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Paola N, Lauriane U, François R, Hélène H. Limited contribution of the of P2X4 receptor to LPS-induced microglial reaction in mice. Purinergic Signal 2024; 20:521-532. [PMID: 38159160 PMCID: PMC11377396 DOI: 10.1007/s11302-023-09984-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 12/12/2023] [Indexed: 01/03/2024] Open
Abstract
Sepsis is life-threatening condition that can trigger long-term neurological sequelae, including cognitive impairment in survivors. The pathogenesis of the so-called sickness behavior is poorly understood, but sepsis-driven neuroinflammation is thought to play a key role. Microglia are the central nervous system resident immune cells and play major roles in the induction and the control of neuroinflammatory processes. Accordingly, we recently demonstrated important microglia reaction, characterized by dramatic microglia transcriptome remodeling, in an experimental model of sepsis. Interfering with microglia pathways thus represents an interesting opportunity to tune microglia reaction towards beneficial outcomes. Purinergic signaling is central to microglia biology and controls key microglia functions. In particular, P2X4 receptors, which are highly permeable to calcium and de novo expressed in reactive microglia, seem to be an interesting target to modulate microglia reaction. Here, we investigated the impact of P2X4 receptors on the LPS-driven microglia transcriptome remodeling. Although we used complementary and sensitive biostatistical approaches, we did not measure significant impact of P2X4 deficiency onto microglia transcriptome either in homeostatic nor reactive condition. Overall, our results revealed that microglia reaction elicited by LPS-mediated sepsis is P2X4 independent and highlights the functional diversity of microglia reaction. These results also promote for the search of disease-specific targets to tune microglia reaction towards beneficial outcomes.
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Affiliation(s)
- Nobili Paola
- Institute of Functional Genomics, CNRS, INSERM, University of Montpellier, Montpellier, France
- Labex ICST, Montpellier, France
| | - Ulmann Lauriane
- Institute of Functional Genomics, CNRS, INSERM, University of Montpellier, Montpellier, France
- Labex ICST, Montpellier, France
| | - Rassendren François
- Institute of Functional Genomics, CNRS, INSERM, University of Montpellier, Montpellier, France
- Labex ICST, Montpellier, France
| | - Hirbec Hélène
- Institute of Functional Genomics, CNRS, INSERM, University of Montpellier, Montpellier, France.
- Labex ICST, Montpellier, France.
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Gao S, Shen R, Li J, Jiang Y, Sun H, Wu X, Li X, Miao C, He M, Wang J, Chen W. N-acetyltransferase 10 mediates cognitive dysfunction through the acetylation of GABA BR1 mRNA in sepsis-associated encephalopathy. Proc Natl Acad Sci U S A 2024; 121:e2410564121. [PMID: 39190359 PMCID: PMC11388286 DOI: 10.1073/pnas.2410564121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2024] [Accepted: 07/30/2024] [Indexed: 08/28/2024] Open
Abstract
Sepsis-associated encephalopathy (SAE) is a critical neurological complication of sepsis and represents a crucial factor contributing to high mortality and adverse prognosis in septic patients. This study explored the contribution of NAT10-mediated messenger RNA (mRNA) acetylation in cognitive dysfunction associated with SAE, utilizing a cecal ligation and puncture (CLP)-induced SAE mouse model. Our findings demonstrate that CLP significantly upregulates NAT10 expression and mRNA acetylation in the excitatory neurons of the hippocampal dentate gyrus (DG). Notably, neuronal-specific Nat10 knockdown improved cognitive function in septic mice, highlighting its critical role in SAE. Proteomic analysis, RNA immunoprecipitation, and real-time qPCR identified GABABR1 as a key downstream target of NAT10. Nat10 deletion reduced GABABR1 expression, and subsequently weakened inhibitory postsynaptic currents in hippocampal DG neurons. Further analysis revealed that microglia activation and the release of inflammatory mediators lead to the increased NAT10 expression in neurons. Microglia depletion with PLX3397 effectively reduced NAT10 and GABABR1 expression in neurons, and ameliorated cognitive dysfunction induced by SAE. In summary, our findings revealed that after CLP, NAT10 in hippocampal DG neurons promotes GABABR1 expression through mRNA acetylation, leading to cognitive dysfunction.
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Affiliation(s)
- Shenjia Gao
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai 200032, China
| | - Ruling Shen
- Shanghai Laboratory Animal Research Center, Shanghai 201203, China
| | - Jie Li
- Institutes of Brain Science, State Key Laboratory of Medical Neurobiology and Ministry of Education (MOE) Frontiers Center for Brain Science, Shanghai 200032, China
- Department of Neurobiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Yi Jiang
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai 200032, China
| | - Hao Sun
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai 200032, China
| | - Xinyi Wu
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai 200032, China
| | - Xiya Li
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai 200032, China
| | - Changhong Miao
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai 200032, China
| | - Miao He
- Institutes of Brain Science, State Key Laboratory of Medical Neurobiology and Ministry of Education (MOE) Frontiers Center for Brain Science, Shanghai 200032, China
- Department of Neurobiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Jun Wang
- Department of Integrative Medicine and Neurobiology, School of Basic Medical Science, Shanghai Key Laboratory of Acupuncture Mechanism and Acupoint Function, Fudan University, Shanghai 200032, China
| | - Wankun Chen
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai 200032, China
- Department of Anesthesiology, Shanghai Geriatric Medical Center, Shanghai 201104, China
- Department of Anesthesiology, QingPu Branch of Zhongshan Hospital, Fudan University, Shanghai 201799, China
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Nishihara M, Shinohara K, Ikeda S, Akahoshi T, Tsutsui H. Impact of sympathetic hyperactivity induced by brain microglial activation on organ damage in sepsis with chronic kidney disease. J Intensive Care 2024; 12:31. [PMID: 39223624 PMCID: PMC11367766 DOI: 10.1186/s40560-024-00742-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Accepted: 07/12/2024] [Indexed: 09/04/2024] Open
Abstract
BACKGROUND Sympathetic nerve activity (SNA) plays a central role in the pathogenesis of several diseases such as sepsis and chronic kidney disease (CKD). Activation of microglia in the paraventricular nucleus of the hypothalamus (PVN) has been implicated in SNA. The mechanisms responsible for the adverse prognosis observed in sepsis associated with CKD remain to be determined. Therefore, we aimed to clarify the impact of increased SNA resulting from microglial activation on hemodynamics and organ damage in sepsis associated with CKD. METHODS AND RESULTS In protocol 1, male Sprague-Dawley rats underwent either nephrectomy (Nx) or sham surgery followed by cecal ligation and puncture (CLP) or sham surgery. After CLP, Nx-CLP rats exhibited decreased blood pressure, increased heart rate, elevated serum creatinine and bilirubin levels, and decreased platelet count compared to Nx-Sham rats. Heart rate variability analysis revealed an increased low to high frequency (LF/HF) ratio in Nx-CLP rats, indicating increased SNA. Nx-CLP rats also had higher creatinine and bilirubin levels and lower platelet counts than sham-CLP rats after CLP. In protocol 2, Nx-CLP rats were divided into two subgroups: one received minocycline, an inhibitor of microglial activation, while the other received artificial cerebrospinal fluid (CSF) intracerebroventricularly via an osmotic minipump. The minocycline-treated group (Nx-mino-CLP) showed attenuated hypotensive and increased heart rate responses compared to the CSF-treated group (Nx-CSF-CLP), and the LF/HF ratio was also decreased. Echocardiography showed larger left ventricular dimensions and inferior vena cava in the Nx-mino-CLP group. In addition, creatinine and bilirubin levels were lower and platelet counts were higher in the Nx-mino-CLP group compared to the Nx-CSF-CLP group. CONCLUSIONS In septic rats with concomitant CKD, SNA was significantly enhanced and organ dysfunction was increased. It has been suggested that the mechanism of exacerbated organ dysfunction in these models may involve abnormal systemic hemodynamics, possibly triggered by activation of the central sympathetic nervous system through activation of microglia in the PVN.
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Affiliation(s)
- Masaaki Nishihara
- Emergency and Critical Care Center, Kyushu University Hospital, Fukuoka, Japan.
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan.
| | - Keisuke Shinohara
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Shota Ikeda
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Tomohiko Akahoshi
- Emergency and Critical Care Center, Kyushu University Hospital, Fukuoka, Japan
- Department of Advanced Emergency and Disaster medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Hiroyuki Tsutsui
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan
- School of Medicine and Graduate School, International University of Health and Welfare, Fukuoka, Japan
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Ikeda H, Yamagishi A, Yonemochi N, Yamamoto S, Shimizu T, Muto A, Waddington JL, Kamei J. Keratinocyte-Derived Cytokine in the Hippocampus Disrupts Extinction of Conditioned Fear Memory in Tumor-Bearing Mice. Mol Neurobiol 2024; 61:6454-6468. [PMID: 38308664 DOI: 10.1007/s12035-024-03992-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 01/27/2024] [Indexed: 02/05/2024]
Abstract
While patients with cancer show a higher prevalence of psychiatric disorders than the general population, the mechanism underlying this interaction remains unclear. The present study examined whether tumor-bearing (TB) mice show psychological changes using the conditioned fear paradigm and the role of cytokines in these changes. TB mice were established by transplantation with mouse osteosarcoma AXT cells. These TB mice were then found to exhibit disruption in extinction of conditioned fear memory. Eighteen cytokines in serum were increased in TB mice, among which i.c.v. injection of interleukin (IL)-1β and IL-6 strengthened fear memory in normal mice. Contents of IL-17 and keratinocyte-derived cytokine (KC) in the amygdala and KC in the hippocampus were increased in TB mice. KC mRNA in both the amygdala and hippocampus was also increased in TB mice, and i.c.v. injection of KC dose-dependently strengthened fear memory in normal mice. In addition, injection of IL-1β, but not IL-6, increased KC mRNA in the amygdala and hippocampus. In TB mice KC mRNA was increased in both astrocytes and microglia of the amygdala and hippocampus. The microglia inhibitor minocycline, but not the astrocyte inhibitor fluorocitrate, alleviated disruption in extinction of conditioned fear memory in TB mice. Microinjection of KC into the hippocampus, but not into the amygdala, increased fear memory in normal mice. These findings indicate that TB mice show an increase in serum cytokines, including IL-1β, that increases KC production in microglia of the hippocampus, which then disrupts extinction of fear memory.
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Affiliation(s)
- Hiroko Ikeda
- Department of Pathophysiology and Therapeutics, Hoshi University School of Pharmacy and Pharmaceutical Sciences, 2-4-41 Ebara, Shinagawa-ku, Tokyo, 142-8501, Japan.
| | - Aimi Yamagishi
- Department of Pathophysiology and Therapeutics, Hoshi University School of Pharmacy and Pharmaceutical Sciences, 2-4-41 Ebara, Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Naomi Yonemochi
- Department of Pathophysiology and Therapeutics, Hoshi University School of Pharmacy and Pharmaceutical Sciences, 2-4-41 Ebara, Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Shogo Yamamoto
- Department of Pathophysiology and Therapeutics, Hoshi University School of Pharmacy and Pharmaceutical Sciences, 2-4-41 Ebara, Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Takatsune Shimizu
- Department of Pathophysiology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, 2-4-41 Ebara, Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Akihiro Muto
- Department of Pathophysiology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, 2-4-41 Ebara, Shinagawa-ku, Tokyo, 142-8501, Japan
| | - John L Waddington
- School of Pharmacy and Biomolecular Sciences, RCSI University of Medicine and Health Sciences, 111 St Stephen's Green, Dublin 2, Ireland
| | - Junzo Kamei
- Department of Pathophysiology and Therapeutics, Hoshi University School of Pharmacy and Pharmaceutical Sciences, 2-4-41 Ebara, Shinagawa-ku, Tokyo, 142-8501, Japan
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Peng S, Sun T, Yang D, Zhao H, Lin L, Xia B, Li M, Piao M, Shi Z, Tuo Q. Dipsacoside B ameliorates cognitive impairment in sepsis-associated encephalopathy by reducing Th17 cell infiltration and neuroinflammation. Biochem Pharmacol 2024; 227:116428. [PMID: 39009096 DOI: 10.1016/j.bcp.2024.116428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 06/24/2024] [Accepted: 07/12/2024] [Indexed: 07/17/2024]
Abstract
Sepsis-associated encephalopathy (SAE) is the main cause of cognitive impairment in patients with sepsis. The infiltration of inflammatory signals into the central nervous system (CNS) via the compromised blood-brain barrier (BBB) represents a crucial step in the pathological progression of SAE. In particular, T-helper 17 cell (Th17 cells) has been suggested to be highly correlated with the activation of central immune responses. Thus, preventing Th17 cell infiltration into the CNS may be a possible strategy to alleviate cognitive decline in SAE. Dipsacoside B (DB) is one of the primary active components in Chuan Xu Duan (Dipsacus asper Wall). We speculate that DB may be a potential candidate for the treatment of SAE-related cognitive deficits. In the present study, we demonstrated that DB could effectively alleviate cognitive impairment in SAE mice. DB significantly suppressed the central inflammatory response induced by repeated lipopolysaccharide (LPS) injection. The mechanism underlying its therapeutic effect should be attributed to the reduction of BBB impairment and pathogenic Th17 cell infiltration into the CNS by inhibition of vascular endothelial growth factor A (VEGFA)/ Vascular endothelial growth factor receptor 2(VEGFR2)/ Endothelial nitric oxide synthase (eNOS) signaling. Our findings suggest that DB is a potential candidate for the treatment of SAE-related cognitive dysfunction.
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Affiliation(s)
- Sha Peng
- Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, School of Pharmacy, Hunan University of Chinese Medicine, 410208 Changsha, Hunan, China; Key Laboratory of Vascular Biology and Translational Medicine, Hunan University of Chinese Medicine, 410208 Changsha, Hunan, China
| | - Taoli Sun
- Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, School of Pharmacy, Hunan University of Chinese Medicine, 410208 Changsha, Hunan, China; Key Laboratory of Vascular Biology and Translational Medicine, Hunan University of Chinese Medicine, 410208 Changsha, Hunan, China
| | - Dongmei Yang
- Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, School of Pharmacy, Hunan University of Chinese Medicine, 410208 Changsha, Hunan, China; Key Laboratory of Vascular Biology and Translational Medicine, Hunan University of Chinese Medicine, 410208 Changsha, Hunan, China; Basic Research Center of Integrated Chinese and Western medicine on prevention and treatment of vascular diseases, Medical School, Hunan University of Chinese Medicine, 410208 Changsha, Hunan, China
| | - Hongqing Zhao
- Science & Technology Innovation Center, Hunan University of Chinese Medicine, 410208 Changsha, Hunan, China
| | - Limei Lin
- Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, School of Pharmacy, Hunan University of Chinese Medicine, 410208 Changsha, Hunan, China
| | - Bohou Xia
- Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, School of Pharmacy, Hunan University of Chinese Medicine, 410208 Changsha, Hunan, China
| | - Minjie Li
- Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, School of Pharmacy, Hunan University of Chinese Medicine, 410208 Changsha, Hunan, China
| | - Meihong Piao
- Key Laboratory of Vascular Biology and Translational Medicine, Hunan University of Chinese Medicine, 410208 Changsha, Hunan, China; Basic Research Center of Integrated Chinese and Western medicine on prevention and treatment of vascular diseases, Medical School, Hunan University of Chinese Medicine, 410208 Changsha, Hunan, China
| | - Zhe Shi
- Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, School of Pharmacy, Hunan University of Chinese Medicine, 410208 Changsha, Hunan, China.
| | - Qinhui Tuo
- Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, School of Pharmacy, Hunan University of Chinese Medicine, 410208 Changsha, Hunan, China; Key Laboratory of Vascular Biology and Translational Medicine, Hunan University of Chinese Medicine, 410208 Changsha, Hunan, China; Basic Research Center of Integrated Chinese and Western medicine on prevention and treatment of vascular diseases, Medical School, Hunan University of Chinese Medicine, 410208 Changsha, Hunan, China.
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6
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Yang YS, Liu CY, Pei MQ, Sun ZD, Lin S, He HF. Quercetin protects against sepsis-associated encephalopathy by inhibiting microglia-neuron crosstalk via the CXCL2/CXCR2 signaling pathway. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2024; 134:155987. [PMID: 39216299 DOI: 10.1016/j.phymed.2024.155987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 08/15/2024] [Accepted: 08/25/2024] [Indexed: 09/04/2024]
Abstract
BACKGROUND Sepsis-associated encephalopathy (SAE) is a common brain lesion associated with severe sepsis, for which ferroptosis is a key driving factor. Thus, suppressing ferroptosis may be an effective strategy for treating SAE. Quercetin (QUE) is a natural flavonoid with antioxidant and anti-inflammatory properties. However, its role on ferroptosis in SAE remains unclear. PURPOSE This study aimed to investigate the mechanism underlying the therapeutic effect of QUE on cecal ligation perforation (CLP)-induced SAE. METHODS In vivo and in vitro SAE models were established using CLP and lipopolysaccharide (LPS), respectively. Both models underwent pre-treatment with QUE. RESULTS QUE attenuated CLP-induced symptoms, including temperature changes, neurological severity scores, learning and memory dysfunction, inflammatory cytokine release, and microglia activation in SAE mice, and inhibited LPS-induced microglia recruitment and chemotaxis. Bioinformatics analysis revealed that the C-X-C motif chemokine ligand 2 (CXCL2)/C-X-C motif chemokine receptor 2 (CXCR2) axis may play a key role in QUE-mediated protection against SAE. Moreover, QUE significantly inhibited LPS-induced CXCL2 up-regulation and protein secretion from microglia. Recombinant mouse-derived CXCL2 (rmCXCL2) promoted inflammatory cytokine secretion, NF-κB/NLRP3 signaling activation, and microglia recruitment and chemotaxis. Furthermore, rmCXCL2 induced ferroptosis in mouse hippocampal neurons, as evidenced by elevated malondialdehyde levels, decreased glutathione levels, excessive iron uptake, and altered ferroptosis-related protein expression. The CXCR2 antagonist SB225002 effectively reversed the effects of rmCXCL2. Importantly, in vivo experiments further demonstrated that the therapeutic effect of QUE on SAE was inhibited by rmCXCL2. CONCLUSION This study demonstrates that CXCL2 secreted by activated microglia mediates microglia self-activation and induces hippocampal neuronal ferroptosis via CXCR2 and that QUE exerts neuroprotective effects on SAE by blocking interactions between microglia and neurons via CXCL2/CXCR2 pathway inhibition.
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Affiliation(s)
- Yu-Shen Yang
- Department of Anesthesiology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
| | - Chu-Yun Liu
- Department of Anesthesiology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
| | - Meng-Qin Pei
- Department of Anesthesiology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
| | - Zhen-Dong Sun
- Department of Anesthesiology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
| | - Shu Lin
- Centre of Neurological and Metabolic Research, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China; Neuroendocrinology Group, Garvan Institute of Medical Research, Darlinghurst, Australia.
| | - He-Fan He
- Department of Anesthesiology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China.
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Garbossa L, Joaquim L, Danielski LG, Goldim MPDS, Machado RS, Metzker K, Bernades G, Lanzzarin E, Bagio E, Farias AD, Rosa ND, Medeiros FDD, Carli RJD, Oliveira BH, Ferreira NC, Palandi J, Bobinski F, Martins DF, Fortunato JJ, Barichello T, Petronilho F. The effect of modafinil on passive avoidance memory, brain level of BDNF and oxidative stress markers in sepsis survivor rats. Int J Neurosci 2024; 134:849-857. [PMID: 36448768 DOI: 10.1080/00207454.2022.2154076] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 08/25/2021] [Accepted: 11/10/2021] [Indexed: 12/03/2022]
Abstract
Material and method: Male Wistar rats (250-350g) were submitted to CLP, or sham as control, and divided into the sham + water, sham + MD (300 mg/kg), CLP + water, and CLP + MD (300 mg/kg) groups. Ten days after the administration of MD and CLP, the rats were submitted to a memory test by passive avoidance apparatus being sacrificed. The nitrite and nitrate (N/N) concentration, myeloperoxidase (MPO) and catalase (CAT) activity, lipid and protein oxidative damage, and brain-derived neurotrophic factor (BDNF) levels were measured in the prefrontal cortex and hippocampus. Results: The passive avoidance test verified an increase in the latency time compared training and test section in the groups sham + water and CLP + MD. Decreased N/N concentration and MPO activity were verified in the prefrontal cortex of rats submitted to CLP and MD treatment, as well as reduced protein and lipid oxidative damage in the hippocampus, which was accompanied by increased CAT activity and BDNF levels.Conclusion: Our data indicate the role of MD in attenuating oxidative stress parameters, the alteration of BDNF, and an improvement in memory impairment in rats ten days after induction of sepsis.
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Affiliation(s)
- Leandro Garbossa
- Programa de Pos graduação em Ciências da Saúde, University of Southern Santa Catarina (UNISUL), Tubarão, Brazil
| | - Larissa Joaquim
- Programa de Pos graduação em Ciências da Saúde, University of Southern Santa Catarina (UNISUL), Tubarão, Brazil
| | - Lucineia Gainski Danielski
- Laboratory of Experimental Neurology, Graduate Program in Health Sciences, Health Sciences Unit, University of Southern Santa Catarina (UNESC), Criciúma, Brazil
| | | | - Richard Simon Machado
- Programa de Pos graduação em Ciências da Saúde, University of Southern Santa Catarina (UNISUL), Tubarão, Brazil
| | - Kiuanne Metzker
- Programa de Pos graduação em Ciências da Saúde, University of Southern Santa Catarina (UNISUL), Tubarão, Brazil
| | - Gabriela Bernades
- Programa de Pos graduação em Ciências da Saúde, University of Southern Santa Catarina (UNISUL), Tubarão, Brazil
| | - Everton Lanzzarin
- Programa de Pos graduação em Ciências da Saúde, University of Southern Santa Catarina (UNISUL), Tubarão, Brazil
| | - Erick Bagio
- Programa de Pos graduação em Ciências da Saúde, University of Southern Santa Catarina (UNISUL), Tubarão, Brazil
| | - Adriele de Farias
- Programa de Pos graduação em Ciências da Saúde, University of Southern Santa Catarina (UNISUL), Tubarão, Brazil
| | - Naiana da Rosa
- Programa de Pos graduação em Ciências da Saúde, University of Southern Santa Catarina (UNISUL), Tubarão, Brazil
| | - Fabiana Durante de Medeiros
- Programa de Pos graduação em Ciências da Saúde, University of Southern Santa Catarina (UNISUL), Tubarão, Brazil
| | - Raquel Jaconi de Carli
- Programa de Pos graduação em Ciências da Saúde, University of Southern Santa Catarina (UNISUL), Tubarão, Brazil
| | - Bruna Hoffman Oliveira
- Experimental Neuroscience Laboratory (LaNEx), Graduate Program in Health Sciences, University of Southern Santa Catarina (UNISUL), Palhoça, Brazil
| | - Nivaldo Correia Ferreira
- Experimental Neuroscience Laboratory (LaNEx), Graduate Program in Health Sciences, University of Southern Santa Catarina (UNISUL), Palhoça, Brazil
| | - Juliete Palandi
- Experimental Neuroscience Laboratory (LaNEx), Graduate Program in Health Sciences, University of Southern Santa Catarina (UNISUL), Palhoça, Brazil
| | - Franciane Bobinski
- Experimental Neuroscience Laboratory (LaNEx), Graduate Program in Health Sciences, University of Southern Santa Catarina (UNISUL), Palhoça, Brazil
| | - Daniel Fernandes Martins
- Experimental Neuroscience Laboratory (LaNEx), Graduate Program in Health Sciences, University of Southern Santa Catarina (UNISUL), Palhoça, Brazil
| | - Jucelia Jeremias Fortunato
- Programa de Pos graduação em Ciências da Saúde, University of Southern Santa Catarina (UNISUL), Tubarão, Brazil
| | - Tatiana Barichello
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, Health Sciences Unit, University of Southern Santa Catarina (UNESC), Criciúma, Brazil
- Center of Excellence on Mood Disorders, Department of Psychiatry and Behavioral Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, TX, USA
- Translational Psychiatry Program, Department of Psychiatry and Behavioral Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, TX, USA
| | - Fabricia Petronilho
- Laboratory of Experimental Neurology, Graduate Program in Health Sciences, Health Sciences Unit, University of Southern Santa Catarina (UNESC), Criciúma, Brazil
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Fang Y, Dou A, Shen Y, Li T, Liu H, Cui Y, Xie K. Association of triglyceride-glucose index and delirium in patients with sepsis: a retrospective study. Lipids Health Dis 2024; 23:227. [PMID: 39054513 PMCID: PMC11271053 DOI: 10.1186/s12944-024-02213-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2024] [Accepted: 07/12/2024] [Indexed: 07/27/2024] Open
Abstract
OBJECTIVE It is well known that glucose and lipid metabolism disorders and insulin resistance are common in sepsis, which affect the occurrence and prognosis of multiple organ dysfunction in septic patients. Previous study reported the predictive value of triglyceride-glucose index (TyG), a clinical indicator for insulin resistance, in postoperative delirium patients. However, it remains unclear whether the TyG index is a novel predictive biomarker for sepsis-associated delirium. The aim of this study is to explore the relationship between TyG index and the risk of delirium in patients with sepsis. METHODS Adult septic patients were identified from the MIMIC-IV database and divided into four groups based on the mean value of TyG. The primary outcome was the incidence of delirium. The association between TyG and the risk of developing delirium was evaluated by restricted cubic spline (RCS), multivariate logistic regression and subgroup analysis. Propensity Score Matching (PSM) method was used to balance the baseline data. RESULTS A total of 3,331 septic patients were included in the analysis, and further divided into four groups: Q1 (TyG ≤ 8.67), Q2 (8.67 < TyG ≤ 9.08), Q3 (9.08 < TyG ≤ 9.61), and Q4 (TyG > 9.61). The RCS curves demonstrated a non-linear positive relationship between TyG index and the risk of developing delirium, and an optimal cut-of value 9.09 was recommended. After balancing the baseline information by PSM, patients in the TyG > 9.09 group had a significant higher incidence of delirium compared with those in the TyG ≤ 9.09 group. In logistic regression analysis, TyG > 9.09 was significantly associated with lower risk of developing delirium in both original cohort (OR 1.54-1.78, all P < 0.001) and the PSM cohort (OR 1.41-1.48, all P < 0.001). No association was found between the TyG index and mortality (all P > 0.05). In subgroup analysis, our findings were consistent (all OR > 1 in all subgroups). CONCLUSION Our study demonstrated an independent association between TyG index and increased risk of delirium in septic patients, indicating that TyG index can serve as a biomarker for delirium in sepsis.
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Affiliation(s)
- Yipeng Fang
- Department of Critical Care Medicine, Tianjin Institute of Anesthesiology, Tianjin Medical University General Hospital, 154th Anshan Road, Tianjin, 300052, China
| | - Aizhen Dou
- Department of Critical Care Medicine, Tianjin Institute of Anesthesiology, Tianjin Medical University General Hospital, 154th Anshan Road, Tianjin, 300052, China
| | - Yuehao Shen
- Department of Critical Care Medicine, Tianjin Institute of Anesthesiology, Tianjin Medical University General Hospital, 154th Anshan Road, Tianjin, 300052, China
| | - Tianyu Li
- Department of Critical Care Medicine, Tianjin Institute of Anesthesiology, Tianjin Medical University General Hospital, 154th Anshan Road, Tianjin, 300052, China
| | - Haiying Liu
- Department of Critical Care Medicine, Tianjin Institute of Anesthesiology, Tianjin Medical University General Hospital, 154th Anshan Road, Tianjin, 300052, China
| | - Yan Cui
- Department of Critical Care Medicine, Tianjin Institute of Anesthesiology, Tianjin Medical University General Hospital, 154th Anshan Road, Tianjin, 300052, China.
- Department of Pathogen Biology, School of Basic Medical Sciences, Tianjin Medical University, No. 22, Qixiangtai Road, Heping District, Tianjin, 300070, China.
| | - Keliang Xie
- Department of Critical Care Medicine, Tianjin Institute of Anesthesiology, Tianjin Medical University General Hospital, 154th Anshan Road, Tianjin, 300052, China.
- Department of Anesthesiology, Tianjin Institute of Anesthesiology, Tianjin Medical University General Hospital, Tianjin, 300052, China.
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9
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Joaquim LS, Steiner B, Farias B, Machado RS, Danielski LG, Mathias K, Stork S, Lanzzarin E, Novaes L, Bonfante S, Generoso JDS, Alano CG, Lemos I, Dominguini D, Giustina AD, Catalão CHR, Streck EL, Giridharan VV, Dal-Pizzol F, Barichello T, de Bitencourt RM, Petronilho F. Sepsis compromises post-ischemic stroke neurological recovery and is associated with sex differences. Life Sci 2024; 349:122721. [PMID: 38754813 DOI: 10.1016/j.lfs.2024.122721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 05/03/2024] [Accepted: 05/13/2024] [Indexed: 05/18/2024]
Abstract
AIMS Infection is a complication after stroke and outcomes vary by sex. Thus, we investigated if sepsis affects brain from ischemic stroke and sex involvement. MAIN METHODS Male and female Wistar rats, were submitted to middle cerebral artery occlusion (MCAO) and after 7 days sepsis to cecal ligation and perforation (CLP). Infarct size, neuroinflammation, oxidative stress, and mitochondrial activity were quantified 24 h after CLP in the prefrontal cortex and hippocampus. Survival and neurological score were assessed up to 15 days after MCAO or 8 days after CLP (starting at 2 h after MCAO) and memory at the end. KEY FINDINGS CLP decreased survival, increased neurological impairments in MCAO females. Early, in male sepsis following MCAO led to increased glial activation in the brain structures, and increased TNF-α and IL-1β in the hippocampus. All groups had higher IL-6 in both tissues, but the hippocampus had lower IL-10. CLP potentiated myeloperoxidase (MPO) in the prefrontal cortex of MCAO male and female. In MCAO+CLP, only male increased MPO and nitrite/nitrate in hippocampus. Males in all groups had protein oxidation in the prefrontal cortex, but only MCAO+CLP in the hippocampus. Catalase decreased in the prefrontal cortex and hippocampus of all males and females, and MCAO+CLP only increased this activity in males. Female MCAO+CLP had higher prefrontal cortex complex activity than males. In MCAO+CLP-induced long-term memory impairment only in females. SIGNIFICANCE The parameters evaluated for early sepsis after ischemic stroke show a worse outcome for males, while females are affected during long-term follow-up.
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Affiliation(s)
- Larissa Silva Joaquim
- Laboratory of Neurobiology of Inflammatory and Metabolic Processes, Graduate Program in Health Sciences, Health Sciences Unit, University of South Santa Catarina, Tubarao, SC, Brazil; Laboratory of Experimental Neurology, Graduate Program in Health Sciences, University of Southern Santa Catarina, Criciuma, SC, Brazil
| | - Beatriz Steiner
- Laboratory of Neurobiology of Inflammatory and Metabolic Processes, Graduate Program in Health Sciences, Health Sciences Unit, University of South Santa Catarina, Tubarao, SC, Brazil
| | - Brenno Farias
- Laboratory of Neurobiology of Inflammatory and Metabolic Processes, Graduate Program in Health Sciences, Health Sciences Unit, University of South Santa Catarina, Tubarao, SC, Brazil
| | - Richard Simon Machado
- Laboratory of Neurobiology of Inflammatory and Metabolic Processes, Graduate Program in Health Sciences, Health Sciences Unit, University of South Santa Catarina, Tubarao, SC, Brazil; Laboratory of Experimental Neurology, Graduate Program in Health Sciences, University of Southern Santa Catarina, Criciuma, SC, Brazil
| | - Lucineia Gainski Danielski
- Laboratory of Experimental Neurology, Graduate Program in Health Sciences, University of Southern Santa Catarina, Criciuma, SC, Brazil; Faillace Department of Psychiatry and Behavioral Sciences, Translational Psychiatry Program, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, TX, USA
| | - Khiany Mathias
- Laboratory of Neurobiology of Inflammatory and Metabolic Processes, Graduate Program in Health Sciences, Health Sciences Unit, University of South Santa Catarina, Tubarao, SC, Brazil; Laboratory of Experimental Neurology, Graduate Program in Health Sciences, University of Southern Santa Catarina, Criciuma, SC, Brazil
| | - Solange Stork
- Laboratory of Neurobiology of Inflammatory and Metabolic Processes, Graduate Program in Health Sciences, Health Sciences Unit, University of South Santa Catarina, Tubarao, SC, Brazil; Laboratory of Experimental Neurology, Graduate Program in Health Sciences, University of Southern Santa Catarina, Criciuma, SC, Brazil
| | - Everton Lanzzarin
- Laboratory of Neurobiology of Inflammatory and Metabolic Processes, Graduate Program in Health Sciences, Health Sciences Unit, University of South Santa Catarina, Tubarao, SC, Brazil
| | - Linerio Novaes
- Laboratory of Neurobiology of Inflammatory and Metabolic Processes, Graduate Program in Health Sciences, Health Sciences Unit, University of South Santa Catarina, Tubarao, SC, Brazil
| | - Sandra Bonfante
- Laboratory of Neurobiology of Inflammatory and Metabolic Processes, Graduate Program in Health Sciences, Health Sciences Unit, University of South Santa Catarina, Tubarao, SC, Brazil; Laboratory of Experimental Neurology, Graduate Program in Health Sciences, University of Southern Santa Catarina, Criciuma, SC, Brazil
| | - Jaqueline da Silva Generoso
- Laboratory of Experimental Neurology, Graduate Program in Health Sciences, University of Southern Santa Catarina, Criciuma, SC, Brazil
| | - Carolina Giassi Alano
- Laboratory of Experimental Biomedicine, Graduate Program in Health Sciences, University of Southern Santa Catarina, Criciuma, SC, Brazil
| | - Isabela Lemos
- Laboratory of Experimental Biomedicine, Graduate Program in Health Sciences, University of Southern Santa Catarina, Criciuma, SC, Brazil
| | - Diogo Dominguini
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina, Criciuma, SC, Brazil
| | - Amanda Della Giustina
- Ottawa Hospital Research Institute, Sprott Centre for Stem Cell Research, Ottawa, ON, Canada
| | - Carlos Henrique Rocha Catalão
- Department of Neurosciences and Behavioral Sciences, Ribeirao Preto Medical School, University of São Paulo (USP), Ribeirao Preto, SP, Brazil
| | - Emilio Luiz Streck
- Laboratory of Experimental Biomedicine, Graduate Program in Health Sciences, University of Southern Santa Catarina, Criciuma, SC, Brazil
| | - Vijayasree V Giridharan
- Faillace Department of Psychiatry and Behavioral Sciences, Translational Psychiatry Program, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, TX, USA
| | - Felipe Dal-Pizzol
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina, Criciuma, SC, Brazil
| | - Tatiana Barichello
- Laboratory of Experimental Neurology, Graduate Program in Health Sciences, University of Southern Santa Catarina, Criciuma, SC, Brazil; Faillace Department of Psychiatry and Behavioral Sciences, Translational Psychiatry Program, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, TX, USA
| | - Rafael Mariano de Bitencourt
- Laboratory of Neurobiology of Inflammatory and Metabolic Processes, Graduate Program in Health Sciences, Health Sciences Unit, University of South Santa Catarina, Tubarao, SC, Brazil
| | - Fabricia Petronilho
- Laboratory of Experimental Neurology, Graduate Program in Health Sciences, University of Southern Santa Catarina, Criciuma, SC, Brazil.
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10
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Zhou Y, Bai L, Tang W, Yang W, Sun L. Research progress in the pathogenesis of sepsis-associated encephalopathy. Heliyon 2024; 10:e33458. [PMID: 39027435 PMCID: PMC11254713 DOI: 10.1016/j.heliyon.2024.e33458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 06/18/2024] [Accepted: 06/21/2024] [Indexed: 07/20/2024] Open
Abstract
Sepsis is a syndrome that causes dysfunction of multiple organs due to the host's uncontrolled response to infection and is a significant contributor to morbidity and mortality in intensive care units worldwide. Surviving patients are often left with acute brain injury and long-term cognitive impairment, known as sepsis-associated encephalopathy (SAE). In recent years, researchers have directed their focus towards the pathogenesis of SAE. However, due to the complexity of its development, there remains a lack of effective treatment measures that arise as a serious issue affecting the prognosis of sepsis patients. Further research on the possible causes of SAE aims to provide clinicians with potential therapeutic targets and help develop targeted prevention strategies. This paper aims to review recent research on the pathogenesis of SAE, in order to enhance our understanding of this syndrome.
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Affiliation(s)
- Yue Zhou
- Teaching Department, First Hospital of Jilin University, Changchun, 130021, China
| | - Lu Bai
- Department of Medical Oncology, Dalian NO.3 People's Hospital, Dalian, 116091, China
| | - Wenjing Tang
- Department of Emergency Medicine, First Hospital of Jilin University, Changchun, 130021, China
| | - Weiying Yang
- Department of Emergency Medicine, First Hospital of Jilin University, Changchun, 130021, China
| | - Lichao Sun
- Department of Emergency Medicine, First Hospital of Jilin University, Changchun, 130021, China
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11
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Dal-Pizzol F, Coelho A, Simon CS, Michels M, Corneo E, Jeremias A, Damásio D, Ritter C. Prophylactic Minocycline for Delirium in Critically Ill Patients: A Randomized Controlled Trial. Chest 2024; 165:1129-1138. [PMID: 38043911 DOI: 10.1016/j.chest.2023.11.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 11/20/2023] [Accepted: 11/21/2023] [Indexed: 12/05/2023] Open
Abstract
BACKGROUND Delirium is a potentially severe form of acute encephalopathy. Minocycline has neuroprotective effects in animal models of neurologic diseases; however, data from human studies remain scarce. RESEARCH QUESTION Does the neuroprotective effect of minocycline prevent delirium occurrence in critically ill patients? STUDY DESIGN AND METHODS This study was a randomized, placebo-controlled, double-anonymized trial conducted in four ICUs. Patients aged 18 years or older were eligible and randomized to receive minocycline (100 mg, twice daily) or placebo. The primary outcome was delirium incidence within 28 days or before ICU discharge. Secondary outcomes included days in delirium during ICU stay, delirium/coma-free days, length of mechanical ventilation, ICU length of stay, ICU mortality, and hospital mortality. The kinetics of various inflammatory (IL-1β, IL-6, IL-10, and C-reactive protein) and brain-related biomarkers (brain-derived neurotrophic factor and S100B) were used as exploratory outcomes. RESULTS A total of 160 patients were randomized, but one patient in the placebo group died before treatment; thus the data from 159 patients were analyzed (minocycline, n = 84; placebo, n = 75). After the COVID-19 pandemic it was decided to stop patient inclusion early. There was a small but significant decrease in delirium incidence: 17 patients (20%) in the minocycline arm compared with 26 patients (35%) in the placebo arm (P = .043). No other delirium-related outcomes were modified by minocycline treatment. Unexpectedly, there was a significant decrease in hospital mortality (39% vs. 23%; P = .029). Among all analyzed biomarkers, only plasma levels of C-reactive protein decreased significantly after minocycline treatment (F = 0.75, P = .78, within time; F = 4.09, P = .045, group × time). INTERPRETATION Our findings in this rather small study signal a possible positive effect of minocycline on delirium incidence. Further studies are needed to confirm the benefits of this drug as a preventive measure in critically ill patients. CLINICAL TRIAL REGISTRATION ClinicalTrials.gov; No.: NCT04219735; URL: www. CLINICALTRIALS gov.
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Affiliation(s)
- Felipe Dal-Pizzol
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, Universidade do Extremo Sul Catarinense, Criciúma, Brazil; Intensive Care Unit, São José Hospital, Criciúma, Brazil; São José Hospital Research Center, Criciúma, Brazil.
| | - André Coelho
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, Universidade do Extremo Sul Catarinense, Criciúma, Brazil; Intensive Care Unit, São José Hospital, Criciúma, Brazil
| | - Carla S Simon
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, Universidade do Extremo Sul Catarinense, Criciúma, Brazil
| | - Monique Michels
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, Universidade do Extremo Sul Catarinense, Criciúma, Brazil
| | - Emily Corneo
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, Universidade do Extremo Sul Catarinense, Criciúma, Brazil
| | | | | | - Cristiane Ritter
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, Universidade do Extremo Sul Catarinense, Criciúma, Brazil; Intensive Care Unit, São José Hospital, Criciúma, Brazil
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12
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Zhu Q, Wan L, Huang H, Liao Z. IL-1β, the first piece to the puzzle of sepsis-related cognitive impairment? Front Neurosci 2024; 18:1370406. [PMID: 38665289 PMCID: PMC11043581 DOI: 10.3389/fnins.2024.1370406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Accepted: 04/02/2024] [Indexed: 04/28/2024] Open
Abstract
Sepsis is a leading cause of death resulting from an uncontrolled inflammatory response to an infectious agent. Multiple organ injuries, including brain injuries, are common in sepsis. The underlying mechanism of sepsis-associated encephalopathy (SAE), which is associated with neuroinflammation, is not yet fully understood. Recent studies suggest that the release of interleukin-1β (IL-1β) following activation of microglial cells plays a crucial role in the development of long-lasting neuroinflammation after the initial sepsis episode. This review provides a comprehensive analysis of the recent literature on the molecular signaling pathways involved in microglial cell activation and interleukin-1β release. It also explores the physiological and pathophysiological role of IL-1β in cognitive function, with a particular focus on its contribution to long-lasting neuroinflammation after sepsis. The findings from this review may assist healthcare providers in developing novel interventions against SAE.
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Affiliation(s)
- Qing Zhu
- Department of Anesthesiology, Key Laboratory of Birth Defects and Related Diseases of Women and Children, West China Second University Hospital, Sichuan University, Chengdu, China
| | - Li Wan
- Department of Medical Genetics/Prenatal Diagnostic Center Nursing and Key Laboratory of Birth Defects and Related Diseases of Women and Children, West China Second University Hospital of Sichuan University, Chengdu, China
| | - Han Huang
- Department of Anesthesiology, Key Laboratory of Birth Defects and Related Diseases of Women and Children, West China Second University Hospital, Sichuan University, Chengdu, China
| | - Zhimin Liao
- Department of Anesthesiology, Key Laboratory of Birth Defects and Related Diseases of Women and Children, West China Second University Hospital, Sichuan University, Chengdu, China
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13
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Yu Z, Shi H, Zhang J, Ma C, He C, Yang F, Zhao L. ROLE OF MICROGLIA IN SEPSIS-ASSOCIATED ENCEPHALOPATHY PATHOGENESIS: AN UPDATE. Shock 2024; 61:498-508. [PMID: 38150368 DOI: 10.1097/shk.0000000000002296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2023]
Abstract
ABSTRACT Sepsis-associated encephalopathy (SAE) is a serious complication of sepsis, which is characterized by cognitive dysfunction, a poor prognosis, and high incidences of morbidity and mortality. Substantial levels of systemic inflammatory factors induce neuroinflammatory responses during sepsis, ultimately disrupting the central nervous system's (CNS) homeostasis. This disruption results in brain dysfunction through various underlying mechanisms, contributing further to SAE's development. Microglia, the most important macrophage in the CNS, can induce neuroinflammatory responses, brain tissue injury, and neuronal dysregulation, resulting in brain dysfunction. They serve an important regulatory role in CNS homeostasis and can be activated through multiple pathways. Consequently, activated microglia are involved in several pathogenic mechanisms related to SAE and play a crucial role in its development. This article discusses the role of microglia in neuroinflammation, dysfunction of neurotransmitters, disruption of the blood-brain barrier, abnormal control of cerebral blood flow, mitochondrial dysfunction, and reduction in the number of good bacteria in the gut as main pathogenic mechanisms of SAE and focuses on studies targeting microglia to ameliorate SAE to provide a theoretical basis for targeted microglial therapy for SAE.
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Affiliation(s)
| | - Hui Shi
- Department of Critical Care Medicine, Chifeng Municipal Hospital, Chifeng Clinical Medical College of Inner Mongolia Medical University, Chifeng, China
| | - Jingjing Zhang
- Department of Central Laboratory, Chifeng Municipal Hospital, Chifeng Clinical Medical College of Inner Mongolia Medical University, Chifeng, China
| | - Chunhan Ma
- Chifeng Clinical Medical College of Inner Mongolia Medical University, Hohhot, China
| | - Chen He
- Chifeng Clinical Medical College of Inner Mongolia Medical University, Hohhot, China
| | - Fei Yang
- Department of Critical Care Medicine, Chifeng Municipal Hospital, Chifeng Clinical Medical College of Inner Mongolia Medical University, Chifeng, China
| | - Lina Zhao
- Department of Critical Care Medicine, General Hospital of Tianjin Medical University, Tianjin, China
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14
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Zhao Y, Jiang Y, Shen Y, Su LD. Sepsis Impairs Purkinje Cell Functions and Motor Behaviors Through Microglia Activation. CEREBELLUM (LONDON, ENGLAND) 2024; 23:329-339. [PMID: 36790600 DOI: 10.1007/s12311-023-01531-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/09/2023] [Indexed: 02/16/2023]
Abstract
The most common clinical manifestation of sepsis-related encephalopathy (SAE) is the deterioration of cognitive function. Besides, increasing evidence shows that SAE patients exhibit coordination and sensorimotor dysfunctions, suggesting that SAE affects motor function with unclear mechanism. In the present work, we explored the effects of SAE on cerebellar Purkinje cells (PCs) using cecal ligation and perforation (CLP), a standard model for inducing sepsis symptoms similar to those in human patients. Our results show that the sepsis can activate microglia in the cerebellum and promote the secretion of inflammatory factor TNF-α, which increases intrinsic excitability and synaptic transmission of PCs, inhibits the synaptic plasticity of PCs, and impairs motor learning of mice. These findings address how SAE changes PC functions, and thereby are of great significance to reveal pathophysiological feathers of human patients suffering from SAE.
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Affiliation(s)
- Yue Zhao
- Department of Physiology and Neuroscience Care Unit, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310009, China
| | - Yao Jiang
- Department of Physiology and Neuroscience Care Unit, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310009, China
| | - Ying Shen
- Department of Physiology and Neuroscience Care Unit, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310009, China.
| | - Li-Da Su
- Department of Physiology and Neuroscience Care Unit, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310009, China.
- Key Laboratory of the Diagnosis and Treatment of Severe Trauma and Burn of Zhejiang Province, Hangzhou, 310009, China.
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15
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Hosseini M, Bardaghi Z, Askarpour H, Jafari MM, Golkar A, Shirzad S, Rajabian A, Salmani H. Minocycline mitigated enduring neurological consequences in the mice model of sepsis. Behav Brain Res 2024; 461:114856. [PMID: 38199318 DOI: 10.1016/j.bbr.2024.114856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/02/2024] [Accepted: 01/04/2024] [Indexed: 01/12/2024]
Abstract
AIM Sepsis-associated encephalopathy is a frequently observed consequence of sepsis, often resulting in chronic brain inflammation and injury, ultimately leading to a range of behavioral abnormalities. This study explores the potential preventive effects of minocycline on the long-lasting outcome of sepsis in a mice model of sepsis. METHODS Adult male C57 mice were subjected to experimental sepsis through a single intraperitoneal injection of 5 mg/kg lipopolysaccharide (LPS). Minocycline administration via oral gavage (12.5, 25, and 50 mg/kg) commenced three days before sepsis induction and continued on the day of induction. Mice underwent behavioral assessments one month post-sepsis, with subsequent brain tissue analysis to investigate oxidative stress markers and cholinergic function. KEY FINDINGS One month following sepsis induction, mice exhibited significant anxiety- and depressive-like behaviors as determined by assessments in the elevated plus maze (EPM), open field, and tail suspension test (TST). Additionally, they displayed impaired recognition memory in the novel object recognition (NOR) test. Brain tissue analysis revealed a notable increase in oxidative stress markers and acetylcholinesterase (AChE) activity in septic mice. Notably, minocycline treatment effectively mitigated the long-term behavioral abnormalities resulting from sepsis, attenuated oxidative stress markers, and reduced AChE activity. SIGNIFICANCE These findings underscore the potential of minocycline as a therapeutic intervention during sepsis induction to prevent the enduring behavioral and neurological consequences of experimental sepsis.
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Affiliation(s)
- Mahmoud Hosseini
- Psychiatry and Behavioral Sciences Research Center, Mashhad University of Medical Sciences, Mashhad, Iran; Neuroscience Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Zahra Bardaghi
- Applied Biomedical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO, USA
| | - Hedyeh Askarpour
- Bio Environmental Health Hazards Research Center, Jiroft University of Medical Sciences, Jiroft, Iran
| | | | - Ahmad Golkar
- Student Research Committee, Jiroft University of Medical Sciences, Jiroft, Iran
| | - Shima Shirzad
- Applied Biomedical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Arezoo Rajabian
- Neuroscience Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hossein Salmani
- Bio Environmental Health Hazards Research Center, Jiroft University of Medical Sciences, Jiroft, Iran; Student Research Committee, Jiroft University of Medical Sciences, Jiroft, Iran; Department of Physiology and Pharmacology, Faculty of Medicine, Sabzevar University of Medical Sciences, Sabzevar, Iran.
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16
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Bishnoi IR, Kavaliers M, Ossenkopp KP. Lipopolysaccharide (LPS) attenuates the primary conditioning of lithium chloride (LiCl)-induced context aversion but not the secondary conditioning of context aversion or taste avoidance. Behav Brain Res 2024; 459:114800. [PMID: 38061669 DOI: 10.1016/j.bbr.2023.114800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 11/20/2023] [Accepted: 12/03/2023] [Indexed: 12/25/2023]
Abstract
A first-order association can be formed between toxin-induced nausea and a context, as well as nausea and a taste cue. However, comparatively little is understood about second-order associations. The present study examined if the bacterial endotoxin, LPS, could impair the first- and second-order conditioning of context aversion (anticipatory nausea paradigm) and subsequent conditioned taste avoidance (two-bottle task). Adult male Long Evans rats were treated with LiCl (127 mg/kg, intraperitoneal [i.p.]) or vehicle control (NaCl) and then exposed to a distinct context for 4 first-order conditioning trials. LPS (200 μg/kg, i.p.) or NaCl were administered 24 h after each trial. Seventy-two h after the final first-order conditioning trial, rats underwent 2 second-order conditioning trials where they were treated with 2% saccharin (i.p.) and then exposed to the same context. Twenty-four h after the final second-order conditioning trial, rats were tested in a two-bottle task (2 trials), where they were given a choice between water and a palatable 0.2% saccharin solution. LiCl-treated rats demonstrated a context aversion by the 3rd conditioning trial in the anticipatory nausea paradigm. Rats previously exposed to LiCl also displayed a conditioned taste avoidance of saccharin within the two-bottle task. LPS attenuated first-order context aversion but did not alter either second-order context aversion or conditioned taste avoidance in the two-bottle task. This study demonstrated that a secondary association formed within an aversive context could result in a conditioned taste avoidance. Further, LPS may be able to attenuate primary conditioning, but not secondary conditioning.
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Affiliation(s)
- Indra R Bishnoi
- Graduate Program in Neuroscience, University of Western Ontario, London, Canada; Department of Psychology, University of Western Ontario, London, Canada.
| | - Martin Kavaliers
- Graduate Program in Neuroscience, University of Western Ontario, London, Canada; Department of Psychology, University of Western Ontario, London, Canada; Department of Psychology and Neuroscience Program, University of Guelph, Guelph, Canada
| | - Klaus-Peter Ossenkopp
- Graduate Program in Neuroscience, University of Western Ontario, London, Canada; Department of Psychology, University of Western Ontario, London, Canada
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17
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Zhan F, Dong Y, Zhou L, Li X, Zhou Z, Xu G. Minocycline alleviates LPS-induced cognitive dysfunction in mice by inhibiting the NLRP3/caspase-1 pathway. Aging (Albany NY) 2024; 16:2989-3006. [PMID: 38329438 PMCID: PMC10911373 DOI: 10.18632/aging.205528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 12/06/2023] [Indexed: 02/09/2024]
Abstract
BACKGROUND Growing experimental evidence indicates that cognitive impairment is linked to neuroinflammation. Minocycline (MINO), an antibiotic known for its anti-inflammatory, has shown promise in alleviating cognitive impairment. Nonetheless, the exact mechanism through which MINO improves cognitive impairment is not yet understood. METHODS A neuroinflammatory model was establish by utilizing lipopolysaccharide. The assessment of mice's cognitive and learning abilities was conducted through the MWM and Y-maze tests. The evaluation of hippocampal neuronal injury and microglial activation were achieved by performing HE staining and IHC, respectively. To evaluate BV2 cell viability and apoptosis, the CCK-8 and Hoechst 33342/PI staining assays were employed. In order to assess the protein and RNA expression levels of NLRP3, caspase-1, IL-1β, IL-18, Iba-1, and Bcl2/Bax, WB and RT-qPCR were utilized. Additionally, the inhibitory effect of MINO on apoptosis by targeting the NLRP3/caspase-1 pathway was investigated using Nigericin. RESULTS MINO was effective in reducing the time it took for mice to escape from the test, increasing the number of platforms they crossed, and mitigating damage to the hippocampus while also suppressing microglial activation and the expression of Iba-1 in a neuroinflammatory model caused by LPS. Furthermore, MINO improved the viability of BV2 cell and reduced apoptosis. It also had the effect of reducing the expression levels of NLRP3/Caspase-1, IL-1β, IL-18, and BAX, while upregulating the expression of Bcl2. Additionally, MINO was found to downregulate the NLRP3 expression, which is specifically activated by nigericin. CONCLUSION The protective effect of MINO relies on the crucial involvement of the NLRP3/caspase-1 pathway.
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Affiliation(s)
- Fenfang Zhan
- Department of Anesthesiology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
- Jiangxi Key Laboratory of Molecular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Yao Dong
- Department of Anesthesiology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
- Jiangxi Key Laboratory of Molecular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Lanqian Zhou
- Department of Anesthesiology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
- Jiangxi Key Laboratory of Molecular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Xiaozhong Li
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, China
- Jiangxi Key Laboratory of Molecular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Zheng Zhou
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, China
- Jiangxi Key Laboratory of Molecular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Guohai Xu
- Department of Anesthesiology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
- Jiangxi Key Laboratory of Molecular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, China
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Liu DY, Wu Y, Feng ZQ, Yu Y, Cai HW, Liao SP, Zeng T, Zhu L, Wang X, Wan LH. Rosmarinic acid against cognitive impairment via RACK1/HIF-1α regulated microglial polarization in sepsis-surviving mice. Chem Biol Interact 2024; 388:110830. [PMID: 38103880 DOI: 10.1016/j.cbi.2023.110830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 11/29/2023] [Accepted: 12/08/2023] [Indexed: 12/19/2023]
Abstract
Microglial polarization modulation has been considered the potential therapeutic strategy for relieving cognitive impairment in sepsis survivors. Rosmarinic acid (RA), a water-soluble polyphenolic natural compound, processes a strong protective effect on various types of neurological disorders including Parkinson's disease, depression, and anxiety. However, its role and potential molecular mechanisms in sepsis-associated cognitive impairment remain unclear. To investigate the preventive and therapeutic effect of RA on sepsis-associated cognitive impairment and elucidate the potential mechanism of RA on regulating microglial polarization, we established a CLP-induced cognitive impairment model in mice and a lipopolysaccharide-induced microglia polarization cell model in BV-2. RACK1 siRNA was designed to identify the potential molecular mechanism of RACK1 on microglial polarization. The preventive and therapeutic effect of RA on cognitive impairment followed by PET-CT and behavioral tests including open-field test and tail suspension test. RACK1/HIF-1α pathway and microglial morphology in the hippocampus or BV-2 cells were measured. The results showed that RA significantly ameliorated the CLP-induced depressive and anxiety-like behaviors and promoted whole-brain glucose uptake in mice. Moreover, RA markedly improved CLP-induced hippocampal neuron loss and microglial activation by inhibiting microglial M1 polarization. Furthermore, experiments showed RACK1 was involved in the regulation of LPS-induced microglial M1 polarization via HIF-1α, and RA suppressed lipopolysaccharide or sepsis-associated microglial M1 polarization via RACK1/HIF-1α pathway (rescued the decrease of RACK1 and increase of HIF-1α). Taken together, RA could be a potential preventive and therapeutic medication in improving cognitive impairment through RACK1/HIF-1α pathway-regulated microglial polarization.
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Affiliation(s)
- Dan-Yang Liu
- NHC Key Laboratory of Chronobiology (Sichuan University), West China School of Basic Medical Sciences & Forensic Medicine, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China; Department of Pharmacology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Yao Wu
- NHC Key Laboratory of Chronobiology (Sichuan University), West China School of Basic Medical Sciences & Forensic Medicine, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China; Department of Pharmacology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Zi-Qi Feng
- Department of Pharmacology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, Sichuan, 610041, PR China; Top-notch Undergraduate Training Program 2.0, Grade 2019, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, 610041, PR China
| | - Yang Yu
- NHC Key Laboratory of Chronobiology (Sichuan University), West China School of Basic Medical Sciences & Forensic Medicine, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China; Department of Pharmacology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Hua-Wei Cai
- Department of Nuclear Medicine and Laboratory of Clinical Nuclear Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Shi-Ping Liao
- Functional Laboratory, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Tao Zeng
- Department of Pharmacology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Ling Zhu
- Department of Pharmacology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Xia Wang
- Department of Laboratory Medicine, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China; Key Laboratory of Birth Defects and Related Diseases of Women and Children, Sichuan University, Chengdu, Sichuan, 610041, PR China.
| | - Li-Hong Wan
- NHC Key Laboratory of Chronobiology (Sichuan University), West China School of Basic Medical Sciences & Forensic Medicine, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China; Department of Pharmacology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, Sichuan, 610041, PR China.
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19
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Lin SP, Zhu L, Shi H, Ye S, Li Q, Yin X, Xie Q, Xu Q, Wei JX, Mei F, Zhu Y, Lin PY, Chen XH. Puerarin prevents sepsis-associated encephalopathy by regulating the AKT1 pathway in microglia. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2023; 121:155119. [PMID: 37801894 DOI: 10.1016/j.phymed.2023.155119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 09/12/2023] [Accepted: 09/24/2023] [Indexed: 10/08/2023]
Abstract
BACKGROUND Previous studies have reported that puerarin possesses cardioprotective, vasodilatory, anti-inflammatory, anti-apoptotic, and hypoglycemic properties. However, the impact of puerarin on sepsis-associated encephalopathy (SAE) remains unexplored. In this study, we explored whether puerarin can modulate microglia-mediated neuroinflammation for the treatment of SAE and delved into the underlying mechanisms. METHODS We established a murine model of SAE through intraperitoneal injection of lipopolysaccharide (LPS). The puerarin treatment group received pretreatment with puerarin. For in vitro experiments, BV2 cells were pre-incubated with puerarin for 2 h before LPS exposure. We employed network pharmacology, the Morris Water Maze (MWM) test, Novel Object Recognition (NOR) test, immunofluorescence staining, enzyme-linked immunosorbent assay (ELISA), Western blotting, and quantitative real-time PCR (qRT-PCR) to elucidate the molecular mechanism of underlying puerarin's effects in SAE treatment. RESULTS Our findings demonstrate that puerarin significantly reduced the production of inflammatory cytokines (TNF-α and IL-6) in the peripheral blood of LPS-treated mice. Moreover, puerarin treatment markedly ameliorated sepsis-associated cognitive impairment. Puerarin also exhibited inhibitory effects on the release of TNF-α and IL-6 from microglia, thereby preventing hippocampal neuronal cell death. Network pharmacology analysis identified AKT1 as a potential therapeutic target for puerarin in SAE treatment. Subsequently, we validated these results in both in vitro and in vitro experiments. Our study conclusively demonstrated that puerarin reduced LPS-induced phosphorylation of AKT1, with the AKT activator SC79 reversing puerarin's anti-inflammatory effects through the activation of the AKT1 signaling pathway. CONCLUSION Puerarin exerts an anti-neuroinflammatory effect against SAE by modulating the AKT1 pathway in microglia.
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Affiliation(s)
- Shao-Peng Lin
- Department of Emergency, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, PR China
| | - Lidong Zhu
- Department of Emergency, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, PR China
| | - Hongjian Shi
- Department of Emergency, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, PR China
| | - Shan Ye
- Department of Geriatrics, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, PR China
| | - Qi Li
- Department of Emergency, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, PR China
| | - Xiaofang Yin
- Department of Emergency, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, PR China
| | - Qiangda Xie
- Department of Emergency, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, PR China
| | - Qizhong Xu
- Department of Emergency, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, PR China
| | - Jue-Xian Wei
- Department of Emergency, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, PR China
| | - Fen Mei
- Department of Emergency, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, PR China
| | - Yongcheng Zhu
- Department of Emergency, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, PR China
| | - Pei-Yi Lin
- Department of Emergency, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, PR China
| | - Xiao-Hui Chen
- Department of Emergency, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, PR China.
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Matias ME, Radulski DR, Rodrigues da Silva T, Raymundi AM, Stern CAJ, Zampronio AR. Involvement of cannabinoid receptors and neuroinflammation in early sepsis: Implications for posttraumatic stress disorder. Int Immunopharmacol 2023; 123:110745. [PMID: 37541107 DOI: 10.1016/j.intimp.2023.110745] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 07/20/2023] [Accepted: 07/29/2023] [Indexed: 08/06/2023]
Abstract
Sepsis is associated with several comorbidities in survivors, such as posttraumatic stress disorder (PTSD). This study investigated whether rats that survive sepsis develop the generalization of fear memory as a model of PTSD. Responses to interventions that target the endothelin-1 (ET-1)/cannabinoid system and glial activation in the initial stages of sepsis were evaluated. As a control, we evaluated hyperalgesia before fear conditioning. Sepsis was induced by cecal ligation and puncture (CLP) in Wistar rats. CLP-induced sepsis with one or three punctures resulted in fear generalization in the survivors 13 and 20 days after the CLP procedure, a process that was not associated with hyperalgesia. Septic animals were intracerebroventricularly treated with vehicle, the endothelin receptor A (ETA) antagonist BQ123, the cannabinoid CB1 and CB2 receptor antagonists AM251 and AM630, respectively, and the glial blocker minocycline 4 h after CLP. The blockade of either CB1 or ETA receptors increased the survival rate, but only the former reversed fear memory generalization. The endothelinergic system blockade is important for improving survival but not for fear memory. Treatment with the CB2 receptor antagonist or minocycline also reversed the generalization of fear memory but did not increase the survival rate that was associated with CLP. Minocycline treatment also reduced tumor necrosis factor-α levels in the hippocampus suggesting that neuroinflammation is important for the generalization of fear memory induced by CLP. The influence of CLP on the generalization of fear memory was not related to Arc protein expression, a regulator of synaptic plasticity, in the dorsal hippocampus.
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Affiliation(s)
| | | | | | - Ana Maria Raymundi
- Department of Pharmacology, Federal University of Paraná, Curitiba, PR, Brazil
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21
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Liao Z, Zhu Q, Huang H. Involvement of IL-1β-Mediated Necroptosis in Neurodevelopment Impairment after Neonatal Sepsis in Rats. Int J Mol Sci 2023; 24:14693. [PMID: 37834141 PMCID: PMC10572485 DOI: 10.3390/ijms241914693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 09/21/2023] [Accepted: 09/26/2023] [Indexed: 10/15/2023] Open
Abstract
The mechanism of long-term cognitive impairment after neonatal sepsis remains poorly understood, although long-lasting neuroinflammation has been considered the primary contributor. Necroptosis is actively involved in the inflammatory process, and in this study, we aimed to determine whether neonatal sepsis-induced long-term cognitive impairment was associated with activation of necroptosis. Rat pups on postnatal day 3 (P3) received intraperitoneal injections of lipopolysaccharide (LPS, 1 mg/kg) to induce neonatal sepsis. Intracerebroventricular injection of IL-1β-siRNA and necrostatin-1 (NEC1) were performed to block the production of IL-1β and activation of necroptosis in the brain, respectively. The Morris water maze task and fear conditioning test were performed on P28-P32 and P34-P35, respectively. Enzyme-linked immunosorbent assay (ELISA), quantitative real-time PCR (RT-PCR), and Western blotting were used to examine the expression levels of proinflammatory cytokines and necroptosis-associated proteins, such as receptor-interacting protein 1 (RIP1) and receptor-interacting protein 3 (RIP3). Sustained elevation of IL-1β level was observed in the brain after initial neonatal sepsis, which would last for at least 32 days. Sustained necroptosis activation was also observed in the brain. Knockdown of IL-1β expression in the brain alleviated necroptosis and improved long-term cognitive function. Direct inhibition of necroptosis also improved neurodevelopment and cognitive performance. This research indicated that sustained activation of necroptosis via IL-1β contributed to long-term cognitive dysfunction after neonatal sepsis.
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Affiliation(s)
| | | | - Han Huang
- Department of Anesthesiology and Key Laboratory of Birth Defects and Related Diseases of Women and Children, West China Second University Hospital of Sichuan University, Chengdu 610041, China; (Z.L.); (Q.Z.)
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22
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Pramitasuri TI, Susilawathi NM, Tarini NMA, Sudewi AAR, Evans MC. Cholesterol dependent cytolysins and the brain: Revealing a potential therapeutic avenue for bacterial meningitis. AIMS Microbiol 2023; 9:647-667. [PMID: 38173970 PMCID: PMC10758573 DOI: 10.3934/microbiol.2023033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 07/24/2023] [Accepted: 08/14/2023] [Indexed: 01/05/2024] Open
Abstract
Bacterial meningitis is a catastrophic nervous system disorder with high mortality and wide range of morbidities. Some of the meningitis-causing bacteria occupy cholesterol dependent cytolysins (CDCs) to increase their pathogenicity and arrange immune-evasion strategy. Studies have observed that the relationship between CDCs and pathogenicity in these meningitides is complex and involves interactions between CDC, blood-brain barrier (BBB), glial cells and neurons. In BBB, these CDCs acts on capillary endothelium, tight junction (TJ) proteins and neurovascular unit (NVU). CDCs also observed to elicit intriguing effects on brain inflammation which involves microglia and astrocyte activations, along with neuronal damage as the end-point of pathological pathways in bacterial meningitis. As some studies mentioned potential advantage of CDC-targeted therapeutic mechanisms to combat CNS infections, it might be a fruitful avenue to deepen our understanding of CDC as a candidate for adjuvant therapy to combat bacterial meningitis.
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Affiliation(s)
- Tjokorda Istri Pramitasuri
- Doctoral Program in Medical Science, Faculty of Medicine, Universitas Udayana, Bali, Indonesia
- Postgraduate Research Student, Faculty of Medicine, Imperial College London, United Kingdom
| | - Ni Made Susilawathi
- Department of Neurology, Faculty of Medicine, Universitas Udayana, Bali, Indonesia
| | - Ni Made Adi Tarini
- Department of Microbiology, Faculty of Medicine, Universitas Udayana-Rumah Sakit Umum Pusat Prof Dr dr IGNG Ngoerah, Bali, Indonesia
| | - AA Raka Sudewi
- Department of Neurology, Faculty of Medicine, Universitas Udayana, Bali, Indonesia
| | - Matthew C Evans
- Pain Research, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, United Kingdom
- Department of Brain Sciences, Care Research and Technology Centre, UK Dementia Research Institute, London, United Kingdom
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Wang Y, Zhu Y, Tian M, Wang Y, Pei X, Jiang J, He Y, Gong Y. Recent advances in the study of sepsis-induced depression. JOURNAL OF INTENSIVE MEDICINE 2023; 3:239-243. [PMID: 37533814 PMCID: PMC10391568 DOI: 10.1016/j.jointm.2022.12.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 12/19/2022] [Accepted: 12/28/2022] [Indexed: 08/04/2023]
Abstract
Progress in medicine such as the use of anti-infective drugs and development of the advanced life support equipment has greatly improved the survival rate of patients with sepsis. However, the incidence of sepsis-related diseases is increasing. These include severe neurologic and psychologic disorders, cognitive decline, anxiety, depression, and post-traumatic stress disorder. Cerebral dysfunction occurs via multiple interacting mechanisms, with different causative pathogens having distinct effects. Because sepsis-related diseases place a substantial burden on patients and their families, it is important to elucidate the underlying pathophysiologic mechanisms to develop effective treatments.
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Ji MH, Gao YZ, Shi CN, Wu XM, Yang JJ. Acute and long-term cognitive impairment following sepsis: mechanism and prevention. Expert Rev Neurother 2023; 23:931-943. [PMID: 37615511 DOI: 10.1080/14737175.2023.2250917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Accepted: 08/18/2023] [Indexed: 08/25/2023]
Abstract
INTRODUCTION Sepsis is a severe host response to infection, which induces both acute and long-term cognitive impairment. Despite its high incidence following sepsis, the underlying mechanisms remain elusive and effective treatments are not available clinically. AREA COVERED This review focuses on elucidating the pathological mechanisms underlying cognitive impairment following sepsis. Specifically, the authors discuss the role of systemic inflammation response, blood-brain barrier disruption, neuroinflammation, mitochondrial dysfunction, neuronal dysfunction, and Aβ accumulation and tau phosphorylation in cognitive impairment after sepsis. Additionally, they review current strategies to ameliorate cognitive impairment. EXPERT OPINION Potential interventions to reduce cognitive impairment after sepsis include earlier diagnosis and effective infection control, hemodynamic homeostasis, and adequate brain perfusion. Furthermore, interventions to reduce inflammatory response, reactive oxygen species, blood-brain barrier disruption, mitochondrial dysfunction, neuronal injury or death could be beneficial. Implementing strategies to minimize delirium, sleep disturbance, stress factors, and immobility are also recommended. Furthermore, avoiding neurotoxins and implementing early rehabilitation may also be important for preventing cognitive impairment after sepsis.
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Affiliation(s)
- Mu-Huo Ji
- Department of Anesthesiology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yu-Zhu Gao
- Department of Anesthesiology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Cui-Na Shi
- Department of Anesthesiology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Xin-Miao Wu
- Department of Anesthesiology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Jian-Jun Yang
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
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Moriyama N, Saito M, Ono Y, Yamashita K, Aoi T, Kotani J. Increased Interleukin-17-Producing γδT Cells in the Brain Exacerbate the Pathogenesis of Sepsis-Associated Encephalopathy and Sepsis-Induced Anxiety in Mice. J Clin Med 2023; 12:4309. [PMID: 37445343 DOI: 10.3390/jcm12134309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Revised: 06/06/2023] [Accepted: 06/13/2023] [Indexed: 07/15/2023] Open
Abstract
Overactivated microglia play a key role in sepsis-associated encephalopathy (SAE), although the involvement of T cells is unclear. γδT cells in the brain and meninges regulate normal fear responses via interleukin (IL)-17 in healthy mice. In our sepsis model, the mice showed exacerbated anxious behavior at 10 days post-induction (dpi). At 8 dpi, IL-17 mRNA was significantly upregulated in the brains of septic mice compared with those of control mice. Simultaneously, the number of γδT cells increased in the brains of septic mice in a severity-dependent manner. Additionally, IL-17-producing γδT cells, expressing both the C-X-C motif receptor (CXCR) 6 and the C-C motif receptor (CCR) 6, increased in mice brains, dependent on the severity of sepsis. The frequency of γδT cells in the meninges fluctuated similarly to that in the brain, peaking at 8 dpi of sepsis. Behavioral tests were performed on septic mice after the continuous administration of anti-γδTCR (α-γδTCR) or anti-IL-17A (α-IL-17A) antibodies to deplete the γδT cells and IL-17A, respectively. Compared with IgG-treated septic mice, α-γδTCR- and α-IL-17A-treated septic mice showed suppressed microglial activation and improvements in anxious behavior. These results suggested that CCR6+CXCR6+ IL-17-producing γδT cells in the brain and meninges promote the exacerbation of SAE and sepsis-induced psychological disorders in mice.
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Affiliation(s)
- Naoki Moriyama
- Department of Disaster and Emergency and Critical Care Medicine, Kobe University Graduate School of Medicine, Kusunoki-cho 7-5-2, Chuo-ward, Kobe 650-0017, Japan
| | - Masafumi Saito
- Department of Disaster and Emergency and Critical Care Medicine, Kobe University Graduate School of Medicine, Kusunoki-cho 7-5-2, Chuo-ward, Kobe 650-0017, Japan
| | - Yuko Ono
- Department of Disaster and Emergency and Critical Care Medicine, Kobe University Graduate School of Medicine, Kusunoki-cho 7-5-2, Chuo-ward, Kobe 650-0017, Japan
| | - Kimihiro Yamashita
- Department of Surgery, Division of Gastrointestinal Surgery, Kobe University Graduate School of Medicine, Kusunoki-cho 7-5-2, Chuo-ward, Kobe 650-0017, Japan
| | - Takashi Aoi
- Division of Stem Cell Medicine, Kobe University Graduate School of Medicine, Kusunoki-cho 7-5-2, Chuo-ward, Kobe 650-0017, Japan
- Division of Advanced Medical Science, Kobe University Graduate School of Science, Technology and Innovation, Kusunoki-cho 7-5-2, Chuo-ward, Kobe 650-0017, Japan
- Center for Human Resource Development for Regenerative Medicine, Kobe University Hospital, Kusunoki-cho 7-5-2, Chuo-ward, Kobe 650-0017, Japan
| | - Joji Kotani
- Department of Disaster and Emergency and Critical Care Medicine, Kobe University Graduate School of Medicine, Kusunoki-cho 7-5-2, Chuo-ward, Kobe 650-0017, Japan
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Miyao M, Hirotsu A, Tatsumi K, Tanaka T. Prior exposure to stress exacerbates neuroinflammation and causes long-term behavior changes in sepsis. Heliyon 2023; 9:e16904. [PMID: 37484359 PMCID: PMC10360945 DOI: 10.1016/j.heliyon.2023.e16904] [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: 02/28/2022] [Revised: 04/23/2023] [Accepted: 05/31/2023] [Indexed: 07/25/2023] Open
Abstract
Background Neuroinflammation can occur during sepsis and is now regarded as the main mechanism underlying various related central nervous system (CNS) disorders. Another well-known factor causing neuroinflammation is psychological stress. In the current study, we examined the effects of prior exposure to stress on sepsis-induced neuroinflammation and CNS symptoms. Experimental procedure Balb/c mice were subjected to wet bedding stress for 2 days, then lipopolysaccharide (LPS) was intraperitoneally administered. For examining the neuroinflammation, the expression of proinflammatory cytokines and NF-κB activity in the brain was analyzed by RT-PCR and ELISA-based assay. Additionally, immunohistochemical study using Iba-1 was performed. Finally, behavior tests were examined one month after LPS treatment. Result and conclusion Stress exposure induced the upregulation of IL-1β, IL-6 and TNFα mRNA in the cerebral cortex 4 h after LPS administration. Suggesting an underlying mechanism, LPS-induced NF-κB activation was significantly upregulated with stress in the brain. Histologically, microglia in the cerebral cortex were reactive and became more abundant with stress, while these effects were further increased with LPS injection. Behavioral analysis conducted showed a significant increase of anxiety-like behaviors in the stressed mice. These results suggest that prior exposure to stress exacerbates neuroinflammation during sepsis and induces long-term behavior changes.
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Affiliation(s)
- Mariko Miyao
- Department of Anesthesia, Kyoto University Hospital, 54 Kawahara-Cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - Akiko Hirotsu
- Department of Anesthesia, Kyoto University Hospital, 54 Kawahara-Cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - Kenichiro Tatsumi
- Department of Anesthesia, Kyoto University Hospital, 54 Kawahara-Cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - Tomoharu Tanaka
- Department of Anesthesia, Hyogo Prefectural Amagasaki General Medical Center, 2-17-77 Higashi Naniwacho, Amagasaki, Hyogo 660-8550, Japan
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Jiang F, Guo Y, Hu L, Zhang M, Meng J, Si Y, Shi H. Role of nuclear factor of activated T Cells-1 in Sepsis-induced behavioral deficits in mice. Brain Res 2023; 1806:148299. [PMID: 36842570 DOI: 10.1016/j.brainres.2023.148299] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 02/13/2023] [Accepted: 02/20/2023] [Indexed: 02/28/2023]
Abstract
INTRODUCTION The nuclear factor of activated T cells-1 (NFAT1) is involved in both neuroinflammation and cognitive dysfunction. In this study, we examined the role of NFAT1 in sepsis-induced cognitive impairment in a mouse model. METHODS Sepsis was established in adult mice by cecal ligation and puncture (CLP). Novel object recognition tests on days 14-21 and fear conditioning tests on days 22-23 post-surgery showed that CLP impaired both behaviors. BV2 microglia cells exposed to lipopolysaccharide (LPS) were used to examine the effects of short interfering RNA targeting NFAT1 on autophagy and inflammatory cytokines. RESULTS CLP increased the expression of NFAT1 in hippocampal microglia and induced hippocampal autophagy by downregulating p62, upregulating beclin-1 and autophagy-related gene-5, and increasing the ratio of microtubule-associated protein 1 light chain 3-I (LC3-I) to LC3-II. In addition, CLP shifted microglial polarization from M2 to M1 and the production of inflammatory cytokines, similar to the effects of lipopolysaccharide on BV2 microglia cells. Conversely, NFAT1 knockdown or the autophagy inhibitor 3-methyladenine attenuated the effects of CLP on autophagy and inflammation in vitro and in vivo, while rapamycin partially reversed the protective effects of NFAT1 inhibition. CONCLUSION This study suggests that NFAT1 downregulation attenuates sepsis-induced behavioral deficits by inhibiting autophagy, microglia polarization, and neuroinflammation..
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Affiliation(s)
- Fan Jiang
- Department of Anesthesiology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, Jiangsu, China
| | - Yaoyi Guo
- Department of Anesthesiology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, Jiangsu, China
| | - Liang Hu
- Department of Pharmacology, Nanjing Medical University, Nanjing 211166, Jiangsu, China
| | - Mengxue Zhang
- Department of Pathology, Nanjing Medical University, Nanjing 211166, Jiangsu, China
| | - Jieqiong Meng
- Department of Anesthesiology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, Jiangsu, China
| | - Yanna Si
- Department of Anesthesiology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, Jiangsu, China.
| | - Hongwei Shi
- Department of Anesthesiology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, Jiangsu, China.
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D’Amico R, Tomasello M, Impellizzeri D, Cordaro M, Siracusa R, Interdonato L, Abdelhameed AS, Fusco R, Calabrese V, Cuzzocrea S, Di Paola R. Mechanism of Action of Natural Compounds in Peripheral Multiorgan Dysfunction and Hippocampal Neuroinflammation Induced by Sepsis. Antioxidants (Basel) 2023; 12:antiox12030635. [PMID: 36978883 PMCID: PMC10045853 DOI: 10.3390/antiox12030635] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 02/28/2023] [Accepted: 03/01/2023] [Indexed: 03/08/2023] Open
Abstract
Bacterial sepsis induces the production of excessive pro-inflammatory cytokines and oxidative stress, resulting in tissue injury and hyperinflammation. Patients recovering from sepsis have increased rates of central nervous system (CNS) morbidities, which are linked to long-term cognitive impairment, such as neurodegenerative pathologies. This paper focuses on the tissue injury and hyperinflammation observed in the acute phase of sepsis and on the development of long-term neuroinflammation associated with septicemia. Here we evaluate the effects of Coriolus versicolor administration as a novel approach to treat polymicrobial sepsis. Rats underwent cecal ligation and perforation (CLP), and Coriolus versicolor (200 mg/kg in saline) was administered daily by gavage. Survival was monitored, and tissues from vital organs that easily succumb to infection were harvested after 72 h to evaluate the histological changes. Twenty-eight days after CLP, behavioral analyses were performed, and serum and brain (hippocampus) samples were harvested at four weeks from surgery. Coriolus versicolor increased survival and reduced acute tissue injury. Indeed, it reduced the release of pro-inflammatory cytokines in the bloodstream, leading to a reduced chronic inflammation. In the hippocampus, Coriolus versicolor administration restored tight junction expressions, reduce cytokines accumulation and glia activation. It also reduced toll-like receptor 4 (TLR4) and neuronal nitric oxide synthase (nNOS) and the NLR family pyrin domain containing 3 (NLRP3) inflammasome components expression. Coriolus versicolor showed antioxidant activities, restoring glutathione (GSH) levels and catalase and superoxide dismutase (SOD) activities and reducing lipid peroxidation, nitrite and reactive oxygen species (ROS) levels. Importantly, Coriolus versicolor reduced amyloid precursor protein (APP), phosphorylated-Tau (p-Tau), pathologically phosphorylated tau (PHF1), phosphorylated tau (Ser202 and Thr205) (AT8), interferon-induced transmembrane protein 3 (IFITM3) expression, and β-amyloid accumulation induced by CLP. Indeed, Coriolus versicolor restored synaptic dysfunction and behavioral alterations. This research shows the effects of Coriolus versicolor administration on the long-term development of neuroinflammation and brain dysfunction induced by sepsis. Overall, our results demonstrated that Coriolus versicolor administration was able to counteract the degenerative process triggered by sepsis.
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Affiliation(s)
- Ramona D’Amico
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D’Alcontres, n 31, 98166 Messina, Italy
| | - Mario Tomasello
- Department of Biomedical and Biotechnological Sciences, University of Catania, 95124 Catania, Italy
| | - Daniela Impellizzeri
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D’Alcontres, n 31, 98166 Messina, Italy
| | - Marika Cordaro
- Department of Biomedical, Dental and Morphological and Functional Imaging, University of Messina, Via Consolare Valeria, 98125 Messina, Italy
| | - Rosalba Siracusa
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D’Alcontres, n 31, 98166 Messina, Italy
| | - Livia Interdonato
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D’Alcontres, n 31, 98166 Messina, Italy
| | - Ali Saber Abdelhameed
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 14451, Saudi Arabia
| | - Roberta Fusco
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D’Alcontres, n 31, 98166 Messina, Italy
- Correspondence:
| | - Vittorio Calabrese
- Department of Biomedical and Biotechnological Sciences, University of Catania, 95124 Catania, Italy
| | - Salvatore Cuzzocrea
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D’Alcontres, n 31, 98166 Messina, Italy
| | - Rosanna Di Paola
- Department of Vererinary Sciences, University of Messina, Viale Annunziata, 98168 Messina, Italy
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Ferlini L, Gaspard N. What's new on septic encephalopathy? Ten things you need to know. Minerva Anestesiol 2023; 89:217-225. [PMID: 35833857 DOI: 10.23736/s0375-9393.22.16689-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Sepsis associated encephalopathy (SAE) is a frequent complication of sepsis and is associated with a higher risk of short-term mortality and long-term cognitive impairment. The EEG is a sensitive complement of the clinical examination that can also detect and quantify encephalopathy and identify features with prognostic value, such as lack of reactivity. Moreover, despite their effect on outcome is still debated, the EEG is the only tool to detect non-convulsive seizures which can occur in a septic setting. Understanding the pathophysiology of SAE is fundamental to define potential therapeutic targets. Neuroinflammation plays an important role in the development of SAE and many blood and imaging biomarkers have recently shown a promising ability to distinguish SAE form non-SAE patient. In recent years, some interesting mediators of inflammation were successfully targeted in animal models, with a significant reduction in the neuroinflammation and in sepsis-induced cognitive decline. However, the complexity of the host response to sepsis currently limits the use of immunomodulation therapies in humans. Alteration in regulatory systems of cerebral blood flow, namely cerebral autoregulation (CA) and neurovascular coupling, contribute to SAE development. Nowadays, clinicians have access to different tools to assess them at the bedside and CA-based blood pressure protocols should be implemented to optimize cerebral perfusion. Its inauspicious consequences, its complex physiopathology and the lack of efficacious treatment make of SAE a highly active research subject.
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Affiliation(s)
- Lorenzo Ferlini
- Department of Neurology, Hôpital Erasme, University of Brussels, Brussels, Belgium
| | - Nicolas Gaspard
- Department of Neurology, Hôpital Erasme, University of Brussels, Brussels, Belgium -
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Bishnoi IR, Kavaliers M, Ossenkopp KP. Immune activation attenuates memory acquisition and consolidation of conditioned disgust (anticipatory nausea) in rats. Behav Brain Res 2023; 439:114250. [PMID: 36503043 DOI: 10.1016/j.bbr.2022.114250] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 11/25/2022] [Accepted: 12/06/2022] [Indexed: 12/13/2022]
Abstract
Anticipatory nausea is a classically conditioned response to cues (e.g. contexts) that have been previously paired with a nauseating stimulus, such as chemotherapy in humans. In rodents, anticipatory nausea can be modeled by pairing a novel context with lithium chloride (LiCl), which leads to conditioned disgust behaviours (such as gaping) when exposed to the context alone. Growing evidence suggests that selective immune activation attenuates various forms of learning and memory. The present study investigated the effects of the endotoxin lipopolysaccharide (LPS) on LiCl-induced anticipatory nausea across critical stages of associative memory including acquisition, consolidation, and extinction. Adult male Long Evans rats were subject to intraperitoneal (i.p.) LiCl (127 mg/kg) or vehicle control (NaCl) paired with a 30 min conditioning trial in a distinct context for a total of 4 trials. To study acquisition, rats were administered either LPS or NaCl (200 μg/kg, i.p.) 90 mins before the conditioning trials. To study consolidation, different rats were administered either LPS or NaCl (200 μg/kg, i.p.) immediately after the conditioning trials. These trials were followed by 4 drug-free extinction trials within the same context. LPS significantly reduced conditioned gaping behaviours by the 4th conditioning trial and on the 1st drug-free extinction trial when administered 90 mins before or immediately after the conditioning trials. LPS had no significant effect on extinction. The present study provides strong evidence for the attenuating effects of LPS exposure on the acquisition and consolidation of LiCl-induced anticipatory nausea.
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Affiliation(s)
- Indra R Bishnoi
- Graduate Program in Neuroscience, University of Western Ontario, London, Canada; Department of Psychology, University of Western Ontario, London, Canada.
| | - Martin Kavaliers
- Graduate Program in Neuroscience, University of Western Ontario, London, Canada; Department of Psychology, University of Western Ontario, London, Canada; Department of Psychology and Neuroscience Program, University of Guelph, Guelph, Canada
| | - Klaus-Peter Ossenkopp
- Graduate Program in Neuroscience, University of Western Ontario, London, Canada; Department of Psychology, University of Western Ontario, London, Canada
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Hughes FM, Odom MR, Cervantes A, Livingston AJ, Purves JT. Why Are Some People with Lower Urinary Tract Symptoms (LUTS) Depressed? New Evidence That Peripheral Inflammation in the Bladder Causes Central Inflammation and Mood Disorders. Int J Mol Sci 2023; 24:2821. [PMID: 36769140 PMCID: PMC9917564 DOI: 10.3390/ijms24032821] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 01/27/2023] [Accepted: 01/29/2023] [Indexed: 02/05/2023] Open
Abstract
Anecdotal evidence has long suggested that patients with lower urinary tract symptoms (LUTS) develop mood disorders, such as depression and anxiety, at a higher rate than the general population and recent prospective studies have confirmed this link. Breakthroughs in our understanding of the diseases underlying LUTS have shown that many have a substantial inflammatory component and great strides have been made recently in our understanding of how this inflammation is triggered. Meanwhile, studies on mood disorders have found that many are associated with central neuroinflammation, most notably in the hippocampus. Excitingly, work on other diseases characterized by peripheral inflammation has shown that they can trigger central neuroinflammation and mood disorders. In this review, we discuss the current evidence tying LUTS to mood disorders, its possible bidirectionally, and inflammation as a common mechanism. We also review modern theories of inflammation and depression. Finally, we discuss exciting new animal studies that directly tie two bladder conditions characterized by extensive bladder inflammation (cyclophosphamide-induced hemorrhagic cystitis and bladder outlet obstruction) to neuroinflammation and depression. We conclude with a discussion of possible mechanisms by which peripheral inflammation is translated into central neuroinflammation with the resulting psychiatric concerns.
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Affiliation(s)
- Francis M. Hughes
- Department Urology, Duke University Medical Center, P.O. Box 3831, Durham, NC 27710, USA
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Consecutive Injection of High-Dose Lipopolysaccharide Modulates Microglia Polarization via TREM2 to Alter Status of Septic Mice. Brain Sci 2023; 13:brainsci13010126. [PMID: 36672106 PMCID: PMC9856382 DOI: 10.3390/brainsci13010126] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 12/29/2022] [Accepted: 01/09/2023] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND The neuroinflammation of the central nervous system (CNS) is a prevalent syndrome of brain dysfunction secondary to severe sepsis and is regulated by microglia. Triggering the receptor expressed on myeloid cells 2 (TREM2) is known to have protective functions that modulate the microglial polarization of M2 type to reduce inflammatory responses, thereby improving cognition. METHODS We examined the effect of TREM2 on the polarization state of microglia during the progression of neuroinflammation. After consecutive intraperitoneal injections of lipopolysaccharide for 7 days, we evaluated the inflammation of a septic mice model by hematoxylin-eosin (H&E) and electron microscopy, and we used immunofluorescence (IF) assays and Western blotting to visualize hippocampal sections in C57BL/6 mice to assess TREM2 expression. In addition, we analyzed the state of microglia polarization with quantitative RT-PCR. RESULT The consecutive injection of LPS for 4 days elevated systemic inflammation and caused behavioral cognitive dysfunction in the septic model. However, on Day 7, the neuroinflammation was considerably attenuated. Meanwhile, TREM2 decreased on Day 4 and increased on Day 7 in vivo. Consistently, LPS could reduce the expression of TREM2 while IFN-β enhanced TREM2 expression in vitro. TREM2 regulated the microglial M1 phenotype's conversion to the M2 phenotype. CONCLUSION Our aim in this study was to investigate the interconnection between microglia polarization and TREM2 in neuroinflammation. Our results suggested that IFN-β could modulate TREM2 expression to alter the polarization state of microglia, thereby reducing LPS-induced neuroinflammation. Therefore, TREM2 is a novel potential therapeutic target for neuroinflammation.
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Tian Y, Wang L, Fan X, Zhang H, Dong Z, Tao T. β-patchoulene alleviates cognitive dysfunction in a mouse model of sepsis associated encephalopathy by inhibition of microglia activation through Sirt1/Nrf2 signaling pathway. PLoS One 2023; 18:e0279964. [PMID: 36608000 PMCID: PMC9821490 DOI: 10.1371/journal.pone.0279964] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 12/19/2022] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Sepsis associated encephalopathy (SAE) is a common but poorly understood complication during sepsis. Currently, there are no preventive or therapeutic agents available for this neurological disorder. The present study was designed to determine the potential protective effects of β-patchoulene (β-PAE) in a mouse model of SAE and explore the putative mechanisms underpinning the beneficial effects. MATERIALS AND METHODS SAE was induced in C57BL/6 mice by cecal ligation and puncture(CLP). Mice were administrated with β-PAE or saline by intra-cerebral ventricle(i.c.v) injection immediately after CLP surgery. The inhibitory avoidance tests and open field tests were performed at 24h, 48h and 7days after procedures. Cytokines expression, oxidative parameters, microglia polarization and apoptosis in the brain tissue were assessed. Sirt1, Nrf2, HO-1and cleaved-caspase3 expression in hippocampus was determined by western-blotting. Further, serum cytokines expression and spleen lymphocytes apoptosis were evaluated, and survival study was performed. RESULTS Septic mice suffered severe cognitive decline following CLP as evidenced by decreased memory latency time and lower frequency of line crossing in the behavioral tests. A high dose of β-PAE(1mg/kg) improved the cognitive impairment in SAE mice, which was accompanied by reduced cytokines expression and oxidative stress. Immunofluorescence assay showed that β-PAE inhibited the expression of Iba-1 and iNOS in microglia. The mechanistic study indicated that β-PAE could promote the nuclear expression of Sirt1/Nrf2 and enhance cytoplasmic HO-1 expression. Furthermore, i.c.v administration of β-PAE decreased the expression of serum cytokines and apoptosis in the spleen, thus leading to an improved 7-day survival of septic mice. Finally, blockade of Nrf2 activation with ML385 largely mitigated the protective effects of β-PAE on the cognitive function, neuroinflammation and survival in SAE mice. CONCLUSION In this study, we found that β-PAE significantly altered sepsis induced neuroinflammation and microglia activation, thus reversed the cognitive decline and improved the peripheral immune function. The neuroprotective effects were possibly mediated by the activation of Sirt1/Nrf2/HO-1 pathway. β-PAE might serve as a promising therapeutic agent for SAE prevention and treatment.
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Affiliation(s)
- Ye Tian
- Department of Anesthesiology, Sixth Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Lin Wang
- Department of General Surgery, Air Force Medical Center, Beijing, China
| | - Xiaojing Fan
- Department of Anesthesiology, Air Force Medical Center, Beijing, China
| | - Hui Zhang
- Department of Neurosurgery, Air Force Medical Center, Beijing, China
| | - Zhiwei Dong
- Department of General Surgery, Air Force Medical Center, Beijing, China
- * E-mail: (TT); (DZ)
| | - Tianzhu Tao
- Department of Anesthesiology, Air Force Medical Center, Beijing, China
- * E-mail: (TT); (DZ)
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Alves VS, da Silva JP, Rodrigues FC, Araújo SMB, Gouvêa AL, Leite-Aguiar R, Santos SACS, da Silva MSP, Ferreira FS, Marques EP, dos Passos BABR, Maron-Gutierrez T, Kurtenbach E, da Costa R, Figueiredo CP, Wyse ATS, Coutinho-Silva R, Savio LEB. P2X7 receptor contributes to long-term neuroinflammation and cognitive impairment in sepsis-surviving mice. Front Pharmacol 2023; 14:1179723. [PMID: 37153798 PMCID: PMC10160626 DOI: 10.3389/fphar.2023.1179723] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Accepted: 04/12/2023] [Indexed: 05/10/2023] Open
Abstract
Introduction: Sepsis is defined as a multifactorial debilitating condition with high risks of death. The intense inflammatory response causes deleterious effects on the brain, a condition called sepsis-associated encephalopathy. Neuroinflammation or pathogen recognition are able to stress cells, resulting in ATP (Adenosine Triphosphate) release and P2X7 receptor activation, which is abundantly expressed in the brain. The P2X7 receptor contributes to chronic neurodegenerative and neuroinflammatory diseases; however, its function in long-term neurological impairment caused by sepsis remains unclear. Therefore, we sought to evaluate the effects of P2X7 receptor activation in neuroinflammatory and behavioral changes in sepsis-surviving mice. Methods: Sepsis was induced in wild-type (WT), P2X7-/-, and BBG (Brilliant Blue G)-treated mice by cecal ligation and perforation (CLP). On the thirteenth day after the surgery, the cognitive function of mice was assessed using the novel recognition object and Water T-maze tests. Acetylcholinesterase (AChE) activity, microglial and astrocytic activation markers, and cytokine production were also evaluated. Results: Initially, we observed that both WT and P2X7-/- sepsis-surviving mice showed memory impairment 13 days after surgery, once they did not differentiate between novel and familiar objects. Both groups of animals presented increased AChE activity in the hippocampus and cerebral cortex. However, the absence of P2X7 prevented partly this increase in the cerebral cortex. Likewise, P2X7 absence decreased ionized calcium-binding protein 1 (Iba-1) and glial fibrillary acidic protein (GFAP) upregulation in the cerebral cortex of sepsis-surviving animals. There was an increase in GFAP protein levels in the cerebral cortex but not in the hippocampus of both WT and P2X7-/- sepsis-surviving animals. Pharmacological inhibition or genetic deletion of P2X7 receptor attenuated the production of Interleukin-1β (IL-1β), Tumor necrosis factor-α (TNF-α), and Interleukin-10 (IL-10). Conclusion: The modulation of the P2X7 receptor in sepsis-surviving animals may reduce neuroinflammation and prevent cognitive impairment due to sepsis-associated encephalopathy, being considered an important therapeutic target.
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Affiliation(s)
- Vinícius Santos Alves
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Joyce Pereira da Silva
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Fabiana Cristina Rodrigues
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - André Luiz Gouvêa
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Raíssa Leite-Aguiar
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | | | | | - Fernanda Silva Ferreira
- Laboratório de Neuroproteção e Doenças Metabólicas, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde (ICBS), Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Eduardo Peil Marques
- Laboratório de Neuroproteção e Doenças Metabólicas, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde (ICBS), Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | | | | | - Eleonora Kurtenbach
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Robson da Costa
- Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Angela T. S. Wyse
- Laboratório de Neuroproteção e Doenças Metabólicas, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde (ICBS), Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Robson Coutinho-Silva
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Luiz Eduardo Baggio Savio
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
- *Correspondence: Luiz Eduardo Baggio Savio,
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Xiao Y, Teng Z, Xu J, Qi Q, Guan T, Jiang X, Chen H, Xie X, Dong Y, Lv P. Systemic Immune-Inflammation Index is Associated with Cerebral Small Vessel Disease Burden and Cognitive Impairment. Neuropsychiatr Dis Treat 2023; 19:403-413. [PMID: 36852257 PMCID: PMC9960781 DOI: 10.2147/ndt.s401098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 02/15/2023] [Indexed: 02/23/2023] Open
Abstract
OBJECTIVE This study sought to explore the associations of the systemic immune-inflammation index (SII) with total cerebral small vessel disease (CSVD) burden and cognitive impairment. METHODS We enrolled 201 patients in the retrospective study with complete clinical and laboratory data. The SII was calculated as platelet count × neutrophil count/lymphocyte count. Cognitive function was evaluated by the Mini-Mental State Examination (MMSE). Total CSVD burden was assessed based on magnetic resonance imaging. We performed logistic regression models, Spearman correlation, and mediation analysis to evaluate the associations of SII with CSVD burden and cognitive impairment. RESULTS After adjustment for confounding factors in the multivariate binary logistic regression model, elevated SII (odds ratio [OR], 3.263; 95% confidence interval [CI], 1.577-6.752; P = 0.001) or severe CSVD burden (OR, 2.794; 95% CI, 1.342-5.817; P = 0.006) was significantly associated with the risk of cognitive impairment. Correlation analyses revealed that SII levels were negatively associated with MMSE scores (rs = -0.391, P < 0.001), and positively associated with the total CSVD burden score (rs = 0.361, P < 0.001). Moreover, SII was significantly related to the severity of the CSVD burden (OR, 2.674; 95% CI, 1.359-5.263; P = 0.004). The multivariable-adjusted odds ratios (95% CI) in highest tertile versus lowest tertile of SII were 8.947 (3.315-24.145) for cognitive impairment and 4.945 (2.063-11.854) for severe CSVD burden, respectively. The effect of higher SII on cognitive impairment development was partly mediated by severe CSVD burden. CONCLUSION Elevated SII is associated with severe CSVD burden and cognitive impairment. The mediating role of severe CSVD burden suggests that higher SII may contribute to cognitive impairment through aggravating CSVD burden.
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Affiliation(s)
- Yining Xiao
- Department of Neurology, Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China.,Department of Neurology, Hebei General Hospital, Shijiazhuang, Hebei, People's Republic of China.,Hebei Provincial Key Laboratory of Cerebral Networks and Cognitive Disorders, Shijiazhuang, Hebei, People's Republic of China
| | - Zhenjie Teng
- Department of Neurology, Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China.,Department of Neurology, Hebei General Hospital, Shijiazhuang, Hebei, People's Republic of China.,Hebei Provincial Key Laboratory of Cerebral Networks and Cognitive Disorders, Shijiazhuang, Hebei, People's Republic of China
| | - Jing Xu
- Department of Neurology, Hebei General Hospital, Shijiazhuang, Hebei, People's Republic of China.,Hebei Provincial Key Laboratory of Cerebral Networks and Cognitive Disorders, Shijiazhuang, Hebei, People's Republic of China
| | - Qianqian Qi
- Department of Neurology, Hebei General Hospital, Shijiazhuang, Hebei, People's Republic of China
| | - Tianyuan Guan
- Department of Neurology, Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China.,Department of Neurology, Hebei General Hospital, Shijiazhuang, Hebei, People's Republic of China
| | - Xin Jiang
- Department of Neurology, Hebei General Hospital, Shijiazhuang, Hebei, People's Republic of China.,Hebei Provincial Key Laboratory of Cerebral Networks and Cognitive Disorders, Shijiazhuang, Hebei, People's Republic of China
| | - Huifang Chen
- Department of Neurology, Hebei General Hospital, Shijiazhuang, Hebei, People's Republic of China
| | - Xiaohua Xie
- Department of Neurology, Hebei General Hospital, Shijiazhuang, Hebei, People's Republic of China
| | - Yanhong Dong
- Department of Neurology, Hebei General Hospital, Shijiazhuang, Hebei, People's Republic of China.,Hebei Provincial Key Laboratory of Cerebral Networks and Cognitive Disorders, Shijiazhuang, Hebei, People's Republic of China
| | - Peiyuan Lv
- Department of Neurology, Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China.,Department of Neurology, Hebei General Hospital, Shijiazhuang, Hebei, People's Republic of China.,Hebei Provincial Key Laboratory of Cerebral Networks and Cognitive Disorders, Shijiazhuang, Hebei, People's Republic of China
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Gao S, Jiang Y, Chen Z, Zhao X, Gu J, Wu H, Liao Y, Sun H, Wang J, Chen W. Metabolic Reprogramming of Microglia in Sepsis-Associated Encephalopathy: Insights from Neuroinflammation. Curr Neuropharmacol 2023; 21:1992-2005. [PMID: 36529923 PMCID: PMC10514522 DOI: 10.2174/1570159x21666221216162606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 10/29/2022] [Accepted: 11/18/2022] [Indexed: 12/23/2022] Open
Abstract
Sepsis-associated encephalopathy (SAE) is a diffuse brain dysfunction caused by sepsis that manifests as a range of brain dysfunctions from delirium to coma. It is a relatively common complication of sepsis associated with poor patient prognosis and mortality. The pathogenesis of SAE involves neuroinflammatory responses, neurotransmitter dysfunction, blood-brain barrier (BBB) disruption, abnormal blood flow regulation, etc. Neuroinflammation caused by hyperactivation of microglia is considered to be a key factor in disease development, which can cause a series of chain reactions, including BBB disruption and oxidative stress. Metabolic reprogramming has been found to play a central role in microglial activation and executive functions. In this review, we describe the pivotal role of energy metabolism in microglial activation and functional execution and demonstrate that the regulation of microglial metabolic reprogramming might be crucial in the development of clinical therapeutics for neuroinflammatory diseases like SAE.
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Affiliation(s)
- Shenjia Gao
- Department of Anesthesiology, Cancer Center, Zhongshan Hospital, Fudan University, 180# Feng-Lin Road, Shanghai, 200032, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai, China
| | - Yi Jiang
- Department of Anesthesiology, Cancer Center, Zhongshan Hospital, Fudan University, 180# Feng-Lin Road, Shanghai, 200032, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai, China
| | - Zhaoyuan Chen
- Department of Anesthesiology, Cancer Center, Zhongshan Hospital, Fudan University, 180# Feng-Lin Road, Shanghai, 200032, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai, China
| | - Xiaoqiang Zhao
- Department of Integrative Medicine and Neurobiology, School of Basic Medical Science, State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, 200032, China
| | - Jiahui Gu
- Department of Anesthesiology, Cancer Center, Zhongshan Hospital, Fudan University, 180# Feng-Lin Road, Shanghai, 200032, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai, China
| | - Han Wu
- Department of Anesthesiology, Cancer Center, Zhongshan Hospital, Fudan University, 180# Feng-Lin Road, Shanghai, 200032, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai, China
| | - Yun Liao
- Shanghai Medical College of Fudan University, Shanghai, China
| | - Hao Sun
- Department of Anesthesiology, Cancer Center, Zhongshan Hospital, Fudan University, 180# Feng-Lin Road, Shanghai, 200032, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai, China
| | - Jun Wang
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai, China
| | - Wankun Chen
- Department of Anesthesiology, Cancer Center, Zhongshan Hospital, Fudan University, 180# Feng-Lin Road, Shanghai, 200032, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai, China
- Fudan Zhangjiang Institute, Shanghai, 201203, China
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Tang C, Jin Y, Wang H. The biological alterations of synapse/synapse formation in sepsis-associated encephalopathy. Front Synaptic Neurosci 2022; 14:1054605. [PMID: 36530954 PMCID: PMC9755596 DOI: 10.3389/fnsyn.2022.1054605] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 11/18/2022] [Indexed: 06/12/2024] Open
Abstract
Sepsis-associated encephalopathy (SAE) is a common complication caused by sepsis, and is responsible for increased mortality and poor outcomes in septic patients. Neurological dysfunction is one of the main manifestations of SAE patients. Patients may still have long-term cognitive impairment after hospital discharge, and the underlying mechanism is still unclear. Here, we first outline the pathophysiological changes of SAE, including neuroinflammation, glial activation, and blood-brain barrier (BBB) breakdown. Synapse dysfunction is one of the main contributors leading to neurological impairment. Therefore, we summarized SAE-induced synaptic dysfunction, such as synaptic plasticity inhibition, neurotransmitter imbalance, and synapses loss. Finally, we discuss the alterations in the synapse, synapse formation, and mediators associated with synapse formation during SAE. In this review, we focus on the changes in synapse/synapse formation caused by SAE, which can further understand the synaptic dysfunction associated with neurological impairment in SAE and provide important insights for exploring appropriate therapeutic targets of SAE.
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Affiliation(s)
| | | | - Huan Wang
- College of Life and Health, Dalian University, Dalian, China
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de Medeiros Borges H, Dagostin CS, Córneo E, Dondossola ER, Bernardo HT, Pickler KDP, da Costa Pereira B, de Oliveira MA, Scussel R, Michels M, Machado-de-Ávila RA, Dal-Pizzol F, Rico EP. Zebrafish as a potential model for stroke: A comparative study with standardized models. Life Sci 2022; 312:121200. [PMID: 36435227 DOI: 10.1016/j.lfs.2022.121200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 11/11/2022] [Accepted: 11/12/2022] [Indexed: 11/25/2022]
Abstract
Animal models of cerebral ischemia have improved our understanding of the pathophysiology and mechanisms involved in stroke, as well as the investigation of potential therapies. The potential of zebrafish to model human diseases has become increasingly evident. The availability of these models allows for an increased understanding of the role of chemical exposure in human conditions and provides essential tools for mechanistic studies of disease. To evaluate the potential neuroprotective properties of minocycline against ischemia and reperfusion injury in zebrafish and compare them with other standardized models. In vitro studies with BV-2 cells were performed, and mammalian transient middle cerebral artery occlusion (tMCAO) was used as a comparative standard with the zebrafish stroke model. Animals were subjected to ischemia and reperfusion injury protocols and treated with minocycline. Infarction size, cytokine levels, oxidative stress, glutamate toxicity, and immunofluorescence for microglial activation, and behavioral test results were determined and compared. Administration of minocycline provided significant protection in the three stroke models in different parameters analyzed. Both experimental models complement each other in their particularities. The proposal also strengthens the findings in the literature in rodent models and allows the validation of alternative models so that they can be used in further research involving diseases with ischemia and reperfusion injury.
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Affiliation(s)
- Heloisa de Medeiros Borges
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, Brazil; Translational Psychiatry Laboratory, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, SC, Brazil
| | - Caroline Serafim Dagostin
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, Brazil
| | - Emily Córneo
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, Brazil
| | - Eduardo Ronconi Dondossola
- Translational Psychiatry Laboratory, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, SC, Brazil
| | - Henrique Teza Bernardo
- Translational Psychiatry Laboratory, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, SC, Brazil
| | - Karolyne De Pieri Pickler
- Translational Psychiatry Laboratory, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, SC, Brazil
| | - Bárbara da Costa Pereira
- Translational Psychiatry Laboratory, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, SC, Brazil
| | - Mariane Amanda de Oliveira
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, Brazil
| | - Rahisa Scussel
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, Brazil
| | - Monique Michels
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, Brazil; Gabbia Biotechnology Company, Barra Velha, Santa Catarina, Brazil
| | - Ricardo Andrez Machado-de-Ávila
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, Brazil
| | - Felipe Dal-Pizzol
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, Brazil
| | - Eduardo Pacheco Rico
- Translational Psychiatry Laboratory, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, SC, Brazil.
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Dominguini D, Michels M, Wessler LB, Streck EL, Barichello T, Dal-Pizzol F. Mitochondrial protective effects caused by the administration of mefenamic acid in sepsis. J Neuroinflammation 2022; 19:268. [PMID: 36333747 PMCID: PMC9636698 DOI: 10.1186/s12974-022-02616-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 09/28/2022] [Indexed: 11/06/2022] Open
Abstract
The pathophysiology of sepsis may involve the activation of the NOD-type receptor containing the pyrin-3 domain (NLPR-3), mitochondrial and oxidative damages. One of the primary essential oxidation products is 8-oxoguanine (8-oxoG), and its accumulation in mitochondrial DNA (mtDNA) induces cell dysfunction and death, leading to the hypothesis that mtDNA integrity is crucial for maintaining neuronal function during sepsis. In sepsis, the modulation of NLRP-3 activation is critical, and mefenamic acid (MFA) is a potent drug that can reduce inflammasome activity, attenuating the acute cerebral inflammatory process. Thus, this study aimed to evaluate the administration of MFA and its implications for the reduction of inflammatory parameters and mitochondrial damage in animals submitted to polymicrobial sepsis. To test our hypothesis, adult male Wistar rats were submitted to the cecal ligation and perforation (CLP) model for sepsis induction and after receiving an injection of MFA (doses of 10, 30, and 50 mg/kg) or sterile saline (1 mL/kg). At 24 h after sepsis induction, the frontal cortex and hippocampus were dissected to analyze the levels of TNF-α, IL-1β, and IL-18; oxidative damage (thiobarbituric acid reactive substances (TBARS), carbonyl, and DCF-DA (oxidative parameters); protein expression (mitochondrial transcription factor A (TFAM), NLRP-3, 8-oxoG; Bax, Bcl-2 and (ionized calcium-binding adaptor molecule 1 (IBA-1)); and the activity of mitochondrial respiratory chain complexes. It was observed that the septic group in both structures studied showed an increase in proinflammatory cytokines mediated by increased activity in NLRP-3, with more significant oxidative damage and higher production of reactive oxygen species (ROS) by mitochondria. Damage to mtDNA it was also observed with an increase in 8-oxoG levels and lower levels of TFAM and NGF-1. In addition, this group had an increase in pro-apoptotic proteins and IBA-1 positive cells. However, MFA at doses of 30 and 50 mg/kg decreased inflammasome activity, reduced levels of cytokines and oxidative damage, increased bioenergetic efficacy and reduced production of ROS and 8-oxoG, and increased levels of TFAM, NGF-1, Bcl-2, reducing microglial activation. As a result, it is suggested that MFA induces protection in the central nervous system early after the onset of sepsis.
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Affiliation(s)
- Diogo Dominguini
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, SC, 88806-000, Brazil.
| | - Monique Michels
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, SC, 88806-000, Brazil
| | - Leticia B Wessler
- Laboratory of Bioenergetics, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, SC, 88806-000, Brazil
| | - Emilio L Streck
- Laboratory of Bioenergetics, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, SC, 88806-000, Brazil
| | - Tatiana Barichello
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, SC, 88806-000, Brazil
- Translational Psychiatry Program, Department of Psychiatry and Behavioral Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX, 77054, USA
| | - Felipe Dal-Pizzol
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, SC, 88806-000, Brazil
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Infection, Learning, and Memory: Focus on Immune Activation and Aversive Conditioning. Neurosci Biobehav Rev 2022; 142:104898. [PMID: 36183862 DOI: 10.1016/j.neubiorev.2022.104898] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 09/19/2022] [Accepted: 09/27/2022] [Indexed: 11/22/2022]
Abstract
Here we review the effects of immune activation primarily via lipopolysaccharide (LPS), a cell wall component of Gram-negative bacteria, on hippocampal and non-hippocampal-dependent learning and memory. Rodent studies have found that LPS alters both the acquisition and consolidation of aversive learning and memory, such as those evoking evolutionarily adaptive responses like fear and disgust. The inhibitory effects of LPS on the acquisition and consolidation of contextual fear memory are discussed. LPS-induced alterations in the acquisition of taste and place-related conditioned disgust memory within bottle preference tasks and taste reactivity tests (taste-related), in addition to conditioned context avoidance tasks and the anticipatory nausea paradigm (place-related), are highlighted. Further, conditioned disgust memory consolidation may also be influenced by LPS-induced effects. Growing evidence suggests a central role of immune activation, especially pro-inflammatory cytokine activity, in eliciting the effects described here. Understanding how infection-induced immune activation alters learning and memory is increasingly important as bacterial and viral infections are found to present a risk of learning and memory impairment.
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Lei W, Ren Z, Su J, Zheng X, Gao L, Xu Y, Deng J, Xiao C, Sheng S, Cheng Y, Ma T, Liu Y, Wang P, Luo OJ, Chen G, Wang Z. Immunological risk factors for sepsis-associated delirium and mortality in ICU patients. Front Immunol 2022; 13:940779. [PMID: 36203605 PMCID: PMC9531264 DOI: 10.3389/fimmu.2022.940779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 08/22/2022] [Indexed: 11/22/2022] Open
Abstract
Background A major challenge in intervention of critical patients, especially sepsis-associated delirium (SAD) intervention, is the lack of predictive risk factors. As sepsis and SAD are heavily entangled with inflammatory and immunological processes, to identify the risk factors of SAD and mortality in the intensive care unit (ICU) and determine the underlying molecular mechanisms, the peripheral immune profiles of patients in the ICU were characterized. Methods This study contains a cohort of 52 critical patients who were admitted to the ICU of the First Affiliated Hospital of Jinan University. Comorbidity, including sepsis and SAD, of this cohort was diagnosed and recorded. Furthermore, peripheral blood samples were collected on days 1, 3, and 5 of admission for peripheral immune profiling with blood routine examination, flow cytometry, ELISA, RNA-seq, and qPCR. Results The patients with SAD had higher mortality during ICU admission and within 28 days of discharge. Compared with survivors, nonsurvivors had higher neutrophilic granulocyte percentage, higher CRP concentration, lower monocyte count, lower monocyte percentage, lower C3 complement level, higher CD14loCD16+ monocytes percentage, and higher levels of IL-6 and TNFα. The CD14hiCD16- monocyte percentage manifested favorable prediction values for the occurrence of SAD. Differentially expressed genes between the nonsurvival and survival groups were mainly associated with immune response and metabolism process. The longitudinal expression pattern of SLC2A1 and STIMATE were different between nonsurvivors and survivors, which were validated by qPCR. Conclusions Nonsurvival critical patients have a distinct immune profile when compared with survival patients. CD14hiCD16- monocyte prevalence and expression levels of SLC2A1 and STIMATE may be predictors of SAD and 28-day mortality in ICU patients.
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Affiliation(s)
- Wen Lei
- Department of Microbiology and Immunology, School of Medicine, Jinan University, Guangzhou, China
- Institute of Geriatric Immunology, School of Medicine, Jinan University, Guangzhou, China
- Guangdong-Hong Kong-Macau Great Bay Area Geroscience Joint Laboratory, Jinan University, Guangzhou, China
| | - Zhiyao Ren
- Guangdong-Hong Kong-Macau Great Bay Area Geroscience Joint Laboratory, Jinan University, Guangzhou, China
- Department of Systems Biomedical Sciences, School of Medicine, Jinan University, Guangzhou, China
- National Health Commission (NHC) Key Laboratory of Male Reproduction and Genetics, Guangzhou, China
- Department of Central Laboratory, Guangdong Provincial Reproductive Science Institute (Guangdong Provincial Fertility Hospital), Guangzhou, China
| | - Jun Su
- Guangdong-Hong Kong-Macau Great Bay Area Geroscience Joint Laboratory, Jinan University, Guangzhou, China
- Department of Sonograph, The First Affiliated Hospital, Jinan University, Guangzhou, China
| | - Xinglong Zheng
- Guangdong-Hong Kong-Macau Great Bay Area Geroscience Joint Laboratory, Jinan University, Guangzhou, China
- Department of Critical Care Medicine, The First Affiliated Hospital, Jinan University, Guangzhou, China
| | - Lijuan Gao
- Department of Microbiology and Immunology, School of Medicine, Jinan University, Guangzhou, China
- Institute of Geriatric Immunology, School of Medicine, Jinan University, Guangzhou, China
- Guangdong-Hong Kong-Macau Great Bay Area Geroscience Joint Laboratory, Jinan University, Guangzhou, China
| | - Yudai Xu
- Department of Microbiology and Immunology, School of Medicine, Jinan University, Guangzhou, China
- Institute of Geriatric Immunology, School of Medicine, Jinan University, Guangzhou, China
- Guangdong-Hong Kong-Macau Great Bay Area Geroscience Joint Laboratory, Jinan University, Guangzhou, China
| | - Jieping Deng
- Department of Microbiology and Immunology, School of Medicine, Jinan University, Guangzhou, China
- Institute of Geriatric Immunology, School of Medicine, Jinan University, Guangzhou, China
- Guangdong-Hong Kong-Macau Great Bay Area Geroscience Joint Laboratory, Jinan University, Guangzhou, China
| | - Chanchan Xiao
- Department of Microbiology and Immunology, School of Medicine, Jinan University, Guangzhou, China
- Institute of Geriatric Immunology, School of Medicine, Jinan University, Guangzhou, China
- Guangdong-Hong Kong-Macau Great Bay Area Geroscience Joint Laboratory, Jinan University, Guangzhou, China
| | - Shuai Sheng
- Guangdong-Hong Kong-Macau Great Bay Area Geroscience Joint Laboratory, Jinan University, Guangzhou, China
| | - Yu Cheng
- Department of Microbiology and Immunology, School of Medicine, Jinan University, Guangzhou, China
- Institute of Geriatric Immunology, School of Medicine, Jinan University, Guangzhou, China
| | - Tianshun Ma
- Department of Microbiology and Immunology, School of Medicine, Jinan University, Guangzhou, China
- Institute of Geriatric Immunology, School of Medicine, Jinan University, Guangzhou, China
| | - Yu Liu
- Guangdong-Hong Kong-Macau Great Bay Area Geroscience Joint Laboratory, Jinan University, Guangzhou, China
| | - Pengcheng Wang
- Department of Microbiology and Immunology, School of Medicine, Jinan University, Guangzhou, China
- Institute of Geriatric Immunology, School of Medicine, Jinan University, Guangzhou, China
- Guangdong-Hong Kong-Macau Great Bay Area Geroscience Joint Laboratory, Jinan University, Guangzhou, China
| | - Oscar Junhong Luo
- Guangdong-Hong Kong-Macau Great Bay Area Geroscience Joint Laboratory, Jinan University, Guangzhou, China
- Department of Systems Biomedical Sciences, School of Medicine, Jinan University, Guangzhou, China
- *Correspondence: Zhigang Wang, ; Guobing Chen, ; Oscar Junhong Luo,
| | - Guobing Chen
- Department of Microbiology and Immunology, School of Medicine, Jinan University, Guangzhou, China
- Institute of Geriatric Immunology, School of Medicine, Jinan University, Guangzhou, China
- Guangdong-Hong Kong-Macau Great Bay Area Geroscience Joint Laboratory, Jinan University, Guangzhou, China
- Department of Sonograph, The First Affiliated Hospital, Jinan University, Guangzhou, China
- *Correspondence: Zhigang Wang, ; Guobing Chen, ; Oscar Junhong Luo,
| | - Zhigang Wang
- Guangdong-Hong Kong-Macau Great Bay Area Geroscience Joint Laboratory, Jinan University, Guangzhou, China
- Department of Critical Care Medicine, The First Affiliated Hospital, Jinan University, Guangzhou, China
- *Correspondence: Zhigang Wang, ; Guobing Chen, ; Oscar Junhong Luo,
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Peripheral Transplantation of Mesenchymal Stem Cells at Sepsis Convalescence Improves Cognitive Function of Sepsis Surviving Mice. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:6897765. [PMID: 36193078 PMCID: PMC9526624 DOI: 10.1155/2022/6897765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 08/10/2022] [Accepted: 08/31/2022] [Indexed: 11/17/2022]
Abstract
Objective To investigate the effects of peripheral transplantation of mesenchymal stem cells (MSCs) at sepsis convalescence on post-sepsis cognitive function and underlying mechanisms in mice. Methods Sepsis was induced by cecal ligation and puncture (CLP) in mice. Bone marrow-derived MSCs from mice were cultured and injected via tail vein on the 8th day after CLP. Cognitive function was detected in open field, novel object recognition task, and delayed matching-to-place water maze task during 10-26 days after CLP. Neuroinflammation, neurogenesis, and peripheral inflammation were detected on the 12th and 31th days after CLP. MSCs tracing was detected during 8-10 days after CLP. Results Transplanted MSCs were located at peripheral organs (lung, spleen, liver) and had no obvious effects on survival and weight of sepsis mice. Transplanted MSCs mitigated cognitive impairments and hippocampal microglial activation, improved hippocampal neurogenesis of sepsis surviving mice, and had no obvious effect on the leukocyte amount, the neutrophil percentage, and the inflammatory factors of peripheral blood, and the hippocampal inflammatory factors. Conclusions Our data indicated that MSCs transplantation via peripheral vein at later phase of sepsis can improve post-sepsis cognitive impairment and hippocampal neurogenesis of sepsis surviving mice.
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Yan X, Yang K, Xiao Q, Hou R, Pan X, Zhu X. Central role of microglia in sepsis-associated encephalopathy: From mechanism to therapy. Front Immunol 2022; 13:929316. [PMID: 35958583 PMCID: PMC9361477 DOI: 10.3389/fimmu.2022.929316] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 06/22/2022] [Indexed: 11/20/2022] Open
Abstract
Sepsis-associated encephalopathy (SAE) is a cognitive impairment associated with sepsis that occurs in the absence of direct infection in the central nervous system or structural brain damage. Microglia are thought to be macrophages of the central nervous system, devouring bits of neuronal cells and dead cells in the brain. They are activated in various ways, and microglia-mediated neuroinflammation is characteristic of central nervous system diseases, including SAE. Here, we systematically described the pathogenesis of SAE and demonstrated that microglia are closely related to the occurrence and development of SAE. Furthermore, we comprehensively discussed the function and phenotype of microglia and summarized their activation mechanism and role in SAE pathogenesis. Finally, this review summarizes recent studies on treating cognitive impairment in SAE by blocking microglial activation and toxic factors produced after activation. We suggest that targeting microglial activation may be a putative treatment for SAE.
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Affiliation(s)
- Xiaoqian Yan
- Department of Critical Care Medicine, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Kaiying Yang
- Department of Neurology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Qi Xiao
- Department of Neurology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Rongyao Hou
- Department of Neurology, The Affiliated Hiser Hospital of Qingdao University, Qingdao, China
- *Correspondence: Rongyao Hou, ; Xudong Pan, ; Xiaoyan Zhu,
| | - Xudong Pan
- Department of Neurology, The Affiliated Hospital of Qingdao University, Qingdao, China
- *Correspondence: Rongyao Hou, ; Xudong Pan, ; Xiaoyan Zhu,
| | - Xiaoyan Zhu
- Department of Critical Care Medicine, The Affiliated Hospital of Qingdao University, Qingdao, China
- *Correspondence: Rongyao Hou, ; Xudong Pan, ; Xiaoyan Zhu,
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Zhao L, Li Y, Wang Y, Ge Z, Zhu H, Zhou X, Li Y. Non-hepatic Hyperammonemia: A Potential Therapeutic Target for Sepsis-associated Encephalopathy. CNS & NEUROLOGICAL DISORDERS DRUG TARGETS 2022; 21:738-751. [PMID: 34939553 DOI: 10.2174/1871527321666211221161534] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 10/10/2021] [Accepted: 10/26/2021] [Indexed: 11/22/2022]
Abstract
Sepsis-Associated Encephalopathy (SAE) is a common complication in the acute phase of sepsis, and patients who develop SAE have a higher mortality rate, longer hospital stay, and worse quality of life than other sepsis patients. Although the incidence of SAE is as high as 70% in sepsis patients, no effective treatment is available for this condition. To develop an effective treatment for SAE, it is vital to explore its pathogenesis. It is known that hyperammonemia is a possible factor in the pathogenesis of hepatic encephalopathy as ammonia is a potent neurotoxin. Furthermore, our previous studies indicate that non-hepatic hyperammonemia seems to occur more often in sepsis patients; it was also found that >50% of sepsis patients with non-hepatic hyperammonemia exhibited encephalopathy and delirium. Substatistical analyses indicate that non-hepatic hyperammonemia is an independent risk factor for SAE. This study updates the definition, clinical manifestations, and diagnosis of SAE; it also investigates the possible treatment options available for non-hepatic hyperammonemia in patients with sepsis and the mechanisms by which non-hepatic hyperammonemia causes encephalopathy.
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Affiliation(s)
- Lina Zhao
- Emergency Department, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Yun Li
- Department of Anesthesiology, Chifeng Municipal Hospital, Chifeng Clinical Medical College of Inner Mongolia Medical University, Chifeng 024000, China
| | - Yunying Wang
- Department of Critical Care Medicine, Chifeng Municipal Hospital, Chifeng Clinical Medical College of Inner Mongolia Medical University, Chifeng 024000, China
| | - Zengzheng Ge
- Emergency Department, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Huadong Zhu
- Emergency Department, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Xiuhua Zhou
- Department of Critical Care Medicine, The Fourth Affiliated Hospital of China Medical University, Shenyang 110032, China
| | - Yi Li
- Emergency Department, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
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Córneo E, Michels M, Abatti M, Vieira A, Gonçalves RC, Gabriel FF, Borges H, Goulart A, da Silva Matos N, Dominguini D, Varela R, Valvassori S, Dal-Pizzol F. Enriched environment causes epigenetic changes in hippocampus and improves long-term cognitive function in sepsis. Sci Rep 2022; 12:11529. [PMID: 35798809 PMCID: PMC9262921 DOI: 10.1038/s41598-022-14660-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 06/10/2022] [Indexed: 11/16/2022] Open
Abstract
Sepsis is defined as a life-threatening organ dysfunction caused by an inappropriate host response to infection. The presence of oxidative stress and inflammatory mediators in sepsis leads to dysregulated gene expression, leading to a hyperinflammatory response. Environmental conditions play an important role in various pathologies depending on the stimulus it presents. A standard environment condition (SE) may offer reduced sensory and cognitive stimulation, but an enriched environment improves spatial learning, prevents cognitive deficits induced by disease stress, and is an important modulator of epigenetic enzymes. The study evaluated the epigenetic alterations and the effects of the environmental enrichment (EE) protocol in the brain of animals submitted to sepsis by cecal ligation and perforation (CLP). Male Wistar rats were divided into sham and CLP at 24 h, 72 h, 10 days and 30 days after sepsis. Other male Wistar rats were distributed in a SE or in EE for forty-five days. Behavioral tests, analysis of epigenetic enzymes:histone acetylase (HAT), histone deacetylase (HDAC) and DNA methyltransferase (DNMT), biochemical and synaptic plasticity analyzes were performed. An increase in HDAC and DNMT activities was observed at 72 h, 10 days and 30 days. There was a positive correlation between epigenetic enzymes DNMT and HDAC 24 h, 10 days and 30 days. After EE, HDAC and DNMT enzyme activity decreased, cognitive impairment was reversed, IL1-β levels decreased and there was an increase in PSD-95 levels in the hippocampus. Interventions in environmental conditions can modulate the outcomes of long-term cognitive consequences associated with sepsis, supporting the idea of the potential benefits of EE.
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Affiliation(s)
- Emily Córneo
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Av. Universitária, 1105, Criciúma, SC, 88806000, Brazil.
| | - Monique Michels
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Av. Universitária, 1105, Criciúma, SC, 88806000, Brazil
| | - Mariane Abatti
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Av. Universitária, 1105, Criciúma, SC, 88806000, Brazil
| | - Andriele Vieira
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Av. Universitária, 1105, Criciúma, SC, 88806000, Brazil
| | - Renata Casagrande Gonçalves
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Av. Universitária, 1105, Criciúma, SC, 88806000, Brazil
| | - Filipe Fernandes Gabriel
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Av. Universitária, 1105, Criciúma, SC, 88806000, Brazil
| | - Heloisa Borges
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Av. Universitária, 1105, Criciúma, SC, 88806000, Brazil
| | - Amanda Goulart
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Av. Universitária, 1105, Criciúma, SC, 88806000, Brazil
| | - Natan da Silva Matos
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Av. Universitária, 1105, Criciúma, SC, 88806000, Brazil
| | - Diogo Dominguini
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Av. Universitária, 1105, Criciúma, SC, 88806000, Brazil
| | - Roger Varela
- Translational Psychiatry Laboratory, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, SC, Brazil
| | - Samira Valvassori
- Translational Psychiatry Laboratory, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, SC, Brazil
| | - Felipe Dal-Pizzol
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Av. Universitária, 1105, Criciúma, SC, 88806000, Brazil
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Liu YX, Yu Y, Liu JP, Liu WJ, Cao Y, Yan RM, Yao YM. Neuroimmune Regulation in Sepsis-Associated Encephalopathy: The Interaction Between the Brain and Peripheral Immunity. Front Neurol 2022; 13:892480. [PMID: 35832175 PMCID: PMC9271799 DOI: 10.3389/fneur.2022.892480] [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: 03/09/2022] [Accepted: 05/27/2022] [Indexed: 11/15/2022] Open
Abstract
Sepsis-associated encephalopathy (SAE), the most popular cause of coma in the intensive care unit (ICU), is the diffuse cerebral damage caused by the septic challenge. SAE is closely related to high mortality and extended cognitive impairment in patients in septic shock. At present, many studies have demonstrated that SAE might be mainly associated with blood–brain barrier damage, abnormal neurotransmitter secretion, oxidative stress, and neuroimmune dysfunction. Nevertheless, the precise mechanism which initiates SAE and contributes to the long-term cognitive impairment remains largely unknown. Recently, a growing body of evidence has indicated that there is close crosstalk between SAE and peripheral immunity. The excessive migration of peripheral immune cells to the brain, the activation of glia, and resulting dysfunction of the central immune system are the main causes of septic nerve damage. This study reviews the update on the pathogenesis of septic encephalopathy, focusing on the over-activation of immune cells in the central nervous system (CNS) and the “neurocentral–endocrine–immune” networks in the development of SAE, aiming to further understand the potential mechanism of SAE and provide new targets for diagnosis and management of septic complications.
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Affiliation(s)
- Yu-xiao Liu
- Translational Medicine Research Center, Medical Innovation Research Division and Fourth Medical Center of the Chinese PLA General Hospital, Beijing, China
- Department of Neurosurgery, The Chinese PLA General Hospital, Beijing, China
| | - Yang Yu
- Department of Traditional Chinese Medical Science, Sixth Medical Center of the Chinese PLA General Hospital, Beijing, China
| | - Jing-peng Liu
- Translational Medicine Research Center, Medical Innovation Research Division and Fourth Medical Center of the Chinese PLA General Hospital, Beijing, China
- Department of Traditional Chinese Medical Science, Sixth Medical Center of the Chinese PLA General Hospital, Beijing, China
| | - Wen-jia Liu
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing Institute of Lifeomics, Beijing, China
| | - Yang Cao
- Department of Neurosurgery, The Chinese PLA General Hospital, Beijing, China
| | - Run-min Yan
- Department of Neurosurgery, The Chinese PLA General Hospital, Beijing, China
- *Correspondence: Yong-ming Yao
| | - Yong-ming Yao
- Translational Medicine Research Center, Medical Innovation Research Division and Fourth Medical Center of the Chinese PLA General Hospital, Beijing, China
- Run-min Yan
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Pathogenesis of sepsis-associated encephalopathy: more than blood-brain barrier dysfunction. Mol Biol Rep 2022; 49:10091-10099. [PMID: 35639274 DOI: 10.1007/s11033-022-07592-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 05/11/2022] [Indexed: 12/19/2022]
Abstract
Sepsis-associated encephalopathy is a common neurological complication of sepsis and is responsible for higher mortality and poorer long-term outcomes in septic patients. Sepsis-associated encephalopathy symptoms can range from mild delirium to deep coma, which occurs in up to 70% of patients in intensive care units. The pathological changes in the brain associated with sepsis include cerebral ischaemia, cerebral haemorrhage, abscess and progressive multifocal necrotic leukoencephalopathy. Several mechanisms are involved in the pathogenesis of sepsis-associated encephalopathy, such as blood-brain barrier dysfunction, cerebral blood flow impairment, glial cell activation, leukocyte transmigration, and neurotransmitter disturbances. These events are interrelated and influence each other, therefore they do not act as independent factors. This review is focused on new evidence showing the pathological process of sepsis-associated encephalopathy.
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Ito H, Hosomi S, Koyama Y, Matsumoto H, Imamura Y, Ogura H, Oda J. Sepsis-Associated Encephalopathy: A Mini-Review of Inflammation in the Brain and Body. Front Aging Neurosci 2022; 14:912866. [PMID: 35711904 PMCID: PMC9195626 DOI: 10.3389/fnagi.2022.912866] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 05/06/2022] [Indexed: 11/13/2022] Open
Abstract
Sepsis is defined as a life-threatening multi-organ dysfunction triggered by an uncontrolled host response to infectious disease. Systemic inflammation elicited by sepsis can cause acute cerebral dysfunction, characterized by delirium, coma, and cognitive dysfunction, known as septic encephalopathy. Recent evidence has reported the underlying mechanisms of sepsis. However, the reasons for the development of inflammation and degeneration in some brain regions and the persistence of neuroinflammation remain unclear. This mini-review describes the pathophysiology of region-specific inflammation after sepsis-associated encephalopathy (SAE), clinical features, and future prospects for SAE treatment. The hippocampus is highly susceptible to inflammation, and studies that perform treatments with antibodies to cytokine receptors, such as interleukin-1β, are in progress. Future development of clinically applicable therapies is expected.
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Affiliation(s)
- Hiroshi Ito
- Department of Traumatology and Acute Critical Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Sanae Hosomi
- Department of Traumatology and Acute Critical Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan
- *Correspondence: Sanae Hosomi,
| | - Yoshihisa Koyama
- Department of Neuroscience and Cell Biology, Osaka University Graduate School of Medicine, Osaka, Japan
- Addiction Research Unit, Osaka Psychiatric Research Center, Osaka Psychiatric Medical Center, Osaka, Japan
| | - Hisatake Matsumoto
- Department of Traumatology and Acute Critical Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Yukio Imamura
- Department of Traumatology and Acute Critical Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Hiroshi Ogura
- Department of Traumatology and Acute Critical Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Jun Oda
- Department of Traumatology and Acute Critical Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan
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Li Y, Ji M, Yang J. Current Understanding of Long-Term Cognitive Impairment After Sepsis. Front Immunol 2022; 13:855006. [PMID: 35603184 PMCID: PMC9120941 DOI: 10.3389/fimmu.2022.855006] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 04/11/2022] [Indexed: 11/13/2022] Open
Abstract
Sepsis is recognized as a life-threatening multi-organ dysfunction resulting from a dysregulated host response to infection. Although the incidence and mortality of sepsis decrease significantly due to timely implementation of anti-infective and support therapies, accumulating evidence suggests that a great proportion of survivors suffer from long-term cognitive impairment after hospital discharge, leading to decreased life quality and substantial caregiving burdens for family members. Several mechanisms have been proposed for long-term cognitive impairment after sepsis, which are not mutually exclusive, including blood-brain barrier disruption, neuroinflammation, neurotransmitter dysfunction, and neuronal loss. Targeting these critical processes might be effective in preventing and treating long-term cognitive impairment. However, future in-depth studies are required to facilitate preventive and/or treatment strategies for long-term cognitive impairment after sepsis.
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Affiliation(s)
- Ying Li
- Department of Anesthesiology, Jiangyin Hospital, Affiliated to Southeast University Medical School, Jiangyin, China
| | - Muhuo Ji
- Department of Anesthesiology, The Second Affiliated Hospital, Nanjing Medical University, Nanjing, China
| | - Jianjun Yang
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
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Salmani H, Hosseini M, Nabi MM, Samadi-Noshahr Z, Baghcheghi Y, Sadeghi M. Exacerbated immune response of the brain to peripheral immune challenge in post-septic mice. Brain Res Bull 2022; 185:74-85. [PMID: 35523357 DOI: 10.1016/j.brainresbull.2022.04.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 04/24/2022] [Accepted: 04/26/2022] [Indexed: 11/02/2022]
Abstract
BACKGROUND Mounting evidence indicates that sepsis can induce long-lasting brain dysfunction. Recently, it has been proposed that the brain may become more sensitive to systemic inflammation if microglial cells are already primed. Microglial priming has been demonstrated in aging, traumatic brain injury, and neurodegenerative diseases. There is evidence suggesting that systemic inflammation may also prime microglia. This study aimed to investigate the brain's response to a second immune challenge in sepsis survivors and the possible role of microglial priming. METHODS Adult BALB/c mice were intraperitoneally (ip) injected with 5 mg/kg lipopolysaccharide (LPS) for sepsis induction. One month later, mice received a second immune challenge (LPS, 0.33 mg/kg). A cohort of mice was sacrificed 2 h post-LPS injection to measure inflammatory mediators mRNA expression. The second cohort of mice was tested on a battery of behavioral tests and then sacrificed, and brain tissues were removed for biochemical analyses. RESULTS Results showed that in septic mice, secondary LPS challenge induced heightened neuroinflammation compared to the control mice, as evident by a significant increase of IL-1β, TNF-α, and iNOS mRNA expression. In the immunochallenged septic mice, the anti-inflammatory cytokine IL-10 expression was also significantly increased compared to the control mice. Sepsis induction significantly disrupted the recognition ability in the novel object recognition, but the second immune challenge had no significant effect. However, immunochallenged septic mice exhibited more anxiety-like behavior in the marble burying task and intensive depressive-like behavior in the forced swim test. Additionally, the second immune challenge reduced arginase-1 levels in septic but not control mice. On the other hand, CIITA levels were increased more significantly in the LPS injected control mice compared to septic mice. Neither sepsis nor the second immune challenge significantly affected inhibitory avoidance behavior and Aβ1-42 levels in brain tissue. CONCLUSION Our finding suggests that low-grade immune challenge can induce exacerbated behavioral change and exaggerated inflammatory response in the brain of post-septic mice.
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Affiliation(s)
- Hossein Salmani
- Division of Neurocognitive Sciences, Psychiatry and Behavioral Sciences Research Center, Mashhad University of Medical Sciences, Mashhad, Iran; Student Research Committee, Jiroft University of Medical Sciences, Jiroft, Iran.
| | - Mahmoud Hosseini
- Division of Neurocognitive Sciences, Psychiatry and Behavioral Sciences Research Center, Mashhad University of Medical Sciences, Mashhad, Iran; Applied Biomedical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
| | - Mohammad Mahdi Nabi
- Mashhad Branch, Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Mashhad, Iran; Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran.
| | | | - Yousef Baghcheghi
- Student Research Committee, Jiroft University of Medical Sciences, Jiroft, Iran.
| | - Mostafa Sadeghi
- Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran.
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