Nectin-4 portfolio comprised of BT8009 and BT7480 represents potential opportunity to become leader in treating Nectin-4-driven cancers, starting with metastatic urothelial cancer (mUC)
Updated BT8009 clinical data continue to support promising response and differentiated safety profile in mUC as well as emerging clinical activity in additional tumor types beyond bladder
EphA2 portfolio led by BT5528 could be the first to address a historically undruggable target widely expressed in many cancers
Additional work in oncology and beyond highlight the breadth of the Bicycle® platform and its potential to address a multitude of diseases
Event and webcast today at
“During our first R&D Day, we are excited to showcase the advantages of our Nobel Prize-winning science and our strategy to discover and develop therapies with greater tolerability that could provide enhanced benefit to a multitude of patients, starting with those who have cancer,” said
“Today we are excited to provide clinical updates for our three lead programs,” said
Key R&D Day Highlights
BT8009 is a Nectin-4 Bicycle toxin conjugate (BTC®) designed to overcome the significant toxicity associated with other toxin conjugate approaches. In the ongoing Phase 1/2 Duravelo-1 study involving heavily pre-treated patients, BT8009 showed:
- A promising response profile with a 38% objective response rate (ORR) in 26 patients with metastatic urothelial cancer (mUC) receiving 5 mg/m2 weekly and who had not been treated with enfortumab vedotin (EV-naïve), and a median duration of response (mDOR) of 11.1 months in 10 patients with 5 responders still on therapy. This includes 1 complete response, 7 partial responses and 2 unconfirmed responses.
- Encouraging initial data in other cancers such as ovarian, triple-negative breast (TNBC) and non-small cell lung (NSCLC) that support further expansion beyond mUC.
An emerging differentiated safety profile seen in 113 patients with various types of cancer receiving 5 mg/m2 weekly, with treatment-related adverse events being primarily low in frequency and severity.
- Adverse events of interest such as ocular disorders, peripheral neuropathy and skin reactions were low in frequency and severity. Importantly, treatment-related peripheral neuropathy was low-grade and often reversible, including zero cases of severe (≥Grade 3) peripheral sensory neuropathy (damage to the nerves that carry sensations like pain to the brain).
- In 34 EV-naïve mUC patients, treatment-related adverse events and adverse events of interest were also low, similar to the 5 mg/m2 weekly total safety study population. Notably, there were zero cases of severe (≥Grade 3) ocular disorders, peripheral neuropathy or skin reactions.
- In 7 heavily pre-treated mUC patients receiving BT8009 5 mg/m2 weekly in combination with pembrolizumab, an acceptable tolerability profile was observed with limited severe treatment-related adverse events, including zero cases of severe (≥Grade 3) ocular disorders, peripheral neuropathy or skin reactions.
BT7480 is a Nectin-4 targeted CD137 agonist designed to overcome immune agonist toxicities and activate the immune system in Nectin-4 expressing tumors. Clinical development has been guided by safety considerations observed with first-generation CD137 agonists, the novelty of the Bicycle® platform technology and the
- In 33 patients assigned to receive one of 9 different doses of BT7480, an emerging differentiated safety and tolerability profile with a low number of severe adverse events. The majority of the patients studied had tumors that expressed Nectin-4 and CD137.
- Two unconfirmed partial responses in heavily pre-treated patients with cervical cancer.
- Three prolonged stable disease (≥7 months) in NSCLC and anal cancer.
Ephrin-A2 (EphA2) Portfolio
BT5528 is an EphA2 BTC® designed to overcome the significant toxicity associated with other toxin conjugate approaches that have been unsuccessful. In an ongoing Phase 1/2 clinical trial enrolling patients with various solid tumors, BT5528 showed:
- In 109 patients, an acceptable emerging tolerability profile with few severe adverse events. This was also seen in 74 patients receiving 6.5 mg/m2 every other week, the dose being studied in various tumors in the expansion cohorts. Importantly, unlike other EphA2-targeted agents, no bleeding events were observed in patients treated with BT5528 at any dose.
- Encouraging early activity in mUC with a 39% ORR in 18 patients receiving 6.5 mg/m2, 8.5 mg/m2 or 10 mg/m2 every other week, and an mDOR of 4 months in 7 patients with one responder still on therapy. This includes 6 partial responses and 1 unconfirmed response.
- Encouraging emerging data in other cancers such as ovarian, gastric/upper gastrointestinal and head and neck that are informing the dose optimization strategy and further development.
Given the promising tolerability profile of BT5528 at 6.5 mg/m2 every other week and in line with the FDA’s Project Optimus initiative,
The company will highlight its progress in developing its next generation of Bicycle® conjugates, including:
- Next generation BTCs: Focusing on designing linkers specifically for BTCs, which may provide enhanced payload release into the tumor. The company plans to select a BTC® clinical candidate using next-generation technology in the second half of 2024.
Bicycle Radio Conjugates (BRC™): Developing a pipeline of novel binders with optimized properties for radioisotope delivery. For example, preclinical studies of a BRC targeting MT1-MMP, a high-value target in cancer treatment, showed potent anti-tumor activity and a favorable tolerability profile. Over 2024,
Bicycle Therapeuticsintends to generate early human imaging data from its wholly owned BRC pipeline.
Beyond Oncology: Successfully exploring other therapeutic applications of the Bicycle® platform technology using non-dilutive funding, demonstrating the platform’s plug-and-play approach to precision targeting. For example, through partnerships with
Dementia Discovery Fundand Ionis Therapeutics, the company demonstrated that delivery of therapies to the central nervous system, including across the blood brain barrier, can be achieved with Bicycle® molecules. Bicycle Therapeuticswill continue to develop Bicycle® molecules to address disease outside of oncology through innovative partnerships.
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 anticipated advancement of its current and prospective product candidates, including the timing of initiation and design of the Duravelo-2 Phase 2/3 clinical trial and potential accelerated approval of BT8009; the timing of initiation and design of a potential Phase 2 trial that could support accelerated approval for BT7480; the timing and conduct of combination cohorts for BT7480 with checkpoint inhibitors; the timing of initiation and design of clinical trials for BT5528; the timing of initiation of IND-enabling work for BT7455; the anticipated progression of Bicycle’s clinical trials and preclinical studies; the availability of and timing of updates for clinical candidates BT8009, BT5528 and BT7480; the therapeutic potential for Bicycle® molecules in bladder cancer and other oncologic indications, as well as other indications beyond oncology; and current and prospective collaborations. 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, progress and completion of clinical trials and preclinical studies and clinical and preclinical development of Bicycle’s product candidates; availability and timing of results from clinical trials; whether the outcomes of preclinical studies will be predictive of clinical trial results; 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 may have unsatisfactory outcomes; potential adverse effects arising from the testing or use of Bicycle’s current or prospective product candidates; the risk that Bicycle may not maintain its current collaborations or enter into new collaborations in the future; and other important factors, any of which could cause Bicycle’s actual results to differ from those contained in the forward-looking statements, are described in greater detail in the section entitled “Risk Factors” in Bicycle’s Quarterly Report on Form 10-Q filed with the
SVP, Investor Relations and Corporate Communications