BDNF-TrkB signaling in oxytocin neurons contributes to maternal behavior
- Lieber Institute for Brain Development, United States
Abstract
Brain-derived neurotrophic factor (Bdnf) transcription is controlled by several promoters, which drive expression of multiple transcripts encoding an identical protein. We previously reported that BDNF derived from promoters I and II is highly expressed in hypothalamus and is critical for regulating aggression in male mice. Here we report that BDNF loss from these promoters causes reduced sexual receptivity and impaired maternal care in female mice, which is concomitant with decreased oxytocin (Oxt) expression during development. We identify a novel link between BDNF signaling, oxytocin, and maternal behavior by demonstrating that ablation of TrkB selectively in OXT neurons partially recapitulates maternal care impairments observed in BDNF-deficient females. Using translating ribosome affinity purification and RNA-sequencing we define a molecular profile for OXT neurons and delineate how BDNF signaling impacts gene pathways critical for structural and functional plasticity. Our findings highlight BDNF as a modulator of sexually-dimorphic hypothalamic circuits that govern female-typical behaviors.
Data availability
All RNA-seq analysis code and source data are available on the GitHub repository: https://github.com/LieberInstitute/oxt_trap_seq/. Raw sequencing reads are available on SRA under accession code SRP157978.
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BDNF-TrkB signaling in oxytocin neurons contributes to maternal behaviorRaw sequencing reads are available on SRA under accession code SRP157978.
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Rapid molecular profiling of defined cell types using viral TRAPPublicly available at the NCBI Gene Expression Omnibus (accession no: GSE89737).
Article and author information
Author details
Funding
National Institute of Mental Health (T32MH01533037)
- Kristen R Maynard
Lieber Institute for Brain Development
- Keri Martinowich
National Institute of Mental Health (RO1MH105592)
- Keri Martinowich
The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.
Ethics
Animal experimentation: All experimental animal procedures were approved by the Sobran Biosciences Institutional Animal Care and Use Committee (IACUC) under protocol number LIE-004-2015.
Copyright
© 2018, Maynard et al.
This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.
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BDNF-TrkB signaling in oxytocin neurons contributes to maternal behavior
eLife 7:e33676.
https://doi.org/10.7554/eLife.33676
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