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Mouse trophoblast giant cells protect the developing fetus from the maternal immune system by expressing an enzyme that inhibits maternal T cell responses.

Specialized dendritic cells that inhibit immune responses accumulate in lymph nodes that drain a site of tumor growth in an experimental mouse system.

Various cell types lining the maternal-fetal interface and stained with a cocktail of antibodies and then visualized by fluorescent microscopy.

Cluster of cells expressing the enzyme indoleamine 2,3 dioxygenase in mouse spleen. These specialized cells, discovered by MCG Immunotherapy Center investigators, offer potential new ways to treat autoimmune diseases, such as diabetes (type I), and to protect organ transplants from rejection

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MCG Immunotherapy Center

Immunotherapy Center - Vision and Mission
The Immunotherapy Center is a new center of research excellence at the Medical College of Georgia. Many diseases develop because the immune system is over-active, as in autoimmune diseases (e.g. type I diabetes, rheumatoid arthritis, multiple sclerosis, lupus etc.), or under-active, as in cancer and chronic infectious diseases (e.g. HIV, Hepatitis, TB, Listeria, etc.).  The primary role of the immune system is to eliminate microbial infections that cause pathogenic disease.  To perform this key function immune cells must recognize and respond to ‘foreign’ molecules (antigens) expressed by invading pathogens leading to the destruction of pathogens and of cells they infect.  The ability of immune cells to recognize a huge range of different antigens explains why organs transplanted between individuals are rejected unless immunosuppressive drugs are given to patients to suppress transplant rejection.  Autoimmune diseases arise because the immune system is not regulated properly and immune cells start to destroy healthy cells and tissues such as cells that make insulin, leading to type 1 diabetes.  Likewise, over-active immune cells contribute to inflammatory processes that lead to cardiovascular disease over time.   In contrast, diseases like cancer and chronic infections arise, in part, because the immune system is abnormally suppressed, leading to a state of specific tolerance, which allows tumors to grow and infections to persist in people with otherwise effective immune systems.  The mission of the MCG Immunotherapy Center is to discover fundamental molecular mechanisms and cellular processes that control the immune system and to translate this new knowledge into innovative approaches to prevent and treat clinical disease.  To achieve this goal, scientists using cell and animal model systems are working with clinical investigators and clinical faculty to increase understanding of immune system function and to apply this knowledge to treat disease in the clinic.  In recognition of the critical role of the immune system in cancer etiology, the Immunotherapy Center will be relocated to the new Cancer Research Center in 2006, which is equipped with new research facilities to support basic and clinical research, including new facilities essential to promote studies on patient materials for pre-clinical research and experimental clinical trials.

Immunotherapy Center - Research Programs
Research at the Immunotherapy Center is focused on fundamental mechanisms that regulate immune system activity, which help to prevent autoimmune diseases, but allow tumors and chronic infections to persist.  Research goals are to discover how to manipulate these mechanisms to stimulate the immune system to attack tumors and infected cells, and to prevent the immune system destroying healthy cells and transplanted organs and tissues.   The Center Director, Andrew Mellor Ph.D. and Associate Director, David Munn M.D., lead research groups studying how cells expressing indoleamine 2,3 dioxygenase (IDO) suppress immune responses, a mechanism first discovered at MCG in 1998.  Drs. Mellor and Munn continue to describe new insights into this mechanism that provide novel opportunities to treat patients.  With the support of the National Cancer Institute (NIH) and a corporate partner, experimental clinical trials to test if pharmacologic inhibition of IDO will improve treatments for cancer and chronic infections are planned in the near the future.  Makio Iwashima Ph.D. and Pandelakis Koni Ph.D. lead research groups studying T cells and regulatory T cells that inhibit immune responses mediated by other T cells.  Through fundamental studies, these investigators are discovering new ways to manipulate T cells to improve disease outcomes in the clinic.  Michiko Shimoda Ph.D. is studying the role of B cells in autoimmune disease and protective memory following vaccination.  Stephen Peiper M.D. (chair, Department of Pathology) leads the Chemokine Biology Program, which focuses on interfering with chemokine-receptor interactions that allow tumors and HIV to evade immune responses.   Zixuan Wang Ph.D. is the scientific Director of GEMLab LLC, a new molecular diagnostic laboratory based in the Department of Pathology responsible for developing, validating and implementing new clinical diagnostic tests. 

Immunotherapy Center - Leadership and Administration
The MCG Immunotherapy Center is lead by Drs. Mellor and Munn who founded the Center in 2002.  As the Director of the Immunotherapy Center, Dr. Mellor reports to the Dean of the School of Medicine and is responsible for overall development of research programs and administration.  As the Associate Director, Dr. Munn is primarily responsible for developing clinical research programs.  The Immunotherapy Center Business Manager is Ms. Phyllis McKie.

 

Dr. Andrew Mellor

Andrew Mellor, Ph.D.

Immunotherapy Center Director and Georgia Research Alliance Eminent Scholar in Immunogenetics

Dr. David Munn

David Munn, M.D.

Immunotherapy Center Associate Director and Professor of Pediatrics

Contact Information:
Immunotherapy Center
Medical College of Georgia
1120 15th Street, CA-2006
Augusta, GA  30912-2600
(706) 721-8735
(706) 721-8732, fax

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Please email comments, suggestions or questions to:
Andrew Mellor, Ph.D.,

October 24, 2006