Bicycle Therapeutics plc (NASDAQ: BCYC), a biotechnology company pioneering a new and differentiated class of therapeutics based on its proprietary bicyclic peptide (Bicycle®) technology, today announced continued progress in its ongoing Phase I/II clinical trials of BT8009, BT5528 and BT7480.
"Last quarter, we reported interim clinical results from ongoing trials of two of our Bicycle toxin conjugates, BT8009 and BT5528, demonstrating preliminary anti-tumor activity in two tumor types, and announced the first patient dosed in the Phase I clinical trial of BT7480, our first tumor-targeted immune cell agonist to enter the clinic. In our trial of BT8009, we are pleased to confirm the preliminary activity and see that these patients remain on trial. We look forward to presenting interim BT8009 Phase I results at a medical meeting and initiating the BT5528 expansion cohorts this year," said Kevin Lee, Ph.D., Chief Executive Officer. "We are also pleased with our progress advancing BT7480 in the ongoing Phase I clinical trial and look forward to sharing additional details regarding the potential for Bicycles beyond our toxin conjugates as we strive to become a leader in the development of targeted oncology therapeutics."
Bicycle Toxin Conjugates® (BTCs) BT8009 and BT5528
In the ongoing Phase I portion of the Phase I/II clinical trial of BT8009, a second-generation BTC™ targeting Nectin-4, four out of 11 patients were previously reported to have a partial response under Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1, including one out of four (25%) in the 2.5mg/m2 dose and three out of seven (43%) at the 5.0 mg/m2 cohorts. All four patients previously reported as responders have since received at least one subsequent scan, and all have been confirmed as ongoing RECIST 1.1 responses. One patient in the 5.0 mg/m2 cohort, who previously was reported to have a partial response with an 89% tumor reduction, has now received two subsequent scans, which each showed that total tumor volume has been reduced by 100%, constituting a confirmed complete response. All four patients previously reported to have a RECIST 1.1 clinical response remain on therapy. The tolerability profile of the 2.5mg/m2 and 5.0 mg/m2 cohorts remains consistent with that previously reported.
Dose escalation in the BT8009 Phase I trial remains ongoing, with patients currently being dosed at 7.5mg/m2 weekly or every-other-week. Bicycle intends to present interim Phase I results from the ongoing clinical trial at a medical meeting this year.
The Phase I/II trial of BT5528, Bicycle’s second-generation BTC targeting EphA2, is also ongoing, with plans remaining on track to initiate the expansion cohorts this year, with an expected recommended Phase II dose of 6.5mg/m2 every-other-week.
Bicycle tumor-targeted immune cell agonist™ (Bicycle TICA™) BT7480
Bicycle also initiated a Phase I clinical trial of BT7480, a novel, fully synthetic Bicycle TICA targeting Nectin-4 and agonizing CD137, in the fourth quarter of 2021, and dose escalation in that trial remains ongoing. BT7480 and other Bicycle TICAs, including a novel NK-cell-engaging molecule, were the subjects of four posters at SITC in November 2021.
Management Team Updates
Bicycle is also announcing the expansion of and transition in its management team. Michael Skynner, Ph.D., the company’s Chief Operating Officer (COO), has been appointed to the newly created position of Chief Technology Officer, effective January 3, 2022, to focus on leading and overseeing the growth of Bicycle’s proprietary phage display discovery platform in oncology, as well as on creating innovative opportunities for the platform outside of oncology. Dr. Skynner joined the company in January 2016 as Vice President, Operations and Discovery and had served as COO since March 2018. Alistair Milnes, who has served as the company’s Vice President, Human Resources and Communications since January 2021, has assumed the COO role. Mr. Milnes previously led human resources and communications at multinational energy and mineral companies. Both Dr. Skynner and Mr. Milnes are based in the United Kingdom.
"We are delighted to announce our recent management team appointments, with Mike Skynner becoming our new CTO and Alistair Milnes moving to the COO role. Mike has been an invaluable contributor to Bicycle’s success to date and has led our platform discovery efforts since joining in early 2016. Following recent promising clinical progress, we believe it is time to focus on accelerating the growth of our proprietary oncology pipeline and on identifying innovative ways to potentially capitalize on our unique technology beyond our current therapeutic focus. I am confident that Mike can help us achieve these objectives."
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