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Aukema RJ, Petrie GN, Matarasso AK, Baglot SL, Molina LA, Füzesi T, Kadhim S, Nastase AS, Rodriguez Reyes I, Bains JS, Morena M, Bruchas MR, Hill MN. Identification of a stress-responsive subregion of the basolateral amygdala in male rats. Neuropsychopharmacology 2024:10.1038/s41386-024-01927-x. [PMID: 39117904 DOI: 10.1038/s41386-024-01927-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 06/14/2024] [Accepted: 07/10/2024] [Indexed: 08/10/2024]
Abstract
The basolateral amygdala (BLA) is reliably activated by psychological stress and hyperactive in conditions of pathological stress or trauma; however, subsets of BLA neurons are also readily activated by rewarding stimuli and can suppress fear and avoidance behaviours. The BLA is highly heterogeneous anatomically, exhibiting continuous molecular and connectivity gradients throughout the entire structure. A critical gap remains in understanding the anatomical specificity of amygdala subregions, circuits, and cell types explicitly activated by acute stress and how they are dynamically activated throughout stimulus exposure. Using a combination of topographical mapping for the activity-responsive protein FOS and fiber photometry to measure calcium transients in real-time, we sought to characterize the spatial and temporal patterns of BLA activation in response to a range of novel stressors (shock, swim, restraint, predator odour) and non-aversive, but novel stimuli (crackers, citral odour). We report four main findings: (1) the BLA exhibits clear spatial activation gradients in response to novel stimuli throughout the medial-lateral and dorsal-ventral axes, with aversive stimuli strongly biasing activation towards medial aspects of the BLA; (2) novel stimuli elicit distinct temporal activation patterns, with stressful stimuli exhibiting particularly enhanced or prolonged temporal activation patterns; (3) changes in BLA activity are associated with changes in behavioural state; and (4) norepinephrine enhances stress-induced activation of BLA neurons via the ß-noradrenergic receptor. Moving forward, it will be imperative to combine our understanding of activation gradients with molecular and circuit-specificity.
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Affiliation(s)
- Robert J Aukema
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB, T2N 4N1, Canada
- Mathison Centre for Mental Health, University of Calgary, Calgary, AB, T2N 4N1, Canada
| | - Gavin N Petrie
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB, T2N 4N1, Canada
- Mathison Centre for Mental Health, University of Calgary, Calgary, AB, T2N 4N1, Canada
| | - Avi K Matarasso
- Bioengineering, University of Washington, Seattle, WA, 98195, USA
- Anesthesiology and Pain Medicine, University of Washington, Seattle, WA, 98195, USA
- UW Center for the Neurobiology of Addiction, Pain, and Emotion (NAPE), University of Washington, Seattle, WA, 98195, USA
| | - Samantha L Baglot
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB, T2N 4N1, Canada
- Mathison Centre for Mental Health, University of Calgary, Calgary, AB, T2N 4N1, Canada
| | - Leonardo A Molina
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB, T2N 4N1, Canada
| | - Tamás Füzesi
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB, T2N 4N1, Canada
| | - Sandra Kadhim
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB, T2N 4N1, Canada
- Mathison Centre for Mental Health, University of Calgary, Calgary, AB, T2N 4N1, Canada
| | - Andrei S Nastase
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB, T2N 4N1, Canada
- Mathison Centre for Mental Health, University of Calgary, Calgary, AB, T2N 4N1, Canada
| | - Itzel Rodriguez Reyes
- Anesthesiology and Pain Medicine, University of Washington, Seattle, WA, 98195, USA
- UW Center for the Neurobiology of Addiction, Pain, and Emotion (NAPE), University of Washington, Seattle, WA, 98195, USA
| | - Jaideep S Bains
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB, T2N 4N1, Canada
| | - Maria Morena
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB, T2N 4N1, Canada
- Mathison Centre for Mental Health, University of Calgary, Calgary, AB, T2N 4N1, Canada
- Department of Physiology and Pharmacology, Sapienza University of Rome, Rome, 00185, Italy
- Neuropsychopharmacology Unit, European Center for Brain Research, Santa Lucia Foundation, Rome, 00143, Italy
| | - Michael R Bruchas
- Bioengineering, University of Washington, Seattle, WA, 98195, USA
- Anesthesiology and Pain Medicine, University of Washington, Seattle, WA, 98195, USA
- UW Center for the Neurobiology of Addiction, Pain, and Emotion (NAPE), University of Washington, Seattle, WA, 98195, USA
| | - Matthew N Hill
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB, T2N 4N1, Canada.
- Mathison Centre for Mental Health, University of Calgary, Calgary, AB, T2N 4N1, Canada.
- Department of Cell Biology and Anatomy, University of Calgary, Calgary, AB, T2N 4N1, Canada.
- Department of Psychiatry, University of Calgary, Calgary, AB, T2N 4N1, Canada.
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Ornelas LC, Besheer J. Predator odor stress reactivity, alcohol drinking and the endocannabinoid system. Neurobiol Stress 2024; 30:100634. [PMID: 38623398 PMCID: PMC11016807 DOI: 10.1016/j.ynstr.2024.100634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 03/26/2024] [Accepted: 03/30/2024] [Indexed: 04/17/2024] Open
Abstract
Post-traumatic stress disorder (PTSD) and alcohol use disorder (AUD) are highly comorbid and individual differences in response to stress suggest resilient and susceptible populations. Using animal models to target neurobiological mechanisms associated with individual variability in stress coping responses and the relationship with subsequent increases in alcohol consumption has important implications for the field of traumatic stress and alcohol disorders. The current review discusses the unique advantages of utilizing predator odor stressor exposure models, specifically using 2,5-dihydro-2,4,5-trimethylthiazoline (TMT) on better understanding PTSD pathophysiology and neurobiological mechanisms associated with stress reactivity and subsequent increases in alcohol drinking. Furthermore, there has been increasing interest regarding the role of the endocannabinoid system in modulating behavioral responses to stress with an emphasis on stress coping and individual differences in stress-susceptibility. Therefore, the current review focuses on the topic of endocannabinoid modulation of stress reactive behaviors during and after exposure to a predator odor stressor, with implications on modulating distinctly different behavioral coping strategies.
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Affiliation(s)
- Laura C. Ornelas
- Bowles Center for Alcohol Studies, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Joyce Besheer
- Bowles Center for Alcohol Studies, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
- Department of Psychiatry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
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Nasretdinov A, Jappy D, Vazetdinova A, Valiullina-Rakhmatullina F, Rozov A. Acute stress modulates hippocampal to entorhinal cortex communication. Front Cell Neurosci 2023; 17:1327909. [PMID: 38145281 PMCID: PMC10740169 DOI: 10.3389/fncel.2023.1327909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 11/24/2023] [Indexed: 12/26/2023] Open
Abstract
Feed-forward inhibition is vital in the transfer and processing of synaptic information within the hippocampal-entorhinal loop by controlling the strength and direction of excitation flow between different neuronal populations and individual neurons. While the cellular targets in the hippocampus that receive excitatory inputs from the entorhinal cortex have been well studied, and the role of feedforward inhibitory neurons has been attributed to neurogliafom cells, the cortical interneurons providing feed-forward control over receiving layer V in the entorhinal cortex remain unknown. We used sharp-wave ripple oscillations as a natural excitatory stimulus of the entorhinal cortex, driven by the hippocampus, to study the function of synaptic interactions between neurons in the deep layers of the entorhinal cortex. We discovered that CB1R-expressing interneurons in the deep layers of the entorhinal cortex constitute the major relay station that translates hippocampal excitation into efficient inhibition of cortical pyramidal cells. The impact of inhibition provided by these interneurons is under strong endocannabinoid control and can be drastically reduced either by enhanced activity of postsynaptic targets or by stress-induced elevation of cannabinoids.
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Affiliation(s)
- Azat Nasretdinov
- Laboratory of Neurobiology, Kazan Federal University, Kazan, Russia
| | - David Jappy
- Federal Center of Brain Research and Neurotechnologies, Moscow, Russia
- Institute of Neuroscience, Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, Russia
| | - Alina Vazetdinova
- Laboratory of Neurobiology, Kazan Federal University, Kazan, Russia
- Federal Center of Brain Research and Neurotechnologies, Moscow, Russia
| | - Fliza Valiullina-Rakhmatullina
- Laboratory of Neurobiology, Kazan Federal University, Kazan, Russia
- Federal Center of Brain Research and Neurotechnologies, Moscow, Russia
| | - Andrei Rozov
- Federal Center of Brain Research and Neurotechnologies, Moscow, Russia
- Department of Physiology and Pathophysiology, Heidelberg University, Heidelberg, Germany
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