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The function of a gene called the HER2/neu gene is to make HER2 protein. In healthy bodies this protein (from two HER2/neu genes) contributes to normal cell growth. When there is too much of this protein it can lead to uncontrolled cell growth (cancer). This is known as over expression for a protein. Trastuzumab is only used in patients who have over expression of the HER2 protein. |
Herceptin binds to the HER2 protein like a lock and key model. It is a monoclonal antibody and it fits the shape of the binding site. The aim is to then prevent growth factor molecules from binding and causing unwanted cell growth. |
This image was taken from www.roche.pt/her2/ her2eocancro/oquee.cfm. |
This image were taken from http://psaweb.pcola.med.navy.mil/breasthealth/Monoclonal.html . |
This image were taken from http://psaweb.pcola.med.navy.mil/breasthealth/Monoclonal.html . |
The HER2 protein is a part of the epidermal growth factor receptor family. This group have integral kinase activity. There is evidence for trastuzumab inducing cell cycle inhibitors and host immune responses. |
This picture (taken from: http://www.healthofchildren.com/C/Chemotherapy.html) is showing the Herceptin monoclonal antibodies, along with chemotherapy, inhibiting cancerous cell growth. |