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Behavioral Voluntary and Social Bioassays Enabling Identification of Complex and Sex-Dependent Pain-(-Related) Phenotypes in Rats with Bone Cancer. Cancers (Basel) 2023; 15:cancers15051565. [PMID: 36900357 PMCID: PMC10000428 DOI: 10.3390/cancers15051565] [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: 12/22/2022] [Revised: 02/06/2023] [Accepted: 02/28/2023] [Indexed: 03/06/2023] Open
Abstract
Cancer-induced bone pain (CIBP) is a common and devastating symptom with limited treatment options in patients, significantly affecting their quality of life. The use of rodent models is the most common approach to uncovering the mechanisms underlying CIBP; however, the translation of results to the clinic may be hindered because the assessment of pain-related behavior is often based exclusively on reflexive-based methods, which are only partially indicative of relevant pain in patients. To improve the accuracy and strength of the preclinical, experimental model of CIBP in rodents, we used a battery of multimodal behavioral tests that were also aimed at identifying rodent-specific behavioral components by using a home-cage monitoring assay (HCM). Rats of all sexes received an injection with either heat-deactivated (sham-group) or potent mammary gland carcinoma Walker 256 cells into the tibia. By integrating multimodal datasets, we assessed pain-related behavioral trajectories of the CIBP-phenotype, including evoked and non-evoked based assays and HCM. Using principal component analysis (PCA), we discovered sex-specific differences in establishing the CIBP-phenotype, which occurred earlier (and differently) in males. Additionally, HCM phenotyping revealed the occurrence of sensory-affective states manifested by mechanical hypersensitivity in sham when housed with a tumor-bearing cagemate (CIBP) of the same sex. This multimodal battery allows for an in-depth characterization of the CIBP-phenotype under social aspects in rats. The detailed, sex-specific, and rat-specific social phenotyping of CIBP enabled by PCA provides the basis for mechanism-driven studies to ensure robustness and generalizability of results and provide information for targeted drug development in the future.
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Salaün JP, Chagnot A, Cachia A, Poirel N, Datin-Dorrière V, Dujarrier C, Lemarchand E, Rolland M, Delalande L, Gressens P, Guillois B, Houdé O, Levard D, Gakuba C, Moyon M, Naveau M, Orliac F, Orliaguet G, Hanouz JL, Agin V, Borst G, Vivien D. Consequences of General Anesthesia in Infancy on Behavior and Brain Structure. Anesth Analg 2023; 136:240-250. [PMID: 36638508 DOI: 10.1213/ane.0000000000006233] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
BACKGROUND One in 7 children will need general anesthesia (GA) before the age of 3. Brain toxicity of anesthetics is controversial. Our objective was to clarify whether exposure of GA to the developing brain could lead to lasting behavioral and structural brain changes. METHODS A first study was performed in mice. The behaviors (fear conditioning, Y-maze, and actimetry) and brain anatomy (high-resolution magnetic resonance imaging) of 6- to 8-week-old Swiss mice exposed or not exposed to GA from 4 to 10 days old were evaluated. A second study was a complementary analysis from the preexisting APprentissages EXécutifs et cerveau chez les enfants d'âge scolaire (APEX) cohort to assess the replicability of our data in humans. The behaviors (behavior rating inventory of executive function, emotional control, and working memory score, Backward Digit Span, and Raven 36) and brain anatomy (high-resolution magnetic resonance imaging) were compared in 102 children 9 to 10 years of age exposed or not exposed to a single GA (surgery) during infancy. RESULTS The animal study revealed chronic exacerbated fear behavior in the adult mice (95% confidence interval [CI], 4-80; P = .03) exposed to postnatal GA; this was associated with an 11% (95% CI, 7.5-14.5) reduction of the periaqueductal gray matter (P = .046). The study in humans suggested lower emotional control (95% CI, 0.33-9.10; P = .06) and a 6.1% (95% CI, 4.3-7.8) reduction in the posterior part of the right inferior frontal gyrus (P = .019) in the children who had been exposed to a single GA procedure. CONCLUSIONS The preclinical and clinical findings of these independent studies suggest lasting effects of early life exposure to anesthetics on later emotional control behaviors and brain structures.
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Affiliation(s)
- Jean-Philippe Salaün
- From the Normandie Universite UNICAEN, INSERM, GIP Cyceron, Institut Blood and Brain @Caen-Normandie, Physiopathology and Imaging of Neurological Disorders, Caen, France.,Department of Anesthesiology and Critical Care Medicine, CHU Caen, Caen University Hospital, Caen, France
| | - Audrey Chagnot
- From the Normandie Universite UNICAEN, INSERM, GIP Cyceron, Institut Blood and Brain @Caen-Normandie, Physiopathology and Imaging of Neurological Disorders, Caen, France
| | - Arnaud Cachia
- Université de Paris, LaPsyDé, CNRS, Paris, France.,Institut Universitaire de France, Paris, France
| | - Nicolas Poirel
- Université de Paris, LaPsyDé, CNRS, Paris, France.,Institut Universitaire de France, Paris, France.,GIP Cyceron, Caen, France
| | - Valérie Datin-Dorrière
- Université de Paris, LaPsyDé, CNRS, Paris, France.,GIP Cyceron, Caen, France.,Department of Neonatology, CHU Caen, Caen University Hospital, Caen, France
| | - Cléo Dujarrier
- From the Normandie Universite UNICAEN, INSERM, GIP Cyceron, Institut Blood and Brain @Caen-Normandie, Physiopathology and Imaging of Neurological Disorders, Caen, France
| | - Eloïse Lemarchand
- From the Normandie Universite UNICAEN, INSERM, GIP Cyceron, Institut Blood and Brain @Caen-Normandie, Physiopathology and Imaging of Neurological Disorders, Caen, France
| | - Marine Rolland
- From the Normandie Universite UNICAEN, INSERM, GIP Cyceron, Institut Blood and Brain @Caen-Normandie, Physiopathology and Imaging of Neurological Disorders, Caen, France.,Department of Anesthesiology and Critical Care Medicine, CHU Caen, Caen University Hospital, Caen, France
| | | | | | | | - Olivier Houdé
- Université de Paris, LaPsyDé, CNRS, Paris, France.,Institut Universitaire de France, Paris, France.,GIP Cyceron, Caen, France
| | - Damien Levard
- From the Normandie Universite UNICAEN, INSERM, GIP Cyceron, Institut Blood and Brain @Caen-Normandie, Physiopathology and Imaging of Neurological Disorders, Caen, France
| | - Clément Gakuba
- From the Normandie Universite UNICAEN, INSERM, GIP Cyceron, Institut Blood and Brain @Caen-Normandie, Physiopathology and Imaging of Neurological Disorders, Caen, France.,Department of Anesthesiology and Critical Care Medicine, CHU Caen, Caen University Hospital, Caen, France
| | - Marine Moyon
- Université de Paris, LaPsyDé, CNRS, Paris, France
| | - Mikael Naveau
- CNRS, GIP Cyceron, Normandie Université, Caen, France
| | - François Orliac
- Université de Paris, LaPsyDé, CNRS, Paris, France.,GIP Cyceron, Caen, France
| | - Gilles Orliaguet
- Department of Pediatric Anesthesia and Intensive Care, Necker-Enfants Malades University Hospital, AP-HP, Centre - Université de Paris, France, Université de Paris, Paris, France
| | - Jean-Luc Hanouz
- Department of Anesthesiology and Critical Care Medicine, CHU Caen, Caen University Hospital, Caen, France.,Caen Normandy University, Unicaen, Caen, France
| | - Véronique Agin
- From the Normandie Universite UNICAEN, INSERM, GIP Cyceron, Institut Blood and Brain @Caen-Normandie, Physiopathology and Imaging of Neurological Disorders, Caen, France
| | - Grégoire Borst
- Université de Paris, LaPsyDé, CNRS, Paris, France.,Institut Universitaire de France, Paris, France
| | - Denis Vivien
- From the Normandie Universite UNICAEN, INSERM, GIP Cyceron, Institut Blood and Brain @Caen-Normandie, Physiopathology and Imaging of Neurological Disorders, Caen, France.,Department of Clinical Research, CHU Caen, Caen University Hospital, Caen, France
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Neonatal Isoflurane Exposure in Rats Impairs Short-Term Memory, Cell Viability, and Glutamate Uptake in Slices of the Frontal Cerebral Cortex, But Not the Hippocampus, in Adulthood. Neurotox Res 2022; 40:1924-1936. [PMID: 36441450 DOI: 10.1007/s12640-022-00607-2] [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: 08/31/2022] [Revised: 11/10/2022] [Accepted: 11/16/2022] [Indexed: 11/29/2022]
Abstract
Neonatal exposure to general anesthetics has been associated with neurotoxicity and morphologic changes in the developing brain. Isoflurane is a volatile anesthetic widely used in pediatric patients to induce general anesthesia, analgesia, and perioperative sedation. In the present study, we investigated the effects of a single neonatal isoflurane (3% in oxygen, 2 h) exposure in rats at postnatal day (PND) 7, in short-term (24 h - PND8) and long-term (adulthood) protocols. In PND8, ex vivo analysis of hippocampal and frontal cortex slices evaluated cell viability and susceptibility to in vitro glutamate challenge. In adult rats, behavioral parameters related to anxiety-like behavior, short-term memory, and locomotor activity (PND60-62) and ex vivo analysis of cell viability, membrane permeability, glutamate uptake, and susceptibility to in vitro glutamate challenge in hippocampal and cortical slices from PND65. A single isoflurane (3%, 2 h) exposure at PND7 did not acutely alter cell viability in cortical and hippocampal slices of infant rats (PND8) per se and did not alter slice susceptibility to in vitro glutamate challenge. In rat's adulthood, behavioral analysis revealed that the neonatal isoflurane exposure did not alter anxiety-like behavior and locomotor activity (open field and rotarod tests). However, isoflurane exposure impaired short-term memory evaluated in the novel object recognition task. Ex vivo analysis of brain slices showed isoflurane neonatal exposure selectively decreased cell viability and glutamate uptake in cortical slices, but it did not alter hippocampal slice viability or glutamate uptake (PND65). Isoflurane exposure did not alter in vitro glutamate-induced neurotoxicity to slices, and isoflurane exposure caused no significant long-term damage to cell membranes in hippocampal or cortical slices. These findings indicate that a single neonatal isoflurane exposure did not promote acute damage; however, it reduced cortical, but not hippocampal, slice viability and glutamate uptake in the adulthood. Additionally, behavioral analysis showed neonatal isoflurane exposure induces short-term recognition memory impairment, consolidating that neonatal exposure to volatile anesthetics may lead to behavioral impairment in the adulthood, although it may damage brain regions differentially.
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Liang L, Fan Z, He D, Zhao Y, Zeng T, Liu B, Ma T, Kang J, Zhang H. Sevoflurane-Induced Neurotoxicity in the Developing Hippocampus via HIPK2/AKT/mTOR Signaling. Neurotox Res 2022; 40:803-813. [PMID: 35460511 DOI: 10.1007/s12640-021-00445-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 11/09/2021] [Indexed: 12/27/2022]
Abstract
Sevoflurane (Sev) is a widely used inhalational anesthetic for general anesthesia in children. Previous studies have confirmed that multiple exposures to inhaled anesthetic can induce long-term neurotoxicity in newborn mice. However, the underlying mechanisms remain elusive. In this study, we investigated the role of homeodomain interacting protein kinase 2 (HIPK2), a stress activating kinase involved in neural survival and synaptic plasticity, and its underlying mechanism in sevoflurane-induced neurotoxicity. Empirical study showed that neuronal apoptosis was elevated after exposure to sevoflurane. Meanwhile, up-regulation of HIPK2 and AKT/mTOR signaling was observed in primary hippocampal neurons and hippocampus in mice upon anesthetic exposure. A64, antagonist of HIPK2, could significantly reduce increased apoptosis and activation of AKT/mTOR induced by sevoflurane. AKT antagonist MK2206 partially alleviated neuronal apoptosis without affecting the expression of HIPK2. Experimental results demonstrated a crucial role of HIPK2/AKT/mTOR signaling in neurotoxicity of sevoflurane. Thus, HIPK2/AKT/mTOR signaling can serve as a potential target for the protection of inhalation anesthesia-induced cytotoxicity in the future.
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Affiliation(s)
- Lirong Liang
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research, Center for Dental Materials and Advanced Manufacture, Department of Anethesiology, School of Stomatology, School of Stomatology, Fourth Military Medical University, Shaanxi, 710032, Xi'an, People's Republic of China
| | - Ze Fan
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research, Center for Dental Materials and Advanced Manufacture, Department of Anethesiology, School of Stomatology, School of Stomatology, Fourth Military Medical University, Shaanxi, 710032, Xi'an, People's Republic of China
| | - Danyi He
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research, Center for Dental Materials and Advanced Manufacture, Department of Anethesiology, School of Stomatology, School of Stomatology, Fourth Military Medical University, Shaanxi, 710032, Xi'an, People's Republic of China
| | - Youyi Zhao
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research, Center for Dental Materials and Advanced Manufacture, Department of Anethesiology, School of Stomatology, School of Stomatology, Fourth Military Medical University, Shaanxi, 710032, Xi'an, People's Republic of China
| | - Tian Zeng
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research, Center for Dental Materials and Advanced Manufacture, Department of Anethesiology, School of Stomatology, School of Stomatology, Fourth Military Medical University, Shaanxi, 710032, Xi'an, People's Republic of China
| | - Bing Liu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research, Center for Dental Materials and Advanced Manufacture, Department of Anethesiology, School of Stomatology, School of Stomatology, Fourth Military Medical University, Shaanxi, 710032, Xi'an, People's Republic of China
| | - Tianyuan Ma
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research, Center for Dental Materials and Advanced Manufacture, Department of Anethesiology, School of Stomatology, School of Stomatology, Fourth Military Medical University, Shaanxi, 710032, Xi'an, People's Republic of China
| | - Junjun Kang
- Department of Neurobiology and Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, Xi'an, Shaanxi, 710032, People's Republic of China
| | - Hui Zhang
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research, Center for Dental Materials and Advanced Manufacture, Department of Anethesiology, School of Stomatology, School of Stomatology, Fourth Military Medical University, Shaanxi, 710032, Xi'an, People's Republic of China.
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Komleva YK, Lopatina OL, Gorina IV, Shuvaev AN, Chernykh A, Potapenko IV, Salmina AB. NLRP3 deficiency-induced hippocampal dysfunction and anxiety-like behavior in mice. Brain Res 2021; 1752:147220. [PMID: 33358726 DOI: 10.1016/j.brainres.2020.147220] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 11/17/2020] [Accepted: 11/25/2020] [Indexed: 01/09/2023]
Abstract
Neuroinflammation has been classified as a trigger of behavioral alterations and cognitive impairments in many neurological conditions, including Alzheimer's disease, major depression, anxiety and others. Regardless of the cause of neuroinflammation, key molecules, which sense neuropathological conditions, are intracellular multiprotein signaling inflammasomes. Increasing evidence shows that the inflammatory response, mediated by activated nucleotide-binding oligomerization domain-, leucine-rich repeat- and pyrin domain-containing 3 (NLRP3) inflammasomes, is associated with the onset and progression of a wide range of diseases of the CNS. However, whether the NLRP3 inflammasome in the CNS is involved in the learning, development of anxiety and adult neurogenesis remains elusive. Therefore, the present study was designed to assess NLRP3 inflammasome contribution in anxiety and reveal its potential involvement in the experimental acquisition of fear responses and hippocampal neurogenesis. Behavioral, immunohistochemical and electrophysiological alterations were measured to evaluate role of neuroinflammation in the limbic system of mice. In this study, we describe interrelated neurophysiological mechanisms, which culminate in absence of NLRP3 inflammasome in young 4 months mice. These include the following: anxious behavior and deterioration in learning and memory of fear conditioning; impairment of adult neurogenesis; reduction and altered morphology of astrocytes in the brain; hyperexcitability in basolateral amygdala (BLA); impaired activation in axons of pyramidal cells of CA1 hippocampal zone in NLRP3 KO mice particularly via the Schaffer collateral pathway; and impaired synaptic transduction in pyramidal cells mediated by an embarrassment of neurotransmitter release from presynaptic site in CA3 hippocampal zone. The present study has demonstrated the novel findings that basal level of NLRP3 inflammasome in the brain of young mice is required for conditioning-induced plasticity in the ventral hippocampus and the basolateral amygdala. The deletion of NLRP3 impair synaptic transduction and caused anxiety-like behavior and labored fear learning, suggesting that low grade inflammation, mediated by NLRP3 expression, play a key role in memory consolidation.
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Affiliation(s)
- Yulia K Komleva
- Depatment of Biochemistry, Medical, Pharmaceutical & Toxicological Chemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia; Research Institute of Molecular Medicine and Pathobiochemistry, Russia.
| | - Olga L Lopatina
- Depatment of Biochemistry, Medical, Pharmaceutical & Toxicological Chemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia; Research Institute of Molecular Medicine and Pathobiochemistry, Russia
| | - Iana V Gorina
- Depatment of Biochemistry, Medical, Pharmaceutical & Toxicological Chemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia
| | - Anton N Shuvaev
- Research Institute of Molecular Medicine and Pathobiochemistry, Russia
| | - Anatoly Chernykh
- Research Institute of Molecular Medicine and Pathobiochemistry, Russia
| | - Ilia V Potapenko
- Depatment of Biochemistry, Medical, Pharmaceutical & Toxicological Chemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia
| | - Alla B Salmina
- Depatment of Biochemistry, Medical, Pharmaceutical & Toxicological Chemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia; Research Institute of Molecular Medicine and Pathobiochemistry, Russia
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Wu L, Zhang K, Sun L, Bai J, Zhang M, Zheng J. Laminin degradation by matrix metalloproteinase 9 promotes ketamine-induced neuronal apoptosis in the early developing rat retina. CNS Neurosci Ther 2020; 26:1058-1068. [PMID: 32562453 PMCID: PMC7539835 DOI: 10.1111/cns.13428] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 05/21/2020] [Accepted: 05/24/2020] [Indexed: 12/15/2022] Open
Abstract
AIMS During early development, laminin degradation contributes to the death of neurons. This study aims to investigate the role and regulation of laminin in ketamine-induced apoptosis. METHODS We performed terminal deoxynucleotidyl transferase biotin-dUTP nick end labeling (TUNEL) and immunohistochemical assays to investigate the roles of the non-integrin laminin receptor, matrix metalloproteinase 9 (MMP9) in ketamine-induced neuronal apoptosis. In situ zymography, Western blot, and immunofluorescence were used to explore the relationships between laminin, MMP9 activity, and Zn2+ . Experiments were performed using whole-mount retinas dissected from Sprague Dawley rats. RESULTS The TUNEL and immunohistochemical assays indicated that ketamine-induced neuronal apoptosis in early developing rat retina. Blockade of non-integrin laminin receptor promoted ketamine-induced apoptosis, while non-integrin laminin receptor activation attenuated ketamine-induced apoptosis. Ketamine-induced laminin degradation, possibly by enhancing the activity of MMP9. MMP9 inhibition reduced ketamine-induced apoptosis by reducing laminin degradation. Downregulation of Zn2+ attenuated the increased MMP9 activity, laminin degradation caused by ketamine and significantly reduced ketamine-induced neuronal apoptosis. CONCLUSION Laminin degradation by MMP9 promoted ketamine-induced neuronal apoptosis in early developing rat retina. The non-integrin laminin receptor may be a pathway involved in ketamine-induced apoptosis. Zn2+ downregulation may play a protective role against ketamine-induced neuronal apoptosis through inhibiting MMP9 activity.
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Affiliation(s)
- Lei Wu
- Department of AnesthesiologyShanghai Children’s Medical Center Affiliated to School of MedicineShanghai Jiao Tong UniversityShanghaiChina
| | - Kan Zhang
- Department of AnesthesiologyShanghai Children’s Medical Center Affiliated to School of MedicineShanghai Jiao Tong UniversityShanghaiChina
| | - Liping Sun
- Department of AnesthesiologyShanghai Children’s Medical Center Affiliated to School of MedicineShanghai Jiao Tong UniversityShanghaiChina
| | - Jie Bai
- Department of AnesthesiologyShanghai Children’s Medical Center Affiliated to School of MedicineShanghai Jiao Tong UniversityShanghaiChina
| | - Mazhong Zhang
- Department of AnesthesiologyShanghai Children’s Medical Center Affiliated to School of MedicineShanghai Jiao Tong UniversityShanghaiChina
| | - Jijian Zheng
- Department of AnesthesiologyShanghai Children’s Medical Center Affiliated to School of MedicineShanghai Jiao Tong UniversityShanghaiChina
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West SE, Lee JC, Johns TN, Nunamaker EA. Intraperitoneal Alfaxalone and Alfaxalone-Dexmedetomidine Anesthesia in Sprague-Dawley Rats ( Rattus norvegicus). JOURNAL OF THE AMERICAN ASSOCIATION FOR LABORATORY ANIMAL SCIENCE 2020; 59:531-538. [PMID: 32758333 DOI: 10.30802/aalas-jaalas-19-000161] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Due to their unpredictability and variable effects, injectable anesthetic regimens in laboratory rodent species warrant refinement. In our study we sought to evaluate alfaxalone, which has gained recent popularity in veterinary medicine, alone and in combination with dexmedetomidine to evaluate their anesthetic ability in Sprague-Dawley rats when administered intraperitoneally. Three doses of alfaxalone only and 4 dose combinations of alfaxalone-dexmedetomidine were tested in males and female rats. The time to induction, anesthetic duration, pulse rate, respiratory rate, temperature, and time to recovery were recorded by a blind observer. The level of anesthesia induced by the various anesthetic protocols was assessed by using pedal withdrawal reflex to a noxious stimulus and scored according to the response. Dependent on the treatment group, atipamezole or saline was administered intraperitoneally once animals reached 60 min of anesthesia. Regardless of the dose, alfaxalone alone achieved only a sedative level of anesthesia, whereas all alfaxalone-dexmedetomidine combinations led to a surgical level of anesthesia in all animals. Anesthesia regimens using alfaxalone alone and in combination with dexmedetomidine demonstrated sex-associated differences, with female rats maintaining longer durations of sedation or anesthesia than their male counterparts. Both male and female rats displayed decreases in physiologic parameters consistent with the effects of dexmedetomidine. Given the results described herein, we recommend 20 mg/kg alfaxalone for sedation and 30 mg/kg alfaxalone combined with 0.05 mg/kg dexmedetomidine for surgical anesthesia in female rats. Appropriate doses of alfaxalone only and alfaxalone-dexmedetomidine for male rats were not determined in this study and need further evaluation.
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Affiliation(s)
- Sylvia E West
- Animal Care Services, University of Florida, Gainesville, Florida;,
| | - Jonathan C Lee
- Animal Care Services, University of Florida, Gainesville, Florida
| | - Tinika N Johns
- Animal Care Services, University of Florida, Gainesville, Florida
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Ho H, Fowle A, Coetzee M, Greger IH, Watson JF. An inhalation anaesthesia approach for neonatal mice allowing streamlined stereotactic injection in the brain. J Neurosci Methods 2020; 342:108824. [PMID: 32569783 PMCID: PMC7369625 DOI: 10.1016/j.jneumeth.2020.108824] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 06/17/2020] [Accepted: 06/18/2020] [Indexed: 12/30/2022]
Abstract
BACKGROUND Investigating brain function requires tools and techniques to visualise, modify and manipulate neuronal tissue. One powerful and popular method is intracerebral injection of customised viruses, allowing expression of exogenous transgenes. This technique is a standard procedure for adult mice, and is used by laboratories worldwide. Use of neonatal animals in scientific research allows investigation of developing tissues and enables long-term study of cell populations. However, procedures on neonatal mice are more challenging, due to the lack of reliable methods and apparatus for anaesthesia of these animals. NEW METHOD Here, we report an inhalation-based protocol for anaesthesia of neonatal (P0-2) mice and present a custom 3D-printed apparatus for maintenance of anaesthesia during surgical procedures. Our optimised method of anaesthesia enables a rapid method of stereotactic injection in neonatal mice for transduction of brain tissue. RESULTS AND COMPARISON WITH EXISTING METHODS This approach significantly enhances animal welfare and facilitates wider and simpler use of neonatal rodents in scientific research. We demonstrate this procedure for targeted labelling of specific brain regions, and in vivo modification of tissue prior to organotypic culture. CONCLUSIONS Our protocol for reliable delivery of inhalational anaesthetics can be readily adopted by any laboratory and will enable safer use of neonatal rodents across a diverse spectrum of scientific disciplines. Application to stereotactic injections allows a rapid and efficient method for modification of brain tissue.
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Affiliation(s)
- Hinze Ho
- MRC Laboratory of Molecular Biology, Cambridge, CB2 0QH, United Kingdom
| | - Adam Fowle
- MRC Laboratory of Molecular Biology, Cambridge, CB2 0QH, United Kingdom
| | - Marisa Coetzee
- MRC Laboratory of Molecular Biology, Cambridge, CB2 0QH, United Kingdom
| | - Ingo H Greger
- MRC Laboratory of Molecular Biology, Cambridge, CB2 0QH, United Kingdom.
| | - Jake F Watson
- MRC Laboratory of Molecular Biology, Cambridge, CB2 0QH, United Kingdom.
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Walters JL, Chelonis JJ, Fogle CM, Ferguson SA, Sarkar S, Paule MG, Talpos JC. Acetyl-l-carnitine does not prevent neurodegeneration in a rodent model of prolonged neonatal anesthesia. Neurotoxicol Teratol 2020; 80:106891. [PMID: 32376384 DOI: 10.1016/j.ntt.2020.106891] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 04/27/2020] [Accepted: 04/29/2020] [Indexed: 12/12/2022]
Abstract
Many studies have shown that prolonged or repeated use of general anesthesia early in life can cause an increase in neurodegeneration and lasting changes in behavior. While short periods of general anesthesia appear to be safe, there is a concern about the neurotoxic potential of prolonged or repeated general anesthesia in young children. Unfortunately, the use of general anesthesia in children cannot be avoided. It would be a great benefit to develop a strategy to reduce or reverse anesthesia mitigated neurotoxicity. The mechanisms behind anesthesia related neurotoxicity are unknown, but evidence suggests that mitochondrial dysfunction and abnormal energy utilization are involved. Recent research suggests that a class of compounds known as carnitines may be effective at preventing anesthesia related neurotoxicity by influencing fatty acid metabolism in the mitochondria. However, it is unknown if carnitines can provide protection against changes in behavior associated with early life exposure to anesthesia. Accordingly, we evaluated the neuroprotective potential of acetyl-l-carnitine in 7-day old rats. Rat pups were exposed to 6 h of general anesthesia with sevoflurane or a control condition, with and without acetyl-l-carnitine. The oxygenation level of animals was continuously monitored during sevoflurane exposure, and any animal showing signs of hypoxia was removed from the study. Animals exposed to sevoflurane showed clear signs of neurodegeneration 2 h after sevoflurane exposure. The hippocampus, cortex, thalamus, and caudate putamen all had elevated levels of Fluoro-Jade C staining. Despite the elevated levels of Fluoro-Jade C, few behavioral changes were observed in an independent cohort of animals treated with sevoflurane. Furthermore, acetyl-l-carnitine had little impact on levels of Fluoro-Jade C staining in animals treated with sevoflurane. These data suggest that acetyl-l-carnitine may offer little protection again anesthesia related neurotoxicity in fully oxygenated animals.
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10
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Maloney SE, Creeley CE, Hartman RE, Yuede CM, Zorumski CF, Jevtovic-Todorovic V, Dikranian K, Noguchi KK, Farber NB, Wozniak DF. Using animal models to evaluate the functional consequences of anesthesia during early neurodevelopment. Neurobiol Learn Mem 2019; 165:106834. [PMID: 29550366 PMCID: PMC6179938 DOI: 10.1016/j.nlm.2018.03.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 02/16/2018] [Accepted: 03/13/2018] [Indexed: 12/15/2022]
Abstract
Fifteen years ago Olney and colleagues began using animal models to evaluate the effects of anesthetic and sedative agents (ASAs) on neurodevelopment. The results from ongoing studies indicate that, under certain conditions, exposure to these drugs during development induces an acute elevated apoptotic neurodegenerative response in the brain and long-term functional impairments. These animal models have played a significant role in bringing attention to the possible adverse effects of exposing the developing brain to ASAs when few concerns had been raised previously in the medical community. The apoptotic degenerative response resulting from neonatal exposure to ASAs has been replicated in many studies in both rodents and non-human primates, suggesting that a similar effect may occur in humans. In both rodents and non-human primates, significantly increased levels of apoptotic degeneration are often associated with functional impairments later in life. However, behavioral deficits following developmental ASA exposure have not been consistently reported even when significantly elevated levels of apoptotic degeneration have been documented in animal models. In the present work, we review this literature and propose a rodent model for assessing potential functional deficits following neonatal ASA exposure with special reference to experimental design and procedural issues. Our intent is to improve test sensitivity and replicability for detecting subtle behavioral effects, and thus enhance the translational significance of ASA models.
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Affiliation(s)
- Susan E Maloney
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, USA; Intellectual and Developmental Disabilities Research Center, Washington University, St. Louis, MO, USA
| | - Catherine E Creeley
- Department of Psychology, The State University of New York at Fredonia, Fredonia, NY 14063, USA
| | - Richard E Hartman
- Department of Psychology, Loma Linda University, 11130 Anderson St., Loma Linda, CA 92354, USA
| | - Carla M Yuede
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, USA; Department of Neurology, Washington University School of Medicine, St. Louis, MO, USA
| | - Charles F Zorumski
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, USA; Taylor Family Institute for Innovative Psychiatric Research, Washington University School of Medicine, St. Louis, MO, USA
| | | | - Krikor Dikranian
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, USA
| | - Kevin K Noguchi
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, USA; Intellectual and Developmental Disabilities Research Center, Washington University, St. Louis, MO, USA
| | - Nuri B Farber
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, USA; Intellectual and Developmental Disabilities Research Center, Washington University, St. Louis, MO, USA
| | - David F Wozniak
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, USA; Taylor Family Institute for Innovative Psychiatric Research, Washington University School of Medicine, St. Louis, MO, USA; Intellectual and Developmental Disabilities Research Center, Washington University, St. Louis, MO, USA.
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Maloney SE, Yuede CM, Creeley CE, Williams SL, Huffman JN, Taylor GT, Noguchi KN, Wozniak DF. Repeated neonatal isoflurane exposures in the mouse induce apoptotic degenerative changes in the brain and relatively mild long-term behavioral deficits. Sci Rep 2019; 9:2779. [PMID: 30808927 PMCID: PMC6391407 DOI: 10.1038/s41598-019-39174-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 01/18/2019] [Indexed: 11/22/2022] Open
Abstract
Epidemiological studies suggest exposures to anesthetic agents and/or sedative drugs (AASDs) in children under three years old, or pregnant women during the third trimester, may adversely affect brain development. Evidence suggests lengthy or repeated AASD exposures are associated with increased risk of neurobehavioral deficits. Animal models have been valuable in determining the type of acute damage in the developing brain induced by AASD exposures, as well as in elucidating long-term functional consequences. Few studies examining very early exposure to AASDs suggest this may be a critical period for inducing long-term functional consequences, but the impact of repeated exposures at these ages has not yet been assessed. To address this, we exposed mouse pups to a prototypical general anesthetic, isoflurane (ISO, 1.5% for 3 hr), at three early postnatal ages (P3, P5 and P7). We quantified the acute neuroapoptotic response to a single versus repeated exposure, and found age- and brain region-specific effects. We also found that repeated early exposures to ISO induced subtle, sex-specific disruptions to activity levels, motor coordination, anxiety-related behavior and social preference. Our findings provide evidence that repeated ISO exposures may induce behavioral disturbances that are subtle in nature following early repeated exposures to a single AASD.
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Affiliation(s)
- Susan E Maloney
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, 63110, USA
- Department of Psychology, University of Missouri - St. Louis, St. Louis, MO, 63121, USA
- Intellectual and Developmental Disabilities Research Center, Washington University, St. Louis, MO, USA
| | - Carla M Yuede
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, 63110, USA
- Department of Neurology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Catherine E Creeley
- Department of Psychology, State University of New York at Fredonia, Fredonia, NY, 14063, USA
| | - Sasha L Williams
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Jacob N Huffman
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - George T Taylor
- Department of Psychology, University of Missouri - St. Louis, St. Louis, MO, 63121, USA
| | - Kevin N Noguchi
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, 63110, USA
- Intellectual and Developmental Disabilities Research Center, Washington University, St. Louis, MO, USA
| | - David F Wozniak
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, 63110, USA.
- Taylor Family Institute for Innovative Psychiatric Research, Washington University School of Medicine, St. Louis, MO, USA.
- Intellectual and Developmental Disabilities Research Center, Washington University, St. Louis, MO, USA.
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12
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Tanaka H, Ehara A, Nakadate K, Yoshimoto K, Shimoda K, Ueda S. Behavioral, hormonal, and neurochemical outcomes of neonatal repeated shaking brain injury in male adult rats. Physiol Behav 2019; 199:118-126. [DOI: 10.1016/j.physbeh.2018.11.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Revised: 11/03/2018] [Accepted: 11/18/2018] [Indexed: 12/18/2022]
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13
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Bajwa NM, Lee JB, Halavi S, Hartman RE, Obenaus A. Repeated isoflurane in adult male mice leads to acute and persistent motor decrements with long-term modifications in corpus callosum microstructural integrity. J Neurosci Res 2018; 97:332-345. [DOI: 10.1002/jnr.24343] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 09/28/2018] [Accepted: 09/28/2018] [Indexed: 12/24/2022]
Affiliation(s)
- Nikita M. Bajwa
- Musculoskeletal Disease Center; VA Loma Linda Healthcare System; Loma Linda California
| | - Jeong B. Lee
- Department of Basic Sciences, School of Medicine; Loma Linda University; Loma Linda California
| | - Shina Halavi
- Department of Psychology, School of Behavioral Health; Loma Linda University; Loma Linda California
| | - Richard E. Hartman
- Department of Psychology, School of Behavioral Health; Loma Linda University; Loma Linda California
| | - Andre Obenaus
- Department of Basic Sciences, School of Medicine; Loma Linda University; Loma Linda California
- Department of Pediatrics, School of Medicine; University of California; Irvine California
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14
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Xu J, Kang E, Mintz CD. Anesthetics disrupt brain development via actions on the mTOR pathway. Commun Integr Biol 2018; 11:1-4. [PMID: 30083288 PMCID: PMC6067894 DOI: 10.1080/19420889.2018.1451719] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Accepted: 03/08/2018] [Indexed: 11/05/2022] Open
Abstract
Experiments conducted in non-human primates have recently provided new evidence supporting a longstanding concern that exposure to general anesthesia during late intrauterine life or early childhood can cause lasting cognitive deficits through harmful effects on brain development. The mammalian target of rapamycin (mTOR) signaling system plays a key role in both normal brain development and in a wide range of developmental disorders that are characterized by cognitive deficits. Intriguingly, our recently published work shows that anesthetics can chronically alter mTOR signaling in the hippocampal dentate gyrus and that normalization of mTOR signaling can prevent anesthesia-induced perturbation of structure and function. In this addendum, we briefly discuss the putative role of mTOR in developmental anesthetic neurotoxicity.
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Affiliation(s)
- Jing Xu
- Department of Anesthesiology, Second Affiliated Hospital of Xi'an Jiaotong University School of Medicine, Xi'an, Shaanxi, China.,Department of Anesthesiology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Eunchai Kang
- Department of Neuroscience and Mahoney Institute for Neurosciences, Perelman School for Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - C David Mintz
- Department of Anesthesiology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
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15
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Gao L, Han J, Bai J, Dong J, Zhang S, Zhang M, Zheng J. Nicotinic Acetylcholine Receptors are Associated with Ketamine-induced Neuronal Apoptosis in the Developing Rat Retina. Neuroscience 2018; 376:1-12. [DOI: 10.1016/j.neuroscience.2018.01.057] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 12/30/2017] [Accepted: 01/29/2018] [Indexed: 12/17/2022]
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16
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Wang C, Han X, Liu F, Patterson TA, Hanig JP, Paule MG, Slikker W. Lipid profiling as an effective approach for identifying biomarkers/adverse events associated with pediatric anesthesia. Toxicol Appl Pharmacol 2018; 354:191-195. [PMID: 29550513 DOI: 10.1016/j.taap.2018.03.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 02/20/2018] [Accepted: 03/12/2018] [Indexed: 12/13/2022]
Abstract
Adverse effects related to central nervous system (CNS) function in pediatric populations may, at times, be difficult, if not impossible to evaluate. Prolonged anesthetic exposure affects brain excitability and anesthesia during the most sensitive developmental stages and has been associated with mitochondrial dysfunction, aberrant lipid metabolism and synaptogenesis, subsequent neuronal damage, as well as long-term behavioral deficits. There has been limited research evaluating whether and how anesthetic agents affect cellular lipids, the most abundant components of the brain other than water. Therefore, this review discusses: (1) whether the observed anesthetic-induced changes in lipid profiles seen in preclinical studies represents early signs of neurotoxicity; (2) the potential mechanisms underlying anesthetic-induced brain injury; and (3) whether lipid biomarker(s) identified in preclinical studies can serve as markers for the early clinical detection of anesthetic-induced neurotoxicity.
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Affiliation(s)
- Cheng Wang
- Division of Neurotoxicology, National Center for Toxicological Research/Food and Drug Administration, Jefferson, AR 72079, USA.
| | - Xianlin Han
- Center for Metabolic Origins of Disease, Sanford Burnham Prebys Medical Discovery Institute at Lake Nona, Orlando, FL 32827, USA
| | - Fang Liu
- Division of Neurotoxicology, National Center for Toxicological Research/Food and Drug Administration, Jefferson, AR 72079, USA
| | - Tucker A Patterson
- National Center for Toxicological Research/Food and Drug Administration, Jefferson, AR 72079, USA
| | - Joseph P Hanig
- Center for Drug Evaluation and Research/Food and Drug Administration, Silver Spring, MD 20993, USA
| | - Merle G Paule
- Division of Neurotoxicology, National Center for Toxicological Research/Food and Drug Administration, Jefferson, AR 72079, USA
| | - William Slikker
- National Center for Toxicological Research/Food and Drug Administration, Jefferson, AR 72079, USA
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