Sex-specific behavioural deficits induced at early life by prenatal exposure to the cannabinoid receptor agonist WIN55, 212-2 depend on mGlu5 receptor signalling.
Br J Pharmacol
; 177(2): 449-463, 2020 01.
Article
en En
| MEDLINE
| ID: mdl-31658362
ABSTRACT
BACKGROUND AND PURPOSE:
Marijuana is the illicit drug most commonly used among pregnant and breastfeeding women. Different studies reported long-term adverse effects induced by in utero exposure to the main component of marijuana, Δ9 -tetrahydrocannabinol (THC), both in rodents and in humans. However, little is known about any potential sex-dependent effects of marijuana consumption during pregnancy on newborns at early developmental ages. EXPERIMENTALAPPROACH:
We studied the effects of prenatal exposure to the cannabinoid receptor agonist WIN55,212-2 (WIN; 0.5 mg·kg-1 from GD5 to GD20) on the emotional reactivity and cognitive performance of male and female rat offspring from infancy through adolescence and tested the role of mGlu5 receptor signalling in the observed effects. KEYRESULTS:
Prenatally WIN-exposed male infant pups emitted less isolation-induced ultrasonic vocalizations compared with male control pups, when separated from the dam and siblings and showed increased locomotor activity while females were spared. These effects were normalized when male pups were treated with the positive allosteric modulator of mGlu5 receptor CDPPB. When tested at the prepubertal and pubertal periods, WIN-prenatally exposed rats of both sexes did not show any difference in social play behaviour, anxiety and temporal order memory. CONCLUSIONS AND IMPLICATIONS We reveal a previously undisclosed sexual divergence in the consequences of fetal cannabinoids on newborns at early developmental ages, which is dependent on mGlu5 receptor signalling. These results provide new impetus for the urgent need to investigate the functional and behavioural substrates of prenatal cannabinoid exposure in both the male offspring and the female offspring.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Efectos Tardíos de la Exposición Prenatal
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Conducta Animal
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Encéfalo
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Morfolinas
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Cognición
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Benzoxazinas
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Emociones
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Agonistas de Receptores de Cannabinoides
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Receptor del Glutamato Metabotropico 5
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Naftalenos
Límite:
Animals
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Pregnancy
Idioma:
En
Revista:
Br J Pharmacol
Año:
2020
Tipo del documento:
Article
País de afiliación:
Italia