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NCT Number: NCT06625762

Nantes Bariatric Surgery Cohort

While current research suggests that inflammation of adipose tissue in obesity is linked to accelerated aging, it has yet to be determined in humans how this could enhance preventative and personalized medicine for obese individuals. The NBC study aims to investigate :

1. Whether bariatric surgery is associated with changes in biological age 2. If bariatric surgery alters adipocyte dysfunction, the microbiota and biological rhythms 3. Whether changes in adipocyte dysfunction, microbiota and biological rhythms are linked to changes in biological age.

To achieve this, establishing a biocollection before, during and after bariatric surgery will be crucial in addressing these questions

Recruiting

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Key information

Conditions

Obesity Body Weight Nutrition Disorders Nutritional and Metabolic Diseases Overnutrition Overweight Pathological Conditions, Signs and Symptoms Signs and Symptoms

Age range

18 year–70 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Nantes University Hospital

Nantes, Loire-Atlantique, 44093, France

Location status: Recruiting

Location contact

David JACOBI, PU-PH

CONTACT

[email protected]

33 2 53 48 27 09

David JACOBI, PU-PH

PRINCIPAL_INVESTIGATOR

About this study

The study of the Nantes Bariatric Surgery Cohort (NBC) aims to evaluate the impact of bariatric surgery on biological age, adipocyte dysfunction, microbiota, and biological rhythms in individuals with obesity. This observational study will include 300 participants over 3.5 years. It involves pre-operative, peri-operative, and post-operative visits to collect clinical, biological, and lifestyle data. Key assessments include anthropometrics, blood tests, questionnaires, and biocollections

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

Individuals selected for bariatric surgery (starting the BC pathway within the Nantes University Hospital bariatric unit). Inclusion criteria are those of the Bariatric Surgery program.

  • male or female, adult over 18 years of age
  • BMI ≥ 35 kg/m2 with complication(s) or ≥ 40 kg/m2 with or without complication (the list of eligible complications is referenced in HAS 2024 recommendations). In the event of a change in access to bariatric surgery, this threshold could be revised without any substantial change to the protocol.
  • having consented to their participation in the cohort
  • participant affiliated to or benefiting from a social security scheme

Exclusion criteria

  • Persons protected by law (guardianship or trusteeship) or deprived of their freedom,
  • Pregnant women (contraindication to CB) or nursing mothers.

Treatment and study plan

Nantes bariatric surgery cohort

Other

The participants will be individuals living with obesity undergoing bariatric surgery

Primary outcomes

  1. Observe how biological age evolves between pre-bariatric surgery and 1 year after bariatric surgery

    Time frame: 1 year

    Biological age will be estimated by measuring phenotypic age. The phenotypic age will be determined from the following variable: albumin, creatinine, fasting glucose, CRP, lymphocyte count, red cell size, alkaline phosphates, leukocyte count.

Study contacts

Contact information is provided by the study sponsor or research team.

David JACOBI, PU-PH

CONTACT

[email protected]

33 2 53 48 27 09

Sponsors and collaborators

Lead sponsor

Nantes University Hospital

Other

Registry information

Acronym: NBC

Important dates

Study start
2026
Primary completion
2028
Study completion
2029
First posted
Oct 3, 2024
Registry last updated
Apr 3, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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