- ICH GCP
- Registro de ensayos clínicos de EE. UU.
- Ensayo clínico NCT00284752
Phase II Trial of Abraxane in Front Line Therapy of Hormone Refractory Metastatic Prostate Cancer
Descripción general del estudio
Descripción detallada
Taxanes are the most widely tested and effective chemotherapy drugs for hormone refractory prostate cancer. Weekly paclitaxel was reported to produce 25-39% PSA responses in first line and up to 33% in second line chemotherapy of patients with prostate cancer in early clinical trials (1, 2). Paclitaxel activity in prostate cancer is schedule dependent, and weekly paclitaxel was reported to produce highest response rates (1, 2). Docetaxel was recently approved by the Food and Drug Administration for treatment of hormone refractory metastatic prostate cancer, since it is the only chemotherapy drug with documented improvement in survival in this group of patients. Docetaxel was associated with 45.8% overall grade 3/4 toxicities and it has to be given with steroid pre-medication. This regimen might be difficult to use in advanced prostate cancer patients that are often elderly and with multiple co-morbid conditions.
ABI-007 [Abraxane™ (paclitaxel protein-bound particles for injectable suspension) (albumin-bound)] is the first in its class of biologically interactive albumin-bound forms of chemotherapy (3). This composition provides a novel approach of increasing intra-tumoral concentration of the drug by a receptor-mediated transport process allowing transcytosis across the endothelial cell wall, thereby breaching the blood/tumor interface. This albumin-specific receptor mediated process involves the binding of a specific receptor (gp60) on the endothelial cell wall, resulting in activation of a protein caveolin-1, which initiates an opening in the endothelial wall with formation of a little caves or caveolae, with transport of the albumin-bound chemotherapeutic complex via these caveolae to the underlying tumor interstitium (4). A protein specifically secreted by the tumor (SPARC) binds and entraps the albumin, allowing release of the hydrophobic drug to the tumor cell membrane. ABI-007 is the first biologically interactive albumin-bound chemotherapy agent leveraging this gp-60/caveolin-1/caveolae/Sparc pathway to increase intra-tumoral concentration of the drug and reduce the amount of the toxic chemotherapy in normal tissue.
Preclinical studies comparing Abraxane to paclitaxel demonstrated lower toxicities, with a maximum tolerated dose (MTD) approximately 50% higher for Abraxane (7) compared to paclitaxel (11). At equal doses there was less myelosuppression and improved efficacy than paclitaxel in a xenograft tumor model of human mammary adenocarcinoma. Clinical studies confirmed improved toxicity profile and higher response rates, in metastatic breast cancer, of Abraxane compared to cremophor EL paclitaxel (Taxol) (5, 8). The weekly regimen was shown to be active even in patients with cancers refractory to paclitaxel, docetaxel or when Abraxane was given after both agents (8).
Tipo de estudio
Inscripción (Actual)
Fase
- Fase 2
Contactos y Ubicaciones
Ubicaciones de estudio
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California
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Vallejo, California, Estados Unidos, 94589
- Kaiser Permanente
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-
Criterios de participación
Criterio de elegibilidad
Edades elegibles para estudiar
Acepta Voluntarios Saludables
Géneros elegibles para el estudio
Descripción
Inclusion Criteria:
- Histopathologically or cytologically proven adenocarcinoma of the prostate metastatic to the bones or lymph nodes as documented by bone scan or CT scan with evidence of progression despite standard hormonal management (orchiectomy, GNRH agonist, or GNRH antagonist-hormone refractory). No major organ allowed
- No prior chemotherapy
- For patients who have been on anti-androgen therapy, patients must have progressive disease after anti-androgen withdrawal (6 weeks biclutamide or nilutamide, 4 weeks for flutamide).
- PSA progression is defined as rising PSA.
Exclusion Criteria:
- Active malignancy other than non-melanoma skin cancer within 5 years of enrollment.
- Significant active medical illness which in the opinion of the investigator will preclude treatment.
- Brain metastasis, any non-bone metastasis except lymph node metastasis
Plan de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
- Propósito principal: Tratamiento
- Asignación: N / A
- Modelo Intervencionista: Asignación de un solo grupo
- Enmascaramiento: Ninguno (etiqueta abierta)
Armas e Intervenciones
Grupo de participantes/brazo |
Intervención / Tratamiento |
---|---|
Experimental: ABI-007
|
This is a Phase II single-arm study for first-line chemotherapy of patients with hormone refractory metastatic prostate cancer.
Eligible patients will be chemotherapy naive and will receive weekly Abraxane 100mg/m2 IV over 30 minutes.
These will be 4-week cycles with patients receiving Abraxane 100 mg/m2 weekly for 3 weeks and one week off for rest.
Patients will continue on therapy until disease or PSA
|
¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Periodo de tiempo |
---|---|
Evaluate the efficacy of Abraxane in first line chemotherapy of patients with
Periodo de tiempo: August 2008
|
August 2008
|
hormone refractory metastatic prostate cancer, based on prostate specific antigen (PSA) response
Periodo de tiempo: August 2008
|
August 2008
|
Medidas de resultado secundarias
Medida de resultado |
Periodo de tiempo |
---|---|
Evaluate the effect of Abraxane on,Time to PSA progression, Measurable tumor response rate (if measureable disease at baseline), Overall survival
Periodo de tiempo: August 2008
|
August 2008
|
Evaluate the toxicity of Abraxane in this group of patients.
Periodo de tiempo: August 2008
|
August 2008
|
Colaboradores e Investigadores
Patrocinador
Colaboradores
Investigadores
- Investigador principal: Tatjana Kolevska, MD, Kaiser Permanente
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio
Finalización primaria (Actual)
Finalización del estudio (Actual)
Fechas de registro del estudio
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Estimar)
Actualizaciones de registros de estudio
Última actualización publicada (Estimar)
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Más información
Términos relacionados con este estudio
Palabras clave
Términos MeSH relevantes adicionales
Otros números de identificación del estudio
- TK001
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. .
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