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Madrid LI, Hafey K, Bandhavkar S, Bodea GO, Jimenez-Martin J, Milne M, Walker TL, Faulkner GJ, Coulson EJ, Jhaveri DJ. Stimulation of the muscarinic receptor M4 regulates neural precursor cell proliferation and promotes adult hippocampal neurogenesis. Development 2024; 151:dev201835. [PMID: 38063486 PMCID: PMC10820734 DOI: 10.1242/dev.201835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 12/01/2023] [Indexed: 01/03/2024]
Abstract
Cholinergic signaling plays a crucial role in the regulation of adult hippocampal neurogenesis; however, the mechanisms by which acetylcholine mediates neurogenic effects are not completely understood. Here, we report the expression of muscarinic acetylcholine receptor subtype M4 (M4 mAChR) on a subpopulation of neural precursor cells (NPCs) in the adult mouse hippocampus, and demonstrate that its pharmacological stimulation promotes their proliferation, thereby enhancing the production of new neurons in vivo. Using a targeted ablation approach, we also show that medial septum (MS) and the diagonal band of Broca (DBB) cholinergic neurons support both the survival and morphological maturation of adult-born neurons in the mouse hippocampus. Although the systemic administration of an M4-selective allosteric potentiator fails to fully rescue the MS/DBB cholinergic lesion-induced decrease in hippocampal neurogenesis, it further exacerbates the impairment in the morphological maturation of adult-born neurons. Collectively, these findings reveal stage-specific roles of M4 mAChRs in regulating adult hippocampal neurogenesis, uncoupling their positive role in enhancing the production of new neurons from the M4-induced inhibition of their morphological maturation, at least in the context of cholinergic signaling dysfunction.
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Affiliation(s)
- Lidia I. Madrid
- Queensland Brain Institute, The University of Queensland, Brisbane QLD 4072, Queensland, Australia
| | - Katelyn Hafey
- Mater Research Institute - The University of Queensland, Translational Research Institute, Brisbane QLD 4102, Queensland, Australia
| | - Saurabh Bandhavkar
- Queensland Brain Institute, The University of Queensland, Brisbane QLD 4072, Queensland, Australia
- Mater Research Institute - The University of Queensland, Translational Research Institute, Brisbane QLD 4102, Queensland, Australia
| | - Gabriela O. Bodea
- Queensland Brain Institute, The University of Queensland, Brisbane QLD 4072, Queensland, Australia
- Mater Research Institute - The University of Queensland, Translational Research Institute, Brisbane QLD 4102, Queensland, Australia
| | - Javier Jimenez-Martin
- Queensland Brain Institute, The University of Queensland, Brisbane QLD 4072, Queensland, Australia
| | - Michael Milne
- School of Biomedical Sciences, The University of Queensland, Brisbane QLD 4072, Queensland, Australia
| | - Tara L. Walker
- Queensland Brain Institute, The University of Queensland, Brisbane QLD 4072, Queensland, Australia
| | - Geoffrey J. Faulkner
- Queensland Brain Institute, The University of Queensland, Brisbane QLD 4072, Queensland, Australia
- Mater Research Institute - The University of Queensland, Translational Research Institute, Brisbane QLD 4102, Queensland, Australia
| | - Elizabeth J. Coulson
- Queensland Brain Institute, The University of Queensland, Brisbane QLD 4072, Queensland, Australia
- School of Biomedical Sciences, The University of Queensland, Brisbane QLD 4072, Queensland, Australia
| | - Dhanisha J. Jhaveri
- Queensland Brain Institute, The University of Queensland, Brisbane QLD 4072, Queensland, Australia
- Mater Research Institute - The University of Queensland, Translational Research Institute, Brisbane QLD 4102, Queensland, Australia
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Madrid LI, Jimenez-Martin J, Coulson EJ, Jhaveri DJ. Cholinergic regulation of adult hippocampal neurogenesis and hippocampus-dependent functions. Int J Biochem Cell Biol 2021; 134:105969. [PMID: 33727042 DOI: 10.1016/j.biocel.2021.105969] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 03/10/2021] [Indexed: 10/21/2022]
Abstract
The production and circuit integration of new neurons is one of the defining features of the adult mammalian hippocampus. A wealth of evidence has established that adult hippocampal neurogenesis is exquisitely sensitive to neuronal activity-mediated regulation. How these signals are interpreted and contribute to neurogenesis and hippocampal functions has been a subject of immense interest. In particular, neurotransmitters, in addition to their synaptic roles, have been shown to offer important trophic support. Amongst these, acetylcholine, which has a prominent role in cognition, has been implicated in regulating neurogenesis. In this review, we appraise the evidence linking the contribution of cholinergic signalling to the regulation of adult hippocampal neurogenesis and hippocampus-dependent functions. We discuss open questions that need to be addressed to gain a deeper mechanistic understanding of the role and translational potential of acetylcholine and its receptors in regulating this form of cellular neuroplasticity.
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Affiliation(s)
- Lidia I Madrid
- Queensland Brain Institute, The University of Queensland, Brisbane, Queensland, Australia
| | - Javier Jimenez-Martin
- Queensland Brain Institute, The University of Queensland, Brisbane, Queensland, Australia
| | - Elizabeth J Coulson
- Queensland Brain Institute, The University of Queensland, Brisbane, Queensland, Australia; School of Biomedical Sciences, The University of Queensland, Brisbane, Queensland, Australia
| | - Dhanisha J Jhaveri
- Queensland Brain Institute, The University of Queensland, Brisbane, Queensland, Australia; Mater Research Institute - The University of Queensland, Translational Research Institute, Brisbane, Queensland, Australia.
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