Thursday, March 27, 2008

Heart Failure Is Rare Among Leukemia Patients On Imatinib




The CALAX screw be nearly foreign to immobilize a graft in ACL
reconstruction. Over the flight path of the subsequent 12 months,
the screw is resorbed by the thing, and multiple in the screw
widen the inbred drive of bone establishment as an
alternative. The new bone riddle the tunnel where on largeness
soil a surgeon placed the graft, and promotes the ossification of
the graft.



"The grades be consequently dignified in favor of Transdermis(TM)
Scar Therapy, we truly concluded the pilot study untimely," said
Dr. Chao, "and we straight away initiate a longer-term
Institutional Review Board (IRB) principle study." The IRB
approved study, which is the gold ingot standard of
university-based clinical research, have already be approved and
is now on the go, Dr. Chao said.



"Imatinib excess a previous the worst drug, but monitor patients
and knowing their medical histories be always expressive," say
Jorge Cortes, M.D., top poet of the report and professor in M. D.



Anderson's Department of Leukemia. "There be no developed
inevitability for regime cardiac-specific monitoring of all
patients taking imatinib. However, those beside stern cardiac
history need to be keenly monitor. Patients who draw your sock
aloft symptoms of heart
failure
should be evaluate accommodatingly and treat with
ribbon treatment." Of the 22 patients found to have
cardiovascular conditions, 11 were competent to disseminate by
imatinib for their leukemia after dose adjustment and government
of the heart
failure
symptoms. The standard of nurture treatment entangle
the apply of beta blockers and angiotensin convert enzyme
inhibitors or angiotensin receptor blockers, report exploration
co-author Jean-Bernard Durand, M.D., an assistant professor in M.
D. Anderson's Department of Cardiology. Both classes of drugs are
voted for by the FDA for treatment of heart failure and
recommended by the Heart Failure Society of America.



The troop also found the amount of congestive heart failure among
patients acceptance imatinib to be comparable to the looked-for
incidence in the original population as reported by the
Framingham Heart Study, a defining long-term study of
cardiovascular disease in the United States.



Imatinib, prearranged by its heap disrespect on baptize
Gleevec(tm) and trade by Novartis Pharmaceuticals, is approved by
the U.S. Food and Drug Administration for the treatment of
incurable myelogenous leukemia (CML), Philadelphia-chromosome
influential acute lymphoblastic leukemia d(ALL) and
gastrointestinal stromal tumor, a pink thick tumor cancer.



Imatinib is a targeted therapy that inhibit two appendage of a
federation of enzymes call tyrosine kinases, which relay credit
and persistence sign in cell. The drug also block a hybrid
tyrosine kinase known to cause CML and Philadelphia-positive ALL.



Before the drug be developed, just about no more than about to a
degree of CML patients survive for five years after diagnosis.
The five-year survival rate of patients taking imatinib is 95
percent.



In a removed dissertation unpunctually final year, a research
team lead by scientists at the University of Pennsylvania
reported that imatinib may be cardiotoxic in mammals. They found
stress-induced impair to the mitochondria - the powerhouse organs
in cells - in cardiac muscle of mice given the drug. They also
implicated inhibition of Abl, one of the tyrosine kinases
targeted by imatinib, as the molecular apparatus that cause the
damage.



Additionally, 10 patients at M. D. Anderson who developed
congestive heart failure after revelation to imatinib were name
in the paper. The paper make not charge the frequency of heart
failure among patients taking imatinib or the sheet up to chance
factor enmeshed.



Durand, who was also a co-author on the ahead of time paper, says
research continue to address how tyrosine kinase inhibition could
affect cardiovascular risk. "We continue to run through closely
with oncologists to identify hasty biochemical marker which may
presage patients at risk and implement medical therapy earlier to
extend the glory of tyrosine kinase inhibitors in CML patients,"
Durand says.



Co-authors of the Blood paper with Cortes and Durand are crack
author Ehab Atallah, M.D., and Hagop Kantarjian, M.D., stool of
the Department of Leukemia at M. D. Anderson.



Kantarjian and Cortes have received research funds from Novartis
Pharmaceuticals. M. D. Anderson was the head institution in
clinical trials that prove the efficacy of imatinib for CML.



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