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NBTXR3

Phase 2

Adult Soft Tissue Sarcoma | Unknown | Oncology |Nanobiotix S.A.|Last Updated: Oct 24, 2025

Success Probability
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Trial Design
RandomizedACTIVE_CONTROLLEDDMC
Total Trials2
Total Enrollment202
FDA Designations
No designations recorded
Clinical trial landscape

NBTXR3 · 3 trials · 12 indications

Phase 2 1Phase 1 2
NCT02379845NBTXR3 Crystalline Nanoparticles and Radiation Therapy in Treating Randomized Patients in Two Arms With Soft Tissue Sarcoma of the Extremity and Trunk WallAdult Soft Tissue Sarcoma
COMPLETED180 Analytics
PHASE2COMPLETED
NBTXR3 Crystalline Nanoparticles and Radiation Therapy in Treating Randomized Patients in Two Arms With Soft Tissue Sarcoma of the Extremity and Trunk Wall
Adult Soft Tissue SarcomaUnlock trial analytics
Study Endpoints
Primary Endpoints
Pathological Complete Response Rate (pCRR)
36 months

To compare antitumor activity in terms of Pathological complete response rate (pCRR) of intratumor injection of NBTXR3 activated by external beam radiation therapy (EBRT), versus EBRT alone

[Dose Escalation Part]: Determination of the Recommended Dose
24 Months

Determination of DLTs, the MTD (if possible), and RP2Ds for each cohort

[Dose Expansion Part]: Safety Evaluation at RP2D
24 Months

Incidence of Grade 3 and higher treatment-related AEs

Evaluation of the feasibility of the intratumor injection of NBTXR3
6 months

\- To evaluate the feasibility of NBTXR3 given as intratumor implantation (by injection) and activated by external beam radiation in patients with soft tissue sarcoma of the extremity and trunk wall

Assessment of the safety profile and determination of early dose limiting toxicity
20 months

\- To assess the safety profile and determine the early dose limiting toxicity (DLT) of NBTXR3 intratumor implantation (by injection) and activated by external beam radiation

Secondary Endpoints
Incidence of early and late TEAE, post-TEAE, SAE and laboratory abnormalities (NCI CTCAE V4.0)
36 months
Objective Response Rate (ORR) by Imaging (MRI) according to RECIST 1.1
36 months
Tumor volume changes (theoretical tumor volume estimated as: Length x Width x Depth
36 months
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Study Design & Arms
AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Arm AEXPERIMENTALNBTXR3 + Radiotherapy
Arm BACTIVE_COMPARATORRadiotherapy alone
NBTXR3 activated by SABR followed by anti-PD-1 monotherapyEXPERIMENTALIntratumoral injection of NBTXR3 followed by SABR followed by monotherapy with nivolumab or pembrolizumab
NBTXR3EXPERIMENTAL -
Interventions
NameTypeDescription
NBTXR3DEVICEOne intratumor implantation by injection
Radiation therapyDEVICE5 weeks/50 Gy (5 x 2 Gy by week)
SABRRADIATIONRadiotherapy given as a definite number of fractions at the dose defined for each radiation field
NivolumabDRUGAnti-PD-1 monotherapy
PembrolizumabDRUGAnti-PD-1 monotherapy
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Eligibility Criteria
Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites42

Inclusion Criteria: * Age: 18 years and older * Locally Advanced Soft Tissue Sarcoma of the Extremity and Trunk Wall * All grades * Candidate to radiotherapy + surgery (ESMO guideline 2014) i.e. tumor must not have involvement of bone and / or vessel and or nerve : * Primary tumor or, * Relaps...

Countries:AustraliaBelgiumFranceGermanyHong KongHungaryItalyNorwayPhilippinesPolandRomaniaSouth AfricaSpainUnited States
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT03589339primaryCompletionDate: changed
LOWMay 24, 2026NCT03589339studyFirstPostDate: changed