Effect of Probiotics on Appetite Regulation in Adults With Overweight/Obesity (ProBiSat)
Probiotic Regulation of Food Intake Through Satiety Stimulation and Gut Microbiota Modulation
The goal of this 16-week randomised, placebo-controlled parallel study is to investigate the effect of a newly formed probiotic supplement on satiety and gut microbiota composition in healthy men and women with overweight or obesity form 20-70 years old. The main question it aims to answer is:
Does the probiotic supplement increase feelings of satiety and alter gut microbiota composition?
Participants will:
- Receive a daily dose of 6 g probiotic supplement (packed in sachets of 3 g) or placebo for 16 weeks.
- Visit the research unit 3 times at baseline, week 8 and week 16 of the intervention for blood draws and delivering fecal samples.
- Keep a study diary to report deviations from their daily habits and fill in food questionnaires.
Descripción general del estudio
Estado
Estado
Condiciones
Condiciones
Intervención / Tratamiento
Intervención / Tratamiento
Descripción detallada
Rationale: Satiety hormones, including glucagon-like peptide-1 (GLP-1), are key regulators of food intake. Deficiencies in the release of satiety hormones as well as alterations in the composition and the function of the gut microbiota are hallmarks of overweight and obesity. Probiotics can improve the overall structure of the gut microbiota, and show strain-specific differences with regard to their ability to stimulate satiety hormones. Those animal-based findings, if confirmed in human studies, may pose a gateway for decreased food intake, weight management, and ultimately weight loss. The investigators hypothesise that a newly developed combination of probiotic strains, specifically selected for their potential to (in vitro) influence pathways related to weight management, will decrease food intake through increased release of satiety hormones (i.e. GLP-1) and beneficial alteration of the gut microbiota in humans.
Objective: The primary objective of the study is to investigate the effects of a combination of specifically selected probiotic strains in a new probiotic formulation on ad libitum food intake, in individuals with overweight and/or obesity. The investigators will address this objective firstly with an acute study followed by a proof-of-concept 4-months intervention study comparing a total of 98 individuals in a 16-week randomised, placebo-controlled parallel study (49 participants probiotic/ 49 participants placebo).
Study design: This intervention study will have a randomised, controlled parallel design. The total study duration will be 16 weeks.
Study population: A total of 98 men and women between the ages of 20-70 years old, with overweight/obesity (BMI: 26-40 kg/m2) will be recruited, accounting for a drop-out rate of 20%.
Intervention: Study participants will receive a daily dose of 6 g probiotic supplement (packed in sachets of 3 g) or placebo for 16 weeks.
Main study parameters/endpoints: At baseline and after 16 weeks, participants will visit the research facilities for assessments. The primary endpoint is the difference in satiety measured by ad libitum food intake comparing the probiotic and control intervention. Secondary outcome parameters are related to changes in satiety hormones (including GLP-1), fecal microbiota analysis, insulin sensitivity (HOMA-IR), inflammatory markers and lipid metabolism.
Exploratory outcomes concern perceived satiety, body composition and mental health. This study will provide insight into the potential beneficial effect of a newly composed probiotic supplement on satiety in overweight/obese adults.
Tipo de estudio
Tipo de estudio
Inscripción (Estimado)
Inscripción
Fase
Fase
- No aplica
Contactos y Ubicaciones
Estudio Contacto
Estudio Contacto
- Nombre: Tanja Adam, PhD
- Número de teléfono: +31433882123
- Correo electrónico: t.adam@maastrichtuniversity.nl
Copia de seguridad de contactos de estudio
- Nombre: Iris Boelen, MSc
- Número de teléfono: +31433883644
- Correo electrónico: iris.boelen@maastrichtuniversity.nl
Ubicaciones de estudio
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Limburg
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Maastricht, Limburg, Países Bajos, 6200MD
- Reclutamiento
- Maastricht University, Department of Nutrition and Movement Sciences
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Investigador principal:
- Tanja Adam, PhD
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Contacto:
- Tanja Adam, PhD
- Número de teléfono: +31433882123
- Correo electrónico: t.adam@maastrichtuniversity.nl
-
Contacto:
- Iris Boelen, MSc
- Número de teléfono: +31 (0)433883644
- Correo electrónico: iris.boelen@maastrichtuniversity.nl
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Criterios de participación
Criterio de elegibilidad
Criterio de elegibilidad
Edades elegibles para estudiar
- Adulto
- Adulto Mayor
Acepta Voluntarios Saludables
Descripción
Inclusion Criteria:
- Men and women, aged between 20-70 years
- BMI ³ 25 kg/m2
- Stable body weight (weight gain or loss < 3 kg in the past three months)
- Willingness to give up being a blood donor from 8 weeks before the start of the study, during the study and for 4 weeks after completion of the study
- No difficult venipuncture as evidenced during the screening visit
Exclusion Criteria:
- Diabetic patients (type 1 and type 2)
- Abuse of drugs
- More than 2 units alcoholic consumptions per day for women and 3 for men
- Use of products or dietary supplements known to interfere with the main outcomes 3 months prior to the start of the study as judged by the principal investigators
- Gastrointestinal disease (including IBD and IBS)
- Use of an investigational product within another biomedical intervention trial within the previous 1-month
- Severe medical conditions that might interfere with the study, such as epilepsy, asthma, kidney failure or renal insufficiency, chronic obstructive pulmonary disease, autoimmune disease and rheumatoid arthritis
- Active cardiovascular disease like congestive heart failure or cardiovascular event, such as an acute myocardial infarction or cerebrovascular accident
- use of lipid- and glucose lowering medication, corticosteroid use
- Psychiatric diagnoses including clinical depression
- Intolerances or dietary habits that might interfere with the study (i.e. lactose intolerance or veganism)
- pregnancy
- smoking, vaping
- use of antibiotics up to 3 months prior to the study
Plan de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
- Propósito principal: Prevención
- Asignación: Aleatorizado
- Modelo Intervencionista: Asignación paralela
- Enmascaramiento: Cuadruplicar
Número de brazos
Armas e Intervenciones
Grupo de participantes/brazoGrupo de participantes/brazo |
Intervención / TratamientoIntervención / Tratamiento |
|---|---|
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Experimental: Probiotic supplement
6g of probiotic supplement daily
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16-week consumption of 6 g/day of probiotic supplement
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Comparador de placebos: Placebo
6g of placebo daily
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16-week consumption of 6 g/day of placebo
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¿Qué mide el estudio?
Medidas de resultado primarias
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
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Ad libitum food intake
Periodo de tiempo: From enrolment to the end of the 16-week intervention
|
The primary objective of the study is to investigate the effects of a combination of specifically selected probiotic strains in a new probiotic formulation on ad libitum food intake, in individuals with overweight and/or obesity.
The primary endpoint is the difference in satiety measured by ad libitum food intake comparing the probiotic and control intervention.
|
From enrolment to the end of the 16-week intervention
|
Medidas de resultado secundarias
Medidas de resultado secundarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
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Satiety hormones
Periodo de tiempo: From enrolment to the end of the 16-week intervention
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Satiety hormones, GLP-1, PYY, and ghrelin, will be measured in the blood by taking fasted and postprandial blood samples at multiple timepoints.
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From enrolment to the end of the 16-week intervention
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Subjective Appetite Sensation
Periodo de tiempo: From enrolment to the end of the 16-week intervention
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Visual Analogue Scales (VAS) will be used to register different aspects of appetite, thirst, and well-being during the test days.
The questions concern hunger, satiety, fullness, thirst, prospective food consumption, and desire to eat.
Using a validated, 100-mm line, participants place a mark on the line between anchors like "not at all" (0 mm) and "extremely" (100 mm).
Appetite sensation will be assessed at 30-minute intervals starting at time -30 until the ad libitum lunch for a total of 240 minutes.
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From enrolment to the end of the 16-week intervention
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Fecal microbial composition
Periodo de tiempo: From enrolment to the end of the 16-week intervention
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Stool samples will be collected at home and immediately stored in the freezer at -20°C.
Participants will bring the stool sample to the laboratory, while preserving the cold chain, where samples will be kept in a -80°C freezer until further analysis.
We will profile the gut microbiota composition at baseline and after treatment using 16S rRNA gene amplicon sequencing techniques.
Sequencing data will be processed using our validated in-house Bio-IT pipeline and microbial richness, diversity, community structure and taxonomic composition will be linked to the probiotic intervention as well as treatment outcomes.
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From enrolment to the end of the 16-week intervention
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Diet
Periodo de tiempo: From enrolment to the end of the 16-week intervention
|
Participants will be instructed to continue their usual dietary pattern throughout the intervention period to study the isolated effect of probiotic supplementation.
Before, at week 8 and in the last week of the intervention period, participants' dietary pattern will be assessed by means of a FFQ.
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From enrolment to the end of the 16-week intervention
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Physical Activity
Periodo de tiempo: From enrolment to the end of the 16-week intervention
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Participants will be instructed to continue their usual physical activity pattern throughout the intervention period to study the isolated effect of probiotic supplementation.
Before, at week 8 and in the last week of the intervention period, participants' physical acitivity pattern will be assessed by means of the SQUASH questionnaire.
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From enrolment to the end of the 16-week intervention
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Insulin resistance
Periodo de tiempo: From enrolment to the end of the 16-week intervention
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Fasted blood samples for glucose and insulin will be taken to determine the homeostatic model assessment of insulin resistance (HOMA-IR) and beta-cell function.
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From enrolment to the end of the 16-week intervention
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Blood pressure
Periodo de tiempo: From enrolment to the end of the 16-week intervention
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Office BP (SBP and DBP) will be determined in four-fold (the first measurement will be discarded, and the last three measurements will be averaged) using a semi continuous blood pressure monitoring device (Omron M7, CEMEX Medische Techniek, Nieuwegein, The Netherlands).
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From enrolment to the end of the 16-week intervention
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Heart rate
Periodo de tiempo: From enrolment to the end of the 16-week intervention
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Heart rate (HR) will be determined in four-fold (the first measurement will be discarded, and the last three measurements will be averaged) using a semi continuous blood pressure monitoring device (Omron M7, CEMEX Medische Techniek, Nieuwegein, The Netherlands).
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From enrolment to the end of the 16-week intervention
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Lipids
Periodo de tiempo: From enrolment to the end of the 16-week intervention
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Fasting and postprandial serum triacylglycerol (TAG) and total cholesterol (TC) and HDL-C concentrations will be measured.
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From enrolment to the end of the 16-week intervention
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Inflammatory markers
Periodo de tiempo: From enrolment to the end of the 16-week intervention
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Plasma markers related to systemic inflammation will be measured in the blood to assess low-grade systemic inflammatory responses.
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From enrolment to the end of the 16-week intervention
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Body Composition
Periodo de tiempo: From enrolment to the end of the 16-week intervention
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Measurement of body composition is done by BodPod in a fasted state.
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From enrolment to the end of the 16-week intervention
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Anthropometric measurements - Body weight
Periodo de tiempo: From enrolment to the end of the 16-week intervention
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Body weight will be measured in kilograms before the measurements without shoes and heavy clothing.
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From enrolment to the end of the 16-week intervention
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Anthropometric measurements - length
Periodo de tiempo: From enrolment to the end of the 16-week intervention
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Length will be measured in centimeters before the measurements without shoes and heavy clothing.
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From enrolment to the end of the 16-week intervention
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Anthropometric measurements - waist and hip circumferences
Periodo de tiempo: From enrolment to the end of the 16-week intervention
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Waist and hip circumferences will be measured in centimeters before the measurements using a SECA tape measure
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From enrolment to the end of the 16-week intervention
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Cognitive restrained
Periodo de tiempo: From enrolment to the end of the 16-week intervention
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Cognitive restrained, disinhibition and hunger will be assessed using the Dutch three factor eating questionnaire
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From enrolment to the end of the 16-week intervention
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Disinhibition
Periodo de tiempo: From enrolment tot he end of the 16-week intervention
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Cognitive restrained, disinhibition and hunger will be assessed using the Dutch three factor eating questionnaire
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From enrolment tot he end of the 16-week intervention
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Hunger
Periodo de tiempo: From enrolment tot he end of the 16-week intervention
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Cognitive restrained, disinhibition and hunger will be assessed using the Dutch three factor eating questionnaire
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From enrolment tot he end of the 16-week intervention
|
|
Quality of life assessment
Periodo de tiempo: From enrolment to the end of the 16-week intervention
|
The quality of life will be assessed at the end of the interventions using a 32-item questionnaire.
This measure will quantify quality of life on different dimensions: social, spiritual, emotional, cognitive, physical, activities of daily living, and integrated quality of life.
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From enrolment to the end of the 16-week intervention
|
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Mental health
Periodo de tiempo: From enrolment to the end of the 16-week intervention
|
Mental health will be assessed using the validated Beck Depression (BDI) and State-Trait Anxiety Inventories (STAI).
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From enrolment to the end of the 16-week intervention
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Mood
Periodo de tiempo: From enrolment to the end of the 16-week intervention
|
Mood will be tested using the widely-applied Profile of Mood States (POMS).
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From enrolment to the end of the 16-week intervention
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Stress
Periodo de tiempo: From enrolment to the end of the 16-week intervention
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Stress will be assessed using the Perceived Stress Scale (PSS).
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From enrolment to the end of the 16-week intervention
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Sleep characteristics
Periodo de tiempo: From enrolment to the end of the 16-week intervention
|
Sleep characteristics will be assessed at the end of the interventions using the Pittsburgh Sleep Quality Index (PSQI).
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From enrolment to the end of the 16-week intervention
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Colaboradores e Investigadores
Patrocinador
Patrocinador
Colaboradores
Colaboradores
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio (Actual)
Inicio del estudio
Finalización primaria (Estimado)
Finalización primaria
Finalización del estudio (Estimado)
Finalización del estudio
Fechas de registro del estudio
Enviado por primera vez
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Actual)
Publicado por primera vez
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
Última actualización publicada
Última actualización enviada que cumplió con los criterios de control de calidad
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Última verificación
Más información
Términos relacionados con este estudio
Palabras clave
Términos MeSH relevantes adicionales
Otros números de identificación del estudio
Otros números de identificación del estudio
- METC 25-042
Plan de datos de participantes individuales (IPD)
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Información sobre medicamentos y dispositivos, documentos del estudio
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