Evidence map›Paper›PMID 36566274›Full record

Trial reportNature communications2022

A randomized trial of oral gamma aminobutyric acid (GABA) or the combination of GABA with glutamic acid decarboxylase (GAD) on pancreatic islet endocrine function in children with newly diagnosed type 1 diabetes.

Alexandra Martin, Gail J Mick, Heather M Choat, Alison A Lunsford, Hubert M Tse, Gerald G McGwin, Kenneth L McCormick

Registry-linked trialOpen access · goldAbstract readRandomized Controlled Trial
In one paragraph

Trial report in Nature communications, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02002130 (The Use of Glutamic Acid Decarboxylase), which is not on this map. Cited by 35 papers.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed
8.7field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT02002130 phase1completednot on this map

The Use of Glutamic Acid Decarboxylase (GAD)and Gamma-Amino Butyric Acid(GABA)in the Treatment of Type I Diabetes.

TypeinterventionalSponsorUniversity of Alabama at BirminghamRan2015 to 2022Enrolled101ConditionsType I DiabetesArmsPlacebo GABA and Placebo GAD-alum, GABA and Placebo GAD-alum, Active Oral GABA and Active GAD-alum injection
3 · Its place in the literature

Who cites it

35 citing papers in PubMed, 41 citations in OpenAlex.

  1. Trial
  2. Trial
  3. Article
  4. Peripheral GABA Signaling in Metabolic Adaptation and Maladaptation.International journal of molecular sciences · 2026
    Review
  5. Article
  6. Review
  7. Article
  8. Article
  9. Article
  10. Are We Ready With Prevention for Type 1 Diabetes?Diabetes/metabolism research and reviews · 2025
    Review
  11. Review
  12. Review
  13. Review
  14. Review
  15. Article
  16. Review
  17. Review
  18. Review
  19. Review
  20. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 2 institutions in 1 country.

Alexandra Martin *Department of Pediatrics, Division of Pediatric Endocrinology, University of Alabama at Birmingham, Birmingham, AL, USA.
Gail J Mick *Department of Pediatrics, Division of Pediatric Endocrinology, University of Alabama at Birmingham, Birmingham, AL, USA. gjmick@uabmc.edu.ORCID 0000-0002-6913-9356
Heather M ChoatDepartment of Pediatrics, Division of Pediatric Endocrinology, University of Alabama at Birmingham, Birmingham, AL, USA.ORCID 0000-0002-9874-1776
Alison A LunsfordDepartment of Pediatrics, Division of Pediatric Endocrinology, University of Alabama at Birmingham, Birmingham, AL, USA.ORCID 0000-0003-3978-4933
Hubert M TseDepartment of Microbiology, Comprehensive Diabetes Center, University of Alabama at Birmingham, Birmingham, AL, USA.ORCID 0000-0001-5861-7597
Gerald G McGwinDepartment of Epidemiology, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, USA.
Kenneth L McCormickDepartment of Pediatrics, Division of Pediatric Endocrinology, University of Alabama at Birmingham, Birmingham, AL, USA. klmccormick@uabmc.edu.ORCID 0000-0003-3762-0572
University of Alabama at Birmingham · USUniversity of Alabama at Birmingham Hospital · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Gamma aminobutyric acid(GABA) is synthesized by glutamate decarboxylase(GAD) in β-cells. Regarding Type 1 diabetes(T1D), animal/islet-cell studies found that GABA promotes insulin secretion, inhibits α-cell glucagon and dampens immune inflammation, while GAD immunization may also preserve β-cells. We evaluated the safety and efficacy of oral GABA alone, or combination GABA with GAD, on the preservation of residual insulin secretion in recent-onset T1D. Herein we report a single-center, double-blind, one-year, randomized trial in 97 children conducted March 2015 to June 2019(NCT02002130). Using a 2:1 treatment:placebo ratio, interventions included oral GABA twice-daily(n = 41), or oral GABA plus two-doses GAD-alum(n = 25), versus placebo(n = 31). The primary outcome, preservation of fasting/meal-stimulated c-peptide, was not attained. Of the secondary outcomes, the combination GABA/GAD reduced fasting and meal-stimulated serum glucagon, while the safety/tolerability of GABA was confirmed. There were no clinically significant differences in glycemic control or diabetes antibody titers. Given the low GABA dose for this pediatric trial, future investigations using higher-dose or long-acting GABA formulations, either alone or with GAD-alum, could be considered, although GABA alone or in combination with GAD-alum did nor preserve beta-cell function in this trial.

Indexed as

Diabetes Mellitus, Type 1Islets of LangerhansAlum CompoundsChildgamma-Aminobutyric AcidGlucagonGlutamate DecarboxylaseHumansAlum Compoundsaluminum sulfategamma-Aminobutyric AcidGlucagonGlutamate Decarboxylase

Identifiers

PMID36566274
PMCPMC9790014
OpenAlexW4312203593

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.