A Multicenter, Open-label Phase II Clinical Study Evaluating the Pharmacokinetics, Pharmacodynamics, Safety, and Efficacy of Albipagrastim Alfa for Injection (QLC2519) in Pediatric Solid Tumor Participants
QLC2519 (Mai Li Sheng®) is a new protein drug created by fusing the N-terminal of highly active modified G-CSF with the C-terminal of HSA. The modified G-CSF retained high activity while reducing affinity for the G-CSF receptor, which can significantly inhibit the the G-CSF receptor-mediated (RMC) pathway. The aim of this study is to evaluate the PK/PD characteristics of QLC2519 in preventing chemotherapy-induced neutropenia (CIN) in children with sarcoma.
• Age 0-18 years (excluding boundary values), any gender;
• Participant diagnosed with pediatric sarcoma based on pathological histology;
• Participant was suitable for receiving the VDC/IE chemotherapy regimen, and planning to receive at least 3 chemotherapy cycles (VDC: vincristine, doxorubicin, cyclophosphamide; IE: ifosfamide, etoposide);
• ECOG ≤1;
• Expected survival ≥3 months, and expected to complete the 3 chemotherapy cycles specified in the regimen;
• Hematology, liver function, and renal function before the first administration of chemotherapy drugs meet the following requirements:
• Hematology: absolute neutrophil count (ANC) in peripheral blood ≥2.0×10\^9/L (or above the lower limit of normal); platelet count (PLT) ≥100×10\^9/L; hemoglobin (HGB) ≥90 g/L; white blood cell count (WBC) ≥4.0×10\^9/L;
• Liver function: total bilirubin (TBIL) ≤1.5×ULN, alanine aminotransferase (ALT) and aspartate aminotransferase (AST) ≤1.5×ULN; for patients with liver metastasis, ALT and AST ≤2.5×ULN;
• Renal function: serum creatinine (Cr) ≤1.5×ULN or creatinine clearance rate (CCr) ≥60 mL/min;
• Normal bone marrow hematopoietic function, no bleeding tendency (INR \<1.5);
• Female participants of potential reproductive ability (post-menarche) are neither pregnant nor breastfeeding; participants of potential reproductive ability (e.g., females post-menarche or males post-spermarche) must agree to use effective contraception from the time of signing the informed consent until at least 3 months after the last administration.