Nab-Paclitaxel Combined With Local Therapy in Relapsed SCLC

This is a prospective, single-arm, investigator-initiated clinical study (IIT) designed to evaluate the efficacy and safety of nab-paclitaxel combined with local radiotherapy for patients with extensive-stage small cell lung cancer (ES-SCLC) whose disease has progressed after first-line treatment. Small cell lung cancer (SCLC) is an aggressive type of lung cancer, and extensive-stage SCLC (ES-SCLC) refers to its advanced stage. For patients whose cancer progresses after first-line treatment, there are very limited effective second-line and later-line treatment options. Commonly used clinical regimens such as topotecan and lurbinectedin only provide modest improvements in tumor response and survival, and often cause severe hematological toxicities (represented by bone marrow suppression). This leaves patients in a persistent dilemma of "insufficient efficacy and limited tolerability", highlighting a clear unmet medical need for better treatment options in this population. Against this background, this study explores a comprehensive treatment strategy using nab-paclitaxel as the chemotherapy backbone, combined with local radiotherapy in eligible patients. Nab-paclitaxel is a nanoparticle albumin-bound form of paclitaxel, with a relatively controllable toxicity profile and manageable administration in clinical practice. Local radiotherapy may create a synergistic effect by improving the tumor immune microenvironment and enhancing local tumor control, with the goal of providing better evidence for a "chemotherapy ± local therapy" combination as a second-line treatment option.