Evidence map›Paper›PMID 19164470›Full record

ArticleEndocrinology2009

Gamma-aminobutyric acid B receptor mediated inhibition of gonadotropin-releasing hormone neurons is suppressed by kisspeptin-G protein-coupled receptor 54 signaling.

Chunguang Zhang, Martha A Bosch, Oline K Rønnekleiv, Martin J Kelly

Open access · bronzeAbstract read
In one paragraph

Article in Endocrinology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 48 papers.

0numbers the graph read from it
0cells of the map it votes in
48citing papers in PubMed
12.4field-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.

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

48 citing papers in PubMed, 104 citations in OpenAlex.

  1. Article
  2. Article
  3. Adipose Kiss1 controls aerobic exercise-related adaptive responses in adipose tissue energy homeostasis.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2024
    Article
  4. New methods to investigate the GnRH pulse generator.Journal of molecular endocrinology · 2024
    Review
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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 2 institutions in 1 country.

Chunguang ZhangDepartment of Physiology and Pharmacology, Oregon Health and Science University, 3181 Southwest Sam Jackson Park Road, Portland, Oregon 97239, USA.
Martha A Bosch
Oline K Rønnekleiv
Martin J Kelly
Oregon Health & Science University · USOregon National Primate Research Center · US

Funding

Sex Differences in the Control of FeedingR01DK068098 · NIDDK · OREGON HEALTH & SCIENCE UNIVERSITY · PI KELLY, MARTIN JEFFREY, RØNNEKLEIV, OLINE KARIN · 2005 to 2024
$7.1M
BETA ENDORPHIN NEURONS AND THE CONTROL OF HOMEOSTASISR01NS038809 · NINDS · OREGON HEALTH & SCIENCE UNIVERSITY · PI KELLY, MARTIN JEFFREY · 1999 to 2018
$6.8M
Estrogen Modulation of Bursting Activity in GnRH NeuronsR01NS043330 · NINDS · OREGON HEALTH & SCIENCE UNIVERSITY · PI RØNNEKLEIV, OLINE KARIN · 2004 to 2019
$5.5M
Beta Endorphin Neurons and the Control of HomeostasisR56NS038809 · NINDS · OREGON HEALTH & SCIENCE UNIVERSITY · PI KELLY, MARTIN JEFFREY · 2009 to 2009
$481k
Crosstalk between Estrogen and Metabolic Hormone Signaling in Kisspeptin NeuronsR56DK068098 · NIDDK · OREGON HEALTH & SCIENCE UNIVERSITY · PI KELLY, MARTIN JEFFREY, RØNNEKLEIV, OLINE KARIN · 2020 to 2020
$262k
NIDDK NIH HHS DK68098NIDDK NIH HHS R01 DK068098NIDDK NIH HHS R56 DK068098NINDS NIH HHS NS38809NINDS NIH HHS NS43330NINDS NIH HHS R01 NS038809NINDS NIH HHS R01 NS043330NINDS NIH HHS R56 NS038809
6 · The paper itself

Abstract

Gamma-aminobutyric acid (GABA) is one of the most important neurotransmitters that regulate the excitability of GnRH neurons. Numerous studies have shown that GABA activates Cl(-) currents in GnRH neurons, and these effects are antagonized by GABA(A) receptor antagonists. The GABA(B) receptor is a heterodimer composed of GABA(B) R1 and R2, and although both subunits have been localized in GnRH neurons, nothing is known about the cellular signaling of this G alpha(i,o)-coupled receptor in GnRH neurons. Using whole-cell recordings from mouse enhanced green fluorescent protein-GnRH neurons, we found that the GABA(B) receptor agonist baclofen hyperpolarized GnRH neurons through activation of an inwardly rectifying K(+) current in a concentration-dependent manner. The effects of baclofen were antagonized by the selective GABA(B) receptor antagonist CGP 52432 with a K(i) (inhibitory constant) of 85 nm. Furthermore, in the presence of the GABA(A) receptor antagonist picrotoxin, GABA hyperpolarized GnRH neurons in a similar manner. Treatment with 17beta-estradiol as compared with oil vehicle did not significantly alter either the EC(50) for the baclofen-induced response (0.8 +/- 0.1 vs. 1.0 +/- 0.1 microM, respectively) or the maximal outward current (10.8 +/- 1.7 pA vs. 11.4 +/- 0.6 pA, respectively) in GnRH neurons. However, the outward current (and membrane hyperpolarization) was abrogated by submaximal concentrations of the G protein-coupled receptor 54 (GPR54) agonist kisspeptin-10 in both groups, indicating that G alpha(q)-coupled (GPR54) can desensitize the GABA(B) receptor-mediated response. Therefore, the activation of GABA(B) receptors in GnRH neurons may provide increased inhibitory tone during estrogen-negative feedback states that is attenuated by kisspeptin during positive feedback.

Indexed as

AnimalsBaclofenBenzylaminesDown-RegulationGABA AgonistsGABA AntagonistsGABA-B Receptor AntagonistsGonadotropin-Releasing HormoneG Protein-Coupled Inwardly-Rectifying Potassium ChannelsKisspeptinsMembrane PotentialsMiceNeuronsPhosphinic AcidsReceptors, GABA-BReceptors, G-Protein-CoupledBaclofenBenzylaminesCGP 52432GABA AgonistsGABA AntagonistsGABA-B Receptor AntagonistsGonadotropin-Releasing HormoneG Protein-Coupled Inwardly-Rectifying Potassium ChannelsKiss1 protein, mouseKiss1r protein, mouseKisspeptinsPhosphinic AcidsReceptors, GABA-BReceptors, G-Protein-CoupledReceptors, Kisspeptin-1Tumor Suppressor Proteins

Identifiers

PMID19164470
PMCPMC2671904
OpenAlexW2122516650

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.