This study is a prospective, single arm phase II clinical trial aimed at patients with advanced non-small cell lung cancer resistant to EGFR-TKI. The aim is to evaluate the efficacy and safety of trilaciclib in bone marrow protection before monotherapy with sacituzumab tirumotecan.
Patients with advanced non-small cell lung cancer resistant to EGFR-TKI, after signing informed consent, will be screened for eligible subjects who meet the inclusion criteria. Prior to receiving treatment with sacituzumab tirumotecan, they will be treated with trilaciclib until disease progression or intolerable toxicity occurs.
Record the dynamic changes of whole blood cell count; Hematological toxicity, including febrile neutropenia and associated infections; Transfusion of blood products and supplementation of hematopoietic raw materials. Perform tumor imaging evaluation according to RECIST 1.1. Baseline imaging examination should be conducted within 21 days prior to the first administration, and tumor imaging evaluation shall be conducted every 6 weeks (± 7 days) from the first study drug administration, or the frequency of imaging evaluation may be increased when there are clinical indications. Subjects who terminate the study drug treatment due to intolerable toxicity or other non disease progression reasons continue to receive tumor evaluation follow-up until disease progression, withdrawal from the study, or death (whichever occurs earliest).
After the screening period and one cycle of treatment, subjects may choose to undergo whole-body PET/CT imaging for exploratory analysis.
Age range: 18-75 years old; No gender restrictions;
ECOG PS score 0-1;
Expected survival time ≥ 3 months;
Patients with locally advanced or metastatic EGFR mutant non-small cell lung cancer diagnosed by histological or cytological examination, who have failed third-generation EGFR-TKI treatment and have experienced up to second-line EGFR-TKI treatment failure;
History of myeloid leukemia, myelodysplastic syndrome, or accompanying sickle cell disease;
Symptomatic CNS metastases and/or leptomeningeal diseases that require immediate radiotherapy or steroid treatment;
Have undergone surgery or radiation therapy within 4 weeks prior to the administration of the first dose of the study drug;
Clinical symptoms or diseases of the heart that have not been well controlled, such as: (1) NYHA grade 2 or above heart failure; (2) Unstable angina pectoris; (3) Have experienced myocardial infarction within 6 months; (4) Patients with clinically significant supraventricular or ventricular arrhythmias that require treatment or intervention;