Is HER2 a tumor specific antigen?
Is HER2 a tumor specific antigen?
The human epidermal growth factor receptor 2 (HER2) represents one of the most studied tumor-associated antigens for cancer immunotherapy. The receptors for HER2 are overexpressed in various human cancers, such as breast and ovarian cancer.
Is HER2 a tumor marker?
A HER2/neu test may be done to help plan treatment, which may include drugs that target the HER2/neu protein. It is a type of tumor marker test. Also called HER2 test and human epidermal growth factor receptor 2 test.
What does a positive HER2 test mean?
HER2-positive breast cancer is a breast cancer that tests positive for a protein called human epidermal growth factor receptor 2 (HER2). This protein promotes the growth of cancer cells. In about 1 of every 5 breast cancers, the cancer cells have extra copies of the gene that makes the HER2 protein.
What is HER2 antigen?
HER2 is a member of the human epidermal growth factor receptor (HER/EGFR/ERBB) family. Amplification or over-expression of this oncogene has been shown to play an important role in the development and progression of certain aggressive types of breast cancer.
What are some immunotherapy drugs?
What are some of the drugs used in immunotherapy?
- Ipilimumab (Yervoy®)
- Pembrolizumab (Keytruda®)
- Nivolumab (Opdivo®)
- Atezolizumab (Tecentriq®)
What are HER2 antibodies?
Anti-HER2 isotype family Trastuzumab is a humanized IgG1 monoclonal antibody that targets the HER2 receptor (also known as HER2/neu) that is found on the cell membrane of epithelial cells. HER2 plays an important role in normal cell growth and differentiation.
What does HER2 stand for in breast cancer?
Some women have breast tumors with higher levels of a protein known as HER2/neu – these are called HER2-positive breast cancers. HER2/neu (often just shortened to HER2) is a growth-promoting protein on the outside of all breast cells. Breast cancer cells with higher than normal levels of HER2 are called HER2-positive.
Are there any other cancers that have HER2 overexpression?
HER2 overexpression has also been seen in other cancers like ovary, endometrium, bladder, lung, colon, and head and neck.
Can a HER2 positive cancer be treated with trastuzumab?
Gastric cancers with HER2 IHC overexpression of 3+ or FISH positive are considered positive and thus be treated with trastuzumab. Thus, HER2 3+ or FISH +/HER2 IHC 1+, FISH +/HER2 IHC 2+, FISH +/HER2 IHC 3+ gastric cancer patients should be treated with trastuzumab. Table 1
How is HER2 gene amplification related to overall survival?
HER2 gene amplification is associated with shorter disease-free and overall survival in breast cancer. Slamon et al. established the prognostic significance of HER2 amplification in 189 human breast cancers. Amplification of HER2 gene was found to be a significant predictor of both overall survival (P< 0.001) and time to relapse (P< 0.0001).
