title: Impacts of anti-EGFR monoclonal antibody in prostate cancer PC3 cells.
abstract: Epidermal growth factor receptor (EGFR) network appears to be a rich target for prostate cancer. Thus, in this current investigation, to pursue our newly developed anti-EGFR monoclonal antibody (mAb) in prostate cancer, its inhibitory effect was investigated in PC3 cells. The binding specificity of antibody was examined by flow cytometry and immunofluorescence staining. The cultivated cells were treated with various doses of the anti-EGFR mAb at different time points and the cellular and/or molecular impacts were assessed. MTT assay was utilized to examine the cytotoxic effects. Semi-quantitative RT-PCR was used to evaluate the expression of EGFR and some important apoptosis signaling molecules (e.g., MAPK-1, STAT-5, Akt-1 kinase). Flow cytometric and immunofluorescence staining analyses showed that the anti-EGFR mAb can bind to EGFR with high specificity. The results revealed that the anti-EGFR mAb can inhibit cell growth in a dose and time dependent manner. RT-PCR analysis revealed that the binding of anti-EGFR mAb to its receptors can eventually result in downregulation of Akt-1 kinase gene, but not MAPK-1, STAT-5 and EGFR genes. Based on our findings, it can be concluded that Akt-1 is the most important downstream signaling molecules affected by anti-EGFR mAbs.
authors.affiliation: Research Center for Pharmaceutical Nanotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.
authors.forename: Alireza
authors.initials: A
authors.lastname: Rezaiemanesh
authors.forename: Jafar
authors.initials: J
authors.lastname: Majidi
authors.forename: Behzad
authors.initials: B
authors.lastname: Baradaran
authors.forename: Aliakbar
authors.initials: A
authors.lastname: Movasaghpour
authors.forename: Ailar
authors.initials: A
authors.lastname: Nakhlband
authors.forename: Jaleh
authors.initials: J
authors.lastname: Barar
authors.forename: Yadollah
authors.initials: Y
authors.lastname: Omidi
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology* / Q000378:metabolism; D000918:Antibody Specificity; D016466:CHO Cells; D045744:Cell Line, Tumor; D006224:Cricetinae; D003412:Cricetulus; D066246:ErbB Receptors / Q000037:antagonists & inhibitors* / Q000276:immunology / Q000378:metabolism; D005434:Flow Cytometry; D006801:Humans; D008297:Male; D008856:Microscopy, Fluorescence; D011471:Prostatic Neoplasms / Q000188:drug therapy / Q000378:metabolism*; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D000911:Antibodies, Monoclonal; D066246:ErbB Receptors