Abstract
Background
Recent advances in neuroscience tools for single-cell molecular profiling of brain neurons have revealed an enormous spectrum of neuronal subpopulations within the neuroendocrine hypothalamus, highlighting the remarkable molecular and cellular heterogeneity of this brain area.
Rationale
Neuronal diversity in the hypothalamus reflects the high functional plasticity of this brain area, where multiple neuronal populations flexibly integrate a variety of physiological outputs, including energy balance, stress and fertility, through crosstalk mechanisms with peripheral hormones. Intrinsic functional heterogeneity is also observed within classically ‘defined’ subpopulations of neuroendocrine neurons, including subtypes with distinct neurochemical signatures, spatial organisation and responsiveness to hormonal cues.
Aim
The aim of this review is to critically evaluate past and current research on the functional diversity of hypothalamic neuroendocrine neurons and their plasticity. It focuses on how this neuronal plasticity in this brain area relates to metabolic control, feeding regulation and interactions with stress and fertility-related neural circuits.
Conclusion
Our analysis provides an original framework for improving our understanding of the hypothalamic regulation of hormone function and the development of neuroendocrine diseases.
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Data availability
All data cited in this article are publicly available online.
Abbreviations
- 3V:
-
Third ventricle
- ACTH:
-
Adrenocorticotropic hormone
- AgRP:
-
Agouti-related protein
- ARC:
-
Arcuate nucleus
- AVP:
-
Arginine vasopressin
- AVPV:
-
Anteroventral periventricular nucleus
- CRH:
-
Corticotropin-releasing hormone
- Crhr :
-
Corticotropin-releasing hormone receptor
- DMH:
-
Dorsal medial hypothalamus
- Drd1 :
-
Dopamine receptor D1
- DYN:
-
Dynorphin
- ECM:
-
Extracellular matrix
- ECS:
-
Extracellular space
- ERα:
-
Oestrogen receptor alpha
- FSH:
-
Follicle-stimulating hormone
- GABA:
-
Gamma-aminobutyric acid
- GLP1:
-
Glucagon-like peptide-1
- Glp1r :
-
Glucagon-like peptide-1 receptor
- GnRH:
-
Gonadotropin hormone-releasing hormone
- HFD:
-
High-fat diet
- HPA:
-
Hypothalamic-pituitary-adrenal axis
- HPG:
-
Hypothalamic-pituitary–gonadal axis
- Kiss1:
-
Kisspeptin
- Lepr:
-
Leptin receptor
- LH:
-
Luteinising hormone
- MC4R:
-
Melanocortin 4 receptor
- ME:
-
Median eminence
- mENK:
-
Methionine enkephalin
- MePO:
-
Median preoptic nucleus
- NKB:
-
Neurokinin B
- NPY:
-
Neuropeptide Y
- OV:
-
Organum vasculosum of the lamina terminalis
- OXT:
-
Oxytocin
- Pdyn :
-
Prodynorphin
- POMC:
-
Proopiomelanocortin
- PVN:
-
Paraventricular nucleus
- RCA:
-
Retrochiasmatic area
- Rprm :
-
Reprimo
- SST:
-
Somatostatin
- TH:
-
Tyrosine hydroxylase
- VMH:
-
Ventral medial hypothalamus
- VMHvl:
-
Ventrolateral division of VMH
- αMSH:
-
Alpha-melanocyte-stimulating hormone
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Acknowledgements
CQ acknowledges INSERM, the European Research Council (ERCcog project 101124230 — Ghostbuster), the University of Bordeaux, Agencie Nationale Recherche (ANR-20-CE14-0046), French Societies of Endocrinology, Nutrition, and Diabetes (SFE, SFN, and SFD), Fyssen Foundation, and Institut Benjamin Delessert.
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THL, JCN, CQ wrote, revised, and amended the manuscript, JCN designed the graphic. CQ conceptualised the work and the ideas. All authors have read and agreed to the published version of the manuscript.
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Lee, T.H., Nicolas, JC. & Quarta, C. Molecular and functional mapping of the neuroendocrine hypothalamus: a new era begins. J Endocrinol Invest (2024). https://doi.org/10.1007/s40618-024-02411-5
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DOI: https://doi.org/10.1007/s40618-024-02411-5