Use of alpha-2a-interferon to treat cytogenetic relapse of chronic myeloid leukemia after marrow transplantation.

Abstract:

:Fourteen patients with cytogenetic relapse of chronic myeloid leukemia (CML) after transplantation with unmanipulated bone marrow were treated with alpha-2a-interferon. There were eight men and six women, median age, 33 years. Twelve patients received marrow from a related allogeneic donor and two received marrow from a syngeneic donor. The median percentage of Ph-positive metaphases at the time of starting interferon was 55% (10% to 87%). Daily interferon was started at a dose of 1 to 3 x 10(6) U/M2/d, depending on initial blood counts and was adjusted as tolerated to maintain the white blood count in the range of 2,000 to 3,000/microL and the platelet count greater than 60,000/microL. After a stable cytogenetic remission was achieved, the interferon dose was decreased to a maintenance level. Twelve patients achieved a complete cytogenetic remission on at least one occasion. Median time to achieve a complete cytogenetic remission was 7.5 months (range, 1.5 to 12). Eight patients remain in cytogenetic remission for 10+ to 54+ months from the time of first documented remission. After complete cytogenetic remission was established, nine patients were tested for the presence of the mRNA transcript of the bcr/abl fusion gene by polymerase chain reaction (PCR) testing. Four patients were PCR-negative on at least one occasion: two patients were PCR-negative on a single occasion; one patient had serial tests, which were PCR-negative; and one patient had serial PCR-negative peripheral blood tests with a single PCR-positive bone marrow obtained concurrently with a negative peripheral blood test. Median follow-up time for all patients is 44 months (range, 20 to 64). Interferon was generally well tolerated; only one responding patient was unable to continue interferon because of toxicity. Interferon induces durable cytogenetic remissions in a significant proportion (57%) of patients with cytogenetic relapse following bone marrow transplantation (BMT) without causing life-threatening toxicities.

journal_name

Blood

journal_title

Blood

authors

Higano CS,Chielens D,Raskind W,Bryant E,Flowers ME,Radich J,Clift R,Appelbaum F

subject

Has Abstract

pub_date

1997-10-01 00:00:00

pages

2549-54

issue

7

eissn

0006-4971

issn

1528-0020

journal_volume

90

pub_type

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