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Pan F, Shu Q, Xie H, Zhao L, Wu P, Du Y, Lu J, He Y, Wang X, Peng H. Protective effects of triptolide against oxidative stress in retinal pigment epithelium cells via the PI3K/AKT/Nrf2 pathway: a network pharmacological method and experimental validation. Aging (Albany NY) 2024; 16:3955-3972. [PMID: 38393691 PMCID: PMC10929812 DOI: 10.18632/aging.205570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 01/11/2024] [Indexed: 02/25/2024]
Abstract
PURPOSE Among aging adults, age-related macular degeneration (AMD), is a prevalent cause of blindness. Nevertheless, its progression may be halted by antioxidation in retinal pigment epithelium (RPE). The primary effective constituent of Tripterygium wilfordii Hook. F., triptolide (TP), has demonstrated anti-inflammatory, antiproliferative, and antioxidant properties. The mechanics of the protective effect of triptolide against the oxidative damage in retinal pigment epithelial (RPE) were assessed in this study. METHODS ARPE-19 cells were pretreated with TP, and then exposed to sodium iodate (SI). First, cell viability was assessed using CCK-8. Subsequently, we measured indicators for cell oxidation including reactive oxygen species (ROS), catalase (CAT), superoxide dismutase (SOD), and malondialdehyde (MDA). Then, we used network pharmacological analysis and molecular docking to explore the signaling pathway of TP. Last, we used western blot, ELISA, and immunofluorescence assays to clarify the potential mechanistic pathways. RESULTS The network pharmacology data suggested that TP may inhibit AMD by regulating the PI3K/Akt signaling pathway. Experimental results showed that the potential mechanism is that it regulates the PI3K/Akt pathway and promotes Nrf2 phosphorylation and activation, thereby raising the level of antioxidant factors (HO-1, NQO1) and reducing the generation of ROS, which inhibit oxidative damage. CONCLUSION Our findings suggested that the effect of TP on SI-exposed RPE cells principally relies on the regulation of oxidative stress through the PI3K/Akt/Nrf2 signaling pathway.
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Affiliation(s)
- Fuying Pan
- Department of Ophthalmology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
- Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing 400016, China
| | - Qinxin Shu
- Department of Ophthalmology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
- Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing 400016, China
| | - Hao Xie
- Department of Ophthalmology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
- Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing 400016, China
| | - Long Zhao
- Department of Ophthalmology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
- Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing 400016, China
| | - Ping Wu
- Department of Ophthalmology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
- Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing 400016, China
| | - Yong Du
- Department of Ophthalmology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
- Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing 400016, China
| | - Jing Lu
- Department of Ophthalmology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
- Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing 400016, China
| | - Yuxia He
- Department of Ophthalmology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
- Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing 400016, China
| | - Xing Wang
- Department of Ophthalmology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
- Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing 400016, China
| | - Hui Peng
- Department of Ophthalmology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
- Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing 400016, China
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Guan Y, Tang G, Li L, Shu J, Zhao Y, Huang L, Tang J. Herbal medicine and gut microbiota: exploring untapped therapeutic potential in neurodegenerative disease management. Arch Pharm Res 2024; 47:146-164. [PMID: 38225532 PMCID: PMC10830735 DOI: 10.1007/s12272-023-01484-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Accepted: 12/29/2023] [Indexed: 01/17/2024]
Abstract
The gut microbiota that exists in the human gastrointestinal tract is incredibly important for the maintenance of general health as it contributes to multiple aspects of host physiology. Recent research has revealed a dynamic connection between the gut microbiota and the central nervous system, that can influence neurodegenerative diseases (NDs). Indeed, imbalances in the gut microbiota, or dysbiosis, play a vital role in the pathogenesis and progression of human diseases, particularly NDs. Herbal medicine has been used for centuries to treat human diseases, including NDs. These compounds help to relieve symptoms and delay the progression of NDs by improving intestinal barrier function, reducing neuroinflammation, and modulating neurotransmitter production. Notably, herbal medicine can mitigate the progression of NDs by regulating the gut microbiota. Therefore, an in-depth understanding of the potential mechanisms by which herbal medicine regulates the gut microbiota in the treatment of NDs can help explain the pathogenesis of NDs from a novel perspective and propose novel therapeutic strategies for NDs. In this review, we investigate the potential neuroprotective effects of herbal medicine, focusing on its ability to regulate the gut microbiota and restore homeostasis. We also highlight the challenges and future research priorities of the integration of herbal medicine and modern medicine. As the global population ages, access to this information is becoming increasingly important for developing effective treatments for these diseases.
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Affiliation(s)
- Yueyue Guan
- Department of Brain Disease, Chongqing Hospital of Traditional Chinese Medicine, Chongqing, 400021, China
| | - Guohua Tang
- Department of Brain Disease, Chongqing Hospital of Traditional Chinese Medicine, Chongqing, 400021, China
| | - Lei Li
- Department of Anorectal Surgery, Hospital of Chengdu University of Traditional Chinese Medicine and Chengdu University of Traditional Chinese Medicine, Chengdu, 610072, China
| | - Jianzhong Shu
- Department of Brain Disease, Chongqing Hospital of Traditional Chinese Medicine, Chongqing, 400021, China
| | - Yuhua Zhao
- Department of Brain Disease, Chongqing Hospital of Traditional Chinese Medicine, Chongqing, 400021, China
| | - Li Huang
- Department of Brain Disease, Chongqing Hospital of Traditional Chinese Medicine, Chongqing, 400021, China.
| | - Jun Tang
- Department of Brain Disease, Chongqing Hospital of Traditional Chinese Medicine, Chongqing, 400021, China.
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He Z, Botchway BOA, Zhang Y, Liu X. Triptolide activates the Nrf2 signaling pathway and inhibits the NF-κB signaling pathway to improve Alzheimer disease. Metab Brain Dis 2024; 39:173-182. [PMID: 37624431 DOI: 10.1007/s11011-023-01278-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 08/17/2023] [Indexed: 08/26/2023]
Abstract
Alzheimer disease (AD) is a common neurodegenerative disease with pathological features of accumulated amyloid plaques, neurofibrillary tangles, and the significant inflammatory environment. These features modify the living microenvironment for nerve cells, causing the damage, dysfunction, and death. Progressive neuronal loss directly leads to cognitive decline in AD patients and is closely related to brain inflammation. Therefore, impairing inflammation via signaling pathways may facilitate either the prevention or delay of the degenerative process. Triptolide has been evidenced to possess potent anti-inflammatory effect. In this review, we elaborate on two signaling pathways (the NF-κB and Nrf2 signaling pathways) that are involved in the anti-inflammatory effect of triptolide.
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Affiliation(s)
- Zuoting He
- Department of Histology and Embryology, School of Medicine, Shaoxing University, Zhejiang, Zhejiang Province, 312000, China
| | - Benson O A Botchway
- Institute of Neuroscience, Zhejiang University School of Medicine, Hangzhou, China
- Bupa Cromwell Hospital, Kensington, London, UK
| | - Yong Zhang
- Department of Histology and Embryology, School of Medicine, Shaoxing University, Zhejiang, Zhejiang Province, 312000, China
| | - Xuehong Liu
- Department of Histology and Embryology, School of Medicine, Shaoxing University, Zhejiang, Zhejiang Province, 312000, China.
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4
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Zhou Y, He Y, Teng X, Mi J, Yang J, Wei R, Liu W, Ma Q, Tan Z, Sang Z. Development of novel salicylic acid-donepezil-rivastigmine hybrids as multifunctional agents for the treatment of Alzheimer's disease. J Enzyme Inhib Med Chem 2023; 38:2231661. [PMID: 37414563 DOI: 10.1080/14756366.2023.2231661] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 06/06/2023] [Accepted: 06/26/2023] [Indexed: 07/08/2023] Open
Abstract
Alzheimer's disease (AD) is a chronic, progressive brain degenerative disease that is common in the elderly. So far, there is no effective treatment. The multi-target-directed ligands (MTDLs) strategy has been recognised as the most promising approach due to the complexity of the pathogenesis of AD. Herein, novel salicylic acid-donepezil-rivastigmine hybrids were designed and synthesised. The bioactivity results exhibited that 5a was a reversible and selective eqBChE inhibitor (IC50 = 0.53 μM), and the docking provided the possible mechanism. Compound 5a also displayed potential anti-inflammatory effects and significant neuroprotective effect. Moreover, 5a exhibited favourable stabilities in artificial gastrointestinal solution and plasma. Finally, 5a demonstrated potential cognitive improvement in scopolamine-induced cognitive dysfunction. Hence, 5a was a potential multifunctional lead compound against AD.
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Affiliation(s)
- Yi Zhou
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, China
| | - Ying He
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, China
| | - Xue Teng
- Key Laboratory of Tropical Biological Resources of Ministry of Education and One Health Institute, School of Pharmaceutical Sciences, Hainan University, Haikou, China
| | - Jing Mi
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, China
| | - Jing Yang
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, China
| | - Rongrui Wei
- Key Laboratory of Modern Preparation of Traditional Chinese Medicine of Ministry of Education, Research Center of Natural Resources of Chinese Medicinal Materials and Ethnic Medicine, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Wenmin Liu
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, China
| | - Qinge Ma
- Key Laboratory of Modern Preparation of Traditional Chinese Medicine of Ministry of Education, Research Center of Natural Resources of Chinese Medicinal Materials and Ethnic Medicine, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Zhenghuai Tan
- Institute of Traditional Chinese Medicine Pharmacology and Toxicology, Sichuan Academy of Chinese Medicine Sciences, Chengdu, China
| | - Zhipei Sang
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, China
- Key Laboratory of Tropical Biological Resources of Ministry of Education and One Health Institute, School of Pharmaceutical Sciences, Hainan University, Haikou, China
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5
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Fan D, Ying Z, Yang Y, Qian Q, Li Y, Wang P, An X, Yan M. Deciphering the anti-renal fibrosis mechanism of triptolide in diabetic nephropathy by the integrative approach of network pharmacology and experimental verification. JOURNAL OF ETHNOPHARMACOLOGY 2023; 316:116774. [PMID: 37311501 DOI: 10.1016/j.jep.2023.116774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 05/30/2023] [Accepted: 06/09/2023] [Indexed: 06/15/2023]
Affiliation(s)
- Decai Fan
- New Drug Screening Center, Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, NO. 24 TongJiaXiang St., Nanjing City, 210009, Jiangsu Province, China.
| | - Zi Ying
- New Drug Screening Center, Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, NO. 24 TongJiaXiang St., Nanjing City, 210009, Jiangsu Province, China.
| | - Ying Yang
- New Drug Screening Center, Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, NO. 24 TongJiaXiang St., Nanjing City, 210009, Jiangsu Province, China.
| | - Qi Qian
- Department of Endocrinology, Affiliated Hospital of Nanjing University of Chinese Medicine, NO. 155 HanZhong Rd., Nanjing, 210029, Jiangsu Province, China.
| | - Yuanyuan Li
- Department of Endocrinology, Affiliated Hospital of Nanjing University of Chinese Medicine, NO. 155 HanZhong Rd., Nanjing, 210029, Jiangsu Province, China.
| | - Panjun Wang
- Department of Endocrinology, Affiliated Hospital of Nanjing University of Chinese Medicine, NO. 155 HanZhong Rd., Nanjing, 210029, Jiangsu Province, China.
| | - Xiaofei An
- Department of Endocrinology, Affiliated Hospital of Nanjing University of Chinese Medicine, NO. 155 HanZhong Rd., Nanjing, 210029, Jiangsu Province, China.
| | - Ming Yan
- New Drug Screening Center, Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, NO. 24 TongJiaXiang St., Nanjing City, 210009, Jiangsu Province, China.
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Development of the "hidden" multi-target-directed ligands by AChE/BuChE for the treatment of Alzheimer's disease. Eur J Med Chem 2023; 251:115253. [PMID: 36921526 DOI: 10.1016/j.ejmech.2023.115253] [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: 11/26/2022] [Revised: 02/09/2023] [Accepted: 03/04/2023] [Indexed: 03/12/2023]
Abstract
Accumulation of evidences suggested that excessive amounts of AChE and BuChE in the brain of AD patients at the different stage of AD, which could hydrolyze ACh and accelerated Aβ aggregation. To develop new "hidden" multifunctional agents through AChE/BuChE would be a promising strategy to treat AD. To this end, firstly, a series of chalcone derivatives with chelating property was designed and synthesized. The in vitro results showed that compound 3f indicated significant selective MAO-B inhibitory activity (IC50 = 0.67 μM) and remarkable anti-inflammatory property. It also significantly inhibited self-induced Aβ1-42 aggregation and showed remarkable neuroprotective effects on Aβ25-35-induced PC12 cell injury. Furthermore, compound 3f was a selective metal chelator and could inhibit Cu2+-induced Aβ1-42 aggregation. Based on this, the carbamate fragment was introduced to compound 3f to obtain carbamate derivatives. The biological activity results exhibited that compound 4b showed good BBB permeability, good AChE inhibitory potency (IC50 = 5.3 μM), moderate BuChE inhibitory potency (IC50 = 12.4 μM), significant MAO-B inhibitory potency, anti-inflammation potency on LPS-induced BV-2 cells and neuroprotective effects on Aβ25-35-induced PC12 cell injury. Compared with 3f, compound 4b did not show obvious chelation property. Significantly, compound 4b could be activated by AChE/BuChE following inhibition of AChE/BuChE to liberate an active multifunctional chelator 3f, which was consistent with our original intention. More importantly, compounds 3f and 4b presented favorable ADME properties and good stability in artificial gastrointestinal fluid, blood plasma and rat liver microsomes. The in vivo results suggested that compound 4b (0.0195 μg/mL) could significantly improve dyskinesia and reaction capacity of the AlCl3-induced zebrafish AD model by increasing the level of ACh. Together our data suggest that compound 4b was a promising "hidden" multifunctional agent by AChE/BuChE, and this strategy deserved further development for the treatment of AD.
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7
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Cai Z, Liu M, Zeng L, Zhao K, Wang C, Sun T, Li Z, Liu R. Role of traditional Chinese medicine in ameliorating mitochondrial dysfunction via non-coding RNA signaling: Implication in the treatment of neurodegenerative diseases. Front Pharmacol 2023; 14:1123188. [PMID: 36937876 PMCID: PMC10014574 DOI: 10.3389/fphar.2023.1123188] [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: 12/13/2022] [Accepted: 02/17/2023] [Indexed: 03/05/2023] Open
Abstract
Neurodegenerative diseases (NDs) are common chronic disorders associated with progressive nervous system damage, including Alzheimer's disease, Parkinson's disease, and Huntington's disease, among others. Mitochondria are abundant in various nervous system cells and provide a bulk supply of the adenosine triphosphate necessary for brain function, considered the center of the free-radical theory of aging. One common feature of NDs is mitochondrial dysfunction, which is involved in many physiopathological processes, including apoptosis, inflammation, oxidative stress, and calcium homeostasis. Recently, genetic studies revealed extensive links between mitochondrion impairment and dysregulation of non-coding RNAs (ncRNAs) in the pathology of NDs. Traditional Chinese medicines (TCMs) have been used for thousands of years in treating NDs. Numerous modern pharmacological studies have demonstrated the therapeutic effects of prescription, herbal medicine, bioactive ingredients, and monomer compounds of TCMs, which are important for managing the symptoms of NDs. Some highly effective TCMs exert protective effects on various key pathological features regulated by mitochondria and play a pivotal role in recovering disrupted signaling pathways. These disrupted signaling pathways are induced by abnormally-expressed ncRNAs associated with mitochondrial dysfunction, including microRNAs, long ncRNAs, and circular RNAs. In this review, we first explored the underlying ncRNA mechanisms linking mitochondrial dysfunction and neurodegeneration, demonstrating the implication of ncRNA-induced mitochondrial dysfunction in the pathogenesis of NDs. The ncRNA-induced mitochondrial dysfunctions affect mitochondrial biogenesis, dynamics, autophagy, Ca2+ homeostasis, oxidative stress, and downstream apoptosis. The review also discussed the targeting of the disease-related mitochondrial proteins in NDs and the protective effects of TCM formulas with definite composition, standardized extracts from individual TCMs, and monomeric compounds isolated from TCM. Additionally, we explored the ncRNA regulation of mitochondrial dysfunction in NDs and the effects and potential mechanisms of representative TCMs in alleviating mitochondrial pathogenesis and conferring anti-inflammatory, antioxidant, and anti-apoptotic pathways against NDs. Therefore, this review presents an overview of the role of mitochondrion-related ncRNAs and the target genes for TCM-based therapeutic interventions in NDs, providing insight into understanding the "multi-level compound-target-pathway regulatory" treatment mechanism of TCMs.
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Affiliation(s)
| | | | | | | | | | | | | | - Rui Liu
- *Correspondence: Zhuorong Li, ; Rui Liu,
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Zhang Q, Li J, Sun Y, Song S, Li X, Chen G. Neoagarohexaose Protects against Amyloid β-Induced Oxidative Stress and Aggregation. APPL BIOCHEM MICRO+ 2022. [DOI: 10.1134/s0003683822100179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
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Sun X, Shen B, Yu H, Wu W, Sheng R, Fang Y, Guo R. Therapeutic potential of demethylzeylasteral, a triterpenoid of the genus Tripterygium wilfordii. Fitoterapia 2022; 163:105333. [DOI: 10.1016/j.fitote.2022.105333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 10/09/2022] [Accepted: 10/10/2022] [Indexed: 11/28/2022]
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Cui Y, Jiang X, Feng J. The therapeutic potential of triptolide and celastrol in neurological diseases. Front Pharmacol 2022; 13:1024955. [PMID: 36339550 PMCID: PMC9626530 DOI: 10.3389/fphar.2022.1024955] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 10/07/2022] [Indexed: 12/01/2022] Open
Abstract
Neurological diseases are complex diseases affecting the brain and spinal cord, with numerous etiologies and pathogenesis not yet fully elucidated. Tripterygium wilfordii Hook. F. (TWHF) is a traditional Chinese medicine with a long history of medicinal use in China and is widely used to treat autoimmune and inflammatory diseases such as systemic lupus erythematosus and rheumatoid arthritis. With the rapid development of modern technology, the two main bioactive components of TWHF, triptolide and celastrol, have been found to have anti-inflammatory, immunosuppressive and anti-tumor effects and can be used in the treatment of a variety of diseases, including neurological diseases. In this paper, we summarize the preclinical studies of triptolide and celastrol in neurological diseases such as neurodegenerative diseases, brain and spinal cord injury, and epilepsy. In addition, we review the mechanisms of action of triptolide and celastrol in neurological diseases, their toxicity, related derivatives, and nanotechnology-based carrier system.
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Affiliation(s)
- Yueran Cui
- Department of Neurology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Xuejiao Jiang
- Department of Otolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Juan Feng
- Department of Neurology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
- *Correspondence: Juan Feng,
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Xu P, Wu Z, Peng Y, Gao J, Zheng F, Tan J, Xu J, Wang T. Neuroprotection of Triptolide against Amyloid-Beta1-42-induced toxicity via the Akt/mTOR/p70S6K-mediated Autophagy Pathway. AN ACAD BRAS CIENC 2022; 94:e20210938. [PMID: 35946645 DOI: 10.1590/0001-3765202220210938] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 12/13/2021] [Indexed: 11/22/2022] Open
Abstract
Triptolide is a natural active compound that has significant neuroprotective properties and shows promising effects in the treatment of Alzheimer's disease (AD). Recent studies have shown that autophagy occurs in AD. In this study, we determined whether autophagy regulated by triptolide ameliorates neuronal death caused by amyloid-Beta1-42 (Aβ1-42). We examined the effects of triptolide on cell viability, autophagy, apoptosis, and the protein kinase B/mammalian target of the rapamysin/70 kDa ribosomal protein S6 kinase (Akt/mTOR/p70S6K) signaling pathway in PC12 cells. The results indicated that triptolide treatment exhibited a cytoprotective effect against cell injury induced by Aβ1-42. Triptolide also reduced apoptosis and enhanced cell survival by decreasing autophagosome accumulation and inducing autophagic degradation. Furthermore, our results also showed that activating the Akt/mTOR/p70S6K mechanism was one reason for the protection of triptolide. Triptolide treatment protected against Aβ1-42-induced cytotoxicity by decreasing autophagosome accumulation, and inducing autophagic degradation in PC12 cells. These findings also suggest that the reduction of autophagosome accumulation observed in triptolide-treated cells was Akt/mTOR/p70S6K pathway dependent. Overall, triptolide exhibits a neuron protective effect and this study provides new insight into AD prevention and treatment.
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Affiliation(s)
- Pengjuan Xu
- Tianjin University of Traditional Chinese Medicine, School of Integrative Medicine, 10 Poyanghu Road, Jinghai District, Tianjin 301617, China
| | - Zixuan Wu
- Tianjin University of Traditional Chinese Medicine, School of Integrative Medicine, 10 Poyanghu Road, Jinghai District, Tianjin 301617, China
| | - Yanfei Peng
- Tianjin University of Traditional Chinese Medicine, School of Integrative Medicine, 10 Poyanghu Road, Jinghai District, Tianjin 301617, China
| | - Jing Gao
- Tianjin University of Traditional Chinese Medicine, School of Integrative Medicine, 10 Poyanghu Road, Jinghai District, Tianjin 301617, China
| | - Fang Zheng
- Tianjin University of Traditional Chinese Medicine, School of Integrative Medicine, 10 Poyanghu Road, Jinghai District, Tianjin 301617, China
| | - Junzhen Tan
- Tianjin University of Traditional Chinese Medicine, School of Integrative Medicine, 10 Poyanghu Road, Jinghai District, Tianjin 301617, China
| | - Jing Xu
- Tianjin Medical University General Hospital, Department of Neurology, 154 Anshan Road, Heping District, Tianjin 300052, China
| | - Tao Wang
- Tianjin University of Traditional Chinese Medicine, School of Integrative Medicine, 10 Poyanghu Road, Jinghai District, Tianjin 301617, China
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Fu H, Liu M, Yan J, Zhao N, Qu L. Stachydrine Inhibits PC12 Cell Apoptosis Induced by Aβ25-35 in an in vitro Cell Model of Neurocognitive Disorders. LETT DRUG DES DISCOV 2021. [DOI: 10.2174/1570180817999201110115007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Abnormal deposition of amyloid beta (Aβ) is considered the primary
cause of neurocognitive disorders (NCDs). Inhibiting cytotoxicity is an important aspect of the
treatment of NCDs. Stachydrine (STA) has been widely used for gynecological and cardiovascular
disorders. However, whether STA has protective functions in PC12 cells treated with Aβ25-35 remains
unclear.
Introduction:
Traditional Chinese Medicine, stachydrine (STA), is a water-soluble alkaloid of
Leonurus heterophyllus, which can inhibit cell apoptosis, suppress tumor growth, maintain homeostasis
of myocardial cells, and alleviate endothelial dysfunction. This study will investigate the effect
of STA on inhibiting PC12 cell apoptosis induced by Aβ25-35 in an in vitro cell model of neurocognitive
disorders.
Methods:
The differentially expressed genes (DEGs) in cells treated with STA were analyzed according
to the Gene Expression Omnibus (GSE) 85871 data, and the STITCH database was used to
identify the target genes of STA. PC12 cells were treated with Aβ25-35 and/or STA, 3-(4,5-
dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay was performed and lactate
dehydrogenase (LDH) activity was determined. The cell cycle distribution was detected by flow
cytometry, and quantitative reverse transcription-polymerase chain reaction (qRT-PCR) or Western
blotting were used to detect the expression of genes or proteins.
Results:
GSE85871 data showed 37 upregulated and 48 downregulated genes among the DEGs
affected by STA. The results from the STITCH database showed that RPS8 and EED were target
genes of STA. GSE1297 analysis showed the 13 most significantly upregulated genes. STA might
affect the occurrence of NCDs through the interaction of TP53 with EED and RPS8. Finally, Aβ25-35
promoted apoptosis and LDH release of PC-12 cells, arrested the cell cycle in the G2/M phase, and
inhibited the expression of the RPS8, EED, Bcl-2 and P53 genes. STA could reverse the effect of
Aβ25-35.
Conclusion:
STA may play an important role in inhibiting apoptosis induced by Aβ25-35 by targeting
the RPS8 and EED genes in the NCDs model in vitro.
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Affiliation(s)
- Huan Fu
- Department of Anesthesiology, First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Mei Liu
- Department of Anesthesiology, First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Jinxiu Yan
- Department of Anesthesiology, First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Na Zhao
- Department of Anesthesiology, First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Liangchao Qu
- Department of Anesthesiology, First Affiliated Hospital of Nanchang University, Nanchang 330006, China
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Angiotensin II induces cognitive decline and anxiety-like behavior via disturbing pattern of theta-gamma oscillations. Brain Res Bull 2021; 174:84-91. [PMID: 34090935 DOI: 10.1016/j.brainresbull.2021.06.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/13/2021] [Accepted: 06/01/2021] [Indexed: 01/11/2023]
Abstract
Hypertension is the most common chronic disease accompanied by cognitive decline and anxiety-like behavior. Angiotensin II (Ang II) induces hypertension by activating angiotensin II receptor subtype 1 (AT1R). The purpose of the study was to examine the potential underlying mechanism of alterations in cognition and anxiety-like behavior induced by Ang II. Adult C57 mice were intraperitoneal injected with either 1 mg/kg/d Ang II or saline individually for 14 consecutive days. Ang II resulted in cognitive decline and anxious like behavior in C57 mice. Moreover, Ang II disturbed bidirectional synaptic plasticity and neural oscillation coupling between high theta and gamma on PP (perforant pathway)-DG (dentate gyrus) pathway. In addition, Ang II decreased the expression of N-methyl-d-aspartate receptor (NR) 2A and NR 2B and increased the expression of GABAAR α1. The data suggest that Ang II disturb neural oscillations via altering excitatory and inhibitory (E/I) balance and eventually damage cognition and anxiety-like behavior in mice.
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14
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Chen Q, Lei YQ, Liu JF, Wang ZC, Cao H. Triptolide improves neurobehavioral functions, inflammation, and oxidative stress in rats under deep hypothermic circulatory arrest. Aging (Albany NY) 2021; 13:3031-3044. [PMID: 33465048 PMCID: PMC7880355 DOI: 10.18632/aging.202460] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 12/10/2020] [Indexed: 11/25/2022]
Abstract
This study investigated the neuroprotective effects of triptolide (TPL) in a rat model of cardiopulmonary bypass with deep hypothermia circulatory arrest (DHCA). Rats were randomly divided into six groups: control, sham, DHCA, and DHCA + TPL (100, 200, 300 μg/kg). Neurobehavioral functions were measured using the elevated plus-maze, Y-maze, and Morris water maze tests. Levels of inflammatory cytokines, oxidative stress indices, and brain neurotrophins were measured by ELISA. Microglial activation and cell death was measured by immunofluorescence staining and TUNEL assay, respectively. Finally, activation of the Nrf2 pathway and NF-κB were detected by western blot. The elevated plus-maze, Y-maze, and Morris water maze tests all showed that TPL mitigated anxiety-like behavior, working memory, spatial learning, and memory in DHCA rats. TPL inhibited inflammatory responses and oxidative stress, as well as increased brain neurotrophin levels in DHCA rats. Moreover, TPL attenuated microglia activation and cell death in DHCA rats. Finally, TPL activated the Nrf2 pathway and inhibited NF-κB activity in DHCA rats. These results demonstrated that TPL improved neurobehavioral functions, neuroinflammation, and oxidative stress in DHCA rats, which may be associated with the Nrf2 and NF-κB pathways.
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Affiliation(s)
- Qiang Chen
- Department of Cardiac Surgery, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou 350001, P. R. China
| | - Yu-Qing Lei
- Department of Cardiac Surgery, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou 350001, P. R. China
| | - Jian-Feng Liu
- Department of Cardiac Surgery, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou 350001, P. R. China
| | - Zeng-Chun Wang
- Department of Cardiac Surgery, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou 350001, P. R. China
| | - Hua Cao
- Department of Cardiac Surgery, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou 350001, P. R. China
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15
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Chen SY, Gao Y, Sun JY, Meng XL, Yang D, Fan LH, Xiang L, Wang P. Traditional Chinese Medicine: Role in Reducing β-Amyloid, Apoptosis, Autophagy, Neuroinflammation, Oxidative Stress, and Mitochondrial Dysfunction of Alzheimer's Disease. Front Pharmacol 2020; 11:497. [PMID: 32390843 PMCID: PMC7188934 DOI: 10.3389/fphar.2020.00497] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 03/30/2020] [Indexed: 12/19/2022] Open
Abstract
Alzheimer's disease (AD) is a progressive age-related neurodegenerative disease characterized by memory loss and cognitive impairment. The major characteristics of AD are amyloid β plaques, apoptosis, autophagy dysfunction, neuroinflammation, oxidative stress, and mitochondrial dysfunction. These are mostly used as the significant indicators for selecting the effects of potential drugs. It is imperative to explain AD pathogenesis and realize productive treatments. Although the currently used chemical drugs for clinical applications of AD are effective in managing the symptoms, they are inadequate to achieve anticipated preventive or therapeutic outcomes. There are new strategies for treating AD. Traditional Chinese Medicine (TCM) has accumulated thousands of years of experience in treating dementia. Nowadays, numerous modern pharmacological studies have verified the efficacy of many bioactive ingredients isolated from TCM for AD treatment. In this review, representative TCM for the treatment of AD are discussed, and among these herbal medicines, the Lamiaceae family accounts for the highest proportion. It is concluded that monomers and extracts from TCM have potential therapeutic effect for AD treatment.
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Affiliation(s)
- Shi-Yu Chen
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yue Gao
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jia-Yi Sun
- Innovative Institute of Chinese Medicine and Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Xian-Li Meng
- Innovative Institute of Chinese Medicine and Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Dong Yang
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Lin-Hong Fan
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Li Xiang
- Innovative Institute of Chinese Medicine and Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Ping Wang
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
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16
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Ma L, Yang C, Zheng J, Chen Y, Xiao Y, Huang K. Non-polyphenolic natural inhibitors of amyloid aggregation. Eur J Med Chem 2020; 192:112197. [PMID: 32172082 DOI: 10.1016/j.ejmech.2020.112197] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 02/09/2020] [Accepted: 02/28/2020] [Indexed: 02/07/2023]
Abstract
Protein misfolding diseases (PMDs) are chronic and progressive, with no effective therapy so far. Aggregation and misfolding of amyloidogenic proteins are closely associated with the onset and progression of PMDs, such as amyloid-β (Aβ) in Alzheimer's disease, α-Synuclein (α-Syn) in Parkinson's disease and human islet amyloid polypeptide (hIAPP) in type 2 diabetes. Inhibiting toxic aggregation of amyloidogenic proteins is regarded as a promising therapeutic approach in PMDs. The past decade has witnessed the rapid progresses of this field, dozens of inhibitors have been screened and verified in vitro and in vivo, demonstrating inhibitory effects against the aggregation and misfolding of amyloidogenic proteins, together with beneficial effects. Natural products are major sources of small molecule amyloid inhibitors, a number of natural derived compounds have been identified with great bioactivities and translational prospects. Here, we review the non-polyphenolic natural inhibitors that potentially applicable for PMDs treatment, along with their working mechanisms. Future directions are proposed for the development and clinical applications of these inhibitors.
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Affiliation(s)
- Liang Ma
- Affiliated Wuhan Mental Health Center, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China
| | - Chen Yang
- Tongji School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China
| | - Jiaojiao Zheng
- Tongji School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China
| | - Yuchen Chen
- Tongji School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China
| | - Yushuo Xiao
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan, 430035, China
| | - Kun Huang
- Tongji School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China.
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17
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Yuan K, Li X, Lu Q, Zhu Q, Jiang H, Wang T, Huang G, Xu A. Application and Mechanisms of Triptolide in the Treatment of Inflammatory Diseases-A Review. Front Pharmacol 2019; 10:1469. [PMID: 31866868 PMCID: PMC6908995 DOI: 10.3389/fphar.2019.01469] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Accepted: 11/13/2019] [Indexed: 12/19/2022] Open
Abstract
Bioactive compounds from medicinal plants with anti-inflammatory and immunosuppressive effects have been emerging as important sources of drugs for the treatment of inflammatory disorders. Triptolide, a diterpene triepoxide, is a pharmacologically active compound isolated from Tripterygium wilfordii Hook F (TwHF) that is used as a remedy for inflammatory and autoimmune diseases. As the most promising bioactive compound obtained from TwHF, triptolide has attracted considerable interest recently, especially for its potent anti-inflammatory and immunosuppressive activities. Over the past few years, an increasing number of studies have been published emphasizing the value of triptolide in the treatment of diverse inflammatory disorders. Here, we systematically review the mechanism of action and the therapeutic properties of triptolide in various inflammatory diseases according to different systematic organs, including lupus nephritis, inflammatory bowel disease, asthma, and rheumatoid arthritis with pubmed and Embase. Based on this review, potential research strategies might contribute to the clinical application of triptolide in the future.
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Affiliation(s)
- Kai Yuan
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing, China
| | - Xiaohong Li
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing, China
| | - Qingyi Lu
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing, China
| | - Qingqing Zhu
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing, China
| | - Haixu Jiang
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing, China
| | - Ting Wang
- Beijing Research Institute of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Guangrui Huang
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing, China
| | - Anlong Xu
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing, China.,State Key Laboratory of Biocontrol, Department of Biochemistry, School of Life Sciences, Sun Yat-Sen (Zhongshan) University, Guangzhou, China
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18
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Cuevas E, Rosas-Hernandez H, Burks SM, Ramirez-Lee MA, Guzman A, Imam SZ, Ali SF, Sarkar S. Amyloid Beta 25-35 induces blood-brain barrier disruption in vitro. Metab Brain Dis 2019; 34:1365-1374. [PMID: 31267346 DOI: 10.1007/s11011-019-00447-8] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 06/05/2019] [Indexed: 11/27/2022]
Abstract
The amyloid β-peptide (Aβ) is transported across the blood-brain barrier (BBB) by binding with the receptor for advanced glycation end products (RAGE). Previously, we demonstrated that the Aβ fraction 25-35 (Aβ25-35) increases RAGE expression in the rat hippocampus, likely contributing to its neurotoxic effects. However, it is still debated if the interaction of Aβ with RAGE compromises the BBB function in Alzheimer' disease (AD). Here, we evaluated the effects of Aβ25-35 in an established in vitro model of the BBB. Rat brain microvascular endothelial cells (rBMVECs) were treated with 20 μM active Aβ25-35 or the inactive Aβ35-25 (control), for 24 h. Exposure to Aβ25-35 significantly decreased cell viability, increased cellular necrosis, and increased the production of reactive oxygen species (ROS), which triggered a decrease in the enzyme glutathione peroxidase when compared to the control condition. Aβ25-35 also increased BBB permeability by altering the expression of tight junction proteins (decreasing zonula occludens-1 and increasing occludin). Aβ25-35 induced monolayer disruption and cellular disarrangement of the BBB, with RAGE being highly expressed in the zones of disarrangement. Together, these data suggest that Aβ25-35-induces toxicity by compromising the functionality and integrity of the BBB in vitro. Graphical abstract Aβ25-35 induces BBB dysfunction in vitro, wich is likely mediated by OS and ultimately leads to disruption of BBB integrity and cell death.
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Affiliation(s)
- Elvis Cuevas
- Division of Neurotoxicology, National Center for Toxicological Research/U.S. Food and Drug Administration, Jefferson, AR, 72079, USA.
| | - Hector Rosas-Hernandez
- Division of Neurotoxicology, National Center for Toxicological Research/U.S. Food and Drug Administration, Jefferson, AR, 72079, USA
| | - Susan M Burks
- Division of Neurotoxicology, National Center for Toxicological Research/U.S. Food and Drug Administration, Jefferson, AR, 72079, USA
| | - Manuel A Ramirez-Lee
- Division of Neurotoxicology, National Center for Toxicological Research/U.S. Food and Drug Administration, Jefferson, AR, 72079, USA
| | - Aida Guzman
- Escuela Nacional Preparatoria-UNAM, Mexico, Mexico
| | - Syed Z Imam
- Division of Neurotoxicology, National Center for Toxicological Research/U.S. Food and Drug Administration, Jefferson, AR, 72079, USA
| | - Syed F Ali
- Division of Neurotoxicology, National Center for Toxicological Research/U.S. Food and Drug Administration, Jefferson, AR, 72079, USA
| | - Sumit Sarkar
- Division of Neurotoxicology, National Center for Toxicological Research/U.S. Food and Drug Administration, Jefferson, AR, 72079, USA
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19
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Wang Y, Zhang S, Li Z, Zeng H, Xian H, Huang Y. The effects of triptolide on the cellular activity of cryopreserved rat sciatic nerves and nerve regeneration after allotransplantation. Int J Neurosci 2019; 130:83-96. [PMID: 31487203 DOI: 10.1080/00207454.2019.1664512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Purpose: To investigate the effects of triptolide (T10) on the cellular activity of cryopreserved rat sciatic nerves and nerve regeneration after allotransplantation.Materials and methods: After the optimal T10 concentration was determine, sciatic nerve fragments from Sprague-Dawley (SD) rats were randomly divided into 5 groups: the fresh nerve group (group A), the Dulbecco's modified Eagle's medium (DMEM)-preservation group (group B), the T10-preservation group (group C), the T10-pretreatment, DMEM-preservation group (group D), and the T10-pretreatment, T10-preservation group (group E). The nerves in the preservation groups were preserved at 4 °C for 4 w. Then, either cryopreserved or fresh nerves were used to repair 10-mm sciatic nerve defects in Wistar rats (group A', group B', group C', group D', and group E', which correspond to the nerve groups described above); in addition, one fresh homologous transplantation group (group F') was established.Results: Nerve growth factor (NGF) was expressed at significantly higher levels in the groups treated with the T10 solution at 37 °C. After rat sciatic nerves were cryopreserved for 4 w, group E had increased numbers of live nerve cells and increased levels of biological activity (P < 0.001) and reduced levels of immunogenicity (P < 0.001) when compared with those for the other groups. Sixteen weeks after transplantation, recipient nerve regeneration in group E' was increased compared with that in groups A', B', C', and D' (P < 0.05).Conclusions: The application of T10 in vitro induced the expression of neurotrophic factors in rat sciatic nerves, increased the biological activity of cryopreserved nerves, reduced immunogenicity, and promoted recipient nerve regeneration after allotransplantation.
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Affiliation(s)
- Yi Wang
- Chongqing Key Laboratory of Traditional Chinese Medicine for Prevention and Cure of Metabolic Diseases, Chongqing Medical University, Chongqing, China
| | - Song Zhang
- Chongqing Key Laboratory of Traditional Chinese Medicine for Prevention and Cure of Metabolic Diseases, Chongqing Medical University, Chongqing, China
| | - Zijian Li
- Chongqing Key Laboratory of Traditional Chinese Medicine for Prevention and Cure of Metabolic Diseases, Chongqing Medical University, Chongqing, China
| | - Huanhuan Zeng
- Chongqing Key Laboratory of Traditional Chinese Medicine for Prevention and Cure of Metabolic Diseases, Chongqing Medical University, Chongqing, China
| | - Hua Xian
- Chongqing Key Laboratory of Traditional Chinese Medicine for Prevention and Cure of Metabolic Diseases, Chongqing Medical University, Chongqing, China
| | - Yingru Huang
- Chongqing Key Laboratory of Traditional Chinese Medicine for Prevention and Cure of Metabolic Diseases, Chongqing Medical University, Chongqing, China
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20
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Lv H, Jiang L, Zhu M, Li Y, Luo M, Jiang P, Tong S, Zhang H, Yan J. The genus Tripterygium: A phytochemistry and pharmacological review. Fitoterapia 2019; 137:104190. [DOI: 10.1016/j.fitote.2019.104190] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 05/29/2019] [Accepted: 05/30/2019] [Indexed: 12/15/2022]
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21
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Xu P, Li Y, Yu Z, Yang L, Shang R, Yan Z. Protective Effect of Vitamin C on Triptolide-induced Acute Hepatotoxicity in Mice through mitigation of oxidative stress. AN ACAD BRAS CIENC 2019; 91:e20181257. [PMID: 31241707 DOI: 10.1590/0001-3765201920181257] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 03/13/2019] [Indexed: 01/28/2023] Open
Abstract
Triptolide, a purified diterpenoid from the herb Tripterygium wilfordii Hook.f., was widely used to treat many diseases. However, the hepatotoxicity of triptolide limited its clinical use. Research showed oxidative stress played an important role in triptolide-induced liver injury. To investigate the effect of vitamin C, which was one of the most effective antioxidants, on triptolide-induced hepatotoxicity and its potential mechanism in mice. In the present study, acute liver injury was induced by intraperitoneal injection of triptolide and vitamin C was orally administered. The results showed treatment with vitamin C prevented the triptolide-induced liver injury by reducing the levels of aspartate transaminase from 286.86 to 192.48 U/mL and alanine aminotransferase from 746.75 to 203.36 U/mL. Histopathological changes of liver corresponded to the same trend. Furthermore, vitamin C also protected the liver against triptolide-induced oxidative stress by inhibiting the generation of malondialdehyde (2.22 to 1.49 nmol/mgprot) and hydrogen peroxide (14.74 to 7.19 mmol/gprot) and restoring the level of total superoxide dismutase (24.32 to 42.55 U/mgprot) and glutathione (7.69 to 13.03 μg/mgprot). These results indicated that vitamin C could protect against triptolide-induced liver injury via reducing oxidative stress, and vitamin C may pose a significant health protection in the clinical use of triptolide.
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Affiliation(s)
- Pengjuan Xu
- School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Youyou Li
- School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Zhichao Yu
- Scientific Research Office, Tianjin Sino-German University of Applied Sciences, Tianjin 300350, China
| | - Lin Yang
- School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Rong Shang
- School of Nursing, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Zihang Yan
- College of Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
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22
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Wang Y, Zhang Y, Zhang X, Yang T, Liu C, Wang P. Alcohol Dehydrogenase 1B Suppresses β-Amyloid-Induced Neuron Apoptosis. Front Aging Neurosci 2019; 11:135. [PMID: 31231206 PMCID: PMC6560161 DOI: 10.3389/fnagi.2019.00135] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 05/21/2019] [Indexed: 01/01/2023] Open
Abstract
β-amyloid (Aβ) deposition, neurofibrillary tangles induced by phosphorylation of tau protein, and neuronal apoptosis are pathological hallmarks of Alzheimer’s disease (AD). The dementia rate in alcoholic abusers were found to be higher than in control people. The present study explored the potential roles of alcohol dehydrogenase 1B (ADH1B) in AD pathology by determining the ADH1B levels in AD patient sera, in the hippocampus of APP/PS-1 AD model mice, and in an AD model cell line treated with Aβ1-42. The results show that ADH1B levels decreased significantly both in the serum of AD patients and in the hippocampus of APP/PS-1 AD model mice. In addition, the apoptotic rate was reduced and viability was significantly increased in AD model cells transfected with ADH1B overexpression vector. The levels of the p75 neurotrophin receptor (p75NTR), an Aβ1-42 receptor, were down-regulated in the ADH1B overexpressing AD model cell and up-regulated in cells transfected with the shRNA vector of ADH1B. Protein levels of cleaved caspase-3 and Bax decreased significantly, whereas Bcl-2 levels increased in cells overexpressing ADH1B. The opposite trend was observed for cleaved caspase-3, Bax, and Bcl-2 levels in cells transfected with the shRNA vector of ADH1B. The levels of reactive oxygen species (ROS) were found to be reduced in ADH1B overexpressing cells and increased when cells were transfected with the shRNA vector of ADH1B. These results indicate that ADH1B might be important in the prevention of AD, especially for abusers of alcohol, and a potential new target of AD treatment.
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Affiliation(s)
- Yaqi Wang
- Clinical Laboratory of Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Yi Zhang
- Clinical Laboratory of Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Xiaomin Zhang
- Clinical Laboratory of Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Tingting Yang
- Clinical Laboratory of Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Chengeng Liu
- Clinical Laboratory of Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Peichang Wang
- Clinical Laboratory of Xuanwu Hospital, Capital Medical University, Beijing, China
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23
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Low-molecular-weight chondroitin sulfate attenuated injury by inhibiting oxidative stress in amyloid β-treated SH-SY5Y cells. Neuroreport 2019; 29:1174-1179. [PMID: 29985831 DOI: 10.1097/wnr.0000000000001092] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The neurotoxicity of aggregated amyloid β (Aβ) has been implicated as a critical cause in the pathogenesis of Alzheimer's disease. In a previous work, we have shown that low-molecular-weight chondroitin sulfate (LMWCS), a derivative of chondroitin sulfate, protected the SH-SY5Y neuroblastoma cells from Aβ25-35-induced neurotoxicity, decreased intracellular reactive oxygen species level and inhibited the cell apoptosis. However, the underlying mechanism of the antioxidative effect of LMWCS in the SH-SY5Y cells has not been well explored. In the present study, the SH-SY5Y cells were cultured and exposed to 30 μM Aβ25-35 in the absence or presence of LMWCS (50, 100 and 200 μg/ml). Results indicate that incubation of cells with LMWCS before Aβ25-35 exposure increased superoxide dismutase, glutathione peroxidase and Na/K-ATPase activities and decreased the malondialdehyde content. In addition, LMWCS inhibited the imbalance of Bcl-2 and Bax and decreased caspase-3 and caspase-9 expressions. LMWCS antagonizes Aβ25-35-induced neurotoxicity by attenuating oxidative stress, and our results suggest that LMWCS might be used as a potential compound for Alzheimer's disease prevention.
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24
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Du S, Zhang Y, Yang J, Liu X, Wang Y, Xu B, Jia J. Curcumin Alleviates β Amyloid-Induced Neurotoxicity in HT22 Cells via Upregulating SOD2. J Mol Neurosci 2019; 67:540-549. [PMID: 30746607 DOI: 10.1007/s12031-019-01267-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 01/21/2019] [Indexed: 12/06/2022]
Abstract
Curcumin protects neuronal cells exposed to β amyloid (Aβ); the mechanism, however, is still obscure. The aim of this study is to determine whether the type 2 superoxide dismutase (SOD2) mediates curcumin-induced protective effects in Aβ-treated neuronal cells. In this study, the HT22 neuronal cells were exposed to Aβ to imitate neuronal injury in Alzheimer's disease (AD). After 24-h treatment, 10 μM Aβ decreased cell viability and mitochondrial functions, including mitochondrial complex activities and mitochondrial membrane potential (MMP), and also downregulated anti-oxidants SOD2, glutathione (GSH), and catalase (CAT) levels (P < 0.05), meanwhile, increased lactic dehydrogenase (LDH) release, apoptosis level, intracellular reactive oxygen species (ROS) and mitochondrial superoxide accumulation (P < 0.05). And, co-administration of 1 μM curcumin significantly reduced the Aβ-induced cell injury and oxidative damage above (P < 0.05). Downregulating SOD2 by using small interfering RNA (siRNA), however, significantly abolished the curcumin-induced protective and anti-oxidative effects in HT22 cells (P < 0.05); the scramble (SC)-siRNA did not cause marked effects on the curcumin-induced protective effects (P > 0.05). These findings showed that curcumin can alleviate Aβ-induced injury in neuronal cells, and SOD2 protein may mediate the neuroprotective effects.
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Affiliation(s)
- Shuping Du
- Department of Anesthesiology, Weihai Municipal Hospital, Weihai, 264200, China
| | - Yuanyuan Zhang
- Department of 1st Geriatrics, General Hospital of Southern Theatre Command of PLA, Guangzhou, 510010, China
| | - Jing Yang
- Southern Medical University, Guangzhou, 510515, China.,Department of Anesthesiology, General Hospital of Southern Theatre Command of PLA, Guangzhou, 510010, China
| | - Xiaoyan Liu
- Department of Anesthesiology, General Hospital of Southern Theatre Command of PLA, Guangzhou, 510010, China
| | - Yuqing Wang
- Department of Rehabilitation, General Hospital of Southern Theatre Command of PLA, Guangzhou, 510010, China
| | - Bo Xu
- Department of Anesthesiology, General Hospital of Southern Theatre Command of PLA, Guangzhou, 510010, China.
| | - Ji Jia
- Department of Anesthesiology, General Hospital of Southern Theatre Command of PLA, Guangzhou, 510010, China.
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25
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Ma Y, Xiong L. Astragaloside IV ameliorates endoplasmic reticulum stress‑induced apoptosis of Aβ25‑35‑treated PC12 cells by inhibiting the p38 MAPK signaling pathway. Mol Med Rep 2019; 19:2005-2012. [PMID: 30664172 PMCID: PMC6390062 DOI: 10.3892/mmr.2019.9855] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 09/10/2018] [Indexed: 12/12/2022] Open
Abstract
Endoplasmic reticulum stress (ERS) serves a vital role in the pathological development of Alzheimer's disease (AD). ERS can promote programmed cell death (apoptosis) during AD; however, the specific molecular mechanisms that lead to ERS remain unclear. It is very important that a drug for the treatment of AD is identified. Our previous studies indicated that astragaloside IV (AST IV) has anti-inflammatory effects and helps cells resist oxidative stress. In the present study, western blotting and reverse transcription semi-quantitative polymerase chain reaction were used to detect protein and mRNA expression levels, flow cytometry was used to measure intracellular reactive oxygen species (ROS) levels, and superoxide dismutase (SOD) and malondialdehyde (MDA) activity was detected using commercially available kits. The results demonstrated that SOD activity was decreased, and MDA content, ROS levels, and the expression levels of p38 mitogen-activated protein kinase (MAPK) and ERS-associated proteins, including binding immunoglobulin protein/glucose-regulated protein and growth arrest- and DNA damage -inducible gene 153/C/EBP homologous protein, were increased in amyloid β (Aβ)25-35-treated PC12 cells. Furthermore, to investigate the role of p38 MAPK and the effects of AST IV in an in vitro model of AD, SB203580, a p38 MAPK signaling pathway inhibitor, and AST IV were administered to Aβ25-35-treated PC12 cells. The results revealed that AST IV protected the cells against AD. This effect may be caused by decreases in ROS levels, which may inhibit the p38 MAPK signaling pathway and thereby suppress ERS in Aβ25-35-treated PC12 cells.
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Affiliation(s)
- Yuhong Ma
- Department of Diagnostics, Wannan Medical College, Wuhu, Anhui 241001, P.R. China
| | - Li Xiong
- Department of Diagnostics, Wannan Medical College, Wuhu, Anhui 241001, P.R. China
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Yang BY, Han W, Han H, Liu Y, Guan W, Li XM, Kuang HX. Effects of Lignans from Schisandra chinensis Rattan Stems against Aβ 1-42-Induced Memory Impairment in Rats and Neurotoxicity in Primary Neuronal Cells. Molecules 2018; 23:molecules23040870. [PMID: 29642617 PMCID: PMC6017482 DOI: 10.3390/molecules23040870] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 04/05/2018] [Accepted: 04/07/2018] [Indexed: 12/16/2022] Open
Abstract
Oxidative stress, which is caused by Amyloid-β deposition in brain, plays an important role in Alzheimer’s disease. In this study, we found that lignans from Schisandra chinensis rattan stems (rsSCH-L) could reduce the escape latency and the distance travelled by the Aβ1–42 injected rats while the crossing platform time was enhanced in the Morris water maze test. Further research demonstrated that lignans from rsSCH-L attenuated Aβ1-42-induced neuronal cell injury by increasing the content of SOD and GSH-Px and decreasing the levels of LDH, ROS, and MDA. Moreover, rsSCH-L also inhibited the apoptosis of primary neuronal cells. The mechanisms of the apoptosis were related with the downregulation of caspase-3, caspase-8, Bax, and upregulation of Bcl-2. Taken together, the results show that rsSCH-L can improve cognitive ability in vivo. Meanwhile rsSCH-L exhibit a neuroprotective environment against oxidative stress and apoptosis in vitro. Therefore, rsSCH-L may be a potential therapeutic agent for this neurodegenerative disease.
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Affiliation(s)
- Bing-You Yang
- Key Laboratory of Chinese Materia Medica, Ministry of Education of Heilongjiang University of Chinese Medicine, Harbin 150040, China.
| | - Wei Han
- Key Laboratory of Chinese Materia Medica, Ministry of Education of Heilongjiang University of Chinese Medicine, Harbin 150040, China.
| | - Hua Han
- Key Laboratory of Chinese Materia Medica, Ministry of Education of Heilongjiang University of Chinese Medicine, Harbin 150040, China.
| | - Yan Liu
- Key Laboratory of Chinese Materia Medica, Ministry of Education of Heilongjiang University of Chinese Medicine, Harbin 150040, China.
| | - Wei Guan
- Key Laboratory of Chinese Materia Medica, Ministry of Education of Heilongjiang University of Chinese Medicine, Harbin 150040, China.
| | - Xiao-Mao Li
- Key Laboratory of Chinese Materia Medica, Ministry of Education of Heilongjiang University of Chinese Medicine, Harbin 150040, China.
| | - Hai-Xue Kuang
- Key Laboratory of Chinese Materia Medica, Ministry of Education of Heilongjiang University of Chinese Medicine, Harbin 150040, China.
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Wang Y, Guo SH, Shang XJ, Yu LS, Zhu JW, Zhao A, Zhou YF, An GH, Zhang Q, Ma B. Triptolide induces Sertoli cell apoptosis in mice via ROS/JNK-dependent activation of the mitochondrial pathway and inhibition of Nrf2-mediated antioxidant response. Acta Pharmacol Sin 2018; 39:311-327. [PMID: 28905938 DOI: 10.1038/aps.2017.95] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2017] [Accepted: 06/19/2017] [Indexed: 01/01/2023] Open
Abstract
Triptolide (TP), an oxygenated diterpene, has a variety of beneficial pharmacodynamic activities but its clinical applications are restricted due to severe testicular injury. This study aimed to delineate the molecular mechanisms of TP-induced testicular injury in vitro and in vivo. TP (5-50000 nmol/L) dose-dependently decreased the viability of TM4 Sertoli cells with an IC50 value of 669.5-269.45 nmol/L at 24 h. TP (125, 250, and 500 nmol/L) dose-dependently increased the accumulation of ROS, the phosphorylation of JNK, mitochondrial dysfunction and activation of the intrinsic apoptosis pathway in TM4 cells. These processes were attenuated by co-treatment with the antioxidant N-acetyl cysteine (NAC, 1 mmol/L). Furthermore, TP treatment inhibited the translocation of Nrf2 from cytoplasm into the nucleus as well as the expression of downstream genes NAD(P)H quinone oxidoreductase1 (NQO1), catalase (CAT) and hemeoxygenase 1 (HO-1), thus abrogating Nrf2-mediated defense mechanisms against oxidative stress. Moreover, siRNA knockdown of Nrf2 significantly potentiated TP-induced apoptosis of TM4 cells. The above results from in vitro experiments were further validated in male mice after oral administration of TP (30, 60, and 120 mg·kg-1·d-1, for 14 d), as evidenced by the detected indexes, including dose-dependently decreased SDH activity, increased MDA concentration, altered testicle histomorphology, elevated caspase-3 activation, apoptosis induction, increased phosphorylation of JNK, and decreased gene expression of NQO1, CAT and HO-1 as well as nuclear protein expression of Nrf2 in testicular tissue. Our results demonstrate that TP activates apoptosis of Sertoli cells and injury of the testis via the ROS/JNK-mediated mitochondrial-dependent apoptosis pathway and down-regulates Nrf2 activation.
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Wang P, Wang ZY. Metal ions influx is a double edged sword for the pathogenesis of Alzheimer's disease. Ageing Res Rev 2017; 35:265-290. [PMID: 27829171 DOI: 10.1016/j.arr.2016.10.003] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2016] [Revised: 09/08/2016] [Accepted: 10/17/2016] [Indexed: 12/17/2022]
Abstract
Alzheimer's disease (AD) is a common form of dementia in aged people, which is defined by two pathological characteristics: β-amyloid protein (Aβ) deposition and tau hyperphosphorylation. Although the mechanisms of AD development are still being debated, a series of evidence supports the idea that metals, such as copper, iron, zinc, magnesium and aluminium, are involved in the pathogenesis of the disease. In particular, the processes of Aβ deposition in senile plaques (SP) and the inclusion of phosphorylated tau in neurofibrillary tangles (NFTs) are markedly influenced by alterations in the homeostasis of the aforementioned metal ions. Moreover, the mechanisms of oxidative stress, synaptic plasticity, neurotoxicity, autophagy and apoptosis mediate the effects of metal ions-induced the aggregation state of Aβ and phosphorylated tau on AD development. More importantly, imbalance of these mechanisms finally caused cognitive decline in different experiment models. Collectively, reconstructing the signaling network that regulates AD progression by metal ions may provide novel insights for developing chelators specific for metal ions to combat AD.
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Affiliation(s)
- Pu Wang
- College of Life and Health Sciences, Northeastern University, No. 3-11, Wenhua Road, Shenyang, 110819, PR China.
| | - Zhan-You Wang
- College of Life and Health Sciences, Northeastern University, No. 3-11, Wenhua Road, Shenyang, 110819, PR China.
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