Abstract:
:The anti-CD33 antibody calicheamicinconjugate gemtuzumab ozogamicin (GO) was used to treat 16 patients with acute promyelocytic leukemia (APL) who had relapsed at the molecular level. Of these patients, 8 were experiencing a first, 5 a second, 2 a third, and 1 a fourth relapse. GO was administered at 6 mg/m2 for 2 doses, and patients achieving a new molecular remission (MR) (ie, negativity of the reverse transcriptase-polymerase chain reaction [RT-PCR] test for PML/RARalpha) received a third dose. MR was obtained in 9 (91%) of 11 patients tested after 2 doses and in 13 (100%) of 13 patients tested after the third dose. Of the 3 remaining patients, 1 achieved MR after one GO administration and received no further therapy owing to hepatic toxicity, and 2 showed disease progression during treatment. Quantitative RT-PCR studies showed that responding patients experienced a dramatic decline (at least 2 logs) of the PML/RARalpha transcript after the first GO dose. Of 14 responders, 7 remained in sustained MR for a median of 15 months (range, 7-31 months) while 7 experienced relapse at 3 to 15 months. GO was administered again in 2 patients with relapse, and both obtained a new MR. These data indicate that GO is highly effective as a single treatment for patients with molecularly relapsed APL including those with very advanced disease.
journal_name
Bloodjournal_title
Bloodauthors
Lo-Coco F,Cimino G,Breccia M,Noguera NI,Diverio D,Finolezzi E,Pogliani EM,Di Bona E,Micalizzi C,Kropp M,Venditti A,Tafuri A,Mandelli Fdoi
10.1182/blood-2004-04-1550subject
Has Abstractpub_date
2004-10-01 00:00:00pages
1995-9issue
7eissn
0006-4971issn
1528-0020pii
2004-04-1550journal_volume
104pub_type
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