1
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Cogo Pagella J, Rodríguez MF, Frisina F, O Cervino C. Combining melatonin with dexmedetomidine improves anesthesia in rats. Lab Anim 2024:236772231163211. [PMID: 38779993 DOI: 10.1177/00236772231163211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
Melatonin (ML) and dexmedetomidine (DM) are used separately as anesthetic premedication or as an anesthetic in humans and laboratory animals. In this study, we aimed to investigate the anesthetic properties of both drugs combined. The anesthetic effects of several combinations of ML (50 and 100 mg/kg) and DM (50 and 100 μg/kg) were evaluated in rats by observing behavioral manifestations and recording the duration and depth of anesthesia. Five anesthetic intervals were established according to the loss and recovery of reflexes. While each individual drug did not induce an appropriate anesthetic effect at the tested doses, ML50 + DM100, ML100 + DM50 and ML100 + DM100 combinations resulted in surgical anesthesia intervals of 60 to 360 min. Together, our results point that the use of ML allows to decrease the dose of DM, reducing the unwanted anesthetic effects of this α2-agonist.
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Affiliation(s)
- Joaquín Cogo Pagella
- Institute of Basic and Experimental Sciences (IBES, SeCyT-UM), University of Morón, Argentina
| | - María F Rodríguez
- Institute of Basic and Experimental Sciences (IBES, SeCyT-UM), University of Morón, Argentina
| | - Fabricio Frisina
- Institute of Basic and Experimental Sciences (IBES, SeCyT-UM), University of Morón, Argentina
| | - Claudio O Cervino
- Institute of Basic and Experimental Sciences (IBES, SeCyT-UM), University of Morón, Argentina
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2
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Luo D, Chen S, Zhang Y. Effects of different injection methods of propofol anesthesia on the behavior and electroencephalography recording in mice. IBRAIN 2022; 8:109-116. [PMID: 37786422 PMCID: PMC10529194 DOI: 10.1002/ibra.12030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 02/18/2022] [Accepted: 02/20/2022] [Indexed: 10/04/2023]
Abstract
Propofol is commonly used in mice studies on the mechanism of general anesthesia. The administration routes of propofol include intraperitoneal injection, single tail vein injection, and continuous tail vein pumping. The aim of this study is to compare the effects of the three injection methods on the behavior and electroencephalography (EEG) recording in mice. Mice were divided into an intraperitoneal injection group, a single tail vein injection group, and a continuous tail vein pumping group according to the propofol administration route. The indexes for observation were: time of loss of righting reflex (LORR), time of resumption of righting reflex (RORR), and change in the number of EEG spindle waves during anesthesia. The LORR and RORR were detected again after 1 week to determine the repeatability of the three administration routes. Death and behavioral change after anesthesia recovery in mice were recorded in the three groups. For propofol administration in mice, intraperitoneal injection induced long-duration anesthesia, but the depth of anesthesia was shallow and there was a risk of anesthesia accidents. A small dose of propofol administered through a single tail vein can induce loss of consciousness but the LORR time was not recorded, hence the metrics during induction of anesthesia were not investigated. Continuous tail vein pumping produced stable behavior and EEG recording during anesthesia induction and recovery in mice, and the individual difference was small. Continuous tail vein pumping is an ideal administration route for studying the mechanism of loss of consciousness of propofol anesthesia in mice, which could provide reference data for future mice experiments using propofol.
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Affiliation(s)
- Dan Luo
- College of AnesthesiologyZunyi Medical UniversityZunyiGuizhouChina
| | - Shi‐Yu Chen
- College of AnesthesiologyZunyi Medical UniversityZunyiGuizhouChina
| | - Yu Zhang
- Guizhou Key Laboratory of Anesthesia and Organ ProtectionZunyi Medical UniversityZunyiGuizhouChina
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3
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O'Brien C, Vemireddy R, Mohammed U, Barker DJ. Stress reveals a specific behavioral phenotype for opioid abuse susceptibility. J Exp Anal Behav 2022; 117:518-531. [PMID: 35119105 PMCID: PMC9090955 DOI: 10.1002/jeab.738] [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: 10/08/2021] [Revised: 12/22/2021] [Accepted: 01/06/2022] [Indexed: 11/07/2022]
Abstract
Susceptibility to stress has long been considered important for the development of substance use disorders. Nonetheless, behavioral and physiological responses to stress are highly variable, making it difficult to identify the individuals who are most likely to abuse drugs. In the present study, we employed a comprehensive battery of tests for negative valence behaviors and nociception to identify individuals predisposed to opioid seeking following oral opioid self-administration. Furthermore, we examined how this profile was affected by a history of stress. We observed that mice receiving foot shock stress failed to exhibit a preference for sucrose, showed increased immobility in the forced swim task, and exhibited mechanical hypersensitivity when compared to controls. When considering these behaviors in light of future fentanyl-seeking responses, we observed that heightened mechanical sensitivity corresponded to higher opioid preference in mice with a history of stress, but not controls. Moreover, we were surprised to discover that paradoxically high sucrose preferences predicted fentanyl preference in shock mice, while signs of anhedonia predicted fentanyl preference in controls. Taken together, these results indicate that stress can act as a physiological modulator, shifting profiles of opioid abuse susceptibility depending on an individual's history.
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Affiliation(s)
- Chris O'Brien
- Department of Psychology, Rutgers The State University of New Jersey, Piscataway, NJ
| | - Roshni Vemireddy
- Department of Psychology, Rutgers The State University of New Jersey, Piscataway, NJ
| | - Uzma Mohammed
- Department of Psychology, Rutgers The State University of New Jersey, Piscataway, NJ
| | - David J Barker
- Department of Psychology, Rutgers The State University of New Jersey, Piscataway, NJ.,Brain Health Institute, Rutgers University, Piscataway, NJ
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4
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Navarro KL, Huss M, Smith JC, Sharp P, Marx JO, Pacharinsak C. Mouse Anesthesia: The Art and Science. ILAR J 2021; 62:238-273. [PMID: 34180990 PMCID: PMC9236661 DOI: 10.1093/ilar/ilab016] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 02/04/2021] [Accepted: 12/01/2020] [Indexed: 12/15/2022] Open
Abstract
There is an art and science to performing mouse anesthesia, which is a significant component to animal research. Frequently, anesthesia is one vital step of many over the course of a research project spanning weeks, months, or beyond. It is critical to perform anesthesia according to the approved research protocol using appropriately handled and administered pharmaceutical-grade compounds whenever possible. Sufficient documentation of the anesthetic event and procedure should also be performed to meet the legal, ethical, and research reproducibility obligations. However, this regulatory and documentation process may lead to the use of a few possibly oversimplified anesthetic protocols used for mouse procedures and anesthesia. Although a frequently used anesthetic protocol may work perfectly for each mouse anesthetized, sometimes unexpected complications will arise, and quick adjustments to the anesthetic depth and support provided will be required. As an old saying goes, anesthesia is 99% boredom and 1% sheer terror. The purpose of this review article is to discuss the science of mouse anesthesia together with the art of applying these anesthetic techniques to provide readers with the knowledge needed for successful anesthetic procedures. The authors include experiences in mouse inhalant and injectable anesthesia, peri-anesthetic monitoring, specific procedures, and treating common complications. This article utilizes key points for easy access of important messages and authors’ recommendation based on the authors’ clinical experiences.
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Affiliation(s)
- Kaela L Navarro
- Department of Comparative Medicine, Stanford University, Stanford, California, USA
| | - Monika Huss
- Department of Comparative Medicine, Stanford University, Stanford, California, USA
| | - Jennifer C Smith
- Bioresources Department, Henry Ford Health System, Detroit, Michigan, USA
| | - Patrick Sharp
- Office of Research and Economic Development, University of California, Merced, California, USA
- Animal Resources Authority, Murdoch, Australia
- School of Veterinary and Life Sciences, Murdoch University, Murdoch, Western Australia, Australia
| | - James O Marx
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Cholawat Pacharinsak
- Corresponding Author: Cholawat Pacharinsak, DVM, PhD, DACVAA, Stanford University, Department of Comparative Medicine, 287 Campus Drive, Stanford, CA 94305-5410, USA. E-mail:
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5
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Chang H, Li S, Li Y, Hu H, Cheng B, Miao J, Gao H, Ma H, Gao Y, Wang Q. Effect of sedation with dexmedetomidine or propofol on gastrointestinal motility in lipopolysaccharide-induced endotoxemic mice. BMC Anesthesiol 2020; 20:227. [PMID: 32894042 PMCID: PMC7487735 DOI: 10.1186/s12871-020-01146-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 09/02/2020] [Indexed: 12/18/2022] Open
Abstract
Background Sepsis often accompanies gastrointestinal motility disorder that contributes to the development of sepsis in turn. Propofol and dexmedetomidine, as widely used sedatives in patients with sepsis, are likely to depress gastrointestinal peristalsis. We queried whether propofol or dexmedetomidine, at sedative doses, aggravated sepsis-induced ileus. Methods Sedative/Anesthetic Scores and vital signs of lipopolysaccharide (LPS)-induced endotoxemic mice were measured during sedation with propofol or dexmedetomidine. Endotoxemic mice were divided into 10% fat emulsion, propofol, saline, and dexmedetomidine group. The gastric emptying, small intestinal transit, tests of colonic motility, gastrointestinal transit and whole gut transit were evaluated at 15 mins and 24 h after intraperitoneal injection of sedatives/vehicles respectively. Results 40 mg·kg− 1propofol and 80 μg·kg− 1 dexmedetomidine induced a similar depth of sedation with comparable vital signs except that dexmedetomidine strikingly decreased heart rate in endotoxemic mice. Dexmedetomidine markedly inhibited gastric emptying (P = 0.006), small intestinal transit (P = 0.006), colonic transit (P = 0.0006), gastrointestinal transit (P = 0.0001) and the whole gut transit (P = 0.034) compared with the vehicle, whereas propofol showed no depression on all parts of gastrointestinal motility 15 mins after administration. The inhibitive effects of dexmedetomidine in these tests vanished 24 h after the administration. Conclusions Deep sedation with dexmedetomidine, but not propofol, significantly inhibited gastrointestinal peristalsis in endotoxemic mice while the inhibitory effect disappeared 24 h after sedation. These data suggested that both propofol and dexmedetomidine could be applied in septic patients while dexmedetomidine should be used cautiously in patients with cardiac disease or ileus.
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Affiliation(s)
- Haiqing Chang
- Department of Anesthesiology & Center for Brain Science, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Shuang Li
- Department of Anesthesiology & Center for Brain Science, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Yansong Li
- Department of Anesthesiology & Center for Brain Science, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Hao Hu
- Department of Pharmacology, School of Basic Medical Sciences, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Bo Cheng
- Department of Anesthesiology & Center for Brain Science, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Jiwen Miao
- Department of Anesthesiology & Center for Brain Science, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Hui Gao
- Department of Anesthesiology & Center for Brain Science, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Hongli Ma
- Department of Anesthesiology & Center for Brain Science, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Yanfeng Gao
- Department of Anesthesiology & Center for Brain Science, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China.
| | - Qiang Wang
- Department of Anesthesiology & Center for Brain Science, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China.
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6
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Yang L, Ton H, Zhao R, Geron E, Li M, Dong Y, Zhang Y, Yu B, Yang G, Xie Z. Sevoflurane induces neuronal activation and behavioral hyperactivity in young mice. Sci Rep 2020; 10:11226. [PMID: 32641746 PMCID: PMC7343864 DOI: 10.1038/s41598-020-66959-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Accepted: 05/28/2020] [Indexed: 12/25/2022] Open
Abstract
Sevoflurane, a commonly used anesthetic, may cause agitation in patients. However, the mechanism underlying this clinical observation remains largely unknown. We thus assessed the effects of sevoflurane on neuronal activation and behaviors in mice. Ten-day-old mice received 2% sevoflurane, 1% isoflurane, or 6% desflurane for 10 minutes. The behavioral activities were recorded and evaluated at one minute after the loss of righting reflex in the mice, which was about two minutes after the anesthetic administration. The neuronal activation was evaluated by c-Fos expression and calcium imaging at one minute after the anesthetic administration. Propofol, which reduces neuronal activation, was used to determine the cause-and-effect of sevoflurane. We found that sevoflurane caused an increase in neuronal activation in primary somatosensory cortex of young mice and behavioral hyperactivity in the mice at one minute after the loss of righting reflex. Desflurane did not induce behavioral hyperactivity and isoflurane only caused behavioral hyperactivity with borderline significance. Finally, propofol attenuated the sevoflurane-induced increase in neuronal activation and behavioral hyperactivity in young mice. These results demonstrate an unexpected sevoflurane-induced increase in neuronal activation and behavioral hyperactivity in young mice. These findings suggest the potential mechanisms underlying the sevoflurane-induced agitation and will promote future studies to further determine whether anesthetics can induce behavioral hyperactivity via increasing neuronal activation.
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Affiliation(s)
- Lei Yang
- Department of Anesthesiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 200025, Shanghai, P. R. China.,Department of Anesthesia, Critical Care and Pain Medicine; Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, 02129-2060, USA
| | - Hoai Ton
- Department of Anesthesia, Critical Care and Pain Medicine; Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, 02129-2060, USA
| | - Ruohe Zhao
- Skirball Institute, Department of Neuroscience and Physiology, New York University School of Medicine, New York, NY, 10016, USA
| | - Erez Geron
- Skirball Institute, Department of Neuroscience and Physiology, New York University School of Medicine, New York, NY, 10016, USA
| | - Mengzhu Li
- Department of Anesthesia, Critical Care and Pain Medicine; Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, 02129-2060, USA.,Department of Anesthesiology, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, P. R. China
| | - Yuanlin Dong
- Department of Anesthesia, Critical Care and Pain Medicine; Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, 02129-2060, USA
| | - Yiying Zhang
- Department of Anesthesia, Critical Care and Pain Medicine; Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, 02129-2060, USA
| | - Buwei Yu
- Department of Anesthesiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 200025, Shanghai, P. R. China
| | - Guang Yang
- Department of Anesthesiology, Columbia University Irving Medical Center, New York, NY, 10032, USA.
| | - Zhongcong Xie
- Department of Anesthesia, Critical Care and Pain Medicine; Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, 02129-2060, USA.
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7
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Maternal exposure to volatile anesthetics induces IL-6 in fetal brains and affects neuronal development. Eur J Pharmacol 2019; 863:172682. [DOI: 10.1016/j.ejphar.2019.172682] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 09/10/2019] [Accepted: 09/19/2019] [Indexed: 11/19/2022]
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8
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Predosing Chemical Stability of Admixtures of Propofol, Ketamine, Fentanyl, and Remifentanil. Anesth Analg 2019; 129:e13-e15. [DOI: 10.1213/ane.0000000000003772] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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9
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Liang C, Du F, Wang J, Cang J, Xue Z. Propofol Regulates Neural Stem Cell Proliferation and Differentiation via Calmodulin-Dependent Protein Kinase II/AMPK/ATF5 Signaling Axis. Anesth Analg 2018; 129:608-617. [PMID: 30303867 DOI: 10.1213/ane.0000000000003844] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
BACKGROUND Propofol can cause degeneration of developing brain cells and subsequent long-term learning or memory impairment. However, at the early stage of embryonic development, the molecular mechanism of propofol-induced inhibition in neural stem cells (NSCs) neurogenesis is still unclear. The aim of this study was to determine the role of propofol in NSCs neurogenesis and, more importantly, to explore the underlying mechanism. METHODS First, a single intraperitoneal injection of propofol was performed in pregnant mice, and 6 hours after administration of propofol, the hippocampus RNA and the protein of the embryos' brains was extracted to analyze the expression of neuron-specific markers. Second, the primary NSCs were isolated from the hippocampus of mouse embryonic brain and then treated with propofol for cell viability, immunostaining, and transwell assays; more importantly, we performed RNA sequencing (RNA-seq) and q-reverse transcription polymerase chain reaction assays to identify genes regulated by propofol; the Western blot, small interfering RNA (SiRNA), and luciferase reporter assays were used to study the effects of propofol on calmodulin-dependent protein kinase (CaMk) II/5' adenosine monophosphate-activated protein kinase (AMPK)/activating transcription factor 5 (ATF5) signaling pathway. RESULTS Our results indicated that propofol treatment could inhibit the proliferation, migration, and differentiation of NSCs. The results of RNA-seq assays showed that propofol treatment resulted in downregulation of a group of Ca-dependent genes. The following mechanism studies showed that propofol regulates the proliferation, differentiation, and migration of NSCs through the CaMkII/phosphorylation of serine at amino acid position 485 (pS485)/AMPK/ATF5 signaling pathway. CONCLUSIONS The results from study demonstrated that propofol inhibits the proliferation, differentiation, and migration of NSCs, and these effects are partially mediated by CaMkII/pS485/AMPK/ATF5 signaling pathway.
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Affiliation(s)
- Chao Liang
- From the Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
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10
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Abstract
SummaryPropofol is a intravenous anaesthetic most commonly used in ultrasound oocyte retrieval. We studied if the use of propofol had an effect on mouse oocyte maturation, pregnancy, childbirth and progeny and investigated the correlation between propofol side effects and reproductive performance in mice. There was no statistical difference in mating, pregnancy, childbirth, litter size, the number of stillbirths and survival between each group (P>0.05). Propofol also had no effect on polar body extrusion in oocyte maturation as well as on pronucleus formation and, subsequently, early embryo development (P>0.05). An increased concentration of propofol had no effect on this result, although propofol at more than 0.01 mg/ml reduced polar body extrusion. Different concentrations of propofol had no effect on oocyte culture in vitro, pronucleus formation and early embryo development.
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11
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Johnson M, Crowley P, Foley A, Xue C, Connolly C, Gallagher H, Buggy D. Effect of perioperative lidocaine on metastasis after sevoflurane or ketamine-xylazine anaesthesia for breast tumour resection in a murine model. Br J Anaesth 2018; 121:76-85. [DOI: 10.1016/j.bja.2017.12.043] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 12/05/2017] [Accepted: 01/17/2018] [Indexed: 11/16/2022] Open
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12
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Arenillas M, Gomez de Segura IA. Anaesthetic effects of alfaxalone administered intraperitoneally alone or combined with dexmedetomidine and fentanyl in the rat. Lab Anim 2018; 52:588-598. [PMID: 29580166 DOI: 10.1177/0023677218764214] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Alfaxalone is a neuroactive steroid used as a general anaesthetic in several species including dogs, cats, rabbits and ferrets. It has a wide margin of safety and a similar anaesthetic profile to propofol. To increase its aqueous solubility, a new formulation with cyclodextrins has been marketed recently. The objective of this study was to evaluate the anaesthetic effect of several doses of alfaxalone alone, considering differences between sexes, and alfaxalone combined with dexmedetomidine and fentanyl in the rat administered by the intraperitoneal route. A total of 40 Sprague Dawley rats, involved in three studies, were used. Firstly, 25, 35 and 45 mg kg-1 of alfaxalone alone were tested. In a second study, alfaxalone (25 mg kg-1, females; 75 mg kg-1, males) was combined with dexmedetomidine (0.05 mg kg-1). Finally, alfaxalone (20 mg kg-1, females; 60 mg kg-1, males) was combined with dexmedetomidine (0.05 mg kg-1) and fentanyl (0.1 mg kg-1). Times of onset and duration of anaesthesia, and analgesia, deemed as losing of withdrawal pedal reflex, were recorded. Alfaxalone alone produced a 2 - to 3-fold longer time of anaesthesia in females, although surgical anaesthesia was not achieved in either sex. The addition of dexmedetomidine and fentanyl to alfaxalone produced a similar time of analgesia as well as increased time of anaesthesia in both sexes. In conclusion, alfaxalone produces light anaesthesia in rats, and males required a higher dose. The combination with other sedatives or analgesics, such as dexmedetomidine or fentanyl, allows a more prolonged anaesthesia with analgesic effects, potentially suitable for invasive procedures.
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Affiliation(s)
- Mario Arenillas
- Department of Animal Medicine and Surgery, Complutense University of Madrid, Spain
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13
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Ochiai Y, Baba A, Hiramatsu M, Toyota N, Watanabe T, Yamashita K, Yokota H, Iwano H. Blood biochemistry and hematological changes in rats after administration of a mixture of three anesthetic agents. J Vet Med Sci 2017; 80:387-394. [PMID: 29249748 PMCID: PMC5836782 DOI: 10.1292/jvms.17-0497] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Currently, given the concerns regarding animal welfare, it is required that anesthesia or
analgesia be used during surgery in experimental animals. Therefore, it is important to
understand how anesthesia affects the health conditions of experimental animals. In this
study, rat blood biochemistry and hematological changes were examined following
administration of a mixture of three anesthetic agents—medetomidine, midazolam and
butorphanol (MMB). One of three MMB dose combinations was subcutaneously administered to
rats. After 1 hr, rats were treated with atipamezole, to reverse the anesthetic effects.
Blood biochemistry and hematological parameters were assessed at 1, 4 and 24 hr post-MMB
treatment. We also recorded body weight and food intake at 0, 2, 4, 6 and 24 hr post-MMB
administration. Following MMB administration, transient increases were observed in glucose
(GLUC) levels, hematocrit (HCT) values and hemoglobin (HGB) levels, whereas transient
decreases were observed in total protein (TP) content and white blood cell (WBC) counts.
Most of these parameters returned to control values 24 hr following MMB administration.
Additionally, body weight and food intake decreased in MMB-treated rats. In conclusion,
intermediate and high doses of MMB changed some blood biochemistry and hematological
parameters, body weight and food intake. In contrast, low-dose MMB did not cause these
effects. Therefore, depending on the experimental design, MMB may influence the results of
studies that use laboratory animals. Consequently, anesthetic agents used in laboratory
animals should be chosen based on detailed knowledge of their pharmacological effects.
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Affiliation(s)
- Yuichiro Ochiai
- Chugai Research Institute for Medical Science, Inc., 1-135 Komakado, Gotemba, Shizuoka 421-8513, Japan.,Laboratory of Veterinary Biochemistry, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido 069-8501, Japan
| | - Atushi Baba
- Chugai Research Institute for Medical Science, Inc., 1-135 Komakado, Gotemba, Shizuoka 421-8513, Japan
| | - Mio Hiramatsu
- Chugai Research Institute for Medical Science, Inc., 1-135 Komakado, Gotemba, Shizuoka 421-8513, Japan
| | - Naoto Toyota
- Chugai Research Institute for Medical Science, Inc., 1-135 Komakado, Gotemba, Shizuoka 421-8513, Japan
| | - Toshihiko Watanabe
- Chugai Pharmaceutical Co., Ltd., 1-135 Komakado, Gotemba, Shizuoka 421-8513, Japan
| | - Kazuto Yamashita
- Department of Small Animal Clinical Sciences, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido 069-8501, Japan
| | - Hiroshi Yokota
- Laboratory of Veterinary Biochemistry, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido 069-8501, Japan
| | - Hidetomo Iwano
- Laboratory of Veterinary Biochemistry, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido 069-8501, Japan
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14
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Whitehead RA, Schwarz SKW, Asiri YI, Fung T, Puil E, MacLeod BA. The Efficacy and Safety of the Novel Peripheral Analgesic Isovaline as an Adjuvant to Propofol for General Anesthesia and Conscious Sedation: A Proof-of-Principle Study in Mice. Anesth Analg 2016; 121:1481-7. [PMID: 26579656 DOI: 10.1213/ane.0000000000000996] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND The combination of propofol and an opioid analgesic is widely used for procedural sedation, as well as total IV anesthesia. However, opioids produce respiratory depression, a primary cause of death due to these agents. We recently reported on the antinociceptive actions of isovaline, a small nonbiogenic amino acid that does not readily cross the blood-brain barrier and acts on peripheral γ-aminobutyric acid type B receptors. Here, we explored the possibility that isovaline may be an effective and safe alternative to opioids as an adjunct to propofol for producing anesthesia. METHODS With approval from our Animal Care Committee, we conducted an in vivo study in adult female CD-1 mice using Dixon's "up-and-down" method for dose assessment. Animals received intraperitoneal saline, propofol, isovaline, fentanyl, or coadministration of propofol with isovaline or fentanyl. We assessed hypnosis by a loss of righting reflex and immobility by an absence of motor response to tail clip application. General anesthesia was defined as the presence of both hypnosis and immobility. We assessed conscious sedation as a decrease in time on a rotarod. The maximal dose without respiratory rates of <4 per minute, apnea, or death was defined as the maximal tolerated dose. RESULTS Either isovaline or fentanyl coadministered with propofol at its half-maximal effective dose (ED50) for hypnosis produced general anesthesia (isovaline ED50, 96 mg/kg [95% confidence interval {CI}, 88-124 mg/kg]; fentanyl ED50, 0.12 mg/kg [95% CI, 0.08-3.5 mg/kg]). Propofol produced hypnosis (ED50, 124 mg/kg [95% CI, 84-3520 mg/kg]) but did not block responses to tail clip application. Neither isovaline nor fentanyl produced hypnosis at doses which produced immobility (isovaline ED50, 350 mg/kg [95% CI, 286-1120 mg/kg]; fentanyl ED50, 0.35 mg/kg [95% CI, 0.23-0.51 mg/kg]). Isovaline at its analgesic ED50, coadministered with a subhypnotic dose of propofol (40 mg/kg), did not exacerbate propofol-induced deficits in rotarod performance. The median maximal tolerated dose of fentanyl coadministered with the hypnotic ED50 of propofol was 11 mg/kg (95% CI, 8-18 mg/kg). Isovaline at a maximal deliverable (soluble) dose of 5000 mg/kg produced no apparent respiratory depression or other adverse effects. CONCLUSIONS The novel analgesic, isovaline, coadministered with propofol, produced general anesthesia and conscious sedation in mice. The margin of safety for propofol-isovaline was considerably higher than that for propofol-fentanyl. This study's results show that propofol-based sedation and general anesthesia can be effectively and safely produced by replacing the conventional opioid component with a brain-impermeant peripherally acting γ-aminobutyric acid type B receptor agonist. The results provide proof of the principle of combining a peripheral analgesic with a centrally acting hypnotic to produce general anesthesia. This principle suggests a novel approach to clinical general anesthesia and conscious sedation.
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Affiliation(s)
- Ryan A Whitehead
- From the *Department of Anesthesiology, Pharmacology & Therapeutics, The University of British Columbia, Vancouver, British Columbia, Canada; and †Department of Anesthesia, St. Paul's Hospital, Vancouver, British Columbia, Canada
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Ochiai Y, Iwano H, Sakamoto T, Hirabayashi M, Kaneko E, Watanabe T, Yamashita K, Yokota H. Blood biochemical changes in mice after administration of a mixture of three anesthetic agents. J Vet Med Sci 2016; 78:951-6. [PMID: 26902544 PMCID: PMC4937154 DOI: 10.1292/jvms.15-0474] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Currently, from the viewpoint of animal welfare, anesthesia or analgesia is required during experimental
procedures in animals that are likely to cause pain. A part of these anesthetics have been reported to
influence a blood biochemical level. It is important for us to understand the effect of the anesthetic on
blood biochemistry when we choose the anesthetic agent to be used in experiments. In this study, we examined
the blood biochemical changes in mice after administration of a new mixture of three anesthetic agents
−medetomidine / midazolam / butorphanol (MMB). We subcutaneously administered two dose combinations of MMB
(0.45 / 6 / 7.5 and 0.9 / 12 / 15 mg/kg) in mice, followed by administration of atipamezole, for reversal of
anesthetic effects, after 1 hr. Thereafter, blood biochemistry was assessed at 1, 4 and 24 hr after MMB
administration. We observed that MMB administration caused a transient increase in blood sugar, inorganic
phosphorus, potassium and creatine kinase levels. These, however, returned to the reference range 24 hr after
MMB administration. In conclusion, MMB changes the levels of some blood biochemical parameters, but not to an
extent that would threaten health. However, when using laboratory animals, this effect of MMB may influence
the experimental results, depending on the experimental content. Hence, the choice of anesthetic agents used
in laboratory animals should be based on detailed knowledge of their pharmacological effects.
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Affiliation(s)
- Yuichiro Ochiai
- Chugai Research Institute for Medical Science, Inc., 1-135 Komakado, Gotemba, Shizuoka 421-8513, Japan
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Valentim AM, Félix LM, Carvalho L, Diniz E, Antunes LM. A New Anaesthetic Protocol for Adult Zebrafish (Danio rerio): Propofol Combined with Lidocaine. PLoS One 2016; 11:e0147747. [PMID: 26808508 PMCID: PMC4725851 DOI: 10.1371/journal.pone.0147747] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 01/07/2016] [Indexed: 02/06/2023] Open
Abstract
Background The increasing use of zebrafish model has not been accompanied by the evolution of proper anaesthesia for this species in research. The most used anaesthetic in fishes, MS222, may induce aversion, reduction of heart rate, and consequently high mortality, especially during long exposures. Therefore, we aim to explore new anaesthetic protocols to be used in zebrafish by studying the quality of anaesthesia and recovery induced by different concentrations of propofol alone and in combination with different concentrations of lidocaine. Material and Methods In experiment A, eighty-three AB zebrafish were randomly assigned to 7 different groups: control, 2.5 (2.5P), 5 (5P) or 7.5 μg/ml (7.5P) of propofol; and 2.5 μg/ml of propofol combined with 50, (P/50L), 100 (P/100L) or 150 μg/ml (P/150L) of lidocaine. Zebrafish were placed in an anaesthetic water bath and time to lose the equilibrium, reflex to touch, reflex to a tail pinch, and respiratory rate were measured. Time to gain equilibrium was also assessed in a clean tank. Five and 24 hours after anaesthesia recovery, zebrafish were evaluated concerning activity and reactivity. Afterwards, in a second phase of experiments (experiment B), the best protocol of the experiment A was compared with a new group of 8 fishes treated with 100 mg/L of MS222 (100M). Results In experiment A, only different concentrations of propofol/lidocaine combination induced full anaesthesia in all animals. Thus only these groups were compared with a standard dose of MS222 in experiment B. Propofol/lidocaine induced a quicker loss of equilibrium, and loss of response to light and painful stimuli compared with MS222. However zebrafish treated with MS222 recovered quickly than the ones treated with propofol/lidocaine. Conclusion In conclusion, propofol/lidocaine combination and MS222 have advantages in different situations. MS222 is ideal for minor procedures when a quick recovery is important, while propofol/lidocaine is best to induce a quick and complete anaesthesia.
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Affiliation(s)
- Ana M. Valentim
- Laboratory Animal Science Group, Instituto de Biologia Molecular e Celular (IBMC), Universidade do Porto, Porto, Portugal
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- Centro de Investigação e Tecnologias Agroambientais e Biológicas (CITAB), Universidade de Trás-os-Montes e Alto Douro, Vila Real, Portugal
- * E-mail:
| | - Luís M. Félix
- Laboratory Animal Science Group, Instituto de Biologia Molecular e Celular (IBMC), Universidade do Porto, Porto, Portugal
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- Centro de Investigação e Tecnologias Agroambientais e Biológicas (CITAB), Universidade de Trás-os-Montes e Alto Douro, Vila Real, Portugal
| | - Leonor Carvalho
- Centro de Investigação e Tecnologias Agroambientais e Biológicas (CITAB), Universidade de Trás-os-Montes e Alto Douro, Vila Real, Portugal
| | - Enoque Diniz
- Centro de Investigação e Tecnologias Agroambientais e Biológicas (CITAB), Universidade de Trás-os-Montes e Alto Douro, Vila Real, Portugal
- Departamento de Sanidade Animal (DSA), Faculdade e Medicina Veterinária (FMV), Universidade José Eduardo dos Santos (UJES), Huambo, Angola
| | - Luís M. Antunes
- Laboratory Animal Science Group, Instituto de Biologia Molecular e Celular (IBMC), Universidade do Porto, Porto, Portugal
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- Centro de Investigação e Tecnologias Agroambientais e Biológicas (CITAB), Universidade de Trás-os-Montes e Alto Douro, Vila Real, Portugal
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McFadden MS, Bennett RA, Reavill DR, Ragetly GR, Clark-Price SC. Clinical and histologic effects of intracardiac administration of propofol for induction of anesthesia in ball pythons (Python regius). J Am Vet Med Assoc 2012; 239:803-7. [PMID: 21916763 DOI: 10.2460/javma.239.6.803] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To assess the clinical differences between induction of anesthesia in ball pythons with intracardiac administration of propofol and induction with isoflurane in oxygen and to assess the histologic findings over time in hearts following intracardiac administration of propofol. DESIGN Prospective randomized study. ANIMALS 30 hatchling ball pythons (Python regius). PROCEDURES Anesthesia was induced with intracardiac administration of propofol (10 mg/kg [4.5 mg/lb]) in 18 ball pythons and with 5% isoflurane in oxygen in 12 ball pythons. Induction time, time of anesthesia, and recovery time were recorded. Hearts from snakes receiving intracardiac administration of propofol were evaluated histologically 3, 7, 14, 30, and 60 days following propofol administration. RESULTS Induction time with intracardiac administration of propofol was significantly shorter than induction time with 5% isoflurane in oxygen. No significant differences were found in total anesthesia time. Recovery following intracardiac administration of propofol was significantly longer than recovery following induction of anesthesia with isoflurane in oxygen. Heart tissue evaluated histologically at 3, 7, and 14 days following intracardiac administration of propofol had mild inflammatory changes, and no histopathologic lesions were seen 30 and 60 days following propofol administration. CONCLUSIONS AND CLINICAL RELEVANCE Intracardiac injection of propofol in snakes is safe and provides a rapid induction of anesthesia but leads to prolonged recovery, compared with that following induction with isoflurane. Histopathologic lesions in heart tissues following intracardiac injection of propofol were mild and resolved after 14 days.
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Affiliation(s)
- Michael S McFadden
- Veterinary Teaching Hospital, Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois, Urbana, IL 61802, USA.
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Cesarovic N, Nicholls F, Rettich A, Kronen P, Hässig M, Jirkof P, Arras M. Isoflurane and sevoflurane provide equally effective anaesthesia in laboratory mice. Lab Anim 2010; 44:329-36. [PMID: 20507878 DOI: 10.1258/la.2010.009085] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Isoflurane is currently the most common volatile anaesthetic used in laboratory mice, whereas in human medicine the more modern sevoflurane is often used for inhalation anaesthesia. This study aimed to characterize and compare the clinical properties of both anaesthetics for inhalation anaesthesia in mice. In an approach mirroring routine laboratory conditions (spontaneous breathing, gas supply via nose mask, preventing hypothermia by a warming mat) a 50 min anaesthesia was performed. Anaesthetics were administered in oxygen as carrier gas at standardized dosages of 1.5 minimum alveolar concentrations, which was 2.8% for isoflurane and 4.9% for sevoflurane. Both induction and recovery from anaesthesia proceeded quickly, within 1-2 min. During anaesthesia, all reflex testing was negative and no serious impairment of vital functions was found; all animals survived. The most prominent side-effect during anaesthesia was respiratory depression with hypercapnia, acidosis and a marked decrease in respiration rate. Under anaesthesia, heart rate and core body temperature remained within the normal range, but were significantly increased for 12 h after anaesthesia. Locomotor activity, daily food and water consumption and body weight progression showed no abnormalities after anaesthesia. No significant difference was found between the two anaesthetics. In conclusion, isoflurane and sevoflurane provided an equally reliable anaesthesia in laboratory mice.
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Affiliation(s)
- Nikola Cesarovic
- Institute of Laboratory Animal Science, University of Zurich, Sternwartstrasse 6, CH-8091 Zurich, Switzerland
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Alves HC, Valentim AM, Olsson IAS, Antunes LM. Intraperitoneal anaesthesia with propofol, medetomidine and fentanyl in mice. Lab Anim 2008; 43:27-33. [PMID: 19001064 DOI: 10.1258/la.2008.007036] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Fast recoveries are essential when looking for a safe anaesthetic protocol to use on mice. Propofol is a short-acting anaesthetic agent, which provides a smooth, fast recovery. A recent study carried out in our laboratory showed that the intraperitoneal (i.p.) administration of propofol combined with a fast-acting opioid does not provide a sufficiently stable anaesthesia. In this experiment, we hypothesized that the additional application of medetomidine would increase muscle relaxation and analgesia. Fifty-four male CD1 mice, divided into six groups of five and three groups of eight, were used to test nine different combinations of propofol, medetomidine and fentanyl administered i.p. and reversed with atipamezole 30 min after induction. These combinations were composed in the following manner: propofol 75 mg/kg, medetomidine 1 and 2 mg/kg and fentanyl 0.1, 0.15 and 0.2 mg/kg. The depth of anaesthesia, loss of righting reflex, loss of pedal withdrawal reflex, pulse rate and respiratory rate were recorded along with the duration and quality of the recovery. The combination of propofol and medetomidine provided a predictable induction, hypnosis and muscle relaxation, but surgical anaesthesia (loss of pedal withdrawal reflex) was not achieved. The addition of fentanyl increased analgesia leading to surgical anaesthesia. We concluded that a combination of 75/1/0.2 mg/kg of propofol, medetomidine and fentanyl, respectively, is a safe, easy and reversible technique for i.p. anaesthesia in mice, providing a surgical window of 15 min and restraint for 30 min with a fast recovery.
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Affiliation(s)
- H C Alves
- Centro de Estudos de Ciências Animais e Veterinárias, Universidade de Trás-os-Montes e Alto Douro, Apartado 1013, 5000-801 Vila Real, Portugal.
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