ESSA Pharma Inc. Receives Health Canada Approval to Commence Clinical Development for EPI-506

HOUSTON, TX and VANCOUVER, BC, Nov. 5, 2015 /CNW/ - ESSA Pharma Inc. ("ESSA" or the "Company") (TSX: EPI; NASDAQ: EPIX) announced today that the Health Protection Branch ("HPB") of Health Canada has issued a 'no objection letter' for the Clinical Trial Authorization application that ESSA has submitted.  The HPB letter will allow ESSA to include Canadian sites in its ongoing Phase 1/2 clinical study of its novel agent, EPI-506, for the treatment of metastatic castration-resistant prostate cancer ("CRPC") in patients who have failed current therapies.    Enrolment in the clinical trial in Canada is expected to commence in the next few weeks.


The Company announced in September that the U.S. Food and Drug Administration had approved its Investigational New Drug application to initiate a Phase 1/2 clinical study in the United States where site initiation and patient enrollment is now ongoing.

"We are excited to initiate this clinical trial with EPI-506 at sites in Canada." said Dr. Marianne Sadar, ESSA's Chief Scientific Officer.  "The novel mechanism of action of EPI-506 holds potential to successfully treat prostate cancer patients who have failed existing therapies."

In its planned Phase 1/2 clinical trial, ESSA intends to demonstrate the safety, tolerability, maximum tolerated-dose, pharmacokinetics, and efficacy of EPI-506 in treating prostate cancer patients who have failed abiraterone or enzalutamide or both, the current standard-of-care drugs in metastatic CRPC.  The trial is expected to enrol approximately 150 subjects.

About ESSA Pharma Inc.
ESSA Pharma is a development-stage pharmaceutical company focused on developing novel and proprietary therapies for the treatment of castration resistant prostate cancer ("CRPC") in patients whose disease is progressing despite treatment with current therapies. ESSA believes that its product candidate, EPI-506, can significantly expand the interval of time in which patients suffering from CRPC can benefit from hormone-based therapies. EPI-506 acts by disrupting the androgen receptor ("AR") signaling pathway, which is the primary pathway that drives prostate cancer growth. We have shown that EPI-002, the primary metabolite of EPI-506, prevents AR activation by binding selectively to the N-terminal domain ("NTD") of the AR. A functional NTD is essential for activation of the AR. Blocking the NTD prevents activation of the AR by all of the three known mechanisms of activation. In pre-clinical studies, blocking the NTD has demonstrated the capability to overcome the known AR-dependent mechanisms of CRPC. ESSA was founded in 2009 and is located in Vancouver, British Columbia and Houston, Texas.

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, 2012). 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 (for example, Androgen deprivation therapy ("ADT"), 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 that 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 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 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, statements about the Company's upcoming Phase 1/2 clinical trial; and the implementation of the Company's business model and strategic plans.

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) obtaining positive results of clinical trials; (ii) obtaining regulatory approvals; and (iii) 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 short form base shelf prospectus dated September 18, 2015 under the heading "Risk Factors", a copy of which is available on ESSA's profile at the SEDAR website at, 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 securities laws. Readers are cautioned against attributing undue certainty to forward-looking statements.


Image with caption: "ESSA Pharma Inc. (CNW Group/ESSA Pharma Inc)". Image available at:

For further information: Bob Rieder, CEO, ESSA Pharma Inc., T: 778-331-0962, 832-831-5958, E:; Frank Perabo, Chief Medical Officer, T: 832-831-5958

Custom Packages

Browse our custom packages or build your own to meet your unique communications needs.

Start today.

CNW Membership

Fill out a CNW membership form or contact us at 1 (877) 269-7890

Learn about CNW services

Request more information about CNW products and services or call us at 1 (877) 269-7890