Immunotherapy is a treatment used to treat various health problems, such as cancer, infections, and other diseases, by using the immune system. Immunotherapy aims to use the body's own defenses to fight diseases.

Immunotherapy can be administered in many different ways. For example, cancer immunotherapy uses T-cells, or natural killer cells, to increase the activity of cells that recognize and kill cancer cells. These immunotherapy methods can stop the growth of cancer cells and prevent their spread.

Another example of immunotherapy is used to block the antibodies that cause allergic reactions. This immunotherapy can reduce or eliminate the symptoms caused by allergic reactions.

Immunotherapy can be used alongside other cancer treatments, such as chemotherapy and radiation therapy, and in some cases, may provide better results. However, immunotherapy can cause some side effects, so doctors evaluate the patient's condition and the suitability of immunotherapy before treatment.

How does immunotherapy affect cancer?

Immunotherapy works by activating and strengthening the natural immune system against cancer cells. The immune system normally protects the body from infection and disease and plays a key role in destroying cancer cells.

Cancer cells can use various mechanisms to evade the immune system. By targeting these mechanisms, immunotherapy helps the immune system better recognize and destroy cancer cells. This can help stop their growth and spread.

Some immunotherapy drugs work by targeting specific proteins on the surface of cancer cells. For example, pembrolizumab and nivolumab, used in many melanoma and lung cancer patients, block the action of a protein called PD-1 on cancer cells, helping the immune system better recognize and destroy cancer cells.

Another immunotherapy method involves inducing T cells to directly attack cancer cells. This involves custom-engineered T cells being modified to attack cancer cells and then injected back into the patient. This method is used in certain blood cancers, such as leukemia.

The effectiveness of immunotherapy in cancer treatment can vary depending on the type and stage of cancer, and the patient's condition. For some cancer types, immunotherapy may offer better results than other treatment options. However, immunotherapy can cause side effects and may not be suitable for every patient. Therefore, the patient's condition should be carefully evaluated before administering the treatment.

What are the types of immunotherapy?

Immunotherapy encompasses a variety of treatment methods that target immune system cells or molecules. Types of immunotherapy can be categorized as follows:

• Antibody treatments: These treatments target specific proteins found on cancer cells. These proteins help cancer cells evade the immune system. Antibody treatments bind to cancer cells, prompting the immune system to recognize and destroy them. Examples include rituximab, trastuzumab, and pembrolizumab.
• Cytokine therapies: These treatments target molecules called cytokines, which are produced by immune cells. Cytokines regulate the immune system's activation and encourage it to attack cancer cells. Treatment can be delivered using cytokines such as interleukin-2 (IL-2), alpha interferon, and gamma interferon.
• T-cell therapies: These treatments use a patient's own T cells to attack cancer cells. In this method, the patient's T cells are collected, modified in a specific way in the laboratory, and then injected back into the patient. The modified T cells are specifically designed to recognize and destroy cancer cells. CAR-T cell therapy is one example of this method.
• Vaccine treatments: These treatments work by using a vaccine to allow the patient's immune system to better recognize and destroy cancer cells. Vaccines target specific proteins on cancer cells, increasing immune system activation. Examples include the sipuleucel-T and HPV vaccines.
• Checkpoint inhibitors: These treatments increase the immune system's activation, allowing it to respond more effectively to cancer cells. Checkpoint inhibitors work by blocking the activity of proteins that inhibit the immune system's suppressive effects. Drugs such as pembrolizumab and nivolumab may be used in this method.

What are the benefits of immunotherapy?

Immunotherapy is a method used to treat cancer by targeting immune system cells or molecules. The benefits of immunotherapy may include:

• High response rate: Immunotherapy may have higher response rates than chemotherapy or radiation therapy for some types of cancer. In some cases, the cancer can be completely eliminated or the disease can be kept under control for longer periods.
• Fewer side effects: Unlike chemotherapy, immunotherapy uses targeted cells to attack only cancer cells. Therefore, side effects are generally less severe than with chemotherapy.
• Long-term response: Immunotherapy can provide a long-lasting response in some types of cancer. In some cases, the disease may not recur for many years after treatment.
• It can be combined: Immunotherapy can be combined with other cancer treatments. For example, immunotherapy and chemotherapy can be used together and complement each other, providing a more effective treatment.
• Can be used in multiple cancer types: Immunotherapy can be used in multiple cancer types. Some immunotherapy drugs are approved as treatments for different types of cancer.

Despite these benefits, immunotherapy is not yet effective for all cancer types and may not be suitable for every patient. Careful evaluation and consideration of the patient's condition are necessary before and during immunotherapy treatment.

How is immunotherapy administered?

1. mMonoclonal antibodies: This treatment uses antibodies developed against specific targets found on the surface of cancer cells (for example, PD-1 or PD-L1). These antibodies facilitate the immune system's recognition of cancer cells, enabling them to trigger targeted immune responses. This treatment is administered intravenously.
2. T-cell therapy: In this procedure, a patient's own T cells are grown in a laboratory and customized to attack cancer cells. During this customization, the T cells are engineered to bind to specific targets on the cancer cells' surfaces. This treatment is administered intravenously.
3. Cytokines: This treatment utilizes cytokines produced by immune system cells. Cytokines increase the activation of immune cells, strengthening their fight against cancer cells. This treatment is administered intravenously or by injection directly into the tumor site.
4. Vaccines: This treatment uses vaccines designed to cause the immune system to recognize certain components of cancer cells, specifically specific targets found on the surface of cancer cells. These vaccines are designed to stimulate the immune system to attack the cancer cells. This treatment can be administered by injection or intravenously.

Immunotherapy treatment can be administered in different ways, depending on the tumor type, stage, and the patient's overall health. The patient's condition is closely monitored before and during treatment, and the treatment plan may be adjusted if necessary.

Does every patient benefit from immunotherapy?

No, immunotherapy may not be equally effective in every patient. The effectiveness of immunotherapy can vary across different cancer types, even among patients with the same cancer. This is because cancer cells and immune system responses can vary from person to person. Furthermore, immunotherapy can have side effects, and these side effects can affect patients to varying degrees.

However, immunotherapy can offer hope to patients even when other cancer treatments are ineffective or have severe side effects. Because immunotherapy can identify and destroy cancer cells by the immune system, immunotherapy can be beneficial if the cancer cells have a target that the immune system can recognize.

Who can receive immunotherapy?

Immunotherapy is an increasingly common treatment modality for cancer. However, it may not be appropriate for every type or stage of cancer. Immunotherapy is typically used when other treatments have not been effective or when the patient cannot tolerate other treatments.

Immunotherapy can also be used as a standard treatment for some types of cancer. The most common uses for immunotherapy include melanoma, lung cancer, kidney cancer, bladder cancer, Hodgkin lymphoma, breast cancer, and colorectal cancer. However, immunotherapy is also used for other types of cancer, and research is ongoing.

How long does immunotherapy last?

The duration of immunotherapy treatment can vary depending on the type of cancer, the goal of treatment, and the patient's condition. For some types of cancer, immunotherapy may be used alone or in conjunction with other treatments, while for others, immunotherapy may be used only as a supportive treatment.

Immunotherapy treatments typically last from a few weeks to several months. In some cases, immunotherapy treatments may be administered at regular intervals for several years.

Immunotherapy treatment requires a personalized treatment plan based on the patient's overall health, the stage of the cancer, and the goal of treatment.