Evidence map›Paper›PMID 26084907›Full record

ArticleJournal of neurophysiology2015

Glucose sensing by GABAergic neurons in the mouse nucleus tractus solitarii.

Carie R Boychuk, Peter Gyarmati, Hong Xu, Bret N Smith

Open access · greenAbstract read
In one paragraph

Article in Journal of neurophysiology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed
2.0field-weighted citation impact, top 14% 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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

35 citing papers in PubMed, 46 citations in OpenAlex.

  1. Article
  2. Vagal GABAergic signaling in autonomic control of cardiometabolic function.American journal of physiology. Cell physiology · 2026
    Review
  3. Article
  4. GABAiScience · 2025
    Article
  5. Brain-Body Communication in Glucose Metabolism.Advances in experimental medicine and biology · 2025
    Review
  6. Review
  7. Article
  8. Review
  9. Review
  10. Article
  11. Function of the GABAergic System in Diabetic Encephalopathy.Cellular and molecular neurobiology · 2023
    Review
  12. Article
  13. Article
  14. Review
  15. Review
  16. Cellular and systemic mechanisms for glucose sensing and homeostasis.Pflugers Archiv : European journal of physiology · 2020
    Review
  17. Glucose transporters in brain in health and disease.Pflugers Archiv : European journal of physiology · 2020
    Review
  18. Review
  19. Sex-steroid-dependent plasticity of brain-stem autonomic circuits.American journal of physiology. Regulatory, integrative and comparative physiology · 2020
    Review
  20. Article
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

4 authors at 1 institution in 1 country.

Carie R BoychukDepartment of Physiology, University of Kentucky College of Medicine, Lexington, Kentucky.
Peter GyarmatiDepartment of Physiology, University of Kentucky College of Medicine, Lexington, Kentucky.
Hong XuDepartment of Physiology, University of Kentucky College of Medicine, Lexington, Kentucky.
Bret N SmithDepartment of Physiology, University of Kentucky College of Medicine, Lexington, Kentucky bret.smith@uky.edu.
University of Kentucky · US

Funding

Neural Circuitry in the Dorsal Vagal ComplexR01DK056132 · NIDDK · UNIVERSITY OF KENTUCKY · PI SMITH, BRET N · 2001 to 2019
$4.9M
NMDA modulation of diabetes-induced glutamate synaptic plasticityR21HD079256 · NICHD · UNIVERSITY OF KENTUCKY · PI SMITH, BRET N · 2014 to 2015
$405k
NICHD NIH HHS R21 HD-079256NICHD NIH HHS R21 HD079256NIDDK NIH HHS R01 DK-056132NIDDK NIH HHS R01 DK056132
6 · The paper itself

Abstract

Changes in blood glucose concentration alter autonomic function in a manner consistent with altered neural activity in brain regions controlling digestive processes, including neurons in the brain stem nucleus tractus solitarii (NTS), which process viscerosensory information. With whole cell or on-cell patch-clamp recordings, responses to elevating glucose concentration from 2.5 to 15 mM were assessed in identified GABAergic NTS neurons in slices from transgenic mice that express EGFP in a subset of GABA neurons. Single-cell real-time RT-PCR was also performed to detect glutamic acid decarboxylase (GAD67) in recorded neurons. In most identified GABA neurons (73%), elevating glucose concentration from 2.5 to 15 mM resulted in either increased (40%) or decreased (33%) neuronal excitability, reflected by altered membrane potential and/or action potential firing. Effects on membrane potential were maintained when action potentials or fast synaptic inputs were blocked, suggesting direct glucose sensing by GABA neurons. Glucose-inhibited GABA neurons were found predominantly in the lateral NTS, whereas glucose-excited cells were mainly in the medial NTS, suggesting regional segregation of responses. Responses were prevented in the presence of glucosamine, a glucokinase (GCK) inhibitor. Depolarizing responses were prevented when KATP channel activity was blocked with tolbutamide. Whereas effects on synaptic input to identified GABAergic neurons were variable in GABA neurons, elevating glucose increased glutamate release subsequent to stimulation of tractus solitarius in unlabeled, unidentified neurons. These results indicate that GABAergic NTS neurons act as GCK-dependent glucose sensors in the vagal complex, providing a means of modulating central autonomic signals when glucose is elevated.

Indexed as

AnimalsCentral Nervous System AgentsFemaleGABAergic NeuronsGlucosamineGlucoseGlutamate DecarboxylaseGreen Fluorescent ProteinsHypoglycemic AgentsKATP ChannelsMaleMembrane PotentialsMice, TransgenicPatch-Clamp TechniquesSolitary NucleusSomatostatinCentral Nervous System Agentsenhanced green fluorescent proteinGlucosamineGlucoseGlutamate Decarboxylaseglutamate decarboxylase 1Green Fluorescent ProteinsHypoglycemic AgentsKATP ChannelsSomatostatinTolbutamidebrain stemglucokinasemembrane potentialvagus nerve

Identifiers

PMID26084907
PMCPMC4725103
OpenAlexW2344880998

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.