Tambotatug Pelitecan

Antibody-drug conjugates (ADCs), one of the emerging developing classes of antitumor drugs, have transformed the therapeutic paradigm in oncology. It stands out due to its properties of boasting the strength of both chemotherapy and targeted therapy. In small cell lung cancer (SCLC), ADC has also demonstrated its potential and appealing effect. Clinical trials of ADCs in SCLC are currently in full swing. While ADC has brought some encouraging results so far, several obstacles have been encountered, such as drug resistance, drug toxicities and the difficulty in the selection of patients benefiting from ADCs. Thus, a deepened and comprehensive understanding of the fundamental researches, as well as summarization of ADC development in SCLC might offer us some enlightenment and solutions to these tricky issues. Therefore, in the present review, we elaborate on the structure and mechanism of ADC, clinical trials conducted in SCLC. Additionally, we also outline the obstacles and propose future directions of ADC in SCLC, highlighting its in-depth research and prospective application in SCLC.

Antibody-drug conjugates (ADCs) have emerged as a transformative modality in the treatment of solid tumors. YL201, a novel B7H3-targeting ADC, leverages a tumor microenvironment activable linker-payload platform, coupled with a novel topoisomerase 1 inhibitor via a protease-cleavable linker. Here we report the findings from a large-scale, global, multicenter, phase 1 trial evaluating the safety, pharmacokinetics and preliminary efficacy of YL201 in patients with advanced solid tumors refractory to standard therapies. The trial included a dose-escalation part (phase 1) and a dose-expansion part (phase 1b). A total of 312 patients were enrolled across multiple tumor types, including extensive-stage small cell lung cancer (ES-SCLC), nasopharyngeal carcinoma (NPC), non-small cell lung cancer, esophageal squamous cell carcinoma and other solid tumors. The maximum tolerated dose was determined to be 2.8 mg kg^-1, and the recommended expansion dose was selected as 2.0 mg kg^-1 and 2.4 mg kg^-1 every 3 weeks. The most common grade 3 or higher treatment-related adverse events included neutropenia (31.7%), leukopenia (29.5%) and anemia (25.0%). Only 4 cases of interstitial lung disease (1.3%) and 1 case of infusion reactions (0.3%) were observed. Encouraging anti-tumor activity was observed, particularly in patients with ES-SCLC (objective response rate (ORR), 63.9%), NPC (ORR, 48.6%), lung adenocarcinoma (ORR, 28.6%) and lymphoepithelioma-like carcinoma (ORR, 54.2%). No significant correlation between B7H3 membrane expression and the ORR was found. YL201 demonstrated an acceptable safety profile and a promising efficacy in heavily pretreated patients with advanced solid tumors, particularly in those with ES-SCLC, NPC or lymphoepithelioma-like carcinoma. Phase 3 clinical trials for patients with SCLC and NPC have already been initiated. ClinicalTrials.gov identifiers: NCT05434234 and NCT06057922 .