Feb 2 2010
ZymoGenetics, Inc. (NASDAQ:ZGEN), today announced the publication of
pooled safety and immunogenicity observations from eight clinical trials
of RECOTHROM in the February issue of the Journal of the American
College of Surgeons. The authors concluded that RECOTHROM is a
well-tolerated topical hemostatic agent in numerous surgical settings
and has a low rate of anti-product antibody formation. In the pooled
data from all trials, less than one percent of treated patients
developed product-specific antibodies. None of the antibodies
neutralized native coagulation proteins.
“These pooled safety data are significant, as they provide a robust
clinical trial data set for a topical hemostat”
“These pooled safety data are significant, as they provide a robust
clinical trial data set for a topical hemostat,” said Fred Weaver, MD,
FACS, a study author and Professor of Surgery at USC CardioVascular
Thoracic Institute, USC University Hospital, Keck School of Medicine,
University of Southern California, Los Angeles, CA. “The adverse events
observed were consistent with those expected in the surgical populations
studied, and immune response to RECOTHROM was consistently low, with no
development of antibodies that neutralized native human thrombin.”
The eight clinical trials (one Phase 1 trial, five Phase 2 trials, one
randomized, double-blind Phase 3 trial, and one open-label Phase 3b
trial) included 583 patients, ranging in age from 12 through 89 years,
with no hypersensitivity to thrombin or other coagulation factors.
Surgical procedures included spinal (33%), hepatic resection (14%),
peripheral arterial bypass (23%), arteriovenous graft formation for
hemodialysis access (18%), and skin graft after burn wound excision
(12%).
In each of the studies, RECOTHROM was administered during a single
surgical procedure; adverse events as well as clinical hematology and
coagulation laboratory parameters were monitored through post-operative
(post-op) day 29. Patients were tested for anti-RECOTHROM antibodies at
baseline and at the post-op day 29 assessment.
Adverse events reported for ≥ 10% of RECOTHROM-treated patients included
incision site pain, procedural pain, nausea, constipation, pyrexia,
anemia, insomnia, vomiting, and pruritis. These adverse events are
commonly reported in patients undergoing surgery, and variation in the
observed incidence of these events across surgery types was consistent
with the specific type of procedure and surgical patient population.
After treatment with RECOTHROM, less than one percent of patients for
whom complete immunogenicity observations were available developed
anti-RECOTHROM antibodies (5 of 552 patients or 0.9%). The antibodies
identified did not neutralize the activity of native human thrombin.
SOURCE ZymoGenetics