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Neuroapoptosis

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https://www.readbyqxmd.com/read/28411582/dexmedetomidine-attenuates-propofol-induce-neuroapoptosis-partly-via-the-activation-of-the-pi3k-akt-gsk3%C3%AE-pathway-in-the-hippocampus-of-neonatal-rats
#1
Jing Lv, Yi Wei, Yanhua Chen, Xu Zhang, Zheng Gong, Yage Jiang, Qin Gong, Lifang Zhou, Hao Wang, Yubo Xie
Recent studies have demonstrated that propofol causes neurodegeneration in developing brains. Evidence has shown that dexmedetomidine has neuroprotective effects. However, whether dexmedetomidine can reduce propofol-induced neuroapoptosis and by what mechanisms it acts remain unclear. We investigated whether dexmedetomidine can attenuate propofol-induced neuroapoptosis by disturbing the PI3K/Akt/GSK3β pathway during brain development. Seven-day-old rats were randomly exposed to 100mg/kg propofol and 100mg/kg propofol plus different doses of dexmedetomidine or 100mg/kg propofol and 75μg/kg dexmedetomidine plus PI3K inhibitor LY294002 or GSK3β inhibitor TDZD-8...
March 28, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28391017/pretreatment-with-minocycline-restores-neurogenesis-in-the-subventricular-zone-and-subgranular-zone-of-the-hippocampus-after-ketamine-exposure-in-neonatal-rats
#2
Yang Lu, P K Giri, Shan Lei, Juan Zheng, Weisong Li, Ning Wang, Xinlin Chen, Haixia Lu, Zhiyi Zuo, Yong Liu, Pengbo Zhang
Ketamine is commonly used for anesthesia in pediatric patients. Recent studies indicated that ketamine exposure in the developing brain can induce neuroapoptosis and disturb normal neurogenesis, which will result in long-lasting cognitive impairment. Minocycline exerts neuroprotection against a wide range of toxic insults in neurodegenerative disease models. In the present study, we investigated whether the disturbed neurogenesis and behavioral deficits after ketamine neonatal exposure could be alleviated by minocycline...
April 6, 2017: Neuroscience
https://www.readbyqxmd.com/read/28386360/neuroprotective-effect-of-mir-665-against-sevoflurane-anesthesia-induced-cognitive-dysfunction-in-rats-through-pi3k-akt-signaling-pathway-by-targeting-insulin-like-growth-factor-2
#3
Xihua Lu, Shuaiguo Lv, Yan Mi, Lei Wang, Gensheng Wang
The aim of this study was to investigate the in vivo and in vitro effects of miR-665 on sevoflurane anesthesia-induced cognitive dysfunction. SH-SY5Y cells and male SD rats were treated with sevoflurane to simulate anesthesia-induced cognitive dysfunction. The cells and rats both were transfected with a miR-665 mimic, inhibitor, scramble, IGF-2 siRNA, or treated with P13K/Akt inhibitor LY294002. The cell apoptosis, autophagy, growth related proteins, and mRNA levels were measured using different methods. The motor performance was assessed using the Morris water maze (MWM) test...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28380075/repeated-brief-isoflurane-anesthesia-during-early-postnatal-development-produces-negligible-changes-on-adult-behavior-in-male-mice
#4
Marko Rosenholm, Emmi Paro, Hanna Antila, Vootele Võikar, Tomi Rantamäki
Brain development is a complex process regulated by genetic programs and activity-dependent neuronal connectivity. Anesthetics profoundly alter neuronal excitability, and anesthesia during early brain development has been consistently associated with neuroapoptosis, altered synaptogenesis, and persistent behavioral abnormalities in experimental animals. However, the depth, and even more the duration and developmental time point(s) of exposure to anesthesia determine the neuropathological and long-term behavioral consequences of anesthetics...
2017: PloS One
https://www.readbyqxmd.com/read/28319548/tanshinone-iia-attenuates-sevoflurane-neurotoxicity-in-neonatal-mice
#5
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/28283552/anaesthetic-considerations-for-surgery-in-newborns
#6
Constance S Houck, Amy E Vinson
Almost 30 years ago, the American Academy of Pediatrics Committee on Fetus and Newborn coauthored a policy statement strongly advocating for the use of anaesthesia in all neonates stating 'local or systemic pharmacologic agents now available permit relatively safe administration of anesthesia or analgesia to neonates undergoing surgical procedures and that such administration is indicated according to the usual guidelines for the administration of anesthesia to high-risk, potentially unstable patients'. With current techniques and advanced monitoring, preterm and full-term infants routinely undergo surgical procedures under general anaesthesia to repair congenital defects that were lethal in years past...
March 10, 2017: Archives of Disease in Childhood. Fetal and Neonatal Edition
https://www.readbyqxmd.com/read/28282606/protection-against-cerebral-infarction-by-withaferin-a-involves-inhibition-of-neuronal-apoptosis-activation-of-pi3k-akt-signaling-pathway-and-reduced-intimal-hyperplasia-via-inhibition-of-vsmc-migration-and-matrix-metalloproteinases
#7
Qi-Zhi Zhang, Yu-Dong Guo, Hao-Mei Li, Rui-Zheng Wang, Shou-Gang Guo, Yi-Feng Du
PURPOSE: Stroke is a major public health concern with high rates of morbidity and mortality worldwide. Cerebral ischemia and infarction are commonly associated with stroke. Currently used medications, though effective, are also associated with adverse effects. Development of effective neuroprotective agents with fewer side effects would be of clinical value. We evaluated the effects of Withaferin A (WA), a steroidal lactone derived from the plant Withania somnifera, on experimentally induced cerebral infarction...
March 7, 2017: Advances in Medical Sciences
https://www.readbyqxmd.com/read/28236057/regulation-of-sirtuin-3-mediated-deacetylation-of-cyclophilin-d-attenuated-cognitive-dysfunction-induced-by-sepsis-associated-encephalopathy-in-mice
#8
Fan Sun, Yanna Si, Hongguang Bao, Yajie Xu, XiaoXiao Pan, Lingqing Zeng, Ling Jing
The present study aimed to investigate cognitive dysfunction in the hippocampus induced by sepsis-associated encephalopathy (SAE) via acetylation of cyclophilin D (CypD) and opening of mitochondrial permeability transition pore. It also explored whether activating sirtuin 3 (SIRT3) can mediate deacetylation of CypD and prevent the development of SAE. Male mice were randomly assigned to six groups: sham group, cecal ligation puncture group, CypD siRNA transfection (CypD-si) group, CypD control siRNA transfection (CypD-c) group, SIRT3 overexpression vector pcDNA3...
February 25, 2017: Cellular and Molecular Neurobiology
https://www.readbyqxmd.com/read/28173746/neurodegenerative-changes-and-neuroapoptosis-induced-by-systemic-lipopolysaccharide-administration-are-reversed-by-dexmedetomidine-treatment-in-mice
#9
Qiaoqing Ning, Zhaoguo Liu, Xiuhua Wang, Ruyi Zhang, Jing Zhang, Meizi Yang, Hongliu Sun, Fang Han, Wenxiang Zhao, Xiuli Zhang
BACKGROUND: Sepsis-associated encephalopathy (SAE) is a frequent and nasty complication of sepsis, associated with patients increased risk of death and long-term brain dysfunctions. OBJECTIVE: This study aimed to explore the effect of dexmedetomidine (Dex), an anesthetic adjuvant, on the development of SAE. METHODS: Lipopolysaccharide (LPS, 10 mg/kg) was intraperitoneally injected to male BALB/c mice to induce sepsis. Dex (25 μg/kg) was given intraperitoneally immediately after LPS injection...
April 2017: Neurological Research
https://www.readbyqxmd.com/read/28062893/prenatal-alcohol-induced-neuroapoptosis-in-rat-brain-cerebral-cortex-protective-effect-of-folic-acid-and-betaine
#10
Ibrahim Sogut, Onur Uysal, Aysegul Oglakci, Ferruh Yucel, Kazim Kartkaya, Gungor Kanbak
PURPOSE: Alcohol consumption in pregnancy may cause fetal alcohol syndrome (FAS) in the infant. This study aims to investigate prenatal alcohol exposure related neuroapoptosis on the cerebral cortex tissues of newborn rats and possible neuroprotective effects of betaine, folic acid, and combined therapy. METHODS: Pregnant rats were divided into five experimental groups: control, ethanol, ethanol + betaine, ethanol + folic acid, and ethanol + betaine + folic acid combined therapy groups...
March 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28056424/neonatal-anesthetic-neurotoxicity-insight-into-the-molecular-mechanisms-of-long-term-neurocognitive-deficits
#11
REVIEW
Deshui Yu, Linji Li, Weiguo Yuan
Mounting animal studies have demonstrated that almost all the clinically used general anesthetics could induce widespread neuroapoptosis in the immature brain. Alarmingly, some published findings have reported long-term neurocognitive deficits in response to early anesthesia exposure which deeply stresses the potential seriousness of developmental anesthetic neurotoxicity. However, the connection between anesthesia induced neuroapoptosis and subsequent neurocognitive deficits remains controversial. It should be noted that developmental anesthesia related neurotoxicity is not limited to neuroapoptosis...
March 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27981535/remote-ischemic-preconditioning-provides-neuroprotection-impact-on-ketamine-induced-neuroapoptosis-in-the-developing-rat-brain
#12
W Ma, Y-Y Cao, S Qu, S-S Ma, J-Z Wang, L-Q Deng, W-J Yuan, J-H Meng
OBJECTIVE: Previous studies have demonstrated that the commonly used anesthetic ketamine can acutely increase apoptosis and have long-lasting detrimental effects on cognitive function as the animal matures. Remote ischemic preconditioning (RIPC) has been confirmed to have a cerebral protective role in animal models of brain damage. The aim of this study was to investigate whether RIPC can protect the developing brain from anesthetic-induced neurotoxicity. MATERIALS AND METHODS: To investigate the protective properties of RIPC, 60 new-born Sprague-Dawley (SD) rats were randomly allocated into four groups: ketamine (20 mg/kg was diluted in saline, six times at an interval of 2 hours); RIPC (left hind row ischemia 5 min, reperfusion 5 min, a total of four cycles); ketamine + RIPC: RIPC was induced at postnatal day 5 and rats underwent the same treatment with the ketamine group after 48 hours; and saline (group vehicle)...
December 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27959401/midazolam-anesthesia-protects-neuronal-cells-from-oxidative-stress-induced-death-via-activation-of-the-jnk-erk-pathway
#13
Jing-Yu Liu, Feng Guo, Hong-Ling Wu, Ying Wang, Jin-Shan Liu
Midazolam is an anesthetic agent commonly used during clinical and surgical procedures, which has been shown to exert ROS‑suppressing and apoptosis‑modulating pharmacological activities in various cellular systems. However, the effects of midazolam on oxidative stress in neuronal cells require elucidation. The present study investigated the effects of midazolam on buthionine sulfoximine (BSO)‑ and hydrogen peroxide (H2O2)‑induced oxidative stress in primary cortical neuronal cells. In addition, the effects of midazolam on middle cerebral artery occlusion (MCAO) in mice and on ethanol‑induced neuroapoptosis in the brains of neonatal mice were determined...
January 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27924651/caffeine-combined-with-sedative-anesthetic-drugs-triggers-widespread-neuroapoptosis-in-a-mouse-model-of-prematurity
#14
Omar Hoseá Cabrera, Shawn David O'Connor, Brant Stephen Swiney, Patricia Salinas-Contreras, Francesca Maria Manzella, George Townsend Taylor, Kevin Kiyoshi Noguchi
OBJECTIVES: Caffeine (CAF) and sedative/anesthetic drugs (SADs) are often coadministered to premature infants in the neonatal intensive care unit (NICU). While SAD neurotoxicity in the developing brain is well established, it is not fully clear whether CAF interacts with SADs and whether this interaction is detrimental. Using a mouse model of prematurity, we hypothesized that CAF would increase apoptotic neurotoxicity when coadministered with SADs. METHODS: Postnatal day 3 mice were treated with vehicle or 80 mg/kg CAF prior to challenge with 6 mg/kg midazolam, 40 mg/kg ketamine, or 40 μg/kg fentanyl...
December 7, 2016: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/27918332/isoflurane-impairs-motor-function-recovery-by-increasing-neuroapoptosis-and-degeneration-during-spinal-ischemia-reperfusion-injury-in-rats
#15
Shih-Yuan Fang, Jung-Shun Lee, Jun-Neng Roan, Yu-Chuan Tsai, Chen-Fuh Lam
BACKGROUND: Spinal cord ischemia (SCI) leads to variable degrees of neurologic deficit in patients undergoing major cardiovascular surgery. The effect of intraoperative neuroprotection against SCI and the subsequent ischemia-reperfusion injury is still limited. Because isoflurane is a commonly used anesthetic agent during major operation, and its neuroprotective and neurotoxicity effects have both been discussed, this study aimed to investigate the effect of isoflurane on the spinal cord's functional recovery in a rat model of cord ischemia...
January 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/27895665/sugammadex-enhanced-neuronal-apoptosis-following-neonatal-sevoflurane-exposure-in-mice
#16
Maiko Satomoto, Zhongliang Sun, Yushi U Adachi, Koshi Makita
In rodents, neonatal sevoflurane exposure induces neonatal apoptosis in the brain and results in learning deficits. Sugammadex is a new selective neuromuscular blockade (NMB) binding agent that anesthesiologists can use to achieve immediate reversal of an NMB with few side effects. Given its molecular weight of 2178, sugammadex is thought to be unable to pass through the blood brain barrier (BBB). Volatile anesthetics can influence BBB opening and integrity. Therefore, we investigated whether the intraperitoneal administration of sugammadex could exacerbate neuronal damage following neonatal 2% sevoflurane exposure via changes in BBB integrity...
2016: Anesthesiology Research and Practice
https://www.readbyqxmd.com/read/27826117/neonatal-inhibition-of-na-k-2cl-cotransporter-prevents-ketamine-induced-spatial-learning-and-memory-impairments
#17
Ryan A Stevens, Brandon D Butler, Saurabh S Kokane, Andrew W Womack, Qing Lin
Prolonged ketamine exposure in neonates at anesthetic doses is known to cause long-term impairments of learning and memory. A current theoretical mechanism explains this phenomenon as being neuro-excitotoxicity mediated by compensatory upregulation of N-methyl-d-aspartate receptors (NMDARs), which then initiates widespread neuroapoptosis. Additionally, the excitatory behavior of GABAergic synaptic transmission mediated by GABAA receptors (GABAARs), occurring during the early neuronal development period, is proposed as contributing to the susceptibility of neonatal neurons to ketamine-induced injury...
March 2017: Neurotoxicology and Teratology
https://www.readbyqxmd.com/read/27820974/oroxylin-a-inhibits-h2o2-induced-oxidative-stress-in-pc12-cells
#18
Qinghe Han, Haiyu Wang, Chong Xiao, Ben-Dong Fu, Chong-Tao Du
Oroxylin A, a natural flavonoid isolated from Scutellaria baicalensis, has been reported to have anti-inflammatory and antioxidant effects. However, suppression of oxidative stress and neuroapoptosis by oroxylin A is largely uninvestigated. To investigate the protective effects of oroxylin A, PC12 cells were exposed to oroxylin A and hydrogen peroxide solutions and measured. Oroxylin A significantly reduced the levels of intracellular calcium and reactive oxygen species and increased the levels of CAT and Mn/SOD...
November 7, 2016: Natural Product Research
https://www.readbyqxmd.com/read/27682474/sevoflurane-induced-endoplasmic-reticulum-stress-contributes-to-neuroapoptosis-and-bace-1-expression-in-the-developing-brain-the-role-of-eif2%C3%AE
#19
Bin Liu, Junming Xia, Yali Chen, Jun Zhang
Neonatal exposure to volatile anesthetics causes apoptotic neurodegeneration in the developing brain, possibly leading to neurocognitive deficits in adulthood. Endoplasmic reticulum (ER) stress might be associated with sevoflurane (sevo)-induced neuroapoptosis. However, the signaling pathway regulating sevo-induced neuroapoptosis is not understood. We investigated the effects of neonatal sevo exposure on ER signaling pathway activation. Seven-day-old mouse pups were divided into control (C) and sevo (S; 3 % sevo exposure, 6 h) groups...
September 28, 2016: Neurotoxicity Research
https://www.readbyqxmd.com/read/27604310/selective-cerebral-perfusion-prevents-abnormalities-in-glutamate-cycling-and-neuronal-apoptosis-in-a-model-of-infant-deep-hypothermic-circulatory-arrest-and-reperfusion
#20
Masaki Kajimoto, Dolena R Ledee, Aaron K Olson, Nancy G Isern, Isabelle Robillard-Frayne, Christine Des Rosiers, Michael A Portman
Deep hypothermic circulatory arrest is often required for the repair of complex congenital cardiac defects in infants. However, deep hypothermic circulatory arrest induces neuroapoptosis associated with later development of neurocognitive abnormalities. Selective cerebral perfusion theoretically provides superior neural protection possibly through modifications in cerebral substrate oxidation and closely integrated glutamate cycling. We tested the hypothesis that selective cerebral perfusion modulates glucose utilization, and ameliorates abnormalities in glutamate flux, which occur in association with neuroapoptosis during deep hypothermic circulatory arrest...
November 2016: Journal of Cerebral Blood Flow and Metabolism
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