CIDEA) antibody (Abnova, Taipei, Taiwan; 1:1000 dilution) was used for detection of CIDEA expression in cells treated with 6H5 mAb or mIgG.
Techniques: Control, Staining, Flow Cytometry, Expressing, Western Blot, Immunofluorescence