Navigation Links
Leukemia Therapy With Imatinib During Pregnancy May Cause Infant Abnormalities
Date:3/5/2008

WASHINGTON, March 5 /PRNewswire-USNewswire/ -- While doctors already face many challenges in treating patients with cancer, treating pregnant women with the disease, in particular, can be quite difficult as studies suggest that certain therapies can harm developing fetuses. According to the results of a study prepublished today online in Blood, the official journal of the American Society of Hematology, expectant women treated with imatinib, a commonly used therapy for chronic myeloid leukemia (CML), may be at moderate risk of developing fetal abnormalities.

Imatinib was introduced for the treatment of CML in 1998 and has become a primary therapy for most patients, turning the previously fatal disease into a mostly chronic condition in the last decade. The drug's label warns that women of child-bearing age should avoid pregnancy while taking the drug based on earlier studies that suggested it may penetrate the placenta and cause damage to developing cells.

The retrospective study reviewed records of 180 cases of CML treatment during pregnancy reported to Novartis, the Hammersmith Hospital in London, or The University of Texas M. D. Anderson Cancer Center to determine the real risks of imatinib therapy. Specific outcomes data were available for 125 of the cases, as 55 cases had incomplete pregnancy-related data.

Half of the pregnancies resulted in the birth of normal live infants (n=63). Thirty-five women underwent elective terminations, three following the identification of fetal abnormalities. At least 18 pregnancies resulted in miscarriage. The remainder of the births resulted in infants with congenital abnormalities (n=9, one still birth). In total, 12 pregnancies resulted in infants with fetal abnormalities (9.6 percent) and of those, there were eight live births, one still birth and three terminations (mentioned above). Some of the abnormalities in the infants were similar, including exomphalos (umbilical hernia), renal agenesis (undeveloped kidney), and hemivertebrae (underdeveloped spine). The stillborn child suffered from meningocoele (cerebral hernia).

The study showed that a significant proportion of pregnancies exposed to imatinib result in a normal outcome and a healthy infant. The miscarriage rate in the study was 14.4 percent, which is within the expected range for the general population. However, the fact that some of the abnormalities seen in the 12 infants were similar to results found in early animal studies with imatinib suggests the possibility of an imatinib-induced effect.

"Our study suggests that a concern about conceiving a child while taking imatinib is justified and that patients should be advised to avoid conception while on treatment," said Dr. Seonaid Pye, of the Department of Hematology, Imperial College of London and lead author of the study. "In those patients who do become pregnant, balancing the risk of the fetus from taking therapy to the risk of the mother from interrupting therapy will be an individual decision."

The majority of women in the study were being treated for CML at the time of conception; just four cases were exposed after the first trimester. The dose and the exact duration of imatinib therapy are unknown for most cases, with insufficient information to assess a dose-related relationship. There were no reports of maternal exposure to alcohol, drugs, or tobacco addiction during pregnancy, and none of the mothers had received other high-dose chemotherapy prior to their pregnancies.

"The risks and benefits to an expectant woman fighting cancer and her fetus are challenging and must be evaluated on an individual basis with careful counseling," said Dr. Pye. "Ultimately, the treatment of CML during pregnancy clearly remains a considerable clinical challenge."

The American Society of Hematology (http://www.hematology.org) is the world's largest professional society concerned with the causes and treatment of blood disorders. Its mission is to further the understanding, diagnosis, treatment, and prevention of disorders affecting blood, bone marrow, and the immunologic, hemostatic, and vascular systems, by promoting research, clinical care, education, training, and advocacy in hematology.

Blood, the official journal of the American Society of Hematology, is the most cited peer-reviewed publication in the field. Blood is issued to Society members and other subscribers twice per month, available in print and online at http://www.bloodjournal.org.


'/>"/>
SOURCE American Society of Hematology
Copyright©2008 PR Newswire.
All rights reserved

Related medicine technology :

1. Xenomics Announces Implementation of its First Diagnostic Test for Acute Myeloid Leukemia Into Clinical Practice
2. CuraGen and TopoTarget Initiate Phase I/II Clinical Trial of Belinostat (PXD101) Combination Therapy for Acute Myeloid Leukemia
3. St. Jude Discovers Factors That Accelerate Resistance to Gleevec(TM) Targeted Therapy in Lymphoblastic Leukemia
4. September is Leukemia, Lymphoma and Myeloma Awareness Month
5. The Leukemia & Lymphoma Society is Encouraged by Promising News for Myeloma Patients
6. The Leukemia & Lymphoma Society and Cleveland Clinic Taussig Cancer Institute Announce Groundbreaking Partnership to Accelerate Drug Approvals
7. Leukemia Drug Proves Safe and Effective Over the Long Term
8. TREANDA Significantly Improves Clinical Outcomes in Patients with Chronic Lymphocytic Leukemia Compared to Chlorambucil
9. Preclinical Studies Show Promise for Novel Antibody Therapy to Treat Acute Myeloid Leukemia (AML)
10. Celator(R) Pharmaceuticals Reports CPX-351 Shows Anti-Cancer Activity in Leukemia Patients
11. Data Presented at 2007 ASH Meeting Demonstrate Activity of Forodesine HCl as a Single Agent or in Combination With Bendamustine in Certain Types of Leukemia and Lymphoma
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/26/2016)... June 26, 2016 One of Australia,s ... the formation of a new biotechnology company, Noxopharm Limited [ABN 50 ... an IPO and to list on the ASX. Noxopharm ... ready to enter a Phase 1 clinical study later this year. ... address one of the biggest problems facing cancer patients - the ...
(Date:6/26/2016)... June 27, 2016 Jazz Pharmaceuticals plc (Nasdaq: ... under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as ... Celator Pharmaceuticals, Inc. ("Celator"; Nasdaq: CPXX ) ... Daylight Time). As previously announced on May ... definitive merger agreement under which Jazz Pharmaceuticals has commenced ...
(Date:6/26/2016)... June 27, 2016  VMS Rehab Systems, Inc. ( ... take whatever measures required to build a strong and ... is currently listed on the OTC Markets-pink current trading ... and CEO, "We are seeing an anomaly in market ... not only by the Company, but shareholders and market ...
Breaking Medicine Technology:
(Date:6/26/2016)... , ... June 26, 2016 , ... On June 10-11, ... of the 2016 Cereal Festival and World’s Longest Breakfast Table in Battle Creek, MI, ... the city’s history as home to some of the world’s leading providers of cereal ...
(Date:6/26/2016)... ... ... Kasmer, a legally blind and certified personal trainer is helping to develop a weight loss ... plans to fix the two major problems leading the fitness industry today:, ... , They don’t eliminate all the reasons people quit their exercise program ...
(Date:6/25/2016)... Austin, TX (PRWEB) , ... June 25, 2016 , ... ... Fellow of the American College of Mohs Surgery and to Dr. Russell Peckham for ... popular and highly effective treatment for skin cancer. The selective fellowship in Mohs Micrographic ...
(Date:6/25/2016)... ... June 25, 2016 , ... First Choice Emergency ... named Dr. Sesan Ogunleye, as the Medical Director of its new Mesquite-Samuell Farm facility. ... Director of our new Mesquite location,” said Dr. James M. Muzzarelli, Executive Medical Director ...
(Date:6/25/2016)... ... 25, 2016 , ... On Friday, June 10, Van Mitchell, Secretary of the ... to iHire in recognition of their exemplary accomplishments in worksite health promotion. , The ... Health & Wellness Symposium at the BWI Marriott in Linthicum Heights. iHire was one ...
Breaking Medicine News(10 mins):