Protocol Number: 01-C-0196
Patients 21 years of age or younger with acute lymphoblastic leukemia (ALL), acute non-lymphoblastic leukemia) ANLL), juvenile myelomonocytic leukemia (JMML), or chronic myelogenous leukemia (CML) who do not respond to standard therapy may be eligible for this study. Candidates will be screened with a history and physical examination, eye examination, blood and urine tests, lumbar puncture (spinal tap) and bone marrow aspiration. Lumbar puncture is done to examine the cerebrospinal fluid (CSF), which bathes the brain and spinal cord. After a local anesthetic is administered, a needle is inserted in the space between the bones in the lower back where the CSF circulates below the spinal cord. A small amount of fluid is collected through the needle. For the bone marrow test, the hip area is anesthetized and a special needle is used to draw bone marrow from the hipbone. Patients enrolled in the study will take R115777 tablets every 12 hours for 21 days, followed by a 7-day rest period, completing one treatment cycle. To determine the highest dose of drug that can be given safely, the starting dose will be low and will be increased gradually in small groups of patients. Treatment cycles will continue unless unacceptable side effects occur or the leukemia does not respond to the drug. Patients will undergo the following tests and procedures to monitor for side effects and evaluate the response of the leukemia to treatment: - Physical examinations - every week, initially - Eye examinations - regularly - Blood tests- periodically throughout treatment - Bone marrow examination - before the start of each treatment cycle for three cycles and then less often - Buccal swab (scraping the inside of the cheek with a tongue depressor to collect a cell sample) - before the first treatment dose and once during the first treatment cycle. Additional blood samples will be collected as follows: - To study the pharmacology of R115777, 12 small blood samples will be collected on days 1 and 2 after the first dose of R115777, and one sample will be taken between days 6 and 10 during the first treatment cycle only. If possible, the blood will be drawn through an indwelling catheter to avoid multiple needle sticks. - Samples will be collected before the first treatment dose, once during the first treatment cycle, and before cycles 3,6, 9 and 12, to measure the effect of R115777 on a substance called nerve growth factor to see if it can predict which patients may be at risk for developing side effects from R115777
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