Trial Information

Dose-Intense Yttrium-90 Ibritumomab Tiuxetan (Zevalin)-Containing Non-Myeloablative Conditioning for Allogeneic Stem Cell Transplantation in B-cell Malignancies

Study Drug Administration and Procedures:

The chemotherapy, some of the other drugs in this study, and the stem cell transplant will
be given by vein through your central venous catheter (CVC). A central venous catheter is a
sterile flexible tube that will be placed into a large vein while you are under local
anesthesia and will remain in your body during treatment. Your doctor will explain this
procedure to you in more detail, and you will be required to sign a separate consent form.
Blood samples will also be drawn through the CVC.

On Days -22 (22 days before you receive the stem cell transplant), you will receive
rituximab by vein over 3-4 hours. You will then receive 111In-ibritumomab tiuxetan by vein
over 30 minutes.

From Day -22 through Day -16, you will have scans called whole-body planar scintigraphy
imaging. In these scans, a special camera will capture 2-dimensional images of the whole
body to see where the radioactive 111In- ibritumomab tiuxetan that was injected on Day -22
has spread. No additional radiation will be used in this scan. Scintigraphy will be
performed right after the injection, then 3-6 hours after the injection, then 24, 72, and
144 hours (+/- 2 hours) after the injection.

After the last scintigraphy imaging scan, the scans will be reviewed to learn how much
radiation has traveled to different organs and to decide how much 90Y- ibritumomab should be
used.

On Day-14, you will receive rituximab by vein over 3-4 hours. You will then receive the
calculated dose of 90Y-ibritumomab tiuxetan by vein over 30 minutes.

On Days -5, -4, and -3, you will receive fludarabine and bendamustine by vein over 1 hour
each day.

On Days -3 through Day 100, if your stem cells are from cord blood, you will receive
mycophenolate mofetil (MMF) by vein or by mouth. MMF is designed to block the donor cells
from growing and spreading in a way that could cause graft versus host disease (GVHD -- a
condition in which transplanted tissue attacks the recipient's body).

Starting on Day -2, if your stem cells are from a related or matched unrelated donor, you
will receive tacrolimus by vein as a continuous (nonstop) infusion until you are able to
take it by mouth to help prevent GVHD. You will then take tacrolimus by mouth 2 times a day
for about 3 months. After that, your tacrolimus dose may be lowered if you do not have
GVHD. Your doctor will discuss this with you.

On Days -2 and -1, if your stems cells are from a matched unrelated donor or from cord
blood, you will receive thymoglobulin (ATG) by vein over about 4 hours. ATG is designed to
weaken your immune system to reduce the risk of rejecting of the transplant.

On Day 0, you will receive the blood stem cells by vein over about 30-45 minutes. Blood
(less than 1 teaspoon) will also be drawn to measure how much (if any) radiation from the
90Y- ibritumomab tiuxetan is left in the blood.

Starting on Day 0, if your stem cells are from cord blood, you will receive filgrastim
(G-CSF) through a needle under the skin 1 time a day every day until your white blood count
begins to recover. G-CSF is designed to help cells in the bone marrow to divide, which
helps raise white blood cells counts more quickly, lower fever, and decrease the risk of
infection.

On Days 1, 3, and 6, if your stem cells are from a related or matched unrelated donor, you
will receive methotrexate over 30 minutes each day by vein to help prevent GVHD. Patients
receiving a matched unrelated donor will also be given methotrexate on Day 11 after the
transplant.

Starting on Day 7, if your stem cells are from a related or matched unrelated donor, you
will receive G-CSF through a needle under the skin 1 time a day every day until your white
blood count begins to recover.

When your doctor thinks they are needed, you will also receive antibiotics and antifungal
drugs to help prevent and/or treat infections. Your doctor will tell you more about how
these drugs are given and possible side effects.

You will be in the hospital for about 3-4 weeks after you receive the stem cell transplant.
During this time, the following tests and procedures will be performed at any point that
your doctor thinks they are needed:

- You will have a physical exam, including measurement of your vital signs (blood
pressure, heart rate, temperature, and breathing rate).

- You will be asked about how you are feeling and about any side effects you may be
having.

- Blood (about 4-6 teaspoons) will be collected for routine tests, to check your kidney
and liver function, and to learn if and how well the transplant is working.

The following may also be performed if at any point the doctor thinks they are needed:

- You may have imaging scans to check the status of the disease and/or to check for
possible infections.

- You may have a bone marrow biopsy to check the status of the disease. To collect a
bone marrow biopsy, an area of the hip or other site is numbed with anesthetic, and a
small amount of bone marrow and bone is withdrawn through a needle.

- You may have transfusions of blood and/or platelets.

You must stay in the Houston area for about 100 days after the stem cell transplant.

Long-Term Follow-Up:

About 3, 6, and 12 months after the stem cell transplant:

- Blood (about 6 teaspoons) will be collected for routine tests, to check kidney and
liver function, and to see how well the transplant has taken.

- You will have CT and PET scans to check the status of the disease.

- You will have a bone marrow biopsy/aspirate to check the status of the disease.

About 2 and 3 years after the stem cell transplant, you will receive a phone call that will
take less than 10 minutes to learn how you are doing.

Length of Study:

You will be on study for up to about 3 years. You may be taken off study early if the
disease gets worse, if you have any intolerable side effects, of if you are unable to follow
study directions.