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autologous blood and marrow transplantation - Blog Science ...

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584 Chapter 10: Graft Manipulation<br />

High-dose chemotherapy<br />

Patients were treated before autotransplant with one of three regimens. Patients<br />

who had failed prior anthracycline therapy were given induction therapy of<br />

ifosfamide, carboplatin, <strong>and</strong> etoposide (mini-ICE). 24<br />

Patients responding to mini-<br />

ICE were conditioned for transplant with 20.1 g/m 2<br />

ifosfamide, 1.8 g/m 2<br />

carboplatin, <strong>and</strong> 3.0 g/m 2<br />

etoposide (ICE). 2526<br />

Patients who had anthracyclineresponsive<br />

disease were conditioned for transplant with 90 mg/m 2<br />

mitoxantrone<br />

<strong>and</strong> 1.2 mg/m 2<br />

thiotepa (MITT) 27<br />

or with 360 mg/m 2<br />

paclitaxel plus 75 mg/m 2<br />

mitoxantrone <strong>and</strong> 0.9 g/m 2<br />

thiotepa (TNT). 28<br />

R<strong>and</strong>omization, stem cell infusion, <strong>and</strong> supportive care<br />

Forty-eight hours after high-dose chemotherapy with ICE or 7 days after MITT<br />

or TNT, stem cells were reinfused. Before r<strong>and</strong>omization, patients were stratified<br />

according to diagnosis (breast cancer vs. other) <strong>and</strong> transplant regimen (ICE,<br />

MITT, or TNT). A computer r<strong>and</strong>om number generator was employed to determine<br />

which stem cell product should be returned.<br />

The assigned product was thawed in a 37^10°C sterile water bath <strong>and</strong> reinfused<br />

by gravity flow through an infusion set equipped with a mesh filter. All patients<br />

received G-CSF (10 pg/kg intravenously per day) beginning on the day following<br />

stem cell reinfusion <strong>and</strong> continuing until after neutrophil recovery (absolute<br />

neutrophil count [ANC] >1000/pL for 3 or more consecutive days). In the event<br />

that neutrophil recovery had not been achieved in 28 days after transplant, the study<br />

design called for reinfusion of the other harvested product. This only occurred in<br />

two patients, both of whom were conditioned with MITT. Because the median day<br />

of engraftment occurred more than a week before day 28 in all strata, second<br />

product infusions were not given any special treatment in our log-rank analysis.<br />

Patients were nursed in HEPA-filtered laminar flow air rooms <strong>and</strong> provided<br />

with appropriate supportive care for all medical conditions arising in their<br />

transplant course as previously described in detail. 26,27<br />

Hematopoietic assessment of collected cells<br />

All cells collected were enumerated <strong>and</strong> their size profile recorded using a<br />

Sysmex K1000 <strong>blood</strong> cell analyzer (Baxter Diagnostic, Chicago, IL). Smears were<br />

made of all collected products, which were stained using Leukostat staining kits<br />

(Baxter Scientific, Chicago, IL). One hundred stained cells were evaluated to<br />

determine the mononuclear cell fraction. Granulocyte-macrophage colony-forming<br />

units (CFU-GM) <strong>and</strong> CD34+ cell fractions were determined as described in detail<br />

previously. 29

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