Early Development of Hypothalamic Neurons Expressing Proopiomelanocortin Peptides, Neuropeptide Y, and Kisspeptin in Fetal Rhesus Macaques.
Quick Facts
What This Study Found
In fetal rhesus macaques, appetite-regulating hypothalamic neurons (POMC and NPY) develop much earlier than previously thought, with POMC neurons appearing by day 32-34 and NPY neurons by day 44 of gestation.
Key Numbers
Beta-endorphin/alpha-MSH neurons: day 32-34 of gestation (lateral basal hypothalamus), migrated to medial basal hypothalamus by day 45. NPY neurons: day 44. Kisspeptin: few cells at day 44, expanded distribution by day 70 and 130.
How They Did This
Immunohistochemistry for beta-endorphin, alpha-MSH, NPY, and kisspeptin in fetal rhesus macaque brains at multiple gestational ages. Both male and female fetuses examined.
Why This Research Matters
Understanding when appetite-control brain circuits form in primates informs research on how maternal nutrition and exposures during pregnancy may permanently alter offspring metabolism and obesity risk.
What This Study Doesn't Tell Us
Descriptive neuroanatomical study. Rhesus macaque brain development similar but not identical to human. No functional testing of these neurons. Small numbers of fetal specimens at each age.
Trust & Context
- Original Title:
- Early Development of Hypothalamic Neurons Expressing Proopiomelanocortin Peptides, Neuropeptide Y, and Kisspeptin in Fetal Rhesus Macaques.
- Published In:
- eNeuro, 12(7) (2025)
- Authors:
- Rønnekleiv, Oline K(3), Bosch, Martha A
- Database ID:
- RPEP-13344
Evidence Hierarchy
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Cite This Study
https://rethinkpeptides.com/research/RPEP-13344APA
Rønnekleiv, Oline K; Bosch, Martha A. (2025). Early Development of Hypothalamic Neurons Expressing Proopiomelanocortin Peptides, Neuropeptide Y, and Kisspeptin in Fetal Rhesus Macaques.. eNeuro, 12(7). https://doi.org/10.1523/ENEURO.0087-25.2025
MLA
Rønnekleiv, Oline K, et al. "Early Development of Hypothalamic Neurons Expressing Proopiomelanocortin Peptides, Neuropeptide Y, and Kisspeptin in Fetal Rhesus Macaques.." eNeuro, 2025. https://doi.org/10.1523/ENEURO.0087-25.2025
RethinkPeptides
RethinkPeptides Research Database. "Early Development of Hypothalamic Neurons Expressing Proopio..." RPEP-13344. Retrieved from https://rethinkpeptides.com/research/ronnekleiv-2025-early-development-of-hypothalamic
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkPeptides research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.