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Liu Y, Ma X, Mao F, Qiu J, Bi J, Li X, Gu X, Zheng Y, Zhao Y. HMGR and CHS gene cloning, characterizations and tissue-specific expressions in Polygala tenuifolia Willd. PLoS One 2024; 19:e0300895. [PMID: 38527035 PMCID: PMC10962832 DOI: 10.1371/journal.pone.0300895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Accepted: 03/03/2024] [Indexed: 03/27/2024] Open
Abstract
Triterpenoid saponins and flavonoids have several pharmacological activities against P. tenuifolia. The 3-hydroxy-3-methylglutaryl-CoA reductase (HMGR) and chalcone synthase (CHS) are the rate-limiting enzymes of triterpenoid saponin and flavonoid biosynthesis, respectively. In this study, HMGR and CHS genes were cloned from P. tenuifolia, and their bioinformatics analyses and tissue-specific expression were investigated. The results showed that the HMGR and CHS genes were successfully cloned, separately named the PtHMGR gene (NCBI accession: MK424118) and PtCHS gene (NCBI accession: MK424117). The PtHMGR gene is 2323 bp long, has an open reading frame (ORF) of 1782 bp, and encods 593 amino acids. The PtCHS gene is 1633 bp long with an ORF of 1170 bp, encoding 389 amino acids. PtHMGR and PtCHS were both hydrophobic, not signal peptides or secreted proteins, containing 10 conserved motifs. PtHMGR and PtCHS separately showed high homology with HMGR and CHS proteins from other species, and their secondary structures mainly included α-helix and random curl. The tertiary structure of PtHMGR was highly similarity to that the template 7ULI in RCSB PDB with 92.0% coverage rate. The HMG-CoA-binding domain of PtHMGR is located at 173-572 amino acid residues, including five bound sites. The tertiary structure of PtCHS showed high consistency with the template 1I86 in RCSB PDB with 100% coverage rate, contained malonyl CoA and 4-coumaroyl-CoA linkers. The expression of PtHMGR and PtCHS is tissue-specific. PtHMGR transcripts were mainly accumulated in roots, followed by leaves, and least in stems, and were significantly positively correlated with the contents of total saponin and tenuifolin. PtCHS was highly expressed in the stems, followed by the leaves, with low expression in the roots. PtCHS transcripts showed a significant positive correlation with total flavonoids content, however, they were significantly negatively correlated with the content of polygalaxanthone III (a type of flavonoids). This study provided insight for further revealing the roles of PtHMGR and PtCHS.
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Affiliation(s)
- Yang Liu
- College of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang, Hebei Province, China
- Traditional Chinese Medicine Processing Technology Innovation Center of Hebei Province, Shijiazhuang, Hebei Province, China
- International Joint Research Center on Resource Utilization and Quality Evaluation of Traditional Chinese Medicine of Hebei Province, Shijiazhuang, Hebei Province, China
| | - Xiaofang Ma
- Yinchuan Women and Children Health Care Hospital, Yinchuan, Ningxia, China
| | - Fuying Mao
- Experimental Center, Hebei University of Chinese Medicine, Shijiazhuang, Hebei Province, China
| | - Jinmiao Qiu
- College of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang, Hebei Province, China
| | - Jingyi Bi
- College of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang, Hebei Province, China
| | - Xiaowei Li
- College of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang, Hebei Province, China
| | - Xian Gu
- College of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang, Hebei Province, China
| | - Yuguang Zheng
- Traditional Chinese Medicine Processing Technology Innovation Center of Hebei Province, Shijiazhuang, Hebei Province, China
- Hebei Chemical and Pharmaceutical College, Shijiazhuang, Hebei Province, China
| | - Yunsheng Zhao
- College of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang, Hebei Province, China
- Traditional Chinese Medicine Processing Technology Innovation Center of Hebei Province, Shijiazhuang, Hebei Province, China
- International Joint Research Center on Resource Utilization and Quality Evaluation of Traditional Chinese Medicine of Hebei Province, Shijiazhuang, Hebei Province, China
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Chen Y, Li H, Yang Y, Feng L, Yang L, Zhao J, Xin X, Lv S, Fang X, Wen W, Cui Y, Cui H. Polygalasaponin F ameliorates middle cerebral artery occlusion-induced focal ischemia / reperfusion injury in rats through inhibiting TXNIP/NLRP3 signaling pathway. J Neuroimmunol 2024; 387:578281. [PMID: 38198981 DOI: 10.1016/j.jneuroim.2023.578281] [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: 11/18/2023] [Revised: 12/27/2023] [Accepted: 12/30/2023] [Indexed: 01/12/2024]
Abstract
BACKGROUND Polygalasaponin F (PGSF), an oleanane triterpenoid saponin extracted from Polygala japonica, has been demonstrated with neuroprotective effect. However, the therapeutic effects and mechanisms of PGSF on focal ischemia remain unknown; METHODS: In this study, male Sprague Dawley (SD) rats aged 6-8 weeks were initially selected to establish a rat model of middle cerebral artery occlusion (MCAO) to evaluate the therapeutic effect of PGSF intervention and to investigate the impact of PGSF on the thioredoxin-interacting protein/NOD-, LRR-, and pyrin domain-containing protein 3 (TXNIP/NLRP3) inflammatory pathway. Secondly, brain neuron cells were isolated, and the cells received oxygen-glucose deprivation/reoxygenation (OGD/R) culture to establish the cell injury model in vitro. The mechanism of PGSF on the TXNIP/NLRP3 pathway was further validated; RESULTS: Our results showed that PGSF treatment reduced neurological scores, brain tissue water content and infarct volume and ameliorated the pathological changes in cerebral cortex in MCAO-induced focal ischemia rats. The TNF-α, IL-1β and IL-6 levels decreased in MCAO-induced focal ischemia rats after PGSF treatment. Moreover, PGSF down-regulated the protein expressions of TXNIP, NLRP3, ASC, cleaved caspase-1, IL-1β, and IL-18 in MCAO-induced focal ischemia rats. Meanwhile, PGSF treatment inhibited apoptosis, and reduced the levels of ROS, inflammatory cytokine and TXNIP/NLRP3 pathway-related proteins (TXNIP, NLRP3, ASC, cleaved caspase-1, IL-1β, and IL-18) in OGD/R-induced neuronal injury cells. Finally, PGSF treatment also disrupted the interaction between NLRP3 and TXNIP in vitro; CONCLUSIONS: Our study demonstrated the therapeutic effects of PGSF on MCAO-induced focal ischemia rats. Moreover, the neuroprotective mechanism of PGSF on focal ischemia was associated with the inhibition of TXNIP/NLRP3 signaling pathway.
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Affiliation(s)
- Yao Chen
- Nanjing University of Chinese Medicine, Nanjing 210000, China; Yunnan University of Traditional Chinese Medicine, Kunming 650000, China
| | - Hanzhou Li
- Tianjin University of Traditional Chinese Medicine, Tianjin 300000, China
| | - Yan Yang
- Yunnan University of Traditional Chinese Medicine, Kunming 650000, China
| | - Lei Feng
- Yunnan University of Traditional Chinese Medicine, Kunming 650000, China
| | - Ling Yang
- Yunnan University of Traditional Chinese Medicine, Kunming 650000, China
| | - Jie Zhao
- Yunnan University of Traditional Chinese Medicine, Kunming 650000, China
| | - Xiaochi Xin
- Yunnan University of Traditional Chinese Medicine, Kunming 650000, China
| | - Shuquan Lv
- Cangzhou Hospital of Integrated Traditional Chinese Medicine and Western Medicine of Hebei Province, Cangzhou 061001, China
| | - Xixing Fang
- College of Traditional Chinese Medicine, Changchun University of Traditional Chinese Medicine, Changchun 130000, China
| | - Weibo Wen
- Nanjing University of Chinese Medicine, Nanjing 210000, China; Yunnan University of Traditional Chinese Medicine, Kunming 650000, China.
| | - Youxiang Cui
- College of Traditional Chinese Medicine, Changchun University of Traditional Chinese Medicine, Changchun 130000, China.
| | - Huantian Cui
- Yunnan University of Traditional Chinese Medicine, Kunming 650000, China; Shandong Provincial Key Laboratory of Animal Cell and Developmental Biology, School of Life Sciences, Shandong University, Qingdao 266000, China.
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Yan G, Tao Z, Xing X, Zhou Z, Wang X, Li X, Li F. Down-Regulated microRNA-192-5p Protects Against Hypoxic-Ischemic Brain Damage via Regulation of YAP1-Mediated Hippo Signaling Pathway. Neurochem Res 2022; 47:1243-1254. [PMID: 35084661 DOI: 10.1007/s11064-021-03518-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 12/20/2021] [Accepted: 12/27/2021] [Indexed: 11/26/2022]
Abstract
Hypoxic-ischemic brain damage (HIBD) is a familiar neurological disorder. Emerging reports manifest that microRNAs (miRs) are related to the progression of HIBD. The goal of this study is to explore the mechanism of miR-192-5p in HIBD via regulation of Yes-associated protein 1 (YAP1)-mediated Hippo signaling pathway. The miR-192-5p, YAP1, and Hippo pathway-related factors Phospho (p)-Triaminoguanidinium azide (TAZ) in hippocampal tissues and neurons were detected. The regulatory relationship between miR-192-5p and YAP1 was verified. Neonatal hypoxic ischemia and oxygen-glucose deprivation (OGD) were used to simulate HIBD in vivo and in vitro. The neurobehavioral impairment, neuronal damage and vascular endothelial growth factor (VEGF) expression of neonatal rats in each group were detected. The viability, apoptosis and VEGF expression of hippocampal neurons in each group were also examined. MiR-192-5p expression was elevated while YAP1 expression was reduced in hippocampal tissues of HIBD rats in vivo and OGD neurons in vitro. MiR-192-5p had a targeting relation with YAP1. Suppressed miR-192-5p or overexpressed YAP1 in HIBD rats alleviated neurobehavioral impairment and neuronal damage, and decreased the expression levels of p-TAZ and VEGF expression in vivo. Reduced miR-192-5p or augmented YAP1 decelerated the neuron apoptosis, decreased the p-TAZ level and VEGF level and promoted cell viability of OGD hippocampal neurons in vitro. The study highlights that inhibited miR-192-5p protects against HIBD via regulation of YAP1 and Hippo signaling pathway, which is beneficial for HIBD treatment.
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Affiliation(s)
- Gangli Yan
- Department of Neurology, Puren Hospital Affiliated to Wuhan University of Science and Technology, 1 Benxi Street, Qingshan District, Wuhan, 430081, Hubei, China
| | - Zhiwei Tao
- Department of Neurology, Wuhan Asia General Hospital, Wuhan, 430090, Hubei, China
| | - Xiaobing Xing
- Department of Neurology, Puren Hospital Affiliated to Wuhan University of Science and Technology, 1 Benxi Street, Qingshan District, Wuhan, 430081, Hubei, China
| | - Ziying Zhou
- Department of Neurology, Puren Hospital Affiliated to Wuhan University of Science and Technology, 1 Benxi Street, Qingshan District, Wuhan, 430081, Hubei, China
| | - Xinghua Wang
- Department of Neurology, Puren Hospital Affiliated to Wuhan University of Science and Technology, 1 Benxi Street, Qingshan District, Wuhan, 430081, Hubei, China
| | - Xing Li
- Department of Neurology, Puren Hospital Affiliated to Wuhan University of Science and Technology, 1 Benxi Street, Qingshan District, Wuhan, 430081, Hubei, China
| | - Fengguang Li
- Department of Neurology, Puren Hospital Affiliated to Wuhan University of Science and Technology, 1 Benxi Street, Qingshan District, Wuhan, 430081, Hubei, China.
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Sun C, Cao XC, Liu ZY, Ma CL, Li BM. Polygalasaponin F protects hippocampal neurons against glutamate-induced cytotoxicity. Neural Regen Res 2022; 17:178-184. [PMID: 34100454 PMCID: PMC8451577 DOI: 10.4103/1673-5374.314321] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Excess extracellular glutamate leads to excitotoxicity, which induces neuronal death through the overactivation of N-methyl-D-aspartate receptors (NMDARs). Excitotoxicity is thought to be closely related to various acute and chronic neurological disorders, such as stroke and Alzheimer’s disease. Polygalasaponin F (PGSF) is a triterpenoid saponin monomer that can be isolated from Polygala japonica, and has been reported to protect cells against apoptosis. To investigate the mechanisms underlying the neuroprotective effects of PGSF against glutamate-induced cytotoxicity, PGSF-pretreated hippocampal neurons were exposed to glutamate for 24 hours. The results demonstrated that PGSF inhibited glutamate-induced hippocampal neuron death in a concentration-dependent manner and reduced glutamate-induced Ca2+ overload in the cultured neurons. In addition, PGSF partially blocked the excess activity of NMDARs, inhibited both the downregulation of NMDAR subunit NR2A expression and the upregulation of NMDAR subunit NR2B expression, and upregulated the expression of phosphorylated cyclic adenosine monophosphate-responsive element-binding protein and brain-derived neurotrophic factor. These findings suggest that PGSF protects cultured hippocampal neurons against glutamate-induced cytotoxicity by regulating NMDARs. The study was approved by the Institutional Animal Care Committee of Nanchang University (approval No. 2017-0006) on December 29, 2017.
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Affiliation(s)
- Chong Sun
- Laboratory of Cognitive Function and Disorder, Institute of Life Science, Nanchang University, Nanchang, Jiangxi Province, China
| | - Xin-Cheng Cao
- Laboratory of Cognitive Function and Disorder, Institute of Life Science, Nanchang University, Nanchang, Jiangxi Province, China
| | - Zhi-Yang Liu
- Laboratory of Cognitive Function and Disorder, Institute of Life Science, Nanchang University, Nanchang, Jiangxi Province, China
| | - Chao-Lin Ma
- Laboratory of Cognitive Function and Disorder, Institute of Life Science, Nanchang University, Nanchang, Jiangxi Province, China
| | - Bao-Ming Li
- Laboratory of Cognitive Function and Disorder, Institute of Life Science, Nanchang University, Nanchang, Jiangxi Province; Institute of Brain Science and Department of Psychology, School of Education, Hangzhou Normal University, Hangzhou, Zhejiang Province, China
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Zhao Y, He J, Yu N, Jia C, Wang S. Mechanisms of Dexmedetomidine in Neuropathic Pain. Front Neurosci 2020; 14:330. [PMID: 32431587 PMCID: PMC7214625 DOI: 10.3389/fnins.2020.00330] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 03/20/2020] [Indexed: 12/23/2022] Open
Abstract
Dexmedetomidin is a new-generation, highly selective α2 adrenergic receptor agonist with a large number of advantages, including its sedative and analgesic properties, its ability to inhibit sympathetic nerves, its reduced anesthetic dosage, its hemodynamic stability, its mild respiratory depression abilities, and its ability to improve postoperative recognition. Its safety and effectiveness, as well as its ability to provide a certain degree of comfort to patients, make it a useful anesthetic adjuvant for a wide range of clinical applications. For example, dexmedetomidine is commonly used in patients undergoing general anesthesia, and it also exerts sedative effects during tracheal intubation or mechanical ventilation in intensive care unit patients. In recent years, with the deepening of clinical research on dexmedetomidine, the drug is still applied in the treatment of spastic pain, myofascial pain, neuropathic pain, complex pain syndrome, and chronic headache, as well as for multimodal analgesia. However, we must note that the appropriateness of patient and dose selection should be given attention when using this drug; furthermore, patients should be observed for adverse reactions such as hypotension and bradycardia. Therefore, the safety and effectiveness of this drug for long-term use remain to be studied. In addition, basic experimental studies have also found that dexmedetomidine can protect important organs, such as the brain, heart, kidney, liver, and lung, through various mechanisms, such as antisympathetic effects, the inhibition of apoptosis and oxidative stress, and a reduction in the inflammatory response. Moreover, the neuroprotective properties of dexmedetomidine have received the most attention from scholars. Hence, in this review, we mainly focus on the characteristics and clinical applications of dexmedetomidine, especially the role of dexmedetomidine in the nervous system and the use of dexmedetomidine in the relief of neuropathic pain.
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Affiliation(s)
- Yang Zhao
- Department of Anesthesiology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Jianshuai He
- Department of Anesthesiology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Ning Yu
- Department of Anesthesiology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Changxin Jia
- Department of Anesthesiology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Shilei Wang
- Department of Anesthesiology, The Affiliated Hospital of Qingdao University, Qingdao, China
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