The Link Between Obesity And Vitamin D in Bariatric Patients With Omega-loop Bypass Surgery (LOAD)
13 juli 2016 uppdaterad av: Maria Luger
The Link Between Obesity And Vitamin D in Bariatric Patients With Omega-loop Bypass Surgery: a Randomized Controlled, Double-blinded Clinical Supplementation Trial
The aim of the study is to increase vitamin D concentrations or to keep it on high level, respectively, by supplementing with vitamin D3 in a different dose regime, and to improve the overall health status in bariatric patients.
In this project, the vitamin D status, the parameters of inflammation, bone turnover, insulin resistance, liver and depression score of bariatric patients are expected to improve, due to supplementation of a loading dose compared to the standard therapy.
Studieöversikt
Status
Avslutad
Betingelser
Intervention / Behandling
Studietyp
Interventionell
Inskrivning (Faktisk)
50
Fas
- Fas 4
Kontakter och platser
Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.
Studieorter
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Vienna, Österrike, 1090
- Medical University of Vienna
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Deltagandekriterier
Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.
Urvalskriterier
Åldrar som är berättigade till studier
18 år till 100 år (Vuxen, Äldre vuxen)
Tar emot friska volontärer
Nej
Kön som är behöriga för studier
Allt
Beskrivning
Inclusion Criteria:
- Planned omega loop bypass surgery
- 25-hydroxy vitamin D < 75 nmol/l
- BMI >40 or ≥35 kg/m2 with co-morbidities e.g. diabetes mellitus, hypertension
- Body weight <140 kg (due to limitation of DEXA measurement)
- Capability to consent
Exclusion Criteria:
- Another planned form of bariatric surgery
- Hypercalcemia (calcium >2.63 mmol/l) or hypocalcemia (<1.75 mmol/l)
- Renal insufficiency (creatinine >133 μmol/l or GFR <50 ml/min)
- Primary hyperparathyroidism
- Malignancy
- Infection e.g. human immunodeficiency virus
- Medical conditions requiring daily calcium supplements or antacid use
- Known hypersensitivity to cholecalciferol
- No capability to consent
- Imprisoned persons
Studieplan
Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.
Hur är studien utformad?
Designdetaljer
- Primärt syfte: Behandling
- Tilldelning: Randomiserad
- Interventionsmodell: Parallellt uppdrag
- Maskning: Fyrdubbla
Vapen och interventioner
Deltagargrupp / Arm |
Intervention / Behandling |
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Aktiv komparator: Intervention
The loading dose of 300 000 IU is divided into three doses (100 000 IU) and will be given over the first months.
All patients in the intervention group will receive the first loading dose of 100 000 IU at day of discharge.
The second (2 weeks) and third (4 weeks postoperative) administration will be given based on the 25-hydroxy vitamin D concentration.
After the last respectively third loading dose a maintenance dose of 3420 IU per day should maintain the high 25-hydroxy vitamin D concentration.
It should be administered for up to 46 weeks (until follow-up visit)
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Placebo-jämförare: Placebo
The placebo loading dose (oil) is divided into three administrations and will be given over the first months.
All patients in the placebo group will receive the first placebo loading dose at day of discharge.
After the last placebo loading dose a maintenance dose of 3420 IU per day should maintain the 25-hydroxy vitamin D concentration.
It should be administered for up to 46 weeks (until follow-up).
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Vad mäter studien?
Primära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
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25-hydroxy vitamin D levels
Tidsram: 24 weeks postoperatively
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25-hydroxy vitamin D levels after 24 weeks measured in intervention and placebo group, adjusting for the baseline value as covariate
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24 weeks postoperatively
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Sekundära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
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Prevalence of sufficient vitamin D
Tidsram: 24 weeks postoperatively
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Number of patients reaching 25-hydroxyvitamin D levels above 75 nmol/l
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24 weeks postoperatively
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Prevalence of vitamin D deficiency
Tidsram: 24 weeks postoperatively
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Prevalence of vitamin D deficiency
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24 weeks postoperatively
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Co-morbidities
Tidsram: 24 weeks postoperatively
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Prevalence of Co-morbidities
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24 weeks postoperatively
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Prescribed medication
Tidsram: 24 weeks postoperatively
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Change in prescribed medication
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24 weeks postoperatively
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Body weight, body composition
Tidsram: 24 weeks postoperatively
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Change in body weight and body composition by bioelectrical impedance analysis
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24 weeks postoperatively
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Blood pressure
Tidsram: 24 weeks postoperatively
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Change of vital signs (blood pressure)
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24 weeks postoperatively
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Laboratory parameters
Tidsram: 24 weeks postoperatively
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Change in laboratory parameters compared to baseline: vitamin D status, bone turnover markers, calcium homeostasis, parathyroid hormone, inflammation, insulin resistance
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24 weeks postoperatively
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Depression symptoms
Tidsram: 24 weeks postoperatively
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Prevalence of depression symptoms assessed by Beck Depression Inventory Questionnaire
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24 weeks postoperatively
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Bone mineral density and body fat content
Tidsram: 24 weeks postoperatively
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Assessment of bone mineral density and total body fat content by DEXA
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24 weeks postoperatively
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Liver condition
Tidsram: 24 weeks postoperatively
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Measurement of liver stiffness and fat content by FibroScan and CAP
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24 weeks postoperatively
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Dietary assessment
Tidsram: 24 weeks postoperatively
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Dietary assessment will be documented with a 5-day food record to calculate vitamin D intake and the Mediterranean Score (questionnaire with calculated score)
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24 weeks postoperatively
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Gut microbiota composition
Tidsram: 24 weeks postoperatively
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Association between vitamin D, gut microbiota and surgery-induced weight loss, by collecting stool samples
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24 weeks postoperatively
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Vitamin D in adipose and liver tissue
Tidsram: during surgery
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For instance, for the purposes of describing adipose depot vitamin D concentrations and expression of enzymes in subcutaneous, visceral adipose and liver tissue samples will be collected during the omega loop gastric bypass surgery.
Furthermore, the liver tissue samples should be used in addition for a histological examination as extended diagnostics (NAFLD/ NASH).
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during surgery
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Samarbetspartners och utredare
Det är här du hittar personer och organisationer som är involverade i denna studie.
Sponsor
Utredare
- Huvudutredare: Bernhard Ludvik, M.D., Division of Endocrinology & Metabolism, Department of Internal Medicine III, Medical University of Vienna
Publikationer och användbara länkar
Den som ansvarar för att lägga in information om studien tillhandahåller frivilligt dessa publikationer. Dessa kan handla om allt som har med studien att göra.
Allmänna publikationer
- Kruschitz R, Wakolbinger M, Schindler K, Prager G, Hoppichler F, Marculescu R, Ludvik B. Effect of one-anastomosis gastric bypass on cardiovascular risk factors in patients with vitamin D deficiency and morbid obesity: A secondary analysis. Nutr Metab Cardiovasc Dis. 2020 Nov 27;30(12):2379-2388. doi: 10.1016/j.numecd.2020.08.011. Epub 2020 Aug 20.
- Luger M, Kruschitz R, Winzer E, Schindler K, Grabovac I, Kainberger F, Krebs M, Hoppichler F, Langer F, Prager G, Marculescu R, Ludvik B. Changes in Bone Mineral Density Following Weight Loss Induced by One-Anastomosis Gastric Bypass in Patients with Vitamin D Supplementation. Obes Surg. 2018 Nov;28(11):3454-3465. doi: 10.1007/s11695-018-3353-2.
- Luger M, Kruschitz R, Kienbacher C, Traussnigg S, Langer FB, Prager G, Schindler K, Kallay E, Hoppichler F, Trauner M, Krebs M, Marculescu R, Ludvik B. Vitamin D3 Loading Is Superior to Conventional Supplementation After Weight Loss Surgery in Vitamin D-Deficient Morbidly Obese Patients: a Double-Blind Randomized Placebo-Controlled Trial. Obes Surg. 2017 May;27(5):1196-1207. doi: 10.1007/s11695-016-2437-0.
- Luger M, Kruschitz R, Kienbacher C, Traussnigg S, Langer FB, Schindler K, Wurger T, Wrba F, Trauner M, Prager G, Ludvik B. Prevalence of Liver Fibrosis and its Association with Non-invasive Fibrosis and Metabolic Markers in Morbidly Obese Patients with Vitamin D Deficiency. Obes Surg. 2016 Oct;26(10):2425-32. doi: 10.1007/s11695-016-2123-2.
- Luger M, Kruschitz R, Marculescu R, Haslacher H, Hoppichler F, Kallay E, Kienbacher C, Klammer C, Kral M, Langer F, Luger E, Prager G, Trauner M, Traussnigg S, Wurger T, Schindler K, Ludvik B. The link between obesity and vitamin D in bariatric patients with omega-loop gastric bypass surgery - a vitamin D supplementation trial to compare the efficacy of postoperative cholecalciferol loading (LOAD): study protocol for a randomized controlled trial. Trials. 2015 Aug 5;16:328. doi: 10.1186/s13063-015-0877-9.
Studieavstämningsdatum
Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.
Studera stora datum
Studiestart
1 mars 2014
Primärt slutförande (Faktisk)
1 oktober 2015
Avslutad studie (Faktisk)
1 juni 2016
Studieregistreringsdatum
Först inskickad
17 mars 2014
Först inskickad som uppfyllde QC-kriterierna
19 mars 2014
Första postat (Uppskatta)
20 mars 2014
Uppdateringar av studier
Senaste uppdatering publicerad (Uppskatta)
14 juli 2016
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
13 juli 2016
Senast verifierad
1 juli 2016
Mer information
Termer relaterade till denna studie
Nyckelord
Ytterligare relevanta MeSH-villkor
Andra studie-ID-nummer
- LOAD
- 2013-003546-16 (EudraCT-nummer)
Denna information hämtades direkt från webbplatsen clinicaltrials.gov utan några ändringar. Om du har några önskemål om att ändra, ta bort eller uppdatera dina studieuppgifter, vänligen kontakta register@clinicaltrials.gov. Så snart en ändring har implementerats på clinicaltrials.gov, kommer denna att uppdateras automatiskt även på vår webbplats .