1
|
Malheiros J, Amaral C, da Silva LS, Guinsburg R, Covolan L. Neonatal nociceptive stimulation results in pain sensitization, reduction of hippocampal 5-HT 1A receptor, and p-CREB expression in adult female rats. Behav Brain Res 2024; 466:114975. [PMID: 38552745 DOI: 10.1016/j.bbr.2024.114975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 03/22/2024] [Accepted: 03/26/2024] [Indexed: 04/13/2024]
Abstract
Painful invasive procedures are often performed on newborns admitted to intensive care units (ICU). The acute and long-term effects caused by these stimuli can be investigated in animal models, such as newborn rats. Previous studies have shown that animals subjected to nociceptive stimuli in the neonatal period show sex-specific behavioral changes such as signs of anxiety or depression. Under the same conditions, neonatal stimuli also provoke an increase in the rate of neurogenesis and cell activation in the hippocampal dentate gyrus. So, this study aims to identify the possible roles of central monoamines, receptor expression (5-HT1A), and signaling factors (p-CREB) underlying the long-term effects of neonatal nociceptive stimulation. For this, noxious stimulation was induced by intra-plantar injection of Complete Freund´s adjuvant (CFA) on the postnatal day 1 (P1) or 8 (P8). Control animals were not stimulated. On P75 the behavioral tests were conducted (hotplate and elevated plus maze), followed by sacrifice and molecular studies. Our results showed that neonatal nociceptive stimulation alters pain sensitization specially in females, while stimulation on P1 increases pain threshold, P8-stimulated animals respond with reduced pain threshold (P < 0.001). Hippocampal expression of 5-HT1A receptor and p-CREB were reduced in P8 F group (P < 0.001) in opposition to the increased utilization rate of dopamine and serotonin in this group (P < 0.05). This study shows sex- and age-specific responses of signaling pathways within the hippocampus accompanied by altered behavioral repertoire, at long-term after neonatal painful stimulation.
Collapse
Affiliation(s)
- Jackeline Malheiros
- Departamento de Fisiologia, Universidade Federal de São Paulo, São Paulo, SP 04023-062, Brazil
| | - Cristiane Amaral
- Departamento de Fisiologia, Universidade Federal de São Paulo, São Paulo, SP 04023-062, Brazil
| | - Luiz Severino da Silva
- Departamento de Micro Imuno Parasitologia, Universidade Federal de São Paulo, São Paulo, SP 04023-062, Brazil
| | - Ruth Guinsburg
- Disciplina de Pediatria Neonatal, Departamento de Pediatria, Universidade Federal de São Paulo, São Paulo, SP 04023-062, Brazil
| | - Luciene Covolan
- Departamento de Fisiologia, Universidade Federal de São Paulo, São Paulo, SP 04023-062, Brazil.
| |
Collapse
|
2
|
Barr GA, Opendak M, Perry RE, Sarro E, Sullivan RM. Infant pain vs. pain with parental suppression: Immediate and enduring impact on brain, pain and affect. PLoS One 2023; 18:e0290871. [PMID: 37972112 PMCID: PMC10653509 DOI: 10.1371/journal.pone.0290871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 08/18/2023] [Indexed: 11/19/2023] Open
Abstract
BACKGROUND In the short term, parental presence while a human infant is in pain buffers the immediate pain responses, although emerging evidence suggests repeated social buffering of pain may have untoward long-term effects. METHODS/FINDING To explore the short- and long-term impacts of social buffering of pain, we first measured the infant rat pup's [postnatal day (PN) 8, or 12] response to mild tail shock with the mother present compared to shock alone or no shock. Shock with the mother reduced pain-related behavioral activation and USVs of pups at both ages and reduced Fos expression in the periaqueductal gray, hypothalamic paraventricular nucleus, and the amygdala at PN12 only. At PN12, shock with the mother compared to shock alone differentially regulated expression of several hundred genes related to G-protein-coupled receptors (GPCRs) and neural development, whereas PN8 pups showed a less robust and less coherent expression pattern. In a second set of experiments, pups were exposed to daily repeated Shock-mother pairings (or controls) at PN5-9 or PN10-14 (during and after pain sensitive period, respectively) and long-term outcome assessed in adults. Shock+mother pairing at PN5-9 reduced adult carrageenan-induced thermal hyperalgesia and reduced Fos expression, but PN10-14 pairings had minimal impact. The effect of infant treatment on adult affective behavior showed a complex treatment by age dependent effect. Adult social behavior was decreased following Shock+mother pairings at both PN5-9 and PN10-14, whereas shock alone had no effect. Adult fear responses to a predator odor were decreased only by PN10-14 treatment and the infant Shock alone and Shock+mother did not differ. CONCLUSIONS/SIGNIFICANCE Overall, integrating these results into our understanding of long-term programming by repeated infant pain experiences, the data suggest that pain experienced within a social context impacts infant neurobehavioral responses and initiates an altered developmental trajectory of pain and affect processing that diverges from experiencing pain alone.
Collapse
Affiliation(s)
- Gordon A. Barr
- Department of Anesthesiology and Critical Care Medicine, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, United States of America
- Perelman School of Medicine at the University of Pennsylvania, Department of Psychology, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Maya Opendak
- Child Study Center, Center for Early Childhood Health & Development, Child & Adolescent Psychiatry, New York University School of Medicine, New York, New York, United States of America
- Emotional Brain Institute, Nathan Kline Institute, Orangeburg, New York, United States of America
| | - Rosemarie E. Perry
- Child Study Center, Center for Early Childhood Health & Development, Child & Adolescent Psychiatry, New York University School of Medicine, New York, New York, United States of America
- Emotional Brain Institute, Nathan Kline Institute, Orangeburg, New York, United States of America
| | - Emma Sarro
- Child Study Center, Center for Early Childhood Health & Development, Child & Adolescent Psychiatry, New York University School of Medicine, New York, New York, United States of America
- Emotional Brain Institute, Nathan Kline Institute, Orangeburg, New York, United States of America
| | - Regina M. Sullivan
- Child Study Center, Center for Early Childhood Health & Development, Child & Adolescent Psychiatry, New York University School of Medicine, New York, New York, United States of America
- Emotional Brain Institute, Nathan Kline Institute, Orangeburg, New York, United States of America
| |
Collapse
|
3
|
Li X, Li Q, Xu L, Ma Z, Shi Y, Zhang X, Yang Y, Wang J, Fan L, Wu L. Involvement of Kir4.1 in pain insensitivity of the BTBR mouse model of autism spectrum disorder. Biochim Biophys Acta Mol Basis Dis 2023; 1869:166700. [PMID: 36990129 DOI: 10.1016/j.bbadis.2023.166700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 03/19/2023] [Accepted: 03/21/2023] [Indexed: 03/30/2023]
Abstract
Autism spectrum disorder (ASD) is a severe neurodevelopmental disorder. Abnormal pain sensation is a common clinical symptom of ASD that seriously affects the quality of life of patients with ASD and their families. However, the underlying mechanism is unclear. It is believed to be related to the excitability of neurons and the expression of ion channels. Herein, we confirmed that baseline pain and Complete Freund's adjuvant (CFA)-induced chronic inflammatory pain were impaired in the BTBR T+ Itpr3tf/J (BTBR) mouse model of ASD. RNA sequencing (RNA-seq) analyses of the dorsal root ganglia (DRG), which are closely related to pain in ASD model mice, revealed that high expression of KCNJ10 (encoding Kir4.1) might be an important factor in ASD pain sensation abnormalities. The levels of Kir4.1 were further verified by western blotting, RT-qPCR, and immunofluorescence. By inhibiting Kir4.1, the pain insensitivity of BTBR mice improved, confirming that a high expression level of Kir4.1 was highly correlated with decreased pain sensitivity in ASD. Meanwhile, we found that the anxiety behaviours and the social novelty recognition were changed after CFA induced inflammatory pain. And after inhibiting Kir4.1, the stereotyped behaviours and social novelty recognition of BTBR mice were also improved. Further, we found that the expression levels of glutamate transporters, excitatory amino acid transporter 1 (EAAT1), and excitatory amino acid transporter 2 (EAAT2) were increased in the DRG of BTBR mice but decreased after inhibiting Kir4.1. This suggests that Kir4.1 may play a key role in the improvement of pain insensitivity in ASD by regulating glutamate transporters. In conclusion, our findings revealed the possible mechanism and role of Kir4.1 in the pain insensitivity in ASD, using bioinformatics analyses and animal experiments, and provided a theoretical basis for clinically targeted intervention in ASD.
Collapse
Affiliation(s)
- Xiang Li
- Department of Children's and Adolescent Health, Public Health College, Harbin Medical University, Harbin, China
| | - Qi Li
- Department of Children's and Adolescent Health, Public Health College, Harbin Medical University, Harbin, China
| | - Lisha Xu
- Department of Children's and Adolescent Health, Public Health College, Harbin Medical University, Harbin, China
| | - Zhe Ma
- Department of Children's and Adolescent Health, Public Health College, Harbin Medical University, Harbin, China
| | - Yaxin Shi
- Department of Children's and Adolescent Health, Public Health College, Harbin Medical University, Harbin, China
| | - Xirui Zhang
- Department of Children's and Adolescent Health, Public Health College, Harbin Medical University, Harbin, China
| | - Yuan Yang
- Department of Children's and Adolescent Health, Public Health College, Harbin Medical University, Harbin, China
| | - Jia Wang
- Department of Children's and Adolescent Health, Public Health College, Harbin Medical University, Harbin, China
| | - Lili Fan
- Department of Children's and Adolescent Health, Public Health College, Harbin Medical University, Harbin, China.
| | - Lijie Wu
- Department of Children's and Adolescent Health, Public Health College, Harbin Medical University, Harbin, China.
| |
Collapse
|
4
|
Rêgo DDSB, Silva CS, Mello LEAM, Leslie ATFS. Early life nociceptive stimulus and fentanyl exposure increase hippocampal neurogenesis and anxiety but do not affect spatial learning and memory. Front Neurosci 2022; 16:988096. [PMID: 36248634 PMCID: PMC9557065 DOI: 10.3389/fnins.2022.988096] [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: 07/07/2022] [Accepted: 09/07/2022] [Indexed: 11/15/2022] Open
Abstract
This study aimed to determine whether preemptive fentanyl administration in neonatal rats reduces the impact of a nociceptive stimulus initiated during the first day of life (P1) on hippocampal neurogenesis, behavior, and learning. At P1, Wistar rat pups received either a subcutaneous injection of fentanyl (F) before intraplantar injection of complete Freund’s adjuvant (CFA) (CFA + F group), an isolated injection of CFA (CFA group), or subcutaneous injection of fentanyl without CFA injection (F). Control animals received saline injections using the same route and volume as the treatment groups. Hippocampal neurogenesis was evaluated by 5′ –bromo-2′-deoxyuridine (BrdU) staining on P10 and P39 to assess neuronal proliferation and survival, respectively. Anxiety behavior in adulthood was assessed using an open field test (OF) and an elevated plus maze test (EPM). Spatial memory was assessed on a Morris water maze test (MWM), where the animals were trained for seven days, beginning on P81, and the probe trial was performed to evaluate memory retention. Although the CFA + F group showed an increased number of proliferative cells on P10, this finding did not persist on P39. The CFA + F group spent more time in the closed arms in the EPM, revealing more anxious behavior, although the early noxious experience, both with and without fentanyl, did not alter neurogenesis in adolescence and learning in adulthood. This study highlights that the impact of pain in early life pain combined with fentanyl on hippocampal neurogenesis on P10 did not persist on P39. In addition, this combined intervention during the first week of life was associated with higher anxiety levels.
Collapse
Affiliation(s)
| | - Clivandir S. Silva
- Laboratório de Neurobiologia, Departamento de Fisiologia, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Luiz Eugenio A. M. Mello
- Laboratório de Neurobiologia, Departamento de Fisiologia, Universidade Federal de São Paulo, São Paulo, Brazil
- Instituto D’Or de Pesquisa e Ensino, IDOr, São Paulo, Brazil
| | - Ana Teresa Figueiredo Stochero Leslie
- Laboratório de Neurobiologia, Departamento de Fisiologia, Universidade Federal de São Paulo, São Paulo, Brazil
- Departmento de Pediatria, Universidade Federal de São Paulo, São Paulo, Brazil
- *Correspondence: Ana Teresa Figueiredo Stochero Leslie,
| |
Collapse
|
5
|
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.
Collapse
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
| |
Collapse
|
6
|
Nuseir KQ, Alzoubi KH, Alhusban AY, Alazzani M, Bawaane A, Khabour OF. Saccharin and naltrexone prevent increased pain sensitivity and impaired long-term memory induced by repetitive neonatal noxious stimulation: role of BDNF and enkephalin. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2021; 394:1641-1650. [PMID: 33829293 DOI: 10.1007/s00210-021-02086-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Accepted: 04/04/2021] [Indexed: 11/29/2022]
Abstract
This study aim to examine the hypothesis that repetitive painful stimuli during infancy will alter pain sensitivity and impair learning and memory during adulthood and that saccharin will prevent this through its analgesic effect. Naltrexone is used to examine if saccharin effect is mediated via the endogenous opioid system. Pain in rat pups was induced via needle pricks of the paws on day 1 of their birth (P0). All treatments/ manipulations started on day 1 and continued for 2 weeks. The radial arm water maze (RAWM) test was used to assess learning and memory. Pain threshold through foot-withdrawal response to a hot plate was also assessed. At the end of behavioral tests, animals were killed, hippocampus was dissected, and hippocampal levels of β-endorphin, enkephalin, and brain-derived neurotropic factor (BDNF) were assessed using ELISA. Naltrexone and saccharin combined normalized noxious stimulation induced increased pain sensitivity later in life. Furthermore, naltrexone and saccharin together mitigated the deficiency in learning and memory induced by noxious stimulation. Saccharin treatment prevented reduction in hippocampal enkephalin. Additionally, saccharin prevented hippocampal noxious stimulation induced BDNF decrement. Saccharin prevented long-term memory impairment during adulthood induced by repeated neonatal pain via mechanisms that appear to involve BDNF. Interestingly, naltrexone did not antagonize the effects of saccharin, instead naltrexone augmented saccharin effects.
Collapse
Affiliation(s)
- Khawla Q Nuseir
- Department of Clinical Pharmacy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid, 22110, Jordan. .,School of Pharmacy and Pharmaceutical Sciences, University of California at Irvine, Irvine, CA, 92697, USA.
| | - Karem H Alzoubi
- Department of Clinical Pharmacy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid, 22110, Jordan
| | - Ahmed Y Alhusban
- Department of Clinical Pharmacy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid, 22110, Jordan
| | - Mohammed Alazzani
- Department of Clinical Pharmacy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid, 22110, Jordan
| | - Areej Bawaane
- Department of Clinical Pharmacy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid, 22110, Jordan
| | - Omar F Khabour
- Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, Jordan University of Science and Technology, Irbid, Jordan
| |
Collapse
|
7
|
Malheiros JM, Andreeta MB, Polli RS, Paiva FF, Tannús A, Guinsburg R, Covolan L. Adult brain activation in response to pain is changed by neonatal painful stimulation according to sex: A manganese-enhanced MRI study. Eur J Neurosci 2020; 53:571-587. [PMID: 32852090 DOI: 10.1111/ejn.14948] [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: 09/02/2019] [Revised: 07/27/2020] [Accepted: 08/13/2020] [Indexed: 11/30/2022]
Abstract
Although it is known that nociceptive stimulation in the first postnatal week in rats is useful to model preterm pain, resulting in activation of specific brain areas, as assessed in vivo using manganese-enhanced magnetic resonance imaging (MEMRI), little is known about its long-term effects and sex specificity. Here we aimed to investigate whether inflammatory pain induced in male and female adult rats modify the pattern of brain activation between animals subjected or not to neonatal pain. For this, Complete Freund's adjuvant (CFA) was injected into the left hind paw of rat pups on postnatal day 1 (P1) or P8 to induce inflammatory response. During adulthood, CFA-treated and control animals were injected with CFA 1 hr prior MRI. MEMRI has the ability to enhance the contrast of selective brain structures in response to a specific stimulus, as the pain. MEMRI responses were consistent with activation of nociceptive pathways and these responses were reduced in animals treated with CFA on P1, but increased in animals treated on P8, mainly in the female group. In agreement, P8 female group showed exacerbated responses in the thermal nociceptive test. Using MEMRI, we conclude that the natural ability of adult rats to recognize and react to pain exposition is modified by neonatal painful exposition, mainly among females.
Collapse
Affiliation(s)
| | - Mariane B Andreeta
- Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, Brazil
| | - Roberson S Polli
- Instituto de Ciência e Tecnologia, Universidade Federal de São Paulo, São José dos Campos, Brazil
| | - Fernando F Paiva
- Centro de Imagens e Espectroscopia in vivo por Ressonância Magnética (CIERMag), Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, Brazil
| | - Alberto Tannús
- Centro de Imagens e Espectroscopia in vivo por Ressonância Magnética (CIERMag), Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, Brazil
| | - Ruth Guinsburg
- Disciplina de Pediatria Neonatal, Departamento de Pediatria, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Luciene Covolan
- Departamento de Fisiologia, Universidade Federal de São Paulo, São Paulo, Brazil
| |
Collapse
|
8
|
Nuseir KQ, Altarifi AY, Tasslaq A, Alhusban AY, Alzoubi KH. Early and late anti nociceptive effects of sucrose on neonatal inflammatory pain in rats: Comparison to a non-steroidal anti-inflammatory drug. Physiol Behav 2019; 206:37-42. [PMID: 30917911 DOI: 10.1016/j.physbeh.2019.03.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 03/11/2019] [Accepted: 03/16/2019] [Indexed: 11/25/2022]
Abstract
Management of neonatal pain is not only ethical but is also essential. Barriers to pain management in infants include lack of safe and effective medications and fear of adverse effects of conventional pain medications. Sweet solutions given intraorally have been shown to reduce pain behaviors and associated symptoms. Sucrose and other sweet solutions are being increasingly used at the NICUs and immunization clinics. Sucrose for mild invasive procedures is effective and safe for those procedures that need to be repeated multiple times during the day. Only few studies examine the efficacy of sucrose for the management of inflammatory pain during infancy. In this study, Complete Freund's Adjuvant (CFA) was used to induce inflammation in 5-day-old rat pups; CFA also produces inflammation that lasts for more than a day, thus can also be a model for chronic pain. Sucrose or ibuprofen was given to subset of pups shortly after CFA intraplantar injections. Thermal as well as mechanical pain sensitivity was assessed on subsequent days as well as during adolescence and early adulthood. Sucrose and ibuprofen were both effective in preventing hyperalgesia and allodynia produced by CFA. Interestingly, sucrose was even more effective than ibuprofen, and the analgesic effects continued further to adolescence and adult life of the rats. Thus, and according to the results of this study, sucrose seems to be just as effective for inflammatory pain as Ibuprofen. In addition, sucrose protects against later-in-life hypersensitivity consequences to neonatal pain.
Collapse
Affiliation(s)
- Khawla Q Nuseir
- Department of Clinical Pharmacy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid, Jordan.
| | - Ahmad Y Altarifi
- Department of Pharmacology, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
| | - Alaa Tasslaq
- Department of Clinical Pharmacy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid, Jordan
| | - Ahmd Y Alhusban
- Department of Clinical Pharmacy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid, Jordan
| | - Karem H Alzoubi
- Department of Clinical Pharmacy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid, Jordan
| |
Collapse
|
9
|
Chau CMY, Ranger M, Bichin M, Park MTM, Amaral RSC, Chakravarty M, Poskitt K, Synnes AR, Miller SP, Grunau RE. Hippocampus, Amygdala, and Thalamus Volumes in Very Preterm Children at 8 Years: Neonatal Pain and Genetic Variation. Front Behav Neurosci 2019; 13:51. [PMID: 30941021 PMCID: PMC6433974 DOI: 10.3389/fnbeh.2019.00051] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 03/01/2019] [Indexed: 01/09/2023] Open
Abstract
Altered hippocampal morphology and reduced volumes have been found in children born preterm compared to full-term. Stress inhibits neurogenesis in the hippocampus, and neonatal stress/noxious stimulation in rodent pups are associated with long-term alterations in hippocampal volumes. We have previously shown reduced cortical thickness and cerebellar volumes in relation to more exposure to pain-related stress of neonatal invasive procedures in children born very preterm. We have reported targeted gene-by-pain environment interactions that contribute to long-term brain development and outcomes in this population. We now aim to determine whether exposure to pain-related stress (adjusted for clinical factors and genotype) differentially impacts regional structures within the limbic system and thalamus, and investigate relationships with outcomes in very preterm children. Our study included 57 children born very preterm (<32 weeks GA) followed longitudinally from birth who underwent 3-D T1 MRI neuroimaging at ∼8 years. Hippocampal subfields and white matter tracts, thalamus and amygdala were automatically segmented using the MAGeT Brain algorithm. The relationship between those subcortical brain volumes (adjusted for total brain volume) and neonatal invasive procedures, gestational age (GA), illness severity, postnatal infection, days of mechanical ventilation, number of surgeries, morphine exposure, and genotype (COMT, SLC6A4, and BDNF) was examined using constrained principal component analysis. We found that neonatal clinical factors and genotypes accounted for 46% of the overall variance in volumes of hippocampal subregions, tracts, basal ganglia, thalamus and amygdala. After controlling for clinical risk factors and total brain volume, greater neonatal invasive procedures was associated with lower volumes in the amygdala and thalamus (p = 0.0001) and an interaction with COMT genotype predicted smaller hippocampal subregional volume (p = 0.0001). More surgeries, days of ventilation, and lower GA were also related to smaller volumes in various subcortical regions (p < 0.002). These reduced volumes were in turn differentially related to poorer cognitive, visual-motor and behavioral outcomes. Our findings highlight the complexity that interplays when examining how exposure to early-life stress may impact brain development both at the structural and functional level, and provide new insight on possible novel avenues of research to discover brain-protective treatments to improve the care of children born preterm.
Collapse
Affiliation(s)
- Cecil M Y Chau
- Department of Pediatrics, The University of British Columbia, Vancouver, BC, Canada.,BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Manon Ranger
- BC Children's Hospital Research Institute, Vancouver, BC, Canada.,School of Nursing, The University of British Columbia, Vancouver, BC, Canada
| | - Mark Bichin
- Department of Pediatrics, The University of British Columbia, Vancouver, BC, Canada
| | - Min Tae M Park
- Department of Psychiatry, The University of Western Ontario, London, ON, Canada.,Cerebral Imaging Centre, Douglas Mental Health University Institute, Montreal, QC, Canada
| | - Robert S C Amaral
- Cerebral Imaging Centre, Douglas Mental Health University Institute, Montreal, QC, Canada
| | - Mallar Chakravarty
- Cerebral Imaging Centre, Douglas Mental Health University Institute, Montreal, QC, Canada
| | - Kenneth Poskitt
- Department of Pediatrics, The University of British Columbia, Vancouver, BC, Canada.,BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Anne R Synnes
- Department of Pediatrics, The University of British Columbia, Vancouver, BC, Canada.,BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Steven P Miller
- Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Ruth E Grunau
- Department of Pediatrics, The University of British Columbia, Vancouver, BC, Canada.,BC Children's Hospital Research Institute, Vancouver, BC, Canada
| |
Collapse
|
10
|
Repeated neonatal needle-prick stimulation increases inflammatory mechanical hypersensitivity in adult rats. Int J Dev Neurosci 2019; 78:191-197. [PMID: 30742972 DOI: 10.1016/j.ijdevneu.2019.02.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 01/31/2019] [Accepted: 02/07/2019] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND AND AIMS Newborn infants are vulnerable to procedural stress and pain exposure on the first weeks of life that represents a critical period for the development of nociceptive, sensory, emotional, and social functions. We evaluated the nociceptive behavior of adult male and female rats that were submitted to nociceptive experience in the neonatal period and the maternal behavior in the postnatal period. METHODS The animals were submitted to repetitive needle pricking from the second to the fifteenth postnatal day (PND 2-15). Maternal behavior and litter weight were evaluated during this period. Mechanical sensitivity to pain was assessed in offsprings during the adulthood by exposing them to inflammatory stimuli, including formalin test or the Freund's complete adjuvant (CFA) injection followed by the electronic von Frey test at 0, 3, 6 and 24 h later. RESULTS Maternal behavior and litter weight were not altered by pinprick stimuli during PND 2-15. Additionally, pinprick stimulation reduced the paw withdrawal threshold in CFA-injected animals compared to control. In the formalin test, there was a difference between the genders. Female rats are statically more sensitive to formalin stimulation and showed an increased licking time in both the first and second phases and increased number of flinches in second phase. CONCLUSIONS Experiencing early life repetitive pain exposure increased inflammatory pain sensitivity in adult offspring rats and female rats are more sensitive to chemical stimulation. IMPLICATIONS Future investigations of the mechanisms involved in this effect may contribute to the improvement of the understanding of inflammatory pain sensitivity differences.
Collapse
|
11
|
Gimenes C, Malheiros JM, Battapady H, Tannus A, Hamani C, Covolan L. The neural response to deep brain stimulation of the anterior nucleus of the thalamus: A MEMRI and c-Fos study. Brain Res Bull 2019; 147:133-139. [PMID: 30658130 DOI: 10.1016/j.brainresbull.2019.01.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 01/07/2019] [Accepted: 01/09/2019] [Indexed: 02/06/2023]
Abstract
BACKGROUND Deep brain stimulation (DBS) refers to the delivery of electric current to specific deep brain structures through implanted electrodes. Recently approved for use in United States, DBS to the anterior nucleus of thalamus (ANT) is a safe and effective alternative treatment for medically refractory seizures. Despite the anti-seizure effects of ANT DBS, preclinical and clinical studies have failed to demonstrate it actions at a whole brain level. OBJECTIVE Here, we used a magnetic resonance imaging (MRI)-based approach in healthy adult rats to investigate the effects of ANT DBS through the circuit of Papez, which has central role in the generation and propagation of limbic seizures, in temporal lobe epilepsy (TLE). METHODS After ANT electrode implantation and recovery, ANT DBS and SHAM (sham animals had electrodes implanted but were not stimulated) rats received one single injection of the contrast enhancer, manganese chloride (60 mg/kg, ip). Twelve hours after, rats underwent the baseline scan using the MEMRI (Manganese-Enhanced Magnetic Resonance Imaging) technique. We used the same MEMRI and parvalbumin sequence to follow the DBS delivered during 1 h (130 Hz and 200 μA). Perfusion was followed by subsequent c-Fos and parvalbumin immunostaining of brain sections. RESULTS Acute unilateral ANT DBS significantly reduced the overall manganese uptake and consequently, the MEMRI contrast in the circuit of Papez. Additionally, c-Fos expression was bilaterally increased in the cingulate cortex and posterior hypothalamus, areas directly connected to ANT, as well as in amygdala and subiculum, within the limbic circuitry. CONCLUSION Our data indicate that MEMRI can be used to detect whole-brain responses to DBS, as the high frequency stimulation parameters used here caused a significant reduction of cell activity in the circuit of Papez that might help to explain the antiepileptic effects of ANT DBS.
Collapse
Affiliation(s)
- Christiane Gimenes
- Department of Physiology, Universidade Federal de Sao Paulo, Sao Paulo, Brazil
| | | | | | - Alberto Tannus
- Physics Institute of Sao Carlos, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Clement Hamani
- Harquail Centre for Neuromodulation, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada
| | - Luciene Covolan
- Department of Physiology, Universidade Federal de Sao Paulo, Sao Paulo, Brazil; Epilepsy Center, Neurological Institute, Cleveland Clinic, Cleveland, OH, USA.
| |
Collapse
|
12
|
Butkevich IP, Mikhailenko VA, Vershinina EA, Aloisi AM, Barr GA. Long-Term Effects of Chronic Buspirone during Adolescence Reduce the Adverse Influences of Neonatal Inflammatory Pain and Stress on Adaptive Behavior in Adult Male Rats. Front Behav Neurosci 2017; 11:11. [PMID: 28184190 PMCID: PMC5266710 DOI: 10.3389/fnbeh.2017.00011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 01/12/2017] [Indexed: 01/07/2023] Open
Abstract
Neonatal pain and stress induce long-term changes in pain sensitivity and behavior. Previously we found alterations in pain sensitivity in adolescent rats exposed to early-life adverse events. We tested whether these alterations have long-lasting effects and if those effects can be improved by the 5-hydroxytryptamine 1A (5-HT1A) receptor agonist buspirone injected chronically during the adolescent period. This study investigates: (1) effects of inflammatory pain (the injection of formalin into the pad of a hind paw) or stress (short maternal deprivation-isolation, MI), or their combination in 1-2-day-old rats on the adult basal pain, formalin-induced pain, anxiety and depression; (2) effects of adolescent buspirone in adult rats that experienced similar early-life insults. Changes in nociceptive thresholds were evaluated using the hot plate (HP) and formalin tests; levels of anxiety and depression were assessed with the elevated plus maze and forced swim tests respectively. Both neonatal painful and stressful treatments induced long-term alterations in the forced swim test. Other changes in adult behavioral responses were dependent on the type of neonatal treatment. There was a notable lack of long-term effects of the combination of early inflammatory pain and stress of MI on the pain responses, anxiety levels or on the effects of adolescent buspirone. This study provides the first evidence that chronic injection of buspirone in adolescent rats alters antinociceptive and anxiolytic effects limited to adult rats that showed behavioral alterations induced by early-life adverse treatments. These data highlight the role of 5-HT1A receptors in long-term effects of neonatal inflammatory pain and stress of short MI on adaptive behavior and possibility of correction of the pain and psychoemotional behavior that were altered by adverse pain/stress intervention using buspirone during critical adolescent period.
Collapse
Affiliation(s)
- Irina P. Butkevich
- Laboratory of Ontogenesis of the Nervous System, I.P. Pavlov Institute of Physiology, Russian Academy of SciencesSt. Petersburg, Russia
| | - Viktor A. Mikhailenko
- Laboratory of Ontogenesis of the Nervous System, I.P. Pavlov Institute of Physiology, Russian Academy of SciencesSt. Petersburg, Russia
| | - Elena A. Vershinina
- Department of Information Technologies and Mathematical Modeling, I.P. Pavlov Institute of Physiology, Russian Academy of SciencesSt. Petersburg, Russia
| | - Anna M. Aloisi
- Department of Medicine, Surgery and Neuroscience, University of SienaSiena, Italy
| | - Gordon A. Barr
- Department of Anesthesiology and Critical Care Medicine, The Children’s Hospital of Philadelphia and the Perelman School of Medicine at the University of PennsylvaniaPhiladelphia, PA, USA
| |
Collapse
|
13
|
Tzeng WY, Wu HH, Wang CY, Chen JC, Yu L, Cherng CG. Sex Differences in Stress and Group Housing Effects on the Number of Newly Proliferated Cells and Neuroblasts in Middle-Aged Dentate Gyrus. Front Behav Neurosci 2017; 10:249. [PMID: 28119581 PMCID: PMC5220061 DOI: 10.3389/fnbeh.2016.00249] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2016] [Accepted: 12/19/2016] [Indexed: 11/13/2022] Open
Abstract
Sex differences in stress and coping responses have been frequently documented in aged people, while whether such differences in aged people may appear at the middle age are unknown. This study was undertaken to study the impact of acute stress and social interaction on early neurogenesis in the dentate gyrus (DG) and hippocampus-related memory in two sexes of middle-aged mice. The number of newly proliferated cells, neuroblasts in DG, the object recognition and location memory in 9-month-old male and female C57BL/6N mice were assessed under baseline conditions as well as following an acute stressor regimen and group housing. Three conspecific companions, serving as "the housing group," were used to model the social interaction throughout the stressor regimen. Males had lower numbers of newly proliferated cells and neuroblasts under baseline conditions as compared to females. The stressor regimen caused rapid decreases in the number of newly proliferated cells and neuroblasts in female DG but no obvious changes were observed in male DG. Group housing, regardless of companions' age, prevented the stress-induced decreases in the number of newly proliferated cells and neuroblasts in female DG. In contrast, the presence of young or age-matched companions potentiated the stress effect in males by decreasing the number of newly proliferated cells and neuroblasts. Finally, neither the stressor regimen nor group housing affected mouse performances in the object recognition and location memory in either sex. These findings, taken together, provide evidence to support a notion that middle-aged females appear to demonstrate more stress susceptibility on early neurogenesis in DG as compared to middle-aged males, although the hippocampus-related memory performances are comparable and not affected by stress in these males and females. Experiencing stress, middle-aged females are more prone to benefit from social interaction as compared to middle-aged males in this regard. We suggest, accordingly, that involving social interaction may afford a therapeutic advance in preventing stress-produced decreases in early neurogenesis in middle-aged females' DG.
Collapse
Affiliation(s)
- Wen-Yu Tzeng
- Department of Physiology, National Cheng Kung University College of Medicine Tainan, Taiwan
| | - Hsin-Hua Wu
- Department of Physiology, National Cheng Kung University College of Medicine Tainan, Taiwan
| | - Ching-Yi Wang
- Institute of Basic Medical Sciences, National Cheng Kung University College of Medicine Tainan, Taiwan
| | - Jin-Chung Chen
- Graduate Institute of Biomedical Sciences, Chang Gung University Taoyuan, Taiwan
| | - Lung Yu
- Department of Physiology, National Cheng Kung University College of MedicineTainan, Taiwan; Institute of Basic Medical Sciences, National Cheng Kung University College of MedicineTainan, Taiwan
| | - Chianfang G Cherng
- Department of Health Psychology, Chang Jung Christian University Tainan, Taiwan
| |
Collapse
|
14
|
Moon M, Jeong HU, Choi JG, Jeon SG, Song EJ, Hong SP, Oh MS. Memory-enhancing effects of Cuscuta japonica Choisy via enhancement of adult hippocampal neurogenesis in mice. Behav Brain Res 2016; 311:173-182. [DOI: 10.1016/j.bbr.2016.05.031] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Revised: 05/08/2016] [Accepted: 05/12/2016] [Indexed: 10/21/2022]
|
15
|
Impact of neonatal anoxia on adult rat hippocampal volume, neurogenesis and behavior. Behav Brain Res 2016; 296:331-338. [DOI: 10.1016/j.bbr.2015.08.039] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 08/26/2015] [Accepted: 08/30/2015] [Indexed: 01/02/2023]
|
16
|
Devonshire I, Greenspon C, Hathway G. Developmental alterations in noxious-evoked EEG activity recorded from rat primary somatosensory cortex. Neuroscience 2015; 305:343-50. [DOI: 10.1016/j.neuroscience.2015.08.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Revised: 07/27/2015] [Accepted: 08/01/2015] [Indexed: 01/29/2023]
|
17
|
Amaral C, Antonio B, Oliveira MGM, Hamani C, Guinsburg R, Covolan L. Early postnatal nociceptive stimulation results in deficits of spatial memory in male rats. Neurobiol Learn Mem 2015; 125:120-5. [PMID: 26348792 DOI: 10.1016/j.nlm.2015.08.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 08/18/2015] [Accepted: 08/27/2015] [Indexed: 01/21/2023]
Abstract
Prematurely-born infants are exposed to multiple invasive procedures while in the intensive care unit. Newborn rats and humans have similar behavioral responses to noxious stimulation. Previous studies have shown that early noxious stimuli may alter dentate gyrus neurogenesis and the behavioral repertoire of adult rats. We evaluated the late effects of noxious stimulation administered during different phases of development on two spatial memory tests; object recognition (OR) and Morris water maze (WM) tests. Noxious stimulation was induced by an intra-plantar injection of complete Freund's adjuvant (CFA) on postnatal (P) day 1 (group P1) or 8 (P8). Control animals were not stimulated. Behavioral tests were conducted on P60 in both male and female animals. In the WM, three domains were evaluated: acquisition, probe trial performance and reversal re-acquisition. The number of Nissl stained cells in the dentate granule cell layer was assessed by stereological counting. The OR test revealed that P1 male rats had poor long-term memory compared to the control and P8 groups. In the WM, no short- or long-term memory differences were detected between early postnatal-stimulated male and female rats and their respective controls. However, the ability to find the hidden platform in a new position was reduced in P1 male rats. The number of dentate granule cells in P8 males was higher than in all other groups. This study demonstrates that noxious stimulation on P1 results in spatial learning deficits in male animals, but does not disrupt the development of the hippocampus-dependent strategies of learning and memory.
Collapse
Affiliation(s)
- Cristiane Amaral
- Departamento de Fisiologia, Universidade Federal de São Paulo, São Paulo 04023-062, Brazil
| | - Bruno Antonio
- Departamento de Psicobiologia, Universidade Federal de São Paulo, São Paulo 04023-062, Brazil
| | | | - Clement Hamani
- Departamento de Fisiologia, Universidade Federal de São Paulo, São Paulo 04023-062, Brazil; Research Imaging Centre, Centre for Addiction and Mental Health, 250 College Street, Toronto, ON M5T 1R8, Canada; Division of Neurosurgery, Toronto Western Hospital, University of Toronto, 399 Bathurst Street, M5T2S8, Canada
| | - Ruth Guinsburg
- Disciplina de Pediatria Neonatal, Departamento de Pediatria, Universidade Federal de São Paulo, São Paulo 04023-062, Brazil
| | - Luciene Covolan
- Departamento de Fisiologia, Universidade Federal de São Paulo, São Paulo 04023-062, Brazil.
| |
Collapse
|
18
|
Mikhailenko VA, Butkevich IP, Vershinina EA, Ulanova NA. Long-term changes in adaptive behavior of rats after inflammatory pain stimulation during neonatal development. J EVOL BIOCHEM PHYS+ 2015. [DOI: 10.1134/s0022093015020052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
19
|
Nuseir KQ, Alzoubi KH, Alabwaini J, Khabour OF, Kassab MI. Sucrose-induced analgesia during early life modulates adulthood learning and memory formation. Physiol Behav 2015; 145:84-90. [PMID: 25846434 DOI: 10.1016/j.physbeh.2015.04.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Revised: 02/02/2015] [Accepted: 04/02/2015] [Indexed: 12/25/2022]
Abstract
This study is aimed at examining the long-term effects of chronic pain during early life (postnatal day 0 to 8weeks), and intervention using sucrose, on cognitive functions during adulthood in rats. Pain was induced in rat pups via needle pricks of the paws. Sucrose solution or paracetamol was administered for analgesia before the paw prick. Control groups include tactile stimulation to account for handling and touching the paws, and sucrose alone was used. All treatments were started on day one of birth and continued for 8weeks. At the end of the treatments, behavioral studies were conducted to test the spatial learning and memory using radial arm water maze (RAWM), as well as pain threshold via foot-withdrawal response to a hot plate apparatus. Additionally, the hippocampus was dissected, and blood was collected. Levels of neurotrophins (BDNF, IGF-1 and NT-3) and endorphins were assessed using ELISA. The results show that chronic noxious stimulation resulted in comparable foot-withdrawal latency between noxious and tactile groups. On the other hand, pretreatment with sucrose or paracetamol increased pain threshold significantly both in naive rats and noxiously stimulated rats (P<0.05). Chronic pain during early life impaired short-term memory, and sucrose treatment prevented such impairment (P<0.05). Sucrose significantly increased serum levels of endorphin and enkephalin. Chronic pain decreased levels of BDNF in the hippocampus and this decrease was prevented by sucrose and paracetamol treatments. Hippocampal levels of NT-3 and IGF-1 were not affected by any treatment. In conclusion, chronic pain induction during early life induced short memory impairment, and pretreatment with sucrose prevented this impairment via mechanisms that seem to involve BDNF. As evident in the results, sucrose, whether alone or in the presence of pre-noxious stimulation, increases pain threshold in such circumstances; most likely via a mechanism that involves an increase in endogenous opioids.
Collapse
Affiliation(s)
- Khawla Q Nuseir
- Department of Clinical Pharmacy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid, Jordan.
| | - Karem H Alzoubi
- Department of Clinical Pharmacy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid, Jordan
| | - Jehad Alabwaini
- Department of Clinical Pharmacy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid, Jordan
| | - Omar F Khabour
- Department of Biology, Faculty of Science, Tibah University, Al Madinah, Saudi Arabia; Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, Jordan University of Science and Technology, Irbid, Jordan
| | - Manal I Kassab
- Department of Maternal and Child Health Nursing, Faculty of Nursing, Jordan University of Science and Technology, Irbid, Jordan
| |
Collapse
|
20
|
Malheiros JM, Guinsburg R, Covolan L. Cortical modulation of pain: comments on "exacerbation of tonic but not phasic pain by entorhinal cortex lesions". Neurosci Lett 2014; 581:135-6. [PMID: 25128752 DOI: 10.1016/j.neulet.2014.08.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2014] [Accepted: 08/05/2014] [Indexed: 01/21/2023]
Affiliation(s)
| | - Ruth Guinsburg
- Department of Pediatrics, Universidade Federal de São Paulo - UNIFESP, São Paulo 04023-062, Brazil
| | - Luciene Covolan
- Departmento of Phyisiology, Universidade Federal de São Paulo - UNIFESP, São Paulo 04023-062, Brazil.
| |
Collapse
|
21
|
Abstract
Two-thirds of individuals with Alzheimer's disease (AD) are women, owing largely to the fact that women outlive men (https://www.alz.org/downloads/facts_figures_2012.pdf). Women's increased longevity, however, is not sufficient to explain the fact that women are 1.5 times more likely than men to develop the disease (Gao et al., 1998). After age 80, the incidence of AD is much higher in women than in men, such that the proportion of women with AD is almost twice the proportion of men with the disease (e.g., Zandi et al., 2002; Plassman et al., 2007). Moreover, once diagnosed with AD, women decline more rapidly, both cognitively and functionally, compared to men (Ito et al., 2011; Tschanz et al., 2011).
Collapse
|
22
|
Zhang Y, Liu FY, Liao FF, Wan Y, Yi M. Exacerbation of tonic but not phasic pain by entorhinal cortex lesions. Neurosci Lett 2014; 581:137-42. [PMID: 24840135 DOI: 10.1016/j.neulet.2014.05.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 05/07/2014] [Accepted: 05/09/2014] [Indexed: 01/21/2023]
Abstract
The hippocampus is actively involved in pain modulation. Previous studies have shown that inhibition, resection or pharmacological interference of the hippocampus or its subcortical afferent sources such as the medial septum and amygdala produce anti-nociceptive effects. But how the cortical connections of the hippocampus modulate pain remains unexplored. The entorhinal cortex (EC) constitutes the major gateway between the hippocampus and the neocortex. In the present study, rats with medial (MEC), lateral (LEC) or sham EC lesions and received the hot plate and the intra-plantar formalin injection tests. Neither MEC nor LEC lesions affected the hot plate test and the first phase of the formalin test. In contrast, paw licking responses in the second phase of the formalin test significantly increased with both MEC and LEC lesions. These results suggested that that the hippocampal-cortical interactions channeled by the EC were involved in tonic but not phasic pain conditions, and that cortical and sub-cortical connections of the hippocampus played independent roles in pain modulation.
Collapse
Affiliation(s)
- Yu Zhang
- Neuroscience Research Institute, Peking University , 38 Xueyuan Road, Beijing 100191, PR China
| | - Feng-Yu Liu
- Neuroscience Research Institute, Peking University , 38 Xueyuan Road, Beijing 100191, PR China
| | - Fei-Fei Liao
- Key Laboratory for Neuroscience, Ministry of Education/National Health and Family Planning Commission, 38 Xueyuan Road, Beijing 100191, PR China
| | - You Wan
- Neuroscience Research Institute, Peking University , 38 Xueyuan Road, Beijing 100191, PR China; Key Laboratory for Neuroscience, Ministry of Education/National Health and Family Planning Commission, 38 Xueyuan Road, Beijing 100191, PR China; Department of Neurobiology, Peking University, 38 Xueyuan Road, Beijing 100191, PR China
| | - Ming Yi
- Neuroscience Research Institute, Peking University , 38 Xueyuan Road, Beijing 100191, PR China.
| |
Collapse
|
23
|
Malheiros J, Amaral C, Leslie A, Guinsburg R, Covolan L. An Experimental Model of Neonatal Nociceptive Stimulation in Rats. Bio Protoc 2014. [DOI: 10.21769/bioprotoc.1283] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
|