In Vitro in Vivo NBTXR3

2021 – Radiotherapy-activated NBTXR3 nanoparticles Increase CD8+ T cell infiltration and diversity in tumors, and modulate the immunopeptidome of cancer cells

Congress Abstracts, In Vitro in Vivo NBTXR3, In Vivo

When exposed to radiotherapy (RT), NBTXR3 nanoparticles increase radiation dose deposition from within the cancer cells. NBTXR3 is intended for a single intratumor injection. Results from a phase II/III clinical trial in patients with locally advanced Soft Tissue Sarcoma demonstrated significant superiority and clinical benefits of NBTXR3 activated by RT compared to RT alone […]

2021 – Dual blockade of LAG3 and TIGIT improves the treatment efficacy of a nanoparticle-mediated immunoradiation in anti-PD1 resistant lung cancer in mice

Congress Abstracts, In Vitro in Vivo NBTXR3, In Vivo

129Sv/Ev mice were inoculated with 50,000 aPD1-resistant 344SQR cells in the right leg on day 0 (primary tumor) and with 50,000 cells in the left leg on day 4 (secondary tumor). Primary tumors were injected with NBTXR3 radioenhancer nanoparticles on day 7 and irradiated with 12 Gy on days 8, 9, and 10. Anti-PD1, aLAG3, and aTIGIT were given to mice by intraperitoneal injections on days 5, 8, 11, 14, 21, 28, 35, and 42. […]

2021 – Overcoming Resistance to Anti-PD-1 With Tumor Agnostic NBTXR3: From Bench to Bedside

Congress Abstracts, In Vitro in Vivo NBTXR3, In Vivo

Immune checkpoint inhibitors (ICI) can improve outcomes in patients who respond to treatment, however most patients exhibit resistance. Overcoming this resistance is the main challenge in immune-oncology and recent studies suggest radiotherapy (RT) may improve ICI response rates. NBTXR3, composed of functionalized hafnium oxide nanoparticles, is injected intratumorally and activated by RT. […]

2020 – NBTXR3 nanoparticle with immunoradiation improves survival and generates long-term anti-tumor memory in an anti-PD1 resistant murine lung cancer model

Congress Abstracts, In Vitro in Vivo NBTXR3, In Vivo

Although treatment with high-dose (HD) radiation (XRT) and NBTXR3 on primary tumors in combination with systemic anti-PD1 was able to significantly improve abscopal effect in 344SQR murine metastatic lung cancer model, most of the mice eventually died due to the growth of secondary tumors. […]

2020 – SITC – NBTXR3 Generates Long Term Immune Memory

Congress Abstracts, In Vitro in Vivo NBTXR3, In Vivo

Although treatment of high-dose (HD) radiation (XRT) and NBTXR3 (R3) on primary tumors in combination with systemic anti-PD1 was able to significantly improve abscopal effect in 344SQR murine metastatic lung cancer, most of the mice eventually expired due to the growth of metastatic tumors. Therefore, we studied the effects of R3 injection into primary tumors plus high-dose radiation on primary tumor and low-dose raditionon metastatic tumor plus dual-agent immunotherapy (IT) of anti-PD1 and anti-CTLA-4 to achive complete control of tumor growth at both the primary and the metastatic tumors in mice. […]

2020 – SITC – TCR Repertoire

Congress Abstracts, In Vitro in Vivo NBTXR3, In Vivo

For decades, radiotherapy (RT) has been a cornerstone of cancer treatment. Currently, approximately 50% of cancer patients will be treated with RT. Beyond the ability of RT to produce free radicals and to generate single and double-strand breaks in DNA, triggering cell death, preclinical and clinical studies have demonstrated that RT can have immunomodulatory effects. For example, RT can stimulate MHC class I expression on cancer cells, induce immunogenic cell death (ICD), and activate expression of various pro- and anti-inflammatory cytokines and adhesion molecules, allowing recruitment and activation of both innate and adaptive immune cells into the tumor. […]

2020 – SITC – NBTXR3 From Bench to Bedside

Clinical Data NBTXR3, Congress Abstracts, In Vitro in Vivo NBTXR3

Despite recent advances, resistance to immune checkpoint inhibitors (ICI), observed in over 80% of treated patients, is currently the main challenge immuno-oncology is facing. Intense efforts are being made to identify combination therapies that could improve ICI response rates. Administered intratumorally, NBTXR3 enhances the energy dose deposited by ionizing radiation within tumor cells, increasing the anti-tumor efficacy of radiation therapy (XRT) without adding toxicity to surrounding tissues. […]

2019 – NBTXR3 Activated By Radiotherapy Generates an Anti-Tumor Immune Response

Congress Abstracts, In Vitro in Vivo NBTXR3, In Vivo

Hafnium oxide nanoparticles (NBTXR3) activated by radiotherapy (RT) increase radiation dose deposit within cancer cells compared to RT alone. Currently 7 clinical trials are underway to evaluate NBTXR3+RT. To date, no dose limiting toxicities (DLTs) have been observed. Given that RT can prime an anti-tumor immune response we hypothesized that this response could be enhanced by NBTXR3+RT in both animals and humans. […]

2019 – RSNA – Anti-tumor immune response induced by NBTXR3

Congress Abstracts, In Vitro in Vivo NBTXR3, In Vivo

First in class hafnium oxide nanoparticles (NBTXR3) activated by radiotherapy (RT) increase radiation dose deposit within cancer cells compared to RT alone. Given that RT can prime an anti-tumor immune response we hypothesized that this response could be enhanced by NBTXR3+RT in both animals and humans. […]

2019 – ASTRO – NBTXR3 generates an anti tumor immune response

Congress Abstracts, In Vitro in Vivo NBTXR3, In Vivo

Abstracts in this section cover In Vitro and In Vivo data of NBTXR3. In Vitro means that NBTXR3 was studied in cells outside their normal biological context. In Vivo refers to tests of NBTXR3 in animals.