SAN DIEGO and VANCOUVER, British Columbia, Aug. 29, 2018 /PRNewswire/ -- Sophiris Bio Inc. (NASDAQ: SPHS) (the "Company" or "Sophiris"), a
biopharmaceutical company studying topsalysin (PRX302), a first-in-class, pore-forming protein, in late-stage clinical trials for
the treatment of patients with urological diseases, today announced the conclusion of the ongoing investigation into the
previously reported death of a patient in the Company's Phase 2b trial for the treatment of
localized prostate cancer is unlikely to be related to either topsalysin or the procedure. The regulatory authorities in
the United States and the United Kingdom where the study is
being conducted have been notified.
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Following a comprehensive review of the recently received autopsy report, together with hospital records and the negative
serology results for acute hypersensitivity, the Investigator and Company believe that the cause of death is consistent with the
autopsy finding of Sudden Cardiac Death (SCD) probably due to an arrhythmia. The autopsy found that the patient had multiple risk
factors for SCD. The investigator and the Company concur that the event is unlikely related to topsalysin or the procedure.
"As we have previously reported, over 450 patients have received topsalysin at various doses. Topsalysin continues to appear
to be well-tolerated with no new safety signals reported," said Randall E. Woods, President and
Chief Executive Officer of Sophiris. "We are very encouraged with the results from the single administration of topsalysin in our
Phase 2b study that were reported in June 2018. We continue to plan
and move forward with a potential Phase 3 study design based on the response rates and safety profile we have observed to date.
We look forward to reporting the complete efficacy and safety data from the Phase 2b study by the
end of the year which will include the biopsy and safety data from the 10 patients who received a second administration of
topsalysin."
About Localized Prostate Cancer
Prostate cancer is the second most common form of cancer in men in the US with an estimated 161,000 new cases in 2017.
Approximately 80 percent of patients in the US are diagnosed with localized disease. Research has shown that patients with early,
localized disease have a low likelihood of the cancer spreading beyond the confines of the prostate; however, many men with
clinically significant localized disease choose to undergo radical treatment. Radical therapies include surgery to remove the
entire prostate and/or radiation. Potential toxicities from radical treatments can be significant and permanent and include
erectile dysfunction, urinary incontinence, and rectal toxicity.
About Topsalysin
Topsalysin (PRX302), an innovative, "First-in-Class" transmembrane pore-forming protein, was genetically modified to be
activated only by enzymatically-active PSA, which is produced in large quantities within the prostate of men with prostate
cancer. The targeted focal treatment of prostate cancer is in line with current treatment trends for solid tumors such as breast
and liver, where the goal is to remove the tumor and preserve as much of the organ and organ function as possible.
Topsalysin has the potential to provide a targeted focal therapy for the ablation of localized prostate cancer lesions while
potentially avoiding many of the complications and side effects associated with whole gland radical treatments. The increasing
use of multiparametric magnetic resonance imaging (mpMRI) and advances in software to co-register previously obtained mpMRI
images with real-time three-dimensional ultrasound images enables urologists to more accurately locate tumors within the prostate
when taking biopsies. This increases the accuracy with which men with clinically significant lesions are identified. It also
enables the injection of an ablative agent, such as topsalysin, directly into previously identified clinically significant tumors
located within the prostate.
About Sophiris
Sophiris Bio Inc. is a late-stage clinical biopharmaceutical company developing topsalysin (PRX302) for the treatment of
patients with urological diseases. Topsalysin is in Phase 2 clinical development for the focal treatment of localized prostate
cancer as well as Phase 3 clinical development for the treatment of the lower urinary tract symptoms of benign prostatic
hyperplasia (BPH). Topsalysin is a highly potent ablative agent that is selective and targeted in that it is only activated by
enzymatically active PSA which is found in high concentrations in the transition zone of the prostate and in and around prostate
tumor cells. More than 450 patients have received treatment with topsalysin, which continues to appear to be safe and well
tolerated. For more information, please visit www.sophirisbio.com.
Certain statements included in this press release may be considered forward-looking, including the quotes of Sophiris'
President and CEO and expectations about further development of topsalysin (PRX302), including the timing of expected results,
the expected safety or efficacy results for the full study, the administration of a second dose and plans relating to the design
and execution of a Phase 3 clinical trial. Such statements involve known and unknown risks, uncertainties and other factors that
may cause actual results, performance or achievements to be materially different from those implied by such statements, and
therefore these statements should not be read as guarantees of future performance or results. Some of the risks and uncertainties
that could cause actual results, performance or achievements to differ include without limitation, risks associated with clinical
development, including the risk that results of the final Phase 2b study will not be available when
expected, risks that the administration of a second dose will not be included in further development, risk that the study
endpoint[s] will not be achieved, risks relating to the design of a possible Phase 3 clinical trial, risks that the manufacturing
of clinical drug supply for Phase 3 clinical trials will not be completed when expected or at the expected costs, risks that the
Company will be able to fund future clinical trials and other risks and uncertainties identified by Sophiris in its public
securities filings with the SEC. All forward-looking statements are based on Sophiris' current beliefs as well as assumptions
made by and information currently available to Sophiris and relate to, among other things, anticipated financial performance,
business prospects, strategies, regulatory developments, clinical trial results, market acceptance, ability to raise capital and
future commitments. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of
the date of this press release. Due to risks and uncertainties, including the risks and uncertainties identified by Sophiris in
its public securities filings; actual events may differ materially from current expectations. Sophiris disclaims any intention or
obligation to update or revise any forward-looking statements, whether as a result of new information, future events or
otherwise.
Company Contact:
Peter Slover
Chief Financial Officer
(858) 777-1760
Corporate Communications and Media Contact:
Jason Spark
Canale Communications
(619) 849-6005
jason@canalecomm.com
Investor Contact:
Bill Slattery, Jr.
Burns McClellan
(212) 213-0006
bslattery@burnsmc.com
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SOURCE Sophiris Bio Inc.