Immunotherapy is a modern medical treatment that helps the immune system identify and respond to harmful substances, abnormal cells, or specific allergens. It is used in several areas of medicine, including allergy treatment and cancer care. The type of immunotherapy recommended depends on the condition, its severity, the patient’s age, medical history, and treatment goals. Understanding the different types can help patients have a more informed discussion with their healthcare provider.
What Is Immunotherapy?
Immunotherapy is a treatment approach that modifies or supports the body’s immune response. Instead of simply treating symptoms, some forms of immunotherapy aim to change how the immune system reacts to a particular trigger.
In allergy care, immunotherapy gradually exposes the body to carefully controlled amounts of an allergen. Over time, this may reduce sensitivity and improve allergy symptoms. In cancer treatment, immunotherapy can help the immune system recognize and attack cancer cells.
Because immunotherapy can work differently from conventional medicines, it should always be prescribed and monitored by a qualified healthcare professional.
Major Types of Immunotherapy
1. Allergy Shots or Subcutaneous Immunotherapy
Subcutaneous immunotherapy, commonly called allergy shots, is one of the established forms of allergy immunotherapy. It involves injecting gradually increasing or maintenance doses of specific allergens under the skin.
The treatment may be considered for people with allergies such as:
- Pollen allergy
- Dust mite allergy
- Certain animal allergies
- Mold allergy
- Insect venom allergy
The goal is to reduce the immune system’s sensitivity to the allergen. Treatment usually requires regular visits over an extended period, and the exact schedule varies from patient to patient.
2. Sublingual Immunotherapy
Sublingual immunotherapy, or SLIT, involves placing an allergen-containing tablet or preparation under the tongue. It allows certain allergens to be introduced through the oral mucosa instead of through injections.
SLIT is used for selected allergies and may be suitable for some patients who prefer an alternative to regular allergy injections. However, not every allergen is available in a sublingual treatment format, so a specialist needs to determine whether it is appropriate.
3. Allergen Immunotherapy for Insect Venom Allergy
People who experience serious allergic reactions to insect stings, particularly from certain bees or wasps, may be evaluated for venom immunotherapy.
This treatment uses controlled doses of the relevant insect venom to reduce the risk of severe allergic reactions from future stings. Because insect-sting reactions can potentially be life-threatening, venom immunotherapy should be managed by an allergy specialist.
4. Immune Checkpoint Inhibitors
Immune checkpoint inhibitors are a type of cancer immunotherapy. Cancer cells can sometimes use natural immune-control mechanisms, known as checkpoints, to avoid being attacked by the immune system.
Checkpoint inhibitor medicines block certain immune checkpoint pathways, allowing immune cells to recognize and attack cancer cells more effectively.
These medicines may be used for several types of cancer, depending on the individual diagnosis and treatment plan. Because they stimulate immune activity, they can also cause immune-related side effects and require careful medical monitoring.
5. Monoclonal Antibody Therapy
Monoclonal antibodies are laboratory-created proteins designed to target specific molecules involved in disease. Some monoclonal antibodies are considered forms of immunotherapy because they help the immune system target specific cells or biological pathways.
Depending on the medicine, monoclonal antibody treatments may be used in cancer and other immune-related conditions. Their effects and potential side effects vary significantly between medicines.
6. Cancer Vaccines
Cancer vaccines are another area of immunotherapy. Unlike traditional vaccines designed primarily to prevent infectious diseases, some cancer vaccines are designed to stimulate an immune response against cancer-related targets.
Certain cancer vaccines are used for specific situations, while others continue to be investigated through clinical research. Their availability and suitability depend on the cancer type and the patient’s individual circumstances.
7. T-Cell-Based Immunotherapy
T cells are important immune cells that can identify and destroy abnormal cells. Some advanced cancer treatments involve modifying or using a patient’s own immune cells to improve their ability to recognize cancer.
CAR T-cell therapy is one example. In this treatment, T cells are collected from the patient, modified in a laboratory, and then returned to the body. The modified cells are designed to recognize specific targets on cancer cells.
Because these therapies can cause serious reactions in some patients, they are generally provided at specialized medical centers with appropriate monitoring.
How Does Allergy Immunotherapy Work?
Allergy immunotherapy works by exposing the immune system to controlled amounts of an allergen over time. The treatment is intended to help the immune system become less reactive to that allergen.
Before starting treatment, an allergy specialist generally reviews the patient’s symptoms, medical history, and allergy test results. The selected allergens and treatment schedule are then individualized.
It is important to understand that immunotherapy is not an instant solution. Improvement may take time, and patients need to follow their specialist’s treatment schedule consistently.
Who May Benefit From Allergy Immunotherapy?
Allergy immunotherapy may be considered when allergy symptoms are persistent, significantly affect daily life, are difficult to control with other treatments, or when avoiding the allergen is difficult.
It may be particularly useful for selected patients with allergic rhinitis, certain asthma-related allergies, insect venom allergy, or other specific allergic conditions.
However, immunotherapy is not appropriate for everyone. A qualified specialist should determine whether the potential benefits outweigh the risks.
Possible Side Effects of Immunotherapy
Side effects depend on the type of immunotherapy being used.
With allergy shots, some patients may experience redness, swelling, itching, or discomfort at the injection site. Occasionally, more serious allergic reactions can occur, which is why patients are generally observed after injections.
Sublingual immunotherapy may cause mouth or throat itching or irritation, particularly during the early stages of treatment.
Cancer immunotherapies can produce different reactions, including fatigue, skin changes, gastrointestinal symptoms, or inflammation affecting certain organs. Patients receiving cancer immunotherapy should promptly report unusual or worsening symptoms to their healthcare team.
Choosing the Right Immunotherapy
The right treatment depends on the condition being treated. Allergy immunotherapy and cancer immunotherapy are very different approaches, even though both involve modifying the immune response.
If you are considering immunotherapy for allergies, consult an experienced allergy specialist for proper evaluation and treatment planning. The Allergy & Asthma Treatment Center provides specialized care for allergy and asthma-related concerns, helping patients understand their treatment options and receive an individualized management plan.
Conclusion
Immunotherapy includes several treatment approaches, ranging from allergy shots and sublingual therapy to advanced cancer treatments such as checkpoint inhibitors and T-cell therapies. Each type works differently and is designed for particular medical conditions.
If persistent allergies are affecting your quality of life, professional evaluation can help determine whether immunotherapy may be suitable for you. At the Allergy & Asthma Treatment Center, patients can seek expert guidance for allergy-related concerns and discuss appropriate treatment options with a qualified healthcare professional.
