Food (poly)phenol Metabotypes and Beta-cell Mass and Function.

NCT ID: NCT06888167

Last Updated: 2025-03-21

Basic Information

• Recruitment Status: RECRUITING
• Clinical Phase: NA
• Total Enrollment: 40 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2024-10-14
• Study Completion Date: 2026-02-28

Brief Summary

Cross-sectional, single-centre, 'low intervention' clinical study, without drug or medical device testing, with low-risk diagnostic technique.

Detailed Description

Chronic diseases, such as cardiovascular diseases (CVD) and cardiometabolic diseases (CMD), including type 2 diabetes (DT2), represent one of the most important public health problems. Lifestyle intervention can help prevent or delay the development of diabetes mellitus. In this regard, several nutritional guidelines have been developed to promote cardiovascular and metabolic health. These recommendations promote regular consumption of fruit and vegetables, whole grains, healthy sources of protein; foods that are particularly rich in polyphenols, with known health benefits. However, their application to improve cardiometabolic health is hampered by the heterogeneity of individual response to the consumption of dietary (poly)phenols. In an intervention study entitled 'Aggregate Metabolic Phenotypes for (Poly)Phenols: Development of an Oral (Poly)Phenol Challenge Test (OPCT)', the variability of the urinary concentration of phenolic metabolites among 300 volunteers after consumption of (poly)phenol-rich tablets was assessed and predictive algorithms were generated to identify and group individuals with similar metabolic/phenotypic profiles (metabotyping). The role of these specific metabotypes (MTs) on cardiometabolic health and, more specifically, on human pancreatic beta-cell function (BCF) and mass (BCM) of individuals remains to be explored. Identifying, in fact, an association between different MTs and a higher/lower BCM/BCF would allow to evaluate the potential risk of individuals to develop metabolic diseases, as well as to act with dietary interventions aimed at protecting and preventing possible damage to pancreatic beta-cells.

In this study "Food (poly)phenol Metabotypes and Beta-cell mass ad function" (META-BETA), we intend to address - specifically - the effects on a tissue fundamental for metabolic health, namely pancreatic beta-cells. To achieve this goal, the investigators intend to focus on the action of active molecules derived from food (poly)phenols, on the function and mass of pancreatic beta-cells. In order to take into account interindividual differences, they will also explore the effects of specific metabolites derived from (poly)phenols in beta-cells derived from individuals with opposite MTs and Disposition Index, previously identified in the OPCT study.

The project is divided into two parts:

1. Association study: the association between different MTs and disposition index was explored in 300 healthy adult subjects, previously enrolled in the OPCT study. In four paired subgroups (n=10), recruited in two opposite MTs and with maximum difference in disposition index, BCFxM will be evaluated with a mixed meal complete with all macronutrients in a balanced way. In addition, BCM will be measured with the PET-CT method (beta-cell specific radioligand, Ga-exendin-4). The ratio between BCFxM (MMTT) and BCM (PET-CT) will provide the in vivo BCF data. Furthermore, during a short interview, data on the lifestyle of the subjects in the study will be collected.

2. Cause-effect study: Induced pluripotent stem cells (iPSCs), derived from peripheral blood mononuclear cell (PBMCs), from 2 subjects matched for each MT, with different BCF and BCM, will be differentiated into beta-cells where the effects of polyphenol metabolites will be evaluated. Experiments will be conducted both in control conditions and in the presence of lipotoxicity induced by stearic acid (SA).

The primary objective of this study is therefore to identify specific metabotypes (MTs) that are associated with different pancreatic beta-cell mass and function (BCFxM).

Conditions

Healthy Volunteer

Study Design

• Allocation Method: NON_RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: OTHER
• Blinding Strategy: NONE

Study Groups

Participants in the OPCT study - MT 'A', low disposition index (n=10)

Group Type: OTHER

Study setting

Intervention Type: OTHER

The subjects in the study will undergo two days of visits, in random order.

1. Following a fasting period of at least 4 hours, the study participants will undergo a PET-CT examination with Ga-exadin-4. Fasting will reduce the endogenous secretion of GLP-1 by the small intestine, which can otherwise compete with exendin-4 for binding to GLP-1R. Blood glucose will be measured before the injection of the tracer and monitored at each time point.

2. On a fasting basis, the anthropometric data of the enrolled subjects will be collected and they will undergo a short interview on their lifestyle. Subsequently, at time 0, the subjects will ingest a standard mixed meal consisting of 2 commercially available "ABC Parmareggio" snacks. Venous blood samples will be taken at specific time intervals (from -20 to 300 minutes) to measure glucose, C-peptide, insulin, glucagon, GLP-1 and glucose-dependent insulinotropic (GIP) curves. An additional blood sample will be taken at time -10 in order to isolate

Participants in the OPCT study - MT 'A', high disposition index (n=10)

Group Type: OTHER

Study setting

Intervention Type: OTHER

The subjects in the study will undergo two days of visits, in random order.

1. Following a fasting period of at least 4 hours, the study participants will undergo a PET-CT examination with Ga-exadin-4. Fasting will reduce the endogenous secretion of GLP-1 by the small intestine, which can otherwise compete with exendin-4 for binding to GLP-1R. Blood glucose will be measured before the injection of the tracer and monitored at each time point.

2. On a fasting basis, the anthropometric data of the enrolled subjects will be collected and they will undergo a short interview on their lifestyle. Subsequently, at time 0, the subjects will ingest a standard mixed meal consisting of 2 commercially available "ABC Parmareggio" snacks. Venous blood samples will be taken at specific time intervals (from -20 to 300 minutes) to measure glucose, C-peptide, insulin, glucagon, GLP-1 and glucose-dependent insulinotropic (GIP) curves. An additional blood sample will be taken at time -10 in order to isolate

Participants of the OPCT study - MT 'B', low disposition index (n=10)

Group Type: OTHER

Study setting

Intervention Type: OTHER

The subjects in the study will undergo two days of visits, in random order.

1. Following a fasting period of at least 4 hours, the study participants will undergo a PET-CT examination with Ga-exadin-4. Fasting will reduce the endogenous secretion of GLP-1 by the small intestine, which can otherwise compete with exendin-4 for binding to GLP-1R. Blood glucose will be measured before the injection of the tracer and monitored at each time point.

2. On a fasting basis, the anthropometric data of the enrolled subjects will be collected and they will undergo a short interview on their lifestyle. Subsequently, at time 0, the subjects will ingest a standard mixed meal consisting of 2 commercially available "ABC Parmareggio" snacks. Venous blood samples will be taken at specific time intervals (from -20 to 300 minutes) to measure glucose, C-peptide, insulin, glucagon, GLP-1 and glucose-dependent insulinotropic (GIP) curves. An additional blood sample will be taken at time -10 in order to isolate

Participants of the OPCT study - MT 'B', high disposition index (n=10)

Group Type: OTHER

Study setting

Intervention Type: OTHER

The subjects in the study will undergo two days of visits, in random order.

1. Following a fasting period of at least 4 hours, the study participants will undergo a PET-CT examination with Ga-exadin-4. Fasting will reduce the endogenous secretion of GLP-1 by the small intestine, which can otherwise compete with exendin-4 for binding to GLP-1R. Blood glucose will be measured before the injection of the tracer and monitored at each time point.

2. On a fasting basis, the anthropometric data of the enrolled subjects will be collected and they will undergo a short interview on their lifestyle. Subsequently, at time 0, the subjects will ingest a standard mixed meal consisting of 2 commercially available "ABC Parmareggio" snacks. Venous blood samples will be taken at specific time intervals (from -20 to 300 minutes) to measure glucose, C-peptide, insulin, glucagon, GLP-1 and glucose-dependent insulinotropic (GIP) curves. An additional blood sample will be taken at time -10 in order to isolate

Interventions

Study setting

The subjects in the study will undergo two days of visits, in random order.

1. Following a fasting period of at least 4 hours, the study participants will undergo a PET-CT examination with Ga-exadin-4. Fasting will reduce the endogenous secretion of GLP-1 by the small intestine, which can otherwise compete with exendin-4 for binding to GLP-1R. Blood glucose will be measured before the injection of the tracer and monitored at each time point.

2. On a fasting basis, the anthropometric data of the enrolled subjects will be collected and they will undergo a short interview on their lifestyle. Subsequently, at time 0, the subjects will ingest a standard mixed meal consisting of 2 commercially available "ABC Parmareggio" snacks. Venous blood samples will be taken at specific time intervals (from -20 to 300 minutes) to measure glucose, C-peptide, insulin, glucagon, GLP-1 and glucose-dependent insulinotropic (GIP) curves. An additional blood sample will be taken at time -10 in order to isolate

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

• Having been enrolled in the OPCT study;
• Ability to understand the methods, purposes and implications of the study, and to give free and informed consent.

Exclusion Criteria

• Pregnancy or breastfeeding;
• Previous exposure to ionizing radiation in research programs;
• History of psychiatric illness or alcohol abuse;
• Head trauma;
• Active neurological disease;
• Claustrophobia;
• Active malignant neoplastic disease.

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

University of Parma

OTHER

Sponsor Role: collaborator

Azienda Ospedaliero-Universitaria di Parma

OTHER

Sponsor Role: lead

Responsible Party

Alessandra Dei Cas

Prof.

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

Azienda Ospedaliero-Universitaria di Parma

Parma, PR, Italy

Site Status: RECRUITING

Countries

Italy

Central Contacts

Alessandra Dei Cas, Prof.

Role: CONTACT

alessandra.deicas@unipr.it

+390521033321

Facility Contacts

Alessandra Dei Cas, Prof.

Role: primary

alessandra.deicas@unipr.it

Raffaella Aldigeri, Dr

Role: backup

raffaella.aldigeri@unipr.it

References

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Reference Type: BACKGROUND

PMID: 25211370 (View on PubMed)

Blanchi B, Taurand M, Colace C, Thomaidou S, Audeoud C, Fantuzzi F, Sawatani T, Gheibi S, Sabadell-Basallote J, Boot FWJ, Chantier T, Piet A, Cavanihac C, Pilette M, Balguerie A, Olleik H, Carlotti F, Ejarque M, Fex M, Mulder H, Cnop M, Eizirik DL, Jouannot O, Gaffuri AL, Czernichow P, Zaldumbide A, Scharfmann R, Ravassard P. EndoC-betaH5 cells are storable and ready-to-use human pancreatic beta cells with physiological insulin secretion. Mol Metab. 2023 Oct;76:101772. doi: 10.1016/j.molmet.2023.101772. Epub 2023 Jul 11.

Reference Type: BACKGROUND

PMID: 37442376 (View on PubMed)

Eriksson O, Velikyan I, Haack T, Bossart M, Laitinen I, Larsen PJ, Berglund JE, Antoni G, Johansson L, Pierrou S, Tillner J, Wagner M. Glucagonlike Peptide-1 Receptor Imaging in Individuals with Type 2 Diabetes. J Nucl Med. 2022 May;63(5):794-800. doi: 10.2967/jnumed.121.262506. Epub 2021 Sep 9.

Reference Type: BACKGROUND

PMID: 34503957 (View on PubMed)

Other Identifiers

683-2023

Identifier Type: -

Identifier Source: org_study_id