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Isolation of Targeted Hypothalamic Neurons for Studies of Hormonal, Metabolic, and Electrical Regulation
Published on: August 4, 2023
The hypothalamic-neurohypophyseal system: from genome to physiology
D Murphy1, A Konopacka, C Hindmarch
1Henry Wellcome Laboratories for Integrative Neuroscience and Endocrinology, University of Bristol, Bristol, UK. d.murphy@bristol.ac.uk
Journal of Neuroendocrinology
|March 28, 2012
Summary
Mammalian genomes reveal surprising complexity beyond protein-coding genes. This review explores gene expression, regulation, and function in the hypothalamic-neurohypophyseal system (HNS).
Area of Science:
- Genomics
- Neuroscience
- Molecular Biology
Background:
- Mammalian genome sequencing reveals a limited number of protein-coding genes, yet harbors significant complexity.
- Genomic complexity arises from cis-regulatory sequences, noncoding RNAs, alternative splicing, and post-translational modifications.
- The hypothalamic-neurohypophyseal system (HNS) presents a model for studying genome complexity in gene expression and regulation.
Purpose of the Study:
- To review current approaches for deciphering genome complexity within the HNS.
- To highlight advancements in understanding gene expression, regulation, and function in the HNS.
- To examine the roles of vasopressin (AVP) and oxytocin (OXT) in physiological and behavioral processes.
Main Methods:
- Transcriptomics to identify genes responding to physiological and pathological cues.
- Mass spectrometry for single-cell peptide identification and release measurement in the HNS.
- Transgenic models and viral vectors for studying neuronal function, including optogenetics for behavioral analysis.
Main Results:
- Transcriptomics identified key genes involved in dehydration and hypertension responses.
- Mass spectrometry enabled detailed analysis of bioactive peptides and their release.
- Studies demonstrated the role of somato-dendritically released AVP in cardiovascular homeostasis via V1a receptors.
- Optogenetics revealed the modulation of behaviors by OXT and AVP.
Conclusions:
- Genome complexity significantly impacts gene expression and regulation in the HNS.
- Integrated approaches using transcriptomics, mass spectrometry, and genetic models are crucial for HNS research.
- AVP and OXT play vital roles in cardiovascular function and behavior, offering therapeutic targets.
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