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Li HP, Cheng HL, Ding K, Zhang Y, Gao F, Zhu G, Zhang Z. New recognition of the heart-brain axis and its implication in the pathogenesis and treatment of PTSD. Eur J Neurosci 2024. [PMID: 39044332 DOI: 10.1111/ejn.16445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Accepted: 06/04/2024] [Indexed: 07/25/2024]
Abstract
Post-traumatic stress disorder (PTSD) is a complex psychological disorder provoked by distressing experiences, and it remains without highly effective intervention strategies. The exploration of PTSD's underlying mechanisms is crucial for advancing diagnostic and therapeutic approaches. Current studies primarily explore PTSD through the lens of the central nervous system, investigating concrete molecular alterations in the cerebral area and neural circuit irregularities. However, the body's response to external stressors, particularly the changes in cardiovascular function, is often pronounced, evidenced by notable cardiac dysfunction. Consequently, examining PTSD with a focus on cardiac function is vital for the early prevention and targeted management of the disorder. This review undertakes a comprehensive literature analysis to detail the alterations in brain and heart structures and functions associated with PTSD. It also synthesizes potential mechanisms of heart-brain axis interactions relevant to the development of PTSD. Ultimately, by considering cardiac function, this review proposes novel perspectives for PTSD's prophylaxis and therapy.
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Affiliation(s)
- Hai-Peng Li
- Anhui University of Chinese Medicine, Hefei, China
| | - Hong-Liang Cheng
- The Affiliated Hospital of Acupuncture and Moxibustion, Anhui University of Chinese Medicine, Hefei, Anhui Province, China
| | - Keke Ding
- Anhui University of Chinese Medicine, Hefei, China
| | - Yang Zhang
- Anhui University of Chinese Medicine, Hefei, China
| | - Fang Gao
- Anhui University of Chinese Medicine, Hefei, China
| | - Guoqi Zhu
- Anhui University of Chinese Medicine, Hefei, China
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Guo YS, Bi X. Enriched environment enhanced the astrocyte-derived BDNF and VEGF expression and alleviate white matter injuries of rats with ischemic stroke. Neurol Res 2024; 46:272-283. [PMID: 38145566 DOI: 10.1080/01616412.2023.2298136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 12/17/2023] [Indexed: 12/27/2023]
Abstract
OBJECTIVES Numerous studies have shown that an enriched environment can promote ischemic stroke and improve cognitive function. In addition, white matter is closely related to cognitive function. The effects and mechanisms of the enriched environment on white matter recovery after stroke have not been elucidated. This study will analyse the effects of the enriched environment on white matter and cognitive function in the post-stroke brain from the perspective of astrocytes and their secretions. METHODS Stroke models were used for middle cerebral artery occlusion model. post-operative rats were divided into sham-operated, standard and enriched environment groups. The degree of cerebral infarction was assessed by TTC staining and the degree of white matter damage was assessed by Luxol-Fast Blue staining. The prognosis after stroke was assessed using the longa score and Morris water maze test. Western Blot and immunofluorescence were used to quantify and localize astrocytes and their associated secretory factors and myelin protein markers. RESULTS We found that ischemic stroke can cause severe demyelination. After EE treatment, there was a significant increase in cerebral remyelination and a significant improvement in neurological and cognitive functions. Astrocyte, BDNF, and VEGF expression were significantly higher than in rats in the standard circumstances of stroke model. CONCLUSION These data suggest that the enriched environment contributes to brain white matter recovery and improvement of cognitive function after stroke. The mechanism is related to astrocytes and their secretions. EE can activate astrocytes to secrete BDNF and VEGF, which may be crucial to promote white matter recovery.
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Affiliation(s)
- Yi-Sha Guo
- Department of Physical Therapy, Affiliated Yangzhi Rehabilitation Hospital of Tongji University, Shanghai, China
- Department of rehabilitation medicine, Shanghai University of Medicine & Health Sciences Affiliated Zhoupu Hospital, Shanghai, China
| | - Xia Bi
- Department of rehabilitation medicine, Shanghai University of Medicine & Health Sciences Affiliated Zhoupu Hospital, Shanghai, China
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Sekhon MS, Stukas S, Hirsch-Reinshagen V, Thiara S, Schoenthal T, Tymko M, McNagny KM, Wellington C, Hoiland R. Neuroinflammation and the immune system in hypoxic ischaemic brain injury pathophysiology after cardiac arrest. J Physiol 2023. [PMID: 37639379 DOI: 10.1113/jp284588] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Accepted: 08/15/2023] [Indexed: 08/31/2023] Open
Abstract
Hypoxic ischaemic brain injury after resuscitation from cardiac arrest is associated with dismal clinical outcomes. To date, most clinical interventions have been geared towards the restoration of cerebral oxygen delivery after resuscitation; however, outcomes in clinical trials are disappointing. Therefore, alternative disease mechanism(s) are likely to be at play, of which the response of the innate immune system to sterile injured tissue in vivo after reperfusion has garnered significant interest. The innate immune system is composed of three pillars: (i) cytokines and signalling molecules; (ii) leucocyte migration and activation; and (iii) the complement cascade. In animal models of hypoxic ischaemic brain injury, pro-inflammatory cytokines are central to propagation of the response of the innate immune system to cerebral ischaemia-reperfusion. In particular, interleukin-1 beta and downstream signalling can result in direct neural injury that culminates in cell death, termed pyroptosis. Leucocyte chemotaxis and activation are central to the in vivo response to cerebral ischaemia-reperfusion. Both parenchymal microglial activation and possible infiltration of peripherally circulating monocytes might account for exacerbation of an immunopathological response in humans. Finally, activation of the complement cascade intersects with multiple aspects of the innate immune response by facilitating leucocyte activation, further cytokine release and endothelial activation. To date, large studies of immunomodulatory therapies have not been conducted; however, lessons learned from historical studies using therapeutic hypothermia in humans suggest that quelling an immunopathological response might be efficacious. Future work should delineate the precise pathways involved in vivo in humans to target specific signalling molecules.
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Affiliation(s)
- Mypinder S Sekhon
- Division of Critical Care Medicine, Department of Medicine, Vancouver General Hospital, University of British Columbia, Vancouver, BC, Canada
- Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
- International Centre for Repair Discoveries, University of British Columbia, Vancouver, BC, Canada
- Collaborative Entity for REsearching BRain Ischemia (CEREBRI), University of British Columbia, Vancouver, BC, Canada
| | - Sophie Stukas
- Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
- Collaborative Entity for REsearching BRain Ischemia (CEREBRI), University of British Columbia, Vancouver, BC, Canada
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Veronica Hirsch-Reinshagen
- Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
- International Centre for Repair Discoveries, University of British Columbia, Vancouver, BC, Canada
- Collaborative Entity for REsearching BRain Ischemia (CEREBRI), University of British Columbia, Vancouver, BC, Canada
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Sonny Thiara
- Division of Critical Care Medicine, Department of Medicine, Vancouver General Hospital, University of British Columbia, Vancouver, BC, Canada
- Collaborative Entity for REsearching BRain Ischemia (CEREBRI), University of British Columbia, Vancouver, BC, Canada
| | - Tison Schoenthal
- Division of Critical Care Medicine, Department of Medicine, Vancouver General Hospital, University of British Columbia, Vancouver, BC, Canada
- Collaborative Entity for REsearching BRain Ischemia (CEREBRI), University of British Columbia, Vancouver, BC, Canada
| | - Michael Tymko
- Division of Critical Care Medicine, Department of Medicine, Vancouver General Hospital, University of British Columbia, Vancouver, BC, Canada
- Collaborative Entity for REsearching BRain Ischemia (CEREBRI), University of British Columbia, Vancouver, BC, Canada
| | - Kelly M McNagny
- Department of Medical Genetics, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
- Biomedical Research Centre, University of British Columbia, Vancouver, BC, Canada
| | - Cheryl Wellington
- Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
- International Centre for Repair Discoveries, University of British Columbia, Vancouver, BC, Canada
- Collaborative Entity for REsearching BRain Ischemia (CEREBRI), University of British Columbia, Vancouver, BC, Canada
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Ryan Hoiland
- Division of Critical Care Medicine, Department of Medicine, Vancouver General Hospital, University of British Columbia, Vancouver, BC, Canada
- Collaborative Entity for REsearching BRain Ischemia (CEREBRI), University of British Columbia, Vancouver, BC, Canada
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Ramakrishna K, Krishnamurthy S. Indole-3-carbinol ameliorated the neurodevelopmental deficits in neonatal anoxic injury in rats. Int J Dev Neurosci 2023; 83:31-43. [PMID: 36259087 DOI: 10.1002/jdn.10234] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 10/01/2022] [Accepted: 10/13/2022] [Indexed: 02/04/2023] Open
Abstract
Neonatal anoxia is linked to long-lasting neurodevelopmental deficits. Due to the lack of pharmacological intervention to treat neonatal anoxia, there is interest in finding new molecules for its treatment. Indole-3-carbinol (I3C) has shown neuroprotective effects in some disease conditions. However, the neuroprotective role of I3C in neonatal anoxia has not been explored. Consequently, we have investigated the effect of I3C on neonatal anoxia-induced brain injury and neurodevelopmental deficits. Rat pups after 30 h of birth were subjected to two episodes of anoxia (10 min in each) at a time interval of 24 h by flowing 100% nitrogen. I3C was administered within 30 min of the second episode of anoxia on a postnatal day (PND) 3 and continued for PND 9. Neurodevelopmental deficits, cortical mitochondrial membrane potential (MMP), opening of mitochondrial permeability transition pore (MPTP), electron transport chain (ETC) enzyme activities, oxidative stress, hypoxia-inducible factor-1α (HIF-1α) levels, histopathological changes, and apoptosis were measured. I3C treatment dose-dependently ameliorated the neurodevelopmental deficits and somatic growth in anoxic pups. I3C improved mitochondrial function by enhancing the MMP, mitochondrial ETC enzymes, and antioxidants. It blocked the MPTP opening and release of cytochrome C in anoxic pups. Further, I3C reduced the elevated cortical HIF-1α in neonatal anoxic pups. Furthermore, I3C ameliorated histopathological abnormalities and mitochondrial-mediated apoptotic indicators Cyt C, caspase-9, and caspase-3. Our study concludes that I3C improved neuronal development in anoxic pups by enhancing mitochondrial function, reducing HIF-1α, and mitigating apoptosis.
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Affiliation(s)
- Kakarla Ramakrishna
- Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology, Banaras Hindu University (IIT BHU), Varanasi, India.,Department of Pharmacy, Koneru Lakshmaiah Education Foundation, Vaddeswaram, India
| | - Sairam Krishnamurthy
- Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology, Banaras Hindu University (IIT BHU), Varanasi, India
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Yang DG, Gao YY, Yin ZQ, Wang XR, Meng XS, Zou TF, Duan YJ, Chen YL, Liao CZ, Xie ZL, Fan XD, Sun L, Han JH, Yang XX. Roxadustat alleviates nitroglycerin-induced migraine in mice by regulating HIF-1α/NF-κB/inflammation pathway. Acta Pharmacol Sin 2023; 44:308-320. [PMID: 35948752 PMCID: PMC9889379 DOI: 10.1038/s41401-022-00941-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 06/08/2022] [Indexed: 02/04/2023] Open
Abstract
Sensitization of central pain and inflammatory pathways play essential roles in migraine, a primary neurobiological headache disorder. Since hypoxia-inducible factor-1α (HIF-1α) is implicated in neuroprotection and inflammation inhibition, herein we investigated the role of HIF-1α in migraine. A chronic migraine model was established in mice by repeated injection of nitroglycerin (10 mg/kg, i.p.) every other day for 5 total injections. In the prevention and acute experiments, roxadustat, a HIF-1α stabilizer, was orally administered starting before or after nitroglycerin injection, respectively. Pressure application measurement, and tail flick and light-aversive behaviour tests were performed to determine the pressure pain threshold, thermal nociceptive sensitivity and migraine-related light sensitivity. At the end of experiments, mouse serum samples and brain tissues were collected for analyses. We showed that roxadustat administration significantly attenuated nitroglycerin-induced basal hypersensitivity and acute hyperalgesia by improving central sensitization. Roxadustat administration also decreased inflammatory cytokine levels in serum and trigeminal nucleus caudalis (TNC) through NF-κB pathway. Consistent with the in vivo results showing that roxadustat inhibited microglia activation, roxadustat (2, 10, and 20 μM) dose-dependently reduced ROS generation and inflammation in LPS-stimulated BV-2 cells, a mouse microglia cell line, by inhibiting HIF-1α/NF-κB pathway. Taken together, this study demonstrates that roxadustat administration ameliorates migraine-like behaviours and inhibits central pain sensitization in nitroglycerin-injected mice, which is mainly mediated by HIF-1α/NF-κB/inflammation pathway, suggesting the potential of HIF-1α activators as therapeutics for migraine.
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Affiliation(s)
- Dai-Gang Yang
- Key Laboratory of Metabolism and Regulation for Major Diseases of Anhui Higher Education Institutes, College of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Yong-Yao Gao
- Key Laboratory of Metabolism and Regulation for Major Diseases of Anhui Higher Education Institutes, College of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Ze-Qun Yin
- Key Laboratory of Metabolism and Regulation for Major Diseases of Anhui Higher Education Institutes, College of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Xue-Rui Wang
- Key Laboratory of Metabolism and Regulation for Major Diseases of Anhui Higher Education Institutes, College of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Xian-She Meng
- Key Laboratory of Metabolism and Regulation for Major Diseases of Anhui Higher Education Institutes, College of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Ting-Feng Zou
- Key Laboratory of Metabolism and Regulation for Major Diseases of Anhui Higher Education Institutes, College of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Ya-Jun Duan
- Key Laboratory of Metabolism and Regulation for Major Diseases of Anhui Higher Education Institutes, College of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Yuan-Li Chen
- Key Laboratory of Metabolism and Regulation for Major Diseases of Anhui Higher Education Institutes, College of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Chen-Zhong Liao
- Key Laboratory of Metabolism and Regulation for Major Diseases of Anhui Higher Education Institutes, College of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Zhou-Ling Xie
- Key Laboratory of Metabolism and Regulation for Major Diseases of Anhui Higher Education Institutes, College of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Xiao-Dong Fan
- Department of General Gynecology, Tianjin Central Hospital of Gynecology and Obstetrics/Tianjin Key Laboratory of Human Development and Reproductive Regulation, Tianjin, 300100, China
| | - Lu Sun
- Department of General Gynecology, Tianjin Central Hospital of Gynecology and Obstetrics/Tianjin Key Laboratory of Human Development and Reproductive Regulation, Tianjin, 300100, China
| | - Ji-Hong Han
- Key Laboratory of Metabolism and Regulation for Major Diseases of Anhui Higher Education Institutes, College of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China.
- College of Life Sciences, Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Bioactive Materials of Ministry of Education, Nankai University, Tianjin, 300071, China.
| | - Xiao-Xiao Yang
- Key Laboratory of Metabolism and Regulation for Major Diseases of Anhui Higher Education Institutes, College of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China.
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Xu T, Jiang Y, Hu X, Yang G, Chen Y, Zhang S, Zhang Q, Zheng L, Xie HQ, Xu L, Zhao B. Effects of the emerging contaminant 1,3,6,8-tetrabromocarbazole on the NF-κB and correlated mechanism in human hepatocellular carcinoma cells. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 247:114199. [PMID: 36274317 DOI: 10.1016/j.ecoenv.2022.114199] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 10/05/2022] [Accepted: 10/15/2022] [Indexed: 06/16/2023]
Abstract
1,3,6,8-Tetrabromocarbazole (1368-BCZ) is identified as an emerging contaminant that exerts angiogenic effects. Multiple studies indicated there was a positive correlation between angiogenesis and nuclear factor kappa B (NF-κB) activation. While the role of NF-κB in inflammation and apoptosis has been well known, the potential biological effects of 1368-BCZ on NF-κB signaling and related mechanism remain unclear. We, therefore, explored the possible effects of 1368-BCZ on the NF-κB pathway at the gene and protein levels and confirmed that NF-κB activation by 1368-BCZ exposure caused an augmented phosphorylated protein level, induction of NF-κB response element (κBRE)-driven luciferase activity and upregulation of transcriptional level of downstream responsive genes. Although 1368-BCZ did not produce detectable changes in hepatic fibrosis in vivo, it obviously altered the apoptosis in human hepatocellular carcinoma (HepG2) cells. Furthermore, the induction of apoptosis was confirmed by the increased cleaved caspase-3 level. These data revealed the activating effects of 1368-BCZ on NF-κB and its involvement in the underlying mechanisms, providing additional information for toxicology studies of emerging contaminants and introducing a mechanism-based toxicological evaluation of emerging pollutants.
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Affiliation(s)
- Tong Xu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yu Jiang
- Department of Preventive Medicine, Fujian Provincial Key Laboratory of Environment Factors and Cancer, Key Laboratory of Environment and Health, School of Public Health, Fujian Medical University, Fuzhou 350122, China
| | - Xiaoxu Hu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guanglei Yang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yangsheng Chen
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Songyan Zhang
- Engineering Laboratory of Shenzhen Natural Small Molecule Innovative Drugs, Health Science Center, Shenzhen University, Shenzhen 518060, China
| | - Qian Zhang
- Department of Cardiology, Beijing Hospital, National Center of Gerontology, Beijing 100730, China
| | - Liping Zheng
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Heidi Qunhui Xie
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Li Xu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Bin Zhao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China; School of environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
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Insight into the Effects of High-Altitude Hypoxic Exposure on Learning and Memory. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:4163188. [PMID: 36160703 PMCID: PMC9492407 DOI: 10.1155/2022/4163188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 08/22/2022] [Indexed: 02/05/2023]
Abstract
The earth land area is heterogeneous in terms of elevation; about 45% of its land area belongs to higher elevation with altitude above 500 meters compared to sea level. In most cases, oxygen concentration decreases as altitude increases. Thus, high-altitude hypoxic stress is commonly faced by residents in areas with an average elevation exceeding 2500 meters and those who have just entered the plateau. High-altitude hypoxia significantly affects advanced neurobehaviors including learning and memory (L&M). Hippocampus, the integration center of L&M, could be the most crucial target affected by high-altitude hypoxia exposure. Based on these points, this review thoroughly discussed the relationship between high-altitude hypoxia and L&M impairment, in terms of hippocampal neuron apoptosis and dysfunction, neuronal oxidative stress disorder, neurotransmitters and related receptors, and nerve cell energy metabolism disorder, which is of great significance to find potential targets for medical intervention. Studies illustrate that the mechanism of L&M damaged by high-altitude hypoxia should be further investigated based on the entire review of issues related to this topic.
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Impact of Berberine on Some Epigenetic, Transcription Regulation and Inflammatory Biomarkers in a Mice Model of Epilepsy. Rep Biochem Mol Biol 2022; 10:362-372. [PMID: 34981012 DOI: 10.52547/rbmb.10.3.362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Accepted: 03/15/2021] [Indexed: 11/18/2022]
Abstract
Background Epilepsy is one of the most widespread neurological disease worldwide. Status epilepticus (SE) is a life-threatening neurologic disorder. Neuroprotective approaches are increasingly to discover a promising therapy to manage epileptic disorders. This study aimed to assess the impact of berberine on some epigenetic, transcription regulation & inflammatory biomarkers in a mice model of epilepsy. Methods This work was performed on; Group I: (control), Group II: berberine-treated control,Group III: epilepsy group, Group IV: berberine-treated epilepsy. Groups were subjected to assessment of Tumor growth factor-1β (TGF-1β), hypoxia inducible factor-1α (HIF-1α), brain derived neurotrophic factor (BDNF) levels, histone deacetylase (HDAC) activity & neuronal restrictive silencing factor (NRSF) gene expression. Results Study showed significant increase in levels of HIF-1α, TGF-1β, HDAC activity & NRSF gene expression in epilepsy group & decrease in these levels in berberine treated epilepsy group. Significant decrease in BDNF levels in epilepsy & elevation in them in berberine treated epilepsy group. Conclusion Our study showed the anti-epileptic impact of berberine via its regulatory effect on some epigenetic, transcription factors & inflammatory biomarkers in a mice model of epilepsy.
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Ji K, Li Z, Lei Y, Xu W, Ouyang L, He T, Xing Y. Resveratrol attenuates retinal ganglion cell loss in a mouse model of retinal ischemia reperfusion injury via multiple pathways. Exp Eye Res 2021; 209:108683. [PMID: 34181937 DOI: 10.1016/j.exer.2021.108683] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 05/18/2021] [Accepted: 06/21/2021] [Indexed: 01/30/2023]
Abstract
BACKGROUND Resveratrol (RES) is a natural polyphenol that has been shown to protect retinal ganglion cells (RGCs) following retinal ischemia reperfusion (I/R) injury. However, the molecular mechanisms of resveratrol function are yet to be fully elucidated. Thus, this study explored the potential mechanisms of resveratrol in vivo. METHODS A retinal ischemia reperfusion injury model was established in adult male C57BL/6 J mice. Intraperitoneal injection of resveratrol was administered continuously for 5 days. RGC survival was determined by immunofluorescence staining with Brn3a. Flash electroretinography (ERG) was conducted to assess visual function. Proteins of HIF-1a, VEGF, p38, p53, PI3K, Akt, Bax, Bcl2, and Cleaved Caspase3 were detected using Western blot. RESULTS RES administration significantly ameliorated retinal thickness damage and increased Brn3a stained RGCs 7 days after I/R injury. We also found that administration of RES remarkably inhibited the upregulation of mitochondrial apoptosis-related protein Bax and Cleaved Caspase3, as well as increased the expression of Bcl2. Furthermore, RES administration significantly suppressed the I/R injury-induced upregulation of the HIF-1a/VEGF and p38/p53 pathways, while activating the I/R injury-induced downregulation of the PI3K/Akt pathway. Moreover, RES administration remarkably improved retinal function after I/R injury-induced functional impairment. CONCLUSIONS Our data demonstrated that resveratrol can mitigate retinal ischemic injury induced RGC loss and retinal function impairment by inhibiting the HIF-1a/VEGF and p38/p53 pathways while activating the PI3K/Akt pathway. Therefore, our results further reinforce that resveratrol has potential for treating glaucoma.
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Affiliation(s)
- Kaibao Ji
- Department of Ophthalmology, Renmin Hospital of Wuhan University, Hubei, China
| | - Zongyuan Li
- Department of Ophthalmology, Renmin Hospital of Wuhan University, Hubei, China
| | - Yiming Lei
- Nanchang University School of Ophthalmology & Optometry, Nanchang, China
| | - Wanxin Xu
- Department of Clinical Laboratory, Jingdezhen Second People's Hospital, Jiangxi, China
| | - Lingyi Ouyang
- Department of Ophthalmology, Renmin Hospital of Wuhan University, Hubei, China
| | - Tao He
- Department of Ophthalmology, Renmin Hospital of Wuhan University, Hubei, China.
| | - Yiqiao Xing
- Department of Ophthalmology, Renmin Hospital of Wuhan University, Hubei, China.
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Zheng Y, Zhang J, Zhao Y, Zhang Y, Zhang X, Guan J, Liu Y, Fu J. Curcumin protects against cognitive impairments in a rat model of chronic cerebral hypoperfusion combined with diabetes mellitus by suppressing neuroinflammation, apoptosis, and pyroptosis. Int Immunopharmacol 2021; 93:107422. [PMID: 33548579 DOI: 10.1016/j.intimp.2021.107422] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/12/2021] [Accepted: 01/19/2021] [Indexed: 12/17/2022]
Abstract
BACKGROUND Chronic cerebral hypoperfusion (CCH) is regarded as a high-risk factor for cognitive decline in vascular dementia (VaD). We have previously shown that diabetes mellitus (DM) synergistically promotes CCH-induced cognitive dysfunction via exacerbating neuroinflammation. Furthermore, curcumin has been shown to exhibit anti-inflammatory and neuroprotective activities. However, the effects of curcumin on CCH-induced cognitive impairments in DM have remained unknown. METHODS Rats were fed with a high-fat diet (HFD) and injected with low-dose streptozotocin (STZ), followed by bilateral common carotid artery occlusion (BCCAO), to model DM and CCH in vivo. After BCCAO, curcumin (50 mg/kg) was administered intraperitoneally every two days for eight weeks to evaluate its therapeutic effects. Additionally, mouse BV2 microglial cells were exposed to hypoxia and high glucose to model CCH and DM pathologies in vitro. RESULTS Curcumin treatment significantly improved DM/CCH-induced cognitive deficits and attenuated neuronal cell death. Molecular analysis revealed that curcumin exerted protective effects via suppressing neuroinflammation induced by microglial activation, regulating the triggering receptor expressed on myeloid cells 2 (TREM2)/toll-like receptor 4 (TLR4)/nuclear factor-κB (NF-κB) pathway, alleviating apoptosis, and reducing nod-like receptor protein 3 (NLRP3)-dependent pyroptosis. CONCLUSIONS Taken together, our findings suggest that curcumin represents a promising therapy for DM/CCH-induced cognitive impairments.
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Affiliation(s)
- Yaling Zheng
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, China
| | - Jiawei Zhang
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, China
| | - Yao Zhao
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, China
| | - Yaxuan Zhang
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, China
| | - Xiaojie Zhang
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, China
| | - Jian Guan
- Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Yu Liu
- Department of Medicine, Shanghai Eighth People's Hospital, Shanghai 200235, China
| | - Jianliang Fu
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, China; Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.
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Liu Z, Tian Z, Lv J, Liu W, Ma Y, Hu M, Huang M. Mechanism in bradycardia induced by Trimethyltin chloride: Inhibition activity and expression of Na +/K +-ATPase and apoptosis in myocardia. J Toxicol Sci 2020; 45:549-558. [PMID: 32879254 DOI: 10.2131/jts.45.549] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Trimethyltin chloride (TMT) is a stabilizer by-product in the process of manufacturing plastic, which is a kind of very strong toxic substance, and has acute, cumulative and chronic toxicity. TMT may cause bradycardia in patients with occupational poisoning, the mechanism of which has not been reported. This study explored the mechanism of TMT resulting in bradycardia of C57BL/6 mice. TMT was administered to mice to measure heart rate, serum succinate dehydrogenase (SDH) level, and myocardial Na+/K+-ATPase activity and expression. The effects of TMT on myocardial apoptosis were observed by changing the expressions of caspase-3, Bax and Bcl-2 in myocardium. It was found that the heart rate and SDH activity in serum of mice gradually decreased with the increase of TMT dose compared with the control group. The activity and the expression of Na+/K+-ATPase in the heart tissue of mice exposed to TMT was measured and gradually decreased with the increase of dose and time. We measured the expression of Bcl-2, Bax, caspase-3 and cleaved caspase-3 in the heart tissues of TMT exposed mice and found that the expressions of Bax, caspase-3 and cleaved caspase-3 increased and the expressions of Bcl-2 decreased in the heart tissues of the TMT-exposed mice at different doses. With the extension of TMT exposure time, the expression of Bax and caspase-3 increased and the expression of Bcl-2 decreased in the heart tissues of TMT exposed mice. Our findings suggest the mechanisms of TMT resulting in bradycardia may be associated with the inhibited activity and decreased content of Na+/K+-ATPase, thus further leading to the changes of Bcl-2, Bax, caspase-3 and cleaved caspase-3 in the mice's ventricular tissues.
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Affiliation(s)
- Zhenzhong Liu
- Department of Preventive Medicine, North Sichuan Medical College, China.,Innovative Platform of Basic Medical Sciences, School of Basic Medical Sciences, North Sichuan Medical College, China
| | - Zhiqiang Tian
- School of public health, Shanxi Medical University, China
| | - Jiaqi Lv
- Department of Preventive Medicine, North Sichuan Medical College, China
| | - Wenhu Liu
- School of pharmacy, North Sichuan Medical College, China
| | - Ying Ma
- Department of Preventive Medicine, North Sichuan Medical College, China
| | - Miancai Hu
- Department of Preventive Medicine, North Sichuan Medical College, China
| | - Ming Huang
- Guangdong Province Hospital for Occupational Disease Prevention and Treatment, China
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12
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Sun L, Ji S, Xing J. Inhibition of microRNA-155 Alleviates Neurological Dysfunction Following Transient Global Ischemia and Contribution of Neuroinflammation and Oxidative Stress in the Hippocampus. Curr Pharm Des 2020; 25:4310-4317. [PMID: 31556851 DOI: 10.2174/1381612825666190926162229] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 09/18/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND/AIMS Central pro-inflammatory cytokine (PIC) signal is involved in neurological deficits after transient global ischemia induced by cardiac arrest (CA). The present study was to examine the role of microRNA- 155 (miR-155) in regulating IL-1β, IL-6 and TNF-α in the hippocampus of rats with induction of CA. We further examined the levels of products of oxidative stress 8-isoprostaglandin F2α (8-iso PGF2α, indication of oxidative stress); and 8-hydroxy-2'-deoxyguanosine (8-OHdG, indication of protein oxidation) after cerebral inhibition of miR-155. METHODS CA was induced by asphyxia and followed by cardiopulmonary resuscitation in rats. ELISA and western blot analysis were used to determine the levels of PICs and products of oxidative stress; and the protein expression of NADPH oxidase (NOXs) in the hippocampus. In addition, neurological severity score and brain edema were examined to assess neurological functions. RESULTS We observed amplification of IL-1β, IL-6 and TNF-α along with 8-iso PGF2α and 8-OHdG in the hippocampus of CA rats. Cerebral administration of miR-155 inhibitor diminished upregulation of PICs in the hippocampus. This also attenuated products of oxidative stress and upregulation of NOX4. Notably, inhibition of miR-155 improved neurological severity score and brain edema and this was linked to signal pathways of PIC and oxidative stress. CONCLUSION We showed the significant role of blocking miR-155 signal in improving the neurological function in CA rats likely via inhibition of signal pathways of neuroinflammation and oxidative stress, suggesting that miR-155 may be a target in preventing and/or alleviating development of the impaired neurological functions during CA-evoked global cerebral ischemia.
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Affiliation(s)
- Lichao Sun
- Department of Emergency Medicine, The First Hospital of Jilin University, Changchun, Jilin 130021, China
| | - Shouqin Ji
- Jiutai District People's Hospital of Changchun, Changchun, Jilin 130500, China
| | - Jihong Xing
- Department of Emergency Medicine, The First Hospital of Jilin University, Changchun, Jilin 130021, China
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13
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Intracellular Neuroprotective Mechanisms in Neuron-Glial Networks Mediated by Glial Cell Line-Derived Neurotrophic Factor. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:1036907. [PMID: 31827666 PMCID: PMC6885812 DOI: 10.1155/2019/1036907] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 10/19/2019] [Indexed: 12/28/2022]
Abstract
Glial cell line-derived neurotrophic factor (GDNF) has a pronounced neuroprotective effect in various nervous system pathologies, including ischaemic brain damage and neurodegenerative diseases. In this work, we studied the effect of GDNF on the ultrastructure and functional activity of neuron-glial networks during acute hypoxic exposure, a key damaging factor in numerous brain pathologies. We analysed the molecular mechanisms most likely involved in the positive effects of GDNF. Hypoxia modelling was performed on day 14 of culturing primary hippocampal cells obtained from mouse embryos (E18). GDNF (1 ng/ml) was added to the culture medium 20 min before oxygen deprivation. Acute hypoxia-induced irreversible changes in the ultrastructure of neurons and astrocytes led to the loss of functional Сa2+ activity and neural network disruption. Destructive changes in the mitochondrial apparatus and its functional activity characterized by an increase in the basal oxygen consumption rate and respiratory chain complex II activity during decreased stimulated respiration intensity were observed 24 hours after hypoxic injury. At a concentration of 1 ng/ml, GDNF maintained the functional metabolic network activity in primary hippocampal cultures and preserved the structure of the synaptic apparatus and number of mature chemical synapses, confirming its neuroprotective effect. GDNF maintained the normal structure of mitochondria in neuronal outgrowth but not in the soma. Analysis of the possible GDNF mechanism revealed that RET kinase, a component of the receptor complex, and the PI3K/Akt pathway are crucial for the neuroprotective effect of GDNF. The current study also revealed the role of GDNF in the regulation of HIF-1α transcription factor expression under hypoxic conditions.
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14
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Pang L, Ji S, Xing J. Amiloride Alleviates Neurological Deficits Following Transient Global Ischemia and Engagement of Central IL-6 and TNF-α Signal. Curr Mol Med 2019; 19:597-604. [PMID: 31272354 DOI: 10.2174/1566524019666190704100444] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 06/04/2019] [Accepted: 06/17/2019] [Indexed: 12/11/2022]
Abstract
BACKGROUND Central pro-inflammatory cytokine (PIC) signal is involved in neurological deficits after transient global ischemia induced by cardiac arrest (CA). The present study was to examine if blocking acid sensing ion channels (ASICs) using amiloride in the Central Nervous System can alleviate neurological deficits after the induction of CA and further examine the participation of PIC signal in the hippocampus for the effects of amiloride. METHODS CA was induced by asphyxia and then cardiopulmonary resuscitation was performed in rats. Western blot analysis and ELISA were used to determine the protein expression of ASIC subunit ASIC1 in the hippocampus, and the levels of PICs. As noted, it is unlikely that this procedure is clinically used although amiloride and other pharmacological agents were given into the brain in this study. RESULTS CA increased ASIC1 in the hippocampus of rats in comparison with control animals. This was associated with the increase in IL-1β, IL-6 and TNF-α together with Caspase-3 and Caspase-9. The administration of amiloride into the lateral ventricle attenuated the upregulation of Caspase-3/Caspase-9 and this further alleviated neurological severity score and brain edema. Inhibition of central IL-6 and TNF-α also decreased ASIC1 in the hippocampus of CA rats. CONCLUSION Transient global ischemia induced by CA amplifies ASIC1a in the hippocampus likely via PIC signal. Amiloride administered into the Central Nervous System plays a neuroprotective role in the process of global ischemia. Thus, targeting ASICs (i.e., ASIC1a) is suggested for the treatment and improvement of CA-evoked global cerebral ischemia.
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Affiliation(s)
- Li Pang
- Department of Emergency Medicine, The First Hospital of Jilin University, Changchun, Jilin 130021, China
| | - Shouqin Ji
- Jiutai District People's Hospital of Changchun, Changchun, Jilin 130500, China
| | - Jihong Xing
- Department of Emergency Medicine, The First Hospital of Jilin University, Changchun, Jilin 130021, China
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15
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Ostrowski RP, Zhang JH. The insights into molecular pathways of hypoxia-inducible factor in the brain. J Neurosci Res 2018; 98:57-76. [PMID: 30548473 DOI: 10.1002/jnr.24366] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 11/16/2018] [Accepted: 11/20/2018] [Indexed: 12/12/2022]
Abstract
The objectives of this present work were to review recent developments on the role of hypoxia-inducible factor (HIF) in the survival of cells under normoxic versus hypoxic and inflammatory brain conditions. The dual nature of HIF effects appears well established, based on the accumulated evidence of HIF playing both the role of adaptive factor and mediator of cell demise. Cellular HIF responses depend on pathophysiological conditions, developmental phase, comorbidities, and administered medications. In addition, HIF-1α and HIF-2α actions may vary in the same tissues. The multiple roles of HIF in stem cells are emerging. HIF not only regulates expression of target genes and thereby influences resultant protein levels but also contributes to epigenetic changes that may reciprocally provide feedback regulations loops. These HIF-dependent alterations in neurological diseases and its responses to treatments in vivo need to be examined alongside with a functional status of subjects involved in such studies. The knowledge of HIF pathways might be helpful in devising HIF-mimetics and modulating drugs, acting on the molecular level to improve clinical outcomes, as exemplified here by clinical and experimental data of selected brain diseases, occasionally corroborated by the data from disorders of other organs. Because of complex role of HIF in brain injuries, prospective therapeutic interventions need to differentially target HIF responses depending on their roles in the molecular mechanisms of neurologic diseases.
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Affiliation(s)
- Robert P Ostrowski
- Department of Experimental and Clinical Neuropathology, Mossakowski Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland
| | - John H Zhang
- Departments of Anesthesiology and Physiology, School of Medicine, Loma Linda University, Loma Linda, California
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16
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Xing J, Xie T, Tan W, Li R, Yu C, Han X. microRNA‐183 improve myocardial damager via NF‐kb pathway: In vitro and in vivo study. J Cell Biochem 2018; 120:10145-10154. [PMID: 30548682 DOI: 10.1002/jcb.28298] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2018] [Accepted: 11/20/2018] [Indexed: 01/03/2023]
Affiliation(s)
- Jie Xing
- Department of Cardiac surgery Hainan General Hospital Haikou Hainan China
| | - Ting Xie
- Department of Cardiac surgery Hainan General Hospital Haikou Hainan China
| | - Wei Tan
- Department of Cardiac surgery Hainan General Hospital Haikou Hainan China
| | - Ruzheng Li
- Department of Cardiac surgery Hainan General Hospital Haikou Hainan China
| | - Cheng Yu
- Department of Cardiac surgery Hainan General Hospital Haikou Hainan China
| | - Xiaohu Han
- Department of Cardiac surgery Hainan General Hospital Haikou Hainan China
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17
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JIANG XM, HU JH, WANG LL, MA C, WANG X, LIU XL. Ulinastatin Alleviates Neurological Deficiencies Evoked by Transient Cerebral Ischemia via Improving Autophagy, Nrf-2-ARE and Apoptosis Signals in Hippocampus. Physiol Res 2018; 67:637-646. [PMID: 29750875 DOI: 10.33549/physiolres.933780] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Ulinastatin [or called as urinary trypsin inhibitor (UTI)] plays a role in regulating neurological deficits evoked by transient cerebral ischemia. However, the underlying mechanisms still need to be determined. The present study was to examine the effects of UTI on autophagy, Nrf2-ARE and apoptosis signal pathway in the hippocampus in the process of neurological functions after cerebral ischemia using a rat model of cardiac arrest (CA). CA was induced by asphyxia followed by cardiopulmonary resuscitation (CPR) in rats. Western blot analysis was employed to determine the expression of representative autophagy (namely, Atg5, LC3, Beclin 1), p62 protein (a maker of autophagic flux), and Nrf2-ARE pathways. Neuronal apoptosis was assessed by determining expression levels of Caspase-3 and Caspase-9, and by examining terminal deoxynucleotide transferase-mediated dUTP nick-end labeling (TUNEL). The modified neurological severity score (mNSS) and spatial working memory performance were used to assess neurological deficiencies in CA rats. Our results show that CA amplified autophagy and apoptotic Caspase-3/Caspase-9, and downregulated Nrf2-ARE pathway in the hippocampus CA1 region. Systemic administration of UTI attenuated autophagy and apoptosis, and largely restored Nrf2-ARE signal pathway following cerebral ischemia and thereby alleviated neurological deficits with increasing survival of CA rats. Our data suggest that UTI improves the worsened protein expression of autophagy and apoptosis, and restores Nrf2-ARE signals in the hippocampus and this is linked to inhibition of neurological deficiencies in transient cerebral ischemia. UTI plays a beneficial role in modulating neurological deficits induced by transient cerebral ischemia via central autophagy, apoptosis and Nrf2-ARE mechanisms.
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Affiliation(s)
| | | | | | | | - X. WANG
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Changchun, Jilin, China
| | - X.-L. LIU
- Department of Emergency Medicine, The First Hospital of Jilin University, Changchun, Jilin, China
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18
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Mo C, Xu M, Wen C, Chang R, Huang C, Zou W, Zhu X, Guo Q. Normalizing JMJD6 Expression in Rat Spinal Dorsal Horn Alleviates Hyperalgesia Following Chronic Constriction Injury. Front Neurosci 2018; 12:542. [PMID: 30131674 PMCID: PMC6090481 DOI: 10.3389/fnins.2018.00542] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 07/18/2018] [Indexed: 11/16/2022] Open
Abstract
Jumonji domain-containing protein 6 (JMJD6) is a homolog of hypoxia-inducible factor (HIF) asparaginyl hydroxylase, an inhibitor of HIF. HIF-1α is known to participate in neuropathic pain (NPP) during chronic constriction injury (CCI); however, the roles of JMJD6 in NPP have not been systematically investigated. In this study, we examined the temporal distribution and cellular location of JMJD6 in the spinal cord during CCI. In addition, we assessed behavioral changes representative of NPP in rats. Following CCI, lentiviral vectors (LV-JMJD6) were intrathecally administered to observe the changes in the expression of JMJD6, HIF-1α, and its downstream factor caspase-3. Co-immunoprecipitation was used to detect potential interactions between JMJD6 and HIF-1α. We found that JMJD6 was decreased in rats following CCI, which was accompanied by significant NPP–associated behavioral changes. JMJD6 was mainly expressed in neurons. Intrathecal injection of LV-JMJD6 following CCI alleviated the thermal and mechanical hyperalgesia, normalized JMJD6 protein expression, and decreased HIF-1α protein expression with a corresponding reduction in caspase-3 protein expression. Furthermore, the co-immunoprecipitation analyses showed that JMJD6 and HIF-1α protein immunoprecipitated with each other, indicating an interaction between these two proteins. Taken together, the results suggest that JMJD6 may serve as a sensor in neurons of the adult rat spinal cord during the CCI state. Furthermore, JMJD6 may exert its function in NPP by regulating HIF-1α in rats exposed to CCI.
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Affiliation(s)
- Cheng Mo
- Department of Anesthesiology, Xiangya Hospital of Central South University, Changsha, China.,Department of Anesthesiology, The People's Hospital of Guangxi Zhuangzu Autonomous Region, Nanning, China
| | - Mengyuan Xu
- Department of Anesthesiology, Xiangya Hospital of Central South University, Changsha, China
| | - Cen Wen
- Department of Anesthesiology, Xiangya Hospital of Central South University, Changsha, China
| | - Ruimin Chang
- Department of Thoracic Surgery, Xiangya Hospital Central South University, Changsha, China
| | - Changsheng Huang
- Department of Anesthesiology, Xiangya Hospital of Central South University, Changsha, China
| | - Wangyuan Zou
- Department of Anesthesiology, Xiangya Hospital of Central South University, Changsha, China
| | - Xiaoyan Zhu
- Department of Anesthesiology, Xiangya Hospital of Central South University, Changsha, China
| | - Qulian Guo
- Department of Anesthesiology, Xiangya Hospital of Central South University, Changsha, China
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19
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Lyu Z, Cao J, Wang J, Lian H. Protective effect of vitexin reduces sevoflurane-induced neuronal apoptosis through HIF-1α, VEGF and p38 MAPK signaling pathway in vitro and in newborn rats. Exp Ther Med 2018; 15:3117-3123. [PMID: 29456715 DOI: 10.3892/etm.2018.5758] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 10/26/2017] [Indexed: 12/17/2022] Open
Abstract
Previous studies have demonstrated that Vitexin possesses antihypertensive, anti-inflammatory and potential anticancer effects. The present study aimed to investigate whether the protective effect of vitexin protects against sevoflurane-induced neuronal apoptosis and the underlying mechanisms of this protective effect. The results demonstrated that Vitexin pretreatment significantly reduced neuronal apoptosis, and inhibited caspase-3 activity, apoptosis regulator BAX protein expression and malondialdehyde levels in sevoflurane-induced newborn rats. In addition, Vitexin pretreatment increased superoxide dismutase and glutathione peroxidase activity. Furthermore, it was revealed that treatment with vitexin induced hypoxia inducible factor 1α subunit (HIF-1α) and vascular endothelial growth factor (VEGF) protein expression, and suppressed phosphorylated-p38 MAP kinase (p38) protein expression in sevoflurane-induced newborn rat. Together, the results of the current study suggest that the protective effect of vitexin reduces sevoflurane-induced neuronal apoptosis through HIF-1α-, VEGF- and p38-associated signaling pathways in newborn rats.
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Affiliation(s)
- Zhipai Lyu
- Department of Anesthesia, The Third Affiliated Hospital of Zhengzhou University, Henan, Zhengzhou 450052, P.R. China
| | - Jing Cao
- Department of Pathology, The Third Affiliated Hospital of Zhengzhou University, Henan, Zhengzhou 450052, P.R. China
| | - Ju Wang
- Department of Anesthesia, The Third Affiliated Hospital of Zhengzhou University, Henan, Zhengzhou 450052, P.R. China
| | - Hongmei Lian
- Department of Anesthesia, The Third Affiliated Hospital of Zhengzhou University, Henan, Zhengzhou 450052, P.R. China
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20
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Xing J, Lu J. Effects of mTOR on Neurological Deficits after Transient Global Ischemia. Transl Neurosci 2017; 8:21-26. [PMID: 28729914 PMCID: PMC5443888 DOI: 10.1515/tnsci-2017-0005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 04/03/2017] [Indexed: 01/31/2023] Open
Abstract
Mammalian target of rapamycin (mTOR) is a serine/threonine protein kinase and activation of its signal pathway plays an important role in regulating protein growth and synthesis as well as cell proliferation and survival. In the present study, we examined the contribution of mTOR and its downstream products to brain injuries and neurological deficiencies after cardiac arrest (CA) induced-transient global ischemia. CA was induced by asphyxia followed by cardiopulmonary resuscitation (CPR) in rats. Our results showed that expression of p-mTOR, mTOR-mediated phosphorylation of 4E-binding protein 4 (4E-BP1) and p70 ribosomal S6 protein kinase 1 (S6K1) pathways were amplified in CA rats compared to their controls. Blocking mTOR using rapamycin attenuated upregulation of pro-inflammatory cytokines (namely IL-1β, IL-6 and TNF-α), and Caspase-3, indicating cell apoptosis and also promoting the levels of vascular endothelial growth factor (VEGF) and its subtype receptor VEGFR-2 in the hippocampus. Moreover, the effects of rapamycin were linked to improvement of neurological deficits and increased brain water content observed in CA rats. In conclusion, activation of mTOR signal is engaged in pathophysiological process during CA-induced transient global ischemia and blocking mTOR pathway plays a beneficial role in regulating injured neuronal tissues and neurological deficits via PIC, apoptotic Caspase-3 and VEGF mechanisms. Targeting one or more of these specific mTOR pathways and its downstream signaling molecules may present new opportunities for neural dysfunction and vulnerability related to transient global ischemia.
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Affiliation(s)
- Jihong Xing
- Department of Emergency Medicine, The First Hospital of Jilin University, Changchun, Jilin 130021, China
| | - Jian Lu
- Department of Abdominal Surgery, Jilin Province Carcinoma Hospital, Changchun, Jilin 130021, China
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21
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Jiang XM, Hu JH, Wang LL, Ma C, Wang X, Liu XL. Effects of ulinastatin on global ischemia via brain pro-inflammation signal. Transl Neurosci 2016; 7:158-163. [PMID: 28123836 PMCID: PMC5234523 DOI: 10.1515/tnsci-2016-0023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 11/17/2016] [Indexed: 12/24/2022] Open
Abstract
Ulinastatin [urinary trypsin inhibitor (UTI)] plays an important role in the
protection of organs against ischemic injury during severe inflammation. The purposes
of this study were to examine the effects of UTI on the levels of pro-inflammatory
cytokines (PICs) and protein expression of PIC receptors in the neocortex and
hippocampus CA1 region of rats after transient global ischemia induced via cardiac
arrest (CA). Specifcally, interleukin-1β (IL-1β), interleukin-6 (IL-6)
and tumor necrosis factor-α (TNF-α) were analyzed. CA was induced by
asphyxia followed by cardiopulmonary resuscitation in rats. ELISA and western blot
analysis were employed to determine PICs and their receptors in the neocortex and
hippocampus. Our results show that IL-1β, IL-6 and TNF-α were
significantly elevated in the neocortex and hippocampal CA1 field after CA. This was
accompanied with an increase in PIC receptors, namely IL-1R, IL-6R and TNFR1.
Systemic injection of UTI attenuated the amplification of PIC signal pathways in
these brain regions. UTI also improved the modified Neurological Severity Score and
brain tissue edema in CA rats. Notably, UTI resulted in an increase in survival of CA
rats as compared to CA rats without treatment. In conclusion, UTI plays a beneficial
role in modulating transient global ischemia induced by CA by altering PIC signal
mechanisms, but further studies are needed to draw more firm conclusions.
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Affiliation(s)
- Xiao-Ming Jiang
- Department of Emergency Medicine, The First Hospital of Jilin University Changchun, Jilin 130021, P.R. China
| | - Jing-Hai Hu
- Department of Urology, The First Hospital of Jilin University Changchun, Jilin 130021, P.R. China
| | - Lu-Lu Wang
- Cardiovascular Center for Diagnostics and Treatment, The First Hospital of Jilin University Changchun, Jilin 130021, P.R. China
| | - Chi Ma
- Department of Brain Tumor Surgery, The First Hospital of Jilin University Changchun, Jilin 130021, P.R. China
| | - Xu Wang
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University Changchun, Jilin 130021, P.R. China
| | - Xiao-Liang Liu
- Department of Emergency Medicine, The First Hospital of Jilin University Changchun, Jilin 130021, P.R. China
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