52-Year-Old Male with Multiple Sclerosis
Mr. Ayers was diagnosed with an aggressive form of multiple sclerosis 18 years ago. His illness has not responded to conventional treatments so he's been referred to your clinic for a clinical trial.
The doctor explains that his treatment will involve giving Mr. Ayers a drug that will release stem cells from his bone marrow so they can be collected from his blood. Then Mr. Ayers will be given (1) drugs that will destroy the blood-forming cells in his bone marrow, and (2), antibodies against his T lymphocytes. Finally, the stem cells that were collected from him will be used to repopulate his bone marrow.
The doctor says, “This treatment avoids problems, such as transplant rejection, that are associated with other kinds of transplants.”
2. One reason for using Mr. Ayers's own tissue is that it can be very difficult to find a donor whose bone marrow cells match the patient's class I and II MHC proteins. What is an MHC protein? What is the difference between class I and class II MHC proteins?
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