Safety and efficacy of zolbetuximab plus chemotherapy for claudin 18 isoform 2-positive advanced gastric cancer: initial report of real-world experience

Le résumé fourni par la source

PURPOSE: This study evaluated the safety and preliminary efficacy of zolbetuximab plus chemotherapy in patients with claudin 18 isoform 2 (CLDN18.2)-positive advanced gastric cancer (AGC). METHODS: This single-institutional retrospective study enrolled patients with HER2-negative CLDN18.2-positive AGC who were treated with zolbetuximab plus chemotherapy between July 2024 and August 2025. RESULTS: The cohort included 50 patients with a median age of 63 years (range 30-83; 44% male). The primary tumor location was the stomach in 86% of the patients. Meanwhile, 26% of the patients underwent prior gastrectomy. The PD-L1 combined positive score was < 5 in 87% of patients. Among 24 patients with measurable lesions at baseline, the objective response and disease control rates were 66.7% and 87.5%, respectively. After median follow-up of 7.3 months, median progression-free survival and the duration of response were 6.7 [95% confidence interval (CI) 5.3-10.7] and 6.7 months (95% CI 4.7-10.2), respectively. Grade ≥ 3 treatment-emergent adverse events occurred in 62% of the patients, most commonly hypoalbuminemia (22%), neutrophil count decreased (22%) and anorexia (12%). Subsequent treatment was received by 83% of the patients. CONCLUSIONS: Zolbetuximab plus chemotherapy was administered to real-world patients with CLDN18.2-positive AGC with acceptable safety profiles and showed preliminary antitumor efficacy. Nevertheless, some adverse events warrant careful monitoring.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.