|
1
|
Kiritoshi T, Yakhnitsa V, Singh S, Wilson TD, Chaudhry S, Neugebauer B, Torres-Rodriguez JM, Lin JL, Carrasquillo Y, Neugebauer V. Cells and circuits for amygdala neuroplasticity in the transition to chronic pain. Cell Rep 2024; 43:114669. [PMID: 39178115 PMCID: PMC11473139 DOI: 10.1016/j.celrep.2024.114669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 07/04/2024] [Accepted: 08/06/2024] [Indexed: 08/25/2024] Open
Abstract
Maladaptive plasticity is linked to the chronification of diseases such as pain, but the transition from acute to chronic pain is not well understood mechanistically. Neuroplasticity in the central nucleus of the amygdala (CeA) has emerged as a mechanism for sensory and emotional-affective aspects of injury-induced pain, although evidence comes from studies conducted almost exclusively in acute pain conditions and agnostic to cell type specificity. Here, we report time-dependent changes in genetically distinct and projection-specific CeA neurons in neuropathic pain. Hyperexcitability of CRF projection neurons and synaptic plasticity of parabrachial (PB) input at the acute stage shifted to hyperexcitability without synaptic plasticity in non-CRF neurons at the chronic phase. Accordingly, chemogenetic inhibition of the PB→CeA pathway mitigated pain-related behaviors in acute, but not chronic, neuropathic pain. Cell-type-specific temporal changes in neuroplasticity provide neurobiological evidence for the clinical observation that chronic pain is not simply the prolonged persistence of acute pain.
Collapse
Affiliation(s)
- Takaki Kiritoshi
- Department of Pharmacology and Neuroscience, Texas Tech University Health Sciences Center, School of Medicine, Lubbock, TX 79430, USA
| | - Vadim Yakhnitsa
- Department of Pharmacology and Neuroscience, Texas Tech University Health Sciences Center, School of Medicine, Lubbock, TX 79430, USA
| | - Sudhuman Singh
- National Center for Complementary and Integrative Health, National Institutes of Health, Bethesda, MD 20892, USA
| | - Torri D Wilson
- National Center for Complementary and Integrative Health, National Institutes of Health, Bethesda, MD 20892, USA
| | - Sarah Chaudhry
- National Center for Complementary and Integrative Health, National Institutes of Health, Bethesda, MD 20892, USA
| | - Benjamin Neugebauer
- National Center for Complementary and Integrative Health, National Institutes of Health, Bethesda, MD 20892, USA
| | - Jeitzel M Torres-Rodriguez
- National Center for Complementary and Integrative Health, National Institutes of Health, Bethesda, MD 20892, USA
| | - Jenny L Lin
- National Center for Complementary and Integrative Health, National Institutes of Health, Bethesda, MD 20892, USA
| | - Yarimar Carrasquillo
- National Center for Complementary and Integrative Health, National Institutes of Health, Bethesda, MD 20892, USA; National Institute on Drug Abuse, National Institutes of Health, Bethesda, MD 20892, USA.
| | - Volker Neugebauer
- Department of Pharmacology and Neuroscience, Texas Tech University Health Sciences Center, School of Medicine, Lubbock, TX 79430, USA; Garrison Institute on Aging, Texas Tech University Health Sciences Center, School of Medicine, Lubbock, TX 79430, USA; Center of Excellence for Translational Neuroscience and Therapeutics, Texas Tech University Health Sciences Center, School of Medicine, Lubbock, TX 79430, USA.
| |
Collapse
|
|
2
|
Pain-Associated Neural Plasticity in the Parabrachial to Central Amygdala Circuit : Pain Changes the Brain, and the Brain Changes the Pain. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1099:157-166. [PMID: 30306523 DOI: 10.1007/978-981-13-1756-9_14] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
In addition to the canonical spino-thalamo-cortical pathway, lines of recently accumulated anatomical and physiological evidence suggest that projections originating in nociception-specific neurons in lamina I of the dorsal horn or the spinal nucleus of the trigeminal nerve to the lateral parabrachial nucleus (LPB) and then to the central amygdala (CeA) play essential roles in the nociception-emotion link and its tightening in chronic pain. With recent advances in the artificial manipulation of central neuronal activity, such as those with optogenetics, it is now possible to address many unanswered questions regarding the molecular and cellular mechanisms underlying the plastic changes in this pathway and their role in the pain chronification process.
Collapse
|