Effects of Glutamine on GLP-1 and Insulin Secretion in Man

NCT ID: NCT00673894

Last Updated: 2019-05-13

Study Results

Results available

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Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

22 participants

Study Classification

INTERVENTIONAL

Study Start Date

2008-04-30

Study Completion Date

2014-11-30

Brief Summary

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This study investigated the effect of glutamine, an amino acid, glycemia, glucagon-like peptide-1 (GLP-1) and insulin in participants with type 2 diabetes.

Detailed Description

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In this study, we investigated the effect of glutamine, an amino acid, on glycemia and on GLP-1 and insulin in participants with type 2 diabetes. Preliminary data published by our group suggests that glutamine is a strong determinant of GLP-1 secretion in vitro. We tested the hypothesis that glutamine lowers postprandial blood glucose and investigated whether the dipeptidyl peptidase-4 (DPP-4) inhibitor sitagliptin modifies this effect.

Conditions

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Type 2 Diabetes

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

CROSSOVER

Primary Study Purpose

TREATMENT

Blinding Strategy

QUADRUPLE

Participants Caregivers Investigators Outcome Assessors

Study Groups

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Glutamine+Sitagliptin

Glutamine 30 g/d (15 g with breakfast and dinner) + Sitagliptin

Group Type EXPERIMENTAL

Sitagliptin

Intervention Type DRUG

Glutamine 30g +sitagliptin 100mg

Glutamine+Placebo

Glutamine 30 g/d (15 g with breakfast and dinner) + placebo

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type DRUG

Glutamine 30g +placebo (matching sitagliptin 100 mg)

Interventions

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Sitagliptin

Glutamine 30g +sitagliptin 100mg

Intervention Type DRUG

Placebo

Glutamine 30g +placebo (matching sitagliptin 100 mg)

Intervention Type DRUG

Other Intervention Names

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Januvia

Eligibility Criteria

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Inclusion Criteria

* Type 2 diabetes, on metformin or diet alone (not sulphonylureas or insulin)

Exclusion Criteria

* Malabsorption, renal or liver disease, treatment with steroids
Minimum Eligible Age

40 Years

Maximum Eligible Age

70 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Garvan Institute of Medical Research

OTHER

Sponsor Role lead

Responsible Party

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Dr Jerry Greenfield

Prof

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Jerry R Greenfield, MD, PhD

Role: PRINCIPAL_INVESTIGATOR

Garvan Institute of Medical Research

Locations

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Clinical Research Facility

Sydney, New South Wales, Australia

Site Status

Countries

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Australia

References

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Samocha-Bonet D, Wong O, Synnott EL, Piyaratna N, Douglas A, Gribble FM, Holst JJ, Chisholm DJ, Greenfield JR. Glutamine reduces postprandial glycemia and augments the glucagon-like peptide-1 response in type 2 diabetes patients. J Nutr. 2011 Jul;141(7):1233-8. doi: 10.3945/jn.111.139824. Epub 2011 May 18.

Reference Type RESULT
PMID: 21593352 (View on PubMed)

Samocha-Bonet D, Chisholm DJ, Holst JJ, Greenfield JR. L-glutamine and whole protein restore first-phase insulin response and increase glucagon-like peptide-1 in type 2 diabetes patients. Nutrients. 2015 Mar 24;7(4):2101-8. doi: 10.3390/nu7042101.

Reference Type RESULT
PMID: 25811109 (View on PubMed)

Samocha-Bonet D, Chisholm DJ, Gribble FM, Coster AC, Carpenter KH, Jones GR, Holst JJ, Greenfield JR. Glycemic effects and safety of L-Glutamine supplementation with or without sitagliptin in type 2 diabetes patients-a randomized study. PLoS One. 2014 Nov 20;9(11):e113366. doi: 10.1371/journal.pone.0113366. eCollection 2014.

Reference Type RESULT
PMID: 25412338 (View on PubMed)

Other Identifiers

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H07/059

Identifier Type: -

Identifier Source: org_study_id

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