NEWS RELEASE

Submitted by editor on Tue, 2020-04-28 22:00

Bicycle Therapeutics Announces Pipeline Progress Update

2020-04-07 00:00:00

Our Clinical Development Partnerships collaborators, Bicycle Therapeutics, announce the following update to their clinical portfolio:

- Phase I dose escalation completed for BT1718 –RP2D established and preliminary signs of anti-tumour activity observed, including one partial response
- Progress across pipeline continues despite uncertainties associated with coronavirus disease (COVID-19) pandemic; currently, key 2020 events remain on track

CAMBRIDGE, England & BOSTON, April 7, 2020 –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 progress updates across its wholly-owned and partnered programs in oncology and non-oncology indications.

“We and our partners have recently achieved important progress in the advancement of our pipeline that we believe could catalyze the next stage of growth for Bicycle,” said Kevin Lee, Ph.D., Chief Executive Officer of Bicycle Therapeutics. “Cancer Research UK has identified a recommended dose, which is within the therapeutic range predicted by preclinical models, for the Phase IIa study of BT1718, which we expect to commence this year ... In addition, we believe our recently announced early discovery collaboration with Genentech will allow us to make considerable investments in expanding our portfolio of immuno-oncology assets, including our wholly-owned programs nearing late preclinical development. Beyond oncology, we continue to make progress on our partnered programs and to execute on our strategy of leveraging our collaborators’ expertise in specific therapeutic areas to advance the development of Bicycle-based medicines across a broad range of serious diseases.”

Dr. Lee continued: “While we expect that the evolving COVID-19 pandemic may impact the pace of clinical development, at this time, we believe the strong progress we’ve achieved across our pipeline to date will enable us to reach our anticipated 2020 milestones as planned.”

BT1718, a potential first-in-class BTC targeting key tumour antigen MT1-MMP
• Cancer Research UK Completed Phase I Dose Escalation of BT1718 in Patients with Solid Tumors, Established Recommended Phase II Dose (RP2D) at 20 mg/m2. The key objectives were met in a Phase I dose escalation sponsored by Cancer Research UK and evaluating safety and tolerability of BT1718 in an unselected group of patients with advanced solid tumours. Based on study results, Cancer Research UK established an RP2D for the expansion cohorts at 20 mg/m2 administered once weekly. This recommended dose is within the efficacious dose range predicted by preclinical models, in which an equivalent dose level was associated with complete responses. With once-weekly dosing, BT1718 appeared tolerable, with manageable adverse events.
Though not a key objective of the Phase I portion of the Phase I/IIa study, preliminary signs of anti-tumour activity were observed during the dose escalation. As reported at the European Society of Medical Oncology (ESMO) 2019 Annual Congress, 13 of 24 evaluable patients (54%) had stable disease at the eight-week timepoint, including a patient who experienced a 45% reduction in a target lesion, with findings generally remaining consistent as the trial progressed. Today, Bicycle announced that, in addition, one patient with small cell lung cancer experienced a partial response, with a 68% reduction in a target lesion.

The Company anticipates that Cancer Research UK will initiate the Phase IIa portion of the Phase I/IIa study of BT1718 in 2020, although timing may be dependent on the ongoing COVID-19 pandemic. These expansion cohorts will include patients determined to be MT1-MMP-positive based on a prespecified tumour membrane H-score. Initially, patients will be enrolled into two expansion cohorts, one in squamous non-small cell lung cancer (NSCLC) and the other in an all-comers “basket” cohort. Depending on results from these first two cohorts, additional cohorts may be initiated.

Novel, fully synthetic Bicycle systemic immune cell agonists and tumour-targeted immune cell agonists (TICAs™)

• Cancer Research UK Advancing Preclinical Development of BT7401. BT7401 is a multivalent, systemic immune cell agonist of CD137 built from multiple CD137 monomeric Bicycles connected by stable linkers through a central hinge. In 2020, Bicycle announced a second collaboration with Cancer Research UK, in which the organization will fund and sponsor development of BT7401 through a Phase I/IIa clinical study. Preclinical development of BT7401 funded by Cancer Research UK is ongoing.

Notes to editors

About Bicycle Therapeutics
Bicycle Therapeutics (NASDAQ: BCYC) is a clinical-stage biopharmaceutical company developing a novel class of medicines, referred to as Bicycles®, for diseases that are underserved by existing therapeutics. Bicycles are fully synthetic short peptides constrained with small molecule scaffolds to form two loops that stabilize their structural geometry. This constraint facilitates target binding with high affinity and selectivity, making Bicycles attractive candidates for drug development. Bicycle’s lead product candidate, BT1718, a Bicycle Toxin Conjugate (BTC) that targets MT1-MMP, is being investigated in an ongoing Phase I/IIa clinical trial in collaboration with the Centre for Drug Development of Cancer Research UK. Bicycle is also evaluating BT5528, a second-generation BTC targeting EphA2, in a Company sponsored
Phase I/II study. Bicycle is headquartered in Cambridge, UK with many key functions and members of its leadership team located in Lexington, MA. For more information, visit bicycletherapeutics.com.

Forward-Looking Statements
This press release may contain forward-looking statements made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. These statements may be identified by words such as “aims,” “anticipates,” “believes,” “could,” “estimates,” “expects,” “forecasts,” “goal,” “intends,” “may,” “plans,” “possible,” “potential,” “seeks,” “will” and variations of these words or similar expressions that are intended to identify forward-looking statements, although not all forward-looking statements contain these words. Forward-looking statements in this press release include, but are not limited to, statements regarding Bicycle’s collaborations with multiple third parties; the discovery, development and potential commercialization of potential product candidates using Bicycle’s
technology and under collaboration agreements with third-parties; anticipated advancement of preclinical development efforts and initiation and progression of clinical trials; the therapeutic potential for Bicycles in various disease applications; the potential impacts of the ongoing COVID-19 pandemic on
site initiation, patient enrollment and treatment; and the potential to receive milestone payments and royalties under Bicycle’s collaboration agreements. Bicycle may not actually achieve the plans, intentions or expectations disclosed in these forward-looking statements, and you should not place
undue reliance on these forward-looking statements. Actual results or events could differ materially from the plans, intentions and expectations disclosed in these forward-looking statements as a result of various factors, including: uncertainties inherent in the initiation and completion of preclinical studies
and clinical trials and clinical development of Bicycle’s product candidates; availability and timing of results from preclinical studies and clinical trials; whether initial or interim results from a clinical trial will be predictive of the final results of the trial or the results of future trials; the risk that trials and studies may be delayed and may not have satisfactory outcomes; potential adverse effects arising from the testing or use of Bicycle’s product candidates; risks related to Bicycle’s ability to maintain existing collaborations and realize the benefits thereof; expectations for regulatory approvals to conduct trials or
to market products; risks to site initiation, clinical trial commencement, patient enrollment and followup, as well as to Bicycle’s and its collaboration partners’ abilities to meet other anticipated deadlines and milestones, presented by the ongoing COVID-19 pandemic; and other important factors, any of
which could cause our actual results to differ from those contained in the forward-looking statements, are described in greater detail in the section entitled “Risk Factors” in our Annual Report on Form 10-K
filed with the Securities and Exchange Commission (SEC) on March 10, 2020, as well as in other filings Bicycle may make with the SEC in the future. Any forward-looking statements contained in this press release speak only as of the date hereof, and Bicycle expressly disclaims any obligation to update any
forward-looking statements contained herein, whether as a result of any new information, future events, changed circumstances or otherwise, except as otherwise required by law.

Investor and Media Contact:
Bicycle Therapeutics
Maren Killackey
maren.killackey@bicycletx.com
+1-617-203-8300

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