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- Ensayo clínico NCT01438944
Evaluation of Transdermal Nicotine Replacement Therapy (NRT) Activity Through Metabolic Induction
Evaluation of Nicotine Receptor Up-regulation Activity Through Metabolic Induction and Changes in Responsiveness Using Surrogate Evaluation Methods
Descripción general del estudio
Estado
Intervención / Tratamiento
Descripción detallada
Studies have shown that prolonged exposure to nicotine reinforces addiction. The act of smoking delivers nicotine through lungs into the blood stream. As a result, during smoking nicotine levels peak and then when smoking stops levels progressively diminish to a base (trough) level. At the peak level a smoker feels rewarded, but at the trough level a smoker starts to experience negative withdrawal affects and a desire to smoke. Nicotine Gum and Inhalers mimic this smoking behaviour maintaining a peak and trough regime, but nicotine patches do not. Instead, nicotine patches deliver a constant base dose considered to be either above that of the smokers trough level or at a level where negative withdrawal effects are reduced.
The question arises as to if nicotine levels delivered by a patch are constant and potentially above that of the baseline smokers level, does this reinforce the addiction and therefore contribute to the high long term relapse rate? To answer this question the investigators will be looking at metabolites which the body uses to breakdown nicotine and several other enzymes. These metabolites respond to the levels of nicotine in the blood stream by increasing or decreasing over time. By testing blood flow, blood and urine the investigators are able to gain an insight into how the body is dealing with a constant stable dose of nicotine rather than a peak and trough dose. In combination with the questionnaires the investigators will be able to determine the level of affect.
Tipo de estudio
Inscripción (Actual)
Fase
- Fase 1
Contactos y Ubicaciones
Ubicaciones de estudio
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South Australia
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Adelaide, South Australia, Australia, 5044
- Kristin Carson
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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:
- Smokers who currently smoke at least 10 cigarettes per day
- Aged between 18 and 75
- Informed consent
- Willingness to attempt to quit smoking for the period specified, initially with a transdermal patch for 14 days and then without any smoking cessation aids for a further 14 days.
Exclusion Criteria:
- Use of bupropion, champix or nicotine containing products other than cigarettes in the last 2 months
- previous reactions to NRT
- Pregnancy / Breast Feeding
- Uncontrolled hypertension
- Unstable angina
- Heart attack or stroke within the previous 6 months
- Severe Obesity as indicated by Body Mass Index (BMI) ≥35 (potential for slow release of nicotine from tissues)
- acute psychiatric illness, past history psychosis, suicidal ideation or current diminished capacity.
- Current treatment or recent diagnosis of cancer
- Current use of Phenobarbital or other anticonvulsant drugs (induction of metabolism of nicotine to cotinine)
- Renal failure (creatinine clearance<30ml/min - reduces metabolic clearance of cotinine and nicotine)
Plan de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
- Propósito principal: Investigación de servicios de salud
- Asignación: N / A
- Modelo Intervencionista: Asignación de un solo grupo
- Enmascaramiento: Ninguno (etiqueta abierta)
Armas e Intervenciones
Grupo de participantes/brazo |
Intervención / Tratamiento |
---|---|
Otro: Nicabate 21mg transdermal NRT
21mg Transdermal NRT applied for 24hrs over a 14day period.
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Nicabate 21mg Transdermal NRT Patch applied daily for 14 days Testing at Baseline, Day 4, Day 14 and 14 days post.
Otros nombres:
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¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
---|---|---|
Change from baseline Nicotine, cotinine, Leptin and orexin Metabolite ratios
Periodo de tiempo: Baseline, Day 4, Day 14 and Day 28
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Baseline Prior to Transdermal NRT patch application Day 4 NRT Patch Application Day 14 Last Day NRT Patch Application Day 28 14 Days post NRT patch removal.
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Baseline, Day 4, Day 14 and Day 28
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Medidas de resultado secundarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
---|---|---|
Change from baseline Patient Instruments: Fagerstrom Test for Nicotine Dependence (FTND), Wisconsin Smoking Withdrawal Scale (WSWS), Michigan Nicotine Reinforcement Questionnaire (MNRQ), Smoker Diary
Periodo de tiempo: Baseline, Day 14 and Day 28
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Comparative evaluation patient instruments with ratios of metabolite induction
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Baseline, Day 14 and Day 28
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Colaboradores e Investigadores
Patrocinador
Colaboradores
Investigadores
- Investigador principal: Michael Roberts, BPharm PhD, University of Queeensland, University of South Australia
- Investigador principal: Brian Smith, MBBS, PhD, Queen Elizabeth Hospital, University of Adelaide
- Investigador principal: Thomas Robertson, PhD, Therapeutics Research Centre
- Investigador principal: Micahel Ward, PhD, University of South Australia
- Investigador principal: John Beltrame, MBBS, FRACP, Queen Elizabeth Hospital, University of Adelaide
- Investigador principal: Malcolm Brinn, BHlthSc, Clinical Practice Unit
- Investigador principal: Kritin Carson, PhD, Clinical Practice Unit
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio (Actual)
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 (Actual)
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Más información
Términos relacionados con este estudio
Términos MeSH relevantes adicionales
- Comportamiento compulsivo
- Comportamiento impulsivo
- Comportamiento, Adictivo
- Efectos fisiológicos de las drogas
- Agentes neurotransmisores
- Mecanismos moleculares de acción farmacológica
- Agentes Autonómicos
- Agentes del sistema nervioso periférico
- Agentes colinérgicos
- Estimulantes ganglionares
- Agonistas nicotínicos
- Agonistas colinérgicos
- Nicotina
Otros números de identificación del estudio
- 2011039
Plan de datos de participantes individuales (IPD)
¿Planea compartir datos de participantes individuales (IPD)?
Descripción del plan IPD
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. .