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Attenuation of Inflammatory Processes Associated With Alzheimer's Disease After Consumption of Pomace Olive Oil. (ORIVA2)

31 de agosto de 2021 actualizado por: Javier Sánchez Perona, National Research Council, Spain

Alzheimer's disease (AD) is the most common cause of dementia and its prevalence will multiply in the coming years, so it is urgent to establish preventive and therapeutic measures. AD it is characterized by cerebrovascular and parenchymal accumulation of protein deposits enriched in amyloid-beta (Aβ) as a consequence of alterations of the blood-brain barrier. More than 60% of plasma Aβ is associated with triglyceride-rich lipoproteins (TRL), being higher in subjects with AD. Microglia act as resident macrophages and play a crucial role in most neuropathologies, since it is activated after homeostasis impairment in the brain, and surrounds amyloid plaques in patients with AD. As a result of microglial activation, a large number of pro-inflammatory markers are released, mediated by alterations in the redox state, through the generation of ROS by the complex NADPH oxidase.

In a previous study, the investigators demonstrated in BV-2 cells that artificial TRL are capable of activating microglia and trigger an inflammatory process. In addition, the investigators showed that some of lipophilic minor components of pomace olive oil simultaneously modulate oxidative stress and the inflammatory response in microglia. The investigators suggested that these results should be replicated in humans after consumption of pomace olive oil.

Therefore, in the present study we formulate the hypothesis that human TRL are capable of activating microglia and that such activation can be attenuated when those particles are generated after consumption of pomace olive oil. The results of the study would lay the foundation for the start of clinical trials demonstrating the effect of pomace oil in reducing the risk of development and progression of AD.

Descripción general del estudio

Estado

Terminado

Condiciones

Intervención / Tratamiento

Descripción detallada

In a previous study, the investigators demonstrated that triglyceride-rich lipoproteins (TRL), which transport dietary lipid components, are able of activating microglia, which could be associated with the state of neuroinflammation in patients of Alzheimer's disease. In addition, the investigators also demonstrated that some of the minor fat-soluble components of olive pomace oil simultaneously modulate oxidative stress and the inflammatory response in microglia, so that these components could have the ability to protect the brain from microglial overactivation when transported in TRL.

In that study, the investigators used artificial TRL that were manufactured ad-hoc in the laboratory, in order to be able to test the effect of the compounds both individually and together. Now is the time to consolidate the results using human TRL, obtained after the consumption of olive pomace oil. The investigators expect that the results of this study will reveal that the intake of olive pomace oil can prevent the release of inflammatory markers caused by the overactivation of microglia, which could be associated to a reduction in the risk of development and progression of Alzheimer's disease.

Objectives and design

To test this hypothesis, two specific objectives will be addressed:

  1. To obtain and characterize human TRL obtained after the intake of olive pomace oil.
  2. To evaluate the mitigating effect of the microglial activation by TRL obtained after the intake of olive pomace oil.

The study has been designed as a randomized and crossover trial in the postprandial phase in healthy subjects, which will be divided into two groups to which a pomace oil and high-oleic sunflower oil will be administered.

Activities

The specific objectives set out in the project will be addressed through the execution of the activities that are detailed below:

  1. Selection of volunteers and administration of olive pomace oil. 1.1. Obtaining and characterizing the experimental oils. 1.2. Recruitment and selection of volunteers. 1.3. Clinical trial in the postprandial phase.
  2. Isolation and characterization of human TRL. 2.1. General determinations in blood serum. 2.2. Characterization of TRL.
  3. Microglial activation in cells treated with human TRL. 3.1. Assays in cell cultures. 3.2. Analytical determinations. 3.3. Data processing and reporting.

Tipo de estudio

Intervencionista

Inscripción (Actual)

20

Fase

  • No aplica

Contactos y Ubicaciones

Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.

Ubicaciones de estudio

  • España
      • Seville, España, 41012
        • Instituto de la Grasa (IG-CSIC)

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 26 años (Adulto)

Acepta Voluntarios Saludables

Sí

Géneros elegibles para el estudio

Femenino

Descripción

Inclusion Criteria:

  • Healthy individuals.
  • Subjects will be recruited after a complete biochemical and haematological analysis yields results within normal limits

Exclusion Criteria:

  • Digestive or metabolic conditions.
  • Overweight or obesity.
  • Intolerance to food components or ingredients.
  • Any condition affecting lipid metabolism.
  • Any inflammatory condition.
  • Habitual drug intake of any kind.

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: Prevención
  • Asignación: Aleatorizado
  • Modelo Intervencionista: Asignación cruzada
  • Enmascaramiento: Triple

Armas e Intervenciones

Grupo de participantes/brazo
Intervención / Tratamiento
Comparador activo: Pomace olive oil
50 g of pomace olive oil will be administered in a single dose together with a breakfast composed of 3 slices of whole-grain bread, 5 g of tomato pureé and 200 ml of milk.
Otro: Experimental meal
Two dietary oils will be administrated as part of a single experimental meal, for the present is a postprandial phase study.
Comparador activo: High-oleic sunflower oil
50 g of high-sunflower oil will be administered in a single dose together with a breakfast composed of 3 slices of whole-grain bread, 5 g of tomato pureé and 200 ml of milk.
Otro: Experimental meal
Two dietary oils will be administrated as part of a single experimental meal, for the present is a postprandial phase study.

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Inflammation markers
Periodo de tiempo: Postprandial (6 hours)
Release of proinflammatory markers TNF-α, IL-6 and IL-1β by BV2 cells treated with TRL obtained after the intake of pomace olive oil or high-oleic sunflower oil.
Postprandial (6 hours)

Medidas de resultado secundarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Redox markers
Periodo de tiempo: Postprandial (6 hours)
Concentrations of the redox markers reactivo oxygen species and total and reduced glutathione in BV2 cells treated with TRL obtained after the intake of pomace olive oil or high-oleic sunflower oil.
Postprandial (6 hours)

Colaboradores e Investigadores

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

Patrocinador

National Research Council, Spain

Colaboradores

Hospitales Universitarios Virgen del Rocío

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)

10 de junio de 2020

Finalización primaria (Actual)

31 de octubre de 2020

Finalización del estudio (Actual)

28 de julio de 2021

Fechas de registro del estudio

Enviado por primera vez

9 de septiembre de 2020

Primero enviado que cumplió con los criterios de control de calidad

16 de septiembre de 2020

Publicado por primera vez (Actual)

23 de septiembre de 2020

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

1 de septiembre de 2021

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

31 de agosto de 2021

Última verificación

1 de agosto de 2021

Más información

Términos relacionados con este estudio

Términos MeSH relevantes adicionales

Otros números de identificación del estudio

  • 20191185 ORIVA

Plan de datos de participantes individuales (IPD)

¿Planea compartir datos de participantes individuales (IPD)?

NO

Información sobre medicamentos y dispositivos, documentos del estudio

Estudia un producto farmacéutico regulado por la FDA de EE. UU.

No

Estudia un producto de dispositivo regulado por la FDA de EE. UU.

No

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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