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HER2 is so named because it has a similar structure to human epidermal growth factor receptor, or HER1. Neu is so named because it was derived from a rodent glioblastoma cell line, a type of neural tumor. ErbB-2 was named for its similarity to ErbB (avian erythroblastosis oncogene B), the oncogene later found to code for EGFR.
Scientists study the behaviour of isolated cells grown in the laboratory for insights into how cells function in the body in health and disease. Experiments using cell culture are used for developing new diagnostic tests and new treatments for diseases. This is a list of major breast cancer cell lines that are primarily used in breast cancer ...
SkBr3 cells have been used in studies seeking to overcome Herceptin treatment resistance to HER2-overexpressing breast cancers. [4] The cell line has also been examined for applications in CRISPR/Cas9 gene editing, [5] antibody resistance in transfections, and HER2-based cancer therapies in context of microenvironment fluctuations.
The HER2 gene (also known as HER2/neu and ErbB2 gene) is amplified in 20–30% of early-stage breast cancers. [43] Trastuzumab is a monoclonal antibody targeting HER2, inducing an immune-mediated response that causes internalization and recycling of HER2. It may also upregulate cell cycle inhibitors such as p21 Waf1 and p27 Kip1. [57]
The first breast cancer cell line described, BT-20, was established in 1958. Since then, and despite sustained work in this area, the number of permanent lines obtained has been strikingly low (about 100). Indeed, attempts to culture breast cancer cell lines from primary tumors have been largely unsuccessful.
Trastuzumab targets tumor cells and causes apoptosis through the immune system by promoting antibody-dependent cellular cytotoxicity. [28] Two thirds of women respond to trastuzumab. [32] Although herceptin works well in most breast cancer cases, it has not been yet elucidated as to why some HER2-positive breast cancers don't respond well.
The cell line is a great model for breast cancer cells because the cells proliferate at a fast rate and is stimulated by androgens, but inhibited by progesterone, estrogen, and Her-2 receptors. The specific mutation that contributes to the cell cancer line is a glutamate to histidine change found on exon 7; more specifically, the amino acid 865.
Pertuzumab is administered as an intravenous infusion in combination with trastuzumab and docetaxel as a first line treatment for HER2-positive metastatic breast cancer. [4] [3] It is also used in the same combination as a neoadjuvant (given to reduce the size of a tumor, prior to surgery or radiation) for HER2-positive early breast cancer; as of 2016 this use had not been shown to increase ...
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