- Company
achieves positive proof of concept in Phase IIa study of its lead product
candidate, Bria-IMT, in advanced breast cancer patients
- Efficacy
data comparable to that of other approved breast cancer therapies in a
similar stage of development
- Combination
study with immune checkpoint inhibitors in the works, enrollment already
open
BriaCell Therapeutics Corp. (OTCQB: BCTXF) (TSX.V: BCT), a
clinical-stage biotechnology company focused on the development of proprietary
targeted immunotherapy for advanced breast cancer, has achieved proof of
concept and reported promising results from a Phase IIa study of its lead
clinical candidate, Bria-IMT.
Study data indicates promising anti-tumor activity for
Bria-IMT in heavily pre-treated advanced breast cancer patients, according to a
company press release (http://ibn.fm/fXxxL).
Additionally, results highlight the outstanding safety and tolerability of
BriaCell Therapeutics’ lead product candidate, with efficacy data similar or
superior to other approved breast cancer drugs that are in a similar stage of
development.
“This top-line data compares very well with data from
existing breast cancer therapies which have a sizable market share when they
were at a similar stage of clinical development, as well as with other
promising breast cancer treatments currently under study,” BriaCell CEO and
President Dr. Bill Williams stated in a news release.
A total of 31 patients with advanced stage breast cancer
were enrolled in the Phase II Bria-IMT monotherapy study. The proof of concept
and mechanism of action work is based on the results observed in the first 20
patients, while assessment of the remaining 11 patients is still in progress.
The preliminary data seems to confirm the company’s HLA
Matching Hypothesis and support its strategy for the development of Bria-OTS,
the first off-the-shelf personalized immunotherapy for advanced breast cancer,
designed to provide treatment without the high costs and difficult
manufacturing generally associated with personalized therapies. The technology
is applicable to other types of cancer, as well.
“Bria-IMT appears to be most effective in patients who match
with Bria-IMT at 2 HLA loci (types) further supporting BriaCell’s HLA Matching
Hypothesis, and the development of Bria-OTS to cover 90% of the patient
population,” Williams added. “We are delighted with these positive clinical
findings that confirm our HLA Matching Hypothesis in the Phase I/IIa trial in
advanced breast cancer showing significant tumor shrinkage without serious side
effects.”
The company has launched a Phase IIa combination study of
Bria- IMT with pembrolizumab – marketed as Keytruda and manufactured by Merck
& Co., Inc. (NYSE: MRK) – or as ipilimumab – marketed as Yervoy and
manufactured by Bristol-Myers Squibb Company (NYSE: BMY) – in advanced breast
cancer. The combination study is listed on ClinicalTrials.gov as NCT03328026.
These checkpoint inhibitors, pembrolizumab (anti-PD-1) and
ipilimumab (anti-CTLA-4), have come to the forefront in the fight against
cancer with substantial benefits for some patients. Most recently, the
significance of immune checkpoints was recognized by the Nobel committee, which
awarded Drs. Honjo (PD-1) and Allison (CTLA-4) with the 2018 Nobel Prize in
Physiology or Medicine.
“In our view, the combination of Bria-IMT with Keytruda or
Yervoy has the potential to provide a new therapeutic option and substantial
clinical benefit in heavily pre-treated advanced breast cancer patients where
there remains a significant unmet need,” Williams explained.
With the global cancer immunotherapy market expected to
reach nearly $120 billion by 2021 (http://ibn.fm/WVGZ0) and with more than 266,000 new cases
of invasive breast cancer expected to be diagnosed in the U.S. this year (http://ibn.fm/qkuk8), BriaCell
believes that it can leverage its proprietary technology to address the needs
of the breast cancer medication market and also develop immunotherapies for
other cancer indications in the near future.
For more information, visit the company’s website at www.BriaCell.com
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