Effects of a Bakery Product Enriched With Fibre and L-carnitine on Insulin Resistance in Patients With Metabolic Syndrome

NCT ID: NCT02281253

Last Updated: 2014-11-03

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

54 participants

Study Classification

INTERVENTIONAL

Study Start Date

2010-04-30

Study Completion Date

2012-07-31

Brief Summary

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The aim of this study was to evaluate the efficacy of a bakery product enriched with dietary fibre and L-carnitine on glucose homeostasis and insulin sensitivity in overweight patients with or without metabolic syndrome.

Detailed Description

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Conceivably, different biochemical changes in insulin-mediated signalling pathways may contribute to an impaired insulin-mediated glucose transport and metabolism that eventually results in insulin resistance and the clinical features of metabolic syndrome. According to this, both compounds -L-carnitine and dietary fiber- interacting by different mechanism of action could improve glucose homeostasis and insulin sensitivity. However, the health beneficial effects of the combination of both compounds are not shown and confirmation of the functionality of such products must be accomplished by conducting the appropriate studies intervention nutrition.

Conditions

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Metabolic X Syndrome Overweight Dyslipidemias

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

PREVENTION

Blinding Strategy

DOUBLE

Participants Investigators

Study Groups

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With metabolic syndrome

Before dietary therapy was initiated, in order to stabilise dietary patterns prior to intervention, patients were submitted to a 4-weeks run-in period of a caloric restriction of 500 Kcal to their usual diet. After this adaptation period, two intervention groups were evaluated: a calorie-restricted diet plus bread-enriched product that received 15.08 g of dietary fibre (9.49 g of insoluble fibre and 5.59 g of soluble fibre) plus 2325 mg of L-carnitine/day in 130 g of bread (enriched group) and a calorie-restricted diet plus placebo bread group whose diet included 130 g/day of not-enriched bread (placebo group).

Group Type EXPERIMENTAL

dietary fibre plus L-carnitine bread

Intervention Type DIETARY_SUPPLEMENT

The enriched bread consisted of a mix of wheat flour, vegetable flour, rye flour, wheat gluten, soy protein, soluble and insoluble dietary fibre, inulin, guar gum, L-carnitine salt, diacetyl tartaric, enzymes, ascorbic acid, water and yeast.

Patients were recommended to consume the bread twice per day with main meals.

Placebo bread

Intervention Type DIETARY_SUPPLEMENT

The placebo group received commercially available bread with a similar macronutrient composition and energy intake to that consumed by the enriched bread group but without L-carnitine and dietary fibre. Patients were recommended to consume the bread twice per day with main meals.

Without metabolic syndrome

Before dietary therapy was initiated, in order to stabilise dietary patterns prior to intervention, patients were submitted to a 4-weeks run-in period of a caloric restriction of 500 Kcal to their usual diet. After this adaptation period, two intervention groups were evaluated: a calorie-restricted diet plus bread-enriched product that received 15.08 g of dietary fibre (9.49 g of insoluble fibre and 5.59 g of soluble fibre) plus 2325 mg of L-carnitine/day in 130 g of bread (enriched group) and a calorie-restricted diet plus placebo bread group whose diet included 130 g/day of not-enriched bread (placebo group).

Group Type EXPERIMENTAL

dietary fibre plus L-carnitine bread

Intervention Type DIETARY_SUPPLEMENT

The enriched bread consisted of a mix of wheat flour, vegetable flour, rye flour, wheat gluten, soy protein, soluble and insoluble dietary fibre, inulin, guar gum, L-carnitine salt, diacetyl tartaric, enzymes, ascorbic acid, water and yeast.

Patients were recommended to consume the bread twice per day with main meals.

Placebo bread

Intervention Type DIETARY_SUPPLEMENT

The placebo group received commercially available bread with a similar macronutrient composition and energy intake to that consumed by the enriched bread group but without L-carnitine and dietary fibre. Patients were recommended to consume the bread twice per day with main meals.

Interventions

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dietary fibre plus L-carnitine bread

The enriched bread consisted of a mix of wheat flour, vegetable flour, rye flour, wheat gluten, soy protein, soluble and insoluble dietary fibre, inulin, guar gum, L-carnitine salt, diacetyl tartaric, enzymes, ascorbic acid, water and yeast.

Patients were recommended to consume the bread twice per day with main meals.

Intervention Type DIETARY_SUPPLEMENT

Placebo bread

The placebo group received commercially available bread with a similar macronutrient composition and energy intake to that consumed by the enriched bread group but without L-carnitine and dietary fibre. Patients were recommended to consume the bread twice per day with main meals.

Intervention Type DIETARY_SUPPLEMENT

Eligibility Criteria

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Inclusion Criteria

* BMI between 25 and 35 Kg/m2

Exclusion Criteria

* Pregnancy or lactation
* Kidney, liver and thyroid disease
* History of cardiovascular or chronic inflammatory disease
* Diabetes mellitus
* Lipid-lowering medication
* Triglyceride concentration \> 400 mg/dl
* Consumption of other carnitine and/or fibre-enriched foods
Minimum Eligible Age

25 Years

Maximum Eligible Age

70 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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AINIATechnology Center

UNKNOWN

Sponsor Role collaborator

Fundación para el Fomento de la Investigación Sanitaria y Biomédica de la Comunitat Valenciana

OTHER

Sponsor Role lead

Responsible Party

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Antonio Hernandez Mijares

PhD, MD

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Antonio Hernández, Phd, MD

Role: PRINCIPAL_INVESTIGATOR

FISABIO - University Hospital Dr Peset

References

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Ringseis R, Keller J, Eder K. Role of carnitine in the regulation of glucose homeostasis and insulin sensitivity: evidence from in vivo and in vitro studies with carnitine supplementation and carnitine deficiency. Eur J Nutr. 2012 Feb;51(1):1-18. doi: 10.1007/s00394-011-0284-2. Epub 2011 Dec 2.

Reference Type BACKGROUND
PMID: 22134503 (View on PubMed)

Malaguarnera M, Vacante M, Avitabile T, Malaguarnera M, Cammalleri L, Motta M. L-Carnitine supplementation reduces oxidized LDL cholesterol in patients with diabetes. Am J Clin Nutr. 2009 Jan;89(1):71-6. doi: 10.3945/ajcn.2008.26251. Epub 2008 Dec 3.

Reference Type BACKGROUND
PMID: 19056606 (View on PubMed)

Sola R, Bruckert E, Valls RM, Narejos S, Luque X, Castro-Cabezas M, Domenech G, Torres F, Heras M, Farres X, Vaquer JV, Martinez JM, Almaraz MC, Anguera A. Soluble fibre (Plantago ovata husk) reduces plasma low-density lipoprotein (LDL) cholesterol, triglycerides, insulin, oxidised LDL and systolic blood pressure in hypercholesterolaemic patients: A randomised trial. Atherosclerosis. 2010 Aug;211(2):630-7. doi: 10.1016/j.atherosclerosis.2010.03.010. Epub 2010 Mar 17.

Reference Type BACKGROUND
PMID: 20413122 (View on PubMed)

Robertson MD, Wright JW, Loizon E, Debard C, Vidal H, Shojaee-Moradie F, Russell-Jones D, Umpleby AM. Insulin-sensitizing effects on muscle and adipose tissue after dietary fiber intake in men and women with metabolic syndrome. J Clin Endocrinol Metab. 2012 Sep;97(9):3326-32. doi: 10.1210/jc.2012-1513. Epub 2012 Jun 28.

Reference Type BACKGROUND
PMID: 22745235 (View on PubMed)

Gonzalez-Ortiz M, Hernandez-Gonzalez SO, Hernandez-Salazar E, Martinez-Abundis E. Effect of oral L-carnitine administration on insulin sensitivity and lipid profile in type 2 diabetes mellitus patients. Ann Nutr Metab. 2008;52(4):335-8. doi: 10.1159/000151488. Epub 2008 Aug 19.

Reference Type BACKGROUND
PMID: 18714152 (View on PubMed)

Other Identifiers

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PAN-CAR-2010-01

Identifier Type: -

Identifier Source: org_study_id

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