Evidence map›Paper›PMID 27837697›Full record

ArticlePsychoneuroendocrinology2017

Spatial memory is impaired by peripubertal GnRH agonist treatment and testosterone replacement in sheep.

D Hough, M Bellingham, I R H Haraldsen, M McLaughlin, M Rennie, J E Robinson, A K Solbakk, N P Evans

Open access · hybridAbstract read
In one paragraph

Article in Psychoneuroendocrinology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
4.8field-weighted citation impact, top 6% 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

15 citing papers in PubMed, 59 citations in OpenAlex.

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  12. Gender affirming medical care of transgender youth.Current problems in pediatric and adolescent health care · 2019
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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

8 authors at 2 institutions in 2 countries.

D HoughInstitute of Biodiversity Animal Health and Comparative Medicine, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, G61 1QH, UK.
M BellinghamInstitute of Biodiversity Animal Health and Comparative Medicine, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, G61 1QH, UK.
I R H HaraldsenDepartment of Medical Neurobiology, Division of Clinical Neuroscience, Oslo University Hospital - Rikshospitalet, 0027, Oslo, Norway.
M McLaughlinDivision of Veterinary Bioscience and Education, School of Veterinary Medicine, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, G61 1QH, UK.
M RennieInstitute of Biodiversity Animal Health and Comparative Medicine, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, G61 1QH, UK.
J E RobinsonInstitute of Biodiversity Animal Health and Comparative Medicine, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, G61 1QH, UK.
A K SolbakkDepartment of Medical Neurobiology, Division of Clinical Neuroscience, Oslo University Hospital - Rikshospitalet, 0027, Oslo, Norway; Department of Psychology, University of Oslo, Pb 1094 Blindern, 0317 Oslo, Norway; Department of Neuropsychology, Helgeland Hospital, Mosjøen, Norway.
N P EvansInstitute of Biodiversity Animal Health and Comparative Medicine, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, G61 1QH, UK. Electronic address: Neil.Evans@glasgow.ac.uk.
University of Glasgow · GBOslo University Hospital · NO

Funding

Biotechnology and Biological Sciences Research Council BB/K002821/1
6 · The paper itself

Abstract

Chronic gonadotropin-releasing hormone agonist (GnRHa) is used therapeutically to block activity within the reproductive axis through down-regulation of GnRH receptors within the pituitary gland. GnRH receptors are also expressed in non-reproductive tissues, including areas of the brain such as the hippocampus and amygdala. The impact of long-term GnRHa-treatment on hippocampus-dependent cognitive functions, such as spatial orientation, learning and memory, is not well studied, particularly when treatment encompasses a critical window of development such as puberty. The current study used an ovine model to assess spatial maze performance and memory of rams that were untreated (Controls), had both GnRH and testosterone signaling blocked (GnRHa-treated), or specifically had GnRH signaling blocked (GnRHa-treated with testosterone replacement) during the peripubertal period (8, 27 and 41 weeks of age). The results demonstrate that emotional reactivity during spatial tasks was compromised by the blockade of gonadal steroid signaling, as seen by the restorative effects of testosterone replacement, while traverse times remained unchanged during assessment of spatial orientation and learning. The blockade of GnRH signaling alone was associated with impaired retention of long-term spatial memory and this effect was not restored with the replacement of testosterone signaling. These results indicate that GnRH signaling is involved in the retention and recollection of spatial information, potentially via alterations to spatial reference memory, and that therapeutic medical treatments using chronic GnRHa may have effects on this aspect of cognitive function.

Indexed as

Age FactorsAnimalsGonadotropin-Releasing HormoneMaleOrientation, SpatialSheepSignal TransductionSpatial LearningSpatial MemoryTestosteroneGonadotropin-Releasing HormoneTestosteroneGender dysphoriaGnRHHippocampusPubertySpatial memorySpatial orientation

Identifiers

PMID27837697
PMCPMC5140006
OpenAlexW2534719855

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.