Plus Therapeutics Highlights Three REYOBIQ™ Clinical Data Presentations at 2025 WFNOS/SNO Annual Meeting

Core Insights - Plus Therapeutics, Inc. presented positive clinical data for REYOBIQ at the WFNOS/SNO Annual Meeting, indicating no dosage limiting toxicity in the ReSPECT-LM trial and promising safety and efficacy in the ReSPECT-GBM trial [1][2][12] - The company aims to improve survival rates for patients with central nervous system (CNS) cancers through its expanding clinical data set and the CNSide diagnostic portfolio [2][12] ReSPECT-LM Trial - The Phase 1 trial for Leptomeningeal Metastases (LM) showed that REYOBIQ was well-tolerated at a maximum dose of 66 mCi, with a recommended Phase 2 dose of 44.1 mCi [7] - Enrollment in Cohort 1 has begun, with three patients treated without dose limiting toxicity [7] ReSPECT-GBM Trial - The Phase 1/2 trial for recurrent Glioblastoma (GBM) has enrolled 24 out of a planned 34 patients, with a recommended Phase 2 dose of 22.3 mCi based on safety profiles [8] - Efficacy data indicated a median overall survival of 17 months for patients receiving ≥100 Gy, compared to 6 months for those receiving <100 Gy, surpassing historical outcomes for bevacizumab monotherapy [14] Safety Profile - Most treatment-related adverse events in both Phase 1 and 2 trials were Grade 1 or 2, with no treatment-related deaths reported [9] - Common adverse events included lymphopenia (7.9%), cognitive disorder (7.0%), and headache (7.0%) [9] Imaging and Efficacy - MRI combined with SPECT imaging biomarkers effectively evaluates overall survival response in recurrent GBM treatment, aiding in personalized patient planning [12][14] - REYOBIQ's efficacy is positively correlated with treatment coverage ratio and progression-free survival, while negatively correlated with tumor volume [14] About REYOBIQ - REYOBIQ (rhenium Re186 obisbemeda) is a novel injectable radiotherapy designed for targeted high-dose radiation in CNS tumors, with potential advantages over currently approved therapies [15] - The drug is being evaluated in multiple clinical trials, including ReSPECT-GBM, ReSPECT-LM, and ReSPECT-PBC, with funding support from various institutions [15]