A Study to Compare the Pharmacokinetics, Pharmacodynamics, Immunogenicity, Safety and Tolerability of Filgrastim Biosimilar and Neupogen Reference Product in Healthy Volunteers

NCT07877467 — Phase 1, Not yet recruiting, 50 participants, BioGeneric Pharma

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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

RegistryNCT07877467, acronym FIL-BIO-IMG
StatusNot yet recruiting
PhasePhase 1
Study typeInterventional; randomized, crossover, masking: quadruple, other
Enrollment50 (Estimated)
SponsorBioGeneric Pharma (Industry)
ConditionsNeutropenia (Low White Blood Cell Count)
InterventionsBiofilgragen, Neupogen (filgrastim) (Drug)
Datesstart 2026-12-15 (estimated), primary completion 2027-04-07 (estimated), completion 2027-05-21 (estimated), first posted 2026-10-16, last updated 2026-10-20

Related Papers Related Patents Related Grants Related Experts
All trials for Neutropenia (Low White Blood Cell Count) All trials of Biofilgragen All trials of Neupogen (filgrastim)

-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.

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+Arms and interventions

ArmTypeInterventionsDescription
TRExperimentalDrug: Biofilgragen; Drug: Neupogen (filgrastim)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.
RTExperimentalDrug: Biofilgragen; Drug: Neupogen (filgrastim)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 (Drug): 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.
  • Neupogen (filgrastim) (Drug): 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.

+Outcome measures

Primary outcomes

  • Maximum observed serum filgrastim concentration (Cmax) [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.]: 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%.
  • Time to reach maximum observed serum filgrastim concentration (tmax) (hours) [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.]: 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.
  • Area under the serum filgrastim concentration-time curve from time zero to infinity (AUC0-inf) [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.]: 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%.
  • Terminal elimination half-life of serum filgrastim (t½) (hours) [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.]: 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.

Secondary outcomes

  • 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.]: To compare the maximum observed absolute neutrophil count (ANCmax) following administration of Biofilgragen and EU-authorized Neupogen. ANC will be measured using a validated automated hematology analyzer, and ANCmax will be derived from serial ANC measurements collected at the protocol-specified pharmacodynamic sampling time points.
  • 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.]: To determine the time to reach the maximum observed absolute neutrophil count (tmax, ANC) following administration of Biofilgragen and EU-authorized Neupogen. The parameter will be derived from serial ANC measurements and expressed in hours.
  • 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.]: To compare the area under the absolute neutrophil count-time curve from time zero to 96 hours post-dose (AUEC0-96h) following administration of Biofilgragen and EU-authorized Neupogen. The parameter will be calculated from serial ANC measurements collected during the 96-hour post-dose assessment 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).]: To evaluate the incidence of treatment-emergent anti-drug antibodies (ADA) against filgrastim following administration of Biofilgragen and EU-authorized Neupogen. Treatment-emergent ADA will be defined as a negative baseline ADA result followed by one or more confirmed positive ADA results after treatment. ADA will be assessed using the study-specified validated immunogenicity testing method. Results will be summarized by the number and percentage of participants meeting the definition.
  • 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).]: To evaluate the incidence of neutralizing antibodies (NAb) against filgrastim following administration of Biofilgragen and EU-authorized Neupogen. NAb testing will be performed for confirmed ADA-positive samples, where applicable, using the study-specified neutralizing antibody assay. Results will be summarized by the number and percentage of participants with detected neutralizing antibodies.
  • Incidence, severity, and relationship to study treatment of adverse events (AEs) [From signing the Informed Consent Form through the final Follow-up visit (Day 69 + 7 days).]: To evaluate the incidence, severity, and relationship to study treatment of adverse events (AEs) following administration of Biofilgragen and EU-authorized Neupogen. AEs will be recorded, assessed, and classified according to the study protocol, including assessment of severity and relationship to study treatment. Events will be coded using the Medical Dictionary for Regulatory Activities (MedDRA), Version 29.0. Results will be summarized by the number and percentage of participants experiencing AEs, with severity and relationship reported as applicable.
  • Incidence, severity, and relationship to study treatment of serious adverse events (SAEs) [From signing the Informed Consent Form through the final Follow-up visit (Day 69 + 7 days).]: To evaluate the incidence, severity, and relationship to study treatment of serious adverse events (SAEs) following administration of Biofilgragen and EU-authorized Neupogen. SAEs will be recorded, assessed, and classified according to the study protocol and coded using the Medical Dictionary for Regulatory Activities (MedDRA), Version 29.0. Results will be summarized by the number and percentage of participants experiencing SAEs, with severity and relationship to study treatment reported as applicable.
  • Incidence of adverse events of special interest (AESIs) [From signing the Informed Consent Form through the final Follow-up visit (Day 69 + 7 days).]: To evaluate the incidence of adverse events of special interest (AESIs), including splenic events, pulmonary events, capillary leak syndrome, vasculitis, glomerulonephritis, and hypersensitivity reactions. AESIs will be recorded and assessed according to the study protocol and coded using the Medical Dictionary for Regulatory Activities (MedDRA), Version 29.0. Results will be summarized by the number and percentage of participants experiencing AESIs.
  • Physical examination findings [Screening, Treatment Periods 1 and 2, and at the final Follow-up visit (Day 69 + 7 days).]: To assess physical examination findings following the protocol-specified complete physical examination, covering general appearance; head, eyes, ears, nose, and throat; cardiovascular, respiratory, abdominal, musculoskeletal, neurologic, and skin systems. Findings will be documented and clinically significant abnormalities will be evaluated according to the study protocol.
  • Change in Systolic Blood Pressure from Baseline (mmHg) [Screening, Treatment Periods 1 and 2, and at the final Follow-up (Day 69 + 7 days).]: To evaluate systolic blood pressure following administration of Biofilgragen and EU-authorized Neupogen. Systolic blood pressure will be measured using the protocol-specified standardized vital-sign assessment procedure and recorded in millimeters of mercury (mmHg). Changes and clinically significant findings will be assessed according to the study protocol.
  • Change in Diastolic Blood Pressure from Baseline (mmHg) [Screening, Treatment Periods 1 and 2, and at the final Follow-up (Day 69 + 7 days).]: To evaluate diastolic blood pressure following administration of Biofilgragen and EU-authorized Neupogen. Diastolic blood pressure will be measured using the protocol-specified standardized vital-sign assessment procedure and recorded in millimeters of mercury (mmHg). Changes and clinically significant findings will be assessed according to the study protocol.
  • Change in Heart Rate from Baseline (beats/minute) [Screening, Treatment Periods 1 and 2, and at the final Follow-up (Day 69 + 7 days).]: To evaluate heart rate following administration of Biofilgragen and EU-authorized Neupogen. Heart rate will be measured using the protocol-specified standardized vital-sign assessment procedure and recorded in beats per minute. Changes and clinically significant findings will be assessed according to the study protocol.
  • Change in Respiratory Rate from Baseline (breaths/minute) [Screening, Treatment Periods 1 and 2, and at the final Follow-up (Day 69 + 7 days).]: To evaluate respiratory rate following administration of Biofilgragen and EU-authorized Neupogen. Respiratory rate will be measured using the protocol-specified standardized vital-sign assessment procedure and recorded in breaths per minute. Changes and clinically significant findings will be assessed according to the study protocol.
  • Change in Body Temperature from Baseline (°C) [Screening, Treatment Periods 1 and 2, and at the final Follow-up (Day 69 + 7 days).]: To evaluate body temperature following administration of Biofilgragen and EU-authorized Neupogen. Body temperature will be measured using the protocol-specified vital-sign assessment procedure and recorded in degrees Celsius (°C). Changes and clinically significant findings will be assessed according to the study protocol.
  • 12-lead resting electrocardiogram (ECG) findings [Screening and at the final Follow-up visit (Day 69 + 7 days).]: To assess cardiac findings using a 12-lead resting electrocardiogram (ECG) performed according to the study protocol. ECG findings will be reviewed and documented, and clinically significant abnormalities will be evaluated by the Investigator.
  • Chest X-Ray Findings [Screening and at the final Follow-up visit (Day 69 + 7 days).]: To assess pulmonary findings using chest X-ray examinations performed according to the study protocol. Findings will be reviewed and documented, and clinically significant abnormalities will be evaluated by the Investigator.
  • Abdominal ultrasound findings, including spleen assessment [Screening, within 7 days prior to dosing in Treatment Period 2 and at the final Follow-up visit (Day 69 + 7 days).]: To assess abdominal ultrasound findings, including spleen assessment, using the protocol-specified ultrasonography examination. Findings will be reviewed and documented, and clinically significant abnormalities will be evaluated by the Investigator.
  • Changes in Clinical Laboratory Parameters from Baseline [Screening, within 7 days prior to dosing in Treatment Period 2 and at the final Follow-up visit (Day 69 + 7 days).]: To evaluate changes in clinical laboratory parameters from baseline following administration of Biofilgragen and EU-authorized Neupogen. Clinical laboratory assessments will include: 1. Hematology: Hemoglobin, Hematocrit, MCH, MCHC, MCV, RBC, Platelet Count, WBC Count, and Differential WBCs. 2. Renal Function: Urea, Creatinine, BUN, and Uric Acid. 3. Electrolytes: Sodium and Potassium. 4. Liver Function: GGT, ALT, AST, Bilirubin, Alkaline Phosphatase, Total Bilirubin, and Direct Bilirubin. 5. Bone and Protein Metabolism: Calcium, Total Protein, and Albumin. 6. Other Laboratory Parameters: Random Blood Glucose, Cholesterol, FT4, and TSH. 7. Urinalysis: Colour, Aspect, pH, Specific Gravity, Glucose, Ketone Bodies, Bilirubin, Urobilinogen, Albumin, Pus Cells, Red Blood Cells, Epithelial Cells, Crystals, Amorphous Materials, Casts, Parasites, and Yeast Cells.
  • Local tolerability at injection site [Following each study treatment administration during both treatment periods, with follow-up of any reported injection-site reactions through the final follow-up visit on Day 69 (±7 days).]: To evaluate local tolerability at the injection site following administration of Biofilgragen and EU-authorized Neupogen. Injection-site reactions will be assessed and recorded according to the study protocol. Reported injection-site reactions will be followed through the final Follow-up visit.

+Eligibility

Sex: All, ages: 18 Years to 55 Years, accepts healthy volunteers

Inclusion Criteria:

1. Able and willing to provide written, dated informed consent prior to any study specific procedures.
2. Able to comply with study procedures and visits for the entire study duration.
3. Male or female, 18 to 55 years of age at the time of signing the informed consent.
4. BMI between 18.0 and 30.0 kg/m².
5. Body weight 50-110 kg.
6. 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.
7. 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.
8. 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.
9. Female participants of non childbearing potential must be either post menopausal (≥12 consecutive months of amenorrhea) or surgically sterile.

Exclusion Criteria:

1. Pregnant or breastfeeding females.
2. Known hypersensitivity to filgrastim, other G-CSF products, Escherichia coli-derived proteins, or any excipient of the study drugs.
3. Known latex allergy.
4. Known history or suspected Hereditary Fructose Intolerance (HFI).
5. Known history, diagnosis, or screening evidence of clinically significant Sickle Cell Disorder.
6. Any clinically significant history or presence of cardiovascular, renal, pulmonary, neurological, musculoskeletal, hepatic, gastrointestinal, endocrinological, metabolic or psychiatric disease.
7. Any clinically significant history or presence of hematologic disease (e.g., leukemia, myelodysplastic syndrome, aplastic anemia, chronic neutropenia, thrombocytopenia, coagulopathy).
8. History or presence of clinically significant splenomegaly, splenic rupture, or splenectomy at screening.
9. 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.
10. 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).
11. History of alcohol abuse within 12 months prior to screening.
12. Smokers who consume more than 10 cigarettes per day (or equivalent nicotine products).
13. 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.
14. Positive test results for drugs of abuse screening in urine at screening or before each treatment period.
15. 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.
16. Positive pregnancy test for females of childbearing potential at screening or before each treatment period.
17. Whole blood donation more than 400 mL or significant acute blood loss within 8 weeks prior to screening.
18. Plasma, platelet, or apheresis donation within 4 weeks prior to screening.
19. Prior use of granulocyte colony-stimulating factor (G-CSF), granulocyte-macrophage colony-stimulating factor (GM-CSF), or other hematopoietic growth factors within 3 months prior to the first study drug administration.
20. Prior use of erythropoiesis-stimulating agents within 3 months prior to the first study drug administration.
21. Use of systemic corticosteroids or other immunosuppressants within 30 days prior to the first study drug administration.
22. Prior use of biological immunomodulators (such as tumor necrosis factor \[TNF\] inhibitors) within 3 months or 5 elimination half-lives (whichever is longer) prior to the first study drug administration.
23. Prior use of cytotoxic or antimetabolite agents within 30 days prior to the first study drug administration.
24. Participation in another interventional clinical trial involving administration of an investigational medicinal product, or receipt of an investigational medicinal product, within 90 days or 5 elimination half-lives (whichever is longer) prior to the first study drug administration
25. Use of any other prescription or OTC medication, herbal product, vitamin, or dietary supplement that, in the Investigator's judgment, may affect hematopoiesis, immune function, filgrastim pharmacokinetics/pharmacodynamics, or study safety assessments within 14 days or 5 elimination half-lives (whichever is longer) prior to the first study drug administration.
26. Any psychiatric, cognitive, or other condition that, in the investigator's opinion, could compromise the participant's ability to give truly informed consent, comply with study procedures, or safely complete the study.
27. Any other condition or circumstance that, in the Investigator's medical judgment, renders the participant unsuitable for participation in the study.