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Qi M, Liu R, Zhang F, Yao Z, Zhou ML, Jiang X, Ling S. Roles of mechanosensitive ion channel PIEZO1 in the pathogenesis of brain injury after experimental intracerebral hemorrhage. Neuropharmacology 2024; 251:109896. [PMID: 38490299 DOI: 10.1016/j.neuropharm.2024.109896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 02/17/2024] [Accepted: 03/03/2024] [Indexed: 03/17/2024]
Abstract
Secondary brain injury after intracerebral hemorrhage (ICH) is the main cause of poor prognosis in ICH patients, but the underlying mechanisms remain less known. The involvement of Piezo1 in brain injury after ICH was studied in a mouse model of ICH. ICH was established by injecting autologous arterial blood into the basal ganglia in mice. After vehicle, Piezo1 blocker, GsMTx4, Piezo1 activator, Yoda-1, or together with mannitol (tail vein injection) was injected into the left lateral ventricle of mouse brain, Piezo1 level and the roles of Piezo1 in neuronal injury, brain edema, and neurological dysfunctions after ICH were determined by the various indicated methods. Piezo1 protein level in neurons was significantly upregulated 24 h after ICH in vivo (human and mice). Piezo1 protein level was also dramatically upregulated in HT22 cells (a murine neuron cell line) cultured in vitro 24 h after hemin treatment as an in vitro ICH model. GsMTx4 treatment or together with mannitol significantly downregulated Piezo1 and AQP4 levels, markedly increased Bcl2 level, maintained more neurons alive, considerably restored brain blood flow, remarkably relieved brain edema, substantially decreased serum IL-6 level, and almost fully reversed the neurological dysfunctions at ICH 24 h group mice. In contrast, Yoda-1 treatment achieved the opposite effects. In conclusion, Piezo1 plays a crucial role in the pathogenesis of brain injury after ICH and may be a target for clinical treatment of ICH.
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Affiliation(s)
- Min Qi
- The Translational Research Institute for Neurological Disorders of Wannan Medical College, Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College), No. 2 West Zheshan Road, Wuhu, 241001, Anhui, China; The Institutes of Brain Science, Wannan Medical College, No. 22 Wenchang West Road, Higher Education Park, Wuhu, 241002, Anhui, China
| | - Ran Liu
- The Translational Research Institute for Neurological Disorders of Wannan Medical College, Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College), No. 2 West Zheshan Road, Wuhu, 241001, Anhui, China
| | - Fan Zhang
- The Translational Research Institute for Neurological Disorders of Wannan Medical College, Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College), No. 2 West Zheshan Road, Wuhu, 241001, Anhui, China; School of Chemistry and Chemical Engineering & Interdisciplinary Innovation Institute for Medicine and Engineering, Southeast University, Nanjing, 211189, China
| | - Zhipeng Yao
- The Translational Research Institute for Neurological Disorders of Wannan Medical College, Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College), No. 2 West Zheshan Road, Wuhu, 241001, Anhui, China; School of Chemistry and Chemical Engineering & Interdisciplinary Innovation Institute for Medicine and Engineering, Southeast University, Nanjing, 211189, China
| | - Meng-Liang Zhou
- The Translational Research Institute for Neurological Disorders of Wannan Medical College, Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College), No. 2 West Zheshan Road, Wuhu, 241001, Anhui, China; Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, 210002, China
| | - Xiaochun Jiang
- The Translational Research Institute for Neurological Disorders of Wannan Medical College, Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College), No. 2 West Zheshan Road, Wuhu, 241001, Anhui, China; The Institutes of Brain Science, Wannan Medical College, No. 22 Wenchang West Road, Higher Education Park, Wuhu, 241002, Anhui, China.
| | - Shizhang Ling
- The Translational Research Institute for Neurological Disorders of Wannan Medical College, Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College), No. 2 West Zheshan Road, Wuhu, 241001, Anhui, China; The Institutes of Brain Science, Wannan Medical College, No. 22 Wenchang West Road, Higher Education Park, Wuhu, 241002, Anhui, China.
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Qiu JY, Gao SQ, Chen YS, Wang X, Zhuang YS, Miao SH, Zheng XB, Zhao R, Sun Y, Zhou ML. OXCT1 regulates hippocampal neurogenesis and alleviates cognitive impairment via the Akt/GSK-3β/β-catenin pathway after subarachnoid hemorrhage. Brain Res 2024; 1827:148758. [PMID: 38199308 DOI: 10.1016/j.brainres.2024.148758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 12/28/2023] [Accepted: 01/06/2024] [Indexed: 01/12/2024]
Abstract
BACKGROUND Subarachnoid hemorrhage (SAH) is a life-threatening neurological disease that usually has a poor prognosis. Neurogenesis is a potential therapeutic target for brain injury. Ketone metabolism also plays neuroprotective roles in many neurological disorders. OXCT1 (3-Oxoacid CoA-Transferase 1) is the rate-limiting enzyme of ketone body oxidation. In this study, we explored whether increasing ketone oxidation by upregulating OXCT1 in neurons could promote neurogenesis after SAH, and evaluated the potential mechanism involved in this process. METHODS The β-hydroxybutyrate content was measured using an enzymatic colorimetric assay. Adeno-associated virus targeting neurons was injected to overexpress OXCT1, and the expression and localization of proteins were evaluated by western blotting and immunofluorescence staining. Adult hippocampal neurogenesis was evaluated by dual staining with doublecortin and 5-Ethynyl-2'-Deoxyuridine. LY294002 was intracerebroventricularly administered to inhibit Akt activity. The Morris water maze and Y-maze tests were employed to assess cognitive function after SAH. RESULTS The results showed that OXCT1 expression and hippocampal neurogenesis significantly decreased in the early stage of SAH. Overexpression of OXCT1 successfully increased hippocampal neurogenesis via activation of Akt/GSK-3β/β-catenin signaling and improved cognitive function, both of which were reversed by administration of LY294002. CONCLUSIONS OXCT1 regulated hippocampal ketone body metabolism and increased neurogenesis through mechanisms mediated by the Akt/GSK-3β/β-catenin pathway, improving cognitive impairment after SAH.
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Affiliation(s)
- Jia-Yin Qiu
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Sheng-Qing Gao
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Yu-Sheng Chen
- Department of General Surgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Xue Wang
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Yun-Song Zhuang
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, China
| | - Shu-Hao Miao
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, China
| | - Xiao-Bo Zheng
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing University of Chinese Medicine, Nanjing, China
| | - Ran Zhao
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Yan Sun
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, China
| | - Meng-Liang Zhou
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, China.
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Luo SQ, Gao SQ, Fei MX, Xue-Wang, Yan-Sun, Ran-Zhao, Han YL, Wang HD, Zhou ML. Ligation of cervical lymphatic vessels decelerates blood clearance and worsens outcomes after experimental subarachnoid hemorrhage. Brain Res 2024; 1837:148855. [PMID: 38471644 DOI: 10.1016/j.brainres.2024.148855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 02/28/2024] [Accepted: 03/08/2024] [Indexed: 03/14/2024]
Abstract
Subarachnoid hemorrhage (SAH) is characterized by the extravasation of blood into the subarachnoid space, in which erythrocyte lysis is the primary contributor to cell death and brain injuries. New evidence has indicated that meningeal lymphatic vessels (mLVs) are essential in guiding fluid and macromolecular waste from cerebrospinal fluid (CSF) into deep cervical lymph nodes (dCLNs). However, the role of mLVs in clearing erythrocytes after SAH has not been completely elucidated. Hence, we conducted a cross-species study. Autologous blood was injected into the subarachnoid space of rabbits and rats to induce SAH. Erythrocytes in the CSF were measured with/without deep cervical lymph vessels (dCLVs) ligation. Additionally, prior to inducing SAH, we administered rats with vascular endothelial growth factor C (VEGF-C), which is essential for meningeal lymphangiogenesis and maintaining integrity and survival of lymphatic vessels. The results showed that the blood clearance rate was significantly lower after dCLVs ligation in both the rat and rabbit models. DCLVs ligation aggravated neuroinflammation, neuronal damage, brain edema, and behavioral impairment after SAH. Conversely, the treatment of VEGF-C enhanced meningeal lymphatic drainage of erythrocytes and improved outcomes in SAH. In summary, our research highlights the indispensable role of the meningeal lymphatic pathway in the clearance of blood and mediating consequences after SAH.
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Affiliation(s)
- Shi-Qiao Luo
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, People's Republic of China
| | - Sheng-Qing Gao
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, People's Republic of China
| | - Mao-Xing Fei
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, People's Republic of China
| | - Xue-Wang
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, People's Republic of China
| | - Yan-Sun
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, People's Republic of China
| | - Ran-Zhao
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, People's Republic of China
| | - Yan-Ling Han
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, People's Republic of China
| | - Han-Dong Wang
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, People's Republic of China; Department of Neurosurgery, Affiliated BenQ Hospital, Nanjing Medical University, Nanjing, People's Republic of China.
| | - Meng-Liang Zhou
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, People's Republic of China; Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, People's Republic of China.
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Gao SQ, Wang X, Li T, Gao CC, Han YL, Qiu JY, Miao SH, Sun Y, Zhao R, Zheng XB, Zhou ML. Astrocyte-derived hepcidin aggravates neuronal iron accumulation after subarachnoid hemorrhage by decreasing neuronal ferroportin1. Free Radic Biol Med 2024; 210:318-332. [PMID: 38052274 DOI: 10.1016/j.freeradbiomed.2023.11.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 11/27/2023] [Accepted: 11/28/2023] [Indexed: 12/07/2023]
Abstract
Iron accumulation is one of the most essential pathological events after subarachnoid hemorrhage (SAH). Ferroportin1 (FPN1) is the only transmembrane protein responsible for exporting iron. Hepcidin, as the major regulator of FPN1, is responsible for its degradation. Our study investigated how the interaction between FPN1 and hepcidin contributes to iron accumulation after SAH. We found that iron accumulation aggravated after SAH, along with decreased FPN1 in neurons and increased hepcidin in astrocytes. After knocking down hepcidin in astrocytes, the neuronal FPN1 significantly elevated, thus attenuating iron accumulation. After SAH, p-Smad1/5 and Smad4 tended to translocate into the nucleus. Moreover, Smad4 combined more fragments of the promoter region of Hamp after OxyHb stimulation. By knocking down Smad1/5 or Smad4 in astrocytes, FPN1 level restored and iron overload attenuated, leading to alleviated neuronal cell death and improved neurological function. However, the protective role disappeared after recombinant hepcidin administration. Therefore, our study suggests that owing to the nuclear translocation of transcription factors p-Smad1/5 and Smad4, astrocyte-derived hepcidin increased significantly after SAH, leading to a decreased level of neuronal FPN1, aggravation of iron accumulation, and worse neurological outcome.
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Affiliation(s)
- Sheng-Qing Gao
- Department of Neurosurgery, Nanjing Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Xue Wang
- Department of Neurosurgery, Nanjing Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Tao Li
- Department of Neurosurgery, Jinling Hospital, Jinling School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Chao-Chao Gao
- Department of Neurosurgery, Jinling Hospital, Jinling School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Yan-Ling Han
- Department of Neurosurgery, Nanjing Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Jia-Yin Qiu
- Department of Neurosurgery, Nanjing Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Shu-Hao Miao
- Department of Neurosurgery, Jinling Hospital, Jinling School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Yan Sun
- Department of Neurosurgery, Jinling Hospital, Jinling School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Ran Zhao
- Department of Neurosurgery, Nanjing Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Xiao-Bo Zheng
- Jinling Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing, China
| | - Meng-Liang Zhou
- Department of Neurosurgery, Nanjing Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China.
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Tang T, Liang H, Wei W, Han Y, Cao L, Cong Z, Luo S, Wang H, Zhou ML. Aloperine targets lysosomes to inhibit late autophagy and induces cell death through apoptosis and paraptosis in glioblastoma. Mol Biomed 2023; 4:42. [PMID: 37975957 PMCID: PMC10656413 DOI: 10.1186/s43556-023-00155-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Accepted: 11/06/2023] [Indexed: 11/19/2023] Open
Abstract
Glioblastoma (GBM) is an aggressive intracranial tumour, and current chemotherapy regimens have limited efficacy. Aloperine (ALO), a natural alkaline compound, has shown potential as an antitumor agent. However, the effect of ALO against GBM remains unclear. This study aimed to investigate the function of ALO in treating GBM. U87, A172, and GL261 cell lines were used for in vitro experiments, and GL261 was also used to establish in vivo models. The results showed that ALO inhibited the proliferation of GBM cells by cell cycle arrest and apoptosis. Furthermore, autophagy was found to play a critical role, suggested by observation of autophagosomes under the transmission electron microscopy. It was discovered for the first time that ALO targeted lysosomes directly in glioma cells, tested by fluo-rescence-labelled ALO and organelle-localizing probes. In addition, ALO inhibited late autophagy and induced paraptosis in GBM, verified by classical gene expression changes in qPCR and western blotting. Also, ALO inhibited tumour growth and acted synergistically with temozolomide in intracranial glioma mice models in vivo. Our findings suggest that ALO targets lysosomes to inhibit late autophagy in GBM, inducing cell cycle arrest, paraptosis, and apoptosis. ALO may therefore be a promising therapeutic agent for the treatment of GBM.
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Affiliation(s)
- Ting Tang
- Department of Neurosurgery, Xuanwu Hospital Capital Medical University, Beijing, P.R. China
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, P.R. China
| | - Hui Liang
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, P.R. China
- Department of Neurosurgery, The First Affiliated Hospital, Guangxi Medical University, Nanning, P.R. China
| | - Wuting Wei
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, P.R. China
| | - Yanling Han
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, P.R. China
| | - Liang Cao
- Department of Medical Oncology, Affiliated Chuzhou Hospital of Anhui Medical University, The First People's Hospital of Chuzhou, Chuzhou, P.R. China
| | - Zixiang Cong
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, P.R. China
| | - Shiqiao Luo
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, P.R. China
| | - Handong Wang
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, P.R. China.
- Department of Neurosurgery, Benq Medical Center, Nanjing Medical University, Nanjing, China.
| | - Meng-Liang Zhou
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, P.R. China.
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Luo SY, Zhou ML, Jian L, Wang DZ. [Primary mucinous cystadenocarcinoma of the breast with hormone receptor expression: report of a case]. Zhonghua Bing Li Xue Za Zhi 2023; 52:1055-1057. [PMID: 37805404 DOI: 10.3760/cma.j.cn112151-20230215-00130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 10/09/2023]
Affiliation(s)
- S Y Luo
- Department of Pathology, Taihe Hospital, Hubei University of Medicine, Shiyan 442000, China
| | - M L Zhou
- Department of Pathology, Taihe Hospital, Hubei University of Medicine, Shiyan 442000, China
| | - L Jian
- Department of Pathology, Taihe Hospital, Hubei University of Medicine, Shiyan 442000, China
| | - D Z Wang
- Department of Pathology, Taihe Hospital, Hubei University of Medicine, Shiyan 442000, China
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Zhou ML, Zhang L, Li TS, Liu ZY. [Advances in the diagnosis and treatment of invasive fungal disease in HIV-infected patients]. Zhonghua Nei Ke Za Zhi 2023; 62:1148-1154. [PMID: 37650191 DOI: 10.3760/cma.j.cn112138-20221008-00737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Affiliation(s)
- M L Zhou
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences,Beijing 100730,China State Key Laboratory of Difficult and Severe Diseases and Rare Diseases,Peking Union Medical College Hospital,Beijing 100730,China
| | - L Zhang
- State Key Laboratory of Difficult and Severe Diseases and Rare Diseases,Peking Union Medical College Hospital,Beijing 100730,China Department of Infectious Diseases,Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - T S Li
- State Key Laboratory of Difficult and Severe Diseases and Rare Diseases,Peking Union Medical College Hospital,Beijing 100730,China Department of Infectious Diseases,Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Z Y Liu
- State Key Laboratory of Difficult and Severe Diseases and Rare Diseases,Peking Union Medical College Hospital,Beijing 100730,China Department of Infectious Diseases,Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
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Dou JR, Zhou X, Pan XY, Miao RF, Zhou ML, Zhang F. [Investigation on health status of workers exposed to glyphosate]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2023; 41:517-522. [PMID: 37524675 DOI: 10.3760/cma.j.cn121094-20220329-00162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
Objective: To analyze the concentrations of glyphosate and its metabolites in occupational exposed workers and their possible effects on human health, so as to provide a reference for improving the safe use of glyphosate and toxicity research. Methods: From April to December 2020, 247 workers directly exposed to glyphosate in 5 enterprises were selected as the contact group, and 237 workers who were not exposed to glyphosate and other pesticides in the same enterprise were selected as the control group. Questionnaire survey and occupational health examination were conducted on objects, and the concentrations of glyphosate and its metabolites in the air of workplaces and biological samples were detected. The correlation between the concentrations and the difference of health examination between the two groups were analyzed. Results: The urine glyphosate concentration (0.022-47.668 mg/L), the rate of exceeding the standard (60.32%, 149/247) and the urine aminomethyl phosphonic acid concentration (<0.010-1.624 mg/L) in the contact group were higher than those in the control group [urine glyphosate concentration (<0.020-4.482 mg/L), the rate of exceeding the standard (2.53%, 6/237) and the urine aminomethyl phosphonic acid concentration (<0.010-0.524 mg/L) ], respectively (P<0.001). The exceeding standard rate of glyphosate concentration in the workplace was 33.67% (33/98). The concentration of glyphosate in the workplace was positively correlated with the concentrations of glyphosate and aminomethylphosphonic acid in urine (r(s)=0.804, 0.238, P<0.001), and the concentration of glyphosate in urine was positively correlated with the concentration of aminomethylphosphonic acid in urine (r(s)=0.549, P<0.001). The alanine aminotransferase (ALT), white cell ratio, creatinine, uric acid, the abnormal rates of ALT and total protein (TP) in the contact group were higher than those in the control group, and TP was lower than that in the control group, the differences were statistically different (P<0.05). The abnormal rates of overall liver function, overall renal function, blood routine test, urine routine test, electrocardiogram, liver B ultrasound and blood lipid in the contact group were significantly higher than those in the control group (P<0.05) . Conclusion: The concentration of glyphosate in the workplace is related to the concentrations of glyphosate and aminomethyl phosphonic acid in the urine of workers, and exposure to glyphosate may have some harmful effects on human health.
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Affiliation(s)
- J R Dou
- Occupational Health Department of Yangzhou Center for Disease Control and Prevention, Yangzhou 225001, China
| | - X Zhou
- Occupational Health Department of Yangzhou Center for Disease Control and Prevention, Yangzhou 225001, China
| | - X Y Pan
- Occupational Health Department of Yangzhou Center for Disease Control and Prevention, Yangzhou 225001, China
| | - R F Miao
- Emergency Department of Affiliated Hospital of Yangzhou University, Yangzhou 225009, China
| | - M L Zhou
- School of Medicine, Yangzhou Vocational University, Yangzhou 225009, China
| | - F Zhang
- Institute of Occupational Diseases, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
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Miao SH, Gao SQ, Li HX, Zhuang YS, Wang X, Li T, Gao CC, Han YL, Qiu JY, Zhou ML. Increased NOX2 expression in astrocytes leads to eNOS uncoupling through dihydrofolate reductase in endothelial cells after subarachnoid hemorrhage. Front Mol Neurosci 2023; 16:1121944. [PMID: 37063365 PMCID: PMC10097896 DOI: 10.3389/fnmol.2023.1121944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 03/13/2023] [Indexed: 04/03/2023] Open
Abstract
IntroductionEndothelial nitric oxide synthase (eNOS) uncoupling plays a significant role in acute vasoconstriction during early brain injury (EBI) after subarachnoid hemorrhage (SAH). Astrocytes in the neurovascular unit extend their foot processes around endothelia. In our study, we tested the hypothesis that increased nicotinamide adenine dinucleotide phosphate oxidase 2 (NOX2) expression in astrocytes after SAH leads to eNOS uncoupling.MethodsWe utilized laser speckle contrast imaging for monitoring cortical blood flow changes in mice, nitric oxide (NO) kits to measure the level of NO, and a co-culture system to study the effect of astrocytes on endothelial cells. Moreover, the protein levels were assessed by Western blot and immunofluorescence staining. We used CCK-8 to measure the viability of astrocytes and endothelial cells, and we used the H2O2 kit to measure the H2O2 released from astrocytes. We used GSK2795039 as an inhibitor of NOX2, whereas lentivirus and adeno-associated virus were used for dihydrofolate reductase (DHFR) knockdown in vivo and in vitro.ResultsThe expression of NOX2 and the release of H2O2 in astrocytes are increased, which was accompanied by a decrease in endothelial DHFR 12 h after SAH. Moreover, the eNOS monomer/dimer ratio increased, leading to a decrease in NO and acute cerebral ischemia. All of the above were significantly alleviated after the administration of GSK2795039. However, after knocking down DHFR both in vivo and in vitro, the protective effect of GSK2795039 was greatly reversed.DiscussionThe increased level of NOX2 in astrocytes contributes to decreased DHFR in endothelial cells, thus aggravating eNOS uncoupling, which is an essential mechanism underlying acute vasoconstriction after SAH.
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Affiliation(s)
- Shu-Hao Miao
- Department of Neurosurgery, Jinling Hospital, Jinling School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Sheng-Qing Gao
- Department of Neurosurgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Hui-Xin Li
- Department of Gynecology, Women’s Hospital of Nanjing Medical University, Nanjing, China
| | - Yun-Song Zhuang
- Department of Neurosurgery, Jinling Hospital, Jinling School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Xue Wang
- Department of Neurosurgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Tao Li
- Department of Neurosurgery, Jinling Hospital, Jinling School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Chao-Chao Gao
- Department of Neurosurgery, Jinling Hospital, Jinling School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Yan-Ling Han
- Department of Neurosurgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Jia-Yin Qiu
- Department of Neurosurgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Meng-Liang Zhou
- Department of Neurosurgery, Jinling Hospital, Jinling School of Clinical Medicine, Nanjing Medical University, Nanjing, China
- *Correspondence: Meng-Liang Zhou,
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Zhuang YS, Wang X, Gao SQ, Miao SH, Li T, Gao CC, Han YL, Qiu JY, Zhou ML, Wang HD. Neuroprotective mechanisms of OXCT1 via the SIRT3-SOD2 pathway after traumatic brain injury. Brain Res 2023; 1808:148324. [PMID: 36921750 DOI: 10.1016/j.brainres.2023.148324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 03/01/2023] [Accepted: 03/09/2023] [Indexed: 03/14/2023]
Abstract
BACKGROUND Ketones are not only utilized to produce energy but also play a neuroprotective role in many neurodegenerative diseases. However, whether this process has an impact on secondary brain damage after traumatic brain injury (TBI) remains unknown. OXCT1 (3-Oxoacid CoA-Transferase 1) is the rate-limiting enzyme in the intra-neuronal utilization of ketones. In this study, we investigated whether reduced expression of OXCT1 after TBI could impact neuroprotective mechanisms and exacerbate neurological dysfunction. MATERIALS AND METHODS Experimental TBI was induced by a modified version of the weight drop model, it is a model of severe head trauma. Expression of OXCT1 in the injured hippocampus of mice was measured at different time points using immunoblotting assays. The release of abnormal mitochondrial cytochrome c from neurons of the mouse injured lateral hippocampus was measured 1 week after TBI using immunoblotting assays. Neuronal death was assessed by Nissl staining and the level of reactive oxygen species (ROS) within the neurons of the injured lateral hippocampus was assessed by Dihydroethidium staining. Results OXCT1 was overexpressed in hippocampal neurons by injection of adeno-associated virus into the lateral ventricle. OXCT1 expression levels decreased significantly 1 week post-TBI. After comparing the data obtained from different groups of mice, OXCT1 was found to significantly increase the expression of SIRT3 and reduce the proportion of acetylated SOD2, thus decreasing the production of ROS in the injured hippocampal neurons, reducing neuronal death, and improving cognitive function. Conclusions OXCT1 has a critical previously unappreciated protective role in neurological impairment following TBI via the SIR3-SOD2 pathway. These findings highlight the potential of OXCT1 as a simple treatment for patients with TBI.
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Affiliation(s)
- Yun-Song Zhuang
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, People's Republic of China
| | - Xue Wang
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, People's Republic of China
| | - Sheng-Qing Gao
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, People's Republic of China
| | - Shu-Hao Miao
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, People's Republic of China
| | - Tao Li
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, People's Republic of China
| | - Chao-Chao Gao
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, People's Republic of China
| | - Yan-Ling Han
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, People's Republic of China
| | - Jia-Yin Qiu
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, People's Republic of China
| | - Meng-Liang Zhou
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, People's Republic of China.
| | - Han-Dong Wang
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, People's Republic of China; Department of Neurosurgery, Benq Medical Center, Nanjing Medical University, People's Republic of China.
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11
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Wang X, Deng HJ, Gao SQ, Li T, Gao CC, Han YL, Zhuang YS, Qiu JY, Miao SH, Zhou ML. Dobutamine promotes the clearance of erythrocytes from the brain to cervical lymph nodes after subarachnoid hemorrhage in mice. Front Pharmacol 2023; 13:1061457. [PMID: 36703738 PMCID: PMC9871238 DOI: 10.3389/fphar.2022.1061457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 12/22/2022] [Indexed: 01/11/2023] Open
Abstract
Background: Erythrocytes and their breakdown products in the subarachnoid space (SAS) are the main contributors to the pathogenesis of subarachnoid hemorrhage (SAH). Dobutamine is a potent β1-adrenoreceptor agonist that can increase cardiac output, thus improving blood perfusion and arterial pulsation in the brain. In this study, we investigated whether the administration of dobutamine promoted the clearance of red blood cells (RBCs) and their degraded products via meningeal lymphatic vessels (mLVs), thus alleviating neurological deficits in the early stage post-SAH. Materials and methods: Experimental SAH was induced by injecting autologous arterial blood into the prechiasmatic cistern in male C57BL/6 mice. Evans blue was injected into the cisterna magna, and dobutamine was administered by inserting a femoral venous catheter. RBCs in the deep cervical lymphatic nodes (dCLNs) were evaluated by hematoxylin-eosin staining, and the hemoglobin content in dCLNs was detected by Drabkin's reagent. The accumulation of RBCs in the dura mater was examined by immunofluorescence staining, neuronal death was evaluated by Nissl staining, and apoptotic cell death was evaluated by TUNEL staining. The Morris water maze test was used to examine the cognitive function of mice after SAH. Results: RBCs appeared in dCLNs as early as 3 h post-SAH, and the hemoglobin in dCLNs peaked at 12 h after SAH. Dobutamine significantly promoted cerebrospinal fluid (CSF) drainage from the SAS to dCLNs and obviously reduced the RBC residue in mLVs, leading to a decrease in neuronal death and an improvement in cognitive function after SAH. Conclusion: Dobutamine administration significantly promoted RBC drainage from cerebrospinal fluid in the SAS via mLVs into dCLNs, ultimately relieving neuronal death and improving cognitive function.
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Affiliation(s)
- Xue Wang
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Hong-Ji Deng
- Department of Neurosurgery, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Sheng-Qing Gao
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Tao Li
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, China
| | - Chao-Chao Gao
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, China
| | - Yan-Ling Han
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Yun-Song Zhuang
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, China
| | - Jia-Yin Qiu
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Shu-Hao Miao
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Meng-Liang Zhou
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, China,*Correspondence: Meng-Liang Zhou,
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12
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Gao SQ, Shi JJ, Xue-Wang, Miao SH, Li T, Gao CC, Han YL, Qiu JY, Zhuang YS, Zhou ML. Endothelial NOX4 aggravates eNOS uncoupling by decreasing dihydrofolate reductase after subarachnoid hemorrhage. Free Radic Biol Med 2022; 193:499-510. [PMID: 36336227 DOI: 10.1016/j.freeradbiomed.2022.10.318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 10/14/2022] [Accepted: 10/29/2022] [Indexed: 11/06/2022]
Abstract
Endothelial malfunction is a major contributor to early or delayed vasospasm after subarachnoid hemorrhage (SAH). As a representative form of endothelial dysfunction, endothelial nitric oxide synthase (eNOS) uncoupling leads to a reduction in nitric oxide (NO) generated by endothelial cells. In this study, we investigated how the interaction between endothelial NOX4 (nicotinamide adenine dinucleotide phosphate oxidase 4) and DHFR (dihydrofolate reductase) contributes to eNOS uncoupling after SAH. Setanaxib and the adeno-associated virus (AAV) targeting brain vascular endothelia were injected through the tail vein and the expression and localization of proteins were examined by western blot and immunofluorescence staining. The NO content was measured using the NO assay kit, and laser speckle contrast imaging was used to assess cortical perfusion. ROS (reactive oxygen species) level was detected by DHE (dihydroethidium) staining, DCFH-DA (2',7'-dichlorofluorescin diacetate) staining and H2O2 (hydrogen peroxide) measurement. The Garcia score was employed to examine neurological function. Setanaxib is widely used for its preferential inhibition for NOX1/4 over other NOX isoforms. After endothelial NOX4 was inhibited by Setanaxib in a mouse model of SAH, the endothelial DHFR level was significantly elevated, which attenuated eNOS uncoupling, increased cortical perfusion, and improved the neurological function. The protective role of inhibiting endothelial NOX4, however, disappeared after knocking down endothelial DHFR. Our results suggest that endothelial DHFR decreased significantly because of the elevated level of endothelial NOX4, which aggravated eNOS uncoupling after SAH, leading to decreased cortical perfusion and worse neurological outcome.
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Affiliation(s)
- Sheng-Qing Gao
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, People's Republic of China
| | - Jia-Jun Shi
- Department of General Surgery, Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing, People's Republic of China
| | - Xue-Wang
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, People's Republic of China
| | - Shu-Hao Miao
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, People's Republic of China
| | - Tao Li
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, People's Republic of China
| | - Chao-Chao Gao
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, People's Republic of China
| | - Yan-Ling Han
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, People's Republic of China
| | - Jia-Yin Qiu
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, People's Republic of China
| | - Yun-Song Zhuang
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, People's Republic of China
| | - Meng-Liang Zhou
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, People's Republic of China.
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13
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Zhang XS, Wu Q, Wu LY, Ye ZN, Jiang TW, Li W, Zhuang Z, Zhou ML, Zhang X, Hang CH. Correction: Sirtuin 1 activation protects against early brain injury after experimental subarachnoid hemorrhage in rats. Cell Death Dis 2022; 13:964. [PMCID: PMC9671883 DOI: 10.1038/s41419-022-05427-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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14
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Liang H, Tang T, Huang H, Li T, Gao C, Han Y, Yuan B, Gao S, Wang H, Zhou ML. Peroxisome proliferator-activated receptor-γ ameliorates neuronal ferroptosis after traumatic brain injury in mice by inhibiting cyclooxygenase-2. Exp Neurol 2022; 354:114100. [PMID: 35490721 DOI: 10.1016/j.expneurol.2022.114100] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Revised: 03/20/2022] [Accepted: 04/24/2022] [Indexed: 01/08/2023]
Abstract
Among the multiple kinds of neuronal cell death triggered by traumatic brain injury (TBI), ferroptosis, an iron-dependent lipid peroxidative regulatory cell death, has a critical role. Peroxisome proliferator-activated receptor-γ (PPARγ) is a nuclear transcription factor that regulates lipid metabolism and suppresses neuronal inflammation. However, the role of PPARγ in neuronal ferroptosis induced by TBI remains unclear. Here, we investigated the regulatory effect of PPARγ on neuronal ferroptosis in a weight-drop TBI model in vivo and an RAS-selective lethal 3 (RSL3)-activated ferroptotic neuronal model in vitro. PPARγ was mainly localized in the nucleus of neurons and was decreased in both the in vivo TBI model and the in vitro ferroptotic neuronal model. The addition of a specific agonist, pioglitazone, activated PPARγ, which protected neuronal function post-TBI in vivo and increased the viability of ferroptotic neurons in vitro. Further investigation suggested that PPARγ probably attenuates neuronal ferroptosis by downregulating cyclooxygenase-2 (COX2) protein expression levels in vivo and in vitro. This study revealed the relationship among PPARγ, ferroptosis and TBI and identified a potential target for comprehensive TBI treatment.
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Affiliation(s)
- Hui Liang
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, PR China
| | - Ting Tang
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, PR China
| | - Hanyu Huang
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, PR China
| | - Tao Li
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, PR China
| | - Chaochao Gao
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, PR China
| | - Yanling Han
- Department of Neurosurgery, Jinling Hospital, Nanjing, PR China
| | - Bin Yuan
- Department of Neurosurgery, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, PR China
| | - Shengqing Gao
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, PR China
| | - Handong Wang
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, PR China.
| | - Meng-Liang Zhou
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, PR China.
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15
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Yang XJ, Ling SZ, Zhou ML, Deng HJ, Qi M, Liu XL, Zhen C, Chen YX, Fan XR, Wu ZY, Ma FC, Rong J, Di GF, Jiang XC. Inhibition of TRPA1 attenuates oxidative stress-induced damage after traumatic brain injury via the ERK/AKT signaling pathway. Neuroscience 2022; 494:51-68. [DOI: 10.1016/j.neuroscience.2022.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 01/25/2022] [Accepted: 02/04/2022] [Indexed: 10/19/2022]
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16
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Li T, Huang HY, Wang H, Gao CC, Liang H, Deng CL, Zhao X, Han YL, Zhou ML. Restoration of Brain Angiotensin-Converting Enzyme 2 Alleviates Neurological Deficits after Severe Traumatic Brain Injury via Mitigation of Pyroptosis and Apoptosis. J Neurotrauma 2021; 39:423-434. [PMID: 34861788 DOI: 10.1089/neu.2021.0382] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Clinically, the renin-angiotensin-aldosterone system is intensely activated in moderate to severe traumatic brain injury (TBI) patients. Increased angiotensin II in circulatory blood after TBI can enter the brain through the disrupted blood-brain barrier. Angiotensin-converting enzyme 2 (ACE2) is an enzyme that metabolizes angiotensin II into angiotensin (1-7), which has been shown to have neuroprotective results. However, the expression and role of ACE2 in the brain after TBI remains elusive. We found that ACE2 protein abundance was downregulated around the contusional area in the brains of both humans and mice. Endogenous ACE2 was expressed in neurons, astrocytes, and microglia in the cortex of the mouse brain. Administration of recombinant human ACE2 intracerebroventricularly alleviated neurological defects after TBI in mice. Treatment of recombinant human ACE2 suppressed TBI-induced increase of angiotensin II and the decrease of angiotensin (1-7) in the brain, mitigated neural cell death, reduced the activation of NLRP3 and Caspase3, decreased phosphorylation of mitogen-activated protein kinases, and nuclear factor kappa B, and reduced inflammatory cytokines TNF-α and IL-1β. Administration of ACE2 enzyme activator diminazene aceturate intraperitoneally rescued downregulation of ACE2 enzymatic activity and protein abundance in the brain. Diminazene aceturate treatment once per day in the acute stage after TBI alleviated long-term cognitive defects and neuronal loss in mice. Collectively, these results indicated that restoration of ACE2 alleviated neurological deficits after TBI by mitigation of pyroptosis and apoptosis.
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Affiliation(s)
- Tao Li
- Nanjing Medical University, 12461, Department of Neurosurgery, Jinling Hospital, Jinling School of Clinical Medicine,, Nanjing, Jiangsu, China;
| | - Han-Yu Huang
- Nanjing Medical University, 12461, Department of Neurosurgery, Jinling Hospital, Jinling School of Clinical Medicine,, Nanjing, Jiangsu, China;
| | - Handong Wang
- Nanjing Medical University, 12461, neurosurgery of jinling hospital, Nanjing, Jiangsu, China;
| | - Chao-Chao Gao
- Nanjing Medical University, 12461, Department of Neurosurgery, Jinling Hospital, Jinling School of Clinical Medicine,, Nanjing, Jiangsu, China;
| | - Hui Liang
- Nanjing University, 12581, Department of Neurosurgery, Jinling Hospital, Nanjing, Jiangsu, China;
| | - Chu-Lei Deng
- Nanjing Jinling Hospital, 144990, Department of Neurosurgery, Nanjing, Jiangsu, China;
| | - Xin Zhao
- Nanjing University, 12581, Department of Neurosurgery, Jinling Hospital, Nanjing, Jiangsu, China;
| | - Yan-Lin Han
- Nanjing University, 12581, Department of Neurosurgery, Jinling Hospital, Nanjing, Jiangsu, China;
| | - Meng-Liang Zhou
- Nanjing University, 12581, Department of Neurosurgery, Jinling Hospital, Nanjing, Jiangsu, China;
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17
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Dou JR, Zhou X, Miao RF, Yang Y, Liu X, Zhang F, Zhao Y, Zhou ML. [Analysis of clinical characteristics and prognostic factors in 40 cases of acute glyphosate poisoning]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2021; 39:676-681. [PMID: 34624951 DOI: 10.3760/cma.j.cn121094-20201030-00601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the clinical characteristics and prognostic factors of patients with acute glyphosate poisoning, and to provide reference for the comprehensive treatment and prognosis judgment of acute glyphosate poisoning. Methods: The complete hospitalized medical records data of 40 patients with acute glyphosate poisoning who were treated in the emergency department of Affiliated Hospital of Yangzhou University from 2014 to 2019 were collected in August 2020. According to the outcome during the follow-up period of 90 d after discharge from hospital, patients were divided into survival group (n=33) and treatment failure group (n=7) . The clinical characteristics of the two groups were analyzed. The influencing factors of prognosis were analyzed by binary logistic regression, and the receiver operating characteristic (ROC) curve was used to evaluate the value of white blood cell count level at admission to the prognosis of patients with acute glyphosate poisoning. Results: The average age of the 40 glyphosate poisoning patients was (57.70±19.72) years old, the oral dose was 100 (50, 200) ml, the hospital stay was 4.0 (1.0, 5.0) d, and the fatality rate was 17.5% (7/40) . The main clinical manifestations were the symptoms of the digestive tract, respiratory tract, cardiovascular system and nervous system. Logistic regression showed that white blood cell level at admission was an influencing factor for the prognosis of patients with acute glyphosate poisoning (OR=1.148, 95%CI: 1.124-1.791, P=0.003) . The ROC curve showed that the best diagnostic cut-off value of white blood cell level at admission to the prognosis of acute glyphosate poisoning was 14.65×10(9)/L, the area under the curve (AUC) was 0.9351. The sensitivity was 100.00%, and the specificity was 84.85%. Conclusion: High level of white blood cell at admission is a risk factor for the prognosis of acute glyphosate poisoning, and white blood cell level at admission has a certain predictive value for the prognosis of acute glyphosate poisoning.
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Affiliation(s)
- J R Dou
- Yangzhou Center for Disease Control and Prevention, Yangzhou 225001, China
| | - X Zhou
- Yangzhou Center for Disease Control and Prevention, Yangzhou 225001, China
| | - R F Miao
- Affiliated Hospital of Yangzhou University, Yangzhou 225009, China
| | - Y Yang
- Yangzhou Su Bei Hospital, Yangzhou 225001, China
| | - X Liu
- Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - F Zhang
- Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - Y Zhao
- Affiliated Hospital of Yangzhou University, Yangzhou 225009, China
| | - M L Zhou
- Yangzhou Institute of Technology, Yangzhou 225009, China
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18
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Deng HJ, Deji Q, Zhaba W, Liu JQ, Gao SQ, Han YL, Zhou ML, Wang CX. A20 Establishes Negative Feedback With TRAF6/NF-κB and Attenuates Early Brain Injury After Experimental Subarachnoid Hemorrhage. Front Immunol 2021; 12:623256. [PMID: 34381441 PMCID: PMC8350325 DOI: 10.3389/fimmu.2021.623256] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Accepted: 04/09/2021] [Indexed: 11/13/2022] Open
Abstract
Nuclear factor (NF)-κB-ty -50mediated neuroinflammation plays a crucial role in early brain injury (EBI) after subarachnoid hemorrhage (SAH). As an important negative feedback regulator of NF-κB, A20 is essential for inflammatory homeostasis. Herein, we tested the hypothesis that A20 attenuates EBI by establishing NF-κB-associated negative feedback after experimental SAH. In vivo and in vitro models of SAH were established. TPCA-1 and lentivirus were used for NF-κB inhibition and A20 silencing/overexpression, respectively. Cellular localization of A20 in the brain was determined via immunofluorescence. Western blotting and enzyme-linked immunosorbent assays were applied to observe the expression of members of the A20/tumor necrosis factor receptor-associated factor 6 (TRAF6)/NF-κB pathway and inflammatory cytokines (IL-6, IL-1β, TNF-α). Evans blue staining, TUNEL staining, Nissl staining, brain water content, and modified Garcia score were performed to evaluate the neuroprotective effect of A20. A20 expression by astrocytes, microglia, and neurons was increased at 24 h after SAH. A20 and inflammatory cytokine levels were decreased while TRAF6 expression was elevated after NF-κB inhibition. TRAF6, NF-κB, and inflammatory cytokine levels were increased after A20 silencing but suppressed with A20 overexpression. Also, Bcl-2, Bax, MMP-9, ZO-1 protein levels; Evans blue, TUNEL, and Nissl staining; brain water content; and modified Garcia score showed that A20 exerted a neuroprotective effect after SAH. A20 expression was regulated by NF-κB. In turn, increased A20 expression inhibited TRAF6 and NF-κB to reduce the subsequent inflammatory response. Our data also suggest that negative feedback regulation mechanism of the A20/TRAF6/NF-κB pathway and the neuroprotective role of A20 to attenuate EBI after SAH.
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Affiliation(s)
- Hong-Ji Deng
- Department of Neurosurgery, The First Affiliated Hospital, Guangxi Medical University, Nanning, China
| | - QuZhen Deji
- Department of Ophthalmology, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - WangDui Zhaba
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Jia-Qiang Liu
- Department of Neurosurgery, Yijishan Hospital, Wannan Medical College, Wuhu, China
| | - Sheng-Qing Gao
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Yan-Ling Han
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Meng-Liang Zhou
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Chun-Xi Wang
- Department of Neurosurgery, The First Affiliated Hospital, Guangxi Medical University, Nanning, China
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Liu XL, Gao CC, Qi M, Han YL, Zhou ML, Zheng LR. Expression of FOXO transcription factors in the brain following traumatic brain injury. Neurosci Lett 2021; 753:135882. [PMID: 33838260 DOI: 10.1016/j.neulet.2021.135882] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 04/02/2021] [Accepted: 04/02/2021] [Indexed: 01/08/2023]
Abstract
Traumatic brain injury (TBI) is a substantial clinical and social problem worldwide, causing high morbidity and mortality along with significant economic and medical costs. Forkhead box O transcription factors (FOXOs) have been found to play a critical role in the regulation of cell functions, such as nutrient metabolism, programmed cell death, and tumor suppression. In the central nervous system, FOXOs are reported to be pivotal regulators of learning and memory, neurite outgrowth, and axonal degeneration. However, the role of FOXOs in TBI is still unknown. Here, we investigate changes in the expression of FOXOs in the acute stage following TBI. First, we evaluated the expression of FOXO proteins in the brains of humans after TBI. A TBI model was then established in mice, and the ipsilateral cerebral cortex was collected at 3 h, 6 h, 9 h, 12 h, 24 h, and 72 h post-TBI. The dynamic expression of Foxo proteins was observed. Neuron-specific localization of Foxos was detected by double immunofluorescence staining. Following TBI, FOXO proteins in the brains of humans were significantly increased. In mice, Foxo protein levels generally peaked at 24 h. By examining co-localization with neurons, the proportion of Foxo(+) neurons was found to increase following TBI and peak at 24 h. This study reveals the time-dependent and neuron-specific expression of Foxos following TBI in mice, providing insight to enhance understanding of the role of Foxos in TBI.
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Affiliation(s)
- Xi-Lin Liu
- Graduate School of Wannan Medical College, Wuhu, 241002, Anhui, China; Department of Pathology, School of Basic Medical Sciences, Wannan Medical College, Wuhu, 241002, Anhui, China
| | - Chao-Chao Gao
- Department of Neurosurgery, Jinling Hospital, Nanjing Medical University, Nanjing, 210002, Jiangsu, China
| | - Min Qi
- Department of Neurosurgery, Yijishan Hospital, Wannan Medical College, Wuhu, 241001, Anhui, China
| | - Yan-Ling Han
- Department of Neurosurgery, Jinling Hospital, Nanjing Medical University, Nanjing, 210002, Jiangsu, China; Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, 210002, Jiangsu, China
| | - Meng-Liang Zhou
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, 210002, Jiangsu, China.
| | - Lan-Rong Zheng
- Graduate School of Wannan Medical College, Wuhu, 241002, Anhui, China; Department of Pathology, School of Basic Medical Sciences, Wannan Medical College, Wuhu, 241002, Anhui, China.
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20
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Cheng H, Di G, Gao CC, He G, Wang X, Han YL, Sun LA, Zhou ML, Jiang X. FTY720 Reduces Endothelial Cell Apoptosis and Remodels Neurovascular Unit after Experimental Traumatic Brain Injury. Int J Med Sci 2021; 18:304-313. [PMID: 33390799 PMCID: PMC7757143 DOI: 10.7150/ijms.49066] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 11/05/2020] [Indexed: 12/21/2022] Open
Abstract
Traumatic brain injury (TBI) is a major cause of death and disability worldwide. A sequence of pathological processes occurred when there is TBI. Previous studies showed that sphingosine-1-phosphate receptor 1 (S1PR1) played a critical role in inflammatory response in the brain after TBI. Thus, the present study was designed to evaluate the effects of the S1PR1 modulator FTY720 on neurovascular unit (NVU) after experimental TBI in mice. The weight-drop TBI method was used to induce TBI. Western blot (WB) was performed to determine the levels of SIPR1, claudin-5 and occludin at different time points. FTY720 was intraperitoneally administered to mice after TBI was induced. The terminal deoxynucleotidyl transferase-dUTP nick end labeling (TUNEL) assay was used to assess endothelial cell apoptosis. Immunofluorescence and WB were performed to measure the expression of tight junction proteins: claudin-5 and occludin. Evans blue (EB) permeability assay and brain water content were applied to evaluate the blood-brain barrier (BBB) permeability and brain edema. Immunohistochemistry was performed to assess the activation of astrocytes and microglia. The results showed that FTY720 administration reduced endothelial cell apoptosis and improved BBB permeability. FTY720 also attenuated astrocytes and microglia activation. Furthermore, treatment with FTY720 not only improved neurological function, but also increased the survival rate of mice significantly. These findings suggest that FTY720 administration restored the structure of the NVU after experimental TBI by decreasing endothelial cell apoptosis and attenuating the activation of astrocytes. Moreover, FTY720 might reduce inflammation in the brain by reducing the activation of microglia in TBI mice.
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Affiliation(s)
- Hao Cheng
- Department of Neurosurgery, Yijishan Hospital, Wannan Medical College, Anhui, China
| | - Guangfu Di
- Department of Neurosurgery, Yijishan Hospital, Wannan Medical College, Anhui, China
| | - Chao-Chao Gao
- Department of Neurosurgery, Jinling Hospital, Jinling School of Clinical Medicine, Nanjing Medical University, Jiangsu, China
| | - Guoyuan He
- Department of Neurosurgery, Yijishan Hospital, Wannan Medical College, Anhui, China
| | - Xue Wang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Jiangsu, China
| | - Yan-Ling Han
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Jiangsu, China
| | - Le-An Sun
- Department of Neurosurgery, Yijishan Hospital, Wannan Medical College, Anhui, China
| | - Meng-Liang Zhou
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Jiangsu, China
| | - Xiaochun Jiang
- Department of Neurosurgery, Yijishan Hospital, Wannan Medical College, Anhui, China
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Zhaba WD, Deji QZ, Deng HJ, Han YL, Gao SQ, Liu XL, Zhou ML. Retinal hypoxia after experimental subarachnoid hemorrhage. Neurosci Lett 2020; 742:135554. [PMID: 33352284 DOI: 10.1016/j.neulet.2020.135554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 11/17/2020] [Accepted: 12/02/2020] [Indexed: 10/22/2022]
Abstract
BACKGROUND AND PURPOSE The patients who survive subarachnoid hemorrhage (SAH) often have long-term neurological complications. There are no reports about the pathological change of retina after SAH. METHODS An experimental model of SAH was established by injecting autologous blood into the prechiasmatic cistern of Sprague-Dawley rats. Hematoxylin and eosin (HE) staining was performed to show the alternation of morphology in retina after SAH. To detect the retinal new vessels (NVs), CD31 was labelled by immunofluorescence and immunohistochemistry. The time-course expressions of vascular endothelial growth factor (VEGF)-A and hypoxia-inducible factor-1α (HIF-1 α) was also revealed by Western blot analysis. RESULTS A clear reduction of retinal ganglion cells (RGCs) was noticed after SAH. The immunofluorescence and immunohistochemical staining of CD31 reveals a large number of NVs in RGC layer after SAH compared with the normal controls. The level of VEGF-A in the retina after SAH was increased and peaked at 12h and 14 d. The expression of HIF-1α in the retina increased as early as 3 h after SAH, reached a peak at 12 h after SAH. CONCLUSIONS The results showed that SAH induced the retina hypoxia resulting in the reduction of RGCs, increase of NVs and activation of NVs related HIF-1α/VEGF-A pathway.
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Affiliation(s)
- Wang-Dui Zhaba
- Department of Neurosurgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Qu-Zhen Deji
- Department of Ophthalmology, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Hong-Ji Deng
- Department of Neurosurgery, The First Affiliated Hospital, Guangxi Medical University, Nanning, Guangxi, China
| | - Yan-Ling Han
- Department of Neurosurgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Sheng-Qing Gao
- Department of Neurosurgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Xi-Lin Liu
- Graduate School of Wannan Medical College, Wuhu, Anhui, China
| | - Meng-Liang Zhou
- Department of Neurosurgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, China.
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Deng HJ, Zhou CH, Huang LT, Wen LB, Zhou ML, Wang CX. Activation of silent information regulator 1 exerts a neuroprotective effect after intracerebral hemorrhage by deacetylating NF-κB/p65. J Neurochem 2020; 157:574-585. [PMID: 33289070 DOI: 10.1111/jnc.15258] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 11/22/2020] [Accepted: 11/24/2020] [Indexed: 12/27/2022]
Abstract
Nuclear factor (NF)-κB-mediated neuroinflammation is an important mechanism of intracerebral hemorrhage (ICH)-induced neurotoxicity. Silent information regulator 1 (SIRT1) plays a multi-protective effect in a variety of diseases by deacetylating and inhibiting NF-κB/p65. However, the role of SIRT1 in brain damage following ICH remains unclear. We hypothesized that SIRT1 can protect against ICH-induced brain damage by inhibiting neuroinflammation through deacetylating NF-κB/p65. The ICH model was induced in vivo (with collagenase) and in vitro (with hemoglobin). Resveratrol and Ex527 were administered to activate or inhibit SIRT1, respectively. Western blot, immunohistochemistry, and immunofluorescence assays were performed to detect the expression of SIRT1 and p65. Enzyme-linked immunosorbent assays (ELISAs) were used to explore tumor necrosis factor (TNF)-α and interleukin (IL)-1β release. The neurological score, brain water content, terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) staining, and brain hemoglobin content were determined to evaluate the neuroprotective effect of SIRT1. SIRT1 expression was decreased, whereas the level of acetylated p65 (Ac-p65) was elevated after ICH in vivo. Moreover, hemoglobin treatment decreased the expression of SIRT1 in vitro. Activation of SIRT1 by resveratrol had a neuroprotective effect, along with decreased levels of Ac-p65, IL-1β, TNF-α, and apoptosis after ICH. The effect of resveratrol was abolished by the SIRT1 inhibitor Ex527. Our results are consistent with the hypothesis that SIRT1 exerts a neuroprotective effect after ICH by deacetylating p65 to inhibit the NF-κB-dependent inflammatory response.
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Affiliation(s)
- Hong-Ji Deng
- Department of Neurosurgery, the First Affiliated Hospital, Guangxi Medical University, Nanning, China
| | - Chen-Hui Zhou
- Department of Neurosurgery, Ningbo First Hospital, Ningbo University School of Medicine, Ningbo, China
| | - Li-Tian Huang
- Department of Neurosurgery, the First Affiliated Hospital, Guangxi Medical University, Nanning, China
| | - Liang-Bao Wen
- Department of Neurosurgery, the First Affiliated Hospital, Guangxi Medical University, Nanning, China
| | - Meng-Liang Zhou
- Department of Neurosurgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Chun-Xi Wang
- Department of Neurosurgery, the First Affiliated Hospital, Guangxi Medical University, Nanning, China
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Tang XB, Hao YH, Yao L, Li D, Yuan LL, Shen X, Wang DZ, Liu P, Wang TY, Luo SY, Zhou ML. [Clinicopathological features of invasive micropapillary salivary duct carcinoma]. Zhonghua Bing Li Xue Za Zhi 2020; 49:479-481. [PMID: 32392934 DOI: 10.3760/cma.j.cn112151-20190925-00528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- X B Tang
- Department of Pathology, Taihe Hospital, Hubei University of Medicine,Shiyan 442000, China
| | - Y H Hao
- Department of Pathology, Taihe Hospital, Hubei University of Medicine,Shiyan 442000, China
| | - L Yao
- Department of Pathology, Taihe Hospital, Hubei University of Medicine,Shiyan 442000, China
| | - D Li
- Department of Pathology, Taihe Hospital, Hubei University of Medicine,Shiyan 442000, China
| | - L L Yuan
- Department of Pathology, Taihe Hospital, Hubei University of Medicine,Shiyan 442000, China
| | - X Shen
- Department of Pathology, Danjiangkou People's Hospital of Hubei Province, Danjiangkou 442700, China
| | - D Z Wang
- Department of Pathology, Taihe Hospital, Hubei University of Medicine,Shiyan 442000, China
| | - P Liu
- Department of Pathology, Taihe Hospital, Hubei University of Medicine,Shiyan 442000, China
| | - T Y Wang
- Department of Pathology, Taihe Hospital, Hubei University of Medicine,Shiyan 442000, China
| | - S Y Luo
- Department of Pathology, Taihe Hospital, Hubei University of Medicine,Shiyan 442000, China
| | - M L Zhou
- Department of Pathology, Taihe Hospital, Hubei University of Medicine,Shiyan 442000, China
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Yao L, Tang XB, Yuan LL, Zhou ML, Wang DZ. [Application of double staining with ferrous sulfate and diaminobenzidine in immunohistochemistry for diagnosis of melanin tumors]. Zhonghua Bing Li Xue Za Zhi 2020; 49:482-484. [PMID: 32392935 DOI: 10.3760/cma.j.cn112151-20190917-00506] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- L Yao
- Department of Pathology,Taihe Hospital, Hubei University of Medicine, Shiyan 442000, China
| | - X B Tang
- Department of Pathology,Taihe Hospital, Hubei University of Medicine, Shiyan 442000, China
| | - L L Yuan
- Department of Pathology,Taihe Hospital, Hubei University of Medicine, Shiyan 442000, China
| | - M L Zhou
- Department of Pathology,Taihe Hospital, Hubei University of Medicine, Shiyan 442000, China
| | - D Z Wang
- Department of Pathology,Taihe Hospital, Hubei University of Medicine, Shiyan 442000, China
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25
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Jiang WX, Chen LP, Li H, Guo ZB, Yuan Y, Zhou B, Lu WQ, Yang L, Wu BB, Zhou ML. [Application of mass spectrometry combined with next generation sequencing in the diagnosis of neonatal inherited metabolic diseases]. Zhonghua Yi Xue Za Zhi 2020; 100:1640-1647. [PMID: 32486599 DOI: 10.3760/cma.j.cn112137-20191211-02701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the application value of mass spectrometry (MS) combined with next generation sequencing (NGS) in diagnosing neonatal inherited metabolic diseases (IMD). Methods: The clinical information, metabolites in blood and urine, and gene sequencing results of 19 neonates with IMD coming from the Department of Neonatology of Jiangxi Provincial Children's Hospital from March 2017 to September 2019 were analyzed retrospectively. The metabolites in blood were detected by liquid chromatography tandem mass spectrometry and urine were detected by gas chromatography-mass spectrometry respectively.Meanwhile, the whole bloods were dectected by neonatal genetic disease panel based on NGS. Results: Twelve neonates had the same results between MS and NGS among the 19, 2 had different results from MS to NGS, and 4 had no disease indication by MS but were diagnosed by NGS whose clinical phenotype were partially consistent with NGS results. One of them who did not carry out MS was considered as the diagnosis of IMD because of the detection of gene, and was followed up on this basis. Conclusion: MS could diagnose IMD relatively quickly to guide clinical treatment, and while NGS could verify the results of MS detection. Combination of MS and NGS would understand the cause of disease on genetic level, so as to guide further treatment and genetic consultation.
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Affiliation(s)
- W X Jiang
- Department of Neonatology, Jiangxi Provincial Children's Hospital, Nanchang 330006, China
| | - L P Chen
- Department of Neonatology, Jiangxi Provincial Children's Hospital, Nanchang 330006, China
| | - H Li
- Department of Central Laboratory, Jiangxi Provincial Children's Hospital, Nanchang 330006, China
| | - Z B Guo
- Department of Central Laboratory, Jiangxi Provincial Children's Hospital, Nanchang 330006, China
| | - Y Yuan
- Department of Endocrinology, Metabolism and Genetics, Jiangxi Provincial Children's Hospital, Nanchang 330006, China
| | - B Zhou
- Department of Endocrinology, Metabolism and Genetics, Jiangxi Provincial Children's Hospital, Nanchang 330006, China
| | - W Q Lu
- Department of Neonatology, Jiangxi Provincial Children's Hospital, Nanchang 330006, China
| | - L Yang
- Shanghai Key Laboratory of Birth Defects, the Translational Medicine Center of Children Development and Disease of Fudan University, Children's Hospital of Fudan University, Shanghai 201102, China
| | - B B Wu
- Shanghai Key Laboratory of Birth Defects, the Translational Medicine Center of Children Development and Disease of Fudan University, Children's Hospital of Fudan University, Shanghai 201102, China
| | - M L Zhou
- Department of Neonatology, Jiangxi Provincial Children's Hospital, Nanchang 330006, China
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Qi M, Sun LA, Jiang XC, Han YL, Wang L, Niu WH, Fei MX, Zhaba WD, Zheng LR, Zhou ML. FOXO4 expression associates with glioblastoma development and FOXO4 expression inhibits cell malignant phenotypes in vitro and in vivo. Life Sci 2020; 247:117436. [PMID: 32070707 DOI: 10.1016/j.lfs.2020.117436] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 02/13/2020] [Indexed: 12/28/2022]
Abstract
BACKGROUND AND AIM Forkhead box protein O4 (FOXO4) is a transcription factor, and aberrant FOXO4 expression is associated with development of various human cancers. This study explored the role of FOXO4 in glioma in vitro and in vivo. METHODS FOXO4 expression was first assessed in normal brain tissues, low-grade glioma, glioblastoma multiforme (GBM), normal human astrocytes (HA), and GBM cell lines, while manipulation of FOXO4 expression in glioma cell lines was assessed using qRT-PCR, Western blot, and cell viability CCK-8, Transwell, and a nude mouse subcutaneous xenograft assays. KEY FINDINGS The data showed downregulated FOXO4 expression in GBM tissues and cell lines. FOXO4 overexpression induced by transfection with FOXO4 cDNA significantly inhibited GBM cell proliferation, migration, and invasion, but increased tumor cells to undergo apoptosis in vitro, while suppressed growth of GBM cell subcutaneous xenografts in nude mice. In conclusion, FOXO4 possesses an anti-cancer glioma activity, which could be a novel target for future control of GBM.
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Affiliation(s)
- Min Qi
- Anatomy Experimental Center, Wannan Medical College, Wuhu 241002, Anhui, China; Graduate School of Wannan Medical College, Wuhu 241002, Anhui, China; Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing 210002, Jiangsu, China
| | - Le-An Sun
- Graduate School of Wannan Medical College, Wuhu 241002, Anhui, China; Department of Neurosurgery, Yijishan Hospital, Wannan Medical College, Wuhu 241001, Anhui, China
| | - Xiao-Chun Jiang
- Department of Neurosurgery, Yijishan Hospital, Wannan Medical College, Wuhu 241001, Anhui, China
| | - Yan-Ling Han
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing 210002, Jiangsu, China
| | - Lin Wang
- Department of Pathophysiology, Basic Medical College, Wannan Medical College, Wuhu 241002, Anhui, China
| | - Wen-Hao Niu
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing 210002, Jiangsu, China
| | - Mao-Xing Fei
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing 210002, Jiangsu, China
| | - Wang-Dui Zhaba
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing 210002, Jiangsu, China
| | - Lan-Rong Zheng
- Department of Pathology, Basic Medical College, Wannan Medical College, Wuhu 241002, Anhui, China.
| | - Meng-Liang Zhou
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing 210002, Jiangsu, China.
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Wang JJ, Zhou ML, Chen C, Wu G, Zuo YP, Ren X, Chen Z, Wang WH. [Survival time and influencing factors in multidrug-resistant tuberculosis patients in Wuhan, 2006-2014]. Zhonghua Liu Xing Bing Xue Za Zhi 2019; 40:1409-1413. [PMID: 31838813 DOI: 10.3760/cma.j.issn.0254-6450.2019.11.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the survival time of multidrug-resistant tuberculosis (MDR-TB) patients and the influential factors in Wuhan. Methods: The relevant information were collected from TB management information system, cause of death reporting system and medical records by trained doctors. The univariate and multivariate Cox proportional hazards model were applied to analyze the factors affecting survival time of patients. Results: A total of 552 patients with MDR-TB were included in the analysis. After the diagnosis of MDR-TB, the cumulative survival rates from the first year to the third year were 0.94, 0.88, and 0.80, respectively. The mortality density of MDR-TB patients was 6.52/100 person-years, and the median survival time was (89.52±1.85) months. Kaplan-Meier analysis showed that the cumulative survival rate of the standardized treatment group was significantly higher than that of the non-standardized treatment group (Log rank=101.070, P<0.001). Compared with the patients aged <30 years, the HR of the patients aged 30-years and ≥60 years were 2.987 (95%CI: 1.268-7.036), 4.957 (95%CI: 1.942-12.653). Compared with the patients with the education level of high school and above, the HR of the patients with education level of junior high school/primary school and below were 1.908 (95%CI: 1.152-3.160), 1.681(95%CI: 1.033-2.735). Compared with the patients without diabetes, the HR of the patients with diabetes was 1.961(95%CI: 1.347-2.854). Compared with the patients without other serious diseases, the HR of the patients with other serious diseases was 2.597 (95%CI: 1.820-3.706). Compared with the patients who had been treated less than one time, the HR of the patients having previous treatment with more than 2 times was 1.611 (95%CI: 1.077-2.409). Compared with patients receiving standard MDR regimen treatment, the HR of the patients receiving no standard MDR regimen treatment was 3.155 (95%CI: 2.132-4.670). Conclusions: The cumulative survival rate of MDR-TB patients without standard treatment was significantly lower than that of patients with standard treatment. Older age, low educational level, diabetes mellitus, other serious diseases, more than two times treatment in the past, and receiving no multi-drug resistance regimen treatment were the risk factors affecting the survival of MDR-TB patients.
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Affiliation(s)
- J J Wang
- Wuhan Pulmonary Hospital/Wuhan Institute for Tuberculosis Control, Wuhan 430030, China
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Xu JY, Zhou ML, He YH, Chen DQ. [Characteristics and clinical significance of serum D-dimer level before and after delivery in women with advanced maternal age]. Zhonghua Yi Xue Za Zhi 2019; 99:2768-2772. [PMID: 31550800 DOI: 10.3760/cma.j.issn.0376-2491.2019.35.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the characteristics of serum D-dimer level before and after delivery in women with advanced maternal age (VTE), and to assess the value of the characteristics for the diagnosis of venous thromboembolic disease. Methods: The objects were 785 puerperae with advanced maternal age (AMA) who experienced delivery in Women's Hospital, Zhejiang University School of Medicine during 1(st) Jan 2017 to 31(st) Dec 2017, and 327 puerperae with appropriate maternal age as controls were randomly selected from puerperae who gave birth in the same period. Their serum D-dimer levels before and after delivery were evaluated, and AMAs with high-level postnatal serum D-dimer were specially observed for the prognosis. Besides, puerperae complicated with VTE were retrieved from the medical database during 2014-2018, and their clinical characteristics and dynamic variation of serum D-dimer levels were analyzed. Result: The significant difference of D-dimer levels neither before nor after delivery was not observed between AMAs and controls (antenatal: 1.64(1.19, 2.29) mg/L vs 1.53(1.04, 2.23) mg/L, and postnatal: 2.70(1.71, 2.97) mg/L vs 2.63(1.17, 4.13) mg/L, P<0.05 for both; None of AMAs with high-level serum D-dimer after delivery were complicated with VTE, and most of their serum D-dimer levels decreasedsharply with in four postnatal days (the average decrease was 9.2(7.69,12.74) mg/L, and 96.2% of the sepuerperae's decrease was more than 50%). Eight puerperae complicated with VTE were found in the database from 2014 to 2018, among which five were AMAs. The eight puerperae all received a B ultrasound because of the discomfort of lower limbs or abnormal variation of serum D-dimer levels (a slow decrease or an increase trend), so that a diagnosis of VTE was established; besides, the diagnosis or symptoms all emerged in the 3(rd) to 5(th) day after caesarean. Conclusions: The factor of advanced maternal age has little influence on the serum D-dimer level before or after delivery among pregnant women. It is not a single detection for serum D-dimer level, but the intensive monitoring of clinical symptoms and dynamic change of serum D-dimer level, that helps early diagnosis of VTE.
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Affiliation(s)
- J Y Xu
- Department of Obstetrics, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310006, China
| | - M L Zhou
- Department of Obstetrics, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310006, China
| | - Y H He
- Department of Obstetrics, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310006, China; Department of Gynecology and Obstetrics, Tinglin Hospital of Jinshan District, Shanghai 201505, China
| | - D Q Chen
- Department of Obstetrics, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310006, China
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Hu ZX, Song WN, Lu XD, Zhou ML, Shao JH. Peripheral T lymphocyte immunity and l-dopamine in patients with Parkinson's disease. J BIOL REG HOMEOS AG 2018; 32:687-691. [PMID: 29921400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
This study aimed to evaluate the efficacy of T-cell immune function and L-dopamine (L-DOPA) in patients with Parkinsons disease (PD). Sixty subjects (included in the study group) with PD who were patients of the Neurology Department of The Affiliated Hospital of Hangzhou Normal University from July 2015 to March 2017 were selected. The study group was then categorized into groups according to the age of the patients, severity of disease, level of cognition, and treatment of L-DOPA. The control group (30 cases) was from the healthy population of the check-up center at The Affiliated Hospital of Hangzhou Normal University. The peripheral blood T-lymphocyte subsets of the study group were measured by direct immunofluorescence flow cytometry staining and compared with the control group. At the same time, correlation analysis was carried out on patients with different degrees of disease severity according to staging, different accompanying symptoms, and whether L-DOPA was administered. The results of the study show that the levels of CD4+, CD8+, CD3+, and CD4+/CD8+ peripheral blood in PD patients were significantly lower than those in the control group (P less than 0.05). It was found that the levels of CD4+, CD8+, CD3+, and CD4+/CD8+ decreased with age. The CD4+, CD8+, CD3+, and CD4+/CD8+ in patients with advanced stage PD were more significant than those with low PD stages (P less than 0.05). The levels of CD4+, CD8+, CD3+, and CD4+/CD8+ in the dementia group were significantly lower than those in the non-dementia group (P less than 0.05). The levels of CD4+, CD8+, CD3+, and CD4+/CD8+ in PD patients treated with L-DOPA were higher than those of PD patients without L-DOPA treatment (P less than 0.05). In conclusion, the immune function of T cells in patients suffering from PD is low, and the immune function of T cells in patients with severe disease is lower. Therefore, it is of certain significance to further study the pathophysiological mechanism of PD.
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Affiliation(s)
- Z X Hu
- Department of Neurology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China
| | - W N Song
- Department of Obstetrics, Hangzhou Obstetrics and Gynecology Hospital, Hangzhou, China
| | - X D Lu
- Department of Neurology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China
| | - M L Zhou
- Department of Neurology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China
| | - J H Shao
- Department of Neurology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China
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Ye ZN, Wu LY, Liu JP, Chen Q, Zhang XS, Lu Y, Zhou ML, Li W, Zhang ZH, Xia DY, Zhuang Z, Hang CH. Inhibition of leukotriene B4 synthesis protects against early brain injury possibly via reducing the neutrophil-generated inflammatory response and oxidative stress after subarachnoid hemorrhage in rats. Behav Brain Res 2017; 339:19-27. [PMID: 29133197 DOI: 10.1016/j.bbr.2017.11.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 11/06/2017] [Accepted: 11/08/2017] [Indexed: 11/17/2022]
Abstract
Leukotriene B4 (LTB4) is a highly potent neutrophil chemoattractant and neutrophils induces inflammatory response and oxidative stress when they recruit to and infiltrate in the injuried/inflamed site, such as the brain parenchyma after aneurysmal subarachnoid hemorrhage (SAH). This study is to investigate the potential effects of inhibition of LTB4 synthesis on neutrophil recruitment, inflammatory response and oxidative stress, as well as early brain injury (EBI) in rats after SAH. A pre-chiasmatic cistern SAH model of rats was used in this experiment. SC 57461A was used to inhibit LTB4 synthesis via intracerebroventricular injection. The brain tissues of temporal lobe after SAH were analyzed. Neuronal injury, brain edema and neurological function were evaluated to investigate the development of EBI. We found that inhibition of LTB4 synthesis after SAH could reduce the level of myeloperoxidase, alleviate the inflammatory response and oxidative stress, and reduce neuronal death in the brain parenchyma, and ameliorate brain edema and neurological behavior impairment at 24h after SAH. These results suggest that inhibition of LTB4 synthesis might alleviate EBI after SAH possibly via reducing the neutrophil-generated inflammatory response and oxidative stress.
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Affiliation(s)
- Zhen-Nan Ye
- Department of Neurosurgery, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China; Department of Neurosurgery, Jinling Hospital, Clinical College of Medicine, Southern Medical University (Guangzhou), Nanjing, Jiangsu Province, China
| | - Ling-Yun Wu
- Department of Neurosurgery, The Affiliated Drum Tower Hospital of Nanjing University, Nanjing, Jiangsu Province, China
| | - Jing-Peng Liu
- Department of Neurosurgery, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - Qiang Chen
- Department of Neurosurgery, Jinling Hospital, Clinical College of Medicine, Southern Medical University (Guangzhou), Nanjing, Jiangsu Province, China
| | - Xiang-Sheng Zhang
- Department of Neurosurgery, The Affiliated Drum Tower Hospital of Nanjing University, Nanjing, Jiangsu Province, China
| | - Yue Lu
- Department of Neurosurgery, The Affiliated Drum Tower Hospital of Nanjing University, Nanjing, Jiangsu Province, China
| | - Meng-Liang Zhou
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
| | - Wei Li
- Department of Neurosurgery, The Affiliated Drum Tower Hospital of Nanjing University, Nanjing, Jiangsu Province, China
| | - Zi-Huan Zhang
- Department of Neurosurgery, Zhongdu Hospital, Bengbu, Anhui Province, China
| | - Da-Yong Xia
- Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College, 2 West Zheshan Road, Wuhu, Anhui Province, China
| | - Zong Zhuang
- Department of Neurosurgery, The Affiliated Drum Tower Hospital of Nanjing University, Nanjing, Jiangsu Province, China.
| | - Chun-Hua Hang
- Department of Neurosurgery, The Affiliated Drum Tower Hospital of Nanjing University, Nanjing, Jiangsu Province, China.
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Vellimana AK, Zhou ML, Singh I, Aum DJ, Nelson JW, Harris GR, Athiraman U, Han BH, Zipfel GJ. Minocycline protects against delayed cerebral ischemia after subarachnoid hemorrhage via matrix metalloproteinase-9 inhibition. Ann Clin Transl Neurol 2017; 4:865-876. [PMID: 29296615 PMCID: PMC5740245 DOI: 10.1002/acn3.492] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 09/06/2017] [Accepted: 09/25/2017] [Indexed: 12/11/2022] Open
Abstract
Objective Delayed cerebral ischemia (DCI) is an independent risk factor for poor outcome after aneurysmal subarachnoid hemorrhage (SAH) and is multifactorial in etiology. While prior studies have suggested a role for matrix metalloproteinase-9 (MMP-9) in early brain injury after SAH, its contribution to the pathophysiology of DCI is unclear. Methods In the first experiment, wild-type (WT) and MMP-9-/- mice were subjected to sham or endovascular perforation SAH surgery. In separate experiments, WT and MMP-9-/-mice were administered vehicle or minocycline either pre- or post-SAH. All mice underwent assessment of multiple components of DCI including vasospasm, neurobehavioral function, and microvessel thrombosis. In another experiment, rabbits were subjected to sham or cisterna magna injection SAH surgery, and administered vehicle or minocycline followed by vasospasm assessment. Results MMP-9 expression and activity was increased after SAH. Genetic (MMP-9-/- mice) and pharmacological (pre-SAH minocycline administration) inhibition of MMP-9 resulted in decreased vasospasm and neurobehavioral deficits. A therapeutically feasible strategy of post-SAH administration of minocycline resulted in attenuation of multiple components of DCI. Minocycline administration to MMP-9-/- mice did not yield additional protection. Consistent with experiments in mice, both pre- and post-SAH administration of minocycline attenuated SAH-induced vasospasm in rabbits. Interpretation MMP-9 is a key player in the pathogenesis of DCI. The consistent attenuation of multiple components of DCI with both pre- and post-SAH administration of minocycline across different species and experimental models of SAH, combined with the excellent safety profile of minocycline in humans suggest that a clinical trial in SAH patients is warranted.
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Affiliation(s)
- Ananth K Vellimana
- Department of Neurological Surgery Washington University School of Medicine St. Louis Missouri
| | - Meng-Liang Zhou
- Department of Neurosurgery Jinling Hospital School of Medicine Nanjing University Nanjing Jiangsu Province China
| | - Itender Singh
- Department of Neurological Surgery Washington University School of Medicine St. Louis Missouri
| | - Diane J Aum
- Department of Neurological Surgery Washington University School of Medicine St. Louis Missouri
| | - James W Nelson
- Department of Neurological Surgery Washington University School of Medicine St. Louis Missouri
| | - Glenn R Harris
- Department of Neurological Surgery Washington University School of Medicine St. Louis Missouri
| | - Umeshkumar Athiraman
- Department of Anesthesiology Washington University School of Medicine St. Louis Missouri
| | - Byung H Han
- Department of Pharmacology A.T. Still University of Health Sciences Kirksville College of Osteopathic Medicine Kirksville Missouri
| | - Gregory J Zipfel
- Department of Neurological Surgery Washington University School of Medicine St. Louis Missouri
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Vellimana AK, Zhou ML, Singh I, Aum DJ, Nelson J, Han BH, Zipfel GJ. 379 Matrix Metalloproteinase-9. Neurosurgery 2017. [DOI: 10.1093/neuros/nyx417.379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Wu LY, Ye ZN, Zhou CH, Wang CX, Xie GB, Zhang XS, Gao YY, Zhang ZH, Zhou ML, Zhuang Z, Liu JP, Hang CH, Shi JX. Roles of Pannexin-1 Channels in Inflammatory Response through the TLRs/NF-Kappa B Signaling Pathway Following Experimental Subarachnoid Hemorrhage in Rats. Front Mol Neurosci 2017. [PMID: 28634441 PMCID: PMC5459922 DOI: 10.3389/fnmol.2017.00175] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Background: Accumulating evidence suggests that neuroinflammation plays a critical role in early brain injury after subarachnoid hemorrhage (SAH). Pannexin-1 channels, as a member of gap junction proteins located on the plasma membrane, releases ATP, ions, second messengers, neurotransmitters, and molecules up to 1 kD into the extracellular space, when activated. Previous studies identified that the opening of Pannexin-1 channels is essential for cellular migration, apoptosis and especially inflammation, but its effects on inflammatory response in SAH model have not been explored yet. Methods: Adult male Sprague-Dawley rats were divided into six groups: sham group (n = 20), SAH group (n = 20), SAH + LV-Scramble-ShRNA group (n = 20), SAH + LV-ShRNA-Panx1 group (n = 20), SAH + LV-NC group (n = 20), and SAH + LV-Panx1-EGFP group (n = 20). The rat SAH model was induced by injection of 0.3 ml fresh arterial, non-heparinized blood into the prechiasmatic cistern in 20 s. In SAH + LV-ShRNA-Panx1 group and SAH + LV-Panx1-EGFP group, lentivirus was administered via intracerebroventricular injection (i.c.v.) at 72 h before the induction of SAH. The Quantitative real-time polymerase chain reaction, electrophoretic mobility shift assay, enzyme-linked immunosorbent assay, immunofluorescence staining, and western blotting were performed to explore the potential interactive mechanism between Pannexin-1 channels and TLR2/TLR4/NF-κB-mediated signaling pathway. Cognitive and memory changes were investigated by the Morris water maze test. Results: Administration with LV-ShRNA-Panx1 markedly decreased the expression levels of TLR2/4/NF-κB pathway-related agents in the brain cortex and significantly ameliorated neurological cognitive and memory deficits in this SAH model. On the contrary, administration of LV-Panx1-EGFP elevated the expressions of TLR2/4/NF-κB pathway-related agents, which correlated with augmented neuronal apoptosis. Conclusion: Pannexin-1 channels may contribute to inflammatory response and neurobehavioral dysfunction through the TLR2/TLR4/NF-κB-mediated pathway signaling after SAH, suggesting a potential role of Pannexin-1 channels could be a potential therapeutic target for the treatment of SAH.
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Affiliation(s)
- Ling-Yun Wu
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing UniversityNanjing, China
| | - Zhen-Nan Ye
- Department of Neurosurgery, The Second Affiliated Hospital of Guangzhou Medical UniversityGuangzhou, China
| | - Chen-Hui Zhou
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing UniversityNanjing, China
| | - Chun-Xi Wang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing UniversityNanjing, China
| | - Guang-Bin Xie
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing UniversityNanjing, China
| | - Xiang-Sheng Zhang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing UniversityNanjing, China
| | - Yong-Yue Gao
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing UniversityNanjing, China
| | - Zi-Huan Zhang
- Department of Neurosurgery, Zhongdu HospitalBengbu, China
| | - Meng-Liang Zhou
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing UniversityNanjing, China
| | - Zong Zhuang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing UniversityNanjing, China
| | - Jing-Peng Liu
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Southern Medical UniversityNanjing, China
| | - Chun-Hua Hang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing UniversityNanjing, China.,Department of Neurosurgery, Jinling Hospital, School of Medicine, Southern Medical UniversityNanjing, China
| | - Ji-Xin Shi
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing UniversityNanjing, China
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Xia DY, Zhang HS, Wu LY, Zhang XS, Zhou ML, Hang CH. Pentoxifylline Alleviates Early Brain Injury After Experimental Subarachnoid Hemorrhage in Rats: Possibly via Inhibiting TLR 4/NF-κB Signaling Pathway. Neurochem Res 2016; 42:963-974. [PMID: 27933551 DOI: 10.1007/s11064-016-2129-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 11/05/2016] [Accepted: 11/29/2016] [Indexed: 01/23/2023]
Abstract
Early brain injury (EBI) after subarachnoid hemorrhage (SAH) generally causes significant and lasting damage. Pentoxifylline (PTX), a nonselective phosphodiesterase inhibitor, has shown anti-inflammatory and neuroprotective properties in several brain injury models, but the role of PTX with respect to EBI following SAH remains uncertain. The purpose of this study was to investigate the effects of PTX on EBI after SAH in rats. Adult male Sprauge-Dawley rats were randomly assigned to the sham and SAH groups. PTX (30 or 60 mg/kg) or an equal volume of the administration vehicle (normal saline) was administrated at 30 min intervals following SAH. Neurological scores, brain edema, and neural cell apoptosis were evaluated. In order to explore other mechanisms, changes in the toll-like receptor 4 (TLR4) and the nuclear factor-κB (NF-κB) signaling pathway, in terms of the levels of apoptosis-associated proteins, were also investigated. We found that administration of PTX (60 mg/kg) notably improved neurological function and decreased brain edema at both 24 and 72 h following SAH. Treatment with PTX (60 mg/kg) significantly inhibited the protein expressions of TLR4, NF-κB, MyD88 and the downstream pro-inflammatory cytokines, such as the tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β). PTX also significantly reduced neural cell death and BBB permeability. Our observations may be the first time that PTX has been shown to play a neuroprotective role in EBI after SAH, potentially by suppressing the TLR4/NF-κB inflammation-related pathway in the rat brain.
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Affiliation(s)
- Da-Yong Xia
- Department of Neurosurgery, Jinling Clinical Medical College of Nanjing Medical University, 305 East Zhongshan Road, Nanjing, 210002, Jiangshu Province, People's Republic of China.,Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College, 2 West Zheshan Road, Wuhu, 241001, Anhui Province, People's Republic of China
| | - Hua-Sheng Zhang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, 305 East Zhongshan Road, Nanjing, 210002, Jiangsu Province, People's Republic of China
| | - Ling-Yun Wu
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, 305 East Zhongshan Road, Nanjing, 210002, Jiangsu Province, People's Republic of China
| | - Xiang-Sheng Zhang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, 305 East Zhongshan Road, Nanjing, 210002, Jiangsu Province, People's Republic of China
| | - Meng-Liang Zhou
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, 305 East Zhongshan Road, Nanjing, 210002, Jiangsu Province, People's Republic of China
| | - Chun-Hua Hang
- Department of Neurosurgery, Jinling Clinical Medical College of Nanjing Medical University, 305 East Zhongshan Road, Nanjing, 210002, Jiangshu Province, People's Republic of China.
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Ye ZN, Zhuang Z, Wu LY, Liu JP, Chen Q, Zhang XS, Zhou ML, Zhang ZH, Li W, Wang XL, Hang CH. Expression and cell distribution of leukotriene B4 receptor 1 in the rat brain cortex after experimental subarachnoid hemorrhage. Brain Res 2016; 1652:127-134. [PMID: 27725151 DOI: 10.1016/j.brainres.2016.10.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2016] [Revised: 08/16/2016] [Accepted: 10/06/2016] [Indexed: 02/08/2023]
Abstract
Convincing evidence supports that nuclear factor kappa B (NF-κB)-meditated inflammation contributes to the adverse prognosis of aneurysmal subarachnoid hemorrhage (SAH), and pathologic neutrophil accumulation after SAH in the brain parenchyma enhances the inflammatory process. Leukotriene B4 (LTB4) is a highly potent lipid chemoattractant of neutrophils, and its biological effects are mediated primarily through the high-affinity LTB4 receptor 1 (BLT1). It is verified that NF-κB-dependent BLT1 mediates LTB4 signaling and LTB4 stimulates NF-κB-dependent inflammation via BLT1. This study aimed to determine the expression and cell distribution of BLT1 in the brain cortex after SAH and investigate the potential relationship between protein expressions of BLT1 and NF-κB. Male Sprague-Dawley rats were randomly assigned into sham group and SAH groups at 6h, 12h and on day 1, day 2 and day 3 (n=6 for each subgroup). SAH groups suffered experimental SAH by injecting 0.3ml autologous blood into the prechiasmatic cistern. BLT1 expression was measured by real-time PCR, western blot, immunohistochemistry and immunofluorescence. Nuclear expression of p65 protein, the major subunit of NF-κB, was also detected by western blot. Our data showed that the expression levels of BLT1 and nuclear p65 protein were both markedly increased after SAH. Moreover, there was a significant positive correlation between BLT1 and nuclear p65 protein expressions in the same specific time course. Double immunofluorescence staining showed that BLT1 were mainly expressed in neurons, microglia and endothelial cells rather than astrocytes after SAH. These results suggest that BLT1 may participate in the NF-κB-mediated inflammatory response after SAH, and there might be important implications for further studies using specific BLT1 antagonists to attenuate the NF-κB-mediated inflammation after SAH.
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Affiliation(s)
- Zhen-Nan Ye
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Southern Medical University (Guangzhou), Nanjing, Jiangsu Province, China
| | - Zong Zhuang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
| | - Ling-Yun Wu
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
| | - Jing-Peng Liu
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Southern Medical University (Guangzhou), Nanjing, Jiangsu Province, China
| | - Qiang Chen
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Southern Medical University (Guangzhou), Nanjing, Jiangsu Province, China
| | - Xiang-Sheng Zhang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
| | - Meng-Liang Zhou
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
| | - Zi-Huan Zhang
- Department of Neurosurgery, Zhongdu Hospital, Bengbu, Anhui Province, China
| | - Wei Li
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
| | - Xiao-Liang Wang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
| | - Chun-Hua Hang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Southern Medical University (Guangzhou), Nanjing, Jiangsu Province, China.
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Zhang XS, Li W, Wu Q, Wu LY, Ye ZN, Liu JP, Zhuang Z, Zhou ML, Zhang X, Hang CH. Resveratrol Attenuates Acute Inflammatory Injury in Experimental Subarachnoid Hemorrhage in Rats via Inhibition of TLR4 Pathway. Int J Mol Sci 2016; 17:ijms17081331. [PMID: 27529233 PMCID: PMC5000728 DOI: 10.3390/ijms17081331] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 08/02/2016] [Accepted: 08/08/2016] [Indexed: 12/13/2022] Open
Abstract
Toll-like receptor 4 (TLR4) has been proven to play a critical role in neuroinflammation and to represent an important therapeutic target following subarachnoid hemorrhage (SAH). Resveratrol (RSV), a natural occurring polyphenolic compound, has a powerful anti-inflammatory property. However, the underlying molecular mechanisms of RSV in protecting against early brain injury (EBI) after SAH remain obscure. The purpose of this study was to investigate the effects of RSV on the TLR4-related inflammatory signaling pathway and EBI in rats after SAH. A prechiasmatic cistern SAH model was used in our experiment. The expressions of TLR4, high-mobility group box 1 (HMGB1), myeloid differentiation factor 88 (MyD88), and nuclear factor-κB (NF-κB) were evaluated by Western blot and immunohistochemistry. The expressions of Iba-1 and pro-inflammatory cytokines in brain cortex were determined by Western blot, immunofluorescence staining, or enzyme-linked immunosorbent assay. Neural apoptosis, brain edema, and neurological function were further evaluated to investigate the development of EBI. We found that post-SAH treatment with RSV could markedly inhibit the expressions of TLR4, HMGB1, MyD88, and NF-κB. Meanwhile, RSV significantly reduced microglia activation, as well as inflammatory cytokines leading to the amelioration of neural apoptosis, brain edema, and neurological behavior impairment at 24 h after SAH. However, RSV treatment failed to alleviate brain edema and neurological deficits at 72 h after SAH. These results indicated that RSV treatment could alleviate EBI after SAH, at least in part, via inhibition of TLR4-mediated inflammatory signaling pathway.
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Affiliation(s)
- Xiang-Sheng Zhang
- Department of Neurosurgery, School of Medicine, Nanjing University, Jinling Hospital, 305 East Zhongshan Road, Nanjing 210002, China.
| | - Wei Li
- Department of Neurosurgery, School of Medicine, Nanjing University, Jinling Hospital, 305 East Zhongshan Road, Nanjing 210002, China.
| | - Qi Wu
- Department of Neurosurgery, School of Medicine, Nanjing University, Jinling Hospital, 305 East Zhongshan Road, Nanjing 210002, China.
| | - Ling-Yun Wu
- Department of Neurosurgery, School of Medicine, Nanjing University, Jinling Hospital, 305 East Zhongshan Road, Nanjing 210002, China.
| | - Zhen-Nan Ye
- Department of Neurosurgery, School of Medicine, Southern Medical University (Guangzhou), Jinling Hospital, 305 East Zhongshan Road, Nanjing 210002, China.
| | - Jing-Peng Liu
- Department of Neurosurgery, School of Medicine, Southern Medical University (Guangzhou), Jinling Hospital, 305 East Zhongshan Road, Nanjing 210002, China.
| | - Zong Zhuang
- Department of Neurosurgery, School of Medicine, Nanjing University, Jinling Hospital, 305 East Zhongshan Road, Nanjing 210002, China.
| | - Meng-Liang Zhou
- Department of Neurosurgery, School of Medicine, Nanjing University, Jinling Hospital, 305 East Zhongshan Road, Nanjing 210002, China.
| | - Xin Zhang
- Department of Neurosurgery, School of Medicine, Nanjing University, Jinling Hospital, 305 East Zhongshan Road, Nanjing 210002, China.
- Department of Neurosurgery, School of Medicine, Southern Medical University (Guangzhou), Jinling Hospital, 305 East Zhongshan Road, Nanjing 210002, China.
| | - Chun-Hua Hang
- Department of Neurosurgery, School of Medicine, Nanjing University, Jinling Hospital, 305 East Zhongshan Road, Nanjing 210002, China.
- Department of Neurosurgery, School of Medicine, Southern Medical University (Guangzhou), Jinling Hospital, 305 East Zhongshan Road, Nanjing 210002, China.
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Huang H, Zhou ML, Li DP, Chai W, Pan R, Niu HZ, He M, Ji QJ, Jiang JS, Ding W. [The influence on the peeling off time of the tunica albuginea after 4-8℃ cool water was applied to children's low temperature plasma-assisted tonsillectomy]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2016; 30:1224-1226. [PMID: 29798334 DOI: 10.13201/j.issn.1001-1781.2016.15.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 11/22/2015] [Indexed: 11/12/2022]
Abstract
Objective:The aim of this study is to discuss the influence on the peeling off time of the tunica albuginea after 4-8℃ cool water was applied to children 's low temperature plasmaassisted tonsillectomy.Method:One hundred and seventeen benign hypertrophy of tonsil patients were recruited,the 56 cases of them were served as experimental group,who were treated with plasma tonsillectomy using 4-8℃ normal saline as medium,while the 61 cases were served as control group,who were treated with plasma tonsillectomy using 22-25℃ normal saline as medium.Then,we analyzed the peeling off time of the tunica albuginea between experimental and control group.Result:The difference of formation time between experimental group and control group was not statistically significant(P >0.05).The average peeling off time of the tunica albuginea was (11.32±2.51) days in experimental group,while time was(15.03±4.12) days in control group.There was a statistical difference between them.Conclusion:The use of 4-8℃ cold water in children's low temperature plasma-assisted tonsillectomy can reduce the peeling off time of the tunica albuginea,and it indicate that the ice water medium can reduce the heat injury caused by the plasma operation.
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Affiliation(s)
- H Huang
- Department of Otolaryngology Head and Neck Surgery,People's Hospital of Bozhou,Bozhou,236800,China
| | - M L Zhou
- Department of Otolaryngology Head and Neck Surgery,People's Hospital of Bozhou,Bozhou,236800,China
| | - D P Li
- Department of Otolaryngology Head and Neck Surgery,People's Hospital of Bozhou,Bozhou,236800,China
| | - W Chai
- Department of Otolaryngology Head and Neck Surgery,People's Hospital of Bozhou,Bozhou,236800,China
| | - R Pan
- Operation Room,People's Hospital of Bozhou
| | - H Z Niu
- Operation Room,People's Hospital of Bozhou
| | - M He
- Department of Otolaryngology Head and Neck Surgery,People's Hospital of Bozhou,Bozhou,236800,China
| | - Q J Ji
- Department of Otolaryngology Head and Neck Surgery,People's Hospital of Bozhou,Bozhou,236800,China
| | - J S Jiang
- Department of Otolaryngology Head and Neck Surgery,People's Hospital of Bozhou,Bozhou,236800,China
| | - W Ding
- Department of Otolaryngology Head and Neck Surgery,People's Hospital of Bozhou,Bozhou,236800,China
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Hao XK, Wu W, Wang CX, Xie GB, Li T, Wu HM, Huang LT, Zhou ML, Hang CH, Shi JX. Ghrelin alleviates early brain injury after subarachnoid hemorrhage via the PI3K/Akt signaling pathway. Brain Res 2014; 1587:15-22. [PMID: 25199591 DOI: 10.1016/j.brainres.2014.08.069] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 08/25/2014] [Accepted: 08/29/2014] [Indexed: 12/25/2022]
Abstract
Early brain injury (EBI) plays a key role in the pathogenesis of subarachnoid hemorrhage (SAH). Although the neuroprotective effects of ghrelin have been demonstrated in several studies, whether ghrelin reduces EBI after SAH remains unknown. In this study, we hypothesized that treatment with ghrelin would attenuate EBI after SAH, and that this protection would be mediated, at least in part, by activation of the PI3K/Akt signaling pathway. Adult male Sprague-Dawley rats (n=100) were randomly divided into the following groups: control group (n=20), SAH group (n=20), SAH+vehicle group (n=20), SAH+ghrelin group (n=20) and SAH+ghrelin+LY294002 group (n=20). The rats were injected with autologous blood (0.3mL) into the prechiasmatic cistern to induce SAH. Ghrelin (80μg/kg, IP), or an equal volume of vehicle, was administered immediately after surgery. The PI3K inhibitor, LY294002, was applied to manipulate the proposed pathway. Mortality, neurological scores, brain edema, cell apoptosis, and the expression of p-Akt, and cleaved caspase-3 proteins were assayed after 24h SAH. Ghrelin significantly improved neurological function and reduced neuronal apoptosis and brain edema at 24h after SAH. The level of p-Akt, expressed mainly in neurons, was markedly up-regulated. Additionally, the level of cleaved caspase-3 was decreased by ghrelin treatment. The beneficial effects of ghrelin in SAH rats were partially suppressed by LY294002. These results demonstrate that ghrelin may reduce EBI after SAH, via a mechanism involving the PI3K/Akt signaling pathway.
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Affiliation(s)
- Xiao-Ke Hao
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Second Military Medical University, Shanghai, China
| | - Wei Wu
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Second Military Medical University, Shanghai, China; Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
| | - Chun-Xi Wang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
| | - Guang-Bin Xie
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
| | - Tao Li
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
| | - He-Ming Wu
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Second Military Medical University, Shanghai, China
| | - Li-Tian Huang
- Department of Neurosurgery, School of Medicine, Southern Medical University (Guangzhou), Jinling Hospital, Nanjing, Jiangsu Province, China
| | - Meng-Liang Zhou
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
| | - Chun-Hua Hang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Second Military Medical University, Shanghai, China; Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
| | - Ji-Xin Shi
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Second Military Medical University, Shanghai, China; Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
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Milner E, Zhou ML, Johnson AW, Vellimana AK, Greenberg JK, Holtzman DM, Han BH, Zipfel GJ. Cerebral amyloid angiopathy increases susceptibility to infarction after focal cerebral ischemia in Tg2576 mice. Stroke 2014; 45:3064-9. [PMID: 25190447 DOI: 10.1161/strokeaha.114.006078] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND AND PURPOSE We and others have shown that soluble amyloid β-peptide (Aβ) and cerebral amyloid angiopathy (CAA) cause significant cerebrovascular dysfunction in mutant amyloid precursor protein (APP) mice, and that these deficits are greater in aged APP mice having CAA compared with young APP mice lacking CAA. Amyloid β-peptide in young APP mice also increases infarction after focal cerebral ischemia, but the impact of CAA on ischemic brain injury is unknown. METHODS To determine this, we assessed cerebrovascular reactivity, cerebral blood flow (CBF), and extent of infarction and neurological deficits after transient middle cerebral artery occlusion in aged APP mice having extensive CAA versus young APP mice lacking CAA (and aged-matched littermate controls). RESULTS We found that aged APP mice have more severe cerebrovascular dysfunction that is CAA dependent, have greater CBF compromise during and immediately after middle cerebral artery occlusion, and develop larger infarctions after middle cerebral artery occlusion. CONCLUSIONS These data indicate CAA induces a more severe form of cerebrovascular dysfunction than amyloid β-peptide alone, leading to intra- and postischemic CBF deficits that ultimately exacerbate cerebral infarction. Our results shed mechanistic light on human studies identifying CAA as an independent risk factor for ischemic brain injury.
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Affiliation(s)
- Eric Milner
- From the Department of Neurological Surgery (E.M., M.-L.Z., A.W.J., A.K.V., J.K.G., B.H.H., G.J.Z.), Program in Neuroscience (E.M.), Department of Neurology (D.M.H., G.J.Z.), Department of Developmental Biology (D.M.H.), and Hope Center for Neurological Disorders (D.M.H., B.H.H., G.J.Z.), Washington University School of Medicine, St. Louis, MO
| | - Meng-Liang Zhou
- From the Department of Neurological Surgery (E.M., M.-L.Z., A.W.J., A.K.V., J.K.G., B.H.H., G.J.Z.), Program in Neuroscience (E.M.), Department of Neurology (D.M.H., G.J.Z.), Department of Developmental Biology (D.M.H.), and Hope Center for Neurological Disorders (D.M.H., B.H.H., G.J.Z.), Washington University School of Medicine, St. Louis, MO
| | - Andrew W Johnson
- From the Department of Neurological Surgery (E.M., M.-L.Z., A.W.J., A.K.V., J.K.G., B.H.H., G.J.Z.), Program in Neuroscience (E.M.), Department of Neurology (D.M.H., G.J.Z.), Department of Developmental Biology (D.M.H.), and Hope Center for Neurological Disorders (D.M.H., B.H.H., G.J.Z.), Washington University School of Medicine, St. Louis, MO
| | - Ananth K Vellimana
- From the Department of Neurological Surgery (E.M., M.-L.Z., A.W.J., A.K.V., J.K.G., B.H.H., G.J.Z.), Program in Neuroscience (E.M.), Department of Neurology (D.M.H., G.J.Z.), Department of Developmental Biology (D.M.H.), and Hope Center for Neurological Disorders (D.M.H., B.H.H., G.J.Z.), Washington University School of Medicine, St. Louis, MO
| | - Jacob K Greenberg
- From the Department of Neurological Surgery (E.M., M.-L.Z., A.W.J., A.K.V., J.K.G., B.H.H., G.J.Z.), Program in Neuroscience (E.M.), Department of Neurology (D.M.H., G.J.Z.), Department of Developmental Biology (D.M.H.), and Hope Center for Neurological Disorders (D.M.H., B.H.H., G.J.Z.), Washington University School of Medicine, St. Louis, MO
| | - David M Holtzman
- From the Department of Neurological Surgery (E.M., M.-L.Z., A.W.J., A.K.V., J.K.G., B.H.H., G.J.Z.), Program in Neuroscience (E.M.), Department of Neurology (D.M.H., G.J.Z.), Department of Developmental Biology (D.M.H.), and Hope Center for Neurological Disorders (D.M.H., B.H.H., G.J.Z.), Washington University School of Medicine, St. Louis, MO
| | - Byung Hee Han
- From the Department of Neurological Surgery (E.M., M.-L.Z., A.W.J., A.K.V., J.K.G., B.H.H., G.J.Z.), Program in Neuroscience (E.M.), Department of Neurology (D.M.H., G.J.Z.), Department of Developmental Biology (D.M.H.), and Hope Center for Neurological Disorders (D.M.H., B.H.H., G.J.Z.), Washington University School of Medicine, St. Louis, MO
| | - Gregory J Zipfel
- From the Department of Neurological Surgery (E.M., M.-L.Z., A.W.J., A.K.V., J.K.G., B.H.H., G.J.Z.), Program in Neuroscience (E.M.), Department of Neurology (D.M.H., G.J.Z.), Department of Developmental Biology (D.M.H.), and Hope Center for Neurological Disorders (D.M.H., B.H.H., G.J.Z.), Washington University School of Medicine, St. Louis, MO.
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Zhang XS, Zhang X, Wu Q, Li W, Zhang QR, Wang CX, Zhou XM, Li H, Shi JX, Zhou ML. Astaxanthin alleviates early brain injury following subarachnoid hemorrhage in rats: possible involvement of Akt/bad signaling. Mar Drugs 2014; 12:4291-310. [PMID: 25072152 PMCID: PMC4145317 DOI: 10.3390/md12084291] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 07/04/2014] [Accepted: 07/07/2014] [Indexed: 11/25/2022] Open
Abstract
Apoptosis has been proven to play a crucial role in early brain injury pathogenesis and to represent a target for the treatment of subarachnoid hemorrhage (SAH). Previously, we demonstrated that astaxanthin (ATX) administration markedly reduced neuronal apoptosis in the early period after SAH. However, the underlying molecular mechanisms remain obscure. In the present study, we tried to investigate whether ATX administration is associated with the phosphatidylinositol 3-kinase-Akt (PI3K/Akt) pathway, which can play an important role in the signaling of apoptosis. Our results showed that post-SAH treatment with ATX could cause a significant increase of phosphorylated Akt and Bad levels, along with a significant decrease of cleaved caspase-3 levels in the cortex after SAH. In addition to the reduced neuronal apoptosis, treatment with ATX could also significantly reduce secondary brain injury characterized by neurological dysfunction, cerebral edema and blood-brain barrier disruption. In contrast, the PI3K/Akt inhibitor, LY294002, could partially reverse the neuroprotection of ATX in the early period after SAH by downregulating ATX-induced activation of Akt/Bad and upregulating cleaved caspase-3 levels. These results provided the evidence that ATX could attenuate apoptosis in a rat SAH model, potentially, in part, through modulating the Akt/Bad pathway.
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Affiliation(s)
- Xiang-Sheng Zhang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing 210000, Jiangsu, China.
| | - Xin Zhang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing 210000, Jiangsu, China.
| | - Qi Wu
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing 210000, Jiangsu, China.
| | - Wei Li
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing 210000, Jiangsu, China.
| | - Qing-Rong Zhang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing 210000, Jiangsu, China.
| | - Chun-Xi Wang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing 210000, Jiangsu, China.
| | - Xiao-Ming Zhou
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing 210000, Jiangsu, China.
| | - Hua Li
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing 210000, Jiangsu, China.
| | - Ji-Xin Shi
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing 210000, Jiangsu, China.
| | - Meng-Liang Zhou
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing 210000, Jiangsu, China.
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Sun Q, Wu W, Hu YC, Li H, Zhang D, Li S, Li W, Li WD, Ma B, Zhu JH, Zhou ML, Hang CH. Early release of high-mobility group box 1 (HMGB1) from neurons in experimental subarachnoid hemorrhage in vivo and in vitro. J Neuroinflammation 2014; 11:106. [PMID: 24924349 PMCID: PMC4107626 DOI: 10.1186/1742-2094-11-106] [Citation(s) in RCA: 116] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2013] [Accepted: 05/29/2014] [Indexed: 12/25/2022] Open
Abstract
Background Translocation of high-mobility group box 1 (HMGB1) from nucleus could trigger inflammation. Extracellular HMGB1 up-regulates inflammatory response in sepsis as a late mediator. However, little was known about its role in subarachnoid hemorrhage-inducible inflammation, especially in the early stage. This study aims to identify whether HMGB1 translocation occurred early after SAH and also to clarify the potential role of HMGB1 in brain injury following SAH. Methods Sprague-Dawley (SD) rats were randomly divided into sham group and SAH groups at 2 h, 12 h and on day 1, day 2. SAH groups suffered experimental subarachnoid hemorrhage by injection of 0.3 ml autoblood into the pre-chiasmatic cistern. Rats injected by recombinant HMGB1(rHMGB1) solution were divided into four groups according to different time points. Cultured neurons were assigned into control group and four hemoglobin (Hb) incubated groups. Mixed glial cells were cultured and stimulated in medium from neurons incubated by Hb. HMGB1 expression is measured by western blot analysis, real-time polymerase chain reaction (PCR), immunohistochemistry and immunofluorescence. Downstream nuclear factor kappa B (NF-κB) subunit P65 and inflammatory factor Interleukin 1β (IL-1β) were measured by western blot and real-time PCR, respectively. Brain injury was evaluated by cleaved caspase-3 staining. Results Our results demonstrated HMGB1 translocation occurred as early as 2 h after experimental SAH with mRNA and protein level increased. Immunohistochemistry and immunofluorescence results indicated cytosolic HMGB1 was mainly located in neurons while translocated HMGB1 could also be found in some microglia. After subarachnoid injection of rHMGB1, NF-κB, downstream inflammatory response and cleaved caspase-3 were up-regulated in the cortex compared to the saline control group. In-vitro, after Hb incubation, HMGB1 was also rapidly released from neurons to medium. Incubation with medium from neurons up-regulated IL-1β in mixed glial cells. This effect could be inhibited by HMGB1 specific inhibitor glycyrrhizic acid (GA) treatment. Conclusion HMGB1 was released from neurons early after SAH onset and might trigger inflammation as an upstream inflammatory mediator. Extracellular HMGB1 contributed to the brain injury after SAH. These results might have important implications during the administration of specific HMGB1 antagonists early in order to prevent or reduce inflammatory response following SAH.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | - Chun-Hua Hang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China.
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Zhang XS, Zhang X, Wu Q, Li W, Wang CX, Xie GB, Zhou XM, Shi JX, Zhou ML. Astaxanthin offers neuroprotection and reduces neuroinflammation in experimental subarachnoid hemorrhage. J Surg Res 2014; 192:206-13. [PMID: 24948541 DOI: 10.1016/j.jss.2014.05.029] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 05/02/2014] [Accepted: 05/13/2014] [Indexed: 12/31/2022]
Abstract
BACKGROUND Neuroinflammation has been proven to play a crucial role in early brain injury pathogenesis and represents a target for treatment of subarachnoid hemorrhage (SAH). Astaxanthin (ATX), a dietary carotenoid, has been shown to have powerful anti-inflammation property in various models of tissue injury. However, the potential effects of ATX on neuroinflammation in SAH remain uninvestigated. The goal of this study was to investigate the protective effects of ATX on neuroinflammation in a rat prechiasmatic cistern SAH model. METHODS Rats were randomly distributed into multiple groups undergoing the sham surgery or SAH procedures, and ATX (25 mg/kg or 75 mg/kg) or equal volume of vehicle was given by oral gavage at 30 min after SAH. All rats were sacrificed at 24 h after SAH. Neurologic scores, brain water content, blood-brain barrier permeability, and neuronal cell death were examined. Brain inflammation was evaluated by means of expression changes in myeloperoxidase, cytokines (interleukin-1β, tumor necrosis factor-α), adhesion molecules (intercellular adhesion molecule-1), and nuclear factor kappa B DNA-binding activity. RESULTS Our data indicated that post-SAH treatment with high dose of ATX could significantly downregulate the increased nuclear factor kappa B activity and the expression of inflammatory cytokines and intercellular adhesion molecule-1 in both messenger RNA transcription and protein synthesis. Moreover, these beneficial effects lead to the amelioration of the secondary brain injury cascades including cerebral edema, blood-brain barrier disruption, neurological dysfunction, and neuronal degeneration. CONCLUSIONS These results indicate that ATX treatment is neuroprotective against SAH, possibly through suppression of cerebral inflammation.
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Affiliation(s)
- Xiang-Sheng Zhang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
| | - Xin Zhang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China.
| | - Qi Wu
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
| | - Wei Li
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
| | - Chun-Xi Wang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
| | - Guang-Bin Xie
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
| | - Xiao-Ming Zhou
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
| | - Ji-Xin Shi
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
| | - Meng-Liang Zhou
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China.
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Zhang XS, Zhang X, Zhou ML, Zhou XM, Li N, Li W, Cong ZX, Sun Q, Zhuang Z, Wang CX, Shi JX. Amelioration of oxidative stress and protection against early brain injury by astaxanthin after experimental subarachnoid hemorrhage. J Neurosurg 2014; 121:42-54. [PMID: 24724856 DOI: 10.3171/2014.2.jns13730] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
UNLABELLED OBJECT.: Aneurysmal subarachnoid hemorrhage (SAH) causes devastating rates of mortality and morbidity. Accumulating studies indicate that early brain injury (EBI) greatly contributes to poor outcomes after SAH and that oxidative stress plays an important role in the development of EBI following SAH. Astaxanthin (ATX), one of the most common carotenoids, has a powerful antioxidative property. However, the potential role of ATX in protecting against EBI after SAH remains obscure. The goal of this study was to assess whether ATX can attenuate SAH-induced brain edema, blood-brain barrier permeability, neural cell death, and neurological deficits, and to elucidate whether the mechanisms of ATX against EBI are related to its powerful antioxidant property. METHODS Two experimental SAH models were established, including a prechiasmatic cistern SAH model in rats and a one-hemorrhage SAH model in rabbits. Both intracerebroventricular injection and oral administration of ATX were evaluated in this experiment. Posttreatment assessments included neurological scores, body weight loss, brain edema, Evans blue extravasation, Western blot analysis, histopathological study, and biochemical estimation. RESULTS It was observed that an ATX intracerebroventricular injection 30 minutes post-SAH could significantly attenuate EBI (including brain edema, blood-brain barrier disruption, neural cell apoptosis, and neurological dysfunction) after SAH in rats. Meanwhile, delayed treatment with ATX 3 hours post-SAH by oral administration was also neuroprotective in both rats and rabbits. In addition, the authors found that ATX treatment could prevent oxidative damage and upregulate the endogenous antioxidant levels in the rat cerebral cortex following SAH. CONCLUSIONS These results suggest that ATX administration could alleviate EBI after SAH, potentially through its powerful antioxidant property. The authors conclude that ATX might be a promising therapeutic agent for EBI following SAH.
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Affiliation(s)
- Xiang-Sheng Zhang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Second Military Medical University, Shanghai, China; and
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Zhou XM, Zhou ML, Zhang XS, Zhuang Z, Li T, Shi JX, Zhang X. Resveratrol prevents neuronal apoptosis in an early brain injury model. J Surg Res 2014; 189:159-65. [PMID: 24602480 DOI: 10.1016/j.jss.2014.01.062] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 01/29/2014] [Accepted: 01/31/2014] [Indexed: 10/25/2022]
Abstract
BACKGROUND Resveratrol has been shown to attenuate cerebral vasospasm after subarachnoid hemorrhage (SAH); however, no study has explored its neuroprotective effect in early brain injury (EBI) after experimental SAH. The aim of this study was to evaluate the antiapoptotic function of resveratrol in EBI and its relationship with the PI3K/Akt survival pathway. METHODS Experimental SAH was induced in adult male rats by prechiasmatic cistern injection. Control and SAH rats were divided into six groups and treated with low (20 mg/kg) or high (60 mg/kg) concentrations of resveratrol with or without LY294002 cotreatment. Brain samples of the rats were analyzed by immunohistochemistry, immunofluorescence staining, Western blotting, and terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) apoptosis assays. RESULTS High-concentration but not low-concentration resveratrol treatment in SAH rats led to a significant increase in phosphorylated Akt (p-Akt) protein levels compared with SAH rats without treatment. In addition, p-Akt-positive cells mainly colocalized with NeuN-positive cells. Neuronal apoptosis in SAH rat brain was attenuated by high-concentration resveratrol treatment. The antiapoptotic effect of resveratrol in SAH rats could be partially abrogated by the PI3K/Akt signaling inhibitor LY294002. CONCLUSIONS Our results show that resveratrol has an antiapoptotic effect in EBI and that resveratrol might act through the PI3K/Akt signaling pathway.
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Affiliation(s)
- Xiao-Ming Zhou
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Second Military Medical University, Shanghai, China
| | - Meng-Liang Zhou
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China.
| | - Xiang-Sheng Zhang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Second Military Medical University, Shanghai, China
| | - Zong Zhuang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
| | - Tao Li
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
| | - Ji-Xin Shi
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
| | - Xin Zhang
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Second Military Medical University, Shanghai, China; Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China.
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Zhou XM, Zhang X, Zhang XS, Zhuang Z, Li W, Sun Q, Li T, Wang CX, Zhu L, Shi JX, Zhou ML. SIRT1 inhibition by sirtinol aggravates brain edema after experimental subarachnoid hemorrhage. J Neurosci Res 2014; 92:714-22. [PMID: 24482345 DOI: 10.1002/jnr.23359] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Revised: 12/01/2013] [Accepted: 12/11/2013] [Indexed: 11/11/2022]
Abstract
Secondary brain injury following subarachnoid hemorrhage (SAH) is poorly understood. We utilized a rat model of SAH to investigate whether SIRT1 has a protective role against brain edema via the tumor suppressor protein p53 pathway. Experimental SAH was induced in adult male Sprague-Dawley rats by prechiasmatic cistern injection. Brain SIRT1 protein levels were examined in the sham controls and in rats 6, 12, 24, 48, and 72 hr after SAH induction. The SIRT1 inhibitor sirtinol was administered by intracerebroventricular infusion. Neurological functions, blood-brain barrier (BBB) disruption, and brain water content were assessed. Endothelial cell apoptosis, caspase 3 protein expression, p53 acetylation, and matrix metalloproteinase-9 (MMP-9) activity were examined. Compared with the control, SIRT1 protein expression increased remarkably, reaching a maximum at 24 hr after SAH. Sirtinol treatment significantly lowered SIRT1 expression, accompanied by deteriorated neurologic function, BBB disruption, brain edema, increased endothelial cell apoptosis, and increased MMP-9 gelatinase activity compared with the rats treated with vehicle only. Our results suggest that increased expression of endogenous SIRT1 may play a neuroprotective role against brain edema after SAH.
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Affiliation(s)
- Xiao-Ming Zhou
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Second Military Medical University, Shanghai, China
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Hu YC, Wang F, Zhang DD, Sun Q, Li W, Dai YX, Zhou ML, Hang CH. Expression of intestinal CD40 after experimental traumatic brain injury in rats. J Surg Res 2013; 184:1022-7. [DOI: 10.1016/j.jss.2013.04.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2012] [Revised: 03/23/2013] [Accepted: 04/04/2013] [Indexed: 10/26/2022]
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Liu HD, Li W, Chen ZR, Hu YC, Zhang DD, Shen W, Zhou ML, Zhu L, Hang CH. Expression of the NLRP3 inflammasome in cerebral cortex after traumatic brain injury in a rat model. Neurochem Res 2013; 38:2072-83. [PMID: 23892989 DOI: 10.1007/s11064-013-1115-z] [Citation(s) in RCA: 206] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Revised: 07/11/2013] [Accepted: 07/17/2013] [Indexed: 12/15/2022]
Abstract
Inflammatory response plays an important role in the pathogenesis of secondary damage after traumatic brain injury (TBI). The inflammasome is a multiprotein complex involved in innate immunity and a number of studies have suggested that the inflammasome plays a critical role in a host inflammatory signaling. Nucleotide-binding domain, leucine-rich repeat, pyrin domain containing 3 (NLRP3) is a key component of the NLRP3-inflammasome, which also includes apoptotic speck-containing protein (ASC) with a cysteine protease (caspase)-activating recruitment domain and pro-caspase1. Activation of the NLRP3-inflammasome causes the processing and release of the interleukin 1 beta (IL-1β) and interleukin 18 (IL-18). Based on this, we hypothesized that the NLRP3-inflammasome could participate in the inflammatory response following TBI. However, the expression of NLRP3-inflammasome in cerebral cortex after TBI is not well known. Rats were randomly divided into control, sham and TBI groups (including 6 h, 1 day, 3 day and 7 day sub-group). TBI model was induced, and animals were sacrificed at each time point respectively. The expression of NLRP3-inflammasome was measured by quantitative real-time polymerase chain reaction, western blot and immunohistochemistry respectively. Immunofluorescent double labeling was performed to identify the cell types of NLRP3-inflammasome's expression. Moreover, enzyme linked immunosorbent assay was used to detect the alterations of IL-1β and IL-18 at each time point post-injury. The results showed that, TBI could induce assembly of NLRP3-inflammasome complex, increased expression of ASC, activation of caspase1, and processing of IL-1β and IL-18. These results suggested that NLRP3-inflammasome might play an important role in the inflammation induced by TBI and could be a target for TBI therapy.
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Affiliation(s)
- Huan-Dong Liu
- Department of Neurosurgery, School of Medicine, Jinling Hospital, Southern Medical University (Guangzhou), 305 East Zhongshan Road, Nanjing, 210002, Jiangsu Province, People's Republic of China
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Li W, Ling HP, You WC, Liu HD, Sun Q, Zhou ML, Shen W, Zhao JB, Zhu L, Hang CH. Elevated Cerebral Cortical CD24 Levels in Patients and Mice with Traumatic Brain Injury: A Potential Negative Role in Nuclear Factor Kappa B/Inflammatory Factor Pathway. Mol Neurobiol 2013; 49:187-98. [DOI: 10.1007/s12035-013-8509-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Accepted: 07/08/2013] [Indexed: 01/28/2023]
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Li W, Liu HD, You WC, Zhou ML, Ling HP, Shen W, Zhu L, Hang CH. Enhanced cortical expression of myeloid differentiation primary response protein 88 (Myd88) in patients with traumatic brain injury. J Surg Res 2013. [DOI: 10.1016/j.jss.2012.10.928] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Han BH, Vellimana AK, Zhou ML, Milner E, Zipfel GJ. Phosphodiesterase 5 inhibition attenuates cerebral vasospasm and improves functional recovery after experimental subarachnoid hemorrhage. Neurosurgery 2012; 70:178-86; discussion 186-7. [PMID: 21796010 DOI: 10.1227/neu.0b013e31822ec2b0] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Cerebral vasospasm is an independent predictor of poor outcome after subarachnoid hemorrhage (SAH). The nitric oxide-cyclic guanosine monophosphate (NO-cGMP) vasodilatory pathway is strongly implicated in its pathophysiology. Preliminary studies suggest that phosphodiesterase 5 (PDE5), an enzyme that degrades cGMP, may play a role because the PDE5 inhibitor sildenafil was found to reduce vasospasm after SAH. However, several questions that are critical when considering translational studies remain unanswered. OBJECTIVE To elucidate the mechanism of action of sildenafil against vasospasm and to assess whether sildenafil attenuates SAH-induced neuronal cell death, improves functional outcome after SAH, or causes significant physiological side effects when administered at therapeutically relevant doses. METHODS SAH was induced via endovascular perforation in male C57BL6 mice. Beginning 2 hours later, mice received sildenafil citrate (0.7, 2 or 5 mg/kg orally twice daily) or vehicle. Neurological outcome was assessed daily. Vasospasm was determined on post-SAH day 3. Brain PDE5 expression and activity, cGMP content, neuronal cell death, arterial blood pressure, and intracranial pressure were examined. RESULTS We found that PDE5 activity (but not expression) is increased after SAH, leading to decreased cGMP levels. Sildenafil attenuates this increase in PDE5 activity and restores cGMP levels after SAH. Post-SAH initiation of sildenafil was found to decrease vasospasm and neuronal cell death and markedly improve neurological outcome without causing significant physiological side effects. CONCLUSION Sildenafil, a US Food and Drug Administration-approved drug with a proven track record of safety in humans, is a promising new therapy for vasospasm and neurological deficits after SAH.
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Affiliation(s)
- Byung Hee Han
- Department of Neurological Surgery, Washington University School of Medicine, St. Louis, Missouri 63110, USA
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