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Evaluation of Metabolic Parameters, Intestinal Permeability and Gastrointestinal Symptoms After Bariatric Surgery in Body Weight Management (METABAR)

8 de junho de 2026 atualizado por: Betül Gülşen, Toros University

Evaluation of Postoperative Metabolic Parameters, Intestinal Permeability and Gastrointestinal Symptoms in Body Weight Management After Laparoscopic Sleeve Gastrectomy

This study aims to evaluate the changes in metabolic parameters, intestinal permeability, and gastrointestinal symptoms in individuals who have undergone bariatric surgery (Laparoscopic Sleeve Gastrectomy - LSG) for obesity treatment.

Obesity is a chronic disease associated with serious health complications including type 2 diabetes, hypertension, cardiovascular disease, and metabolic disorders. Bariatric surgery is currently the most effective treatment method for morbid obesity. However, monitoring patients after surgery in terms of metabolic health, gut permeability, and gastrointestinal symptoms is crucial for long-term success.

In this study, 40 volunteers (aged 19-50) who have undergone LSG surgery within the last month will be followed for 6 months. At the beginning of the study and 6 months later, the following will be assessed:

  • Metabolic parameters: fasting blood glucose, total cholesterol, triglycerides, high-density lipoprotein (HDL), low-density lipoprotein (LDL), very low-density lipoprotein (VLDL) cholesterol, and insulin levels
  • Intestinal permeability markers: zonulin, secretory immunoglobulin A (IgA), and lipopolysaccharide (LPS) levels
  • Gastrointestinal symptoms: assessed using the Gastrointestinal Symptom Rating Scale (GSRS)
  • Anthropometric measurements: body weight, height, waist and hip circumference, BMI
  • Nutritional intake: 3-day dietary records

The study will be conducted at Bursa Yıldırım Doruk Hospital, General Surgery Clinic. Results will contribute to understanding the relationship between bariatric surgery and gut health, potentially helping to prevent postoperative complications.

Visão geral do estudo

Status

Ainda não está recrutando

Condições

Intervenção / Tratamento

Descrição detalhada

Obesity is defined by the World Health Organization (WHO) as abnormal or excessive fat accumulation that presents a risk to health. Bariatric surgery, particularly Laparoscopic Sleeve Gastrectomy (LSG), is considered the most effective long-term treatment for morbid obesity.

This prospective observational study will be conducted at Bursa Yıldırım Doruk Hospital with 40 volunteers who have undergone LSG within the last month. Participants will be evaluated at baseline (immediately after surgery) and at 6 months post-surgery.

Assessments include:

  1. Anthropometric Measurements: Body weight, height, waist and hip circumference will be measured. BMI and waist-to-hip ratio will be calculated according to WHO criteria.
  2. Biochemical Parameters: Fasting blood glucose, total cholesterol, triglycerides, high-density lipoprotein (HDL), low-density lipoprotein (LDL), very low-density lipoprotein (VLDL) cholesterol, and insulin levels will be obtained from patient records. Zonulin, secretory immunoglobulin A (IgA), and lipopolysaccharide (LPS) levels will be analyzed using ELISA method (Biotek TS800) with commercial kits (RelAssay® Diagnostics, Ankara, Turkey) at Ankara Diagen Laboratory. Samples will be stored at -20°C until analysis.
  3. Gastrointestinal Symptom Rating Scale (GSRS): A validated 15-item scale assessing five dimensions: diarrhea, indigestion, constipation, abdominal pain, and reflux. Scores range from 1 (no discomfort) to 7 (very severe discomfort). Turkish validity and reliability was established by Turan and Asti (2011).
  4. Dietary Assessment: 3-day dietary records will be collected and analyzed using the Nutrition Information System (BeBIS) 8.2 software. Results will be evaluated according to the Turkish Dietary Guidelines 2022 (TUBER 2022).

Statistical analyses will be performed using the Statistical Package for the Social Sciences (SPSS) 22.0. Normal distribution will be assessed using Kolmogorov-Smirnov/Shapiro-Wilk tests. Results will be expressed as mean ± standard deviation for continuous variables and frequency/percentage for categorical variables.

Tipo de estudo

Observacional

Inscrição (Estimado)

40

Contactos e Locais

Esta seção fornece os detalhes de contato para aqueles que conduzem o estudo e informações sobre onde este estudo está sendo realizado.

Contato de estudo

Estude backup de contato

Locais de estudo

  • Turquia (Türkiye)
    • Bursa
      • Bursa, Bursa, Turquia (Türkiye), 16310
        • Bursa Yıldırım Doruk Hospital
        • Investigador principal:
          • Özlem ÖZPAK AKKUŞ, Assoc. Prof.
        • Subinvestigador:
          • Doğukan Durak, Assoc. Prof.
        • Subinvestigador:
          • Seher ŞEN, Asst. Prof.
        • Contato:
        • Contato:
        • Investigador principal:
          • Betül GÜLŞEN, Assoc. Prof.
        • Subinvestigador:
          • Tuğçe Nur Doganay Yıldırım, MSc, RD

Critérios de participação

Os pesquisadores procuram pessoas que se encaixem em uma determinada descrição, chamada de critérios de elegibilidade. Alguns exemplos desses critérios são a condição geral de saúde de uma pessoa ou tratamentos anteriores.

Critérios de elegibilidade

Idades elegíveis para estudo

  • Adulto

Aceita Voluntários Saudáveis

Não

Método de amostragem

Amostra Não Probabilística

População do estudo

Adults with morbid obesity who underwent Laparoscopic Sleeve Gastrectomy (LSG) at Bursa Yıldırım Doruk Hospital General Surgery Clinic within the last month, meeting the inclusion criteria.

Descrição

Inclusion Criteria:

  • Underwent Laparoscopic Sleeve Gastrectomy (LSG) within the last 1 month
  • Aged between 19-50 years
  • BMI ≥40 kg/m² or BMI ≥35 kg/m² with obesity-related comorbidities
  • Signed informed consent form
  • Non-smoker and non-alcohol dependent

Exclusion Criteria:

  • Did not undergo or is not planned to undergo LSG
  • Outside the age range of 19-50 years
  • Did not sign the informed consent form
  • BMI <40 kg/m² or BMI <35 kg/m² without obesity-related comorbidities
  • Smoker or alcohol dependent
  • Has an inflammatory disease
  • Currently using probiotics, antibiotics, or fiber supplements
  • Has a psychiatric disorder

Plano de estudo

Esta seção fornece detalhes do plano de estudo, incluindo como o estudo é projetado e o que o estudo está medindo.

Como o estudo é projetado?

Detalhes do projeto

Coortes e Intervenções

Grupo / Coorte
Intervenção / Tratamento
LSG Group
Adults aged 19-50 years who underwent Laparoscopic Sleeve Gastrectomy (LSG) within the last month at Bursa Yıldırım Doruk Hospital. Participants will be evaluated at baseline and 6 months after surgery for metabolic parameters, intestinal permeability markers, gastrointestinal symptoms, anthropometric measurements, and dietary intake.
Outro: Clinical and Biochemical Assessment
Participants will undergo two assessment visits: at baseline (within 1 month post-surgery) and at 6-month follow-up. Each visit includes anthropometric measurements (body weight, height, waist and hip circumference, BMI), biochemical blood analysis (fasting glucose, lipid profile, insulin, zonulin, secretory IgA, LPS), gastrointestinal symptom evaluation via GSRS, and 3-day dietary records.
Outros nomes:
  • Anthropometric Measurement
  • Biochemical Blood Analysis
  • Gastrointestinal Symptom Rating Scale (GSRS)
  • 3-Day Dietary Record
  • Intestinal Permeability Assessment

O que o estudo está medindo?

Medidas de resultados primários

Medida de resultado
Descrição da medida
Prazo
Change in Fasting Blood Glucose Concentration (mg/dL)
Prazo: Baseline and 6 months
Change in serum fasting blood glucose levels after 12-hour fasting between baseline and 6-month follow-up.
Baseline and 6 months
Change in Total Cholesterol Concentration (mg/dL)
Prazo: Baseline and 6 months
Change in serum total cholesterol levels after 12-hour fasting between baseline and 6-month follow-up.
Baseline and 6 months
Change in Triglyceride Concentration (mg/dL)
Prazo: Baseline and 6 months
Change in serum triglyceride levels after 12-hour fasting between baseline and 6-month follow-up.
Baseline and 6 months
Change in HDL Cholesterol Concentration (mg/dL)
Prazo: Baseline and 6 months
Change in serum high-density lipoprotein (HDL) cholesterol levels after 12-hour fasting between baseline and 6-month follow-up.
Baseline and 6 months
Change in LDL Cholesterol Concentration (mg/dL)
Prazo: Baseline and 6 months
Change in serum low-density lipoprotein (LDL) cholesterol levels after 12-hour fasting between baseline and 6-month follow-up.
Baseline and 6 months
Change in VLDL Cholesterol Concentration (mg/dL)
Prazo: Baseline and 6 months
Change in serum very low-density lipoprotein (VLDL) cholesterol levels after 12-hour fasting between baseline and 6-month follow-up.
Baseline and 6 months
Change in Fasting Insulin Concentration (µIU/mL)
Prazo: Baseline and 6 months
Change in serum fasting insulin levels after 12-hour fasting between baseline and 6-month follow-up.
Baseline and 6 months
Change in Serum Zonulin Concentration (ng/mL)
Prazo: Baseline and 6 months
Change in serum zonulin levels assessed by ELISA method between baseline and 6-month follow-up.
Baseline and 6 months
Change in Serum Secretory IgA Concentration (mg/dL)
Prazo: Baseline and 6 months
Change in serum secretory IgA levels assessed by ELISA method between baseline and 6-month follow-up.
Baseline and 6 months
Change in Serum LPS Concentration (EU/mL)
Prazo: Baseline and 6 months
Change in serum lipopolysaccharide (LPS) levels assessed by ELISA method between baseline and 6-month follow-up.
Baseline and 6 months
Change in Gastrointestinal Symptom Rating Scale (GSRS) Total Score (1-7)
Prazo: Baseline and 6 months
Change in total score of the Gastrointestinal Symptom Rating Scale (GSRS) between baseline and 6-month follow-up. The scale consists of 15 items across 5 subscales; scores range from 1 to 7, with higher scores indicating more severe gastrointestinal symptoms.
Baseline and 6 months

Medidas de resultados secundários

Medida de resultado
Descrição da medida
Prazo
Change in Body Weight (kg)
Prazo: Baseline and 6 months
Change in body weight between baseline and 6-month follow-up.
Baseline and 6 months
Change in Body Mass Index (kg/m²)
Prazo: Baseline and 6 months
Change in BMI between baseline and 6-month follow-up. Weight and height will be combined to report BMI in kg/m².
Baseline and 6 months
Change in Waist Circumference (cm)
Prazo: Baseline and 6 months
Change in waist circumference between baseline and 6-month follow-up.
Baseline and 6 months
Change in Hip Circumference (cm)
Prazo: Baseline and 6 months
Change in hip circumference between baseline and 6-month follow-up.
Baseline and 6 months
Change in Waist-to-Hip Ratio
Prazo: Baseline and 6 months
Change in waist-to-hip ratio between baseline and 6-month follow-up. Waist and hip circumference measurements will be combined to calculate the waist-to-hip ratio.
Baseline and 6 months
Change in Daily Energy Intake (kcal/day)
Prazo: Baseline and 6 months
Change in daily energy intake assessed by 3-day dietary intake records between baseline and 6-month follow-up. Data will be analyzed using BeBIS 8.2 software.
Baseline and 6 months
Change in Daily Protein Intake (g/day)
Prazo: Baseline and 6 months
Change in daily protein intake assessed by 3-day dietary intake records between baseline and 6-month follow-up. Data will be analyzed using BeBIS 8.2 software.
Baseline and 6 months
Change in Daily Carbohydrate Intake (g/day)
Prazo: Baseline and 6 months
Change in daily carbohydrate intake assessed by 3-day dietary intake records between baseline and 6-month follow-up. Data will be analyzed using BeBIS 8.2 software.
Baseline and 6 months
Change in Daily Fat Intake (g/day)
Prazo: Baseline and 6 months
Change in daily fat intake assessed by 3-day dietary intake records between baseline and 6-month follow-up. Data will be analyzed using BeBIS 8.2 software.
Baseline and 6 months

Colaboradores e Investigadores

É aqui que você encontrará pessoas e organizações envolvidas com este estudo.

Patrocinador

Toros University

Investigadores

  • Investigador principal: Betül GÜLŞEN, Assoc. Prof., Toros University
  • Cadeira de estudo: Özlem ÖZPAK AKKUŞ, Assoc. Prof., Toros University
  • Diretor de estudo: Doğukan DURAK, Assoc. Prof., Bursa Yıldırım Doruk Hospital, General Surgery Clinic

Publicações e links úteis

A pessoa responsável por inserir informações sobre o estudo fornece voluntariamente essas publicações. Estes podem ser sobre qualquer coisa relacionada ao estudo.

Publicações Gerais

Datas de registro do estudo

Essas datas acompanham o progresso do registro do estudo e os envios de resumo dos resultados para ClinicalTrials.gov. Os registros do estudo e os resultados relatados são revisados ​​pela National Library of Medicine (NLM) para garantir que atendam aos padrões específicos de controle de qualidade antes de serem publicados no site público.

Datas Principais do Estudo

Início do estudo (Estimado)

1 de julho de 2026

Conclusão Primária (Estimado)

1 de janeiro de 2027

Conclusão do estudo (Estimado)

1 de fevereiro de 2027

Datas de inscrição no estudo

Enviado pela primeira vez

20 de maio de 2026

Enviado pela primeira vez que atendeu aos critérios de CQ

8 de junho de 2026

Primeira postagem (Real)

11 de junho de 2026

Atualizações de registro de estudo

Última Atualização Postada (Real)

11 de junho de 2026

Última atualização enviada que atendeu aos critérios de controle de qualidade

8 de junho de 2026

Última verificação

1 de maio de 2026

Mais Informações

Termos relacionados a este estudo

Palavras-chave

Termos MeSH relevantes adicionais

Outros números de identificação do estudo

  • BCKLY-BGP-2026

Plano para dados de participantes individuais (IPD)

Planeja compartilhar dados de participantes individuais (IPD)?

NÃO

Descrição do plano IPD

Individual participant data will not be shared due to ethical considerations and participant confidentiality. Data will be stored securely and used only for the purposes of this study in accordance with Turkish Personal Data Protection Law (KVKK) and the ethical approval pending from Toros University Faculty of Health Sciences Non-Interventional Clinical Research Ethics Committee.

Informações sobre medicamentos e dispositivos, documentos de estudo

Estuda um medicamento regulamentado pela FDA dos EUA

Não

Estuda um produto de dispositivo regulamentado pela FDA dos EUA

Não

Essas informações foram obtidas diretamente do site clinicaltrials.gov sem nenhuma alteração. Se você tiver alguma solicitação para alterar, remover ou atualizar os detalhes do seu estudo, entre em contato com register@clinicaltrials.gov. Assim que uma alteração for implementada em clinicaltrials.gov, ela também será atualizada automaticamente em nosso site .

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Ensaios clínicos em Clinical and Biochemical Assessment

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