HOUSTON and VANCOUVER, BC, Oct. 24,
2020 /CNW/ - ESSA Pharma Inc. (Nasdaq: EPIX) (TSXV:
EPI), a clinical-stage pharmaceutical company focused on developing
novel therapies for the treatment of prostate cancer, today
presented new preclinical data on ESSA's clinical candidate,
EPI-7386, at the 32nd EORTC-NCI-AACR Annual Symposium on
Molecular Targets and Cancer Therapeutics ("ENA").
In an oral poster presentation titled, "The pre-clinical
characterization of the N-terminal domain androgen receptor
inhibitor, EPI-7386, for the treatment of prostate cancer", was
published on Saturday, October
24th.
The studies highlight new information about EPI-7386
including:
- In an in vitro cellular thermal shift assay (CETSA),
EPI-7386 was shown to physically interact with the both the
full-length and the splice variant (AR-V7) form of the androgen
receptor ("AR").
- In an in vitro full-length AR-driven cellular model
(LNCaP), RNAseq data was analyzed by pathway enrichment analysis.
EPI-7386 demonstrates largely similar modulation of AR-regulated
genes compared to enzalutamide, but with additional unique
elements.
- EPI-7386 exhibits superior activity to enzalutamide in the
AR-V7-driven cellular models LNCaP95 and 22Rv1 by modulating
AR-driven gene expression with or without the addition of an
external androgen.
"Previously, we presented in vitro data demonstrating
that EPI-7386 binds to the full-length androgen receptor and can
inhibit the transcription of AR-regulated genes. These new data
demonstrate that EPI-7386 can also physically interact with the
splice variant form, AR-V7, of the androgen receptor and inhibit
its activity. The importance of this interaction with AR-V7 is seen
through the superior transcriptional inhibition of AR-regulated
genes by EPI-7386 compared to enzalutamide in the AR-V7-driven cell
models LNCaP95 and 22Rv1. Together, these data provide important
new insights into mechanistic aspects related to the binding and
utility of EPI-7386 against AR-V7 splice-variant driven prostate
cancer models. The data further strengthen the rationale for
studying EPI-7386 in men with prostate cancer resistant to current
anti-androgens." said Dr. David R.
Parkinson, President and Chief Executive
Officer.
About ESSA Pharma Inc.
ESSA is a clinical-stage
pharmaceutical company focused on developing novel and proprietary
therapies for the treatment of castration-resistant prostate cancer
in patients whose disease is progressing despite treatment with
current therapies. ESSA's proprietary "aniten" compounds bind to
the N-terminal domain of the androgen receptor ("AR"), inhibiting
AR driven transcription and the AR signaling pathway in a unique
manner which bypasses the drug resistance mechanisms associated
with current anti-androgens. The Company is currently conducting a
phase 1 study of EPI-7386 in patients with metastatic
castration-resistant prostate cancer ("mCRPC") who are failing
current standard-of-care therapies. For more information, please
visit www.essapharma.com and follow us on Twitter under
@ESSAPharma.
About Prostate Cancer
Prostate cancer is the
second-most commonly diagnosed cancer among men and the fifth most
common cause of male cancer death worldwide (Globocan, 2018).
Adenocarcinoma of the prostate is dependent on androgen for tumor
progression and depleting or blocking androgen action has been a
mainstay of hormonal treatment for over six decades. Although
tumors are often initially sensitive to medical or surgical
therapies that decrease levels of testosterone, disease progression
despite castrate levels of testosterone generally represents a
transition to the lethal variant of the disease, mCRPC, and most
patients ultimately succumb to the illness. The treatment of mCRPC
patients has evolved rapidly over the past five years. Despite
these advances, additional treatment options are needed to improve
clinical outcomes in patients, particularly those who fail existing
treatments including abiraterone or enzalutamide, or those who have
contraindications to receive those drugs. Over time, patients with
mCRPC generally experience continued disease progression, worsening
pain, leading to substantial morbidity and limited survival rates.
In both in vitro and in vivo animal studies, ESSA's novel approach
to blocking the androgen pathway has been shown to be effective in
blocking tumor growth when current therapies are no longer
effective.
Forward-Looking Statement Disclaimer
This release
contains certain information which, as presented, constitutes
"forward-looking information" within the meaning of the Private
Securities Litigation Reform Act of 1995 and/or applicable Canadian
securities laws. Forward-looking information involves statements
that relate to future events and often addresses expected future
business and financial performance, containing words such as
"anticipate", "believe", "plan", "estimate", "expect", and
"intend", statements that an action or event "may", "might",
"could", "should", or "will" be taken or occur, or other similar
expressions and includes, but is not limited to, the results of
preclinical data on EPI-7386 including the potential utility of
EPI-7386 against AR-V7 splice-variant driven prostate cancer
models.
Forward-looking statements and information are subject to
various known and unknown risks and uncertainties, many of which
are beyond the ability of ESSA to control or predict, and which may
cause ESSA's actual results, performance or achievements to be
materially different from those expressed or implied thereby. Such
statements reflect ESSA's current views with respect to future
events, are subject to risks and uncertainties and are necessarily
based upon a number of estimates and assumptions that, while
considered reasonable by ESSA as of the date of such statements,
are inherently subject to significant medical, scientific,
business, economic, competitive, political and social uncertainties
and contingencies. In making forward looking statements, ESSA may
make various material assumptions, including but not limited to (i)
the accuracy of ESSA's financial projections; (ii) obtaining
positive results of clinical trials; (iii) obtaining necessary
regulatory approvals; and (iv) general business, market and
economic conditions.
Forward-looking information is developed based on assumptions
about such risks, uncertainties and other factors set out herein
and in ESSA's Annual Report on Form 20-F dated December 19, 2019 under the heading "Risk
Factors", a copy of which is available on ESSA's profile on the
SEDAR website at www.sedar.com, ESSA's profile on EDGAR at
www.sec.gov, and as otherwise disclosed from time to time on ESSA's
SEDAR profile. Forward-looking statements are made based on
management's beliefs, estimates and opinions on the date that
statements are made and ESSA undertakes no obligation to update
forward-looking statements if these beliefs, estimates and opinions
or other circumstances should change, except as may be required by
applicable Canadian and United
States securities laws. Readers are cautioned against
attributing undue certainty to forward-looking statements.
Neither TSX Venture Exchange nor its Regulation Services
Provider (as that term is defined in the policies of the TSX
Venture Exchange) accepts responsibility for the adequacy or
accuracy of this release.
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SOURCE ESSA Pharma Inc