Correction to Release Dated May 19, 2021
Paris, France; Cambridge, Massachusetts (USA); May 21, 2021 – NANOBIOTIX (Euronext : NANO –– NASDAQ: NBTX – the ‘‘Company’’), a late-clinical stage biotechnology company pioneering physics-based approaches to expand treatment possibilities for patients with cancer, today announced the upcoming presentation of updated results from the Company’s priority development pathways in head and neck cancer (head and neck squamous cell carcinoma; HNSCC) and in immunotherapy for advanced cancers at the 2021 Annual Meeting of the American Society for Clinical Oncology (ASCO). The Company will also present a poster with long-term safety analysis from its pivotal phase II/III study in soft tissue sarcoma.
“The data we will present at ASCO provide further support for the paradigm-shifting potential of NBTXR3 as a foundational solid tumor-agnostic and combination-agnostic cancer therapeutic,” said Laurent Levy, co-founder and chief executive officer of Nanobiotix. “We are excited to present both long-term safety data from our phase III soft tissue sarcoma study, along with updated safety and efficacy data from our second single-agent registration pathway in head and neck cancer. Moreover, we are particularly eager to present a growing body of data suggesting that after activation by radiotherapy, NBTXR3 may prime an immune response that could enhance the efficacy of immune checkpoint inhibitors as a first-line therapy, overcome resistance for refractory patients, and meaningfully expand the tumor types that respond to the class by transforming cold tumors into hot tumors.”
Local Control as a Single-Agent for Patients with Head and Neck Cancer
Abstract #6051: Phase I Dose Expansion Study of Functionalized Hafnium Oxide Nanoparticles (NBTXR3) in Cisplatin-Ineligible Locally Advanced HNSCC Patients
The number of elderly patients diagnosed with locally advanced HNSCC (LA-HNSCC) is increasing. While concurrent chemoradiation is the non-surgical standard of care, not all patients can tolerate platinum-based chemotherapy (e.g., cisplatin). The Nanobiotix phase I dose expansion study in patients with LA-HNSCC (Study 102) is evaluating a single dose of NBTXR3 at 22% of baseline tumor volume (the recommended phase II dose; RP2D). Primary endpoints of the study are objective response rate (ORR) and complete response rate (CRR) of the primary tumor. Study 102 is expected to recruit a total of 44 evaluable patients. To date, 52 total patients have been injected with NBTXR3 in the study overall, of which 40 have been evaluable.
Updated data presented at ASCO further support NBTXR3 administration, followed by activation with radiotherapy, as feasible and well-tolerated. Six (6) serious adverse events (SAEs) related to NBTXR3 were observed across five (5) patients. A total of ten (10) deaths related to adverse events were reported. Four (4) deaths related to radiotherapy were observed, along with one (1) death from sepsis that was investigator-assessed as possibly related to NBTXR3, radiotherapy, and cancer.
At a median follow up of 8.1 months, evaluable patients demonstrated a high primary tumor ORR of 82.5% and a 62.5% CRR.  These results are consistent with those observed in the dose escalation part of the study and suggest durability of efficacy.
Nanobiotix plans to launch a pivotal phase III global registration trial evaluating NBTXR3 as a single-agent activated by radiotherapy for patients with LA-HNSCC in 2021.
Priming Immune Response and Immunotherapy Combination Across Oncology
Abstract #2590: A Phase I Study of NBTXR3 Activated by Radiotherapy for Patients with Advanced Cancers Treated with an Anti-PD-1 Therapy
Abstract #2591: Overcoming Resistance to Anti-PD-1 with Tumor-Agnostic NBTXR3: From Bench to Bedside
Cancer immunotherapies such as anti-PD-1 have shown promising clinical outcomes over the past two decades and are often used to treat advanced cancers once other therapies have reached the end of their effectiveness. However, across tumor indications, the significant majority of patients (80-85% according to published data) receive only a temporary benefit from anti-PD-1—or no benefit at all—as they either develop resistance to the therapy over time or are non-responsive to treatment altogether.
Previously reported data from the Company’s phase I immunotherapy study in advanced cancers (Study 1100) and its preclinical collaboration with The University of Texas MD Anderson Cancer Center support NBTXR3 activated by radiotherapy as a potential primer of immune response. These data suggest that when combined with anti-PD-1, NBTXR3 could contribute to tumor regression in patients with advanced and metastatic tumors regardless of the patient’s prior exposure to anti-PD-1.
Nanobiotix will provide an update on Study 1100 with additional patients and further follow up prior to the conference (abstract #2590). The Company will also present a compilation of preclinical and clinical data supporting NBTXR3 as a potentially tumor-agnostic, therapeutic combination-agnostic agent that could overcome resistance to immune checkpoint inhibitors and increase response rates across tumor indications (abstract #2591).
Local Control as a Single-Agent for Patients with Soft Tissue Sarcoma
Abstract #11544: Long-Term Evaluation of the Novel Radioenhancer NBTXR3 plus Radiotherapy in Patients with Locally Advanced Soft Tissue Sarcoma Treated in the Phase III Act.in.Sarc Trial
A long-term safety analysis following the Nanobiotix phase II/III pivotal study evaluating NBTXR3 as a single-agent activated by radiotherapy in patients with locally advanced soft tissue sarcoma (STS) did not observe a negative impact on patient quality of life and long-term morbidity. The long-term safety profile of NBTXR3, together with its efficacy data, further supported a favorable benefit-risk ratio for patients with STS. The analysis highlighted potential for future indications, including non-resectable sarcoma, pediatric tumors, and re-irradiation.
Nanobiotix Investor Event
Nanobiotix will host a virtual investor event featuring several key opinion leaders, including study investigators, after the ASCO Annual Meeting on Friday, June 11, 2021 at 8 am ET. The discussion will expand on the new immunotherapy results from Study 1100 that will be reported prior to ASCO, providing additional detail and clinical perspective, following the ASCO presentation. Register here.
Calculations include one patient marked ** in Figure 1 recorded as unconfirmed Complete Response by principal investigator per eCRF
 Calculations include one patient marked ** in Figure 1 recorded as unconfirmed Complete Response by principal investigator per eCRF