Is atezolizumab (Tecentriq) a chemotherapy or immunotherapy drug?
One way that cancer cells hide from the immune system is to take control of regulatory pathways like the "checkpoint" inhibitor pathway. Tecentriq can help to block this process to fight off cancer.
Atezolizumab works by targeting and blocking a protein called PD-L1 on the surface of certain immune cells called T-cells. Blocking PD-L1 triggers the T-cells to find and kill the cancer cells.
Tecentriq, from Genentech, was first approved in May 2016 and is used to treat:
- advanced bladder cancer
- advanced melanoma (skin cancer)
- metastatic non-small cell lung cancer (NSCLC)
- metastatic triple negative breast cancer (ER-/PR-, HER2-)
- extensive stage small cell lung cancer (SCLC)
- liver cancer
What is the difference between chemotherapy and immunotherapy?
Our own body has ways to fight off foreign substances and cancers through our immune system. However, cancer can learn how to hide from our immune system and can bypass inactivation that own body usually provides. When this happens, cancer can grow.
Chemotherapy (“chemo”) kills rapidly dividing cancer cells and acts on cancer cells directly. Chemotherapy can be used with other treatments, such as surgery, radiation or immunotherapy, for an overall treatment regimen.
Immunotherapy helps to boost your natural immune system to fight off diseases such as cancer. Immunotherapy works by:
- Stimulating your immune system so it works better to find and attack cancer cells.
- Improving your immune system’s ability to fight off cancer by giving you substances made in lab that are like your natural immune system cells
- However, immunotherapy can also target normal cell organs cells in your body which may lead to serious side effects, but in general, immunotherapy may be better tolerated than many of the older standard cancer treatments.
Immunotherapy can be given alone or in combination with other types of cancer treatments. It is given by an intravenous (IV) injection into your vein.
Immunotherapy is now an established way of administering cancer treatments and has shown success in many different types of malignancies.
Are there other approved checkpoint inhibitors?
Yes, there are several immune checkpoint inhibitors approved by the FDA. These agents are approved to treat many different types of cancers. The available checkpoint inhibitors include:
- Bavencio (avelumab)
- Imfinzi (durvalumab)
- Keytruda (pembrolizumab)
- Libtayo (cemiplimab-rwlc)
- Opdivo (nivolumab)
- Tecentriq (atezolizumab)
- Yervoy (ipilimumab)
How does atezolizumab (Tecentriq) work?
How atezolizumab (Tecentriq) works is somewhat different than with PD-1 checkpoint inhibitors.
- PD-L1 is a ligand on the tumor for the checkpoint PD-1 on the T-cell. Ligands interact with receptors.
- The interaction between PD-L1 ligand on the tumor and PD-1 receptor on the T-cell leads to T-cell inactivation and blocks the natural anti-tumor immune response. Due to this interaction, the tumor is not effectively attacked or killed.
- However, Tecentriq binds to the PD-L1 (ligand) site on the tumor and blocks the PD-1 interaction on the T cell, which allows the anti-tumor immune response to be triggered.
Tecentriq was the first FDA-approved PD-L1 inhibitor.
What serious side effects can occur with atezolizumab?
Atezolizumab (Tecentriq) can cause your immune system to attack normal organs and tissues in any area of your body and can affect the way they work. These problems can sometimes become serious or life-threatening and can lead to death. These problems, called immune-mediated side effects, might happen anytime during or after your treatment.
Examples of immune-mediated side effects with Tecentriq, which can be fatal, include:
- pneumonitis (lung inflammation)
- hepatitis (inflammatory condition of the liver)
- colitis (inflammation of the inner lining of the colon), diarrhea
- endocrinopathies (may include thyroid disorders, adrenal insufficiency, and type 1 diabetes)
Tecentriq may also increase the risk for infections, which may be serious.
In addition to immune-mediated side effects, the most common side effects reported in clinical trials included:
- decreased appetite
- urinary tract infections
See a full listing of atezolizumab (Tecentriq) side effects here.
- Atezolizumab (brand name: Tecentriq) is a type of immunotherapy drug called an “immune checkpoint inhibitor”. It helps to stimulate the body’s immune system to fight cancer.
- Atezolizumab works by targeting and blocking a protein called PD-L1 on the surface of certain immune cells called T-cells. Blocking PD-L1 triggers the T-cells to find and kill the cancer cells.
- Tecentriq is FDA-approved to treat several cancers, including skin cancer, liver cancer, bladder cancer, triple negative breast cancer and lung cancer.
This is not all the information you need to know about atezolizumab (Tecentriq) for safe and effective use. Review the full Tecentriq information here, and discuss this information with your doctor or other health care provider.
- Tecentriq (atezolizumab) [product information]. Genentech Inc. South San Francisco, CA. Accessed Sept. 22, 2020 at https://www.gene.com/download/pdf/tecentriq_prescribing.pdf
- Immunotherapy vs. Chemotherapy: What’s the Difference. Cancer Research Institute. Accessed Sept. 22, 2020 at https://www.cancerresearch.org/blog/june-2016/difference-cancer-immunotherapy-and-chemotherapy
- How Immunotherapy Is Used to Treat Cancer. American Cancer Society. Accessed Sept. 22, 2020 at https://www.cancer.org/treatment/treatments-and-side-effects/treatment-types/immunotherapy/what-is-immunotherapy.html
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