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Acute Effects of Preladenant (SCH 420814) on Dyskinesia and Parkinsonism in Levodopa Treated Participants (P05550)

9 de octubre de 2018 actualizado por: Merck Sharp & Dohme LLC

Acute Effects of SCH 420814 on Dyskinesia and Parkinsonism in Levodopa Treated Patients

This is a randomized, placebo-controlled, 3-period crossover, balanced, single-site, third party-blind study of preladenant (SCH 420814) in participants with Parkinson disease (PD) to be conducted in conformance with Good Clinical Practices. This trial will investigate the effects of single doses of preladenant and placebo on the dyskinesia and antiparkinsonian actions of a levodopa infusion. The study will examine 10 mg ("low dose") or 100 mg ("high dose") study drug, given as single, oral administrations in conjunction with intravenous (IV) levodopa infusion and oral carbidopa.

Descripción general del estudio

Estado

Terminado

Condiciones

Intervención / Tratamiento

Tipo de estudio

Intervencionista

Inscripción (Actual)

12

Fase

  • Fase 1

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 y mayores (Adulto, Adulto Mayor)

Acepta Voluntarios Saludables

No

Géneros elegibles para el estudio

Todos

Descripción

Inclusion Criteria:

  • Participant must have a diagnosis of idiopathic PD based on history, exam and any relevant laboratory tests
  • Participants must have been treated with levodopa for one or more years
  • Participants must have motor fluctuations that can be measured as a 10% change in tapping speed between "on" and "off" and concurrent motor Unified PD Rating Scale (UPDRS) must also show a 20% improvement when "on"
  • Participants must have dyskinesia when "on" measured as at least 2 in one or more body parts on scale using 0 (absent) to 4 (severe) for four limbs, trunk, neck and face (total 7 body parts and 28 points)
  • Participant must be free of any clinically significant disease that would interfere with the study evaluations
  • Female participants must be postmenopausal and/or surgically sterilized and have a negative serum pregnancy test at the screening visit and a negative urine or serum pregnancy test upon each admission to the study center
  • Premenopausal, unsterilized female participants have to agree to use a medically accepted method of contraception
  • Male participants must agree to use a medically accepted method of contraception as or abstain from sexual intercourse during the trial and for 2 months after stopping the medication.

Exclusion Criteria:

  • Female participants who are pregnant, intend to become pregnant (within 3 months of ending the study), or are lactating
  • Participants with dementia (mini-mental state examination [MMSE] <23), hallucinations, confusion, major psychiatric disorders, and unstable medical conditions
  • Participants with any stable surgical or medical condition which might significantly alter the absorption, distribution, metabolism or excretion of any drug
  • Participants with a positive screen for drugs of abuse
  • Participants who are positive for hepatitis B surface antigen, hepatitis C antibodies or human immunodeficiency virus (HIV)
  • Participants who are currently participating in another medical interventional clinical study or have participated in a medical interventional clinical study within 30 days and who have previously received this compound.

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 cruzada
  • Enmascaramiento: Doble

Armas e Intervenciones

Grupo de participantes/brazo
Intervención / Tratamiento
Experimental: SCH 420814 10 mg→SCH 420814 100 mg→Placebo
Participants were to receive their assigned experimental treatment based on randomly assigned treatment sequence at Hour 0 following an overnight withdrawal of their antiparkinsonian medications of each treatment period. The levodopa infusion was to be started at Hour 1 and was to run for 2 hours. The participants were to also receive 25 mg of carbidopa at the following times: Hours 0, 2, and 4. Treatment periods were to be separated by at least 7 days but not more than 28 days washout between each dose.
Droga: SCH 420814 10 mg
one 10-mg capsule, orally, at hour 0 of treatment period
Droga: SCH 420814 100 mg
single oral dose of four SCH 420814 25-mg capsules at hour 0 of treatment period
Droga: Placebo
Placebo capsule, oral, at hour 0 of treatment period
Droga: Levodopa
levodopa intravenous (IV) infusion (1 mg/kg body weight) was beginning 1 hour after study drug administration and continued for 2 hours
Droga: Carbidopa
one 25-mg table, orally, at hours 0, 2 and 4 of each treatment period
Experimental: SCH 420814 100 mg→Placebo→ SCH 420814 10 mg
Participants were to receive their assigned experimental treatment based on randomly assigned treatment sequence at Hour 0 following an overnight withdrawal of their antiparkinsonian medications of each treatment period. The levodopa infusion was to be started at Hour 1 and was to run for 2 hours. The participants were to also receive 25 mg of carbidopa at the following times: Hours 0, 2, and 4. Treatment periods were to be separated by at least 7 days but not more than 28 days washout between each dose.
Droga: SCH 420814 10 mg
one 10-mg capsule, orally, at hour 0 of treatment period
Droga: SCH 420814 100 mg
single oral dose of four SCH 420814 25-mg capsules at hour 0 of treatment period
Droga: Placebo
Placebo capsule, oral, at hour 0 of treatment period
Droga: Levodopa
levodopa intravenous (IV) infusion (1 mg/kg body weight) was beginning 1 hour after study drug administration and continued for 2 hours
Droga: Carbidopa
one 25-mg table, orally, at hours 0, 2 and 4 of each treatment period
Experimental: Placebo→SCH 420814 10 mg→SCH 420814 100 mg
Participants were to receive their assigned experimental treatment based on randomly assigned treatment sequence at Hour 0 following an overnight withdrawal of their antiparkinsonian medications of each treatment period. The levodopa infusion was to be started at Hour 1 and was to run for 2 hours. The participants were to also receive 25 mg of carbidopa at the following times: Hours 0, 2, and 4. Treatment periods were to be separated by at least 7 days but not more than 28 days washout between each dose.
Droga: SCH 420814 10 mg
one 10-mg capsule, orally, at hour 0 of treatment period
Droga: SCH 420814 100 mg
single oral dose of four SCH 420814 25-mg capsules at hour 0 of treatment period
Droga: Placebo
Placebo capsule, oral, at hour 0 of treatment period
Droga: Levodopa
levodopa intravenous (IV) infusion (1 mg/kg body weight) was beginning 1 hour after study drug administration and continued for 2 hours
Droga: Carbidopa
one 25-mg table, orally, at hours 0, 2 and 4 of each treatment period
Experimental: SCH 420814 10 mg→ Placebo→ SCH 420814 100 mg
Participants were to receive their assigned experimental treatment based on randomly assigned treatment sequence at Hour 0 following an overnight withdrawal of their antiparkinsonian medications of each treatment period. The levodopa infusion was to be started at Hour 1 and was to run for 2 hours. The participants were to also receive 25 mg of carbidopa at the following times: Hours 0, 2, and 4. Treatment periods were to be separated by at least 7 days but not more than 28 days washout between each dose.
Droga: SCH 420814 10 mg
one 10-mg capsule, orally, at hour 0 of treatment period
Droga: SCH 420814 100 mg
single oral dose of four SCH 420814 25-mg capsules at hour 0 of treatment period
Droga: Placebo
Placebo capsule, oral, at hour 0 of treatment period
Droga: Levodopa
levodopa intravenous (IV) infusion (1 mg/kg body weight) was beginning 1 hour after study drug administration and continued for 2 hours
Droga: Carbidopa
one 25-mg table, orally, at hours 0, 2 and 4 of each treatment period
Experimental: SCH 420814 100 mg→ SCH 420814 10 mg→Placebo
Participants were to receive their assigned experimental treatment based on randomly assigned treatment sequence at Hour 0 following an overnight withdrawal of their antiparkinsonian medications of each treatment period. The levodopa infusion was to be started at Hour 1 and was to run for 2 hours. The participants were to also receive 25 mg of carbidopa at the following times: Hours 0, 2, and 4. Treatment periods were to be separated by at least 7 days but not more than 28 days washout between each dose.
Droga: SCH 420814 10 mg
one 10-mg capsule, orally, at hour 0 of treatment period
Droga: SCH 420814 100 mg
single oral dose of four SCH 420814 25-mg capsules at hour 0 of treatment period
Droga: Placebo
Placebo capsule, oral, at hour 0 of treatment period
Droga: Levodopa
levodopa intravenous (IV) infusion (1 mg/kg body weight) was beginning 1 hour after study drug administration and continued for 2 hours
Droga: Carbidopa
one 25-mg table, orally, at hours 0, 2 and 4 of each treatment period
Experimental: Placebo→ SCH 420814 100 mg→SCH 420814 10 mg
Participants were to receive their assigned experimental treatment based on randomly assigned treatment sequence at Hour 0 following an overnight withdrawal of their antiparkinsonian medications of each treatment period. The levodopa infusion was to be started at Hour 1 and was to run for 2 hours. The participants were to also receive 25 mg of carbidopa at the following times: Hours 0, 2, and 4. Treatment periods were to be separated by at least 7 days but not more than 28 days washout between each dose.
Droga: SCH 420814 10 mg
one 10-mg capsule, orally, at hour 0 of treatment period
Droga: SCH 420814 100 mg
single oral dose of four SCH 420814 25-mg capsules at hour 0 of treatment period
Droga: Placebo
Placebo capsule, oral, at hour 0 of treatment period
Droga: Levodopa
levodopa intravenous (IV) infusion (1 mg/kg body weight) was beginning 1 hour after study drug administration and continued for 2 hours
Droga: Carbidopa
one 25-mg table, orally, at hours 0, 2 and 4 of each treatment period

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Mean Peak Dyskinesia Score
Periodo de tiempo: Hours 0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 7.0 and 8.0 of each treatment period
Dyskinesia was scored on a scale of 0 (absent), 1 (mild) , 2 (moderate), 3 (severe) and 4 (incapacitating) for seven body parts (face, neck, trunk, each arm and each leg) based on the worse dyskinesia noted during the entire measurement time. Scores were assessed at Hours 0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 7.0 and 8.0. The dyskinesia score was the sum of the scores for the seven body parts. The peak dyskinesia score was recorded for each participant regardless of what timepoint the score was achieved. The total possible score for an individual at each timepoint could range from 0 to 28 with higher scores indicating greater effects of the dyskinesia. The mean peak dyskinesia score was calculated using the individual peak values.
Hours 0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 7.0 and 8.0 of each treatment period

Medidas de resultado secundarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Mean Peak Finger Tapping Score
Periodo de tiempo: Hours 0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 7.0 and 8.0 of each treatment period
Tapping was measured with two manual counters with keys that were depressed to register a count. The participant alternately tapped each counter using the index finger of the more affected hand for 60 seconds and was not allowed to use more than one finger to tap. The participant was instructed to tap as rapidly as possible while being timed for 60 seconds. The counts were recorded for the two counters at Hours 0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 7.0 and 8.0. The peak tapping score was recorded for each participant regardless of what timepoint the score was achieved. The mean peak finger tapping score was calculated using the individual peak values.
Hours 0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 7.0 and 8.0 of each treatment period
Mean Peak Tremor Score
Periodo de tiempo: Hours 0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 7.0 and 8.0 of each treatment period
Tremor was scored on a scale of 0 (absent), 1 (mild, 2 (moderate), 3 (severe) and 4 (incapacitating) for seven body parts (face, neck, trunk, each arm and each leg) based on the worse tremor observed during the time spent with participant while taking other study measurements(vital signs, drawing samples, performing the tapping and walking tasks). Scores were assessed at Hours 0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 7.0 and 8.0. The tremor score was the sum of scores for seven body parts. The peak tremor score was recorded for each participant regardless of what timepoint the score was achieved. The total possible score for an individual at each timepoint could range from 0 to 28 with higher scores indicating more effects of the tremors. The mean peak tremor score was calculated using the individual peak values.
Hours 0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 7.0 and 8.0 of each treatment period
Mean Peak Walking Speed
Periodo de tiempo: Hours 0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 7.0 and 8.0 of each treatment period
Walking speed assessment began with the participant being seated in an armless chair. Then while being timed, the participant stood up with their arms crossed on their chest and walked 6 meters, turned around, returned to the chair and sat. Timing was stopped when the participant's buttocks hit the chair and the total time was recorded. If the participant could not arise in 60 seconds, 60 seconds was entered in this line of the report form and the participant was tested again but allowed to push off to get out of the chair. Sixty seconds was the maximum time allowed to complete the walking assessment, thus 60 seconds was recorded as the time if they could not complete the task within this time limit. Walking speed was assessed at Hours 0, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 7.0 and 8. The peak walking speed was recorded for each participant regardless of what timepoint the score was achieved. The mean peak walking speed was calculated using the individual peak values.
Hours 0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 7.0 and 8.0 of each treatment period

Colaboradores e Investigadores

Aquí es donde encontrará personas y organizaciones involucradas en este estudio.

Patrocinador

Merck Sharp & Dohme LLC

Colaboradores

Oregon Health and Science University

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)

21 de abril de 2009

Finalización primaria (Actual)

30 de abril de 2010

Finalización del estudio (Actual)

14 de mayo de 2010

Fechas de registro del estudio

Enviado por primera vez

13 de febrero de 2009

Primero enviado que cumplió con los criterios de control de calidad

13 de febrero de 2009

Publicado por primera vez (Estimar)

16 de febrero de 2009

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

7 de noviembre de 2018

Última actualización enviada que cumplió con los criterios de control de calidad

9 de octubre de 2018

Última verificación

1 de octubre de 2018

Más información

Términos relacionados con este estudio

Términos MeSH relevantes adicionales

Otros números de identificación del estudio

  • P05550
  • MK-3814-023 (Otro identificador: Merck Study Number)

Plan de datos de participantes individuales (IPD)

¿Planea compartir datos de participantes individuales (IPD)?

SÍ

Descripción del plan IPD

https://www.merck.com/clinical-trials/pdf/ProcedureAccessClinicalTrialData.pdf

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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