Evidence map›Paper›PMID 25886766›Full record

ArticleBMC neuroscience2015

The effect of adolescent testosterone on hippocampal BDNF and TrkB mRNA expression: relationship with cell proliferation.

Katherine M Allen, Tertia D Purves-Tyson, Samantha J Fung, Cynthia Shannon Weickert

Open access · goldAbstract read
In one paragraph

Article in BMC neuroscience, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
2.3field-weighted citation impact, top 13% 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

14 citing papers in PubMed, 33 citations in OpenAlex.

  1. Article
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  4. Androgens and Adult Neurogenesis in the Hippocampus.Androgens: clinical research and therapeutics · 2021
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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 1 institution in 1 country.

Katherine M AllenSchizophrenia Research Institute, Sydney, Australia. k.allen@neura.edu.au.
Tertia D Purves-TysonSchizophrenia Research Institute, Sydney, Australia. t.purves-tyson@neura.edu.au.
Samantha J FungSchizophrenia Research Institute, Sydney, Australia. s.fung@neura.edu.au.
Cynthia Shannon WeickertSchizophrenia Research Institute, Sydney, Australia. cyndi@neura.edu.au.
Schizophrenia Research Institute · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundTestosterone attenuates postnatal hippocampal neurogenesis in adolescent male rhesus macaques through altering neuronal survival. While brain-derived neurotropic factor (BDNF)/ tyrosine kinase receptor B (TrkB) are critical in regulating neuronal survival, it is not known if the molecular mechanism underlying testosterone's action on postnatal neurogenesis involves changes in BDNF/TrkB levels. First, (1) we sought to localize the site of synthesis of the full length and truncated TrkB receptor in the neurogenic regions of the adolescent rhesus macaque hippocampus. Next, (2) we asked if gonadectomy or sex hormone replacement altered hippocampal BDNF and TrkB expression level in mammalian hippocampus (rhesus macaque and Sprague Dawley rat), and (3) if the relationship between BDNF/TrkB expression was altered depending on the sex steroid environment.

resultsWe find that truncated TrkB mRNA+ cells are highly abundant in the proliferative subgranular zone (SGZ) of the primate hippocampus; in addition, there are scant and scattered full length TrkB mRNA+ cells in this region. Gonadectomy or sex steroid replacement did not alter BDNF or TrkB mRNA levels in young adult male rat or rhesus macaque hippocampus. In the monkey and rat, we find a positive correlation with cell proliferation and TrkB-TK+ mRNA expression, and this positive relationship was found only when sex steroids were present.

conclusionsWe suggest that testosterone does not down-regulate neurogenesis at adolescence via overall changes in BDNF or TrkB expression. However, BDNF/TrkB mRNA appears to have a greater link to cell proliferation in the presence of circulating testosterone.

Indexed as

AnimalsBrain-Derived Neurotrophic FactorBromodeoxyuridineHippocampusHormone Replacement TherapyImmunohistochemistryIn Situ HybridizationKi-67 AntigenMacaca mulattaMaleNeurogenesisOrchiectomyRats, Sprague-DawleyReal-Time Polymerase Chain ReactionReceptor, trkBRNA, MessengerBrain-Derived Neurotrophic FactorBromodeoxyuridineKi-67 AntigenReceptor, trkBRNA, MessengerTestosterone

Identifiers

PMID25886766
PMCPMC4367905
OpenAlexW2025863200

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.