Evaluating the Safety and Efficacy of Romiplostim (AMG 531) in Thrombocytopenic Subjects With Immune Thrombocytopenic Purpura (ITP)
20 de diciembre de 2019 actualizado por: 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.
Descripción general del estudio
Estado
Terminado
Condiciones
Intervención / Tratamiento
Tipo de estudio
Intervencionista
Inscripción (Actual)
45
Fase
- Fase 2
Criterios de participación
Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.
Criterio de elegibilidad
Edades elegibles para estudiar
18 años a 65 años (Adulto, Adulto Mayor)
Acepta Voluntarios Saludables
No
Géneros elegibles para el estudio
Todos
Descripción
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
Plan de estudios
Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.
¿Cómo está diseñado el estudio?
Detalles de diseño
- Propósito principal: Tratamiento
- Asignación: Aleatorizado
- Modelo Intervencionista: Asignación Secuencial
- Enmascaramiento: Doble
Armas e Intervenciones
Grupo de participantes/brazo |
Intervención / Tratamiento |
|---|---|
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Experimental: 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.
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Administered by subcutaneous injection
Otros nombres:
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Experimental: 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.
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Administered by subcutaneous injection
Otros nombres:
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Experimental: 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.
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Administered by subcutaneous injection
Otros nombres:
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Experimental: 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.
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Administered by subcutaneous injection
Otros nombres:
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Experimental: 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.
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Administered by subcutaneous injection
Otros nombres:
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Experimental: 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.
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Administered by subcutaneous injection
Otros nombres:
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Comparador de placebos: Part B: Placebo
Participants received placebo subcutaneously once a week for 6 weeks.
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Administrado por inyección subcutánea
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Experimental: Part B: Romiplostim 1.0 µg/kg
Participants received 1.0 µg/kg subcutaneously once a week for 6 weeks.
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Administered by subcutaneous injection
Otros nombres:
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Experimental: Part B: Romiplostim 3.0 µg/kg
Participants received 3.0 µg/kg subcutaneously once a week for 6 weeks.
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Administered by subcutaneous injection
Otros nombres:
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Experimental: Part B: Romiplostim 6.0 µg/kg
Participants received 6.0 µg/kg subcutaneously once a week for 6 weeks.
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Administered by subcutaneous injection
Otros nombres:
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¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
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Number of Participants With Adverse Events
Periodo de tiempo: From first dose of study drug through 8 weeks (Part A) or 6 weeks (Part B) after last dose of study drug; 78 days
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From first dose of study drug through 8 weeks (Part A) or 6 weeks (Part B) after last dose of study drug; 78 days
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Number of Participants With Anti-romiplostim or Anti-endogenous Thrombopoietin Neutralizing Antibodies
Periodo de tiempo: Assessed on day 29 (Part A only), day 43 (Part B only), and day 78
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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.
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Assessed on day 29 (Part A only), day 43 (Part B only), and day 78
|
Medidas de resultado secundarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
|
Number of Participants Who Achieved Targeted Therapeutic Platelet Level in Part A
Periodo de tiempo: After first dose (day 1 to day 15 or 22) and after second dose (day 15 or 22 to day 78)
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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)
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Number of Participants With an Increase in Platelet Count of ≥ 20 x 10⁹ Cells/L Over Baseline in Part A
Periodo de tiempo: After first dose (day 1 to day 15 or 22), and after second dose (day 15 or 22 to day 78)
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Platelet count data after the use of rescue medication were not included; participants with no platelet count data were considered non-responders.
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After first dose (day 1 to day 15 or 22), and after second dose (day 15 or 22 to day 78)
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Number of Participants With a Peak Platelet Count ≥ 100 x 10⁹ Cells/L in Part A
Periodo de tiempo: 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)
|
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Number of Participants With a Peak Platelet Count of > 450 x 10⁹ Cells/L in Part A
Periodo de tiempo: 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.
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After first dose (day 1 to day 15 or 22) and after second dose (day 15 or 22 to day 78)
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Peak Platelet Count After Each Dose in Part A
Periodo de tiempo: 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.
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After first dose (day 1 to day 15 or 22) and after second dose (day 15 or 22 to day 78)
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Change From Baseline in Peak Platelet Count After Each Dose in Part A
Periodo de tiempo: 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)
|
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Time to Peak Platelet Count After Each Dose in Part A
Periodo de tiempo: 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)
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Duration Within the Targeted Therapeutic Platelet Range In Part A
Periodo de tiempo: 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)
|
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Percentage of Participants Who Achieved Targeted Therapeutic Platelet Level In Part B
Periodo de tiempo: 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
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Percentage of Participants With an Increase in Platelet Count of ≥ 20 x 10⁹ Cells/L Over Baseline in Part B
Periodo de tiempo: 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
Periodo de tiempo: 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
|
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Percentage of Participants With a Peak Platelet Count of > 450 x 10⁹ Cells/L in Part B
Periodo de tiempo: 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
|
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Percentage of Participants With a Peak Platelet Count of > 500 x 10⁹ Cells/L in Part B
Periodo de tiempo: 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
|
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Peak Platelet Count in Part B
Periodo de tiempo: Day 1 to day 78
|
Platelet count data after administration of rescue medication were not included in the analysis.
|
Day 1 to day 78
|
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Change From Baseline in Peak Platelet Count in Part B
Periodo de tiempo: 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
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Time to Peak Platelet Count in Part B
Periodo de tiempo: 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.
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Day 1 to day 78
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Duration Within the Targeted Therapeutic Platelet Range in Part B
Periodo de tiempo: Day 1 to day 78
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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
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Colaboradores e Investigadores
Aquí es donde encontrará personas y organizaciones involucradas en este estudio.
Patrocinador
Publicaciones y enlaces útiles
La persona responsable de ingresar información sobre el estudio proporciona voluntariamente estas publicaciones. Estos pueden ser sobre cualquier cosa relacionada con el estudio.
Publicaciones Generales
- 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.
Fechas de registro del estudio
Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.
Fechas importantes del estudio
Inicio del estudio (Actual)
1 de julio de 2002
Finalización primaria (Actual)
17 de junio de 2004
Finalización del estudio (Actual)
17 de junio de 2004
Fechas de registro del estudio
Enviado por primera vez
20 de mayo de 2005
Primero enviado que cumplió con los criterios de control de calidad
20 de mayo de 2005
Publicado por primera vez (Estimar)
23 de mayo de 2005
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
10 de enero de 2020
Última actualización enviada que cumplió con los criterios de control de calidad
20 de diciembre de 2019
Última verificación
1 de diciembre de 2019
Más información
Términos relacionados con este estudio
Palabras clave
Términos MeSH relevantes adicionales
- Procesos Patológicos
- Enfermedades del sistema inmunológico
- Enfermedades autoinmunes
- Enfermedades hematológicas
- Hemorragia
- Trastornos hemorrágicos
- Trastornos de la coagulación de la sangre
- Manifestaciones de la piel
- Trombocitopenia
- Trastornos de las plaquetas sanguíneas
- Microangiopatías trombóticas
- Púrpura
- Púrpura Trombocitopénica
- Púrpura Trombocitopénica Idiopática
Otros números de identificación del estudio
- 20000137
Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .