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Mukadam AA, Chester JA. Line- and sex-dependent effects of juvenile stress on contextual fear- and anxiety-related behavior in high- and low-alcohol-preferring mouse lines. Behav Brain Res 2024; 463:114899. [PMID: 38342379 PMCID: PMC10954351 DOI: 10.1016/j.bbr.2024.114899] [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: 07/28/2023] [Revised: 01/16/2024] [Accepted: 02/05/2024] [Indexed: 02/13/2024]
Abstract
Juvenile stress (JS) is a known risk factor for the development of alcohol use disorder (AUD) and post-traumatic stress disorder (PTSD), both of which are frequently co-morbid. Data suggest there may be common, genetically-influenced biological responses to stress that contribute to the development of both AUD and PTSD. The present study investigated the impact of JS on contextual fear learning and extinction, as well as corticosterone (CORT) responses before and after JS, before and after contextual fear conditioning (CFC), and after fear extinction in male and female high-alcohol-preferring (HAP2) and low-alcohol-preferring (LAP2) mouse lines. We also measured unconditioned anxiety-related behavior in the light-dark-transition test before CFC. HAP2 and LAP2 mice did not differ in fear acquisition, but HAP2 mice showed faster fear extinction compared to LAP2 mice. No effects of JS were seen in HAP2 mice, whereas in LAP2 mice, JS reduced fear acquisition in males and facilitated fear extinction in females. Females showed greater fear-related behavior relative to males, regardless of subgroup. HAP2 males demonstrated more anxiolytic-like responses than LAP2 males and LAP2 females demonstrated more anxiolytic-like responses than LAP2 males in the light-dark transition test. HAP2 and LAP2 mice did not differ in CORT during the juvenile stage; however, adult LAP2 mice showed greater CORT levels than HAP2 mice at baseline and after CFC and extinction testing. These findings build upon prior work in these unique mouse lines that differ in genetic propensity toward alcohol preference and provide new information regarding contextual fear learning and extinction mechanisms theorized to contribute to co-morbid AUD and PTSD.
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Affiliation(s)
- Arbaaz A Mukadam
- Department of Psychological Sciences, Purdue University, West Lafayette, IN, USA.
| | - Julia A Chester
- Department of Psychological Sciences, Purdue University, West Lafayette, IN, USA; Purdue Institute for Integrative Neuroscience, Purdue University, West Lafayette, IN, USA.
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Ko MJ, Chiang T, Mukadam AA, Mulia GE, Gutridge AM, Lin A, Chester JA, van Rijn RM. β-Arrestin-dependent ERK signaling reduces anxiety-like and conditioned fear-related behaviors in mice. Sci Signal 2021; 14:14/694/eaba0245. [PMID: 34344831 DOI: 10.1126/scisignal.aba0245] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
G protein-coupled receptors (GPCRs) are implicated in the regulation of fear and anxiety. GPCR signaling involves canonical G protein pathways but can also engage downstream kinases and effectors through scaffolding interactions mediated by β-arrestin. Here, we investigated whether β-arrestin signaling regulates anxiety-like and fear-related behavior in mice in response to activation of the GPCR δ-opioid receptor (δOR or DOR). Administration of β-arrestin-biased δOR agonists to male C57BL/6 mice revealed β-arrestin 2-dependent activation of extracellular signal-regulated kinases 1 and 2 (ERK1/2) in the dorsal hippocampus and amygdala and β-arrestin 1-dependent activation of ERK1/2 in the nucleus accumbens. In mice, β-arrestin-biased agonist treatment was associated with reduced anxiety-like and fear-related behaviors, with some overlapping and isoform-specific input. In contrast, applying a G protein-biased δOR agonist decreased ERK1/2 activity in all three regions as well as the dorsal striatum and was associated with increased fear-related behavior without effects on baseline anxiety. Our results indicate a complex picture of δOR neuromodulation in which β-arrestin 1- and 2-dependent ERK signaling in specific brain subregions suppresses behaviors associated with anxiety and fear and opposes the effects of G protein-biased signaling. Overall, our findings highlight the importance of noncanonical β-arrestin-dependent GPCR signaling in the regulation of these interrelated emotions.
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Affiliation(s)
- Mee Jung Ko
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, IN 47907, USA.,Purdue Institute for Integrative Neuroscience, West Lafayette, IN 47907, USA.,Purdue Interdisciplinary Life Sciences Graduate Program, West Lafayette, IN 47907, USA
| | - Terrance Chiang
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, IN 47907, USA
| | - Arbaaz A Mukadam
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, IN 47907, USA.,Department of Psychological Sciences, College of Health and Human Sciences, Purdue University, West Lafayette, IN 47907, USA
| | - Grace E Mulia
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, IN 47907, USA.,Purdue Interdisciplinary Life Sciences Graduate Program, West Lafayette, IN 47907, USA
| | - Anna M Gutridge
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, IN 47907, USA.,Purdue Institute for Integrative Neuroscience, West Lafayette, IN 47907, USA
| | - Angel Lin
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, IN 47907, USA
| | - Julia A Chester
- Purdue Institute for Integrative Neuroscience, West Lafayette, IN 47907, USA.,Purdue Interdisciplinary Life Sciences Graduate Program, West Lafayette, IN 47907, USA.,Department of Psychological Sciences, College of Health and Human Sciences, Purdue University, West Lafayette, IN 47907, USA
| | - Richard M van Rijn
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, IN 47907, USA. .,Purdue Institute for Integrative Neuroscience, West Lafayette, IN 47907, USA.,Purdue Interdisciplinary Life Sciences Graduate Program, West Lafayette, IN 47907, USA.,Purdue Institute for Drug Discovery, West Lafayette, IN 47907, USA
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Mukadam AA, Aravindakshan NP, East ALL. Comment on "Local, solvation pressures and conformational changes in ethylenediamine aqueous solutions probed using Raman spectroscopy" by M. Cáceres, A. Lobato, N. J. Mendoza, L. J. Bonales and V. G. Baonza, Phys. Chem. Chem. Phys., 2016, 18, 26192. Phys Chem Chem Phys 2020; 22:7119-7125. [PMID: 32202286 DOI: 10.1039/c9cp06589j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Liquid ethylenediamine contains both trans and gauche conformers, but there are conflicting claims in the literature that the relative abundance of gauche conformers is either completely quenched (J. Mol. Struct., 1999, 482, 639-646) or enhanced (Phys. Chem. Chem. Phys., 2016, 18, 26192-26198) in 1 M aqueous solutions. Density-functional-theory spectra predictions are employed here to resolve the conflict. In both the 1999 and 2016 reports, the effects seen were misinterpreted, and are instead due to loss of direct amine-amine H-bond interaction upon dilution, which appears to be complete at ∼0.66 mole fraction of water. Both trans and gauche conformers of ethylenediamine are concluded to be present, in both liquid and aqueous phases, with as yet no solid evidence for a shift in conformer ratio.
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Affiliation(s)
- A A Mukadam
- Department of Chemistry and Biochemistry, University of Regina, Regina, SK S4S 0A2, Canada.
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Ko MJ, Ganzen LC, Coskun E, Mukadam AA, Leung YF, van Rijn RM. A critical evaluation of TRPA1-mediated locomotor behavior in zebrafish as a screening tool for novel anti-nociceptive drug discovery. Sci Rep 2019; 9:2430. [PMID: 30787340 PMCID: PMC6382835 DOI: 10.1038/s41598-019-38852-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 01/11/2019] [Indexed: 12/12/2022] Open
Abstract
Current medications inadequately treat the symptoms of chronic pain experienced by over 50 million people in the United States, and may come with substantial adverse effects signifying the need to find novel treatments. One novel therapeutic target is the Transient Receptor Potential A1 channel (TRPA1), an ion channel that mediates nociception through calcium influx of sensory neurons. Drug discovery still relies heavily on animal models, including zebrafish, a species in which TRPA1 activation produces hyperlocomotion. Here, we investigated if this hyperlocomotion follows zebrafish TRPA1 pharmacology and evaluated the strengths and limitations of using TRPA1-mediated hyperlocomotion as potential preclinical screening tool for drug discovery. To support face validity of the model, we pharmacologically characterized mouse and zebrafish TRPA1 in transfected HEK293 cells using calcium assays as well as in vivo. TRPA1 agonists and antagonists respectively activated or blocked TRPA1 activity in HEK293 cells, mice, and zebrafish in a dose-dependent manner. However, our results revealed complexities including partial agonist activity of TRPA1 antagonists, bidirectional locomotor activity, receptor desensitization, and off-target effects. We propose that TRPA1-mediated hyperlocomotion in zebrafish larvae has the potential to be used as in vivo screening tool for novel anti-nociceptive drugs but requires careful evaluation of the TRPA1 pharmacology.
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Affiliation(s)
- Mee Jung Ko
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, West Lafayette, USA.,Purdue Institute for Integrative Neuroscience, West Lafayette, USA.,Purdue Interdisciplinary Life Sciences Graduate Program, West Lafayette, USA
| | - Logan C Ganzen
- Department of Biological Sciences, College of Science, West Lafayette, USA.,Purdue Institute for Integrative Neuroscience, West Lafayette, USA.,Purdue Interdisciplinary Life Sciences Graduate Program, West Lafayette, USA
| | - Emre Coskun
- Department of Biological Sciences, College of Science, West Lafayette, USA
| | - Arbaaz A Mukadam
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, West Lafayette, USA
| | - Yuk Fai Leung
- Department of Biological Sciences, College of Science, West Lafayette, USA.,Purdue Institute for Integrative Neuroscience, West Lafayette, USA.,Purdue Interdisciplinary Life Sciences Graduate Program, West Lafayette, USA.,Purdue Institute for Drug Discovery, West Lafayette, USA.,Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, West Lafayette, IN, 47907, USA
| | - Richard M van Rijn
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, West Lafayette, USA. .,Purdue Institute for Integrative Neuroscience, West Lafayette, USA. .,Purdue Interdisciplinary Life Sciences Graduate Program, West Lafayette, USA. .,Purdue Institute for Drug Discovery, West Lafayette, USA.
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