Evaluating the Safety and Efficacy of Romiplostim (AMG 531) in Thrombocytopenic Subjects With Immune Thrombocytopenic Purpura (ITP)
20. december 2019 opdateret af: Amgen
A Dose-finding Study Evaluating the Safety and Efficacy of AMG 531 in Thrombocytopenic Subjects With Immune Thrombocytopenic Purpura (ITP)
The primary objective of this study is to evaluate the safety and tolerability of romiplostim in thrombocytopenic patients with ITP.
Studieoversigt
Status
Afsluttet
Betingelser
Intervention / Behandling
Undersøgelsestype
Interventionel
Tilmelding (Faktiske)
45
Fase
- Fase 2
Deltagelseskriterier
Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.
Berettigelseskriterier
Aldre berettiget til at studere
18 år til 65 år (Voksen, Ældre voksen)
Tager imod sunde frivillige
Ingen
Køn, der er berettiget til at studere
Alle
Beskrivelse
Inclusion Criteria:
- Diagnosis of ITP according to American Society of Hematology (ASH) guidelines at least 3 months before enrollment
- Have completed at least 1 prior treatment for ITP
Two (including day -2) of the 3 platelet counts taken during the screening and pre-treatment periods must have fulfilled the following:
- less than 30 x 10^9/L for those subjects not receiving any ITP therapy,
- less than 50 x 10^9/L for those subjects receiving any ITP therapy
- Eastern Cooperative Oncology Group performance status of 0 to 2
- Serum creatinine concentration ≤ 2 mg/dL (≤ 176.8 µmol/L)
- Adequate liver function, as evidenced by a serum bilirubin ≤ 1.5 times the laboratory normal range
- Hemoglobin greater than 10.0 g/dL
- Written informed consent
Exclusion Criteria:
- Considered a substantial risk for adverse outcomes because of a clinically important trend (as determined by the investigator) detected in the platelet counts during the screening period
- Any known history of bone marrow stem cell disorder
- Any active malignancy. If prior history of cancer other than basal cell carcinoma or cervical carcinoma in situ, no treatment or active disease within 5 years before randomization
- Documented diagnosis of arterial thrombosis (ie, stroke, transient ischemic attack, or myocardial infarction) in the previous year; history of venous thrombosis (ie, deep vein thrombosis, pulmonary embolism) and receiving anticoagulation therapy
- Unstable or uncontrolled disease or condition related to or impacting cardiac function (e.g., unstable angina, congestive heart failure [New York Heart Association (NYHA) greater than class II], uncontrolled hypertension [diastolic greater than 100 mmHg] or cardiac arrhythmia)
- Have 3 or more of the following predisposing factors for thromboembolic events: diabetes; smoker using oral contraceptives; hypercholesteremia (> 240 mg/dL); treatment for hypertension
- Known positive test for human immunodeficiency virus (HIV) infection or hepatitis C virus
- Received any treatment for ITP (except for a constant dose schedule of corticosteroids) within 4 weeks before the screening visit
- Received intravenous (IV) immunoglobulin (Ig) or WinRho within 2 weeks before the screening visit
- Received hematopoietic growth factors, including interleukin (IL)-11 (Neumega®) within 4 weeks before the screening visit
- Past or present participation in any study evaluating polyethylene glycol recombinant human magakaryopoiesis differentiating factor (PEG-rHuMGDF), recombinant human thrombopoietin (rHuTPO), or related platelet product
- Received any alkylating agents within 8 weeks before the screening visit or anticipated use during the time of the proposed study
- Received any monoclonal antibody (eg, rituximab) within 16 weeks before the screening visit or anticipated use during the time of the proposed study
- Less than 4 weeks since receipt of any therapeutic drug or device that is not FDA approved for any indication before the screening period
- Less than 2 months since major surgery (including laparoscopic splenectomy)
- Pregnant or breast feeding
- Subjects of reproductive potential who are not using adequate contraceptive precautions, in the judgment of the investigator
Studieplan
Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Behandling
- Tildeling: Randomiseret
- Interventionel model: Sekventiel tildeling
- Maskning: Dobbelt
Våben og indgreb
Deltagergruppe / Arm |
Intervention / Behandling |
|---|---|
|
Eksperimentel: Part A: Romiplostim 0.2 µg/kg
Participants received 0.2 µg/kg romiplostim subcutaneously on day 1 and day 15 or 22, depending on platelet counts.
|
Administered by subcutaneous injection
Andre navne:
|
|
Eksperimentel: Part A: Romiplostim 0.5 µg/kg
Participants received 0.5 µg/kg romiplostim subcutaneously on day 1 and day 15 or 22, depending on platelet counts.
|
Administered by subcutaneous injection
Andre navne:
|
|
Eksperimentel: Part A: Romiplostim 1.0 µg/kg
Participants received 1.0 µg/kg romiplostim subcutaneously on day 1 and on day 15 or 22 depending on platelet counts.
|
Administered by subcutaneous injection
Andre navne:
|
|
Eksperimentel: Part A: Romiplostim 3 µg/kg
Participants received 3.0 µg/kg romiplostim subcutaneously on day 1 and day 15 or 22, depending on platelet counts.
|
Administered by subcutaneous injection
Andre navne:
|
|
Eksperimentel: Part A: Romiplostim 6 µg/kg
Participants received 6.0 µg/kg romiplostim subcutaneously on day 1 and day 15 or 22, depending on platelet counts.
|
Administered by subcutaneous injection
Andre navne:
|
|
Eksperimentel: Part A: Romiplostim 10 µg/kg
Participants received 10.0 µg/kg romiplostim subcutaneously on day 1 and day 15 or 22, depending on platelet counts.
|
Administered by subcutaneous injection
Andre navne:
|
|
Placebo komparator: Part B: Placebo
Participants received placebo subcutaneously once a week for 6 weeks.
|
Indgives ved subkutan injektion
|
|
Eksperimentel: Part B: Romiplostim 1.0 µg/kg
Participants received 1.0 µg/kg subcutaneously once a week for 6 weeks.
|
Administered by subcutaneous injection
Andre navne:
|
|
Eksperimentel: Part B: Romiplostim 3.0 µg/kg
Participants received 3.0 µg/kg subcutaneously once a week for 6 weeks.
|
Administered by subcutaneous injection
Andre navne:
|
|
Eksperimentel: Part B: Romiplostim 6.0 µg/kg
Participants received 6.0 µg/kg subcutaneously once a week for 6 weeks.
|
Administered by subcutaneous injection
Andre navne:
|
Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Number of Participants With Adverse Events
Tidsramme: From first dose of study drug through 8 weeks (Part A) or 6 weeks (Part B) after last dose of study drug; 78 days
|
From first dose of study drug through 8 weeks (Part A) or 6 weeks (Part B) after last dose of study drug; 78 days
|
|
|
Number of Participants With Anti-romiplostim or Anti-endogenous Thrombopoietin Neutralizing Antibodies
Tidsramme: Assessed on day 29 (Part A only), day 43 (Part B only), and day 78
|
The development of antibodies to romiplostim or to endogenous thrombopoietin (eTPO) was assessed using a neutralizing bioassay.
Participants positive for neutralizing antibodies at any of the assessments during the study are reported.
|
Assessed on day 29 (Part A only), day 43 (Part B only), and day 78
|
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Number of Participants Who Achieved Targeted Therapeutic Platelet Level in Part A
Tidsramme: After first dose (day 1 to day 15 or 22) and after second dose (day 15 or 22 to day 78)
|
Targeted therapeutic platelet level was defined as a doubling of baseline platelet counts and between 50 to 450 x 10⁹ cells/L. Platelet count data after the use of rescue medication were not included; participants with no platelet count data were considered non-responders. |
After first dose (day 1 to day 15 or 22) and after second dose (day 15 or 22 to day 78)
|
|
Number of Participants With an Increase in Platelet Count of ≥ 20 x 10⁹ Cells/L Over Baseline in Part A
Tidsramme: After first dose (day 1 to day 15 or 22), and after second dose (day 15 or 22 to day 78)
|
Platelet count data after the use of rescue medication were not included; participants with no platelet count data were considered non-responders.
|
After first dose (day 1 to day 15 or 22), and after second dose (day 15 or 22 to day 78)
|
|
Number of Participants With a Peak Platelet Count ≥ 100 x 10⁹ Cells/L in Part A
Tidsramme: After first dose (day 1 to day 15 or 22) and after second dose (day 15 or 22 to day 78)
|
Platelet count data after the use of rescue medication were not included; participants with no platelet count data were considered non-responders.
|
After first dose (day 1 to day 15 or 22) and after second dose (day 15 or 22 to day 78)
|
|
Number of Participants With a Peak Platelet Count of > 450 x 10⁹ Cells/L in Part A
Tidsramme: After first dose (day 1 to day 15 or 22) and after second dose (day 15 or 22 to day 78)
|
Platelet count data after the use of rescue medication were not included; participants with no platelet count data were considered non-responders.
|
After first dose (day 1 to day 15 or 22) and after second dose (day 15 or 22 to day 78)
|
|
Peak Platelet Count After Each Dose in Part A
Tidsramme: After first dose (day 1 to day 15 or 22) and after second dose (day 15 or 22 to day 78)
|
Platelet count data after the use of rescue medication were not included.
|
After first dose (day 1 to day 15 or 22) and after second dose (day 15 or 22 to day 78)
|
|
Change From Baseline in Peak Platelet Count After Each Dose in Part A
Tidsramme: Baseline and after first dose (day 1 to day 15 or 22) and after second dose (day 15 or 22 to day 78)
|
Platelet count data after the use of rescue medication were not included.
|
Baseline and after first dose (day 1 to day 15 or 22) and after second dose (day 15 or 22 to day 78)
|
|
Time to Peak Platelet Count After Each Dose in Part A
Tidsramme: After first dose (day 1 to day 15 or 22) and after second dose (day 15 or 22 to day 78)
|
Platelet count data after the use of rescue medication were not included.
|
After first dose (day 1 to day 15 or 22) and after second dose (day 15 or 22 to day 78)
|
|
Duration Within the Targeted Therapeutic Platelet Range In Part A
Tidsramme: After first dose (day 1 to day 15 or 22) and after second dose (day 15 or 22 to day 78)
|
Targeted therapeutic platelet level was defined as a platelet count that was double the baseline level and ≥ 50 and ≤ 450 × 10⁹ cells/L. Platelet count data after the use of rescue medication were not included. |
After first dose (day 1 to day 15 or 22) and after second dose (day 15 or 22 to day 78)
|
|
Percentage of Participants Who Achieved Targeted Therapeutic Platelet Level In Part B
Tidsramme: Day 1 to day 78
|
Targeted therapeutic platelet level was defined as a doubling of baseline platelet counts and within the range of greater than or equal to 50 x 10⁹ cells/L and less than or equal to 450 x 10⁹ cells/L. Platelet count data after use of rescue medication were not included in the analysis. |
Day 1 to day 78
|
|
Percentage of Participants With an Increase in Platelet Count of ≥ 20 x 10⁹ Cells/L Over Baseline in Part B
Tidsramme: Day 1 to day 78
|
Platelet count data after administration of rescue medication were not included in the analysis.
Participants with no platelet count data were considered non-responders.
|
Day 1 to day 78
|
|
Percentage of Participants With a Peak Platelet Count of ≥ 100 x 10⁹ Cells/L in Part B
Tidsramme: Day 1 to day 78
|
Platelet count data after administration of rescue medication were not included in the analysis.
Participants with no platelet count data were considered non-responders.
|
Day 1 to day 78
|
|
Percentage of Participants With a Peak Platelet Count of > 450 x 10⁹ Cells/L in Part B
Tidsramme: Day 1 to day 78
|
Platelet count data after administration of rescue medication were not included in the analysis.
Participants with no platelet count data were considered non-responders.
|
Day 1 to day 78
|
|
Percentage of Participants With a Peak Platelet Count of > 500 x 10⁹ Cells/L in Part B
Tidsramme: Day 1 to day 78
|
Platelet count data after administration of rescue medication were not included in the analysis.
Participants with no platelet count data were considered non-responders.
|
Day 1 to day 78
|
|
Peak Platelet Count in Part B
Tidsramme: Day 1 to day 78
|
Platelet count data after administration of rescue medication were not included in the analysis.
|
Day 1 to day 78
|
|
Change From Baseline in Peak Platelet Count in Part B
Tidsramme: Baseline and day 1 to day 78
|
Platelet count data after administration of rescue medication were not included in the analysis.
|
Baseline and day 1 to day 78
|
|
Time to Peak Platelet Count in Part B
Tidsramme: Day 1 to day 78
|
Platelet count data after administration of rescue medication were not included in the analysis.
Time to peak platelet count was analyzed using the Kaplan-Meier method.
|
Day 1 to day 78
|
|
Duration Within the Targeted Therapeutic Platelet Range in Part B
Tidsramme: Day 1 to day 78
|
Targeted therapeutic platelet level was defined as a doubling of baseline platelet counts and within the range of greater than or equal to 50 × 10⁹ cells/L and less than or equal to 450 × 10⁹ cells/L. Platelet count data after administration of rescue medication were not included in the analysis. |
Day 1 to day 78
|
Samarbejdspartnere og efterforskere
Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.
Sponsor
Publikationer og nyttige links
Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.
Generelle publikationer
- Cines DB, Wasser J, Rodeghiero F, Chong BH, Steurer M, Provan D, Lyons R, Garcia-Chavez J, Carpenter N, Wang X, Eisen M. Safety and efficacy of romiplostim in splenectomized and nonsplenectomized patients with primary immune thrombocytopenia. Haematologica. 2017 Aug;102(8):1342-1351. doi: 10.3324/haematol.2016.161968. Epub 2017 Apr 14.
- Bussel JB, Kuter DJ, George JN, McMillan R, Aledort LM, Conklin GT, Lichtin AE, Lyons RM, Nieva J, Wasser JS, Wiznitzer I, Kelly R, Chen CF, Nichol JL. AMG 531, a thrombopoiesis-stimulating protein, for chronic ITP. N Engl J Med. 2006 Oct 19;355(16):1672-81. doi: 10.1056/NEJMoa054626. Erratum In: N Engl J Med. 2006 Nov 9;355(19):2054.
Datoer for undersøgelser
Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.
Studer store datoer
Studiestart (Faktiske)
1. juli 2002
Primær færdiggørelse (Faktiske)
17. juni 2004
Studieafslutning (Faktiske)
17. juni 2004
Datoer for studieregistrering
Først indsendt
20. maj 2005
Først indsendt, der opfyldte QC-kriterier
20. maj 2005
Først opslået (Skøn)
23. maj 2005
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
10. januar 2020
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
20. december 2019
Sidst verificeret
1. december 2019
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
- Patologiske processer
- Sygdomme i immunsystemet
- Autoimmune sygdomme
- Hæmatologiske sygdomme
- Blødning
- Hæmoragiske lidelser
- Blodkoagulationsforstyrrelser
- Hudmanifestationer
- Trombocytopeni
- Blodpladeforstyrrelser
- Trombotiske mikroangiopatier
- Purpura
- Purpura, trombocytopenisk
- Purpura, trombocytopenisk, idiopatisk
Andre undersøgelses-id-numre
- 20000137
Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .