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Anesthetic neurotoxicity

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https://www.readbyqxmd.com/read/28549893/anesthetic-neurotoxicity-in-congenital-hand-surgery-an-overview-of-the-evidence-and-advice-for-counseling-parents
#1
REVIEW
Michael S Gart, Santhanam Suresh, Joshua M Adkinson
Millions of children undergo general anesthesia for surgical procedures each year, the implications of which are not fully understood. Animal models demonstrate neurotoxicity and long-term cognitive impairment following exposure to common general anesthetic agents. However, it is unclear if human brains are affected in a similar fashion and what-if any-the implications on cognitive development may be. Furthermore, it is not known if these effects are additive and if they can be avoided by delaying reconstruction...
May 24, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28495520/brain-uptake-of-deltamethrin-in-rats-as-a-function-of-plasma-protein-binding-and-blood-brain-barrier-maturation
#2
Manoj Amaraneni, Jing Pang, Tanzir B Mortuza, Srinivasa Muralidhara, Brian S Cummings, Catherine A White, Charles V Vorhees, Jason Zastre, James V Bruckner
Pyrethroids, including permethrin and deltamethrin (DLM), are very widely used of insecticides. It was hypothesized that lower plasma binding and increased blood-brain barrier (BBB) penetration of DLM in immature rats contribute to the higher brain concentrations of DLM and more pronounced neurotoxicity reported in this age group. The left brain of anesthetized adult rats was perfused for 2min via a carotid artery with 1μM (14)C-DLM in: 2-5% human serum albumin (HSA); plasma from adult and 15- and 21-d-old rats; and plasma from human donors of: birth-1 week, 1-4 weeks, 4 weeks-1 year, 1-3 years and adults...
May 8, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28484490/intraluminal-administration-of-resiniferatoxin-protects-against-clostridium-difficile-toxin-a-induced-colitis
#3
Steven R Vigna
Clostridium difficile toxin A is a colonic inflammatory agent that acts partially by activation of TRPV1 (transient receptor potential vanilloid type 1). Resiniferatoxin (RTX) is an excitotoxin that activates TRPV1 at low concentrations and defunctionalizes TRPV1 at high concentrations. RTX at various doses was injected intraluminally into isolated ileal segments in anesthetized rats. After 3 hours, the treated segments were removed and inflammation was assessed. This acute treatment with RTX resulted in biphasic responses: (1) an increase in inflammation similar to that caused by toxin A and capsaicin at low doses of up to 100 ng RTX and (2) no inflammatory effect of RTX at higher doses (1-100 μg), consistent with a defunctionalizing or neurotoxic effect of RTX at high doses...
2017: Gastroenterology Research and Practice
https://www.readbyqxmd.com/read/28466422/neurotoxicity-versus-neuroprotection-of-anesthetics-young-children-on-the-ropes
#4
Ramón Eizaga Rebollar, María V García Palacios, Javier Morales Guerrero, Luis M Torres Morera
Normal brain development in young children depends on a balance between excitation and inhibition of neurons, and alterations to this balance may cause apoptosis. During the perioperative period, both surgical stimuli and anesthetics can induce neurotoxicity. This article attempts to expand the perspective of a topical issue-anesthetic-induced neurotoxicity-by also considering the protective effect of general anesthetics against surgery-induced neurotoxicity, all of which may generate some controversy in the current literature...
May 2, 2017: Paediatric Drugs
https://www.readbyqxmd.com/read/28464014/analgesic-effect-of-perineural-magnesium-sulphate-for-sciatic-nerve-block-for-diabetic-toe-amputation-a-randomized-trial
#5
Jiehao Sun, Xiaona Feng, Qihan Zhu, Wendong Lin, Hailei Guo, Emmanuel Ansong, Le Liu
BACKGROUND AND OBJECTIVES: High concentrations of local anesthetics may be neurotoxic for diabetic patients. Additive perineural administration of magnesium was reported to decrease the consumption of local anesthetics for nerve block. It was hypothesized that MgSO4 added to dilute ropivacaine was equianalgesic to more concentrated ropivacaine for toe amputations in diabetic patients. METHODS: Seventy diabetic patients were allocated into 3 groups: 1) perineural 200 mg MgSO4 added to 0...
2017: PloS One
https://www.readbyqxmd.com/read/28463790/dexmedetomidine-inhibits-activation-of-the-mapk-pathway-and-protects-pc12-and-ng108-15-cells-from-lidocaine-induced-cytotoxicity-at-its-maximum-safe-dose
#6
Qiong Wang, Yonghong Tan, Na Zhang, Yingyi Xu, Wei Wei, Yingjun She, Xiaobao Bi, Baisong Zhao, Xiangcai Ruan
The developing brains of pediatric patients are highly vulnerable to anesthetic regimen (e.g., lidocaine), potentially causing neurological impairment. Recently, dexmedetomidine (DEX) has been used as an adjunct for sedation, and was shown to exert dose-dependent neuroprotective effects during brain injury. However, the maximum safe dose of DEX is unclear, and its protective effects against lidocaine-related neurotoxicity need to be confirmed. In this study, PC12 and NG108-15 cells were used to estimate safe, non-cytotoxic doses of DEX...
April 29, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28445771/cyclin-dependent-kinase-5-collapsin-response-mediator-protein-2-pathway-may-mediate-sevoflurane-induced-dendritic-development-abnormalities-in-rat-cortical-neurons
#7
Yafang Liu, Daowei Lin, Chuiliang Liu, Yifan Zhao, Zhiwen Shen, Kun Zhang, Minghui Cao, Yujuan Li
Sevoflurane has been reported to induce neurotoxicity and cognitive impairment in the developing brains. However, the underlying molecular mechanisms remain poorly understood. Recent studies have demonstrated aberrant cyclin-dependent kinase 5 (CDK5) activity is implicated in inhaled anesthetic-induced neurotoxicity. CDK5/CRMP2 signaling is involved in the cortical and hippocampal dendritic development. The aim of present study is to investigate whether the CDK5/CRMP2 pathway mediates sevoflurane-induced dendritic development abnormalities...
April 24, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28436683/dexmedetomidine-protects-pc12-cells-from-lidocaine-induced-cytotoxicity-through-downregulation-of-col3a1-mediated-by-mir-let-7b
#8
Qiong Wang, Yingjun She, Xiaobao Bi, Baisong Zhao, Xiangcai Ruan, Yonghong Tan
Safety concerns of some local anesthetics, such as lidocaine, have been raised in recent years due to potential neurological impairment. Dexmedetomidine may protect humans from neurotoxicity, and miR-let-7b is activated by nerve injury; however, the roles of miR-let-7b and its target gene in lidocaine-induced cytotoxicity are not well known. Through bioinformatics and a luciferase reporter assay, COL3A1 was suggested as a direct target gene of miR-let-7b. Here, we confirmed by measuring mRNA and protein levels that miR-let-7b was downregulated and COL3A1 was upregulated in lidocaine-treated cells, an observation that was reversed by dexmedetomidine...
April 24, 2017: DNA and Cell Biology
https://www.readbyqxmd.com/read/28435999/neonatal-propofol-anesthesia-changes-expression-of-synaptic-plasticity-proteins-and-increases-stereotypic-and-anxyolitic-behavior-in-adult-rats
#9
Desanka Milanovic, Vesna Pesic, Natasa Loncarevic-Vasiljkovic, Vladimir Avramovic, Vesna Tesic, Vesna Jevtovic-Todorovic, Selma Kanazir, Sabera Ruzdijic
Propofol is a general anesthetic commonly used in pediatric clinical practices. Experimental findings demonstrate that anesthetics induce widespread apoptosis and cognitive decline in a developing brain. Although anesthesia-mediated neurotoxicity is the most prominent during intense period of synaptogenesis, the effects of an early anesthesia exposure on the synapses are not well understood. The aim of this study was to examine the effects of neonatal propofol anesthesia on the expression of key proteins that participate in synaptogenesis and synaptic plasticity and to evaluate long-term neurobehavioral abnormalities in the mature adult brain...
April 24, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/28435095/application-of-advanced-preclinical-models-and-methods-in-anesthetic-neurotoxicity-research
#10
REVIEW
Cheng Wang, Xuan Zhang, Fang Liu
Recently, there has been increasing concern regarding the potential of anesthetics to disturb the long-term function of the central nervous system (CNS). The field of anesthesia-related toxicology, therefore, has engaged multiple scientific disciplines and utilized a variety of pre-clinical research models in an attempt to identify the basic characteristics of the anesthetic agents that may produce acute and/or chronic adverse effects on the CNS. This review discusses how the application of advanced research approaches and models, such as the nonhuman primate, neural stem cell-derived organotypic slice cultures and/or organs-on-chips systems, can serve as translational models of infantile anesthetic exposure...
April 20, 2017: Neurotoxicology and Teratology
https://www.readbyqxmd.com/read/28424007/anesthetic-related-neurotoxicity-and-neuroimaging-in-children-a-call-for-conversation
#11
Kara A Bjur, Eric T Payne, Michael E Nemergut, Danqing Hu, Randall P Flick
Each year millions of young children undergo procedures requiring sedation or general anesthesia. An increasing proportion of the anesthetics used are provided to optimize diagnostic imaging studies such as magnetic resonance imaging. Concern regarding the neurotoxicity of sedatives and anesthetics has prompted the US Food and Drug Administration to change labeling of anesthetics and sedative agents warning against repeated or prolonged exposure in young children. This review aims to summarize the risk of anesthesia in children with an emphasis on anesthetic-related neurotoxicity, acknowledge the value of pediatric neuroimaging, and address this call for conversation...
May 2017: Journal of Child Neurology
https://www.readbyqxmd.com/read/28393934/sevoflurane-decreases-self-renewal-capacity-and-causes-c-jun-n-terminal-kinase-mediated-damage-of-rat-fetal-neural-stem-cells
#12
Zeyong Yang, Jingjing Lv, Xingxing Li, Qiong Meng, Qiling Yang, Wei Ma, Yuanhai Li, Zun Ji Ke
Increasing studies have demonstrated that sevoflurane can induce neurotoxicity in the developing brains. JNK normally promotes apoptosis. It was hypothesized that sevoflurane affected the proliferation and differentiation of FNSCs and induced cell apoptosis, which caused the learning and memory deficits via JNK pathway. Sevoflurane at a concentration of 1.2% did not induce damage on the FNSCS. However, concentrations of 2.4% and 4.8% decreased the cell viability, as shown by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, and increased apoptosis, as shown by flow cytometry...
April 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28386342/hydrogen-rich-saline-attenuates-isoflurane-induced-caspase-3-activation-and-cognitive-impairment-via-inhibition-of-isoflurane-induced-oxidative-stress-mitochondrial-dysfunction-and-reduction-in-atp-levels
#13
Cheng Li, Lengchen Hou, Dan Chen, Fuqing Lin, Tao Chang, Mengzhu Li, Lingling Zhang, Xiaoyin Niu, Huiying Wang, Shukun Fu, Junhua Zheng
OBJECTIVES: The inhaled general anesthetic isoflurane has been shown to induce caspase-3 activation in vitro and in vivo. The underlying mechanisms and functional consequences of this activity remain unclear. Isoflurane can induce caspase-3 activation by causing accumulation of reactive oxygen species (ROS), mitochondrial dysfunction, and reduction in adenosine triphosphate (ATP) levels. This study aimed to investigate the protective effect of hydrogen, a novel antioxidant, against isoflurane-induced caspase-3 activation and cognitive impairment...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28373844/effects-of-ketamine-on-levels-of-inflammatory-cytokines-il-6-il-1%C3%AE-and-tnf-%C3%AE-in-the-hippocampus-of-mice-following-acute-or-chronic-administration
#14
Yanning Li, Ruipeng Shen, Gehua Wen, Runtao Ding, Ao Du, Jichuan Zhou, Zhibin Dong, Xinghua Ren, Hui Yao, Rui Zhao, Guohua Zhang, Yan Lu, Xu Wu
Ketamine is an injectable anesthetic and recreational drug of abuse commonly used worldwide. Many experimental studies have shown that ketamine can impair cognitive function and induce psychotic states. Neuroinflammation has been suggested to play an important role in neurodegeneration. Meanwhile, ketamine has been shown to modulate the levels of inflammatory cytokines. We hypothesized that the effects of ketamine on the central nervous system are associated with inflammatory cytokines. Therefore, we set out to establish acute and chronic ketamine administration models in C57BL/6 mice, to evaluate spatial recognition memory and emotional response, to analyze the changes in the levels of the inflammatory cytokines interleukin-6 (IL-6), interleukin-1β (IL-1β), and tumor necrosis factor-α (TNF-α) in the mouse hippocampus, employing behavioral tests, Western blot, quantitative reverse transcriptase-polymerase chain reaction (qRT-PCR) and immunohistochemistry...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28372649/can-we-reduce-anesthesia-exposure-neonatal-brain-mri-swaddling-vs-sedation-a-national-survey
#15
Benjamin J Heller, Francine S Yudkowitz, Scott Lipson
STUDY OBJECTIVE: Neonatal magnetic resonance imaging (MRI) is a diagnostic modality that requires minimal motion to acquire quality images. Sedation or even general anesthesia may be necessary to achieve acceptable scans. There is a growing body of literature, especially in animal studies, that links neurotoxicity with anesthetic exposure to the developing brain. There is no study outlining strategies used by neonatal intensive care units (NICU) to achieve quality MRI images with limited exposure to medications identified as possibly harmful to the developing brain...
May 2017: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/28319548/tanshinone-iia-attenuates-sevoflurane-neurotoxicity-in-neonatal-mice
#16
Yimeng Xia, Heng Xu, Chenfei Jia, Xiaodong Hu, Yu Kang, Xiaoxuan Yang, Qingsheng Xue, Guorong Tao, Buwei Yu
BACKGROUND: Sevoflurane is the most widely used inhalational anesthetic in pediatric medicine. Despite this, sevoflurane has been reported to exert potentially neurotoxic effects on the developing brain. Clinical interventions and treatments for these effects are limited. Tanshinone IIA (Tan IIA), extracted from Salvia miltiorrhiza (Danshen), has been documented to alleviate cognitive decline in traditional applications. Therefore, we hypothesized that preadministration of Tan IIA may attenuate sevoflurane-induced neurotoxicity, suggesting that Tan IIA is a new and promising drug capable of counteracting the effects of cognitive dysfunction produced by general anesthetics...
April 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28291734/safety-assessment-of-the-aqueous-extract-of-the-flowers-of-nymphaea-lotus-linn-nymphaeaceae-acute-neuro-and-subchronic-oral-toxicity-studies-in-albinos-wistar-rats
#17
Mireille Kameni Poumeni, Danielle Claude Bilanda, Paul Désiré Dzeufiet Djomeni, Yolande Sandrine Mengue Ngadena, Marguerite Francine Mballa, Madeleine Chantal Ngoungoure, Agnès Carolle Ouafo, Théophile Dimo, Pierre Kamtchouing
BACKGROUND: Nymphaea lotus Linn (N. lotus) is a medicinal plant widely used in Cameroon popular medicine, to treat neuropsychiatric conditions, male sexual disorders or as food supplement. However, scientific data on the pharmacotoxic profile of this plant are not available. The safety of N. lotus was assessed in acute, neuro- and subchronic toxicity studies by following the OECD guidelines. Effectively, no data have been published until now in regard to its safety on the nervous system...
March 14, 2017: Journal of Complementary & Integrative Medicine
https://www.readbyqxmd.com/read/28277380/update-on-developmental-anesthesia-neurotoxicity
#18
Laszlo Vutskits, Andrew Davidson
PURPOSE OF REVIEW: Adverse long-term impact of general anesthesia on the developing brain is a widely discussed and controversial issue with potential public health relevance. The goal of this article is to give insights into the most recent experimental and clinical observations aimed to advance our understanding in this field. RECENT FINDINGS: Recent investigations demonstrate long-term behavioral consequences of early-life anesthesia exposure in nonhuman primates under experimental conditions that are translationally relevant to human clinical practice...
June 2017: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/28256096/dexmedetomidine-sedation-combined-with-caudal-anesthesia-for-lower-abdominal-and-extremity-surgery-in-ex-preterm-and-full-term-infants
#19
Katrin Waurick, Cristina Sauerland, Christiane Goeters
BACKGROUND: Awake caudal anesthesia is a potentially attractive option, because the administration of general anesthesia is associated with a high rate of respiratory complications and hemodynamic disturbances and potential neurotoxic effects. To facilitate the caudal puncture and subsequent surgical intervention, additional sedatives are commonly administered. AIM: We aimed to establish a new, safe, and effective anesthetic procedure for very young children with comorbidities...
June 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/28254502/maternal-exposure-to-titanium-dioxide-nanoparticles-during-pregnancy-and-lactation-alters-offspring-hippocampal-mrna-bax-and-bcl-2-levels-induces-apoptosis-and-decreases-neurogenesis
#20
Alireza Ebrahimzadeh Bideskan, Abbas Mohammadipour, Alireza Fazel, Hossein Haghir, Houshang Rafatpanah, Mahmoud Hosseini, Aliakbar Rajabzadeh
INTRODUCTION: The usage of Titanium dioxide nanoparticles (TiO2-NPs) covers a vast area in different fields ranging from cosmetics and food to the production of drugs. Maternal exposure to TiO2-NPs during developmental period has been associated with hippocampal injury and with a decrease in learning and memory status of the offspring. However, little is known about its injury mechanism. This paper describes the in vivo neurotoxic effects of TiO2-NPs on rat offspring hippocampus during developmental period...
February 26, 2017: Experimental and Toxicologic Pathology: Official Journal of the Gesellschaft Für Toxikologische Pathologie
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