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Miniksar ÖH, Çiçekçioğlu F, Kılıç M, Honca M, Miniksar DY, Gocmen AY, Kaçmaz O, Öz H. Decreased brain-derived neurotrophic factor levels may predict early perioperative neurocognitive disorder in patients undergoing coronary artery bypass surgery: A prospective observational pilot study. J Clin Anesth 2021; 71:110235. [PMID: 33774438 DOI: 10.1016/j.jclinane.2021.110235] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 02/11/2021] [Accepted: 02/12/2021] [Indexed: 02/07/2023]
Abstract
STUDY OBJECTIVE To determine the prognostic value of the change in intraoperative BDNF (Brain-derived neurotrophic factor) levels during cardiac surgery with cardiopulmonary bypass (CPB) on early perioperative neurocognitive disorder (PND). DESIGN Prospective observational pilot study. SETTING The study was performed in the Medical Faculty Hospital, from January 2020 to August 2020. PATIENTS 45 adult patients undergoing elective coronary artery bypass surgery (CABG) with CPB. INTERVENTIONS None. MEASUREMENTS Cognitive function was evaluated 1 day before and 4 days after the surgery. Serum BDNF levels were measured at four time points (T1: after induction; T2: with aortic cross-clamp; T3: without aortic cross-clamp; T4: 4 days after surgery) by enzyme-linked immunosorbent assay. MAIN RESULTS The incidence of PND was 37.8% four days after surgery. Serum BDNF (T2 and T4) levels were significantly lower in PND group compared to non- PND group (p = 0.003 and p = 0.016, respectively). Moreover, lactate, rSO2 (regional cerebral oxygen saturation), aortic cross-clamp time, CPB duration, and the amount of blood transfusion differed between the groups. Logistic regression analysis identified serum BDNF-T2, age, cross-clamp time, and rSO2-T2 as independent risk factors for PND. Based on the ROC analysis, the area under curve (AUC) of BDNF-T2 concentration for prediction of PND was 0.759 with sensitivity of 71.4% and specificity of 64.7% (p < 0.01). CONCLUSION Intraoperative BDNF serum levels may be a useful biomarker in predicting PND in patients undergoing CABG surgery. More comprehensive studies is needed in order to confirm the effect of decreasing intraoperative BDNF serum levels on the development of PND. TRIAL REGISTRATION NUMBER NCT04250935 www.clinicaltrials.gov.
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Affiliation(s)
- Ökkeş Hakan Miniksar
- Department of Anesthesiology and Reanimation, Faculty of Medicine, Yozgat Bozok University, Yozgat, Turkey.
| | - Ferit Çiçekçioğlu
- Department of Cardiovascular Surgery, Faculty of Medicine, Yozgat Bozok University, Yozgat, Turkey
| | - Mahmut Kılıç
- Department of Public Health, Faculty of Medicine, Yozgat Bozok University, Yozgat, Turkey
| | - Mehtap Honca
- Department of Anesthesiology and Reanimation, Faculty of Medicine, Yozgat Bozok University, Yozgat, Turkey
| | - Dilşad Yıldız Miniksar
- Department of Child and Adolescent Psychiatry, Faculty of Medicine, Yozgat Bozok University, Yozgat, Turkey
| | - Ayse Yesim Gocmen
- Department of Biochemistry, Faculty of Medicine, Yozgat Bozok University, Yozgat, Turkey
| | - Osman Kaçmaz
- Department of Anesthesiology and Reanimation, Malatya Training and Research Hospital, Turgut Ozal University, Malatya, Turkey
| | - Hakan Öz
- Department of Anesthesiology and Reanimation, Faculty of Medicine, Yozgat Bozok University, Yozgat, Turkey
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Oberman K, Hovens I, de Haan J, Falcao-Salles J, van Leeuwen B, Schoemaker R. Acute pre-operative ibuprofen improves cognition in a rat model for postoperative cognitive dysfunction. J Neuroinflammation 2021; 18:156. [PMID: 34238316 PMCID: PMC8265047 DOI: 10.1186/s12974-021-02206-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 06/23/2021] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Inflammation is considered a key factor in the development of postoperative cognitive dysfunction (POCD). Therefore, we hypothesized that pre-operative anti-inflammatory treatment with ibuprofen would inhibit POCD in our rat-model. METHODS Male Wistar rats of 3 or 23 months old received a single injection of ibuprofen (15 mg/kg i.p.) or were control handled before abdominal surgery. Timed blood and fecal samples were collected for analyses of inflammation markers and gut microbiome changes. Behavioral testing was performed from 9 to 14 days after surgery, in the open field, novel object- and novel location-recognition tests and Morris water maze. Neuroinflammation and neurogenesis were assessed by immune histochemistry after sacrifice on postoperative day 14. RESULTS Ibuprofen improved short-term spatial memory in the novel location recognition test, and increased hippocampal neurogenesis. However, these effects were associated with increased hippocampal microglia activity. Whereas plasma cytokine levels (IL1-β, IL6, IL10, and TNFα) were not significantly affected, VEGF levels increased and IFABP levels decreased after ibuprofen. Long-term memory in the Morris water maze was not significantly improved by ibuprofen. The gut microbiome was neither significantly affected by surgery nor by ibuprofen treatment. In general, effects in aged rats appeared similar to those in young rats, though less pronounced. CONCLUSION A single injection of ibuprofen before surgery improved hippocampus-associated short-term memory after surgery and increased neurogenesis. However, this favorable outcome seemed not attributable to inhibition of (neuro)inflammation. Potential contributions of intestinal and blood-brain barrier integrity need further investigation. Although less pronounced compared to young rats, effects in aged rats indicate that even elderly individuals could benefit from ibuprofen treatment.
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Affiliation(s)
- Klaske Oberman
- Department of Neurobiology, GELIFES, University of Groningen, Nijenborgh 7, 9747, AG, Groningen, The Netherlands
| | - Iris Hovens
- Department of Neurobiology, GELIFES, University of Groningen, Nijenborgh 7, 9747, AG, Groningen, The Netherlands
| | - Jacco de Haan
- Department of Medical Oncology, University Medical Center Groningen, Groningen, The Netherlands
| | - Joana Falcao-Salles
- Department of Microbial Ecology, GELIFES, University of Groningen, Groningen, The Netherlands
| | - Barbara van Leeuwen
- Department of Surgery, University Medical Center Groningen, Groningen, The Netherlands
| | - Regien Schoemaker
- Department of Neurobiology, GELIFES, University of Groningen, Nijenborgh 7, 9747, AG, Groningen, The Netherlands.
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Chen XD, Zhao J, Yang X, Zhou BW, Yan Z, Liu WF, Li C, Liu KX. Gut-Derived Exosomes Mediate Memory Impairment After Intestinal Ischemia/Reperfusion via Activating Microglia. Mol Neurobiol 2021; 58:4828-4841. [PMID: 34189701 DOI: 10.1007/s12035-021-02444-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 06/05/2021] [Indexed: 12/30/2022]
Abstract
Intestinal ischemia/reperfusion is a grave condition with high morbidity and mortality in perioperative and critical care settings and causes multiple organ injuries beyond the intestine, including brain injury. Exosomes act as intercellular communication carriers by the transmission of their cargo to recipient cells. Here, we investigate whether exosomes derived from the intestine contribute to brain injury after intestinal ischemia/reperfusion via interacting with microglia in the brain. Intestinal ischemia/reperfusion was established in male C57/BL mice by clamping the superior mesenteric artery for 30 min followed by reperfusion. The sham surgery including laparotomy and isolation of the superior mesenteric artery without occlusion was performed as control. Male C57 mouse was intracerebral ventricular injected with intestinal exosomes from mice of intestinal ischemia/reperfusion or sham surgery. Primary microglia were cocultured with intestinal exosomes; HT-22 cells were treated with intestinal exosomes or microglia conditioned media. Intestinal ischemia/reperfusion-induced microglial activation, neuronal loss, synaptic stability decline, and cognitive deficit. Intracerebral ventricular injection of intestinal exosomes from intestinal ischemia/reperfusion mice causes microglial activation, neuronal loss, synaptic stability decline, and cognitive impairment. Microglia can incorporate intestinal exosomes both in vivo and in vitro. Microglia activated by intestinal exosomes increases neuron apoptotic rate and decreases synaptic stability. This study indicates that intestinal exosomes mediate memory impairment after intestinal ischemia/reperfusion via activating microglia. Inhibiting exosome secretion or suppressing microglial activation can be a therapeutic target to prevent memorial impairment after intestinal ischemia/reperfusion.
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Affiliation(s)
- Xiao-Dong Chen
- Department of Anesthesiology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Jin Zhao
- Department of Anesthesiology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Xiao Yang
- Department of Anesthesiology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Bo-Wei Zhou
- Department of Anesthesiology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Zhengzheng Yan
- Department of Anesthesiology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Wei-Feng Liu
- Department of Anesthesiology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Cai Li
- Department of Anesthesiology, Nanfang Hospital, Southern Medical University, Guangzhou, China.
| | - Ke-Xuan Liu
- Department of Anesthesiology, Nanfang Hospital, Southern Medical University, Guangzhou, China.
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van Zuylen ML, Gribnau A, Admiraal M, Ten Hoope W, Veelo DP, Hollmann MW, Preckel B, Hermanides J. The role of intraoperative hypotension on the development of postoperative cognitive dysfunction: a systematic review. J Clin Anesth 2021; 72:110310. [PMID: 33932723 DOI: 10.1016/j.jclinane.2021.110310] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 04/09/2021] [Accepted: 04/11/2021] [Indexed: 11/25/2022]
Abstract
STUDY OBJECTIVE To clarify whether intraoperative hypotension contributes to the development of postoperative cognitive dysfunction. DESIGN A systematic review of prospective studies reporting on intraoperative hypotension and postoperative cognitive dysfunction in elective, non-cognitive impaired, adult surgical patients. PubMed, EMBASE and the Cochrane Library were searched up to the 1st of January 2021. SETTING Studies had to use a clear definition of hypotension, although differing definitions were accepted. Neurocognitive tests to determine postoperative cognitive dysfunction had to be done pre- and postoperatively, with a minimum follow-up of seven days postoperatively. MEASUREMENTS Risk of bias was assessed using the Cochrane Risk of Bias Tool 2.0 for randomized controlled trials and the Newcastle-Ottawa Scale for cohort studies. MAIN RESULTS Out of 941 studies screened, five randomized controlled trials and four cohort studies were included for qualitative analysis. Extensive methodological differences between studies were present hindering proper quantitive analysis. No studies reported statistically significant differences in incidence of postoperative cognitive dysfunction in hypo- compared to normotensive patients. Five studies reported exact incidences of postoperative cognitive dysfunction. CONCLUSIONS This systematic review showed no conclusive association between intraoperative hypotension and the development of postoperative cognitive dysfunction. Given the vast methodological differences of the included studies, the role of intraoperative hypotension in the development of postoperative cognitive dysfunction remains uncertain. Future research into the association between intraoperative hypotension and postoperative cognitive dysfunction should be conducted in a standardized manner.
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Affiliation(s)
- Mark L van Zuylen
- Department of Anaesthesiology, Amsterdam UMC, University of Amsterdam, Meibergdreef, Amsterdam, the Netherlands.
| | - Annerixt Gribnau
- Department of Anaesthesiology, Amsterdam UMC, University of Amsterdam, Meibergdreef, Amsterdam, the Netherlands.
| | - Manouk Admiraal
- Department of Anaesthesiology, Amsterdam UMC, University of Amsterdam, Meibergdreef, Amsterdam, the Netherlands.
| | - Werner Ten Hoope
- Department of Anaesthesiology, Amsterdam UMC, University of Amsterdam, Meibergdreef, Amsterdam, the Netherlands; Department of Anaesthesiology, Rijnstate Hospital, Arnhem, the Netherlands.
| | - Denise P Veelo
- Department of Anaesthesiology, Amsterdam UMC, University of Amsterdam, Meibergdreef, Amsterdam, the Netherlands.
| | - Markus W Hollmann
- Department of Anaesthesiology, Amsterdam UMC, University of Amsterdam, Meibergdreef, Amsterdam, the Netherlands.
| | - Benedikt Preckel
- Department of Anaesthesiology, Amsterdam UMC, University of Amsterdam, Meibergdreef, Amsterdam, the Netherlands.
| | - Jeroen Hermanides
- Department of Anaesthesiology, Amsterdam UMC, University of Amsterdam, Meibergdreef, Amsterdam, the Netherlands.
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Cheon SY, Koo BN, Kim SY, Kam EH, Nam J, Kim EJ. Scopolamine promotes neuroinflammation and delirium-like neuropsychiatric disorder in mice. Sci Rep 2021; 11:8376. [PMID: 33863952 PMCID: PMC8052461 DOI: 10.1038/s41598-021-87790-y] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Accepted: 04/05/2021] [Indexed: 01/13/2023] Open
Abstract
Postoperative delirium is a common neuropsychiatric syndrome resulting a high postsurgical mortality rate and decline in postdischarge function. Extensive research has been performed on both human and animal delirium-like models due to their clinical significance, focusing on systematic inflammation and consequent neuroinflammation playing a key role in the pathogenesis of postoperative cognitive dysfunctions. Since animal models are widely utilized for pathophysiological study of neuropsychiatric disorders, this study aimed at examining the validity of the scopolamine-induced delirium-like mice model with respect to the neuroinflammatory hypothesis of delirium. Male C57BL/6 mice were treated with intraperitoneal scopolamine (2 mg/kg). Neurobehavioral tests were performed to evaluate the changes in cognitive functions, including learning and memory, and the level of anxiety after surgery or scopolamine treatment. The levels of pro-inflammatory cytokines (IL-1β, IL-18, and TNF-α) and inflammasome components (NLRP3, ASC, and caspase-1) in different brain regions were measured. Gene expression profiles were also examined using whole-genome RNA sequencing analyses to compare gene expression patterns of different mice models. Scopolamine treatment showed significant increase in the level of anxiety and impairments in memory and cognitive function associated with increased level of pro-inflammatory cytokines and NLRP3 inflammasome components. Genetic analysis confirmed the different expression patterns of genes involved in immune response and inflammation and those related with the development of the nervous system in both surgery and scopolamine-induced mice models. The scopolamine-induced delirium-like mice model successfully showed that analogous neuropsychiatric changes coincides with the neuroinflammatory hypothesis for pathogenesis of delirium.
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Affiliation(s)
- So Yeong Cheon
- Department of Biotechnology, College of Biomedical and Health Science, Konkuk University, Chungju, Republic of Korea
| | - Bon-Nyeo Koo
- Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.,Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - So Yeon Kim
- Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.,Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Eun Hee Kam
- Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.,Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Junhyun Nam
- Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Eun Jung Kim
- Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea. .,Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Republic of Korea.
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Cho I, Kim JM, Kim EJ, Kim SY, Kam EH, Cheong E, Suh M, Koo BN. Orthopedic surgery-induced cognitive dysfunction is mediated by CX3CL1/R1 signaling. J Neuroinflammation 2021; 18:93. [PMID: 33858422 PMCID: PMC8048361 DOI: 10.1186/s12974-021-02150-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Accepted: 04/05/2021] [Indexed: 12/31/2022] Open
Abstract
Background Postoperative pain is a common phenomenon after surgery and is closely associated with the development of postoperative cognitive dysfunction (POCD). Persistent pain and systemic inflammation caused by surgery have been suggested as key factors for the development of POCD. Fractalkine (CX3CL1) and its receptor, the CX3C chemokine receptor 1 (CX3CR1), are known to play a key role in pain and inflammation signaling pathways. Recent studies have shown that the regulation of CX3CR1/L1 signaling influences the development of various diseases including neuronal diseases. We determined whether CX3CR1/L1 signaling is a putative therapeutic target for POCD in a mouse model. Methods Adult (9–11 weeks) male mice were treated with neutralizing antibody to block CX3CR1/L1 signaling both before and after surgery. Inflammatory and behavioral responses including pain were assessed postoperatively. Also, CX3CR1 mRNA level was assessed. Hippocampal astrocyte activation, Mao B expression, and GABA expression were assessed at 2 days after surgery following neutralizing antibody administration. Results The behavioral response indicated cognitive dysfunction and development of pain in the surgery group compared with the control group. Also, increased levels of pro-inflammatory cytokines and CX3CR1 mRNA were observed in the surgery group. In addition, increased levels of GABA and increased Mao B expression were observed in reactive astrocytes in the surgery group; these responses were attenuated by neutralizing antibody administration. Conclusions Increased CX3CR1 after surgery is both necessary and sufficient to induce cognitive dysfunction. CX3CR1 could be an important target for therapeutic strategies to prevent the development of POCD. Supplementary Information The online version contains supplementary material available at 10.1186/s12974-021-02150-x.
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Affiliation(s)
- Inja Cho
- Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, 50-1, Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.,Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Jeong Min Kim
- Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, 50-1, Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.,Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Eun Jung Kim
- Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, 50-1, Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.,Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - So Yeon Kim
- Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, 50-1, Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.,Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Eun Hee Kam
- Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, 50-1, Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.,Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Eunji Cheong
- Department of Biotechnology, College of Life Science and Biotechnology, Yonsei University, Seoul, Republic of Korea
| | - Minah Suh
- Department of Biomedical Engineering, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon-si, Gyeong gi-do, 16419, Republic of Korea.,Center for Neuroscience Imaging Research (CNIR), Institute for Basic Science (IBS), Sungkyunkwan University, Suwon, Korea.,Biomedical Institute for Convergence at SKKU (BICS), Sungkyunkwan University, Suwon, 16419, South Korea.,Samsung Advanced Institute for Health Sciences & Technology (SAIHST), Sungkyunkwan University, Suwon, 16419, South Korea
| | - Bon-Nyeo Koo
- Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, 50-1, Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea. .,Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Korea.
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Yu L, Wen G, Zhu S, Hu X, Huang C, Yang Y. Abnormal phosphorylation of tau protein and neuroinflammation induced by laparotomy in an animal model of postoperative delirium. Exp Brain Res 2021; 239:867-880. [PMID: 33409674 DOI: 10.1007/s00221-020-06007-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 12/05/2020] [Indexed: 10/22/2022]
Abstract
Postoperative delirium (POD) is an acute neuropsychological disturbance after surgery, whose prevalence is related with advancing age. Neuroinflammation and abnormal tau phosphorylation that commonly presenting in Alzheimer's disease (AD) may contribute to the progression and duration of POD. To study the acute influence of surgery on cognitive function, wild type male C57BL/6 N mice were randomly divided into three groups: Control (CON), Laparotomy at 4 h and 24 h (LAP-4 h, LAP-24 h), then subjected to laparotomy under sevoflurane anaesthesia. The cognitive performance, peripheral and central inflammatory responses and tau phosphorylation levels were evaluated at 4 h and 24 h postoperatively. When LAP4-hrs displayed anxiety behaviors with high mRNA levels of inflammatory cytokines, such as interleukin-1β (IL-1β), IL-6, IL-8, TNF-α and MCP-1 in the liver, and IL-8 in the hippocampus, results at 24 h were different. In the liver, only IL-10 protein was obviously elevated, but in the hippocampus, both pro- and anti-inflammatory cytokines were significantly decreased whilst the elimination of anxiety. The activity of major related kinases and phosphatases was remarkably changed which may contribute to the dephosphorylated tau protein. With tremendous neuropathological changes and significant numbers of activated microglias and astrocytes observed in the sub-regions of hippocampus, the memory impairment existed at both 4 h and 24 h. Since the association of dephosphorylated tau with POD, these findings may supply novel implications for the understanding of tauopathies and as a theoretical basis for preventions from the postoperative cognitive dysfunction (POCD).
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Affiliation(s)
- Le Yu
- Department of Pharmacology, School of Basic Medical Sciences, Key Laboratory of Anti-Inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230001, People's Republic of China.,Department of Anesthesiology and Perioperative Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230001, People's Republic of China.,Key Laboratory of Anesthesiology and Perioperative Medicine of Anhui Higher Education Institutes, Hefei, Anhui, People's Republic of China
| | - Guanghua Wen
- Department of Pharmacology, School of Basic Medical Sciences, Key Laboratory of Anti-Inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230001, People's Republic of China
| | - Shoufeng Zhu
- Department of Anesthesiology and Perioperative Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230001, People's Republic of China.,Key Laboratory of Anesthesiology and Perioperative Medicine of Anhui Higher Education Institutes, Hefei, Anhui, People's Republic of China
| | - Xianwen Hu
- Department of Anesthesiology and Perioperative Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230001, People's Republic of China.,Key Laboratory of Anesthesiology and Perioperative Medicine of Anhui Higher Education Institutes, Hefei, Anhui, People's Republic of China
| | - Chunxia Huang
- Department of Anesthesiology and Perioperative Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230001, People's Republic of China. .,Key Laboratory of Anesthesiology and Perioperative Medicine of Anhui Higher Education Institutes, Hefei, Anhui, People's Republic of China.
| | - Yan Yang
- Department of Pharmacology, School of Basic Medical Sciences, Key Laboratory of Anti-Inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230001, People's Republic of China.
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Resveratrol Mitigates Hippocampal Tau Acetylation and Cognitive Deficit by Activation SIRT1 in Aged Rats following Anesthesia and Surgery. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:4635163. [PMID: 33381265 PMCID: PMC7758127 DOI: 10.1155/2020/4635163] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 11/09/2020] [Accepted: 11/28/2020] [Indexed: 12/14/2022]
Abstract
Postoperative cognitive dysfunction (POCD) is a sever postsurgical neurological complication in the elderly population. As the global acceleration of population ageing, POCD is proved to be a great challenge to the present labor market and healthcare system. In the present study, our findings showed that tau acetylation mediated by SIRT1 deficiency resulted in tau hyperphosphorylation in the hippocampus of the aged POCD model and consequently contributed to cognitive impairment. Interestingly, pretreatment with resveratrol almost restored the expression of SIRT1, reduced the levels of acetylated tau and hyperphosphorylated tau in the hippocampus, and improved the cognitive performance in the behavioral tests. What is more, we observed that microglia-derived neuroinflammation resulting from SIRT1 inhibition in microglia probably aggravated the tau acetylation in cultured neurons in vitro. Our findings supported the notion that activation SIRT1 provided dually beneficial effect in the aged POCD model. Taken together, our findings provided the initial evidence that tau acetylation was associated with cognitive impairment in the aged POCD model and paved a promising avenue to prevent POCD by inhibiting tau acetylation in a SIRT1-dependent manner.
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Zabetian-Targhi F, Srikanth VK, Smith KJ, Oddy PhD WH, Beare R, Moran C, Wang W, Shivappa N, Hébert JR, Breslin M, van Weel JM, Callisaya ML. Associations Between the Dietary Inflammatory Index, Brain Volume, Small Vessel Disease, and Global Cognitive Function. J Acad Nutr Diet 2020; 121:915-924.e3. [PMID: 33339764 DOI: 10.1016/j.jand.2020.11.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 10/21/2020] [Accepted: 11/05/2020] [Indexed: 10/22/2022]
Abstract
BACKGROUND An inflammatory diet is related to poorer cognition, but the underlying brain pathways are unknown. OBJECTIVE The aim of this study was to examine associations between the Energy-Adjusted Dietary Inflammatory Index (E-DII) and brain volume, small vessel disease, and cognition in people with and without type 2 diabetes mellitus (T2DM). DESIGN This is a secondary cross-sectional analysis of data from the Cognition and Diabetes in Older Tasmanians study. PARTICIPANTS/SETTINGS This study included 641 participants (n = 326 with T2DM) enrolled between 2005 and 2011 from Tasmania, Australia. MAIN OUTCOME MEASURES The E-DII was computed from the 80-item Dietary Questionnaire for Epidemiological Studies, version 2. Brain volumes (gray matter, white matter, and white matter hyperintensities), infarcts, and microbleeds were obtained from magnetic resonance imaging. Global cognition was derived from a comprehensive battery of neuropsychological tests. STATISTICAL ANALYSIS Logistic and linear regressions were performed to examine associations between E-DII and brain measures and a global cognitive score, adjusting for demographics, energy, T2DM, mood, ambulatory activity, and cardiovascular risk factors. An E-DII × T2DM interaction term was tested in each model. RESULTS The mean (standard deviation) age of participants was 69.8 (7.4) years. There were no associations between the E-DII and any of the brain structural measures or global cognitive function in fully adjusted models. There was a modification effect for T2DM on the association between E-DII and gray matter volume (T2DM: β = 1.38, 95% CI -3.03 to 5.79; without T2DM: β = -4.34, 95% CI, -8.52 to -0.16), but not with any of the other outcome measures. CONCLUSIONS In this cross-sectional study, E-DII was not associated with brain structure or global cognition. In 1 of the 7 outcomes, a significant modification effect for T2DM was found for the associations between E-DII and gray matter. Future prospective studies are needed to clarify the associations between diet-related inflammation and brain health.
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Chen SM, Li M, Xie J, Li S, Xiang SS, Liu HY, Chen Z, Zhang P, Kuang X, Tang XQ. Hydrogen sulfide attenuates postoperative cognitive dysfunction through promoting the pathway of Warburg effect-synaptic plasticity in hippocampus. Toxicol Appl Pharmacol 2020; 409:115286. [PMID: 33068621 DOI: 10.1016/j.taap.2020.115286] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 10/01/2020] [Accepted: 10/12/2020] [Indexed: 01/03/2023]
Abstract
Postoperative cognitive dysfunction (POCD) is deemed to a severe surgical complication without effective treatment. Previous work has confirmed the important modulatory role of hydrogen sulfide (H2S) in cognitive function. This study was proposed to explore whether H2S relieves POCD and the possible mechanisms. We demonstrated that NaHS (a donor of H2S) reversed the inhibited endogenous H2S generation in the hippocampus of postoperative rats. NaHS attenuated the cognitive impairment of postoperative rats in the Y-maze, Novel object recognition, and Morris water maze tests. NaHS enhanced the expressions of synaptic plasticity-related proteins, synapsin-1 and PSD-95, increased the synaptic density, and decreased the destruction of synaptic structures in the hippocampus of postoperative rats. Moreover, NaHS promoted Warburg effect in the hippocampus of postoperative rats, as reflected by increases in the expressions of hexokinase 2, pyruvate kinase M2, lactate dehydrogenase A, and pyruvate dehydrogenase kinase 1, an enhancement in the content of lactate, and a reduction in the expression of pyruvate dehydrogenase. The inhibitor of Warburg effect, 2-Deoxy-D-glucose (2-DG), not only reversed NaHS-enhanced Warburg effect in the hippocampus of postoperative rats, but also significantly abolished NaHS-exerted protective effect on cognitive function. Furthermore, 2-DG reversed NaHS-exerted enhancement in the expressions of synapsin-1 and PSD-95, increase in the synaptic density, and decrease in the destruction of synaptic structures in the hippocampus of postoperative rats. Collectively, these results indicate that H2S alleviates POCD through enhancing hippocampal Warburg effect, which subsequently improves synaptic plasticity in the hippocampus.
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Affiliation(s)
- Si-Min Chen
- Institute of Neurology, the First Affiliated Hospital, University of South China, Hengyang 421001, Hunan, PR China; Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang 421001, Hunan, PR China
| | - Min Li
- Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang 421001, Hunan, PR China; Department of Neurology, Affiliated Nanhua Hospital, University of South China, Hengyang 421001, Hunan, PR China
| | - Juan Xie
- Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang 421001, Hunan, PR China; Department of Neurology, Affiliated Nanhua Hospital, University of South China, Hengyang 421001, Hunan, PR China
| | - Sha Li
- Institute of Neurology, the First Affiliated Hospital, University of South China, Hengyang 421001, Hunan, PR China; Department of Anesthesiology, the First Affiliated Hospital, University of South China, Hengyang 421001, Hunan, PR China
| | - Shi-Shi Xiang
- Institute of Neurology, the First Affiliated Hospital, University of South China, Hengyang 421001, Hunan, PR China; Department of Anesthesiology, the First Affiliated Hospital, University of South China, Hengyang 421001, Hunan, PR China
| | - Hai-Yao Liu
- Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang 421001, Hunan, PR China; Department of Neurology, Affiliated Nanhua Hospital, University of South China, Hengyang 421001, Hunan, PR China
| | - Zhuo Chen
- Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang 421001, Hunan, PR China; Department of Neurology, Affiliated Nanhua Hospital, University of South China, Hengyang 421001, Hunan, PR China
| | - Ping Zhang
- Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang 421001, Hunan, PR China; Department of Neurology, Affiliated Nanhua Hospital, University of South China, Hengyang 421001, Hunan, PR China.
| | - Xin Kuang
- Institute of Neurology, the First Affiliated Hospital, University of South China, Hengyang 421001, Hunan, PR China; Department of Anesthesiology, the First Affiliated Hospital, University of South China, Hengyang 421001, Hunan, PR China
| | - Xiao-Qing Tang
- Institute of Neurology, the First Affiliated Hospital, University of South China, Hengyang 421001, Hunan, PR China; Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang 421001, Hunan, PR China.
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Shi J, Zou X, Jiang K, Wang F. SIRT1 mediates improvement of cardiac surgery-induced postoperative cognitive dysfunction via the TLR4/NF-κB pathway. World J Biol Psychiatry 2020; 21:757-765. [PMID: 31418620 DOI: 10.1080/15622975.2019.1656820] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
OBJECTIVES Clinically, there is no effective therapy for postoperative cognitive dysfunction (POCD). Inflammation after surgery is closely associated with POCD. METHODS In this study, we explored the role of sirtuin 1 (SIRT1) in POCD. POCD in mice was induced by cardiac surgery. The mRNA and protein levels of related genes were determined by real-time polymerase chain reaction and western blot, respectively. Plasma concentrations of inflammatory factors were measured using an ELISA kit. Novel object and novel location recognition tests were carried out to measure recognition ability. The Morris water maze (MWM) test was performed to measure learning and memory ability. RESULTS There was a clear decrease in SIRT1 expression after POCD. The SIRT1 activator SRT1720 promoted recognition, learning, and memory ability of mice with POCD. Moreover, SRT1720 treatment greatly inhibited plasma inflammatory cytokine levels and TLR4 and P65 protein expression in the hippocampus of POCD mice. The effect of SRT1720 on POCD was in a TLR4-dependent manner. CONCLUSIONS SIRT1 mediates the improvement of cardiac surgery-induced postoperative cognitive dysfunction via the TLR4/NF-κB pathway.
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Affiliation(s)
- Jing Shi
- The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Xiaohua Zou
- The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Ke Jiang
- The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Feng Wang
- The Affiliated Hospital of Guizhou Medical University, Guiyang, China
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Glycogen Synthase Kinase 3 β Promotes Postoperative Cognitive Dysfunction by Inducing the M1 Polarization and Migration of Microglia. Mediators Inflamm 2020; 2020:7860829. [PMID: 33354162 PMCID: PMC7735842 DOI: 10.1155/2020/7860829] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 10/05/2020] [Accepted: 10/28/2020] [Indexed: 01/01/2023] Open
Abstract
Postoperative cognitive dysfunction (POCD) is a common postoperative central nervous system complication, especially in the elderly. It has been consistently reported that the pathological process of this clinical syndrome is related to neuroinflammation and microglial proliferation. Glycogen synthase kinase 3β (GSK-3β) is a widely expressed kinase with distinct functions in different types of cells. The role of GSK-3β in regulating innate immune activation has been well documented, but as far as we know, its role in POCD has not been fully elucidated. Lithium chloride (LiCl) is a widely used inhibitor of GSK-3β, and it is also the main drug for the treatment of bipolar disorder. Prophylactic administration of lithium chloride (2 mM/kg) can inhibit the expression of proinflammatory mediators in the hippocampus, reduce the hippocampal expression of NF-κB, and increase both the downregulation of M1 microglial-related genes (inducible nitric oxide synthase and CD86) and upregulation of M2 microglial-related genes (IL-10 and CD206), to alleviate the cognitive impairment caused by orthopedic surgery. In vitro, LiCl reversed LPS-induced production of proinflammatory mediators and M1 polarization of microglia. To sum up these results, GSK-3β is a key contributor to POCD and a potential target of neuroprotective strategies.
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Schmidt AP, Carmona MJC. [Serum biomarkers of brain injury: S100B protein, cognitive dysfunction, and major non-cardiac surgery]. Rev Bras Anestesiol 2020; 70:570-572. [PMID: 33279228 DOI: 10.1016/j.bjan.2020.10.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/09/2020] [Indexed: 10/23/2022] Open
Affiliation(s)
- André P Schmidt
- Hospital de Clínicas de Porto Alegre (HCPA), Serviço de Anestesia e Medicina Perioperatória, Porto Alegre, RS, Brazil; Universidade Federal do Rio Grande do Sul (UFRGS), Instituto de Ciências Básicas da Saúde (ICBS), Departamento de Bioquímica, Porto Alegre, RS, Brazil; Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Santa Casa de Porto Alegre, Serviço de Anestesia, Porto Alegre, RS, Brazil; Hospital Nossa Senhora da Conceição, Serviço de Anestesia, Porto Alegre, RS, Brazil; Universidade Federal do Rio Grande do Sul (UFRGS), Faculdade de Medicina, Programa de Pós-Graduação em Ciências Pneumológicas, Porto Alegre, RS, Brazil.
| | - Maria José C Carmona
- Disciplina de Anestesiologia, Departamento de Cirurgia, Faculdade de Medicina, Universidade de São Paulo (USP), São Paulo, SP, Brazil
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Serum biomarkers of brain injury: S100B protein, cognitive dysfunction, and major non-cardiac surgery. BRAZILIAN JOURNAL OF ANESTHESIOLOGY (ENGLISH EDITION) 2020. [PMID: 33279228 PMCID: PMC9373292 DOI: 10.1016/j.bjane.2020.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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65
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Liu PF, Gao T, Li TZ, Yang YT, Xu YX, Xu ZP, Mi WD. Repeated propofol exposure-induced neuronal damage and cognitive impairment in aged rats by activation of NF-κB pathway and NLRP3 inflammasome. Neurosci Lett 2020; 740:135461. [PMID: 33115643 DOI: 10.1016/j.neulet.2020.135461] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 09/25/2020] [Accepted: 10/20/2020] [Indexed: 11/26/2022]
Abstract
BACKGROUND Elderly patients receive propofol at regular intervals for sedation during gastrointestinal endoscopy. However, the link between cognition and intermittent propofol exposure remains unclear. Thus, we used aged rats to investigate the effect of propofol on cognition. METHODS The study included two parts. In the first part, aged (18-20 months old) male Sprague-Dawley rats underwent intermittent intraperitoneal injection of propofol (200 mg/kg) or intralipid, every 9 days or once a day. In the second part, some aged rats received intraperitoneal injection of Bay 11-7082 (1 mg/kg), a specific inhibitor of NF-κB, 30 min before propofol injection. Memory tests were performed to evaluate cognition 24 h after the entire treatment. The hippocampal neuronal damage was assessed by TUNEL staining. The hippocampal levels of p-NF-κB p65, NLRP3, caspase-1 p20, and cleaved caspase-3 were detected by western blotting. The hippocampal and serum levels of IL-1β, IL-6, and TNF-α were evaluated using ELISA. RESULTS There were no differences in the behavioral tests, hippocampal neuronal damage, and neuroinflammation between groups given intralipid and propofol treatment every 9 days. However, repeated propofol treatment once a day promoted activation of NF-κB and the NLRP3 inflammasome, inducing cognitive impairment and neuroinflammation. Interestingly, pretreatment with Bay-11-7082 not only inhibited NF-κB/NLRP3 inflammasome activation, but also attenuated neuronal damage and cognitive dysfunction in aged rats exposed to daily propofol treatment. CONCLUSIONS Intermittent propofol treatment every 9 days may be safe for aged rats. However, propofol treatment once a day could impair the cognition of aged rats, partly through the activation of the NF-κB pathway and NLRP3 inflammasome, which may be a potential targets for the treatment of cognitive impairment in elderly patients.
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Affiliation(s)
- Peng-Fei Liu
- Anesthesia and Operation Center, the First Medical Center, Chinese PLA General Hospital, 28th Fuxing Road, Haidian District, Beijing 100853, China; Department of Anesthesiology, Beijing Shijitan Hospital, Capital Medical University, 10th Tieyi Road, Haidian District, Beijing, 100038, China
| | - Teng Gao
- Department of Anesthesiology, Beijing Shijitan Hospital, Capital Medical University, 10th Tieyi Road, Haidian District, Beijing, 100038, China
| | - Tian-Zuo Li
- Department of Anesthesiology, Beijing Shijitan Hospital, Capital Medical University, 10th Tieyi Road, Haidian District, Beijing, 100038, China
| | - Yi-Tian Yang
- Anesthesia and Operation Center, the First Medical Center, Chinese PLA General Hospital, 28th Fuxing Road, Haidian District, Beijing 100853, China
| | - Yong-Xing Xu
- Department of Nephrology, Chinese PLA Strategic Support Force Characteristic Medical Center, 9th AnXiangBeiLi Road, Beijing, 100101, China
| | - Zhi-Peng Xu
- Anesthesia and Operation Center, the First Medical Center, Chinese PLA General Hospital, 28th Fuxing Road, Haidian District, Beijing 100853, China.
| | - Wei-Dong Mi
- Anesthesia and Operation Center, the First Medical Center, Chinese PLA General Hospital, 28th Fuxing Road, Haidian District, Beijing 100853, China.
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66
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Tasbihgou SR, Dijkstra S, Atmosoerodjo SD, Tigchelaar I, Huet R, Mariani MA, Absalom AR. A prospective pilot study assessing levels of preoperative physical activity and postoperative neurocognitive disorder among patients undergoing elective coronary artery bypass graft surgery. PLoS One 2020; 15:e0240128. [PMID: 33048965 PMCID: PMC7553306 DOI: 10.1371/journal.pone.0240128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 09/20/2020] [Indexed: 11/17/2022] Open
Abstract
Physical inactivity and a sedentary lifestyle are associated with a chronic low-level inflammatory state which has been implicated in the pathogenesis of cardiovascular disease. There is growing interest in exercise programs as part of surgical ‘prehabilitation’. We therefore studied preoperative physical activity levels of patients undergoing elective Coronary Artery Bypass Graft (CABG) surgery, and performed an exploratory analysis of the influence of physical activity on postoperative outcome. The Short Questionnaire to Assess Health (SQUASH) was used to assess physical activity among 100 patients, of mean (SD) age 65.4 (7.6) years. Additionally, handgrip strength was measured, and the get-up-and-go test was conducted. Anxiety, depression, and quality of life were assessed, and a computerised cognitive test battery was used to assess cognitive performance preoperatively, and three months after surgery. Preoperatively, 76% of patients met the recommended national guidelines for physical activity. The incidence of pre-existing medical conditions, and other pre-operative patient features were similar in active and inactive patients. Preoperative physical activity was significantly inversely related to the logistic EuroSCORE. The level of physical activity was also significantly inversely related with preoperative C-reactive protein (CRP) and peak postoperative CRP, but physical activity did not appear to be associated with any adverse postoperative outcomes or extended length of hospital stay. The incidence of postoperative neurocognitive disorder (PNCD) at 3 months postoperatively was 26%. Cognitive performance was not related with physical activity levels. In summary, this was the first study to assess activity levels of cardiac surgical patients with the SQUASH questionnaire. The majority of patients were physically active. Although physical activity was associated with lower levels of inflammation in this pilot study, it was not associated with an improved clinical or cognitive postoperative outcome.
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Affiliation(s)
- Setayesh R Tasbihgou
- Department of Anesthesiology, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
| | - Sandra Dijkstra
- Department of Cardiothoracic Surgery, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
| | - Sawal D Atmosoerodjo
- Department of Anesthesiology, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
| | - Iris Tigchelaar
- Laboratory for Experimental Ophthalmology, University Medical Centre Groningen, Groningen, The Netherlands
| | - Rolf Huet
- Department of Anesthesiology, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
| | - Massimo A Mariani
- Department of Cardiothoracic Surgery, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
| | - Anthony R Absalom
- Department of Anesthesiology, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
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Han D, Li Z, Liu T, Yang N, Li Y, He J, Qian M, Kuang Z, Zhang W, Ni C, Guo X. Prebiotics Regulation of Intestinal Microbiota Attenuates Cognitive Dysfunction Induced by Surgery Stimulation in APP/PS1 Mice. Aging Dis 2020; 11:1029-1045. [PMID: 33014520 PMCID: PMC7505279 DOI: 10.14336/ad.2020.0106] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 01/06/2020] [Indexed: 12/15/2022] Open
Abstract
Emerging evidence indicates that the intestinal microbiota could interact with the central nervous system and modulate multiple pathophysiological changes, including the integrity of intestinal barrier and blood-brain barrier, as well as neuroinflammatory response. In the present study, we investigated the potential role of intestinal microbiota in the pathophysiological process of postoperative cognitive dysfunction. Six-month-old APP/PS1 mice were subjected to partial hepatectomy to establish surgery model and exhibited cognitive dysfunction. The expressions of inflammatory mediators increased and tight junction proteins (ZO-1 and Occludin) levels decreased in the intestine and hippocampus. The 16S ribosomal RNA gene sequencing showed altered β diversity and intestinal microbiota richness after surgery, including genus Rodentibacter, Bacteroides, Ruminococcaceae_UCG_014 and Faecalibaculum, as well as family Eggerthellaceae and Muribaculaceae. Furthermore, prebiotics (Xylooligosaccharides, XOS) intervention effectively attenuated surgery-induced cognitive dysfunction and intestinal microbiota alteration, reduced inflammatory responses, and improved the integrity of tight junction barrier in the intestine and hippocampus. In summary, the present study indicates that intestinal microbiota alteration, the related intestinal barrier and blood-brain barrier damage, and inflammatory responses participate the pathophysiological process of postoperative cognitive dysfunction. Prebiotics intervention could be a potential preventative approach.
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Affiliation(s)
- Dengyang Han
- 1Department of Anesthesiology, Peking University Third Hospital, Beijing, China
| | - Zhengqian Li
- 1Department of Anesthesiology, Peking University Third Hospital, Beijing, China
| | - Taotao Liu
- 1Department of Anesthesiology, Peking University Third Hospital, Beijing, China
| | - Ning Yang
- 1Department of Anesthesiology, Peking University Third Hospital, Beijing, China
| | - Yue Li
- 1Department of Anesthesiology, Peking University Third Hospital, Beijing, China
| | - Jindan He
- 1Department of Anesthesiology, Peking University Third Hospital, Beijing, China
| | - Min Qian
- 1Department of Anesthesiology, Peking University Third Hospital, Beijing, China
| | - Zhongshen Kuang
- 1Department of Anesthesiology, Peking University Third Hospital, Beijing, China
| | - Wen Zhang
- 2National Institute on Drug Dependence and Beijing Key Laboratory of Drug Dependence, Peking University, Beijing, China
| | - Cheng Ni
- 1Department of Anesthesiology, Peking University Third Hospital, Beijing, China
| | - Xiangyang Guo
- 1Department of Anesthesiology, Peking University Third Hospital, Beijing, China
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Acosta-Murillo NR. Delirio en niños críticamente enfermos. REVISTA DE LA FACULTAD DE MEDICINA 2020. [DOI: 10.15446/revfacmed.v68n4.77430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
El delirio en pacientes críticos es una condición médica que afecta tanto a adultos como a niños; en ambas poblaciones implica graves complicaciones como estancia hospitalaria prolongada, alto riesgo de muerte y deterioro cognitivo a largo plazo, así como mayores costos económicos en cuanto a la prestación de servicios de salud. La principal dificultad de esta condición en la población pediátrica es su adecuado reconocimiento, ya que puede presentarse en edades muy tempranas, incluso en niños lactantes, cuando sus signos y síntomas pueden confundirse o superponerse con otras patologías, tales como el síndrome de abstinencia. En consecuencia, en estos casos el uso de herramientas diagnósticas puede ser una labor compleja que implica múltiples dificultades.Antes de 2011 no había muchos estudios que abordaran la evaluación del delirio en niños. Sin embargo, ese mismo año se estableció la primera escala desarrollada específicamente para el monitoreo de pacientes en unidades de cuidado intensivo pediátrico, lo que llevó a un aumento significativos del número de casos de delirio en niños menores de 5 años críticamente enfermos; esta situación hizo que los pediatras se interesaran más en estudiar esta importante patología.La presente reflexión, basada en una revisión de la literatura, busca actualizar el amplio espectro fisiopatológico del delirio en niños críticamente enfermos y, de esta forma, mejorar su tamizaje, diagnóstico e intervenciones terapéuticas tempranas en todas las edades pediátricas, incluso en menores de 5 años.
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69
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Xie S, Yu L, Zhou M, Liu L, Lei D, Han C. Association between BDNF rs6265 polymorphisms and postoperative cognitive dysfunction in Chinese Han Population. Brain Behav 2020; 10:e01800. [PMID: 33405375 PMCID: PMC7559622 DOI: 10.1002/brb3.1800] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 07/15/2020] [Accepted: 07/21/2020] [Indexed: 12/17/2022] Open
Abstract
INTRODUCTION Brain-derived neurotrophic factor (BDNF) plays a critical role in the pathogenesis of postoperative cognitive dysfunction (POCD). In present study, we aimed to assess the possible association between POCD and BDNF rs6265 polymorphisms. METHODS 124 patients aged 60 years or older scheduled for elective surgery under general anesthesia and 25 age- and gender-matched healthy volunteers were recruited. POCD was identified using a neuropsychological test battery administered preoperatively, 7 days, and 3 months after surgery. Genotyping of rs6265 was performed using polymerase chain reaction amplification and restriction fragment length polymorphism analysis. RESULTS 99 patients and 25 healthy controls were finally enrolled in the analysis. 29(29.3%) and 18(18.2%) of 99 patients had POCD at 7 days and 3 months after surgery, respectively. The patients carrying a G allele at the rs6265 locus showed a lower risk for POCD than an A allele carriers on postoperative 7 days, but not 3 months after surgery (OR = 0.67; 95% CI: 0.47-0.96; p = .017; OR = 0.69; 95% CI: 0.42-1.13; p = .14, respectively). The risk of POCD at 7 days following surgery was significantly lower in additive model (OR = 0.41; 95% CI: 0.2-0.84; p = .015) and dominant model (OR = 0.35; 95% CI: 0.13-0.96; p = .042). CONCLUSION We tentatively demonstrate that BDNF rs6265 polymorphisms might be associated with occurrence of POCD at 7 days after surgery and the A > G mutant at the rs6265 locus be likely a protective factor for early POCD in Chinese Han population.
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Affiliation(s)
- Songhui Xie
- Department of Anesthesiology, The Affiliated Yixing Hospital of Jiangsu University, Yixing, China
| | - Lu Yu
- Department of Anesthesiology, The Affiliated Yixing Hospital of Jiangsu University, Yixing, China.,Yixing Clinical College, Medical College of Yangzhou University, Yixing, China
| | - Mingming Zhou
- Department of Anesthesiology, The Affiliated Yixing Hospital of Jiangsu University, Yixing, China.,Yixing Clinical College, Medical College of Yangzhou University, Yixing, China
| | - Li Liu
- Department of Anesthesiology, The Affiliated Yixing Hospital of Jiangsu University, Yixing, China.,Yixing Clinical College, Medical College of Yangzhou University, Yixing, China
| | - Daoyun Lei
- Department of Anesthesiology, The Affiliated Yixing Hospital of Jiangsu University, Yixing, China
| | - Chao Han
- Department of Anesthesiology, The Affiliated Yixing Hospital of Jiangsu University, Yixing, China.,Yixing Clinical College, Medical College of Yangzhou University, Yixing, China
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Baicalin Ameliorates Cognitive Impairment and Protects Microglia from LPS-Induced Neuroinflammation via the SIRT1/HMGB1 Pathway. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:4751349. [PMID: 33029280 PMCID: PMC7527898 DOI: 10.1155/2020/4751349] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 08/20/2020] [Accepted: 09/04/2020] [Indexed: 12/16/2022]
Abstract
Systemic inflammation often induces neuroinflammation and disrupts neural functions, ultimately causing cognitive impairment. Furthermore, neuronal inflammation is the key cause of many neurological conditions. It is particularly important to develop effective neuroprotectants to prevent and control inflammatory brain diseases. Baicalin (BAI) has a wide variety of potent neuroprotective and cognitive enhancement properties in various models of neuronal injury through antioxidation, anti-inflammation, anti-apoptosis, and stimulating neurogenesis. Nevertheless, it remains unclear whether BAI can resolve neuroinflammation and cognitive decline triggered by systemic or distant inflammatory processes. In the present study, intraperitoneal lipopolysaccharide (LPS) administration was used to establish neuroinflammation to evaluate the potential neuroprotective and anti-inflammatory effects of BAI. Here, we report that BAI activated silent information regulator 1 (SIRT1) to deacetylate high-mobility group box 1 (HMGB1) protein in response to acute LPS-induced neuroinflammation and cognitive deficits. Furthermore, we demonstrated the anti-inflammatory and cognitive enhancement effects and the underlying molecular mechanisms of BAI in modulating microglial activation and systemic cytokine production, including tumor necrosis factor- (TNF-) α and interleukin- (IL-) 1β, after LPS exposure in mice and in the microglial cell line, BV2. In the hippocampus, BAI not only reduced reactive microglia and inflammatory cytokine production but also modulated SIRT1/HMGB1 signaling in microglia. Interestingly, pretreatment with SIRT1 inhibitor EX-527 abolished the beneficial effects of BAI against LPS exposure. Specifically, BAI treatment inhibited HMGB1 release via the SIRT1/HMGB1 pathway and reduced the nuclear translocation of HMGB1 in LPS-induced BV2 cells. These effects were reversed in BV2 cells by silencing endogenous SIRT1. Taken together, these findings indicated that BAI reduced microglia-associated neuroinflammation and improved acute neurocognitive deficits in LPS-induced mice via SIRT1-dependent downregulation of HMGB1, suggesting a possible novel protection against acute neurobehavioral deficits, such as delayed neurocognitive recovery after anesthesia and surgery challenges.
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Zhao S, Chen F, Wang D, Han W, Zhang Y, Yin Q. NLRP3 inflammasomes are involved in the progression of postoperative cognitive dysfunction: from mechanism to treatment. Neurosurg Rev 2020; 44:1815-1831. [PMID: 32918635 DOI: 10.1007/s10143-020-01387-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 08/25/2020] [Accepted: 09/03/2020] [Indexed: 12/15/2022]
Abstract
Postoperative cognitive dysfunction (POCD) involves patient memory and learning decline after surgery. POCD not only presents challenges for postoperative nursing and recovery but may also cause permanent brain damage for patients, including children and the aged, with vulnerable central nervous systems. Its occurrence is mainly influenced by surgical trauma, anesthetics, and the health condition of the patient. There is a lack of imaging and experimental diagnosis; therefore, patients can only be diagnosed by clinical observation, which may underestimate the morbidity, resulting in decreased treatment efficacy. Except for symptomatic support therapy, there is a relative lack of effective drugs specific for the treatment of POCD, because the precise mechanism of POCD remains to be determined. One current hypothesis is that postoperative inflammation promotes the progression of POCD. Accumulating research has indicated that overactivation of NOD-, LRR- and pyrin domain-containing protein 3 (NLRP3) inflammasomes contribute to the POCD progression, suggesting that targeting NLRP3 inflammasomes may be an effective therapy to treat POCD. In this review, we summarize recent studies and systematically describe the pathogenesis, treatment progression, and potential treatment options of targeting NLRP3 inflammasomes in POCD patients.
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Affiliation(s)
- Shuai Zhao
- Department of Anesthesiology, First Hospital of Jilin University, 71 Xinmin Avenue, Changchun, 130021, China
| | - Fan Chen
- Department of Neurosurgery, University of Medicine Greifswald, Greifswald, Germany
| | - Dunwei Wang
- Department of Anesthesiology, First Hospital of Jilin University, 71 Xinmin Avenue, Changchun, 130021, China
| | - Wei Han
- Department of Anesthesiology, First Hospital of Jilin University, 71 Xinmin Avenue, Changchun, 130021, China
| | - Yuan Zhang
- Department of Anesthesiology, First Hospital of Jilin University, 71 Xinmin Avenue, Changchun, 130021, China.
| | - Qiliang Yin
- Department of Oncology, First Hospital of Jilin University, Changchun, China.
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72
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Preoperative Chronic and Acute Pain Affects Postoperative Cognitive Function Mediated by Neurotransmitters. J Mol Neurosci 2020; 71:515-526. [PMID: 32901371 DOI: 10.1007/s12031-020-01673-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Accepted: 07/20/2020] [Indexed: 02/08/2023]
Abstract
The effective prevention of postoperative cognitive dysfunction (POCD) needs to be explored, and the effect of preoperative pain on POCD remains unclear. We established a chronic pain model induced by chronic constriction injury (CCI) and models of acute pain and anxiety without pain in mice that were subsequently subjected to partial hepatectomy surgery. Morris water maze (MWM) tests were performed to evaluate the learning and memory abilities of the mice. ELISA was used to measure IL-1β, IL-6, and TNF-α in serum, and HPLC-MS was used to detect neurotransmitters in the prefrontal cortices and hippocampi of the mice. The results indicated that chronic pain induced by CCI might have significantly impaired the learning and memory abilities of mice, while acute pain and anxiety without pain only affected the memory abilities of mice. Perioperative acute pain increased the level of IL-1β in serum, and CCI might have increased the level of IL-6. CCI and acute pain increased dopamine (DA) levels in the cortex, similar to anxiety. Like anxiety, CCI increased 5-hydroxytryptamine (5-HT) levels in the prefrontal cortex and hippocampus. Acute pain led to a decrease in the acetylcholine (ACH) level in the hippocampus. Our results suggest that acute pain and CCI-induced chronic pain might aggravate postoperative cognitive dysfunction via neurotransmitters and by changing the levels of inflammatory factors such as IL-1β and IL-6.
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73
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Zuo Y, Yin L, Cheng X, Li J, Wu H, Liu X, Gu E, Wu J. Elamipretide Attenuates Pyroptosis and Perioperative Neurocognitive Disorders in Aged Mice. Front Cell Neurosci 2020; 14:251. [PMID: 32903868 PMCID: PMC7439217 DOI: 10.3389/fncel.2020.00251] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Accepted: 07/20/2020] [Indexed: 12/16/2022] Open
Abstract
Pyroptosis is a recently characterized inflammatory form of programmed cell death that is thought to be involved in the pathogenesis of perioperative neurocognitive disorders (PND). Elamipretide (SS-31), a mitochondrial-targeted peptide with multiple pharmacological properties, including anti-inflammatory activity, has been demonstrated to protect against many neurological diseases. However, the effect of elamipretide on pyroptosis in PND has not been studied. We established an animal model of PND by performing an exploratory laparotomy on mice under isoflurane anesthesia and examined the effects of elamipretide on cognitive function, synaptic integrity, neuroinflammation, mitochondrial function, and signaling controlling pyroptosis. Our results showed that anesthesia and surgery caused mitochondrial dysfunction and abnormal morphology, activation of canonicalnod-like receptor pyrin domain-containing 3 (NLRP3) inflammasome-caspase-1 dependent pyroptosis, and downregulation of synaptic integrity-related proteins in the hippocampus in aged mice, thus leading to learning and memory deficits in behavioral tests. Remarkably, treatment with the mitochondrial-targeted peptide elamipretide not only had protective effects against mitochondrial dysfunction but also attenuated surgery-induced pyroptosis and cognitive deficits. Our results provide a promising strategy for the treatment of PND involving mitochondrial dysfunction and pyroptosis.
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Affiliation(s)
- Youmei Zuo
- Department of Anesthesiology, First Affiliated Hospital of Anhui Medical University, Hefei, China.,Key Laboratory of Anesthesiology and Perioperative Medicine of Anhui Higher Education Institutes, Anhui Medical University, Hefei, China
| | - Lei Yin
- Department of Anesthesiology, Subei People's Hospital of Jiangsu Province, Yangzhou, China
| | - Xinqi Cheng
- Department of Anesthesiology, First Affiliated Hospital of Anhui Medical University, Hefei, China.,Key Laboratory of Anesthesiology and Perioperative Medicine of Anhui Higher Education Institutes, Anhui Medical University, Hefei, China
| | - Jun Li
- Department of Anesthesiology, First Affiliated Hospital of Anhui Medical University, Hefei, China.,Key Laboratory of Anesthesiology and Perioperative Medicine of Anhui Higher Education Institutes, Anhui Medical University, Hefei, China
| | - Hao Wu
- Department of Anesthesiology, First Affiliated Hospital of Anhui Medical University, Hefei, China.,Key Laboratory of Anesthesiology and Perioperative Medicine of Anhui Higher Education Institutes, Anhui Medical University, Hefei, China
| | - Xuesheng Liu
- Department of Anesthesiology, First Affiliated Hospital of Anhui Medical University, Hefei, China.,Key Laboratory of Anesthesiology and Perioperative Medicine of Anhui Higher Education Institutes, Anhui Medical University, Hefei, China
| | - Erwei Gu
- Department of Anesthesiology, First Affiliated Hospital of Anhui Medical University, Hefei, China.,Key Laboratory of Anesthesiology and Perioperative Medicine of Anhui Higher Education Institutes, Anhui Medical University, Hefei, China
| | - Jing Wu
- Jiangsu Key Laboratory of Molecular Medicine, Medical School of Nanjing University, Nanjing, China
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74
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Oberman K, Gouweleeuw L, Hoogerhout P, Eisel ULM, van Riet E, Schoemaker RG. Vaccination Prevented Short-Term Memory Loss, but Deteriorated Long-Term Spatial Memory in Alzheimer's Disease Mice, Independent of Amyloid-β Pathology. J Alzheimers Dis Rep 2020; 4:261-280. [PMID: 32904788 PMCID: PMC7458552 DOI: 10.3233/adr-200213] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Background: Soluble oligomeric amyloid-β (Aβ), rather than Aβ plaques, seems to be the culprit in Alzheimer’s disease (AD). Accordingly, a new concept vaccine of small cyclic peptide conjugates, selectively targeting oligomeric Aβ, has been developed. Objective: Study the therapeutic potential of this new vaccine in a mouse model for AD. Methods: J20 mice, overexpressing human amyloid precursor protein, were validated for an AD-like phenotype. Then, J20 mice were vaccinated at 2, 3, and 4 months of age and AD phenotype was evaluated at 6, 9, and 12 months of age; or at 9, 10, and 11 months with evaluation at 12 months. Effects on Aβ pathology were studied by plaque load (immunohistochemistry; 6E10) and antibody titers against Aβ (ELISA). AD behavioral phenotype was evaluated by performance in a battery of cognitive tests. Results: J20 mice displayed age-related Aβ plaque development and an AD-like behavioral phenotype. A consistent antibody response to the cyclic peptides was, however, not extended to Aβ, leaving plaque load unaffected. Nevertheless, immunization at young ages prevented working- and short-term spatial memory loss, but deteriorated long-term spatial learning and memory, at 12 months of age. Immunization at later ages did not affect any measured parameter. Conclusion: J20 mice provide a relevant model for AD to study potential anti-Aβ treatment. Early vaccination prevented short-term memory loss at later ages, but deteriorated long-term spatial memory, however without affecting Aβ pathology. Later vaccination had no effects, but optimal timing may require further investigation.
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Affiliation(s)
- Klaske Oberman
- Department of Neurobiology GELIFES, University Groningen, The Netherlands
| | - Leonie Gouweleeuw
- Department of Neurobiology GELIFES, University Groningen, The Netherlands
| | | | - Ulrich L M Eisel
- Department of Neurobiology GELIFES, University Groningen, The Netherlands
| | | | - Regien G Schoemaker
- Department of Neurobiology GELIFES, University Groningen, The Netherlands.,University Medical Center Groningen, The Netherlands
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75
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Chen YN, Sha HH, Wang YW, Zhou Q, Bhuiyan P, Li NN, Qian YN, Dong HQ. Histamine 2/3 receptor agonists alleviate perioperative neurocognitive disorders by inhibiting microglia activation through the PI3K/AKT/FoxO1 pathway in aged rats. J Neuroinflammation 2020; 17:217. [PMID: 32698899 PMCID: PMC7374916 DOI: 10.1186/s12974-020-01886-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 07/03/2020] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Microglia, the principal sentinel immune cells of the central nervous system (CNS), play an extensively vital role in neuroinflammation and perioperative neurocognitive disorders (PND). Histamine, a potent mediator of inflammation, can both promote and prevent microglia-related neuroinflammation by activating different histamine receptors. Rat microglia express four histamine receptors (H1R, H2R, H3R, and H4R), among which the histamine 1 and 4 receptors can promote microglia activation, whereas the role and cellular mechanism of the histamine 2 and 3 receptors have not been elucidated. Therefore, we evaluated the effects and potential cellular mechanisms of histamine 2/3 receptors in microglia-mediated inflammation and PND. METHODS This study investigated the role of histamine 2/3 receptors in microglia-induced inflammation and PND both in vivo and in vitro. In the in vivo experiments, rats were injected with histamine 2/3 receptor agonists in the right lateral ventricle and were then subjected to exploratory laparotomy. In the in vitro experiments, primary microglia were pretreated with histamine 2/3 receptor agonists before stimulation with lipopolysaccharide (LPS). Cognitive function, microglia activation, proinflammatory cytokine production, NF-κb expression, M1/M2 phenotypes, cell migration, and Toll-like receptor-4 (TLR4) expression were assessed. RESULTS In our study, the histamine 2/3 receptor agonists inhibited exploratory laparotomy- or LPS-induced cognitive decline, microglia activation, proinflammatory cytokine production, NF-κb expression, M1/M2 phenotype transformation, cell migration, and TLR4 expression through the PI3K/AKT/FoxO1 pathway. CONCLUSION Based on our findings, we conclude that histamine 2/3 receptors ameliorate PND by inhibiting microglia activation through the PI3K/AKT/FoxO1 pathway. Our results highlight histamine 2/3 receptors as potential therapeutic targets to treat neurological conditions associated with PND.
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Affiliation(s)
- Yi-Nan Chen
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, People's Republic of China
| | - Huan-Huan Sha
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, People's Republic of China
| | - Yi-Wei Wang
- Department of Anesthesiology, Wuxi People's Hospital, Wuxi, 214001, Jiangsu, People's Republic of China
| | - Qin Zhou
- Department of Anesthesiology, Jiangsu Cancer Hospital, Nanjing, 210009, Jiangsu, People's Republic of China
| | - Piplu Bhuiyan
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, People's Republic of China
| | - Na-Na Li
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, People's Republic of China
| | - Yan-Ning Qian
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, People's Republic of China
| | - Hong-Quan Dong
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, People's Republic of China.
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76
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Zhou XY, Liu J, Xu ZP, Fu Q, Wang PQ, Wang JH, Zhang H. Dexmedetomidine ameliorates postoperative cognitive dysfunction by inhibiting Toll-like receptor 4 signaling in aged mice. Kaohsiung J Med Sci 2020; 36:721-731. [PMID: 32627922 DOI: 10.1002/kjm2.12234] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Revised: 04/11/2020] [Accepted: 04/26/2020] [Indexed: 11/11/2022] Open
Abstract
Our study aimed to explore the molecular mechanisms involved in the improvement of postoperative cognitive dysfunction (POCD) by dexmedetomidine (DEX). BV2 microglia cells were cultured under normal condition, DEX exposure (0.1 μg/mL), and lipopolysacchride (LPS) treatment (0.1 μg/mL) or with pretreatment of DEX before LPS incubation. For BV2 microglia cells, LPS induced markedly increased release of pro-inflammatory cytokines (interleukin [IL]-1β, IL-6, and tumor necrosis factor-alpha [TNF-α]) and expressions of Toll-like receptor 4 (TLR4) and nuclear factor kappa B (NF-κB), while DEX pretreatment inhibited the LPS-induced production of pro-inflammatory cytokines and expressions of TLR4 and NF-κB. The spatial memory function was impaired in the aged mice following partial hepatectomy since the percentage of time spent in the target quadrant and the number of crossings over the former platform location were reduced. Pretreatment of DEX may attenuate neuroinflammation and improve POCD in aged mice through inhibiting the TLR4-NF-κB signaling pathway in the hippocampus.
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Affiliation(s)
- Xue-Yue Zhou
- School of Clinical Medicine, Tsinghua University, Beijing, China.,Department of Anesthesiology, Beijing Tsinghua Changgung Hospital, Beijing, China
| | - Jing Liu
- Anesthesia and Operation Center, Chinese PLA General Hospital, Beijing, China
| | - Zhi-Peng Xu
- Anesthesia and Operation Center, Chinese PLA General Hospital, Beijing, China
| | - Qiang Fu
- Anesthesia and Operation Center, Chinese PLA General Hospital, Beijing, China
| | - Pei-Qi Wang
- Anesthesia and Operation Center, Chinese PLA General Hospital, Beijing, China
| | - Jing-Hua Wang
- Department of Anesthesiology, The 305 Hospital of Chinese PLA, Beijing, China
| | - Hong Zhang
- Anesthesia and Operation Center, Chinese PLA General Hospital, Beijing, China
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77
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Zbóril S, Schmidt AP, Oses JP, Wiener CD, Portela LV, Souza DO, Auler JOC, Carmona MJC, Fugita MS, Flor PB, Cortopassi SRG. S100B protein and neuron-specific enolase as predictors of postoperative cognitive dysfunction in aged dogs: a case-control study. Vet Anaesth Analg 2020; 47:740-747. [PMID: 32800537 DOI: 10.1016/j.vaa.2020.06.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 06/15/2020] [Accepted: 06/16/2020] [Indexed: 11/24/2022]
Abstract
OBJECTIVE Postoperative cognitive dysfunction (POCD) may be related to brain injury. S100B protein and neuron-specific enolase (NSE) have been investigated as potential biochemical markers of neural cell injury in animals and humans. This study aimed to investigate the association between POCD, brain injury and serum concentrations of S100B and NSE after periodontal surgery in aged dogs. STUDY DESIGN Prospective observational animal study. ANIMALS A total of 24 male and female dogs undergoing periodontal surgery. METHODS Dogs were separated into two groups based on age: control group, 10 dogs ≤ 8 years and aged group, 14 dogs > 8 years. Cognitive function was measured preoperatively and on the seventh postoperative day using the Canine Cognitive Dysfunction Rating scale and the Age-Related Cognitive and Affective Disorders scale. S100B protein and NSE serum concentrations were measured before and immediately after the surgery. RESULTS POCD was not observed after surgery in the present study. Serum concentrations of S100B and NSE were increased postoperatively in the control group but not in the aged group (p = 0.04 and 0.03, respectively). Preoperative S100B serum concentrations were significantly higher in the aged group (p = 0.01). CONCLUSIONS There was no association between POCD and high concentrations of S100B and NSE in dogs. However, increased postoperative serum concentrations of S100B and NSE were found in the control group after surgery, an effect that may indicate neural damage. CLINICAL RELEVANCE The results suggest that anesthesia and oral surgery are associated with higher postoperative serum concentrations of S100B and NSE in dogs ≤ 8 years old, which may indicate neural damage. Serum concentrations of S100B were elevated in aged dogs before anesthesia, a finding that might be related to chronic preoperative brain damage.
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Affiliation(s)
- Sabrina Zbóril
- Department of Surgery, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo (USP), São Paulo, SP, Brazil
| | - André P Schmidt
- Department of Biochemistry, Instituto de Ciências Básicas da Saúde (ICBS), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil; Department of Anesthesia and Perioperative Medicine, Hospital de Clínicas de Porto Alegre, UFRGS, Porto Alegre, RS, Brazil; Department of Anesthesia, Santa Casa de Porto Alegre, UFCSPA, Porto Alegre, RS, Brazil; Department of Anesthesia, Hospital Nossa Senhora da Conceição, Porto Alegre, RS, Brazil.
| | - Jean P Oses
- Postgraduate Program in Biochemistry and Molecular Biology, Setor de Bioquímica, Instituto de Biociências, Universidade Federal do Mato Grosso do Sul (UFMS), Campo Grande, MS, Brazil
| | - Carolina D Wiener
- Postgraduate Program in Health and Behavior, Universidade Católica de Pelotas, Pelotas, RS, Brazil
| | - Luis V Portela
- Department of Biochemistry, Instituto de Ciências Básicas da Saúde (ICBS), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Diogo O Souza
- Department of Biochemistry, Instituto de Ciências Básicas da Saúde (ICBS), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - José O C Auler
- Disciplina de Anestesiologia, Departamento de Cirurgia, Faculdade de Medicina, Universidade de Sao Paulo (USP), São Paulo, SP, Brazil
| | - Maria J C Carmona
- Disciplina de Anestesiologia, Departamento de Cirurgia, Faculdade de Medicina, Universidade de Sao Paulo (USP), São Paulo, SP, Brazil
| | - Mariana S Fugita
- Department of Surgery, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo (USP), São Paulo, SP, Brazil
| | - Patricia B Flor
- Department of Surgery, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo (USP), São Paulo, SP, Brazil
| | - Silvia R G Cortopassi
- Department of Surgery, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo (USP), São Paulo, SP, Brazil
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78
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Tasbihgou SR, Absalom AR. Postoperative neurocognitive disorders. Korean J Anesthesiol 2020; 74:15-22. [PMID: 32623846 PMCID: PMC7862941 DOI: 10.4097/kja.20294] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 07/01/2020] [Indexed: 12/16/2022] Open
Abstract
A decline in cognitive function is a frequent complication of major surgery. Postoperative cognitive impairments have generally been divided into short- (postoperative delirium) and long-term disturbances (postoperative cognitive dysfunction [POCD]). Long-term impairments are often subtle and overlooked. They need to be objectively assessed using neuropsychological tests to be diagnosed. Although POCD has been the subject of considerable research over the past decades, it remains uncertain why some patients do not return to preoperative levels of cognitive function. Surgery and anesthesia have both been implicated to play a role in POCD development, and certain patient-related factors, such as advanced age and low preoperative baseline cognitive function, have consistently been found to predict postoperative cognitive decline. This article will present an overview of POCD and its etiology and provide advice on possible strategies on its prevention.
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Affiliation(s)
- Setayesh Reza Tasbihgou
- Department of Anesthesiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Anthony Ray Absalom
- Department of Anesthesiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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79
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Zhang J, Xiao B, Li CX, Wang Y. Fingolimod (FTY720) improves postoperative cognitive dysfunction in mice subjected to D-galactose-induced aging. Neural Regen Res 2020; 15:1308-1315. [PMID: 31960817 PMCID: PMC7047799 DOI: 10.4103/1673-5374.272617] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 07/18/2019] [Accepted: 08/13/2019] [Indexed: 12/19/2022] Open
Abstract
Neurocognitive dysfunction is a common postoperative complication, especially in older adult patients. Fingolimod (FTY720) is a sphingosine-1-phosphate receptor modulator that has been found to be neuroprotective in several animal models of central nervous system disease. However, few reports have examined whether FTY720 could mitigate postoperative cognitive dysfunction. In this study, we investigated whether FTY720 could prevent postoperative neurocognitive impairment in mice subjected to D-galactose-induced aging. We induced an accelerated model of aging by administering an intraperitoneal injection of D-galactose. Subsequently, we performed a partial hepatolobectomy under sevoflurane anesthesia. FTY720 (1 mg/kg) was administered intraperitoneally 3 hours before and 24 hours after anesthesia and surgery. Our results indicated that anesthesia and surgery significantly impaired spatial memory in the Y-maze test 6 hours after surgery. We also found that problem solving ability and long-term memory in the puzzle box test on postoperative days 2-4 were significantly improved by FTY720 treatment. Immunohistochemical staining and western blot assay demonstrated that FTY720 significantly inhibited microglial activation in the hippocampal CA1 region of mice 6 hours and 3 days after anesthesia, and down-regulated the expression of synaptic-related proteins postsynaptic density protein 95 and GluR2 in the hippocampus. These results indicate that FTY720 improved postoperative neurocognitive dysfunction in mice subjected to D-galactose-induced aging. This study was approved by the Experimental Animal Ethics Committee of the Third Xiangya Hospital of Central South University of China (approval No. LLSC (LA) 2016-025) on September 27, 2016.
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Affiliation(s)
- Jie Zhang
- Department of Anesthesiology, Third Xiangya Hospital of Central South University, Changsha, Hunan Province, China
| | - Bin Xiao
- Department of Orthopedics, the Second Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, Shaanxi Province, China
| | - Chen-Xu Li
- Department of Anesthesiology, Third Xiangya Hospital of Central South University, Changsha, Hunan Province, China
| | - Yi Wang
- Department of Anesthesiology, Third Xiangya Hospital of Central South University, Changsha, Hunan Province, China
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80
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Niu W, Ma L, Tao T, Tian F, He T, Qiao M, He H, Liu X, Zhao X. Surgery-induced cognitive dysfunction is alleviated through triggering receptor expressed on myeloid cells 2. Acta Histochem 2020; 122:151553. [PMID: 32381365 DOI: 10.1016/j.acthis.2020.151553] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 04/19/2020] [Accepted: 04/20/2020] [Indexed: 01/22/2023]
Abstract
Neuroinflammation plays a key role in perioperative neurocognitive disorders (PND). Increased evidences indicate that triggering receptor expressed on myeloid cells 2 (TREM2) can mitigate inflammatory response in the brain, and the aim of this study is to investigate whether TREM2 is involved in surgery-induced cognitive dysfunction in adult mice. We used adult C57BL/6 mice subjected to intramedullary fixation surgery, and found that surgery did not impair the motor ability of mice, but worsened the learning and memory function, and reduced the expression of TREM2. Meanwhile, up-regulated TREM2 expression in the brain of mice, induced by selective TREM2 agonist HSP60, significantly improved the learning and memory, alleviated the neuroinflammation, and decreased the neuronal cell apoptosis in mice. Meanwhile, TREM2-siRNA abolished the increased expression of TREM2 induced by HSP60, and reversed all the HSP60-induced beneficial effects. Therefore, our study indicated that up-regulation of TREM2 alleviated neuroinflammation and improved learning and memory function after surgery in mice.
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Affiliation(s)
- Wen Niu
- Department of Pathophysiology, Institute of Basic Medical Science, PLA General Hospital, Beijing, 100853, China; Department of Physiology and Pathophysiology, The Fourth Military Medical University, Xi'an, 710032, China
| | - Lei Ma
- Department of Anesthesiology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, China
| | - Tianqi Tao
- Department of Pathophysiology, Institute of Basic Medical Science, PLA General Hospital, Beijing, 100853, China
| | - Fangfang Tian
- Department of Anesthesiology, Tangdu Hospital, The Fourth Military Medical University, Xi'an, 710038, China
| | - Tao He
- Department of Pathophysiology, Institute of Basic Medical Science, PLA General Hospital, Beijing, 100853, China
| | - Min Qiao
- Department of Respiratory Medicine, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, China
| | - Haimeng He
- Department of Anesthesiology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, China
| | - Xiuhua Liu
- Department of Pathophysiology, Institute of Basic Medical Science, PLA General Hospital, Beijing, 100853, China.
| | - Xiayong Zhao
- Department of Physiology and Pathophysiology, The Fourth Military Medical University, Xi'an, 710032, China; Department of Anesthesiology, Ankang Central Hospital, Ankang, 725000, China.
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81
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Zhang NN, Sun L, Chen WT, Yang YL, Wu YM. Effects of edaravone on postoperative cognitive function in elderly patients undergoing hip joint replacement surgery: A randomized controlled trial. Int J Surg 2020; 80:13-18. [PMID: 32535263 DOI: 10.1016/j.ijsu.2020.05.092] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 05/27/2020] [Accepted: 05/29/2020] [Indexed: 01/07/2023]
Abstract
BACKGROUND Postoperative cognitive dysfunction (POCD) is a complication of central nervous system in patients after surgery. Edaravone as a brain-protective agent may have protective effect on postoperative cognitive function. The study was designed to explore the effects of edaravone on postoperative cognitive function in elderly patients undergoing hip joint replacement surgery and potential mechanism. PATIENTS AND METHODS Patients undergoing hip joint replacement surgery were randomly allocated into 2 groups: the edaravone group (group E) and the control group (group C). Group E received intravenous edaravone at a dose of 0.5 mg/kg after induction of anesthesia, while group C received normal saline. The cognitive function was evaluated with the Mini-Mental State Examination (MMSE) 1day before surgery,3 days and the 7 days after surgery. Patients' plasma samples were collected to detect the levels of S100β protein (S100β), interleukin-6 (IL-6), matrix metalloproteinase-9 (MMP-9), superoxide dismutase (SOD) and malondialdehyde (MDA) before the induction of anesthesia, at the end of surgery and on postoperative day 3. RESULTS The MMSE scores in group E were higher than those of group C 3 days after surgery (25.98 ± 1.99 vs 24.86 ± 1.86, p = 0.003). There were remarkable rises (p < 0.05) in plasma IL-6, S100βand MMP-9 levels at the end of surgery and on postoperative day 3 in the two groups, however, edaravone pretreatment could reduce these levels to a certain extent compared with group C (p < 0.05).In group E, the SOD concentration was higher at the end of surgery (16.03 ± 2.46U/ml vs. 13.65 ± 2.53U/ml, p = 0.0001), while the MDA level was lower on postoperative day 3 than those in group C (7.01 ± 2.37 nmol/ml vs. 11.34 ± 3.18 nmol/ml, p = 0.0001). CONCLUSION The results indicated that preoperative intervention with edaravone may improve the postoperative cognitive function in elderly patients undergoing hip joint replacement surgery.
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Affiliation(s)
- Nan-Nan Zhang
- Department of Anesthesiology, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, 2800 Gongwei Road, Huinan Town, Pudong, Shanghai, 201399, China
| | - Long Sun
- Department of Anesthesiology, Shuguang Hospital Affiliated to Shanghai University of Chinese Traditional Medicine, 528 Zhangheng Road, Pudong, Shanghai, 201203, China.
| | - Wen-Ting Chen
- Department of Anesthesiology, Shuguang Hospital Affiliated to Shanghai University of Chinese Traditional Medicine, 528 Zhangheng Road, Pudong, Shanghai, 201203, China
| | - Yang-Liang Yang
- Department of Anesthesiology, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, 2800 Gongwei Road, Huinan Town, Pudong, Shanghai, 201399, China
| | - Yi-Ming Wu
- Department of Anesthesiology, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, 2800 Gongwei Road, Huinan Town, Pudong, Shanghai, 201399, China.
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T1-11, an adenosine derivative, ameliorates aging-related behavioral physiology and senescence markers in aging mice. Aging (Albany NY) 2020; 12:10556-10577. [PMID: 32501291 PMCID: PMC7346012 DOI: 10.18632/aging.103279] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 04/20/2020] [Indexed: 12/25/2022]
Abstract
Aging is a natural human process. It is uniquely individual, taking into account experiences, lifestyle habits and environmental factors. However, many disorders and syndromes, such as osteoporosis, neurodegenerative disorders, cognitive decline etc., often come with aging. The present study was designed to investigate the possible anti-aging effect of N6-(4-hydroxybenzyl)adenine riboside (T1-11), an adenosine analog isolated from Gastrodia elata, in a mouse model of aging created by D-galactose (D-gal) and the underlying mechanism, as well as explore the role of adenosine signaling in aging. T1-11 activated A2AR and suppressed D-gal- and BeSO4-induced cellular senescence in vitro. In vivo results in mice revealed that T1-11 abated D-gal-induced reactive oxygen species generation and ameliorated cognitive decline by inducing neurogenesis and lowering D-gal-caused neuron death. T1-11 could be a potent agent for postponing senility and preventing aging-related neuroinflammation and neurodegeneration.
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83
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Zhan G, Hua D, Huang N, Wang Y, Li S, Zhou Z, Yang N, Jiang R, Zhu B, Yang L, Yu F, Xu H, Yang C, Luo A. Anesthesia and surgery induce cognitive dysfunction in elderly male mice: the role of gut microbiota. Aging (Albany NY) 2020; 11:1778-1790. [PMID: 30904902 PMCID: PMC6461176 DOI: 10.18632/aging.101871] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 03/10/2019] [Indexed: 12/14/2022]
Abstract
It is well known that the incidence of postoperative cognitive dysfunction (POCD) is high in elderly patients. The pathogenesis and therapeutic mechanisms of POCD, however, have not yet been completely elucidated. The effects of gut microbiota, particularly in terms of regulating brain function, have gradually attracted increasing attention. In this study, we investigated the potential role of gut microbiota in POCD in aged male mice and attempted to determine whether alterations in gut microbiota would be helpful in the diagnosis of POCD. POCD and non-POCD mice were classified by hierarchical cluster analysis of behavioral results. Additionally, α- and β-diversity of gut microbiota showed a differential profile between the groups. In total, 24 gut bacteria were significantly altered in POCD mice compared with those in non-POCD mice, in which 13 gut bacteria were significantly correlated with escape latency in the Morris water maze test (MWMT). Remarkably, receiver operating characteristic curves revealed that the Dehalobacteriaceae family and Dehalobacterium genus are potentially important bacteria for the diagnosis of POCD. These findings indicate that alterations in the composition of gut microbiota are probably involved in the pathogenesis of POCD in aged mice. Novel therapeutic strategies regulating specific gut bacteria may be helpful for the prevention and treatment of POCD.
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Affiliation(s)
- Gaofeng Zhan
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Dongyu Hua
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Niannian Huang
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yue Wang
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shan Li
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhiqiang Zhou
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ning Yang
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Riyue Jiang
- Department of Internal Medicine, The Third Affiliated Hospital of Soochow University, Jiangsu, China
| | - Bin Zhu
- Department of Internal Medicine, The Third Affiliated Hospital of Soochow University, Jiangsu, China
| | - Ling Yang
- Department of Internal Medicine, The Third Affiliated Hospital of Soochow University, Jiangsu, China
| | - Fan Yu
- Department of Internal Medicine, The Third Affiliated Hospital of Soochow University, Jiangsu, China
| | - Hui Xu
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chun Yang
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ailin Luo
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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84
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Sungur Z, Şentürk M. Might complications of analgesic regimen affect cognitive assessment and how to diagnose POCD? Reg Anesth Pain Med 2020; 45:rapm-2020-101354. [PMID: 32217730 DOI: 10.1136/rapm-2020-101354] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 02/08/2020] [Indexed: 11/04/2022]
Affiliation(s)
- Zerrin Sungur
- Anesthesiology, Istanbul University Istanbul Faculty of Medicine, Istanbul, Turkey
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85
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Fan X, Li J, Deng X, Lu Y, Feng Y, Ma S, Wen H, Zhao Q, Tan W, Shi T, Wang Z. Design, synthesis and bioactivity study of N-salicyloyl tryptamine derivatives as multifunctional agents for the treatment of neuroinflammation. Eur J Med Chem 2020; 193:112217. [PMID: 32182488 DOI: 10.1016/j.ejmech.2020.112217] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 03/03/2020] [Accepted: 03/07/2020] [Indexed: 12/12/2022]
Abstract
Because of the complex etiology in neuroinflammatory process, the design of multifunctional agents is a potent strategy to cure neuroinflammatory diseases including AD and PD. Herein, based on the combination principles, 23 of N-salicyloyl tryptamine derivatives as multifunctional agents were designed and their new application for anti-neuroinflammation was disclosed. In cyclooxygenase assay, two compounds 3 and 16 displayed extremely preferable COX-2 inhibition than N-salicyloyl tryptamine. In LPS-induced C6 and BV2 cell models, some compounds decreased the production of proinflammatory mediators NO, PGE2, TNF-α, iNOS, COX-2 and ROS, while increased the production of IL-10. Among them, compound 3 and 16 showed approximately six-fold better inhibition on nitric oxide production than N-salicyloyl tryptamine in C6. Besides, compounds 3, 13 and 16 attenuated the activation of BV2 and C6 cells. More importantly, in vivo, compounds 3 and 16 reduced GFAP and Iba-1 levels in the hippocampus, and displayed neuroprotection in Nissl staining. Besides, both compounds 3 and 16 had high safety (LD50 > 1000 mg/kg). Longer plasma half-life of compounds 3 and 16 than melatonin supported combination strategy. All these results demonstrated that N-salicyloyl tryptamine derivatives are potential anti-neuroinflammation agents for the treatment of neurodegenerative disorder.
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Affiliation(s)
- Xiaohong Fan
- School of Pharmacy, Lanzhou University, Lanzhou, 730000, China
| | - Junfang Li
- School of Pharmacy, Lanzhou University, Lanzhou, 730000, China
| | - Xuemei Deng
- School of Pharmacy, Lanzhou University, Lanzhou, 730000, China
| | - Yingmei Lu
- School of Pharmacy, Lanzhou University, Lanzhou, 730000, China
| | - Yiyue Feng
- School of Pharmacy, Lanzhou University, Lanzhou, 730000, China
| | - Shumeng Ma
- School of Pharmacy, Lanzhou University, Lanzhou, 730000, China
| | - Huaixiu Wen
- Key Laboratory of Tibetan Medicine Research, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810000, China
| | - Quanyi Zhao
- School of Pharmacy, Lanzhou University, Lanzhou, 730000, China
| | - Wen Tan
- School of Pharmacy, Lanzhou University, Lanzhou, 730000, China
| | - Tao Shi
- School of Pharmacy, Lanzhou University, Lanzhou, 730000, China.
| | - Zhen Wang
- School of Pharmacy, Lanzhou University, Lanzhou, 730000, China; State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China.
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86
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Meng B, Li X, Lu B, Liu R, Yuan H, Zhai X, Qin J, Chen Z, Zheng J, Chen J. The Investigation of Hippocampus-Dependent Cognitive Decline Induced by Anesthesia/Surgery in Mice Through Integrated Behavioral Z-Scoring. Front Behav Neurosci 2020; 13:282. [PMID: 32038186 PMCID: PMC6987045 DOI: 10.3389/fnbeh.2019.00282] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 12/11/2019] [Indexed: 01/11/2023] Open
Abstract
Objective Patients undergoing major surgeries may experience certain cognitive decline, which is known as postoperative delirium (POD) or postoperative cognitive dysfunction (POCD). We employed integrated behavioral Z-scoring introduced by Guilloux et al. (2011) to investigate the effects of fracture fixation under anesthesia on hippocampus-dependent memory in mice. Methods ICR mice (12-14 months) underwent stabilized tibial fracture operation under sevoflurane anesthesia. They were subjected to a battery of successive hippocampus-dependent tests following surgery, including open field test (OF), novel object recognition (NOR), fear conditioning test (FC), and Morris water maze (MWM). The integrated behavioral Z-scoring was applied to assess the hippocampus-dependent memory after anesthesia/surgery, and the association between the integrated behavioral Z-scores and hippocampal pro-inflammatory cytokines was explored. Results Mice after anesthesia/surgery were found to have impaired hippocampus-dependent memory in NOR, FC, and MWM but with different degrees in these aspects as represented by P-value and effect size. The integrated memory Z-scores based on principal parameters of the above three tests can reduced the variability and increase the comprehensiveness of behavioral results. However, we found no statistic associations between hippocampal pro-inflammatory cytokines and the integrated Z-scores, as the elevated cytokines quickly return to normal on postoperative day 3 and/or day 7. Conclusion The integrated Z-score methodology could facilitate the interpretation of the anesthesia/surgery induced cognitive decline in mice and robustly quantify the behavioral phenotyping of hippocampus-dependent memory.
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Affiliation(s)
- Bo Meng
- Department of Anesthesiology, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
| | - Xiaoyu Li
- Department of Anesthesiology, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
| | - Bo Lu
- Department of Anesthesiology, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
| | - Rongjun Liu
- Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, China
| | - Hui Yuan
- Department of Anesthesiology, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
| | - Xiaojie Zhai
- Department of Anesthesiology, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
| | - Jinling Qin
- Department of Anesthesiology, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
| | - Zhang Chen
- Department of Anesthesiology, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
| | - Jinwei Zheng
- Department of Anesthesiology, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
| | - Junping Chen
- Department of Anesthesiology, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
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87
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Yin L, Gao S, Li C. Exogenous hydrogen sulfide alleviates surgery-induced neuroinflammatory cognitive impairment in adult mice by inhibiting NO signaling. BMC Anesthesiol 2020; 20:12. [PMID: 31918664 PMCID: PMC6953271 DOI: 10.1186/s12871-019-0927-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 12/30/2019] [Indexed: 01/04/2023] Open
Abstract
Background To investigate the effect and mechanisms of exogenous hydrogen sulfide in surgery-induced neuroinflammatory cognitive dysfunction. Methods C57BL/6 J male mice (n = 140) were used and randomly divided into seven groups: the sham group, surgery group, GYY4137 group, L-NAME group, surgery+GYY4137 group, surgery +L-NAME group, and surgery+GYY4137 + L-NAME group. After the interventions, open field tests (OFT) and the Morris water maze (MWM) test were conducted to evaluate learning and memory abilities in the mice. ELISAs, nitrate reductase assays, and Western blots (WB) were conducted to evaluate interleukin-1 beta (IL-1β), tumor necrosis factor-alpha (TNF-α), nitric oxide (NO), inducible nitric oxide synthase (iNOS), malondialdehyde (MDA), and antioxidant enzyme superoxide dismutase (SOD) levels. Furthermore, the expression level of microglial marker ionized calcium binding adaptor molecule 1 (IBA) in the hippocampal CA1 and CA3 areas was detected by an immunohistochemical (IHC) assay and apoptotic cells were observed using terminal deoxynucleotidyl transferase dUTP end-labeling (TUNEL) staining kits. Results We found that surgery induced neuroinflammatory cognitive dysfunction, oxidative stress, microglial activation, and cell apoptosis in the hippocampus. Moreover, following surgery, NO and iNOS levels were elevated in the hippocampus. Notably, all the effects caused by surgery were reversed by the H2S donor GYY4137 or the iNOS inhibitor N(gamma)-nitro-L-arginine methyl ester (L-NAME). However, the combined application of GYY4137 and L-NAME was not superior to treatment with either agent alone and the effect of GYY4137 was similar to that of L-NAME. Conclusion The long-acting hydrogen sulfide donor GYY4137 had an ability to reversed the cognitive deficits and inflammation caused by carotid artery exposure surgery. This implies that NO signaling pathways might participate in this process. These results indicate that exogenous H2S may be a promising therapy for POCD.
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Affiliation(s)
- Lijun Yin
- Department of Anesthesiology, Baodi Clinical College of Tianjin Medical University, No.8 Guangchuan Road, Baodi District, Tianjin, 301800, China
| | - Shunli Gao
- Department of Anesthesiology, Baodi Clinical College of Tianjin Medical University, No.8 Guangchuan Road, Baodi District, Tianjin, 301800, China
| | - Changkun Li
- Department of Anesthesiology, Baodi Clinical College of Tianjin Medical University, No.8 Guangchuan Road, Baodi District, Tianjin, 301800, China.
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88
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Liu C, Zha X, Liu H, Wei F, Zhang F. Ampelopsin alleviates sevoflurane-induced cognitive dysfunction by mediating NF-κB pathway in aged rats. Genes Genomics 2020; 42:361-369. [PMID: 31902108 DOI: 10.1007/s13258-019-00897-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 11/25/2019] [Indexed: 12/27/2022]
Abstract
BACKGROUND Cancer-induced bone pain (CIBP) is the pain caused by bone metastasis from malignant tumors, and the largest source of pain for cancer patients. miR-300 is an important miRNA in cancer. It has been shown that miR-300 regulates tumorigenesis of various tumors. PURPOSE This study aims to investigate the role of miR-300 in CIBP and its underlying molecular mechanisms in vitro and in vivo. METHODS We constructed CIBP model in rats and investigated the mechanism through which miR-300 affects CIBP. We first examined expression level of miR-300 in CIBP rats and then tested the effect of its overexpression. Next, we identified the target of miR-300 using TargetScan analysis and double luciferase assay. Finally, we studied genetic interactions between miR-300 and its target and their roles in CIBP. RESULTS We found that miR-300 was downregulated in CIBP rats. Overexpression of miR-300 significantly attenuated cancer-induced neuropathic pain (p < 0.01). Furthermore, TargetScan analysis and double luciferase assay show High Mobility Group Box 1 (HMGB1) is a target of miR-300. Notably, HMGB1 is overexpressed in CIBP rats, while up-regulation of miR-300 significantly suppresses expression of HMGB1 (p < 0.01). Moreover, knockdown of HMGB1 by siRNA significantly relieves cancer-induced neuropathic pain in rats (p < 0.01). On the other hand, HMGB1 overexpression partially blocked the effect of miR-300 on cancer-induced nerve pain. CONCLUSION miR-300 relieves cancer-induced neuropathic pain by inhibiting HMGB1 expression. These results may be beneficial for the treatment of CIBP in clinical practice.
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Affiliation(s)
- Chenglong Liu
- Department of Anesthesiology, Gaoyou Hospital Affiliated Soochow University, Gaoyou People's Hospital, No. 116 Fuqian Street, Gaoyou City, Yangzhou City, 225600, Jiangsu Province, China.
| | - Xiaojuan Zha
- Thyroid Center, Shanghai Research Center for Thyroid Diseases, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, 200072, China
| | - Haihua Liu
- Department of Neurology, Gaoyou Hospital Affiliated Soochow University, Gaoyou People's Hospital, Gaoyou City, 225600, Jiangsu Province, China
| | - Fang Wei
- Department of Radiology, Gaoyou Hospital Affiliated Soochow University, Gaoyou People's Hospital, Gaoyou City, 225600, Jiangsu Province, China
| | - Fei Zhang
- Department of Anesthesiology, Gaoyou Hospital Affiliated Soochow University, Gaoyou People's Hospital, No. 116 Fuqian Street, Gaoyou City, Yangzhou City, 225600, Jiangsu Province, China
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89
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Sun XY, Zheng T, Yang X, Liu L, Gao SS, Xu HB, Song YT, Tong K, Yang L, Gao Y, Wu T, Hao JR, Lu C, Ma T, Gao C. HDAC2 hyperexpression alters hippocampal neuronal transcription and microglial activity in neuroinflammation-induced cognitive dysfunction. J Neuroinflammation 2019; 16:249. [PMID: 31796106 PMCID: PMC6889553 DOI: 10.1186/s12974-019-1640-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 11/12/2019] [Indexed: 02/08/2023] Open
Abstract
Background Inflammation can induce cognitive dysfunction in patients who undergo surgery. Previous studies have demonstrated that both acute peripheral inflammation and anaesthetic insults, especially isoflurane (ISO), are risk factors for memory impairment. Few studies are currently investigating the role of ISO under acute peri-inflammatory conditions, and it is difficult to predict whether ISO can aggravate inflammation-induced cognitive deficits. HDACs, which are essential for learning, participate in the deacetylation of lysine residues and the regulation of gene transcription. However, the cell-specific mechanism of HDACs in inflammation-induced cognitive impairment remains unknown. Methods Three-month-old C57BL/6 mice were treated with single versus combined exposure to LPS injected intraperitoneally (i.p.) to simulate acute abdominal inflammation and isoflurane to investigate the role of anaesthesia and acute peripheral inflammation in cognitive impairment. Behavioural tests, Western blotting, ELISA, immunofluorescence, qRT-PCR, and ChIP assays were performed to detect memory, the expressions of inflammatory cytokines, HDAC2, BDNF, c-Fos, acetyl-H3, microglial activity, Bdnf mRNA, c-fos mRNA, and Bdnf and c-fos transcription in the hippocampus. Results LPS, but not isoflurane, induced neuroinflammation-induced memory impairment and reduced histone acetylation by upregulating histone deacetylase 2 (HDAC2) in dorsal hippocampal CaMKII+ neurons. The hyperexpression of HDAC2 in neurons was mediated by the activation of microglia. The decreased level of histone acetylation suppressed the transcription of Bdnf and c-fos and the expressions of BDNF and c-Fos, which subsequently impaired memory. The adeno-associated virus ShHdac2, which suppresses Hdac2 after injection into the dorsal hippocampus, reversed microglial activation, hippocampal glutamatergic BDNF and c-Fos expressions, and memory deficits. Conclusions Reversing HDAC2 in hippocampal CaMKII+ neurons exert a neuroprotective effect against neuroinflammation-induced memory deficits.
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Affiliation(s)
- Xiao-Yu Sun
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China.,Jiangsu Province Key Laboratory of Anesthesia and Analgesia Application, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, China
| | - Teng Zheng
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China.,Jiangsu Province Key Laboratory of Anesthesia and Analgesia Application, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, China.,Department of Anesthesiology, the First Affiliated Hospital of Soochow University, Suzhou, 215006, Jiangsu, China
| | - Xiu Yang
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China.,Jiangsu Province Key Laboratory of Anesthesia and Analgesia Application, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, China
| | - Le Liu
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China.,Jiangsu Province Key Laboratory of Anesthesia and Analgesia Application, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, China
| | - Shen-Shen Gao
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China.,Jiangsu Province Key Laboratory of Anesthesia and Analgesia Application, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, China
| | - Han-Bing Xu
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China.,Jiangsu Province Key Laboratory of Anesthesia and Analgesia Application, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, China
| | - Yu-Tong Song
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China.,Jiangsu Province Key Laboratory of Anesthesia and Analgesia Application, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, China
| | - Kun Tong
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China.,Jiangsu Province Key Laboratory of Anesthesia and Analgesia Application, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, China
| | - Li Yang
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China.,Jiangsu Province Key Laboratory of Anesthesia and Analgesia Application, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, China
| | - Ya Gao
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China.,Jiangsu Province Key Laboratory of Anesthesia and Analgesia Application, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, China
| | - Tong Wu
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China.,Jiangsu Province Key Laboratory of Anesthesia and Analgesia Application, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, China
| | - Jing-Ru Hao
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China.,Jiangsu Province Key Laboratory of Anesthesia and Analgesia Application, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, China
| | - Chen Lu
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China.,Jiangsu Province Key Laboratory of Anesthesia and Analgesia Application, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, China
| | - Tao Ma
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China.,Jiangsu Province Key Laboratory of Anesthesia and Analgesia Application, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, China
| | - Can Gao
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China. .,Jiangsu Province Key Laboratory of Anesthesia and Analgesia Application, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, China.
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90
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Cheng W, Wang M, Liu P, Zhao S, Liu X, Wang X. Protective Effects of Dexmedetomidine and Oxycodone in Patients Undergoing Limb Ischemia-Reperfusion. Med Sci Monit 2019; 25:9073-9084. [PMID: 31782408 PMCID: PMC6902314 DOI: 10.12659/msm.918261] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Background Tourniquet-related complications are a common clinical problem. In the present study, we compared the effects of dexmedetomidine vs. oxycodone in patients undergoing limb ischemia-reperfusion. Material/Methods Fifty-four patients undergoing unilateral lower-extremity surgery under combined spinal and epidural anesthesia were randomly assigned to a control (ischemia-reperfusion, I/R) group, a dexmedetomidine (Dex) group, and an oxycodone (Oxy) group. Tourniquet-induced hemodynamic parameters changes among groups were compared. The serum concentration of malondialdehyde (MDA), superoxide dismutase (SOD), tumor necrosis factor-a (TNF-α), interleukin-6 (IL-6), fatty acid binding protein 3 (FABP3), endothelin-1 (ET-1), and brain-derived neurotrophic factor (BDNF) were measured using ELISA before anesthesia and at 30 min and at 6 h after tourniquet release. Results In the control group, tourniquet use caused significant increases in systolic arterial pressure (SAP), mean arterial pressure (MAP), diastolic arterial pressure (DAP), and rate-pressure product. Compared with Oxy, Dex significantly decreased heart rate (HR). Both Dex and Oxy lowered SAP compared with the control group. No significant difference was observed in DAP between Dex and Oxy. The levels of MDA, TNF-α, IL-6, FABP3, and ET-1 were significantly higher, while the SOD and BDNF were significantly lower compared to baseline in the I/R group, but the variation range of those agents was significantly smaller in the Dex and Oxy groups, and the measured values were comparable between the 2 groups. Conclusions Compared with Dex, Oxy was not inferior in mitigating tourniquet-induced hyperdynamic response, ameliorating the inflammatory reaction, and protecting remote multiple organs in lower-extremity surgery patients.
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Affiliation(s)
- Wenjie Cheng
- Department of Anesthesiology, The Third Hospital of HeBei Medical University, Shijiazhuang, Hebei, China (mainland)
| | - Mingjie Wang
- Department of Anesthesiology, The Third Hospital of HeBei Medical University, Shijiazhuang, Hebei, China (mainland)
| | - Peng Liu
- Department of Anesthesiology, The Third Hospital of HeBei Medical University, Shijiazhuang, Hebei, China (mainland)
| | - Shuang Zhao
- Department of Anesthesiology, The Third Hospital of HeBei Medical University, Shijiazhuang, Hebei, China (mainland)
| | - Xin Liu
- Department of Anesthesiology, The Third Hospital of HeBei Medical University, Shijiazhuang, Hebei, China (mainland)
| | - Xiuli Wang
- Department of Anesthesiology, The Third Hospital of HeBei Medical University, Shijiazhuang, Hebei, China (mainland)
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91
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Topiramate Reverses Physiological and Behavioral Alterations by Postoperative Cognitive Dysfunction in Rat Model Through Inhibiting TNF Signaling Pathway. Neuromolecular Med 2019; 22:227-238. [DOI: 10.1007/s12017-019-08578-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 10/18/2019] [Indexed: 12/18/2022]
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92
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Zhao W, Xu Z, Cao J, Fu Q, Wu Y, Zhang X, Long Y, Zhang X, Yang Y, Li Y, Mi W. Elamipretide (SS-31) improves mitochondrial dysfunction, synaptic and memory impairment induced by lipopolysaccharide in mice. J Neuroinflammation 2019; 16:230. [PMID: 31747905 PMCID: PMC6865061 DOI: 10.1186/s12974-019-1627-9] [Citation(s) in RCA: 92] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 10/29/2019] [Indexed: 12/21/2022] Open
Abstract
Background It is widely accepted that mitochondria have a direct impact on neuronal function and survival. Oxidative stress caused by mitochondrial abnormalities play an important role in the pathophysiology of lipopolysaccharide (LPS)-induced memory impairment. Elamipretide (SS-31) is a novel mitochondrion-targeted antioxidant. However, the impact of elamipretide on the cognitive sequelae of inflammatory and oxidative stress is unknown. Methods We utilized MWM and contextual fear conditioning test to assess hippocampus-related learning and memory performance. Molecular biology techniques and ELISA were used to examine mitochondrial function, oxidative stress, and the inflammatory response. TUNEL and Golgi-staining was used to detect neural cell apoptosis and the density of dendritic spines in the mouse hippocampus. Results Mice treated with LPS exhibited mitochondrial dysfunction, oxidative stress, an inflammatory response, neural cell apoptosis, and loss of dendritic spines in the hippocampus, leading to impaired hippocampus-related learning and memory performance in the MWM and contextual fear conditioning test. Treatment with elamipretide significantly ameliorated LPS-induced learning and memory impairment during behavioral tests. Notably, elamipretide not only provided protective effects against mitochondrial dysfunction and oxidative stress but also facilitated the regulation of brain-derived neurotrophic factor (BDNF) signaling, including the reversal of important synaptic-signaling proteins and increased synaptic structural complexity. Conclusion These findings indicate that LPS-induced memory impairment can be attenuated by the mitochondrion-targeted antioxidant elamipretide. Consequently, elamipretide may have a therapeutic potential in preventing damage from the oxidative stress and neuroinflammation that contribute to perioperative neurocognitive disorders (PND), which makes mitochondria a potential target for treatment strategies for PND.
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Affiliation(s)
- Weixing Zhao
- Anesthesia and Operation Center, the First Medical Center, Chinese PLA General Hospital, 28th Fuxing Road, Haidian District, Beijing, 100853, China
| | - Zhipeng Xu
- Anesthesia and Operation Center, the First Medical Center, Chinese PLA General Hospital, 28th Fuxing Road, Haidian District, Beijing, 100853, China
| | - Jiangbei Cao
- Anesthesia and Operation Center, the First Medical Center, Chinese PLA General Hospital, 28th Fuxing Road, Haidian District, Beijing, 100853, China
| | - Qiang Fu
- Anesthesia and Operation Center, the First Medical Center, Chinese PLA General Hospital, 28th Fuxing Road, Haidian District, Beijing, 100853, China
| | - Yishuang Wu
- Anesthesia and Operation Center, the First Medical Center, Chinese PLA General Hospital, 28th Fuxing Road, Haidian District, Beijing, 100853, China
| | - Xiaoying Zhang
- Anesthesia and Operation Center, the First Medical Center, Chinese PLA General Hospital, 28th Fuxing Road, Haidian District, Beijing, 100853, China
| | - Yue Long
- Anesthesia and Operation Center, the First Medical Center, Chinese PLA General Hospital, 28th Fuxing Road, Haidian District, Beijing, 100853, China
| | - Xuan Zhang
- Anesthesia and Operation Center, the First Medical Center, Chinese PLA General Hospital, 28th Fuxing Road, Haidian District, Beijing, 100853, China
| | - Yitian Yang
- Anesthesia and Operation Center, the First Medical Center, Chinese PLA General Hospital, 28th Fuxing Road, Haidian District, Beijing, 100853, China
| | - Yunfeng Li
- State Key Laboratory of Toxicology Medical Countermeasures, Beijing Key Laboratories of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, Academy of Military Sciences, Beijing, 100850, China
| | - Weidong Mi
- Anesthesia and Operation Center, the First Medical Center, Chinese PLA General Hospital, 28th Fuxing Road, Haidian District, Beijing, 100853, China.
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93
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Yuan H, Wu G, Zhai X, Lu B, Meng B, Chen J. Melatonin and Rapamycin Attenuate Isoflurane-Induced Cognitive Impairment Through Inhibition of Neuroinflammation by Suppressing the mTOR Signaling in the Hippocampus of Aged Mice. Front Aging Neurosci 2019; 11:314. [PMID: 31803045 PMCID: PMC6877689 DOI: 10.3389/fnagi.2019.00314] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 10/31/2019] [Indexed: 12/26/2022] Open
Abstract
Melatonin exerts neuroprotective effects on isoflurane-induced cognitive impairment. However, the underlying mechanism has yet to be elucidated. The present study sought to determine if melatonin confers its beneficial effects by acting on mammalian target of rapamycin (mTOR) and attenuates the neuroinflammation in the hippocampus of aged mice. A total of 72 male C57BL/6 mice, 16-month-old, were randomly and equally divided into six groups: (1) the control group (CON); (2) the rapamycin group (RAP); (3) the melatonin group (MEL); (4) the isoflurane group (ISO); (5) the rapamycin + isoflurane group (RAP + ISO); and (6) the melatonin + isoflurane group (MEL + ISO). RAP, RAP + ISO, MEL, MEL + ISO groups received 1 mg/kg/day mTOR inhibitor rapamycin solution or 10 mg/kg/day melatonin solution, respectively, intraperitoneally at 5:00 p.m. for 14 days consecutively. Mice in the CON and ISO groups were administered an equivalent volume of saline. Subsequently, ISO, RAP + ISO, and MEL + ISO groups were exposed to inhale 2% isoflurane for 4 h; the CON, RAP, and MEL mice received only the vehicle gas. Then, the memory function and spatial learning of the mice were examined via the Morris water maze (MWM) test. mTOR expression was detected via Western blot, whereas the concentration of inflammatory cytokines tumor necrosis factor (TNF)-α, interleukin (IL)-1β, IL-6 and that of melatonin was quantified with enzyme-linked immunosorbent assay (ELISA). Melatonin and rapamycin significantly ameliorated the isoflurane-induced cognitive impairment and also led to a decrease in the melatonin levels as well as the expression levels of TNF-α, IL-1β, IL-6, and p-mTOR in the hippocampus. In conclusion, these results showed that melatonin and rapamycin attenuates mTOR expression while affecting the downstream proinflammatory cytokines. Thus, these molecular findings could be associated with an improved cognitive function in mice exposed to isoflurane.
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Affiliation(s)
- Hui Yuan
- Department of Anesthesiology, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
| | - Guorong Wu
- Department of Anesthesiology, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
| | - Xiaojie Zhai
- Department of Anesthesiology, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
| | - Bo Lu
- Department of Anesthesiology, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
| | - Bo Meng
- Department of Anesthesiology, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
| | - Junping Chen
- Department of Anesthesiology, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
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Zhong J, Xu W. Characterization of DNA hydroxymethylation in the hypothalamus of elderly mice with post-operative cognitive dysfunction. Exp Ther Med 2019; 18:4002-4010. [PMID: 31641381 PMCID: PMC6796353 DOI: 10.3892/etm.2019.8056] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Accepted: 08/13/2019] [Indexed: 01/12/2023] Open
Abstract
Post-operative cognitive dysfunction (POCD) is a common syndrome characterized by perioperative cerebral damage in elderly patients, including cognitive impairment and memory loss. Recent studies have revealed that anesthesia is one of the key causes of POCD. Ubiquitin-like with PHD and ring finger domains 2 (Uhrf2) has been reported to play a crucial role in regulating DNA methylation and hydroxymethylation, which are closely connected with memory building and erasure. However, whether narcotic drugs can affect Uhrf2 to impact on DNA methylation and hydroxymethylation in POCD is poorly understood. In this study, a POCD model was established in elderly mice through sevoflurane treatment, and these mice were found to have compromised levels of global DNA 5'-hydroxymethylcytosine (5hmC) and Uhrf2 in the hippocampus and the amygdaloid nucleus, when compared with non-POCD and control mice. The results of immunoprecipitation and quantitative PCR revealed that 5hmC modification of the promoters of genes associated with neural protection and development, such as glial cell-derived neurotrophic factor, brain derived neurotrophic factor, glucocorticoid receptor and acyl-CoA sythetase short chain family member 2, was reduced in the hippocampus of POCD mice when compared with non-POCD and control mice. Taken together, the findings of the present study suggest that loss of 5hmC, in the hippocampus and the amygdaloid nucleus modulated by Uhrf2 suppression, may result in the learning and memory ability impairment seen in mice with POCD.
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Affiliation(s)
- Jiang Zhong
- Department of Anesthesiology, Jinshan Hospital, Fudan University, Shanghai 201508, P.R. China
| | - Wei Xu
- Department of Anesthesiology, Jinshan Hospital, Fudan University, Shanghai 201508, P.R. China
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95
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Li Z, Cao X, Ma H, Cui Y, Li X, Wang N, Zhou Y. Surgical Trauma Exacerbates Cognitive Deficits and Neuroinflammation in Aged Rats: The Role of CX3CL1-CX3CR1 Signaling. J Neuropathol Exp Neurol 2019; 77:736-746. [PMID: 29939299 DOI: 10.1093/jnen/nly051] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Age is the most prominent risk factor for the development of postoperative cognitive dysfunction. The present study investigated the role of CX3CL1-CX3CR1 signaling in age-related differences in surgery-induced cognitive deficits and neuroinflammation. Adult and aged male Sprague-Dawley rats were subjected to partial hepatectomy or partial hepatectomy with intracerebroventricular infusion of CX3CL1. On postoperative days 3, 7, and 14, the rats were subjected to an open field test and the Morris water maze test. Hippocampal interleukin-1β, CX3CL1, CX3CR1, brain derived neurotrophic factor (BDNF), ionized calcium-binding adapter molecule 1 (Iba-1), and Arginase-1 (Arg1) levels were measured. Age exacerbated cognitive impairment and increased neuroinflammation following surgery. Surgery-induced decreases in CX3CL1 and CX3CR1 proteins were accompanied by increased microglial activation, as indicated by increased Iba-1 expression. Corresponding decline in Arg1 and BDNF levels were observed. Treatment with CX3CL1 decreased proinflammatory cytokines expression, increased BDNF and Arg1 levels in the brain, and enhanced behavioral recovery. The surgery-induced decreases in CX3CL1 and CX3CR1 expression exacerbated postoperative cognitive deficits and exaggerated neuroinflammatory responses in this rodent model. Treatment with CX3CL1 attenuated these effects, at least partly by inhibiting microglial activation, decreasing the associated production of proinflammatory cytokines, and enhancing BDNF expression.
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Affiliation(s)
- Zhe Li
- Department of Anesthesiology, The First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Xuezhao Cao
- Department of Anesthesiology, The First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Hong Ma
- Department of Anesthesiology, The First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Yong Cui
- Department of Anesthesiology, The First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Xiaoqian Li
- Department of Anesthesiology, The First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Na Wang
- Department of Anesthesiology, The First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Yongjian Zhou
- Department of Anesthesiology, The First Hospital of China Medical University, Shenyang, Liaoning, China
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96
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Zhang XP, Liu YR, Chai M, Yang HT, Wang G, Han M, Li DB. High‑fat treatment prevents postoperative cognitive dysfunction in a hyperlipidemia model by protecting the blood‑brain barrier via Mfsd2a‑related signaling. Mol Med Rep 2019; 20:4226-4234. [PMID: 31545471 PMCID: PMC6797931 DOI: 10.3892/mmr.2019.10675] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Accepted: 08/12/2019] [Indexed: 12/04/2022] Open
Abstract
Damage to the blood-brain barrier (BBB) resulting from systemic inflammation caused by surgical trauma is associated with cognitive dysfunction, and individuals with hyperlipidemia are more sensitive to such impairment. The present study was designed to ascertain whether dexmedetomidine (Dex) treatment could reduce the incidence of cognitive dysfunction following surgery in a hyperlipidemia model. Hyperlipidemia was induced in Sprague-Dawley rats (male, 6–7 months old) by consuming a high-fat diet, and rats were divided into three groups (n=10 each) and underwent: exploratory laparotomy to introduce surgical trauma (surgery group), laparotomy and Dex treatment (surgery+Dex group), or sham surgery (sham group). Learning, memory and exploration behavior were assessed using the Morris water maze. Concentrations of tumor necrosis factor (TNF)-α and interleukin (IL)-1β, were determined by enzyme-linked immunosorbent assay. BBB permeability was assessed by Evans blue staining. Relative major facilitator superfamily domain-containing protein 2 (Mfsd2a) mRNA expression was determined by quantitative PCR. In the Morris water maze test, the time and distance ratio for the surgery group was significantly lower than those of the sham and surgery+Dex groups (P<0.05). In addition, the TNF-α concentrations in the sham and surgery+Dex groups were lower than that in the surgery group (P<0.05 on days 1 and 3). Evans Blue staining was increased in the surgery group on day 1 (P<0.01). Mfsd2a mRNA expression was higher in the sham and surgery+Dex groups compared with that noted in the surgery group (P<0.05). In conclusion, Dex treatment decreased the incidence of cognitive dysfunction following surgical trauma in a hyperlipidemia rat model. We demonstrated that Dex stabilized BBB integrity through increased Mfsd2a gene expression.
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Affiliation(s)
- Xiao-Ping Zhang
- Department of Anesthesiology, The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Yu-Ru Liu
- Department of Anesthesiology, Xilingol League Hospital, Inner Mongolia Autonomous Region, Chifeng, Xilinhot 026000, P.R. China
| | - Mei Chai
- Department of Anesthesiology, The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Hai-Tao Yang
- Department of Anesthesiology, The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Guan Wang
- Department of Anesthesiology, The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Mei Han
- Department of Anesthesiology, The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Dong-Bai Li
- Department of Anesthesiology, The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
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Role of Myocardial Infarction-Induced Neuroinflammation for Depression-Like Behavior and Heart Failure in Ovariectomized Female Rats. Neuroscience 2019; 415:201-214. [DOI: 10.1016/j.neuroscience.2019.07.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 07/04/2019] [Accepted: 07/05/2019] [Indexed: 12/20/2022]
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98
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Abstract
PURPOSE OF REVIEW The host-microbiota relationship is integral in human health and can be rapidly disrupted in ways that may contribute to poor recovery from surgery or acute illness. We review key studies by organ system to understand the effect of perioperative and critical illness stress on the microbiota. Throughout the review, our focus is on potential interventions that may be mediated by the microbiome. RECENT FINDINGS Although any perioperative intervention can have a profound impact on the gut microbiota, it is less clear how such changes translate into altered health outcomes. Preoperative stress (anxiety, lack of sleep, fasting), intraoperative stress (surgery itself, volatile anesthetics, perioperative antibiotics, blood transfusions), and postoperative stress (sepsis, surgical site infections, acute respiratory distress syndrome, catecholamines, antibiotics, opioids, proton pump inhibitors) have all been associated with alterations of the commensal microflora. These factors (e.g. administration of antibiotics or opioids) can create a favorable environment for emergence of pathogen virulence and development of serious infections and multiorgan failure. Data to recommend therapies aimed at restoring a disrupted microbiota, such as probiotics/prebiotics and fecal microbiota transplants is currently scarce. SUMMARY The microbiome is likely to play an important role in the perioperative and ICU setting but existing data is largely descriptive. There is an expanding number of mechanistic studies that attempt to disentangle the complicated bi-directional relationship between the host and the resident microbiota. When these results are combined with ongoing clinical studies, we should be able to offer better therapies aimed at restoring the microbiota in the future.
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Wu Y, Dou J, Wan X, Leng Y, Liu X, Chen L, Shen Q, Zhao B, Meng Q, Hou J. Histone Deacetylase Inhibitor MS-275 Alleviates Postoperative Cognitive Dysfunction in Rats by Inhibiting Hippocampal Neuroinflammation. Neuroscience 2019; 417:70-80. [PMID: 31430527 DOI: 10.1016/j.neuroscience.2019.08.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 08/07/2019] [Accepted: 08/10/2019] [Indexed: 12/28/2022]
Abstract
Neuroinflammation in the hippocampus plays essential roles in postoperative cognitive dysfunction (POCD). Histone deacetylases (HDACs) have recently been identified as key regulators of neuroinflammation. MS-275, an inhibitor of HDAC, has been reported to have neuroprotective effects. Therefore, the present study aimed to test the hypothesis that pretreatment with MS-275 prevents POCD by inhibiting neuroinflammation in rats. In this study, anesthesia/surgery impaired cognition, demonstrated by an increase escape latency and reduction in the number of platform crossings in Morris water maze (MWM) trials, through activating microglia neuroinflammation and decreasing PSD-95 expression. However, pretreatment with MS-275 attenuated postoperative cognitive impairment severity. Furthermore, pretreatment with MS-275 decreased activated microglia levels and increased PSD95 protein expression in the hippocampus. Pretreatment with MS-275 reduced NF-κB-p65 protein expression and nuclear accumulation as well as the neuroinflammatory response (production of proinflammatory cytokines including TNF-α and IL-1β) in the hippocampus. Additionally, MS-275 reduced HDAC2 expression and HDAC activity in the hippocampus, which were enhanced in vehicle-treated rats. These results suggest that MS-275 alleviates postoperative cognitive dysfunction by reducing neuroinflammation in the hippocampus of rats via HDAC inhibition.
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Affiliation(s)
- Yang Wu
- Department of Anesthesiology, Renmin Hospital, Wuhan University, P.O. Box 430060, No. 238 Jiefang Road, Wuhan, China
| | - Juan Dou
- Sterilization and Supply Center, Renmin Hospital, Wuhan University, P.O. Box 430060, No. 238 Jiefang Road, Wuhan, China
| | - Xing Wan
- Operating Room, Renmin Hospital, Wuhan University, P.O. Box 430060, No. 238 Jiefang Road, Wuhan, China
| | - Yan Leng
- Department of Anesthesiology, Renmin Hospital, Wuhan University, P.O. Box 430060, No. 238 Jiefang Road, Wuhan, China
| | - Xuke Liu
- Department of Anesthesiology, Renmin Hospital, Wuhan University, P.O. Box 430060, No. 238 Jiefang Road, Wuhan, China
| | - Lili Chen
- Department of Anesthesiology, Renmin Hospital, Wuhan University, P.O. Box 430060, No. 238 Jiefang Road, Wuhan, China
| | - Qianni Shen
- Department of Anesthesiology, Renmin Hospital, Wuhan University, P.O. Box 430060, No. 238 Jiefang Road, Wuhan, China
| | - Bo Zhao
- Department of Anesthesiology, Renmin Hospital, Wuhan University, P.O. Box 430060, No. 238 Jiefang Road, Wuhan, China
| | - Qingtao Meng
- Department of Anesthesiology, Renmin Hospital, Wuhan University, P.O. Box 430060, No. 238 Jiefang Road, Wuhan, China
| | - Jiabao Hou
- Department of Anesthesiology, Renmin Hospital, Wuhan University, P.O. Box 430060, No. 238 Jiefang Road, Wuhan, China.
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Chen Y, Sun JX, Chen WK, Wu GC, Wang YQ, Zhu KY, Wang J. miR-124/VAMP3 is a novel therapeutic target for mitigation of surgical trauma-induced microglial activation. Signal Transduct Target Ther 2019; 4:27. [PMID: 31637007 PMCID: PMC6799846 DOI: 10.1038/s41392-019-0061-x] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 05/28/2019] [Accepted: 06/11/2019] [Indexed: 12/11/2022] Open
Abstract
Activation of microglia and the subsequently elevated inflammatory cytokine release in the brain during surgery predispose individuals to cognitive dysfunction, also known as postoperative cognitive dysfunction (POCD). miR-124 is one of the most abundant microRNAs in the brain that regulates microglial function. Elucidating the role of miR-124 in microglial activation in the context of surgery may therefore promote understanding of as well as therapeutic development for post-surgical disorders involving microglial activation. The downstream targets of miR-124 were investigated using bioinformatic screening and dual-luciferase reporter assay validation, and vesicle-associated membrane protein 3 (VAMP3) was identified as a potential target. The kinetics of miR-124/VAMP3 expression was first examined in vitro in microglial cells (primary microglia and BV2 microglial cells) following lipopolysaccharide (LPS) stimulation. LPS induced a time-dependent decrease of miR-124 and upregulated the expression of VAMP3. Manipulating miR-124/VAMP3 expression by using miR-124 mimics or VAMP3-specific siRNA in LPS-stimulated BV2 microglial cells inhibited BV2 microglial activation-associated inflammatory cytokine release. To further examine the role of miR-124/VAMP3 in a surgical setting, we employed a rat surgical trauma model. Significant microglial activation and altered miR-124/VAMP3 expression were observed following surgical trauma. We also altered miR-124/VAMP3 expression in the rat surgical trauma model by administration of exogenous miR-124 and by using electroacupuncture, which is a clinically applicable treatment that modulates microglial function and minimizes postoperative disorders. We determined that electroacupuncture treatment specifically increases the expression of miR-124 in the hypothalamus and hippocampus. Increased miR-124 expression with a concomitant decrease in VAMP3 expression resulted in decreased inflammatory cytokine release related to microglial activation post-surgery. Our study indicates that miR-124/VAMP3 is involved in surgery-induced microglial activation and that targeting miR-124/VAMP3 could be a potential therapeutic strategy for postoperative disorders involving microglial activation.
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Affiliation(s)
- Yan Chen
- Department of Integrative Medicine and Neurobiology, State Key Laboratory of Medical Neurobiology, School of Basic Medical Science, Fudan University, 200032 Shanghai, China
- Institutes of Brain Science, Collaborative Innovation Center for Brain Science, Fudan University, 200032 Shanghai, China
- Institute of Acupuncture and Moxibustion, Fudan Institutes of Integrative Medicine, Fudan University, 200032 Shanghai, China
| | - Jing-xian Sun
- Department of Integrative Medicine and Neurobiology, State Key Laboratory of Medical Neurobiology, School of Basic Medical Science, Fudan University, 200032 Shanghai, China
- Institutes of Brain Science, Collaborative Innovation Center for Brain Science, Fudan University, 200032 Shanghai, China
- Institute of Acupuncture and Moxibustion, Fudan Institutes of Integrative Medicine, Fudan University, 200032 Shanghai, China
| | - Wan-kun Chen
- Department of Anesthesiology, Fudan University Shanghai Cancer Center, 200032 Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, 200032 Shanghai, China
| | - Gen-cheng Wu
- Department of Integrative Medicine and Neurobiology, State Key Laboratory of Medical Neurobiology, School of Basic Medical Science, Fudan University, 200032 Shanghai, China
- Institutes of Brain Science, Collaborative Innovation Center for Brain Science, Fudan University, 200032 Shanghai, China
- Institute of Acupuncture and Moxibustion, Fudan Institutes of Integrative Medicine, Fudan University, 200032 Shanghai, China
| | - Yan-qing Wang
- Department of Integrative Medicine and Neurobiology, State Key Laboratory of Medical Neurobiology, School of Basic Medical Science, Fudan University, 200032 Shanghai, China
- Institutes of Brain Science, Collaborative Innovation Center for Brain Science, Fudan University, 200032 Shanghai, China
- Institute of Acupuncture and Moxibustion, Fudan Institutes of Integrative Medicine, Fudan University, 200032 Shanghai, China
| | - Ke-ying Zhu
- Department of Integrative Medicine and Neurobiology, State Key Laboratory of Medical Neurobiology, School of Basic Medical Science, Fudan University, 200032 Shanghai, China
- Department of Clinical Neuroscience, Center for Molecular Medicine, Karolinska Institutet, 17176 Stockholm, Sweden
| | - Jun Wang
- Department of Integrative Medicine and Neurobiology, State Key Laboratory of Medical Neurobiology, School of Basic Medical Science, Fudan University, 200032 Shanghai, China
- Institutes of Brain Science, Collaborative Innovation Center for Brain Science, Fudan University, 200032 Shanghai, China
- Institute of Acupuncture and Moxibustion, Fudan Institutes of Integrative Medicine, Fudan University, 200032 Shanghai, China
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