1
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Duff IT, Krolick KN, Mahmoud HM, Chidambaran V. Current Evidence for Biological Biomarkers and Mechanisms Underlying Acute to Chronic Pain Transition across the Pediatric Age Spectrum. J Clin Med 2023; 12:5176. [PMID: 37629218 PMCID: PMC10455285 DOI: 10.3390/jcm12165176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 08/01/2023] [Accepted: 08/05/2023] [Indexed: 08/27/2023] Open
Abstract
Chronic pain is highly prevalent in the pediatric population. Many factors are involved in the transition from acute to chronic pain. Currently, there are conceptual models proposed, but they lack a mechanistically sound integrated theory considering the stages of child development. Objective biomarkers are critically needed for the diagnosis, risk stratification, and prognosis of the pathological stages of pain chronification. In this article, we summarize the current evidence on mechanisms and biomarkers of acute to chronic pain transitions in infants and children through the developmental lens. The goal is to identify gaps and outline future directions for basic and clinical research toward a developmentally informed theory of pain chronification in the pediatric population. At the outset, the importance of objective biomarkers for chronification of pain in children is outlined, followed by a summary of the current evidence on the mechanisms of acute to chronic pain transition in adults, in order to contrast with the developmental mechanisms of pain chronification in the pediatric population. Evidence is presented to show that chronic pain may have its origin from insults early in life, which prime the child for the development of chronic pain in later life. Furthermore, available genetic, epigenetic, psychophysical, electrophysiological, neuroimaging, neuroimmune, and sex mechanisms are described in infants and older children. In conclusion, future directions are discussed with a focus on research gaps, translational and clinical implications. Utilization of developmental mechanisms framework to inform clinical decision-making and strategies for prevention and management of acute to chronic pain transitions in children, is highlighted.
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Affiliation(s)
- Irina T. Duff
- Department of Neurosurgery, Johns Hopkins University, Baltimore, MD 21218, USA;
| | - Kristen N. Krolick
- Department of Anesthesia, Cincinnati Children’s Hospital, Cincinnati, OH 45242, USA; (K.N.K.); (H.M.M.)
| | - Hana Mohamed Mahmoud
- Department of Anesthesia, Cincinnati Children’s Hospital, Cincinnati, OH 45242, USA; (K.N.K.); (H.M.M.)
| | - Vidya Chidambaran
- Department of Anesthesia, Cincinnati Children’s Hospital, Cincinnati, OH 45242, USA; (K.N.K.); (H.M.M.)
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2
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Nakama N, Usui N, Doi M, Shimada S. Early life stress impairs brain and mental development during childhood increasing the risk of developing psychiatric disorders. Prog Neuropsychopharmacol Biol Psychiatry 2023; 126:110783. [PMID: 37149280 DOI: 10.1016/j.pnpbp.2023.110783] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 04/28/2023] [Accepted: 05/03/2023] [Indexed: 05/08/2023]
Abstract
In recent years, it has become known that stress in childhood, called early life stress (ELS), affects the mental health of children, adolescents, and adults. Child maltreatment (CM) is an inappropriate form of childcare that interferes with children's normal brain and mind development. Previous studies have reported that CM severely affects brain development and function. For example, ELS causes brain vulnerability and increases the risk of developing psychiatric disorders. In addition, it is known that the different types and timing of abuse have different effects on the brain. Epidemiological and clinical studies are being conducted to understand the mechanism underlying abuse on a child's mental health and appropriate brain development; however, they are not fully understood. Therefore, studies using animal models, as well as humans, have been conducted to better understand the effects of CM. In this review, we discuss the effects of comparing previous findings on different types of CM in human and animal models. However, it should be noted that there are differences between animal models and humans such as genetic polymorphism and susceptibility to stress. Our review provides the latest insights into the negative effects of CM on children's development and on psychiatric disorders in adulthood.
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Affiliation(s)
- Nanako Nakama
- Department of Neuroscience and Cell Biology, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan
| | - Noriyoshi Usui
- Department of Neuroscience and Cell Biology, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan; CoMIT Omics Center, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan; United Graduate School of Child Development, Osaka University, Suita 565-0871, Japan; Global Center for Medical Engineering and Informatics, Osaka University, Suita, 565-0871, Japan; Addiction Research Unit, Osaka Psychiatric Research Center, Osaka Psychiatric Medical Center, Osaka 541-8567, Japan; Research Center for Child Mental Development, University of Fukui, Fukui 910-1193, Japan.
| | - Miyuki Doi
- Department of Neuroscience and Cell Biology, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan; Addiction Research Unit, Osaka Psychiatric Research Center, Osaka Psychiatric Medical Center, Osaka 541-8567, Japan
| | - Shoichi Shimada
- Department of Neuroscience and Cell Biology, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan; United Graduate School of Child Development, Osaka University, Suita 565-0871, Japan; Global Center for Medical Engineering and Informatics, Osaka University, Suita, 565-0871, Japan; Addiction Research Unit, Osaka Psychiatric Research Center, Osaka Psychiatric Medical Center, Osaka 541-8567, Japan
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3
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de Kort AR, Joosten EA, Patijn J, Tibboel D, van den Hoogen NJ. Selective Targeting of Serotonin 5-HT1a and 5-HT3 Receptors Attenuates Acute and Long-Term Hypersensitivity Associated With Neonatal Procedural Pain. FRONTIERS IN PAIN RESEARCH 2022; 3:872587. [PMID: 35571143 PMCID: PMC9091564 DOI: 10.3389/fpain.2022.872587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 03/30/2022] [Indexed: 11/13/2022] Open
Abstract
Neonatal painful procedures causes acute pain and trigger long-term changes in nociceptive processing and anxiety behavior, highlighting the need for adequate analgesia during this critical time. Spinal serotonergic receptors 5-HT1a and 5-HT3 play an important role in modulating incoming nociceptive signals in neonates. The current study aims to attenuate acute and long-term hypersensitivity associated with neonatal procedural pain using ondansetron (a 5-HT3 antagonist) and buspirone (a 5-HT1a agonist) in a well-established rat model of repetitive needle pricking. Sprague-Dawley rat pups of both sexes received ondansetron (3 mg/kg), buspirone (3 mg/kg) or saline prior to repetitive needle pricks into the left hind-paw from postnatal day 0-7. Control animals received tactile stimulation or were left undisturbed. Acute, long-term, and post-operative mechanical sensitivity as well as adult anxiety were assessed. Neonatal 5-HT1a receptor agonism completely reverses acute hypersensitivity from P0-7. The increased duration of postoperative hypersensitivity after re-injury in adulthood is abolished by 5-HT3 receptor antagonism during neonatal repetitive needle pricking, without affecting baseline sensitivity. Moreover, 5-HT1a and 5-HT3 receptor modulation decreases adult state anxiety. Altogether, our data suggests that targeted pharmacological treatment based on the modulation of spinal serotonergic network via the 5-HT1a and 5-HT3 receptors in neonates may be of use in treatment of neonatal procedural pain and its long-term consequences. This may result in a new mechanism-based therapeutic venue in treatment of procedural pain in human neonates.
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Affiliation(s)
- Anne R. de Kort
- Department of Anesthesiology and Pain Management, Maastricht University Medical Centre+, Maastricht, Netherlands
- Department of Translational Neuroscience, School of Mental Health and Neuroscience, Maastricht University, Maastricht, Netherlands
| | - Elbert A. Joosten
- Department of Anesthesiology and Pain Management, Maastricht University Medical Centre+, Maastricht, Netherlands
- Department of Translational Neuroscience, School of Mental Health and Neuroscience, Maastricht University, Maastricht, Netherlands
| | - Jacob Patijn
- Department of Anesthesiology and Pain Management, Maastricht University Medical Centre+, Maastricht, Netherlands
- Department of Translational Neuroscience, School of Mental Health and Neuroscience, Maastricht University, Maastricht, Netherlands
| | - Dick Tibboel
- Intensive Care and Department of Pediatric Surgery, Erasmus MC-Sophia Children's Hospital, Rotterdam, Netherlands
| | - Nynke J. van den Hoogen
- Department of Anesthesiology and Pain Management, Maastricht University Medical Centre+, Maastricht, Netherlands
- Department of Translational Neuroscience, School of Mental Health and Neuroscience, Maastricht University, Maastricht, Netherlands
- Department of Comparative Biology and Experimental Medicine, Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
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4
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de Abreu MS, Giacomini ACVV, Genario R, Demin KA, Amstislavskaya TG, Costa F, Rosemberg DB, Sneddon LU, Strekalova T, Soares MC, Kalueff AV. Understanding early-life pain and its effects on adult human and animal emotionality: Translational lessons from rodent and zebrafish models. Neurosci Lett 2022; 768:136382. [PMID: 34861343 DOI: 10.1016/j.neulet.2021.136382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 11/26/2021] [Accepted: 11/29/2021] [Indexed: 10/19/2022]
Abstract
Critical for organismal survival, pain evokes strong physiological and behavioral responses in various sentient species. Clinical and preclinical (animal) studies markedly increase our understanding of biological consequences of developmental (early-life) adversity, as well as acute and chronic pain. However, the long-term effects of early-life pain exposure on human and animal emotional responses remain poorly understood. Here, we discuss experimental models of nociception in rodents and zebrafish, and summarize mounting evidence of the role of early-life pain in shaping emotional traits later in life. We also call for further development of animal models to probe the impact of early-life pain exposure on behavioral traits, brain disorders and novel therapeutic treatments.
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Affiliation(s)
- Murilo S de Abreu
- Bioscreening Platform, School of Pharmacy, Southwest University, Chongqing, China; Bioscience Institute, University of Passo Fundo, Passo Fundo, RS, Brazil; Laboratory of Cell and Molecular Biology and Neurobiology, Moscow Institute of Physics and Technology, Moscow, Russia; The International Zebrafish Neuroscience Research Consortium (ZNRC), Slidell, LA, USA.
| | - Ana C V V Giacomini
- Bioscience Institute, University of Passo Fundo, Passo Fundo, RS, Brazil; Postgraduate Program in Environmental Sciences, University of Passo Fundo, Passo Fundo, RS, Brazil
| | - Rafael Genario
- Bioscience Institute, University of Passo Fundo, Passo Fundo, RS, Brazil
| | - Konstantin A Demin
- Institute of Experimental Medicine, Almazov National Medcial Research Center, Ministry of Healthcare of Russian Federation, St. Petersburg, Russia; Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, Russia; Granov Russian Scientific Research Center of Radiology and Surgical Technologies, Ministry of Healthcare of Russian Federation, St. Petersburg, Russia
| | - Tamara G Amstislavskaya
- Scientific Research Institute of Neuroscience and Medicine, Novosibirsk, Russia; Novosibirsk State University, Novosibirsk, Russia; The International Zebrafish Neuroscience Research Consortium (ZNRC), Slidell, LA, USA
| | - Fabiano Costa
- Department of Biochemistry and Molecular Biology, Natural and Exact Sciences Center, Federal University of Santa Maria, Brazil; Neurobiology Program, Sirius University of Science and Technology, Sochi, Russia
| | - Denis B Rosemberg
- Department of Biochemistry and Molecular Biology, Natural and Exact Sciences Center, Federal University of Santa Maria, Brazil; The International Zebrafish Neuroscience Research Consortium (ZNRC), Slidell, LA, USA
| | - Lynne U Sneddon
- University of Gothenburg, Department of Biological and Environmental Sciences, Gothenburg, Sweden
| | - Tatyana Strekalova
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience, Maastricht University, Maastricht, Netherlands; Laboratory of Psychiatric Neurobiology, Institute of Molecular Medicine and Department of Normal Physiology, Sechenov 1st Moscow State Medical University, Moscow, Russia; Institute of General Pathology and Pathophysiology, Moscow, Russia; Department of Preventive Medicine, Maastricht Medical Center Annadal, Maastricht, Netherlands
| | - Marta C Soares
- CIBIO, Research Centre in Biodiversity and Genetic Resources, University of Porto, Campus Agrário de Vairão, Vairão, Portugal
| | - Allan V Kalueff
- School of Pharmacy, Southwest University, Chongqing, China; Ural Federal University, Ekaterinburg, Russia; Neurobiology Program, Sirius University of Science and Technology, Sochi, Russia.
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5
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Adcock SJJ. Early Life Painful Procedures: Long-Term Consequences and Implications for Farm Animal Welfare. FRONTIERS IN ANIMAL SCIENCE 2021. [DOI: 10.3389/fanim.2021.759522] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Farm animals routinely undergo painful husbandry procedures early in life, including disbudding and castration in calves and goat kids, tail docking and castration in piglets and lambs, and beak trimming in chicks. In rodents, inflammatory events soon after birth, when physiological systems are developing and sensitive to perturbation, can profoundly alter phenotypic outcomes later in life. This review summarizes the current state of research on long-term phenotypic consequences of neonatal painful procedures in rodents and farm animals, and discusses the implications for farm animal welfare. Rodents exposed to early life inflammation show a hypo-/hyper-responsive profile to pain-, fear-, and anxiety-inducing stimuli, manifesting as an initial attenuation in responses that transitions into hyperresponsivity with increasing age or cumulative stress. Neonatal inflammation also predisposes rodents to cognitive, social, and reproductive deficits, and there is some evidence that adverse effects may be passed to offspring. The outcomes of neonatal inflammation are modulated by injury etiology, age at the time of injury and time of testing, sex, pain management, and rearing environment. Equivalent research examining long-term phenotypic consequences of early life painful procedures in farm animals is greatly lacking, despite obvious implications for welfare and performance. Improved understanding of how these procedures shape phenotypes will inform efforts to mitigate negative outcomes through reduction, replacement, and refinement of current practices.
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6
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Timmerman BM, Mooney-Leber SM, Brummelte S. The effects of neonatal procedural pain and maternal isolation on hippocampal cell proliferation and reelin concentration in neonatal and adult male and female rats. Dev Psychobiol 2021; 63:e22212. [PMID: 34813104 DOI: 10.1002/dev.22212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 10/04/2021] [Accepted: 10/13/2021] [Indexed: 11/11/2022]
Abstract
Preterm births accounted for over 10% of all U.S. live births in 2019 and the rate is rising. Neonatal stressors, especially procedural pain, experienced by preterm infants in the neonatal intensive care unit (NICU) have been associated with neurodevelopmental impairments. Parental care can alleviate stress during stressful or painful procedures; however, infants in the NICU often receive reduced parental care compared with their peers. Animal studies suggest that decreased maternal care similarly impairs neurodevelopment but also influences the effects of neonatal pain. It is important to mimic both stressors in animal models of neonatal stress exposure. In this study, researchers investigated the individual and combined impact of neonatal pain and maternal isolation on reelin protein levels and cellular proliferation in the hippocampal dentate gyrus of 8 days old and adult rats. Exposure to either stressor individually, but not both, increased reelin levels in the dentate gyrus of adult females without significantly altering reelin levels in adult males. However, cell proliferation levels at either age were unaffected by the early-life stressors. These results suggest that each early-life stressor has a unique effect on markers of brain development and more research is needed to further investigate their distinct influences.
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Affiliation(s)
- Brian M Timmerman
- Department of Psychology, Wayne State University, Detroit, Michigan, USA
| | - Sean M Mooney-Leber
- Department of Psychology, University of Wisconsin-Stevens Points, Stevens Point, Wisconsin, USA
| | - Susanne Brummelte
- Department of Psychology, Wayne State University, Detroit, Michigan, USA.,Translational Neuroscience Program, Wayne State University, Detroit, Michigan, USA
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7
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de Kort AR, Joosten EA, Patijn J, Tibboel D, van den Hoogen NJ. Neonatal procedural pain affects state, but not trait anxiety behavior in adult rats. Dev Psychobiol 2021; 63:e22210. [PMID: 34813103 PMCID: PMC9298691 DOI: 10.1002/dev.22210] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 10/04/2021] [Accepted: 10/19/2021] [Indexed: 01/07/2023]
Abstract
The influence of neonatal experiences upon later-life affective behavior is increasingly recognized, but the reported effects on anxiety are often contradictory. The observed effect may depend upon the type of anxiety (state or trait) affected. The current study aims to investigate whether neonatal repetitive needle pricking alters anxiety behavior in adulthood, by assessing both state and trait anxiety in rats. Sprague-Dawley rat pups received four unilateral needle pricks per day, while controls received four tactile stimuli or were left completely undisturbed during the first postnatal week. Mechanical sensitivity was assessed in the neonatal phase and throughout the development. State anxiety was assessed in the open field test and trait anxiety in the elevated zero maze. The results show that repetitive needle pricking leads to acute mechanical hypersensitivity, but does not affect baseline mechanical sensitivity throughout development. In adulthood, animals previously exposed to neonatal procedural pain (including repetitive handling and removal from litter) showed lower state anxiety but did not differ in trait anxiety, as compared with the undisturbed controls. These findings indicate that early-life procedural pain decreases state but not trait anxiety behavior in later life in a rodent model of repetitive needle pricking.
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Affiliation(s)
- Anne R de Kort
- Department of Anesthesiology and Pain Management, Maastricht University Medical Centre, Maastricht, The Netherlands.,Department of Translational Neuroscience, School of Mental Health and Neuroscience, Maastricht University, Maastricht, The Netherlands
| | - Elbert A Joosten
- Department of Anesthesiology and Pain Management, Maastricht University Medical Centre, Maastricht, The Netherlands.,Department of Translational Neuroscience, School of Mental Health and Neuroscience, Maastricht University, Maastricht, The Netherlands
| | - Jacob Patijn
- Department of Anesthesiology and Pain Management, Maastricht University Medical Centre, Maastricht, The Netherlands.,Department of Translational Neuroscience, School of Mental Health and Neuroscience, Maastricht University, Maastricht, The Netherlands
| | - Dick Tibboel
- Intensive Care and Department of Pediatric Surgery, Erasmus MC-Sophia Children's Hospital, Rotterdam, The Netherlands
| | - Nynke J van den Hoogen
- Department of Anesthesiology and Pain Management, Maastricht University Medical Centre, Maastricht, The Netherlands.,Department of Translational Neuroscience, School of Mental Health and Neuroscience, Maastricht University, Maastricht, The Netherlands.,Department of Comparative Biology and Experimental Medicine, Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
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8
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Li Y, Wei D, Zhang M, Yue T, Du H, Liu Q, Gan S, Liu H, Dong Y, Qiao X, Zhang Y, Yang L. Xiaoyao Pill improves the Affective Dysregulation of Sleep-deprived Female Mice by inhibiting Brain Injury and regulating the Content of Monoamine Neurotransmitter. Curr Pharm Biotechnol 2021; 23:1080-1093. [PMID: 34636307 DOI: 10.2174/1389201022666211012102501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 06/13/2021] [Accepted: 08/06/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Sleep curtailment is a serious problem in many societies. Clinical evidence has shown that sleep deprivation is associated with mood dysregulation, formation of false memory, cardio-metabolic risk factors and outcomes, inflammatory disease risk, and all-cause mortality. The affective disorder dysregulation caused by insufficient sleep has become an increasingly serious health problem. However, to date, not much attention has been paid to the mild affective dysregulation caused by insufficient sleep, and there is no clear and standard therapeutic method to treat it. The Xiaoyao Pill is a classic Chinese medicinal formula, with the effect of dispersing stagnated hepatoqi, invigorating the spleen, and nourishing the blood. Therefore, it is most commonly used to treat gynecological diseases in China. In the present study, the effects of the Xiaoyao Pill on affective dysregulation of sleep-deprived mice and its underlying molecular mechanisms were investigated. METHODS Forty adult female mice were used in the present study. The sleep deprivation model was established by improving the multi-platform water environment method. After 7 consecutive days of sleep deprivation, the mice were administrated low (LXYP, 0.32mg/kg) and high (HXYP, 0.64 mg/kg) doses of the Xiaoyao Pill for two weeks. Then, the body weight, behavioral deficits, and histopathology were evaluated. Meanwhile, the expression of c-fos protein and the concentrations of monoamine neurotransmitters in the hippocampus and prefrontal cortex were determined after two weeks of treatment. RESULTS Xiaoyao Pill treatment significantly increased body weight and sucrose consumption and decreased the irritability scores of the sleep-deprived mice. Meanwhile, Xiaoyao Pill treatment prevented brain injury and inhibited the expression of c-fos protein in the hippocampus and prefrontal cortex. In addition, HXYP treatment significantly upregulated the levels of NE in the hippocampus and prefrontal cortex (p < 0.01). LXYP treatment significantly up-regulated the levels of 5-HT in the prefrontal cortex. Meanwhile, both HXYP and LXYP treatment significantly up-regulated the levels of DA in the prefrontal cortex (p < 0.05 or p < 0.01) of sleep-deprived mice. CONCLUSIONS The present study demonstrates that Xiaoyao Pill treatment prevented the behavioral deficits of mice induced by sleep deprivation by promoting the recovery of brain tissue injury and up-regulating the levels of NE, 5-HT, and DA in the brain tissue.
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Affiliation(s)
- Yujie Li
- Pharmacology Laboratory, School of Basic Medical Medicine, 2College of First Clinical Medical, Henan University of Chinese Medicine, Zhengzhou, Henan 450046. China
| | - Dandan Wei
- Department of Materials Science and Engineering, College of Shuren, South University of Science and Technology, Shenzhen, Guangdong 518055. China
| | - Minghao Zhang
- Pharmacology Laboratory, School of Basic Medical Medicine, 2College of First Clinical Medical, Henan University of Chinese Medicine, Zhengzhou, Henan 450046. China
| | - Tiantian Yue
- Pharmacology Laboratory, School of Basic Medical Medicine, 2College of First Clinical Medical, Henan University of Chinese Medicine, Zhengzhou, Henan 450046. China
| | - Huimin Du
- Department of Materials Science and Engineering, College of Shuren, South University of Science and Technology, Shenzhen, Guangdong 518055. China
| | - Qi Liu
- Department of Materials Science and Engineering, College of Shuren, South University of Science and Technology, Shenzhen, Guangdong 518055. China
| | - Shihu Gan
- Department of Materials Science and Engineering, College of Shuren, South University of Science and Technology, Shenzhen, Guangdong 518055. China
| | - Hanbin Liu
- Department of Materials Science and Engineering, College of Shuren, South University of Science and Technology, Shenzhen, Guangdong 518055. China
| | - Yijie Dong
- Department of Materials Science and Engineering, College of Shuren, South University of Science and Technology, Shenzhen, Guangdong 518055. China
| | - Xinyue Qiao
- Department of Materials Science and Engineering, College of Shuren, South University of Science and Technology, Shenzhen, Guangdong 518055. China
| | - Yichi Zhang
- Department of Materials Science and Engineering, College of Shuren, South University of Science and Technology, Shenzhen, Guangdong 518055. China
| | - Liping Yang
- Pharmacology Laboratory, School of Basic Medical Medicine, 2College of First Clinical Medical, Henan University of Chinese Medicine, Zhengzhou, Henan 450046. China
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9
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Davis SM, Burman MA. Maternal separation with neonatal pain influences later-life fear conditioning and somatosenation in male and female rats. Stress 2021; 24:504-513. [PMID: 33043804 PMCID: PMC8039057 DOI: 10.1080/10253890.2020.1825674] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Early life adversity, including that which occurs in a medical setting, has been increasingly shown to have lasting consequences on both physical and mental health. In order to understand the lasting effects of early-life adversity, such as that might occur in the neonatal intensive care unit (NICU), several rodent models have been developed including maternal separation, neonatal handling, and repeated needle prick pain. However, in the clinical scenario, these stressors are often combined. Thus, the current study seeks to observe the lasting impacts of both neonatal pain and maternal separation in a rodent model. Rats were separated from their dam for 6 h per day during the first 7 days of life, during which they were subjected to repeated needle prick pain or handling. A separate group was left undisturbed. All rats were subsequently tested for threat processing using a 3-day Pavlovian fear conditioning model and for somatosensation using measures of mechanical and thermal thresholds. Results indicated that rats subjected to maternal separation and pain had enhanced fear conditioning in adolescence as well as displaying a modest age-independent tactile hypersensitivity compared to undisturbed controls. These data show that experiencing combined neonatal pain and maternal separation may create a latent vulnerability to subsequent stressors.
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Affiliation(s)
- Seth M. Davis
- Department of Psychology, University of New England
- Center for Excellence in the Neurosciences, University of
New England
| | - Michael A. Burman
- Department of Psychology, University of New England
- Center for Excellence in the Neurosciences, University of
New England
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10
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Davis SM, Zuke JT, Berchulski MR, Burman MA. Amygdalar Corticotropin-Releasing Factor Signaling Is Required for Later-Life Behavioral Dysfunction Following Neonatal Pain. Front Physiol 2021; 12:660792. [PMID: 34045975 PMCID: PMC8144524 DOI: 10.3389/fphys.2021.660792] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 03/31/2021] [Indexed: 11/13/2022] Open
Abstract
Neonatal pain such as that experienced by infants in the neonatal intensive care unit is known to produce later-life dysfunction including heightened pain sensitivity and anxiety, although the mechanisms remain unclear. Both chronic pain and stress in adult organisms are known to influence the corticotropin-releasing factor (CRF) system in the Central Nucleus of the Amygdala, making this system a likely candidate for changes following neonatal trauma. To examine this, neonatal rats were subjected to daily pain, non-painful handling or left undisturbed for the first week of life. Beginning on postnatal day, 24 male and female rats were subjected to a 4-day fear conditioning and sensory testing protocol. Some subjects received intra-amygdalar administration of either Vehicle, the CRF receptor 1 (CRF1) receptor antagonist Antalarmin, or the CRF receptor 2 (CRF2) receptor antagonist Astressin 2B prior to fear conditioning and somatosensory testing, while others had tissue collected following fear conditioning and CRF expression in the CeA and BLA was assessed using fluorescent in situ hybridization. CRF1 antagonism attenuated fear-induced hypersensitivity in neonatal pain and handled rats, while CRF2 antagonism produced a general antinociception. In addition, neonatal pain and handling produced a lateralized sex-dependent decrease in CRF expression, with males showing a diminished number of CRF-expressing cells in the right CeA and females showing a similar reduction in the number of CRF-expressing cells in the left BLA compared to undisturbed controls. These data show that the amygdalar CRF system is a likely target for alleviating dysfunction produced by early life trauma and that this system continues to play a major role in the lasting effects of such trauma into the juvenile stage of development.
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Affiliation(s)
- Seth M Davis
- Department of Psychology, University of New England, Biddeford, ME, United States.,Center for Excellence in the Neurosciences, University of New England, Biddeford, ME, United States
| | - Jared T Zuke
- Department of Psychology, University of New England, Biddeford, ME, United States.,Center for Excellence in the Neurosciences, University of New England, Biddeford, ME, United States
| | - Mariah R Berchulski
- Department of Psychology, University of New England, Biddeford, ME, United States.,Center for Excellence in the Neurosciences, University of New England, Biddeford, ME, United States
| | - Michael A Burman
- Department of Psychology, University of New England, Biddeford, ME, United States.,Center for Excellence in the Neurosciences, University of New England, Biddeford, ME, United States
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11
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Xia D, Min C, Chen Y, Ling R, Chen M, Li X. Repetitive Pain in Neonatal Male Rats Impairs Hippocampus-Dependent Fear Memory Later in Life. Front Neurosci 2020; 14:722. [PMID: 32733201 PMCID: PMC7360690 DOI: 10.3389/fnins.2020.00722] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 06/17/2020] [Indexed: 11/13/2022] Open
Abstract
Preterm infants in neonatal intensive care units are inevitably subjected to numerous painful procedures. However, little is known about the consequences of early pain experience on fear memory formation later in life. We hypothesized that exposure to repetitive pain in early life triggered hippocampal synaptic plasticity and resulted in memory deficiency in prepubertal and adult rats. From the day of birth (P0) to postnatal day 7 (P7), neonatal male rat pups were randomly assigned to either needle pricks or tactile touches repetitively every 6 h. Trace fear conditioning was performed on rats on P24-P26 and P87-P89. On P24 and P87, rats were sacrificed for molecular and electrophysiological studies. On P24-26 and P87-89, rats that experienced neonatal needle treatment showed a significant reduction in freezing time in the contextual fear conditioning (P < 0.05) and trace fear conditioning tests (P < 0.05). Moreover, repetitive neonatal procedural pain caused a significant decrease in the magnitude of hippocampal long-term potentiation induced by high-frequency stimulation. Furthermore, rats that experienced neonatal needle treatment demonstrated sustained downregulation of NR1, NR2A, NR2B, and GluR1 expression in the hippocampus. Therefore, neonatal pain is related to deficits in hippocampus-related fear memory later in life and might be caused by impairments in hippocampal synaptic plasticity.
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Affiliation(s)
- Dongqing Xia
- Department of Child Health Care, Children's Hospital of Nanjing Medical University, Nanjing, China
| | - Cuiting Min
- Department of Child Health Care, Children's Hospital of Nanjing Medical University, Nanjing, China
| | - Yinhua Chen
- Department of Child Health Care, Children's Hospital of Nanjing Medical University, Nanjing, China
| | - Ru Ling
- Department of Child Health Care, Children's Hospital of Nanjing Medical University, Nanjing, China
| | - Mengying Chen
- Department of Child Health Care, Children's Hospital of Nanjing Medical University, Nanjing, China
| | - Xiaonan Li
- Department of Child Health Care, Children's Hospital of Nanjing Medical University, Nanjing, China
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