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Neuroinflammation anesthesia

Wei Xing, Pinjie Huang, Yang Lu, Weian Zeng, Zhiyi Zuo
Amantadine has been shown to reduce anesthesia and surgery-induced neuroinflammation and cognitive dysfunction. It is known that sepsis can impair brain function. We determined whether amantadine-attenuated sepsis-induced neuroinflammation and dysfunction of learning and memory and whether toll-like receptors (TLRs) play a role in the effects. Six- to eight-week-old mice were subjected to cecal ligation and puncture (CLP). Amantadine at 30 mg/kg/day was injected intraperitoneally for 3 days. CU-CPT22, a TLR1/TLR2 inhibitor, at 3 mg/kg/day was injected intraperitoneally for 2 days...
March 3, 2018: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
Miles Berger, Vikram Ponnusamy, Nathaniel Greene, Mary Cooter, Jacob W Nadler, Allan Friedman, David L McDonagh, Daniel T Laskowitz, Mark F Newman, Leslie M Shaw, David S Warner, Joseph P Mathew, Michael L James
Introduction: Aside from direct effects on neurotransmission, inhaled and intravenous anesthetics have immunomodulatory properties. In vitro and mouse model studies suggest that propofol inhibits, while isoflurane increases, neuroinflammation. If these findings translate to humans, they could be clinically important since neuroinflammation has detrimental effects on neurocognitive function in numerous disease states. Materials and methods: To examine whether propofol and isoflurane differentially modulate neuroinflammation in humans, cytokines were measured in a secondary analysis of cerebrospinal fluid (CSF) samples from patients prospectively randomized to receive anesthetic maintenance with propofol vs...
2017: Frontiers in Immunology
Anna N Taylor, Delia L Tio, Afshin Paydar, Richard L Sutton
Persistent inflammation, mediated in part by increases in cytokines, is a hallmark of traumatlc brain injury (TBI). Minocycline has been shown to inhibit post-TBI neuroinflammation in male rats and mice, but has not been tested in females. Here, we studied sex differences in thermal, stress, and inflammatory responses to TBI and minocycline. Female rats were ovariectomized under isoflurane anesthesia at 33-36 days of age. At 45-55 days of age, male and female rats were implanted intraperitoneally (i.p.) with calibrated transmitters for monitoring body temperature...
February 15, 2018: Journal of Neurotrauma
Xi Xin, Fei Xin, Xuguang Chen, Qi Zhang, Yanan Li, Shuping Huo, Chongfu Chang, Qiujun Wang
BACKGROUND: Postoperative delirium (POD) is a common disorder in the elderly patients, and neuroinflammation is the possible underlying mechanism. This study is designed to determine whether or not hypertonic saline (HS) pre-injection can alleviate POD in aged patients. METHODS: This prospective study recruited 120 geriatric patients who underwent hip surgery. The patients were randomly divided into two groups: control group (NS group) and HS group. Patients in the NS group were pre-injected with 4 mL/kg isotonic saline, and those in the HS group were pre-injected with 4 mL/kg 7...
November 14, 2017: Journal of Neuroinflammation
Lubin Huang, Kejing Huang, Hong Ning
AIM: As a widely used general anesthetic, sevoflurane has been found to induce cognitive and memory defectsin the elderly. This may increase the risk of Alzheimer's disease. This study explores the neuroprotective effect of hispidulin, a natural flavone compound, against sevoflurane-induced memory dysfunction. METHODS: The effect of sevoflurane exposure on memory function was evaluated by novel object recognition and Y-maze testing using an aged rat model. The apoptotic cell death in the hippocampus of rats was assessed using a TUNEL assay...
October 27, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
Haibin Zhou, Ting Luo, Changwei Wei, Wenzhen Shen, Ruilin Li, Anshi Wu
Neuroinflammation triggered by surgical trauma contributes to postoperative cognitive dysfunction (POCD). The receptor for advanced glycation end‑products (RAGE), a multiligand inflammatory receptor, is involved in the damaging effects of various cellular processes, contributing to neuroinflammation and neurodegeneration. However, the potential role of RAGE in the acute period of POCD has not been fully investigated. C57BL/6 male mice undergoing surgery of the tibia under isoflurane anesthesia were treated with the RAGE antagonist FPS‑ZM1 or vehicle control intraperitoneally for a period of 7 days...
October 2017: Molecular Medicine Reports
Penghui Wei, Qiang Zheng, Hui Liu, Tiantian Wan, Jinfeng Zhou, Dong Li, Haipeng Zhou, Jing Li, Fucheng Ji, Wenxi Tang, Jianjun Li
Introduction: The main purpose of this study was to investigate the effects and possible mechanisms of nicotine pre-treatment on postoperative cognitive dysfunction (POCD) in aged rats. Methods: Nicotine (0.5 mg/kg) was given i.p. immediately after anesthesia induction. After the Morris water maze test was used to evaluate the rats' spatial learning and memory, serum and hippocampal tissues were harvested 1 and 3 days after intervention. Inflammatory cytokines in the serum were evaluated by Enzyme-linked Immunosorbent Assay (ELISA)...
July 27, 2017: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
Zhong-Hong Kong, Xin Chen, Hui-Po Hua, Liang Liang, Long-Juan Liu
Neuroinflammation and Alzheimer's-related pathology play essential roles in postoperative cognitive dysfunction (POCD). High-mobility group box 1 (HMGB1) is well known as a pivotal mediator in neuroinflammation, and its associations with Alzheimer's-related pathology and POCD have been also revealed. Glycyrrhizin is a nature inhibitor of HMGB1 and is reported with neuroprotective effects through oral administration. Therefore, the present study aims to test the hypothesis that the oral pretreatment of glycyrrhizin prevents POCD by inhibiting HMGB1-induced neuroinflammation and Alzheimer's-related pathology in aged mice...
December 2017: Journal of Molecular Neuroscience: MN
Marco Cascella, Maria R Muzio, Sabrina Bimonte, Arturo Cuomo, Jan G Jakobsson
Postoperative delirium, the onset of confusion/delirium during the early postoperative phase, is the most common post-operative complication in older adults and represents a medical emergency that requires immediate assessment and treatment. On the other hand, the term postoperative cognitive decline or dysfunction refers to a wide spectrum of clinical conditions featuring a decline in a variety of neuropsychological domains including memory, executive functioning, and speed of processing emerging week to months after anesthesia and surgery...
October 4, 2017: Minerva Anestesiologica
Jiangjiang Bi, Weiran Shan, Ailin Luo, Zhiyi Zuo
BACKGROUND: Postoperative cognitive dysfunction (POCD) is a significant clinical syndrome. Neuroinflammation is an important pathological process for POCD. However, it is not clear how systemic inflammation induced by surgery on peripheral tissues or organs is transmitted into the brain. We determined whether matrix metallopeptidase 9 (MMP9), a protein that can increase blood-brain barrier permeability, is critical in this transmission. The role of MMP9 in age-dependent cognitive decline was also determined...
August 1, 2017: Oncotarget
Maria Fernanda Quiroz-Padilla, Gemma Guillazo-Blanch, Magdy Y Sanchez, Maria Andrea Dominguez-Sanchez, Rosa Margaria Gomez
Different anesthesia methods can variably influence excitotoxic lesion effects on the brain. The main purpose of this review is to identify potential differences in the toxicity to nervous system cells of two common inhalation anesthesia methods, isoflurane and sevoflurane, used in combination with an excitotoxic lesion procedure in rodents. The use of bioassays in animal models has provided the opportunity to examine the role of specific molecules and cellular interactions that underlie important aspects of neurotoxic effects relating to calcium homeostasis and apoptosis activation...
August 17, 2017: Current Pharmaceutical Design
Lin Chen, Wenji Xie, Wenqin Xie, Weiqiang Zhuang, Changcheng Jiang, Naizhen Liu
PURPOSE OF THE RESEARCH: Post operational cognitive dysfunction (POCD) occurs in patients after anesthesia and surgery. Abnormal histone acetylation and neuroinflammation are key factors in the pathogenesis of cognitive impairment. Apigenin not only has an anti-inflammatory activity but also modifies histone acetylation. We aimed to investigate whether apigenin can attenuate isoflurane exposure-induced cognitive decline by regulating histone acetylation and inflammatory signaling. MATERIALS AND METHODS: Spatial learning and memory were assessed by Morris water maze test...
July 6, 2017: Archives of Gerontology and Geriatrics
Lingling Sun, Rui Dong, Xin Xu, Xi Yang, Mian Peng
BACKGROUND: Neuroinflammation plays a major role in postoperative cognitive dysfunction (POCD). Accumulated evidence indicates that cannabinoid receptor type 2 (CB2R) can mediate anti-inflammatory and immunomodulatory effects in part by controlling microglial activity. However, the impact of CB2R on postoperative cognition has not been investigated. We hypothesized that CB2R is involved in surgery-induced cognitive impairment in adult mice. METHODS: Adult C57BL/6 mice were subjected to intramedullary fixation surgery for tibial fracture under isoflurane anesthesia and CB2R agonist (JWH133) or CB2R antagonist (AM630) treatment...
July 19, 2017: Journal of Neuroinflammation
Vincenzo Fodale, Vincenzo F Tripodi, Olivia Penna, Fausto Famà, Francesco Squadrito, Epifanio Mondello, Antonio David
While anesthetics are indispensable clinical tools and generally considered safe and effective, a growing concern over the potential neurotoxicity of anesthesia or specific anesthetic agents has called into question the safety of general anesthetics, especially when administered at extremes of age. Areas covered: This article reviews and updates research findings on the safety of anesthesia and anesthetics in terms of long-term neurotoxicity, with particular focus on postoperative cognitive dysfunctions, Alzheimer's disease and dementias, developing brain, post-operative depression and autism spectrum disorder...
September 2017: Expert Opinion on Drug Safety
Sheng-Jie Shiue, Hsien-Yu Peng, Chung-Ren Lin, Shih-Wei Wang, Ruey-Horng Rau, Jen-Kun Cheng
BACKGROUND AND OBJECTIVES: Cannabinoid receptors (CB1R/CB2R) are known to play important roles in pain transmission. In this study, we investigated the effects of continuous intrathecal infusion of CB1/2R agonists in the L5/6 spinal nerve ligation pain model. METHODS: Under isoflurane anesthesia, rats received nerve ligation and intrathecal catheter connected to an infusion pump. After surgery, saline (1 μL/h), CB1/2R agonist WIN55,212-2, CB1R agonist ACEA, or CB2R agonist AM1241 (1 μmol/h) was given intrathecally for 7 days...
July 2017: Regional Anesthesia and Pain Medicine
Jiangjiang Bi, Weiran Shan, Ailin Luo, Zhiyi Zuo
BACKGROUND: Postoperative cognitive dysfunction (POCD) is a significant clinical syndrome. Neuroinflammation is an important pathological process for POCD. However, it is not clear how systemic inflammation induced by surgery on peripheral tissues or organs is transmitted into the brain. We determined whether matrix metallopeptidase 9 (MMP9), a protein that can increase blood-brain barrier permeability, is critical in this transmission. The role of MMP9 in age-dependent cognitive decline was also determined...
February 20, 2017: Oncotarget
Yuanlin Dong, Zhipeng Xu, Lining Huang, Yiying Zhang, Zhongcong Xie
Post-operative cognitive dysfunction (POCD) is associated with morbidity, mortality and increased cost of medical care. However, the neuropathogenesis and targeted interventions of POCD remain largely to be determined. We have found that the peripheral surgical wounding induces an age-dependent Aβ accumulation, neuroinflammation and cognitive impairment in aged mice. Pro-inflammatory cytokine interlukin-6 (IL-6) has been reported to be associated with cognitive impairment in rodents and humans. However, the role of IL-6 in the neuropathogenesis of POCD is unknown...
October 2016: Medical Gas Research
Lingli Gui, Xi Lei, Zhiyi Zuo
Long duration of anesthesia may induce toxicity in the developing brain. However, little is known about the effects of the combination of surgery and anesthesia on the developing brain. The mechanisms for the effects are not clear. To determine these effects, postnatal day 7 male and female Sprague-Dawley rats were exposed to 3% sevoflurane for 2 h with or without right common carotid exposure. Pyrrolidine dithiocarbamate (PDTC), an anti-inflammatory agent, was given 30 min before and 6 h after the carotid exposure...
April 2017: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
Hong Zhang, Wenzhu Wang, Shanshan Jiang, Yi Zhang, Hye-Young Heo, Xianlong Wang, Yun Peng, Jian Wang, Jinyuan Zhou
The purpose of this study was to explore the capability and uniqueness of amide proton transfer-weighted (APTw) imaging in the detection of primary and secondary injury after controlled cortical impact (CCI)-induced traumatic brain injury (TBI) in rats. Eleven adult rats had craniotomy plus CCI surgery under isoflurane anesthesia. Multi-parameter MRI data were acquired at 4.7 T, at eight time points (1, 6 h, and 1, 2, 3, 7, 14, and 28 days after TBI). At one and six hours post-injury, average APTw signal intensities decreased significantly in the impacted and peri-lesional areas due to tissue acidosis...
October 2017: Journal of Cerebral Blood Flow and Metabolism
Chengmei Shi, Duan Yi, Zhengqian Li, Yongde Zhou, Yiyun Cao, Yan Sun, Dehua Chui, Xiangyang Guo
Several animal studies demonstrated that the volatile anesthetic isoflurane could influence the blood-brain barrier (BBB) integrity, which involved the cognitive impairment. Increasing evidence has also shown that the receptor for advanced glycation end-products (RAGE) played a major role in maintaining the integrity of BBB. The present study aimed to determine whether the RAGE-specific antibody protects against BBB disruption and cognitive impairment induced by isoflurane exposure in aged rats. 108 aged rats were randomly divided into four groups: (1) control group (Control); (2) 4h of 2% isoflurane exposure group (ISO); (3) RAGE antibody (20μL, 2...
March 30, 2017: Behavioural Brain Research
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