Biological Therapy For Cancer Treatment

What is biological therapy?

Biological therapy (also called immunotherapy, biological response modifier therapy, or biotherapy) uses the body''s immune system to fight cancer. The cells, antibodies, and organs of the immune system work to protect and defend the body against foreign invaders, such as bacteria or viruses. Physicians and researchers have found that the immune system might also be able to both determine the difference between healthy cells and cancer cells in the body, and to eliminate the cancer cells.

Biological therapies are designed to boost the immune system, either directly or indirectly, by assisting in the following:

• making cancer cells more recognizable by the immune system, and therefore more susceptible to destruction by the immune system
  
  
• boosting the killing power of immune system cells
  
  
• changing the way cancer cells grow, so that they act more like healthy cells
  
  
• stopping the process that changes a normal cell into a cancerous cell
  
  
• enhancing the body''s ability to repair or replace normal cells damaged or destroyed by other forms of cancer treatment, such as chemotherapy or radiation
  
  
• preventing cancer cells from spreading to other parts of the body

How does the immune system fight cancer?

The immune system includes different types of white blood cells - each with a different way to fight against foreign or diseased cells, including cancer:

• lymphocytes - white blood cells, including B cells, T cells, and NK cells.
  
  
  • B cells - produce antibodies that attack other cells.
    
    
  • T cells - directly attack cancer cells themselves and signal other immune system cells to defend the body.
    
    
  • natural killer cells (NK cells) - produce chemicals that bind to and kill foreign invaders in the body.
    
    
• monocytes - white blood cells that swallow and digest foreign particles.

These types of white blood cells - B cells, T cells, natural killer cells, and monocytes - are in the blood and thus circulate to every part of the body, providing protection from cancer and other diseases. Cells secrete two types of substances: antibodies and cytokines. Antibodies respond to (harmful) substances that they recognize, called antigens. Specific (helpful) antibodies match specific (foreign) antigens by locking together. Cytokines are proteins produced by some immune system cells and can directly attack cancer cells. Cytokines are "messengers" that "communicate" with other cells.

What are the different types of biological therapies?

There are many different types of biological therapies used in cancer treatment, including the following:

• nonspecific immunomodulating agents
  Nonspecific immunomodulating agents are biological therapy drugs that stimulate the immune system, causing it to produce more cytokines and antibodies to help fight cancer and infections in the body. Fighting infection is important for a person with cancer.
  
  
• biological response modifiers (BRMs)
  Biological response modifiers (BRMs) change the way the body''s defenses interact with cancer cells. BRMs are produced in a laboratory and given to patients to:
  
  
  • boost the body''s ability to fight the disease.
  • direct the immune system''s disease fighting powers to disease cells.
  • strengthen a weakened immune system.
    

  BRMs include interferons, interleukins, colony-stimulating factors, monoclonal antibodies, cytokine therapy, and vaccines:

  • interferons (IFN)
    Interferons (IFN) are a type of biological response modifier that naturally occurs in the body. They are also produced in the laboratory and given to cancer patients in biological therapy. They have been shown to improve the way a cancer patient''s immune system acts against cancer cells. Interferons may work directly on cancer cells to slow their growth, or they may cause cancer cells to change into cells with more normal behavior. Some interferons may also stimulate natural killer cells (NK) cells, T cells, and macrophages - types of white blood cells in the bloodstream that help to fight cancer cells.
    
    
  • interleukins (IL)
    Interleukins (IL) stimulate the growth and activity of many immune cells. They are proteins (cytokines) that occur naturally in the body, but can also be made in the laboratory. Some interleukins stimulate the growth and activity of immune cells, such as lymphocytes, which work to destroy cancer cells
    
    
  • colony-stimulating factors (CSFs)
    Colony-stimulating factors (CSFs) are proteins given to patients to encourage stem cells within the bone marrow to produce more blood cells. The body constantly needs new white blood cells, red blood cells, and platelets, especially when cancer is present. CSFs are given, along with chemotherapy, to help boost the immune system. When cancer patients receive chemotherapy, the bone marrow''s ability to produce new blood cells is suppressed, making patients more prone to developing infections. Parts of the immune system cannot function without blood cells, thus colony-stimulating factors encourage the bone marrow stem cells to produce white blood cells, platelets, and red blood cells. With proper cell production, other cancer treatments can continue enabling patients to safely receive higher doses of chemotherapy.
    
    
  • monoclonal antibodies
    Monoclonal antibodies are agents, produced in the laboratory, that bind to cancer cells. When cancer-destroying agents are introduced into the body, they seek out the antibodies and kill the cancer cells. Monoclonal antibody agents do not destroy healthy cells.
    
    
  • cytokine therapy
    Cytokine therapy uses proteins (cytokines) to help your immune system recognize and destroy those cells that are cancerous. Cytokines are produced naturally in the body by the immune system, but can also be produced in the laboratory. This therapy is used with advanced melanoma and with adjuvant therapy (therapy given after or in addition to the primary cancer treatment). Cytokine therapy reaches all parts of the body to kill cancer cells and prevent tumors from growing.
    
    
  • vaccine therapy
    Vaccine therapy is still an experimental biological therapy. The benefit of vaccine therapy has not yet been proven. With infectious diseases, vaccines are given before the disease develops. Cancer vaccines, however, are given after the disease develops, when the tumor is small. Scientists are testing the value of vaccines for melanoma and other cancers. Sometimes, vaccines are combined with other therapies such as cytokine therapy.

Are there side effects of biological therapies?

As each person''s individual medical profile and diagnosis is different, so is his/her reaction to treatment. Side effects may be severe, mild, or absent. Be sure to discuss with your cancer care team any/all possible side effects of treatment before the treatment begins.

Side effects of biological therapy, which often mimic flu-like symptoms, vary according to the type of therapy given and may include the following:

• fever
• chills
• nausea
• vomiting
• loss of appetite
• fatigue

Specifically, cytokine therapy often causes fever, chills, aches, and fatigue. Other side effects include a rash or swelling at the injection site. Therapy can cause fatigue and bone pain and may affect blood pressure.

Cancer Diagnosis and Treatment Programs at Rush University Medical Center in Chicago At Rush, we offer a range of standard and investigational therapies for the treatment of cancer. We have more than a dozen programs specializing in the treatment of specific cancers, including: Bone Cancer Brain Cancer Breast Cancer Colorectal Cancer Gynecological Cancers Head and Neck Cancers Hematological Malignancies (cancers of the blood and lymph system) Leukemia Lung Cancer Lymphoma Myeloma Orthopedic Cancers Prostate Cancer Radiation Oncology Skin Cancers Rush cancer programs are approved by the Commission on Cancer of the American College of Surgeons. Only one in four hospitals that treat cancer receive this special approval. Click here to visit the home page for Cancer Programs at Rush. Cancer Screening and Prevention Cancer screening and prevention are priorities at Rush. Through genetic testing, counseling and advanced techniques for early detection, Rush helps people with a strong history of breast, ovarian, colon and other cancers. And in our state-of-the-art mammography center, we have one of the city’s finest teams of radiologists dedicated to early detection of breast cancer. Breast Imaging Center Genetic Diagnosing and Counseling Center Inherited Susceptibility to Cancer Center Skin Cancer Detection Cancer Support Programs at Rush Cancer is not only a physical ordeal, it is also an emotional one, affecting cancer patients, their family and friends. To help address the whole person, we offer a number of resources to help patients and their loved ones cope in this difficult time. For information on the cancer support programs at Rush click here. Clinical Trials Rush offers a number of clinical trials of experimental cancer treatments. Use the links below to search for studies for a particular form of cancer. If you are interested in exploring your eligibility for one of our open trials, please call (312) 942-8312. If we do not list trials for a particular type of cancer, please feel free to call us to discuss other treatment options. For information on cancer clinical trial programs at Rush click here. Find a Specialist at Rush To find a cancer specialist at Rush, click on one of the following links: Oncology Gynecologic Oncology Orthopedic Oncology Pediatric Hematology-Oncology Radiation Oncology Surgical Oncology To find specialist at Rush in other cancer-related areas, click on one of the following links: Bone Marrow Transplant General Surgery Hematology Or make an appointment with a doctor at Rush by calling our toll-free physician referral number: (888) 352-RUSH. To reach the hospital operator, call (312) 942-5000. If you have difficulty hearing, call (312) 942-2207 (TTY/TTD).

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