Document Detail

Methotrexate compared with mercaptopurine for early induced abortion.
MedLine Citation:
PMID:  10362152     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To compare the antimetabolites methotrexate and 6-mercaptopurine as single-agent medical abortifacients using clinical and immunohistochemical analyses. METHODS: Twenty-seven women with gestations less than 7 weeks from the last menstrual period (LMP) were randomized to receive intramuscular methotrexate, 50 mg/m2, or oral 6-mercaptopurine, 200 mg. Forty-six additional women received methotrexate after randomization was discontinued. Women returned at 2-week intervals. Those without fetal cardiac activity were followed until complete abortion. Those with fetal cardiac activity were considered failures and underwent suction abortions. Tissue collected at the time of suction abortion was analyzed with the cell-proliferation immunohistochemical assay Ki-67. RESULTS: All 12 women in the 6-mercaptopurine group had fetal cardiac activity at follow-up and underwent suction abortion; therefore, this arm of the study was discontinued. Six of the 61 women who received methotrexate had fetal cardiac activity at follow-up and also underwent suction abortion. Fetal cardiac activity was present after methotrexate in three of 55 women at less than 6 weeks from the LMP and in three of six between 6 and 7 weeks from the LMP (P < .01). Women who aborted after methotrexate started bleeding on day 19 (standard deviation [SD] 7.8), bled for 9 days (SD 4.0), and used minimal pain medications. Tissues exposed to methotrexate showed decreased Ki-67 activity compared with tissues exposed to 6-mercaptopurine (P = .003). CONCLUSION: In oral doses of 200 mg, 6-mercaptopurine did not induce early abortion. A single intramuscular dose of methotrexate used without prostaglandins induced abortion in most women at gestational ages of less than 6 weeks. Ki-67 activity was lower in a small sample of fetal tissues exposed to methotrexate than in tissues exposed to 6-mercaptopurine.
A R Davis; L Miller; H Tamimi; A Gown
Publication Detail:
Type:  Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  Obstetrics and gynecology     Volume:  93     ISSN:  0029-7844     ISO Abbreviation:  Obstet Gynecol     Publication Date:  1999 Jun 
Date Detail:
Created Date:  1999-07-07     Completed Date:  1999-07-07     Revised Date:  2009-10-26    
Medline Journal Info:
Nlm Unique ID:  0401101     Medline TA:  Obstet Gynecol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  904-9     Citation Subset:  AIM; IM    
Department of Obstetrics and Gynecology, Columbia University, New York, New York 10032, USA.
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MeSH Terms
6-Mercaptopurine / therapeutic use*
Abortifacient Agents / therapeutic use*
Abortion, Induced*
Fetus / immunology
Ki-67 Antigen / analysis
Methotrexate / therapeutic use*
Placenta / immunology
Pregnancy Trimester, First
Reg. No./Substance:
0/Abortifacient Agents; 0/Ki-67 Antigen; 50-44-2/6-Mercaptopurine; 59-05-2/Methotrexate

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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