Effectiveness and safety of empegfilgrastim (Extimia®) in patients with solid tumors receiving cytotoxic therapy: final results of the DEFENDOR study

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Aim. To evaluate the effectiveness and safety of Extimia® (empegfilgrastim, JSC "BIOCAD") in reducing the frequency, duration of neutropenia, the incidence of febrile neutropenia (FN) and infections caused by FN in patients with solid tumors receiving myelosuppressive therapy.

Materials and methods. The paper presents the final results of a multicenter prospective observational post-marketing study of the safety and effectiveness of Extimia® (empegfilgrastim) in patients with solid tumors receiving cytotoxic therapy. For the primary prevention of FN, all patients received empegfilgrastim at 7.5 mg subcutaneously once per course of chemotherapy (CT) 24 hours after the end of CT administration. The primary endpoint included an assessment of the relative dose-intensity (RDI) of the CT courses administered. The endpoints of interest included the assessment of the RDI of CT courses by nosology and CT regimen, the frequency of dose-limiting neutropenia, and the incidence of all adverse events (AEs) in patients who received at least one dose of the study medication, including serious AEs.

Results. From February 2021 to December 2022, 3218 patients with various malignancies were included in 41 study centers of the Russian Fede- ration. Of these, 3217 (99.97%) patients received at least one dose of the study drug, and 2663 (82.8%) patients were included in the RDI evaluation population according to the study protocol. The mean age in this group was 56.9 (18–84) years. RDI ≥85% was achieved in 2,415 (90.7%) patients. The mean RDI was 96.2%, with a median of 100%. FN risk factors were present in 1216 (45.7%) patients, with age ≥65 years being the most common risk factor at 761/2663 (28.6%). It should be noted that in patients younger than 65 years, the RDI was 91.5%, and in elderly patients (≥65 years) 88.7%. Dose-limiting neutropenia was reported in 19 (0.7%) patients. There were 74 cases of grade 3–4 AEs (according to CTCAE v.5) in 59 (1.8%) patients. The most common were neutropenia, anemia, and diarrhea in 19 (0.7%), 7 (0.2%), and 6 (0.2%) patients, respectively. Serious AEs were reported in 17 patients (0.5%).

Conclusion. Primary prophylaxis of FN with long-acting granulocyte colony-stimulating factor empegfilgrastim effectively maintains RDI in various nosological and therapeutic groups of patients with different CT regimens in real-world clinical practice.

作者简介

Anton Snegovoy

Lopatkin Scientific Research Institute of Urology – branch of the National Medical Research Radiological Centre

编辑信件的主要联系方式.
Email: drsneg@gmail.com
ORCID iD: 0000-0002-0170-5681

D. Sci. (Med.), Prof.

俄罗斯联邦, Moscow

Inessa Kononenko

Lopatkin Scientific Research Institute of Urology – branch of the National Medical Research Radiological Centre

Email: drsneg@gmail.com
ORCID iD: 0000-0002-7142-2986

Cand. Sci. (Med.)

俄罗斯联邦, Moscow

Irina Radiukova

Clinical Oncology Dispensary, Omsk

Email: drsneg@gmail.com

Cand. Sci. (Med.)

俄罗斯联邦, Omsk

Svetlana Orlova

Republican Clinical Oncology Dispensary, Cheboksary

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Head Department

俄罗斯联邦, Cheboksary

Alexander Sultanbaev

Republican Clinical Oncology Dispensary, Ufa

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ORCID iD: 0000-0003-0996-5995

Cand. Sci. (Med.)

俄罗斯联邦, Ufa

Daria Dubovichenko

Arkhangelsk Clinical Oncology Dispensary

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Cand. Sci. (Med.)

俄罗斯联邦, Arkhangelsk

Aleksandr Dergunov

Tver Regional Clinical Oncology Dispensary

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Aleksandra Saidullaeva

Tver Regional Clinical Oncology Dispensary

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Nadezhda Repina

Tula Regional Clinical Oncology Dispensary

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Iuliia Gronskaia

Saint Petersburg State University

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Elena Rossokha

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Botkin Hospital

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Olga Dylinova

Regional Clinical Oncology Hospital, Yaroslavl

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Liliia Kaleikina

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Iuliia Komoza

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Dmitrii Korolev

Primorsky Regional Oncology Dispensary

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Liudmila Lebedeva

Arkhangelsk Clinical Oncology Dispensary

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Andrei Lebedinets

Leningrad Regional Clinical Hospital

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Oncology Dispensary, Rostov-on-Don

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Yakutsk Republican Oncology Dispensary

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Ekaterina Solov'eva

Arkhangelsk Clinical Oncology Dispensary

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Antonina Teterich

Belgorod Oncology Dispensary

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Vladimir Timin

Komi Republican Oncology Dispensary

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Irina Tolmacheva

Briansk Regional Oncology Dispensary

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Iana Tiugina

Ivanovo Regional Oncology Dispensary

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Aleksandra Khodkevich

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Fatima Tsarakhova

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Iana Chapko

Arkhangelsk Clinical Oncology Dispensary

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Margarita Shegurova

Nizhniy Novgorod Regional Clinical Oncology Dispensary

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Tomsk Regional Oncology Dispensary

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Regional Clinical Oncology Hospital, Yaroslavl

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Elena Shumilkina

Republican Clinical Oncology Dispensary, Cheboksary

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Daria Iakuba

Tver Regional Clinical Oncology Dispensary

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Tansylu Ibragimova

Loginov Moscow Clinical Scientific Center

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Polina Feoktistova

Loginov Moscow Clinical Scientific Center

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ORCID iD: 0000-0002-0340-7119

Cand. Sci. (Med.)

俄罗斯联邦, Moscow

Irina Sorokina

Loginov Moscow Clinical Scientific Center; JSC "Biocad"

Email: drsneg@gmail.com

Cand. Sci. (Biol.), Loginov Moscow Clinical Scientific Center, JSC "Biocad"

俄罗斯联邦, Moscow; Saint Petersburg

Anna Berezina

Russian Academy of National Economy and Public Administration of the President of the Russian Federation

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independent expert of research projects

俄罗斯联邦, Moscow

Polina Kiseleva

JSC "Biocad"

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technical support specialist

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Olga Mironenko

Russian Academy of National Economy and Public Administration of the President of the Russian Federation

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Cand. Sci. (Econ.)

俄罗斯联邦, Moscow

Oxana Prosianikova

JSC "Biocad"

Email: drsneg@gmail.com
ORCID iD: 0009-0005-3684-6301

Cand. Sci. (Med.)

俄罗斯联邦, Saint Petersburg

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1. JATS XML
2. Fig. 1. Distribution of patients by malignancy location in the RDI evaluation population, abs. (%).

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