CuraGen Corporation
(Nasdaq: CRGN) and TopoTarget A/S (Copenhagen Stock Exchange: TOPO)
announced today the initiation of patient dosing in a Phase II clinical
trial evaluating the antitumor activity of intravenous PXD101, a small
molecule histone deacetylase (HDAC) inhibitor, for the treatment of ovarian
cancer. This trial is being sponsored by the National Cancer Institute
(NCI) under a Clinical Trials Agreement with CuraGen for PXD101.
The Phase II trial is an open-label study being led by Dr. Amit Oza at
Princess Margaret Hospital in Toronto, Canada. Patients with either
advanced platinum resistant ovarian tumors or micropapillary/borderline low
malignant potential (LMP) ovarian carcinoma may be enrolled for treatment
with PXD101. Patients may have received no more than three prior lines of
therapy. Upon enrollment, patients will receive intravenous PXD101 daily
for five days in three week cycles until disease progression. The primary
endpoint for the study is the determination of objective disease response,
as evaluated by the RECIST criteria. Secondary endpoints include evaluation
of safety and tolerability of PXD101, stable disease rates, duration of
response, progression-free survival, as well as median and overall
survival. Up to 62 patients at sites across Canada and the United States
will be enrolled into the study.
“Hypoacetylation appears to play an important role in silencing the
expression of genes, including tumor supressors that regulate cell
survival, proliferation, and differentiation,” commented Dr. Oza. “The
ability to reactivate tumor suppressor gene(s), together with the new
published preclinical data, provides an excellent rationale to evaluate the
role of the histone deacetylase inhibitor, PXD101 in treating two different
populations of patients with ovarian cancer, those with advanced refractory
tumors and those patients with micropapillary and borderline, or low
malignant potential, tumors.”
“This NCI-sponsored trial evaluating PXD101 monotherapy complements our
ongoing Phase Ib/II clinical trial, which is studying intravenous PXD101 in
combination with paclitaxel and carboplatin for the treatment of advanced
ovarian cancer. Both of these trials will generate data that will allow us
to better understand the role of PXD101 in the treatment of this disease,
and provide results to enable a decision regarding registrational
development for ovarian cancer,” stated Dr. Timothy Shannon, Executive Vice
President of Research and Development and Chief Medical Officer at CuraGen
Corporation.
Correlative pharmacodynamic studies will also be conducted to evaluate
the potential inhibition of HDACs in ovarian tumor cells from patients
enrolled in this trial. Evaluation of the genes regulating proliferation
and apoptosis (programmed cell death), as well as acetylation of histone
and non-histone proteins, will be performed.
In an article published in the August 2006 issue of Molecular Cancer
Therapeutics, CuraGen and TopoTarget scientists also reported new
preclinical data for PXD101 that is relevant to ovarian cancer. Data in the
study demonstrates that PXD101 has growth-inhibitory activity as mono- or
combo therapy on multidrug resistant ovarian cancer lines, as well as on
primary clinical cancer specimens grown in culture. Furthermore, PXD101 was
found to have anti-tumor activity in animal models of ovarian cancer.
About Ovarian Cancer
Ovarian cancer causes a significant burden of disease accounting for 5%
of all cancer deaths and is the fifth leading cause of death in women in
Canada, the U.S., and Europe. Despite the efficacy of the combination of
platinum/paclitaxel chemotherapy in advanced ovarian carcinoma, more than
75% of patients with stage III/IV disease ultimately relapse and die from
their disease. Recurrent ovarian carcinoma is incurable and is treated with
platinum-based therapy when the treatment free interval following initial
therapy is longer than 6 months. Patients who have resistant ovarian
cancer, whose disease does not respond to first line carboplatin and
paclitaxel have a dire prognosis and the likelihood of response to further
chemotherapy is very low (approximately 10%). There is therefore a need to
develop new agents for the treatment of patients with this malignancy.
About PXD101
PXD101 is a promising small molecule HDAC inhibitor being investigated
for its role in the treatment of a wide range of solid and hematologic
malignancies either as a single-agent, or in combination with other active
anti-cancer agents, including 5-fluorouracil (5-FU), carboplatin,
paclitaxel, cis-retinoic acid, azacitidine and Velcade(R) (bortezomib) for
Injection. HDAC inhibitors represent a new mechanistic class of anti-cancer
therapeutics that target HDAC enzymes and have been shown to: arrest growth
of cancer cells (including drug resistant subtypes); induce apoptosis, or
programmed cell death; promote differentiation; inhibit angiogenesis; and
sensitize cancer cells to overcome drug resistance when used in combination
with other anti-cancer agents.
PXD101 is currently being evaluated in multiple clinical trials as a
potential treatment for multiple myeloma, T- and B-cell lymphomas, AML,
mesothelioma, liver, colorectal, ovarian cancers, either alone or in
combination with anti-cancer therapies. In August 2004, CuraGen signed a
Clinical Trials Agreement with the NCI under which the NCI is sponsoring
several clinical trials to investigate PXD101 for the treatment of various
cancers, both as a single-agent and in combination chemotherapy regimens.
In May 2005, TopoTarget announced the signing of a Cooperative Research and
Development Agreement (CRADA) with the NCI to conduct preclinical and
nonclinical studies on PXD101 in order to better understand its anti-tumor
activity and to provide supporting information for clinical trials.
About CuraGen
CuraGen Corporation (Nasdaq: CRGN) is a biopharmaceutical company
developing diverse approaches, including novel protein, antibody, and small
molecule therapeutics, that aim to offer hope for patients with cancer,
inflammatory diseases, and diabetes. CuraGen’s strategic alliances have
resulted in a deep pipeline of potential therapeutics that is being
developed by the Company’s experienced research and development teams. By
leveraging the drug development strengths cultivated over the years,
CuraGen expects to make a difference in the lives of patients by bringing
forward promising therapeutics that address unmet medical needs. To further
capitalize on CuraGen’s extensive research and development expertise,
CuraGen founded a majority-owned subsidiary, 454 Life Sciences, which has
developed and is commercializing advanced technologies for the sequencing
of DNA. CuraGen and 454 Life Sciences are headquartered in Branford,
Connecticut. For additional information on the companies please visit
curagen and 454lifesciences.
About TopoTarget
TopoTarget (CSE: TOPO) is a biopharmaceutical company, headquartered in
Denmark and with subsidiaries in the UK and Germany, dedicated to finding
“Answers for Cancer” and developing improved cancer therapies. TopoTarget
is founded and run by clinical cancer specialists and combines years of
hands-on clinical experience with in-depth understanding of the molecular
mechanisms of cancer. Focus lies on highly predictive cancer models and key
cancer enzyme regulators (mainly HDAC, mTOR, and topoisomerase II
inhibitors) and a strong development foundation has been built. TopoTarget
has a broad portfolio of small molecule preclinical drug candidates and
seven drugs are in clinical development, including both novel anti-cancer
therapeutics and new cancer indications for existing drugs. Savene(TM) is
TopoTarget’s first product on the market. In addition to organic growth,
TopoTarget consistently looks for opportunities to strengthen and expand
its activities through acquisitions and in-licensing. For more information,
please refer to topotarget.
Safe Harbor
This press release contains forward-looking statements that are subject
to certain risks and uncertainties. These forward-looking statements
include statements regarding future expectations, beliefs, intentions,
goals, strategies, plans or prospects regarding the future, including
statements about the expected benefits of PXD101, and our ability to
generate data that will allow us to better understand the role of PXD101 in
the treatment of ovarian cancer. We caution investors that there can be no
assurance that actual results or business conditions will not differ
materially from those projected or suggested in such forward-looking
statements as a result of various factors, including, but not limited to,
the following: the risk that any one or more of the PXD101 or any other
CuraGen drug development program will not proceed as planned for technical,
scientific or commercial reasons or due to patient enrollment issues or
based on new information from nonclinical or clinical studies or from other
sources; the success of competing products and technologies; technological
uncertainty and product development risks; uncertainty of additional
funding; CuraGen’s history of incurring losses and the uncertainty of
achieving profitability; CuraGen’s stage of development as a
biopharmaceutical company; government regulation; patent infringement
claims against CuraGen’s products, processes and technologies; the ability
to protect CuraGen’s patents and proprietary rights; uncertainties relating
to commercialization rights; and product liability exposure. Please refer
to CuraGen’s Annual and Quarterly Reports on Forms 10-K and 10-Q for a
complete description of these risks. CuraGen disclaims any intention or
obligation to update or revise any forward-looking statements, whether as a
result of new information, future events, or otherwise, unless required by
law.
CuraGen Corporation
curagen
topotarget Continue reading →