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Taylor M, Cheng AB, Hodkinson DJ, Afacan O, Zurakowski D, Bajic D. Body size and brain volumetry in the rat following prolonged morphine administration in infancy and adulthood. FRONTIERS IN PAIN RESEARCH 2023; 4:962783. [PMID: 36923651 PMCID: PMC10008895 DOI: 10.3389/fpain.2023.962783] [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: 06/06/2022] [Accepted: 01/20/2023] [Indexed: 02/28/2023] Open
Abstract
Background Prolonged morphine treatment in infancy is associated with a high incidence of opioid tolerance and dependence, but our knowledge of the long-term consequences of this treatment is sparse. Using a rodent model, we examined the (1) short- and (2) long-term effects of prolonged morphine administration in infancy on body weight and brain volume, and (3) we evaluated if subsequent dosing in adulthood poses an increased brain vulnerability. Methods Newborn rats received subcutaneous injections of either morphine or equal volume of saline twice daily for the first two weeks of life. In adulthood, animals received an additional two weeks of saline or morphine injections before undergoing structural brain MRI. After completion of treatment, structural T2-weigthed MRI images were acquired on a 7 T preclinical scanner (Bruker) using a RARE FSE sequence. Total and regional brain volumes were manually extracted from the MRI images using ITK-SNAP (v.3.6). Regions of interest included the brainstem, the cerebellum, as well as the forebrain and its components: the cerebral cortex, hippocampus, and deep gray matter (including basal ganglia, thalamus, hypothalamus, ventral tegmental area). Absolute (cm3) and normalized (as % total brain volume) values were compared using a one-way ANOVA with Tukey HSD post-hoc test. Results Prolonged morphine administration in infancy was associated with lower body weight and globally smaller brain volumes, which was not different between the sexes. In adulthood, females had lower body weights than males, but no difference was observed in brain volumes between treatment groups. Our results are suggestive of no long-term effect of prolonged morphine treatment in infancy with respect to body weight and brain size in either sex. Interestingly, prolonged morphine administration in adulthood was associated with smaller brain volumes that differed by sex only in case of previous exposure to morphine in infancy. Specifically, we report significantly smaller total brain volume of female rats on account of decreased volumes of forebrain and cortex. Conclusions Our study provides insight into the short- and long-term consequences of prolonged morphine administration in an infant rat model and suggests brain vulnerability to subsequent exposure in adulthood that might differ with sex.
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Affiliation(s)
- Milo Taylor
- Department of Anesthesiology, Critical Care and Pain Medicine, Boston Children’s Hospital, Boston, MA, United States
- Harvard College, Massachusetts Hall, Cambridge, MA, United States
| | - Anya Brooke Cheng
- Department of Anesthesiology, Critical Care and Pain Medicine, Boston Children’s Hospital, Boston, MA, United States
- Harvard College, Massachusetts Hall, Cambridge, MA, United States
| | - Duncan Jack Hodkinson
- Division of Clinical Neuroscience, School of Medicine, University of Nottingham, Nottingham, United Kingdom
- Sir Peter Mansfield Imaging Centre, School of Medicine, University of Nottingham, Nottingham, United Kingdom
- National Institute for Health Research (NIHR), Nottingham Biomedical Research Center, Queens Medical Center, Nottingham, United Kingdom
- Versus Arthritis Pain Centre, University of Nottingham, Nottingham, United Kingdom
| | - Onur Afacan
- Department of Radiology, Boston Children’s Hospital, Boston, MA, United States
- Harvard Medical School, Boston, MA, United States
| | - David Zurakowski
- Department of Anesthesiology, Critical Care and Pain Medicine, Boston Children’s Hospital, Boston, MA, United States
- Harvard Medical School, Boston, MA, United States
| | - Dusica Bajic
- Department of Anesthesiology, Critical Care and Pain Medicine, Boston Children’s Hospital, Boston, MA, United States
- Harvard Medical School, Boston, MA, United States
- Correspondence: Dusica Bajic
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2
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Yazdanfar N, Ali Mard S, Mahmoudi J, Bakhtiari N, Sarkaki A, Farnam A. Maternal Morphine Exposure and Post-Weaning Social Isolation Impair Memory and Ventral Striatum Dopamine System in Male Offspring: Is an Enriched Environment Beneficial? Neuroscience 2021; 461:80-90. [PMID: 33662528 DOI: 10.1016/j.neuroscience.2021.02.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 02/18/2021] [Accepted: 02/19/2021] [Indexed: 12/19/2022]
Abstract
Maternal opioids abuse has some deleterious consequences on next generations. Besides, children's rearing conditions can affect the behavioral states and brain plasticity in their later life. In the present study, we investigated the effects of maternal morphine (MOR) treatment and post-weaning rearing conditions on memory, pain threshold, and the ventral striatum dopaminergic activity in male offspring. Female Wistar rats were treated twice daily either with escalating doses of MOR or with normal saline (NS) one week before mating, during pregnancy and lactation. After weaning, the male pups were assigned to six groups and then raised for an 8-week period under three different conditions: standard (STD), isolated (ISO) or enriched environment (EE). The behavioral tests, including passive avoidance task, novel object recognition, and tail-flick test, were also performed. Moreover, the ventral striatum dopamine's content (DA), mRNA expressions of dopamine receptor 1(D1R) and dopamine receptor 2 (D2R), and dopamine transporter (DAT) were evaluated. The obtained data showed that maternal MOR exposure and post-weaning social isolation could dramatically impair memory in offspring, while EE could reverse these adverse outcomes. Moreover, results of tail flick latency indicated the increased pain threshold in EE animals. At molecular level, maternal MOR injections and social isolation reduced DA levels and altered expressions of D1R, D2R, and DAT within the ventral striatum of these male offspring. However, post-weaning EE partially buffered these changes. Our finding signified the effects of maternal MOR exposure and social isolation on the behaviors and neurochemistry of brain in next generation, and it also provided evidence on reversibility of these alterations following EE.
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Affiliation(s)
- Neda Yazdanfar
- Department of Neuroscience and Cognition, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran; Neurosciences Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Seyed Ali Mard
- The Persian Gulf Physiology Research Center, Medical Basic Sciences Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Department of Physiology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Javad Mahmoudi
- Neurosciences Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Nima Bakhtiari
- Pain Research Center, Imam Khomeini Hospital, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Alireza Sarkaki
- The Persian Gulf Physiology Research Center, Medical Basic Sciences Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Department of Physiology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
| | - Alireza Farnam
- Research Center of Psychiatry and Behavioral Sciences, Tabriz University of Medical Sciences, Tabriz, Iran.
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Cioato SG, Medeiros LF, Lopes BC, de Souza A, Medeiros HR, Assumpção JAF, Caumo W, Roesler R, Torres ILS. Antinociceptive and neurochemical effects of a single dose of IB-MECA in chronic pain rat models. Purinergic Signal 2020; 16:573-584. [PMID: 33161497 PMCID: PMC7855191 DOI: 10.1007/s11302-020-09751-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Accepted: 10/18/2020] [Indexed: 12/31/2022] Open
Abstract
This study aimed to evaluate the effect of a single administration of IB-MECA, an A3 adenosine receptor agonist, upon the nociceptive response and central biomarkers of rats submitted to chronic pain models. A total of 136 adult male Wistar rats were divided into two protocols: (1) chronic inflammatory pain (CIP) using complete Freund's adjuvant and (2) neuropathic pain (NP) by chronic constriction injury of the sciatic nerve. Thermal and mechanical hyperalgesia was measured using von Frey (VF), Randal-Selitto (RS), and hot plate (HP) tests. Rats were treated with a single dose of IB-MECA (0.5 μmol/kg i.p.), a vehicle (dimethyl sulfoxide-DMSO), or positive control (morphine, 5 mg/kg i.p.). Interleukin 1β (IL-1β), brain-derived neurotrophic factor (BDNF), and nerve growth factor (NGF) levels were measured in the brainstem and spinal cord using enzyme-linked immunosorbent assay (ELISA). The establishment of the chronic pain (CIP or NP) model was observed 14 days after induction by a decreased nociceptive threshold in all three tests (GEE, P < 0.05). The antinociceptive effect of a single dose of IB-MECA was observed in both chronic pain models, but this was more effective in NP model. There was an increase in IL-1β levels promoted by CIP. NP model promoted increase in the brainstem BDNF levels, which was reversed by IB-MECA.
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Affiliation(s)
- Stefania Giotti Cioato
- Laboratório de Farmacologia da Dor e Neuromodulação, Investigações Pré-clínicas, Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2350, Porto Alegre, RS, 90035-007, Brazil
- Unidade de Experimentação Animal, Grupo de Pesquisa e Pós-Graduação, HCPA, Porto Alegre, RS, Brazil
- Programa de Pós-Graduação em Ciências Biológicas, Farmacologia e Terapêutica, Instituto de Ciências Básicas da Saúde (ICBS), UFRGS, Porto Alegre, RS, Brazil
| | - Liciane Fernandes Medeiros
- Laboratório de Farmacologia da Dor e Neuromodulação, Investigações Pré-clínicas, Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2350, Porto Alegre, RS, 90035-007, Brazil
- Unidade de Experimentação Animal, Grupo de Pesquisa e Pós-Graduação, HCPA, Porto Alegre, RS, Brazil
- Programa de Pós-Graduação em Ciências Biológicas, Farmacologia e Terapêutica, Instituto de Ciências Básicas da Saúde (ICBS), UFRGS, Porto Alegre, RS, Brazil
- Programa de Pós-Graduação em Saúde e Desenvolvimento Humano, Universidade La Salle, Canoas, RS, Brazil
| | - Bettega Costa Lopes
- Laboratório de Farmacologia da Dor e Neuromodulação, Investigações Pré-clínicas, Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2350, Porto Alegre, RS, 90035-007, Brazil
- Unidade de Experimentação Animal, Grupo de Pesquisa e Pós-Graduação, HCPA, Porto Alegre, RS, Brazil
- Programa de Pós-Graduação em Ciências Biológicas: Fisiologia, ICBS, UFRGS, Porto Alegre, RS, Brazil
| | - Andressa de Souza
- Laboratório de Farmacologia da Dor e Neuromodulação, Investigações Pré-clínicas, Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2350, Porto Alegre, RS, 90035-007, Brazil
- Programa de Pós-Graduação em Saúde e Desenvolvimento Humano, Universidade La Salle, Canoas, RS, Brazil
| | - Helouise Richardt Medeiros
- Laboratório de Farmacologia da Dor e Neuromodulação, Investigações Pré-clínicas, Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2350, Porto Alegre, RS, 90035-007, Brazil
- Unidade de Experimentação Animal, Grupo de Pesquisa e Pós-Graduação, HCPA, Porto Alegre, RS, Brazil
- Programa de Pós-Graduação em Medicina, Ciências Médicas, UFRGS, Porto Alegre, RS, Brazil
| | - José Antônio Fagundes Assumpção
- Laboratório de Farmacologia da Dor e Neuromodulação, Investigações Pré-clínicas, Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2350, Porto Alegre, RS, 90035-007, Brazil
- Unidade de Experimentação Animal, Grupo de Pesquisa e Pós-Graduação, HCPA, Porto Alegre, RS, Brazil
- Programa de Pós-Graduação em Ciências Biológicas, Farmacologia e Terapêutica, Instituto de Ciências Básicas da Saúde (ICBS), UFRGS, Porto Alegre, RS, Brazil
| | - Wolnei Caumo
- Programa de Pós-Graduação em Medicina, Ciências Médicas, UFRGS, Porto Alegre, RS, Brazil
| | - Rafael Roesler
- Programa de Pós-Graduação em Ciências Biológicas, Farmacologia e Terapêutica, Instituto de Ciências Básicas da Saúde (ICBS), UFRGS, Porto Alegre, RS, Brazil
- Programa de Pós-Graduação em Medicina, Ciências Médicas, UFRGS, Porto Alegre, RS, Brazil
- Cancer and Neurobiology Laboratory, Experimental Research Center, HCPA, Porto Alegre, RS, Brazil
| | - Iraci L S Torres
- Laboratório de Farmacologia da Dor e Neuromodulação, Investigações Pré-clínicas, Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2350, Porto Alegre, RS, 90035-007, Brazil.
- Unidade de Experimentação Animal, Grupo de Pesquisa e Pós-Graduação, HCPA, Porto Alegre, RS, Brazil.
- Programa de Pós-Graduação em Ciências Biológicas, Farmacologia e Terapêutica, Instituto de Ciências Básicas da Saúde (ICBS), UFRGS, Porto Alegre, RS, Brazil.
- Programa de Pós-Graduação em Medicina, Ciências Médicas, UFRGS, Porto Alegre, RS, Brazil.
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Neonatal morphine exposure and maternal deprivation alter nociceptive response and central biomarkers' levels throughout the life of rats. Neurosci Lett 2020; 738:135350. [PMID: 32889004 DOI: 10.1016/j.neulet.2020.135350] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 08/26/2020] [Accepted: 08/31/2020] [Indexed: 11/20/2022]
Abstract
In the present study, we investigated the effect of repeated neonatal morphine exposure and/or maternal deprivation(MD) on the nociceptive response and central biomarkers' BDNF, IL-1β, and IL-4 levels at postnatal days 16(PND16), 30(PND30), and 60(PND60). At birth, the litters were standardized to contain 8 pups/dam (n = 58). From PND1 to PND10, the pups of the deprived groups were separated daily from their mothers for 3 h and divided into 5 groups: control(C), saline(S), morphine(M), deprived-saline(DS), and deprived-morphine(DM). The pups received subcutaneous injections of saline/morphine (5 μg) in the mid-scapular area between PND8 and PND14. Nociceptive responses were assessed by hot plate(HP) and tail-flick(TFL) tests and biomarker levels by ELISA. Thermal hyperalgesia(HP) was found in all assessments for the M, DS, and DM groups, and a decrease in nociceptive threshold(TFL) was found in the DS group at PND16; M and DM groups at PND30; and M, DS, and DM groups at PND60. There were interactions between treatment/deprivation/timepoint in all central biomarkers' levels. The current study indicates that neonatal exposure to morphine and MD, which occurs in the pediatric ICU, can alter the nociceptive and neuroinflammatory responses.
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5
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Medeiros LF, Nunes ÉA, Lopes BC, de Souza A, Cappellari AR, de Freitas JS, de Macedo IC, Kuo J, Cioato SG, Battastini AMDO, Caumo W, Torres ILS. Single exercise stress reduces central neurotrophins levels and adenosine A 1 and A 2 receptors expression, but does not revert opioid-induced hyperalgesia in rats. Int J Dev Neurosci 2020; 80:636-647. [PMID: 32798310 DOI: 10.1002/jdn.10059] [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: 05/01/2020] [Revised: 08/06/2020] [Accepted: 08/07/2020] [Indexed: 11/07/2022] Open
Abstract
BACKGROUND This study assessed the effects of an acute stress model upon the long-term hyperalgesia induced by repeated morphine administration in neonatal rats. We also evaluated neurotrophins and cytokines levels; expressions of adenosine and acetylcholine receptors, and acetylcholinesterase enzyme at the spinal cord. MATERIAL AND METHODS Male Wistar rats were subjected to morphine or saline administration from P8 to P14. Thermal hyperalgesia and mechanical hyperesthesia were assessed using the hot plate (HP) and von Frey (vF) tests, respectively, at postnatal day P30 and P60. After baseline measurements, rats were subjected to a single exercise session, as an acute stress model, at P30 or P60. We measured the levels of BDNF and NGF, interleukin-6, and IL-10 in the cerebral cortex and the brainstem; and the expression levels of adenosine and muscarinic receptors, as well as acetylcholinesterase (AChE) enzyme at the spinal cord. RESULTS A stress exercise session was not able to revert the morphine-induced hyperalgesia. The morphine and exercise association in rats induced a decrease in the neurotrophins brainstem levels, and A1 , A2A , A2B receptors expression in the spinal cord, and an increase in the IL-6 cortical levels. The exercise reduced M2 receptors expression in the spinal cord of naive rats, while morphine prevented this effect. CONCLUSIONS Single session of exercise does not revert hyperalgesia induced by morphine in rats; however, morphine plus exercise modulate neurotrophins, IL-6 central levels, and expression of adenosine receptors.
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Affiliation(s)
- Liciane Fernandes Medeiros
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré-clínicas, Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil.,Programa de Pós-Graduação em Saúde e Desenvolvimento Humano, Universidade La Salle, Canoas, Brazil
| | - Éllen Almeida Nunes
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré-clínicas, Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil.,Programa de Pós-Graduação em Ciências Biológicas: Fisiologia, Instituto de Ciências Básicas da Saúde (ICBS), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Bettega Costa Lopes
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré-clínicas, Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil.,Programa de Pós-Graduação em Ciências Biológicas: Fisiologia, Instituto de Ciências Básicas da Saúde (ICBS), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Andressa de Souza
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré-clínicas, Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil.,Programa de Pós-Graduação em Saúde e Desenvolvimento Humano, Universidade La Salle, Canoas, Brazil.,Programa de Pós-Graduação em Medicina: Ciências Médicas, Faculdade de Medicina, UFRGS, Porto Alegre, Brazil
| | - Angélica Regina Cappellari
- Programa de Pós-Graduação em Biologia Celular e Molecular, Escola de Ciências da Saúde e da Vida, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Joice Soares de Freitas
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré-clínicas, Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil
| | - Isabel Cristina de Macedo
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré-clínicas, Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil
| | - Jonnsin Kuo
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré-clínicas, Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil
| | - Stefania Giotti Cioato
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré-clínicas, Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil
| | | | - Wolnei Caumo
- Programa de Pós-Graduação em Medicina: Ciências Médicas, Faculdade de Medicina, UFRGS, Porto Alegre, Brazil
| | - Iraci L S Torres
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré-clínicas, Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil.,Programa de Pós-Graduação em Ciências Biológicas: Fisiologia, Instituto de Ciências Básicas da Saúde (ICBS), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil.,Programa de Pós-Graduação em Medicina: Ciências Médicas, Faculdade de Medicina, UFRGS, Porto Alegre, Brazil
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Ströher R, de Oliveira C, Costa Lopes B, da Silva LS, Regner GG, Richardt Medeiros H, de Macedo IC, Caumo W, Torres ILS. Maternal deprivation alters nociceptive response in a gender-dependent manner in rats. Int J Dev Neurosci 2019; 76:25-33. [PMID: 31071409 DOI: 10.1016/j.ijdevneu.2019.05.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Revised: 04/07/2019] [Accepted: 05/03/2019] [Indexed: 12/27/2022] Open
Abstract
The present study aimed at investigating both the early and long-term effects of maternal deprivation as well as gender on neuromotor reflexes, anxiety behavior and thermal nociceptive responses. A total of 64 Wistar rats pups (32 males, 32 females) were utilized and were deprived of their mother for 3 h/daily, from postnatal day 1 (P1) until P10. Successively, animals were divided into 2 groups: control group (C) - pups no subjected to intervention; and the maternal-deprived group (MD): pups subjected to maternal deprivation. The neuromotor reflexes were evaluated through the righting reflex and negative geotaxis tests; the exploratory behavior by open field test (OFT); the anxiety-like behavior by elevated plus-maze test (EPM); the thermal nociceptive responses byhot plate (HP) and tail-flick (TFL) tests. All the animals subjected to maternal deprivation showed a delayed reflex response at P8 in the negative geotaxis test. In contrast, the OFT at P20 identified an effect of gender on the outer crossings and grooming as well as an interaction between gender and maternal deprivation on latency. Additionally, effect of maternal deprivation in the open and closed arms as well as gender effect in the protected head-dipping (PHD) and non-protected head-dipping (NPHD) were observed at P20 (EPM). In contrast, there were a gender effect on latency and an interaction between gender and maternal deprivation on rearing at P42. Moreover, in nociceptive tests was observed an analgesic effect induced by maternal deprivation; however, in the TFL test, only deprived females showed this effect. Surprisingly, only control animals presented an ontogeny nociceptive effect in the HP testat P21 and P43, which may be related to an increase in the inhibitory nociceptive pathways throughout life. In this way, we suggest maternal deprivation to be able to anticipate the maturation of the inhibitory nociceptive pathway. In conclusion, maternal deprivation induced a delayed reflex response at P8 and altered the anxiety and nociceptive behaviors according to the time after exposure to this stressor, in a gender-specific manner.
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Affiliation(s)
- Roberta Ströher
- Programa de Pós-Graduação em Ciências Biológicas, Farmacologia e Terapêutica-Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.,Laboratório de Farmacologia da Dor e Neuromodulação, Investigações Pré-clínicas, Departamento de Farmacologia, ICBS, UFRGS, Porto Alegre, RS, Brazil
| | - Carla de Oliveira
- Laboratório de Farmacologia da Dor e Neuromodulação, Investigações Pré-clínicas, Departamento de Farmacologia, ICBS, UFRGS, Porto Alegre, RS, Brazil.,Programa de Pós-Graduação em Ciências Médicas, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Bettega Costa Lopes
- Laboratório de Farmacologia da Dor e Neuromodulação, Investigações Pré-clínicas, Departamento de Farmacologia, ICBS, UFRGS, Porto Alegre, RS, Brazil.,Programa de Pós-Graduação em Ciências Biológicas, Fisiologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Lisiane Santos da Silva
- Laboratório de Farmacologia da Dor e Neuromodulação, Investigações Pré-clínicas, Departamento de Farmacologia, ICBS, UFRGS, Porto Alegre, RS, Brazil.,Programa de Pós-Graduação em Ciências Médicas, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Gabriela Gregory Regner
- Programa de Pós-Graduação em Ciências Biológicas, Farmacologia e Terapêutica-Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.,Laboratório de Farmacologia da Dor e Neuromodulação, Investigações Pré-clínicas, Departamento de Farmacologia, ICBS, UFRGS, Porto Alegre, RS, Brazil
| | - Helouise Richardt Medeiros
- Laboratório de Farmacologia da Dor e Neuromodulação, Investigações Pré-clínicas, Departamento de Farmacologia, ICBS, UFRGS, Porto Alegre, RS, Brazil.,Programa de Pós-Graduação em Ciências Médicas, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Isabel Cristina de Macedo
- Laboratório de Farmacologia da Dor e Neuromodulação, Investigações Pré-clínicas, Departamento de Farmacologia, ICBS, UFRGS, Porto Alegre, RS, Brazil.,Universidade Federal do Pampa, São Gabriel, RS, Brazil
| | - Wolnei Caumo
- Programa de Pós-Graduação em Ciências Médicas, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Iraci L S Torres
- Programa de Pós-Graduação em Ciências Biológicas, Farmacologia e Terapêutica-Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.,Departamento de Farmacologia, Instituto de CiênciasBásicas da Saúde (ICBS), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.,Laboratório de Farmacologia da Dor e Neuromodulação, Investigações Pré-clínicas, Departamento de Farmacologia, ICBS, UFRGS, Porto Alegre, RS, Brazil.,Programa de Pós-Graduação em Ciências Médicas, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.,Programa de Pós-Graduação em Ciências Biológicas, Fisiologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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7
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Moriarty O, Harrington L, Beggs S, Walker SM. Opioid analgesia and the somatosensory memory of neonatal surgical injury in the adult rat. Br J Anaesth 2018; 121:314-324. [PMID: 29935586 PMCID: PMC6200106 DOI: 10.1016/j.bja.2017.11.111] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 11/25/2017] [Accepted: 11/27/2017] [Indexed: 12/31/2022] Open
Abstract
Background Nociceptive input during early development can produce somatosensory memory that influences future pain response. Hind-paw incision during the 1st postnatal week in the rat enhances re-incision hyperalgesia in adulthood. We now evaluate its modulation by neonatal analgesia. Methods Neonatal rats [Postnatal Day 3 (P3)] received saline, intrathecal morphine 0.1 mg kg−1 (IT), subcutaneous morphine 1 mg kg−1 (SC), or sciatic levobupivacaine block (LA) before and after plantar hind-paw incision (three×2 hourly injections). Six weeks later, behavioural thresholds and electromyography (EMG) measures of re-incision hyperalgesia were compared with an age-matched adult-only incision (IN) group. Morphine effects on spontaneous (conditioned place preference) and evoked (EMG sensitivity) pain after adult incision were compared with prior neonatal incision and saline or morphine groups. The acute neonatal effects of incision and analgesia on behavioural hyperalgesia at P3 were also evaluated. Results Adult re-incision hyperalgesia was not prevented by neonatal peri-incision morphine (saline, IT, and SC groups > IN; P<0.05–0.01). Neonatal sciatic block, but not morphine, prevented the enhanced re-incision reflex sensitivity in adulthood (LA < saline and morphine groups, P<0.01; LA vs IN, not significant). Morphine efficacy in adulthood was altered after morphine alone in the neonatal period, but not when administered with neonatal incision. Morphine prevented the acute incision-induced hyperalgesia in neonatal rats, but only sciatic block had a preventive analgesic effect at 24 h. Conclusions Long-term effects after neonatal injury highlight the need for preventive strategies. Despite effective analgesia at the time of neonatal incision, morphine as a sole analgesic did not alter the somatosensory memory of early-life surgical injury.
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Affiliation(s)
- O Moriarty
- Developmental Neurosciences Programme (Pain Research), UCL Great Ormond Street Institute of Child Health, London, UK
| | - L Harrington
- Neuroscience, Physiology and Pharmacology, University College London, London, UK
| | - S Beggs
- Developmental Neurosciences Programme (Pain Research), UCL Great Ormond Street Institute of Child Health, London, UK; Neuroscience, Physiology and Pharmacology, University College London, London, UK
| | - S M Walker
- Developmental Neurosciences Programme (Pain Research), UCL Great Ormond Street Institute of Child Health, London, UK; Department of Anaesthesia and Pain Medicine, Great Ormond Street Hospital NHS Foundation Trust, London, UK.
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8
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Oliveira C, Scarabelot VL, Vercelino R, Silveira NP, Adachi LN, Regner GG, Silva LS, Macedo IC, Souza A, Caumo W, Torres IL. Morphine exposure and maternal deprivation during the early postnatal period alter neuromotor development and nerve growth factor levels. Int J Dev Neurosci 2017; 63:8-15. [DOI: 10.1016/j.ijdevneu.2017.09.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 09/02/2017] [Accepted: 09/03/2017] [Indexed: 12/17/2022] Open
Affiliation(s)
- Carla Oliveira
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré‐ClínicasDepartamento de FarmacologiaInstituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do SulPorto AlegreBrazil
- Programa de Pós‐Graduaçăo em Medicina: Ciências MédicasFaculdade de MedicinaUniversidade Federal do Rio Grande do SulPorto AlegreBrazil
- Unidade de Experimentação Animal e Grupo de Pesquisa e Pós‐Graduação, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do SulPorto AlegreBrazil
| | - Vanessa L. Scarabelot
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré‐ClínicasDepartamento de FarmacologiaInstituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do SulPorto AlegreBrazil
- Unidade de Experimentação Animal e Grupo de Pesquisa e Pós‐Graduação, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do SulPorto AlegreBrazil
| | - Rafael Vercelino
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré‐ClínicasDepartamento de FarmacologiaInstituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do SulPorto AlegreBrazil
- Centro Universitário FADERGSPorto AlegreRSBrazil
- Health and Wellness School Laureate International Universities
| | - Natalia P. Silveira
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré‐ClínicasDepartamento de FarmacologiaInstituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do SulPorto AlegreBrazil
- Unidade de Experimentação Animal e Grupo de Pesquisa e Pós‐Graduação, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do SulPorto AlegreBrazil
| | - Lauren N.S. Adachi
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré‐ClínicasDepartamento de FarmacologiaInstituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do SulPorto AlegreBrazil
- Programa de Pós‐Graduaçăo em Medicina: Ciências MédicasFaculdade de MedicinaUniversidade Federal do Rio Grande do SulPorto AlegreBrazil
- Unidade de Experimentação Animal e Grupo de Pesquisa e Pós‐Graduação, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do SulPorto AlegreBrazil
| | - Gabriela G. Regner
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré‐ClínicasDepartamento de FarmacologiaInstituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do SulPorto AlegreBrazil
- Unidade de Experimentação Animal e Grupo de Pesquisa e Pós‐Graduação, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do SulPorto AlegreBrazil
| | - Lisiane S. Silva
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré‐ClínicasDepartamento de FarmacologiaInstituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do SulPorto AlegreBrazil
- Unidade de Experimentação Animal e Grupo de Pesquisa e Pós‐Graduação, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do SulPorto AlegreBrazil
| | - Isabel Cristina Macedo
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré‐ClínicasDepartamento de FarmacologiaInstituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do SulPorto AlegreBrazil
- Unidade de Experimentação Animal e Grupo de Pesquisa e Pós‐Graduação, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do SulPorto AlegreBrazil
- Universidade Federal do PampaAvenida Antônio Trilha, 184797300‐000São GabrielRSBrazil
| | - Andressa Souza
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré‐ClínicasDepartamento de FarmacologiaInstituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do SulPorto AlegreBrazil
- Unidade de Experimentação Animal e Grupo de Pesquisa e Pós‐Graduação, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do SulPorto AlegreBrazil
| | - Wolnei Caumo
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré‐ClínicasDepartamento de FarmacologiaInstituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do SulPorto AlegreBrazil
- Programa de Pós‐Graduaçăo em Medicina: Ciências MédicasFaculdade de MedicinaUniversidade Federal do Rio Grande do SulPorto AlegreBrazil
| | - Iraci L.S. Torres
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré‐ClínicasDepartamento de FarmacologiaInstituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do SulPorto AlegreBrazil
- Programa de Pós‐Graduaçăo em Medicina: Ciências MédicasFaculdade de MedicinaUniversidade Federal do Rio Grande do SulPorto AlegreBrazil
- Unidade de Experimentação Animal e Grupo de Pesquisa e Pós‐Graduação, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do SulPorto AlegreBrazil
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9
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Panahi Y, Saboory E, Rassouli A, Sadeghi‐Hashjin G, Roshan‐Milani S, Derafshpour L, Rasmi Y. The effect of selective opioid receptor agonists and antagonists on epileptiform activity in morphine‐dependent infant mice hippocampal slices. Int J Dev Neurosci 2017; 60:56-62. [DOI: 10.1016/j.ijdevneu.2017.04.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2017] [Revised: 04/01/2017] [Accepted: 04/24/2017] [Indexed: 01/13/2023] Open
Affiliation(s)
- Yousef Panahi
- Department of Pharmacology, Faculty of Veterinary MedicineUniversity of TehranTehranIran
| | - Ehsan Saboory
- Neurophysiology Research Center, Urmia University of Medical SciencesUrmiaIran
| | - Ali Rassouli
- Department of Pharmacology, Faculty of Veterinary MedicineUniversity of TehranTehranIran
| | | | - Shiva Roshan‐Milani
- Department of Physiology, Faculty of MedicineUrmia University of Medical SciencesUrmiaIran
| | - Leila Derafshpour
- Neurophysiology Research Center, Urmia University of Medical SciencesUrmiaIran
| | - Yousef Rasmi
- Cellular and Molecular Research Center, Urmia University of Medical SciencesUrmiaIran
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10
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Morphine exposure during early life alters thermal and mechanical thresholds in rats. Int J Dev Neurosci 2016; 60:78-85. [DOI: 10.1016/j.ijdevneu.2016.12.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 12/04/2016] [Accepted: 12/29/2016] [Indexed: 12/20/2022] Open
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11
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Rozisky JR, Scarabelot VL, Oliveira CD, Macedo ICD, Deitos A, Laste G, Caumo W, Torres ILS. Melatonin as a potential counter-effect of hyperalgesia induced by neonatal morphine exposure. Neurosci Lett 2016; 633:77-81. [PMID: 27546822 DOI: 10.1016/j.neulet.2016.08.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 08/11/2016] [Accepted: 08/15/2016] [Indexed: 01/29/2023]
Abstract
Morphine administration in the neonatal period can induce long-term effects in pain circuitry leading to hyperalgesia induced by the opioid in adult life. This study explored a new pharmacological approach for reversing this effect of morphine. We focused on melatonin owing its well-known antinociceptive and anti-inflammatory effects, and its ability to interact with the opioid system. We used the formalin test to assess the medium and long-term effects of melatonin administration on hyperalgesia induced by morphine in early life. Newborn rats were divided into two groups: the control group, which received saline, and the morphine group, which received morphine (5μg subcutaneously [s.c.]) in the mid-scapular area, once daily for 7days, from P8 (postnatal day 8) until P14. At postnatal days 30 (P30) and 60 (P60), both groups were divided in two subgroups, which received melatonin or melatonin vehicle 30min before the formalin test. The nociceptive responses were assessed by analyzing the total time spent biting, flicking, and licking the formalin-injected hind paw; these responses were recorded during the first 5min (neurogenic/acute phase) and from 15 to 30min (inflammatory/tonic phase). Initially, animals in the morphine/vehicle group showed increased nociceptive behavior in phase II (inflammatory) of the formalin test at P30, and in the neurogenic and inflammatory phases at P60. These increased nociceptive responses were fully reversed by melatonin administration at either age. These findings show that melatonin administration is a potential means for countering hyperalgesia induced by neonatal morphine exposure in young and adult rats.
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Affiliation(s)
- Joanna Ripoll Rozisky
- Pain Pharmacology and Neuromodulation Laboratory, Preclinical Research, Department of Pharmacology, Institute of Basic Health Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, 90050-170, Brazil; Postgraduate Program in Medical Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, 90035-003, Brazil; Animal Experimentation Unit, Graduate Research Group, Hospital de Clínicas de Porto Alegre, RS, 90035-003, Brazil
| | - Vanessa Leal Scarabelot
- Pain Pharmacology and Neuromodulation Laboratory, Preclinical Research, Department of Pharmacology, Institute of Basic Health Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, 90050-170, Brazil; Postgraduate Program in Biological Sciences: Physiology, Institute of Health Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, 90050-170, Brazil; Animal Experimentation Unit, Graduate Research Group, Hospital de Clínicas de Porto Alegre, RS, 90035-003, Brazil
| | - Carla de Oliveira
- Pain Pharmacology and Neuromodulation Laboratory, Preclinical Research, Department of Pharmacology, Institute of Basic Health Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, 90050-170, Brazil; Postgraduate Program in Medical Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, 90035-003, Brazil; Animal Experimentation Unit, Graduate Research Group, Hospital de Clínicas de Porto Alegre, RS, 90035-003, Brazil
| | - Isabel Cristina de Macedo
- Pain Pharmacology and Neuromodulation Laboratory, Preclinical Research, Department of Pharmacology, Institute of Basic Health Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, 90050-170, Brazil; Postgraduate Program in Biological Sciences: Physiology, Institute of Health Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, 90050-170, Brazil; Animal Experimentation Unit, Graduate Research Group, Hospital de Clínicas de Porto Alegre, RS, 90035-003, Brazil
| | - Alícia Deitos
- Pain Pharmacology and Neuromodulation Laboratory, Preclinical Research, Department of Pharmacology, Institute of Basic Health Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, 90050-170, Brazil; Postgraduate Program in Medical Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, 90035-003, Brazil; Animal Experimentation Unit, Graduate Research Group, Hospital de Clínicas de Porto Alegre, RS, 90035-003, Brazil
| | - Gabriela Laste
- Pain Pharmacology and Neuromodulation Laboratory, Preclinical Research, Department of Pharmacology, Institute of Basic Health Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, 90050-170, Brazil; Postgraduate Program in Medical Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, 90035-003, Brazil; Animal Experimentation Unit, Graduate Research Group, Hospital de Clínicas de Porto Alegre, RS, 90035-003, Brazil
| | - Wolnei Caumo
- Pain Pharmacology and Neuromodulation Laboratory, Preclinical Research, Department of Pharmacology, Institute of Basic Health Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, 90050-170, Brazil; Postgraduate Program in Medical Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, 90035-003, Brazil
| | - Iraci L S Torres
- Pain Pharmacology and Neuromodulation Laboratory, Preclinical Research, Department of Pharmacology, Institute of Basic Health Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, 90050-170, Brazil; Postgraduate Program in Medical Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, 90035-003, Brazil; Postgraduate Program in Biological Sciences: Physiology, Institute of Health Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, 90050-170, Brazil.
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12
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Saboory E, Gholami M, Zare S, Roshan-Milani S. The long-term effects of neonatal morphine administration on the pentylenetetrazol seizure model in rats: the role of hippocampal cholinergic receptors in adulthood. Dev Psychobiol 2013; 56:498-509. [PMID: 23775703 DOI: 10.1002/dev.21117] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2012] [Accepted: 03/04/2013] [Indexed: 11/07/2022]
Abstract
Early life exposure to opiates may affect neuropathological conditions, such as epilepsy, during adulthood. We investigated whether neonatal morphine exposure affects pentylenetetrazol (PTZ)-induced seizures in adulthood. Male rats were subcutaneously injected with morphine or saline on postnatal days 8-14. During adulthood, each rat was assigned to 1 of the following 10 sub-groups: saline, nicotine (0.1, 0.5, or 1 μg), atropine (0.25 or 1 μg), oxotremorine M (0.1 or 1 μg), or mecamylamine (2 or 8 μg). An intrahippocampal infusion of the indicated compound was administered 30 min before seizure induction (80 mg/kg PTZ). Compared with the saline/oxotremorine (1 μg), saline/saline, and morphine/saline groups, the morphine/oxotremorine (1 μg) group showed a significantly increased latency to the first epileptic behavior. The duration of tonic-clonic seizures was significantly lower in the morphine/oxotremorine (1 μg) group compared to the saline/saline and morphine/saline groups. The severity of seizure was significantly decreased in the morphine/atropine (1 μg) group than in the saline/atropine (1 μg). Seizure severity was also decreased in the morphine/mecamylamine (2 μg) group than in the saline/mecamylamine (2 μg) group. Latency for death was significantly lower in the morphine/mecamylamine (2 μg) group compared with the saline/mecamylamine (2 μg) group. Mortality rates in the morphine/atropine (1 μg) and morphine/mecamylamine (2 μg) groups were significantly lower than those in the saline/atropine (1 μg) and saline/mecamylamine (2 μg) groups, respectively. Chronic neonatal morphine administration attenuated PTZ-induced seizures, reduced the mortality rate, and decreased the impact of the hippocampal cholinergic system on seizures and mortality rate in adult rats. Neonatal morphine exposure induces changes to μ-receptors that may lead to activation of GABAergic neurons in the hippocampus. This pathway may explain the anti-convulsant effects of morphine observed in our study.
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Affiliation(s)
- Ehsan Saboory
- Faculty of Medicine, Department of Physiology, Neurophysiology Research Center, Urmia University of Medical Sciences, Urmia, Iran
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13
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Enquête nationale sur la prise en charge de la douleur liée à l’intubation trachéale du nouveau-né dans les maternités de niveau III. Arch Pediatr 2013; 20:123-9. [DOI: 10.1016/j.arcped.2012.11.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2011] [Revised: 05/15/2012] [Accepted: 11/05/2012] [Indexed: 11/18/2022]
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14
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Rozisky JR, Nonose Y, Laste G, Dos Santos VS, de Macedo IC, Battastini AMO, Caumo W, Torres IL. Morphine treatment alters nucleotidase activities in rat blood serum. J Exp Pharmacol 2012; 4:187-93. [PMID: 27186131 PMCID: PMC4863557 DOI: 10.2147/jep.s34033] [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] [Indexed: 11/23/2022] Open
Abstract
Morphine has been widely used in neonatal pain management. However, this treatment may produce adaptive changes in several physiologic systems. Our laboratory has demonstrated that morphine treatment in neonate rats alters nucleoside triphosphate diphosphohydrolase (NTPDase) activity and gene expression in central nervous system structures. Considering the relationship between the opioid and purinergic systems, our aim was to verify whether treatment with morphine from postnatal days 8 (P8) through 14 (P14) at a dose of 5 μg per day alters NTPDase and 5′-nucleotidase activities in rat serum over the short, medium, and long terms. After the in vivo assay, the morphine group showed increased hydrolysis of all nucleotides at P30, and a decrease in adenosine 5′-diphosphate hydrolysis at P60. Moreover, we found that nucleotidase activities change with age; adenosine 5′-triphosphate hydrolysis activity was lower at P16, and adenosine 5′-monophosphate hydrolysis activity was higher at P60. These changes are very important because these enzymes are the main regulators of blood nucleotide levels and, consequently, nucleotide signaling. Our findings showed that in vivo morphine treatment alters nucleotide hydrolysis in rat blood serum, suggesting that purine homeostasis can be influenced by opioid treatment during the neonatal period.
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Affiliation(s)
- Joanna Ripoll Rozisky
- Laboratório de Farmacologia da Dor e Neuromodulação: Modelos Animais, Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rio Grande do Sul, Brazil; Programa de Pós-Graduação em Medicina, Ciências Médicas, Universidade Federal do Rio Grande do Sul, Rio Grande do Sul, Brazil; Unidade de Experimentação Animal e Grupo de Pesquisa e Pós-Graduação, Hospital de Clínicas de Porto Alegre, Rio Grande do Sul, Brazil
| | - Yasmine Nonose
- Laboratório de Farmacologia da Dor e Neuromodulação: Modelos Animais, Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rio Grande do Sul, Brazil; Unidade de Experimentação Animal e Grupo de Pesquisa e Pós-Graduação, Hospital de Clínicas de Porto Alegre, Rio Grande do Sul, Brazil
| | - Gabriela Laste
- Laboratório de Farmacologia da Dor e Neuromodulação: Modelos Animais, Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rio Grande do Sul, Brazil; Programa de Pós-Graduação em Medicina, Ciências Médicas, Universidade Federal do Rio Grande do Sul, Rio Grande do Sul, Brazil; Unidade de Experimentação Animal e Grupo de Pesquisa e Pós-Graduação, Hospital de Clínicas de Porto Alegre, Rio Grande do Sul, Brazil
| | - Vinicius Souza Dos Santos
- Laboratório de Farmacologia da Dor e Neuromodulação: Modelos Animais, Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rio Grande do Sul, Brazil; Unidade de Experimentação Animal e Grupo de Pesquisa e Pós-Graduação, Hospital de Clínicas de Porto Alegre, Rio Grande do Sul, Brazil
| | - Isabel Cristina de Macedo
- Laboratório de Farmacologia da Dor e Neuromodulação: Modelos Animais, Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rio Grande do Sul, Brazil; Programa de Pós-Graduação em Medicina, Ciências Médicas, Universidade Federal do Rio Grande do Sul, Rio Grande do Sul, Brazil; Unidade de Experimentação Animal e Grupo de Pesquisa e Pós-Graduação, Hospital de Clínicas de Porto Alegre, Rio Grande do Sul, Brazil
| | - Ana Maria Oliveira Battastini
- Programa de Pós-Graduação em Medicina, Ciências Médicas, Universidade Federal do Rio Grande do Sul, Rio Grande do Sul, Brazil; Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rio Grande do Sul, Brazil
| | - Wolnei Caumo
- Programa de Pós-Graduação em Medicina, Ciências Médicas, Universidade Federal do Rio Grande do Sul, Rio Grande do Sul, Brazil; Unidade de Experimentação Animal e Grupo de Pesquisa e Pós-Graduação, Hospital de Clínicas de Porto Alegre, Rio Grande do Sul, Brazil
| | - Iraci Ls Torres
- Laboratório de Farmacologia da Dor e Neuromodulação: Modelos Animais, Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rio Grande do Sul, Brazil; Programa de Pós-Graduação em Medicina, Ciências Médicas, Universidade Federal do Rio Grande do Sul, Rio Grande do Sul, Brazil; Unidade de Experimentação Animal e Grupo de Pesquisa e Pós-Graduação, Hospital de Clínicas de Porto Alegre, Rio Grande do Sul, Brazil
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Neonatal Morphine Administration Leads to Changes in Hippocampal BDNF Levels and Antioxidant Enzyme Activity in the Adult Life of Rats. Neurochem Res 2012; 38:494-503. [DOI: 10.1007/s11064-012-0941-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2012] [Revised: 11/10/2012] [Accepted: 11/26/2012] [Indexed: 10/27/2022]
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16
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Morphine treatment in early life alters glutamate uptake in the spinal synaptosomes of adult rats. Neurosci Lett 2012; 529:51-4. [DOI: 10.1016/j.neulet.2012.09.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2012] [Revised: 08/22/2012] [Accepted: 09/07/2012] [Indexed: 01/28/2023]
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17
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Fentanyl administration in infant rats produces long‐term behavioral responses. Int J Dev Neurosci 2011; 30:25-30. [DOI: 10.1016/j.ijdevneu.2011.10.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2011] [Revised: 10/12/2011] [Accepted: 10/13/2011] [Indexed: 11/22/2022] Open
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18
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Wang S, Zhang L, Ma Y, Chen L, Tian Y, Mao J, Martyn JJA. Nociceptive behavior following hindpaw burn injury in young rats: response to systemic morphine. PAIN MEDICINE 2010; 12:87-98. [PMID: 21143761 DOI: 10.1111/j.1526-4637.2010.01021.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
OBJECTIVE Develop a burn injury model in young age rats. BACKGROUND Management of pain after burn injury in pediatric patients is an unresolved clinical issue. METHODS A burn injury model in young rats of 3-4 weeks old was developed by briefly immersing the dorsal part of the right hindpaw in a hot water bath (85°C) for 12 seconds under pentobarbital anesthesia. RESULTS Burn injury, but not sham control, induced nociceptive behaviors (mechanical allodynia, thermal hyperalgesia) when examined on post-injury day 2, 4, and 7. In burn-injured rats, there was the upregulated expression of the NR1 subunit of the N-methyl-d-aspartate (NMDA) receptor, Akt1, Akt2, and protein kinase C γ (PKCγ), but downregulated expression of neuronal nitric oxide synthase (NOS), inducible NOS, and glycogen synthase kinase-3β, within the spinal cord dorsal horn ipsilateral to burn injury. Moreover, intraperitoneal administration of a clinically available NMDA receptor antagonist dextromethorphan (30 mg/kg, once daily × 7 days beginning on day 7 after burn injury) attenuated mechanical allodynia and thermal hyperalgesia in burn-injured rats. Different from our previous finding in adult burn-injured rats; however, burn injury in young rats of this age did not spontaneously shift the morphine antinociceptive response curve to the right within the dose range used in the study when exposed to morphine for the first time, suggesting that the development of intrinsic tolerance to morphine antinociception may be different from adult rats following burn injury. CONCLUSIONS Our data suggest that this model may be used to explore the mechanisms of burn injury-induced nociception in young rats and to differentiate the sequelae from burn injury between adult and young rats under certain experimental conditions.
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Affiliation(s)
- Shuxing Wang
- MGH Center for Translational Pain Research, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
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Medeiros LF, Rozisky JR, de Souza A, Hidalgo MP, Netto CA, Caumo W, Battastini AMO, Torres ILDS. Lifetime behavioural changes after exposure to anaesthetics in infant rats. Behav Brain Res 2010; 218:51-6. [PMID: 21056062 DOI: 10.1016/j.bbr.2010.10.028] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2010] [Revised: 10/17/2010] [Accepted: 10/22/2010] [Indexed: 11/15/2022]
Abstract
The aim of this study was to assess the effect of acute use of general anaesthetic with or without a surgical procedure, at post-natal day 14 (P14), on behavioural responses in the short-, medium- and long-term, evaluated in open field (OF) and elevated plus-maze (EPM) tests. Fourteen-day-old male Wistar rats were divided into two experimental designs (ED): inhalation and intravenous anaesthetic, and these groups were subdivided into: 1st ED - control (C), isoflurane (ISO), isoflurane/surgery (ISO-SUR); 2nd ED - control (C), fentanyl/S(+)-ketamine (FK) and fentanyl+ketamine-s/surgery (FK-SUR). In the OF the following were found: (a) in the 1st ED: an increase in the locomotor activity in the ISO group at P14, and ISO and ISO-SUR groups at P30; the ISO-SUR group showed a reduced latency to leave the first quadrant at P30 and P60; (b) in the 2nd ED: FK and FK-SUR groups presented increased locomotor activity at P30, and the FK group showed a reduction in the number of faecal boluses. In the EPM the following were found: FK and FK-SUR groups presented an increase in the number of non-protected head-dipping (NPHD) movements and in the number of entries and time spent in open arms at P30; the FK group showed an increased number of protected head-dipping movements, NPHD and entries and time spent in the open arms at P60. The behavioural changes observed may be related to locomotor activity (1st ED) and anxiety level (2nd ED) and they may result from changes in neurotransmitters/hormones (DA, 5HT, CRH) and glutamate/NMDA receptors, respectively.
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Affiliation(s)
- Liciane Fernandes Medeiros
- Post Graduate Program in Biological Sciences: Physiology, Institute of Basic Health Sciences (ICBS), Universidade Federal do Rio Grande do Sul, 90050-170 Porto Alegre, RS, Brazil
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Morphine exposure in early life increases nociceptive behavior in a rat formalin tonic pain model in adult life. Brain Res 2010; 1367:122-9. [PMID: 20977897 DOI: 10.1016/j.brainres.2010.10.041] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2010] [Revised: 10/11/2010] [Accepted: 10/13/2010] [Indexed: 11/23/2022]
Abstract
Considering the importance of a deeper understanding of the effect throughout life of opioid analgesia at birth, our objective was to determine whether morphine administration in early life, once a day for 7 days in 8-day-old rats, alters the nociceptive response over the short (P16), medium (P30), and long term (P60) and to evaluate which system is involved in the altered nociceptive response. The nociceptive responses were assessed by the formalin test, and the behavior analyzed was the total time spent in biting and flicking of the formalin-injected hindpaw, recorded during the first 5 min (phase I) and from 15-30 min (phase II). The morphine group showed no change in nociceptive response at P16, but at P30 and P60, the nociceptive response was increased in phase I, and in both phases, respectively. At P30 and P60, the animals received a non-steroidal anti-inflammatory drug (indomethacin) or NMDA receptor antagonist (ketamine) 30 min before the formalin test. The increase in the nociceptive response was completely reversed by ketamine, and partially by indomethacin. These results indicate that early morphine exposure causes an increase in the nociceptive response in adult life. It is possible that this lower nociception threshold is due to neuroadaptations in nociceptive circuits, such as the glutamatergic system. Thus, this work demonstrates the importance of evaluating clinical consequences related to early opioid administration and suggests a need for a novel design of agents that may counteract opiate-induced neuroplastic changes.
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Rozisky JR, da Silva RS, Adachi LS, Capiotti KM, Ramos DB, Bogo MR, Bonan CD, Sarkis JJF, Torres ILDS. Neonatal morphine exposure alters E-NTPDase activity and gene expression pattern in spinal cord and cerebral cortex of rats. Eur J Pharmacol 2010; 642:72-6. [PMID: 20553911 DOI: 10.1016/j.ejphar.2010.05.044] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2010] [Revised: 04/25/2010] [Accepted: 05/23/2010] [Indexed: 12/25/2022]
Abstract
The neonate opioid system has been frequently investigated, and studies have shown that exposure to drugs in early life can have implications for nervous system development. It has been proposed that adenosine is involved in opioid antinociception, and ATP is involved in central and peripheral mechanisms of nociception. Extracellular nucleotides can be hydrolyzed by E-NTPDases and ecto-5'nucleotidase, which present the functions of removing ATP and generating adenosine. In this study, we evaluated ATP, ADP, and AMP hydrolysis in synaptosomes from spinal cord and cerebral cortex of rats at postnatal day 16 after repeated morphine exposure in early life (postnatal day 8 to 14). Additionally, we evaluated E-NTPDase (1, 2 and 3) and ecto-5'nucleotidase gene expression by semi-quantitative RT-PCR analysis. We observed an increase in ATP hydrolysis in the cerebral cortex, and a decrease in ADP hydrolysis in spinal cord. Expression levels of E-NTPDase 1 decreased in cerebral cortex and increased in spinal cord. Our findings highlight the importance of the purinergic system in young rats submitted to repeated morphine exposure by showing that in the neonatal period such exposure is capable of affecting the control system for nucleotide levels, which can promote changes in modulation or transmission of painful stimuli.
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Affiliation(s)
- Joanna Ripoll Rozisky
- Laboratório de Farmacologia da Dor e da Inflamação, Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite, 500 sala 202, CEP 90050-170, Porto Alegre, Brazil
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Abstract
This paper is the 31st consecutive installment of the annual review of research concerning the endogenous opioid system. It summarizes papers published during 2008 that studied the behavioral effects of molecular, pharmacological and genetic manipulation of opioid peptides, opioid receptors, opioid agonists and opioid antagonists. The particular topics that continue to be covered include the molecular-biochemical effects and neurochemical localization studies of endogenous opioids and their receptors related to behavior (Section 2), and the roles of these opioid peptides and receptors in pain and analgesia (Section 3); stress and social status (Section 4); tolerance and dependence (Section 5); learning and memory (Section 6); eating and drinking (Section 7); alcohol and drugs of abuse (Section 8); sexual activity and hormones, pregnancy, development and endocrinology (Section 9); mental illness and mood (Section 10); seizures and neurologic disorders (Section 11); electrical-related activity and neurophysiology (Section 12); general activity and locomotion (Section 13); gastrointestinal, renal and hepatic functions (Section 14); cardiovascular responses (Section 15); respiration and thermoregulation (Section 16); and immunological responses (Section 17).
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Affiliation(s)
- Richard J Bodnar
- Department of Psychology and Neuropsychology Doctoral Sub-Program, Queens College, City University of New York, 65-30 Kissena Blvd, Flushing, NY 11367, United States.
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