Abstract
Neonatal Nav1.5 (nNav1.5) is a potent tumour metastatic marker found re-expressed in human breast cancer cells with aggressive phenotype and breast tumour tissue positive for lymph node metastasis. Mouse anti-nNav1.5 monoclonal antibody, 4H8 was recently obtained.Neonatal Nav1.5 (nNav1.5) is a potent tumour metastatic marker found re-expressed in human breast cancer cells with aggressive phenotype and breast tumour tissue positive for lymph node metastasis. Mouse anti-nNav1.5 monoclonal antibody, 4H8 was recently obtained. This study aimed to assess the specificity of the 4H8 against nNav1.5. 4H8 was used as primary antibody in Western blot and immunocytochemistry tested on cells and cell lysates, respectively of two human breast cancer cell line; MDA-MB-231+nNav1.5 and MCF-7-nNav1.5, a mouse mammary cancer cell line, 4T1+nNav1.5, a non-cancerous human breast epithelial, MCF-10A-nNav1.5 and tumour tissue lysate from an orthotopic syngeneic mouse model (4T1+nNav1.5/BALB/c). were consistent with nNav1.5 protein being more abundantly expressed in aggressive human breast cancer cell line, MDA-MB-231+nNav1.5 and mouse mammary cancer cell line, 4T1+nNav1.5 and tumour tissue lysate from an orthotopic syngeneic mouse model (4T1+nNav1.5/BALB/c) as compared to MCF-7-nNav1.5 and MCF-10A-nNav1.5. The new antibody described in this work can be a novel tool in studying nNav1.5 expression in breast cancer.
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