On May 10, 2022 ESSA Pharma Inc. ("ESSA", or the "Company") (NASDAQ: EPIX), a clinical-stage pharmaceutical company focused on developing novel therapies for the treatment of prostate cancer, reported financial results for the fiscal second quarter ended March 31, 2022 (Press release, ESSA, MAY 10, 2022, View Source [SID1234614152]). All references to "$" in this release refer to United States dollars, unless otherwise indicated.
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"During this past quarter, we continued to dose patients in our Phase 1 monotherapy study of EPI-7386, a first-in-class N-terminal domain ("NTD") androgen receptor inhibitor, in patients with metastatic castration-resistant prostate cancer ("mCRPC") whose tumors have progressed on current standard-of-care therapies," stated David Parkinson, M.D., President and CEO of ESSA. "We expect to present a clinical update on the monotherapy trial in the first half of 2022. In addition, several clinical collaborations are underway investigating the potential clinical benefit of EPI-7386 in combination with approved second-generation antiandrogens, including the Company-sponsored Phase 1/2 study of EPI-7386 in combination with enzalutamide in mCRPC patients who have not yet been treated with second-generation antiandrogen therapies."
Clinical and Corporate Highlights
EPI-7386 Monotherapy
The Company is currently dosing patients in the Phase 1a dose escalation study evaluating EPI-7386 as a monotherapy in patients with mCRPC. Patients are being dosed at 1,000 mg QD, 800 mg/day administered as 400 mg twice daily (BID) and 1200 mg/day administered as 600 mg BID.
The Company expects to provide a clinical update on the Phase 1a dose escalation study in the first half of 2022.
The Phase 1b study is expected to commence in the second half of 2022 and will confirm a recommended Phase 2 dose ("RP2D").
EPI-7386 Clinical Collaborations
In January 2022, the Company dosed the first patient in the Company-sponsored Phase 1/2 study of EPI-7386 in combination with Astellas Pharma Inc.’s and Pfizer Inc.’s enzalutamide in patients with mCRPC who have not been treated with second-generation antiandrogen therapies.
Janssen Research and Development LLC has initiated a Phase 1/2 trial of EPI-7386 in combination with apalutamide or abiraterone acetate plus prednisone in earlier line mCRPC patients.
The Bayer-led Phase 1/2 trial will evaluate EPI-7386 in combination with darolutamide in earlier line mCRPC patients.
Preclinical
On April 10, 2022 at the 2022 American Association for Cancer Research (AACR) (Free AACR Whitepaper) Annual Meeting, the Company presented preclinical data for its first generation of androgen receptor (AR) ANITen bAsed Chimera (ANITAC) (NTD) degraders showing orally bioavailable ANITAC degraders can eliminate full length, mutant and splice variant forms of AR that are expressed in castration-resistant prostate cancer (CRPC) patients, and that ANITAC degraders inhibit AR-dependent transcription and reduce viability of AR-dependent prostate cancer cells.
Summary Financial Results
Net Loss. ESSA recorded a net loss of $10.9 million ($0.25 loss per common share based on 44,030,480 weighted average common shares outstanding) for the quarter ended March 31, 2022, compared to a net loss of $13.0 million ($0.36 loss per common share based on 36,484,041 weighted average common shares outstanding) for the quarter ended March 31, 2021. For the quarter ended March 31, 2022, this included non-cash share-based payments of $1.9 million compared to $2.7 million for the comparable period in 2021, recognized for stock options granted and vesting.
Research and Development ("R&D") expenditures. R&D expenditures for the quarter ended March 31, 2022 were $7.6 million compared to $7.3 million for the quarter ended March 31, 2021 and included non-cash costs related to share-based payments ($1.1 million for the quarter ended March 31, 2022 compared to $791,969 for the quarter ended March 31, 2021). The increase in R&D expenditures for the first fiscal quarter ended March 31, 2022 was primarily related to clinical data analysis associated with the Phase 1a clinical study, as well as increased expenses related to intellectual property and salaries, as well as the non-cash share-based expenses.
General and administration ("G&A") expenditures. G&A expenditures for the quarter ended March 31, 2022 were $3.8 million compared to $4.6 million for the quarter ended March 31, 2021 and included non-cash costs related to share-based payments of $741,494 for the quarter ended March 31, 2022 compared to $1.9 million for the comparable period in 2021. The increased expenditure is the result of increased professional fees related to higher salaries and benefits, as well as the non-cash share-based payments.
Liquidity and Outstanding Share Capital
At March 31, 2022, the Company had available cash reserves and short-term investments of $181.0 million reflecting the gross proceeds of the February 2021 financing of approximately $150.0 million and July 2020 financing of $48.9 million, less operating expenses in the intervening period. The Company’s cash position is expected to be sufficient to fund current and planned operations through 2024.
As of March 31, 2022, the Company had 44,059,700 common shares issued and outstanding.
In addition, as of March 31, 2022 there were 3,234,750 common shares issuable upon the exercise of warrants and broker warrants. This includes 2,920,000 prefunded warrants at an exercise price of $0.0001, and 314,750 warrants at a weighted average exercise price of $49.69. There were 6,795,736 common shares issuable upon the exercise of outstanding stock options at a weighted-average exercise price of $5.33 per common share.
About EPI-7386
EPI-7386 is an investigational, highly-selective, oral, small molecule inhibitor of the N-terminal domain of the androgen receptor. EPI-7386 is currently being studied in a Phase 1 clinical trial (NCT04421222) in men with mCRPC whose tumors have progressed on current standard-of-care therapies. The Phase 1 clinical trial of EPI-7386 began in calendar Q3 of 2020 following FDA allowance of ESSA’s Investigational New Drug application and Health Canada acceptance. EPI-7386 is also being studied in earlier line mCRPC patients in Phase 1/2 trials in combination with enzalutamide, apalutamide and abiraterone acetate with prednisone. The U.S. FDA has granted Fast Track designation to EPI-7386 for the treatment of adult male patients with mCRPC resistant to standard-of-care treatment. ESSA retains all rights to EPI-7386 worldwide.