Cited by 282Cannabis and Cannabinoid ResearchNeuroinflammation and Neurodegeneration MechanismsNeuroendocrine regulation and behavior

The DOI matches its Crossref record; 65 of the 65 references it cites were found in a registry or an index.

Microglial Phagocytosis of Newborn Cells Is Induced by Endocannabinoids and Sculpts Sex Differences in Juvenile Rat Social Play

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Abstract

Brain sex differences are established developmentally and generate enduring changes in circuitry and behavior. Steroid-mediated masculinization of the rat amygdala during perinatal development produces higher levels of juvenile rough-and-tumble play by males. This sex difference in social play is highly conserved across mammals, yet the mechanisms by which it is established are unknown. Here, we report that androgen-induced increases in endocannabinoid tone promote microglia phagocytosis during a critical period of amygdala development. Phagocytic microglia engulf more viable newborn cells in males; in females, less phagocytosis allows more astrocytes to survive to the juvenile age. Blocking complement-dependent phagocytosis in males increases astrocyte survival and prevents masculinization of play. Moreover, increased astrocyte density in the juvenile amygdala reduces neuronal excitation during play. These findings highlight novel mechanisms of brain development whereby endocannabinoids induce microglia phagocytosis to regulate newborn astrocyte number and shape the sexual differentiation of social circuitry and behavior. VIDEO ABSTRACT.

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Crossref · 10.1016/j.neuron.2019.02.006

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Authors
VanRyzin, J. W., Marquardt, A. E., Argue, K. J., Vecchiarelli, H. A., Ashton, S. E., Arambula, S. E., Hill, M. N., & McCarthy, M. M.
Affiliations
  • University of Maryland, Baltimore (US)
  • University of Calgary (CA)
Corresponding author
McCarthy, Margaret M.
Venue
Neuron
Publisher
Elsevier BV
Published
2019-04
Volume
102
Issue
2
Pages
435-449.e6
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2918315099
Cited by
272
References
65
Citations by year
2026: 20 · 2025: 31 · 2024: 48 · 2023: 44 · 2022: 41 · 2021: 36 · 2020: 38 · 2019: 14
FWCI
19.53
Type
journal article
Language
en
Update notices
erratum (2022-04-06)
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (R01MH52716, R01DA039062)
  • Natural Sciences and Engineering Council of Canada
  • Canadian Institutes of Health Research
  • CIHR
  • Alberta Innovates
  • BranchOut Neurological Foundation
Topics
  • Health Sciences › Medicine › Pharmacology (medical) › Cannabis and Cannabinoid Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Neuroendocrine regulation and behavior
Keywords
microglial phagocytosis, endocannabinoids, sex differences, social play, rough-and-tumble play, amygdala development, masculinization, androgens, astrocyte survival, neuronal excitation, social behavior, sexual differentiation of the brain
MeSH terms
Amygdala, Androgen Antagonists, Androgens, Animals, Animals, Newborn, Arachidonic Acids, Astrocytes, Behavior, Animal, Cell Survival, Complement System Proteins, Female, Flutamide, Glycerides, Male, Phagocytosis, Play and Playthings, Sex Characteristics, Social Behavior, Testosterone, Microglia, Rats, Polyunsaturated Alkamides, Endocannabinoids

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