Prophylaxis of neutropenia with mecapegfilgrastim in patients with non-myeloid malignancies in a real-world setting.

Abstract

e24072 Background: The prophylaxis of neutropenia has been evolving from short acting granulocyte colony-stimulating factors (G-CSFs) to long acting G-CSFs. The safety and effectiveness of long acting G-CSF in a real-world setting were still lacking. Methods: We performed a multi-center, non-interventional, real-world study to explore the tolerability and effectiveness of mecapegfilgrastim. Different prophylactic strategy (primary or secondary prophylaxis) were compared. The effect of mecapegfilgrastim by means of continuous administration was also explored. Results: This study included 638 patients who had complete the study from May 2019 to November 15, 2020. About half of the participants were breast cancer patients. The mean age of the patients were 56 years. The most frequently reported adverse event possibly related to study drug was white blood cell increase (6.2 %). No unexpected adverse events were reported. Overall, thirty-six (5.6 %) patients experienced grade ≥ 3 neutropenia in chemotherapy cycle one. The patients in the primary and secondary prophylaxis subgroups had incidence of grade ≥ 3 neutropenia of 4.3 % and 9.2 % in chemotherapy cycle one respectively. There was a decreasing trend of neutropenia from cycle one to cycle four when mecapegfilgrastim were administrated continuously. Conclusions: The mecapegfilgrastim was well tolerable and no unexpected adverse events were observed in real-world setting. Primary prophylaxis using mecapegfilgrastim had lower incidence of neutropenia than secondary usage.