期刊
JOURNAL OF BIOSCIENCES
卷 47, 期 4, 页码 -出版社
INDIAN ACAD SCIENCES
DOI: 10.1007/s12038-022-00308-0
关键词
Clozapine-N-oxide (CNO); DREADD; elevated plus maze; forced swim test; GABA; hM3Dq; open field test; PV-positive neuron; tail suspension test
类别
资金
- Department of Atomic Energy
- Sree Padmavathi Venkateswara Foundation (SreePVF),Vijayawada, Andhra Pradesh [RTI4003]
The study found that altering neuronal activity within PV-positive interneurons during the critical postnatal developmental window can shape the emergence of anxio-depressive behaviors in adulthood, with sex playing a key role in determining behavioral outcomes.
Animal models of early adversity or neurodevelopmental disorders are associated with altered parvalbumin (PV)-positive inhibitory interneuron number and function, correlated with a dysregulated excitation-inhibition (E/I) balance that is implicated in the pathophysiology of neuropsychiatric disorders. We sought to address whether altering neuronal activity of PV-positive interneurons during the postnatal developmental window influences the emergence of anxio-depressive behaviors in adulthood, which are known to be perturbed in models of early adversity and neurodevelopmental disorders. We used a PV-Cre::hM3Dq-DREADD bigenic mouse line that selectively expresses the hM3Dq-DREADD receptor in PV-positive interneurons, and chemogenetically enhanced Gq signaling in PV-positive interneurons during the postnatal window via administration of the DREADD agonist, clozapine-N-oxide. Immunofluorescence studies have indicated the selective expression of hM3Dq-DREADD in PV-positive interneurons in limbic circuits, and have revealed a reduction in expression of the neuronal activity marker, c-Fos, in these circuits, following chemogenetic hM3Dq-DREADD-mediated activation of PV-positive inhibitory interneurons. We noted no change in either growth or sensorimotor reflex milestones following chronic hM3Dq-DREADD-mediated chemogenetic activation of PV-positive inhibitory interneurons in postnatal life. Adult male and female PV-Cre::hM3Dq-DREADD bigenic mice with a history of postnatal chemogenetic activation of PV-positive interneurons exhibited a reduction in anxiety and despair-like behavior in adulthood, which was noted in both a behavioral task- and sex-dependent manner. These results indicate that altering neuronal activity within PV-positive interneurons during the critical postnatal developmental window can shape the emergence of anxio-depressive behaviors in adulthood, with sex as a variable playing a key role in determining behavioral outcomes.
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