A Study to Compare the Pharmacokinetics, Pharmacodynamics, Immunogenicity, Safety and Tolerability of Filgrastim Biosimilar and Neupogen Reference Product in Healthy Volunteers
FIL-BIO-IMG
A Randomised, Double-blind, Single-Dose, Two-way Crossover Study to Compare the PK and PD, Immunogenicity, Safety and Tolerability of Filgrastim Biosimilar and Neupogen Reference Product in Healthy Volunteers
Planned date reported by the registry; this milestone is not confirmed as achieved.
Primary Completion
April 7, 2027
Estimated
Planned date reported by the registry; this milestone is not confirmed as achieved.
Study Completion
May 21, 2027
Estimated
Planned date reported by the registry; this milestone is not confirmed as achieved.
Brief Summary
The goal of this clinical trial is to assess the pharmacokinetic similarity of Biofilgragen, a filgrastim biosimilar, compared with EU-authorized Neupogen after single subcutaneous doses in healthy adult volunteers. The main questions it aims to answer are:
Are the maximum observed serum concentration (Cmax) and area under the serum concentration-time curve from time zero to infinity (AUC0-∞) of filgrastim similar between Biofilgragen and EU-authorized Neupogen?
What is the time to reach maximum observed serum concentration (tmax) and terminal elimination half-life (t½) following administration of each product? Researchers will compare Biofilgragen and EU-authorized Neupogen to assess pharmacokinetic similarity. Participants will:
Receive a single 5 μg/kg subcutaneous dose of Biofilgragen and a single 5 μg/kg subcutaneous dose of EU-Neupogen in a randomized sequence during two treatment periods.
Receive each study product after an overnight fast, with the two treatment periods separated by a minimum 32-day washout period.
Provide blood samples at predefined time points after each dose to measure serum filgrastim concentrations and determine pharmacokinetic parameters.
Undergo safety assessments and monitoring throughout the study, including the follow-up period.
Registry Overview
Registry-reported information. Elapsed time and enrollment totals alone do not measure study progress or recruitment pace.
Recruitment status
not yet recruiting
Estimated enrollment
50 participants
Study completion date
May 21, 2027
Estimated
Planned date reported by the registry; this milestone is not confirmed as achieved.
Listed locations
0 countries · 0 sites
Trial Relationships
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Study Timeline
Dates and qualifiers reported by the registry. Estimated dates do not confirm that a milestone has occurred.
First Submitted
October 4, 2026
Actual (reported)
First Posted
October 16, 2026
Actual (reported)
Study Start
December 15, 2026
Estimated
Planned date reported by the registry; this milestone is not confirmed as achieved.
Primary Completion
April 7, 2027
Estimated
Planned date reported by the registry; this milestone is not confirmed as achieved.
Study Completion
May 21, 2027
Estimated
Planned date reported by the registry; this milestone is not confirmed as achieved.
Maximum observed serum filgrastim concentration (Cmax)
To compare the maximum observed serum filgrastim concentration (Cmax) following administration of Biofilgragen (test product) and EU-authorized Neupogen (reference product). Serum filgrastim concentrations will be measured using a validated enzyme-linked immunosorbent assay (ELISA) from serial blood samples collected at the protocol-specified pharmacokinetic sampling time points. Cmax will be derived using non-compartmental analysis. Pharmacokinetic similarity will be assessed using the two-sided 90% confidence interval for the test-to-reference geometric mean ratio, with acceptance limits of 80% to 125%.
Pre-dose (-0.5 h) and 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 10, 12, 16, and 24 hours post-dose, in each treatment period.
Time to reach maximum observed serum filgrastim concentration (tmax) (hours)
To determine the time to reach the maximum observed serum filgrastim concentration (tmax) following administration of Biofilgragen and EU-authorized Neupogen. The parameter will be derived from the serum concentration-time profile using non-compartmental analysis and expressed in hours. Results will be summarized descriptively.
Pre-dose (-0.5 h) and 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 10, 12, 16, and 24 hours post-dose, in each treatment period.
Area under the serum filgrastim concentration-time curve from time zero to infinity (AUC0-inf)
To compare the area under the serum filgrastim concentration-time curve from time zero extrapolated to infinity (AUC0-inf) following administration of Biofilgragen and EU-authorized Neupogen. The parameter will be calculated from serial serum concentration measurements using non-compartmental analysis. Pharmacokinetic similarity will be assessed using the two-sided 90% confidence interval for the test-to-reference geometric mean ratio, with acceptance limits of 80% to 125%.
Pre-dose (-0.5 h) and 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 10, 12, 16, and 24 hours post-dose, in each treatment period; AUC extrapolated to infinity.
Terminal elimination half-life of serum filgrastim (t½) (hours)
To determine the terminal elimination half-life (t1/2) of serum filgrastim following administration of Biofilgragen and EU-authorized Neupogen. The parameter will be derived from the serum concentration-time profile using non-compartmental analysis and expressed in hours. Results will be summarized descriptively.
Pre-dose (-0.5 h) and 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 10, 12, 16, and 24 hours post-dose, in each treatment period.
Secondary Outcomes (19)
Maximum observed absolute neutrophil count (ANCmax) (cells/µL)
Pre-dose (-0.5 h) and 4, 8, 10, 12, 16, 24, 36, 48, 72, and 96 hours post-dose, in each treatment period.
Time to maximum observed absolute neutrophil count (time to ANCmax) (hours)
Pre-dose (-0.5 h) and 4, 8, 10, 12, 16, 24, 36, 48, 72, and 96 hours post-dose, in each treatment period.
Area under the absolute neutrophil count-time curve from time zero to 96 hours (AUEC0-96h)
Pre-dose (-0.5 h) and 4, 8, 10, 12, 16, 24, 36, 48, 72, and 96 hours post-dose, in each treatment period.
Incidence of treatment-emergent anti-drug antibodies (ADA)
Predose in Treatment Period 1 (baseline), predose in Treatment Period 2, and at the final Follow-up visit (Day 69 + 7 days).
Incidence of neutralizing antibodies (NAb)
Predose in Treatment Period 1 (baseline), predose in Treatment Period 2, and at the final Follow-up visit (Day 69 + 7 days).
Study Arms (2)
TR
EXPERIMENTAL
Participants randomized to this sequence will receive a single subcutaneous dose of Biofilgragen (Test) during Period 1, followed by a single subcutaneous dose of EU-authorized Neupogen (Reference/active comparator) during Period 2, with the specified washout period between treatments.
Drug: BiofilgragenDrug: Neupogen (filgrastim)
RT
EXPERIMENTAL
Participants randomized to this sequence will receive a single subcutaneous dose of EU-authorized Neupogen (Reference/active comparator) during Period 1, followed by a single subcutaneous dose of Biofilgragen (Test) during Period 2, with the specified washout period between treatments.
Biofilgragen is a filgrastim biosimilar and recombinant human granulocyte colony-stimulating factor (G-CSF). It will be administered as a single subcutaneous injection at a dose of 5 mcg/kg. Biofilgragen is intended to mirror the reference product in amino acid sequence, formulation, route of administration, and dosing schedule and to engage the same G-CSF receptor-mediated mechanisms.
PARTICIPANT, CARE PROVIDER, INVESTIGATOR, OUTCOMES ASSESSOR
Masking Details
A blinded, trained administrator will give the injection. Laboratory and PK/PD/immunogenicity analysts, and the sponsor study team will remain blinded to treatment allocation throughout the study.
Purpose
OTHER
Intervention Model
CROSSOVER
Model Details: Randomized, double blind, single dose, 2 sequence, 2 period (two way crossover) trial in healthy volunteers, conducted as a biosimilarity type PK comparison (within participant design).
Neupogen is the EU-authorized reference medicinal product containing filgrastim. It will be administered as a single subcutaneous injection at a dose of 5 mcg/kg under the same conditions as Biofilgragen. It serves as the active comparator for the biosimilar comparison and has well-characterized pharmacokinetic, pharmacodynamic, safety, and immunogenicity profiles.
RTTR
Male or female, 18 to 55 years of age at the time of signing the informed consent.
BMI between 18.0 and 30.0 kg/m².
Body weight 50-110 kg.
Healthy as determined by medical history, physical examination, vital signs, 12-lead ECG, laboratory assessments (biochemistry, hematology, urinalysis), and other screening evaluations, as applicable, with results within reference ranges or judged not clinically significant by the Investigator.
Hematology parameters, including absolute neutrophil count (ANC), hemoglobin, platelet count, and total white blood cell (WBC) count, within the laboratory reference ranges or considered clinically acceptable by the Investigator at screening.
Female participants of childbearing potential must use highly effective contraception (e.g., intrauterine device, hormonal implant, or a combined hormonal contraceptive) starting at least 4 weeks before first dosing and continuing until 4 weeks after the last study drug administration.
Female participants of non childbearing potential must be either post menopausal (≥12 consecutive months of amenorrhea) or surgically sterile.
You may not qualify if:
Pregnant or breastfeeding females.
Known hypersensitivity to filgrastim, other G-CSF products, Escherichia coli-derived proteins, or any excipient of the study drugs.
Known latex allergy.
Known history or suspected Hereditary Fructose Intolerance (HFI).
Known history, diagnosis, or screening evidence of clinically significant Sickle Cell Disorder.
Any clinically significant history or presence of cardiovascular, renal, pulmonary, neurological, musculoskeletal, hepatic, gastrointestinal, endocrinological, metabolic or psychiatric disease.
Any clinically significant history or presence of hematologic disease (e.g., leukemia, myelodysplastic syndrome, aplastic anemia, chronic neutropenia, thrombocytopenia, coagulopathy).
History or presence of clinically significant splenomegaly, splenic rupture, or splenectomy at screening.
History or presence of clinically significant respiratory or pulmonary disease (such as moderate-to-severe asthma, COPD, interstitial lung disease, pulmonary hypertension, acute respiratory distress syndrome \[ARDS\], or pulmonary hemorrhage) at screening.
History or presence of clinically significant systemic autoimmune or chronic inflammatory disease (such as systemic lupus erythematosus, rheumatoid arthritis, inflammatory bowel disease, vasculitis, or autoimmune thyroid disease requiring systemic therapy).
History of alcohol abuse within 12 months prior to screening.
Smokers who consume more than 10 cigarettes per day (or equivalent nicotine products).
Receipt of any live or live-attenuated vaccine (e.g., MMR, varicella, yellow fever, oral typhoid) within 28 days prior to first study drug administration, or any inactivated, subunit, mRNA, or non-live vaccine (e.g., seasonal influenza, hepatitis A/B, tetanus, COVID-19) within 14 days prior to the first study drug administration.
Positive test results for drugs of abuse screening in urine at screening or before each treatment period.
Positive test results at screening for hepatitis B surface antigen (HBsAg, serum), or combined HIV antigen/antibody (HIV Ag-Ab, serum). Participants with a positive hepatitis C virus antibody (HCV Ab, serum) result will undergo confirmatory PCR testing and may be eligible if the PCR result is negative.
Planned date reported by the registry; this milestone is not confirmed as achieved.
Primary Completion
April 7, 2027
Estimated
Planned date reported by the registry; this milestone is not confirmed as achieved.
Study Completion
May 21, 2027
Estimated
Planned date reported by the registry; this milestone is not confirmed as achieved.
Last Updated
October 20, 2026
Record last verified: 2026-10
Data Sharing
IPD Sharing
Will not share
Source record
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