Immunotherapy is a type of cancer treatment that helps your immune system fight cancer. The immune system helps your body fight infections and other diseases. It is made up of white blood cells and organs and tissuesof the lymph system.
Immunotherapy is a type of biological therapy. Biological therapy is a type of treatment that uses substances made from living organisms to treat cancer.
Types of Immunotherapy
Many different types of immunotherapy are used to treat cancer. They include:
Other types of monoclonal antibodies can “mark” cancer cells so it is easier for the immune system to find and destroy them. These types of monoclonal antibodies may also be referred to as targeted therapy. See Targeted Therapy for more information.
Adoptive cell transfer, which is a treatment that attempts to boost the natural ability of your T cells to fight cancer. T cells are a type of white blood cell and part of the immune system. Researchers take T cells from the tumor. They then isolate the T cells that are most active against your cancer or modify the genes in them to make them better able to find and destroy your cancer cells. Researchers then grow large batches of these T cells in the lab.
You may have treatments to reduce your immune cells. After these treatments, the T cells that were grown in the lab will be given back to you via a needle in your vein. The process of growing your T cells in the lab can take 2 to 8 weeks, depending on how fast they grow.
Cytokines, which are proteins that are made by your body’s cells. They play important roles in the body’s normal immune responses and also in the immune system’s ability to respond to cancer. The two main types of cytokines used to treat cancer are called interferons and interleukins.
Treatment Vaccines, which work against cancer by boosting your immune system’s response to cancer cells. Treatment vaccines are different from the ones that help prevent disease.
BCG, which stands for Bacillus Calmette-Guérin, is an immunotherapy that is used to treat bladder cancer. It is a weakened form of the bacteria that causes tuberculosis. When inserted directly into the bladder with a catheter, BCG causes an immune response against cancer cells. It is also being studied in other types of cancer.
One reason that cancer cells thrive is because they are able to hide from your immune system. Certain immunotherapies can mark cancer cells so it is easier for the immune system to find and destroy them. Other immunotherapies boost your immune system to work better against cancer.
Immunotherapy Can Cause Side Effects
Immunotherapy can cause side effects, which affect people in different ways. The side effects you may have and how they make you feel will depend on how healthy you are before treatment, your type of cancer, how advanced it is, the type of therapy you are getting, and the dose. Doctors and nurses cannot know for certain how you will feel during treatment.
The most common side effects are skin reactions at the needle site. These side effects include:
Immunotherapies may also cause severe or even fatal allergic reactions. However, these reactions are rare.
How Immunotherapy Is Given
Different forms of immunotherapy may be given in different ways. These include:
Intravenous (IV) The immunotherapy goes directly into a vein.
Oral The immunotherapy comes in pills or capsules that you swallow.
Topical The immunotherapy comes in a cream that you rub onto your skin. This type of immunotherapy can be used for very early skin cancer.
Intravesical The immunotherapy goes directly into the bladder.
Where You Go for Your Immunotherapy Treatment
You may receive immunotherapy in a doctor’s office, clinic, or outpatient unit in a hospital. Outpatient means you do not spend the night in the hospital.
How Often You Will Receive Immunotherapy Treatment
How often and how long you receive immunotherapy depends on:
Your type of cancer and how advanced it is
The type of immunotherapy you get
How your body reacts to treatment
You may have treatment every day, week, or month. Some immunotherapies are given in cycles. A cycle is a period of treatment followed by a period of rest. The rest period gives your body a chance to recover, respond to the immunotherapy, and build new healthy cells.
How to Tell Whether Immunotherapy Is Working
You will see your doctor often. He or she will give you physical exams and ask you how you feel. You will have medical tests, such as blood tests and different types of scans. These tests will measure the size of your tumor and look for changes in your blood work.
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