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• W2764269314 abstract "Previously, we identified that β-hCG is expressed by BRCA1 mutated but not wild type breast cancers in vitro/in vivo and exhibited a novel event in β-hCG overexpressing BRCA1 mutated HCC1937 cells where the cells were able to form spheres (HCC1937 β spheres) in adherent cell culture plates even in the absence of any growth factors. These spheres express stem cell and EMT markers. In the present study, we carried out the total proteomic profiling of these HCC1937 β spheres obtained from BRCA1 defective β-hCG expressing stable breast cancer cells to analyze the cell signaling pathways that are active in these cells. Functional annotation revealed proteins (164 cellular and 97 secretory) predominantly involved in oxygen binding, nucleosome assembly, cytoskeleton organization, protein folding, etc. Many of the proteins identified from HCC1937 β spheres in this study are also up regulated in breast cancers, which are directly linked with poor prognosis in human cancer samples as analyzed using TCGA data set. Survival analysis shows that β-hCG expressing cancer patients are linked with poor survival rate. Interestingly, hemoglobins were identified at both cellular and secretory level in HCC1937 β spheres and experiments after treating with ROS inducers revealed that β-hCG induces hemoglobin and protects the cancer cells during oxidative stress. Our proteomic data strongly propose β-hCG as an oncogenic molecule associated with BRCA1 mutation, and hence, targeting β-hCG could be a strategy to treat BRCA1 defective breast cancers." @default.
• W2764269314 created "2017-10-20" @default.
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• W2764269314 date "2017-11-07" @default.
• W2764269314 modified "2023-10-18" @default.
• W2764269314 title "Proteomic Profiling of β-hCG-Induced Spheres in BRCA1 Defective Triple Negative Breast Cancer Cells" @default.
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• W2764269314 doi "https://doi.org/10.1021/acs.jproteome.7b00562" @default.
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