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An D, Xu Y. Environmental risk factors provoke new thinking for prevention and treatment of dementia with Lewy bodies. Heliyon 2024; 10:e30175. [PMID: 38707435 PMCID: PMC11068646 DOI: 10.1016/j.heliyon.2024.e30175] [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: 01/05/2024] [Revised: 04/09/2024] [Accepted: 04/22/2024] [Indexed: 05/07/2024] Open
Abstract
In recent years, environmental factors have received attention in the pathogenesis of neurodegenerative diseases. Other than genetic factors, the identification of environmental factors and modifiable risk factors may create opportunities to delay the onset or slow the progression of Lewy body disease. Researchers have made significant progress in understanding environmental and modifiable risk factors over the past 30 years. To date, despite the increasing number of articles assessing risk factors for Lewy body disease, few reviews have focused on their role in its onset. In this review, we reviewed the literature investigating the relationship between Lewy body disease and several environmental and other modifiable factors. We found that some air pollutants, exposure to some metals, and infection with some microorganisms may increase the risk of Lewy body disease. Coffee intake and the Mediterranean diet are protective factors. However, it is puzzling that low educational levels and smoking may have some protective effects. In addition, we proposed specific protocols for subsequent research directions on risk factors for neurodegenerative diseases and improved methods. By conducting additional case-control studies, we could explore the role of these factors in the etiopathogenesis of Lewy body disease, establishing a foundation for strategies aimed at preventing and reducing the onset and burden of the disease.
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Affiliation(s)
- Dinghao An
- Department of Neurology, Nanjing Drum Tower Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Nanjing, China
- Department of Neurology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Yun Xu
- Department of Neurology, Nanjing Drum Tower Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Nanjing, China
- Department of Neurology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
- State Key Laboratory of Pharmaceutical Biotechnology and Institute of Translational Medicine for Brain Critical Diseases, Nanjing University, Nanjing, China
- Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, China
- Nanjing Neurology Clinical Medical Center, Nanjing, China
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Zhu S, Liu J, Wang Q, Yang Y, Du L, Qiu X, Qi R, Wang J. Resolvin D1 alleviates apoptosis triggered by endoplasmic reticulum stress in IPEC-J2 cells. BMC Vet Res 2024; 20:125. [PMID: 38561794 PMCID: PMC10983747 DOI: 10.1186/s12917-023-03820-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 11/22/2023] [Indexed: 04/04/2024] Open
Abstract
BACKGROUND Resolvin D1 (RvD1), a specialized pro-resolving lipid mediator (SPM), is derived from docosahexaenoic acid (DHA). It plays a key role in actively resolving inflammatory responses, which further reduces small intestinal damage. However, its regulation of the apoptosis triggered by endoplasmic reticulum (ER) stress in intestinal epithelial cells is still poorly understood. The intestinal porcine epithelial cells (IPEC-J2) were stimulated with tunicamycin to screen an optimal stimulation time and concentration to establish an ER stress model. Meanwhile, RvD1 (0, 1, 10, 20, and 50 nM) cytotoxicity and its impact on cell viability and the effective concentration for reducing ER stress and apoptosis were determined. Finally, the effects of RvD1 on ER stress and associated apoptosis were furtherly explored by flow cytometry analysis, AO/EB staining, RT-qPCR, and western blotting. RESULTS The ER stress model of IPEC-J2 cells was successfully built by stimulating the cells with 1 µg/mL tunicamycin for 9 h. Certainly, the increased apoptosis and cell viability inhibition also appeared under the ER stress condition. RvD1 had no cytotoxicity, and its concentration of 1 nM significantly decreased cell viability inhibition (p= 0.0154) and the total apoptosis rate of the cells from 14.13 to 10.00% (p= 0.0000). RvD1 at the concentration of 1 nM also significantly reduced the expression of glucose-regulated protein 78 (GRP-78, an ER stress marker gene) (p= 0.0000) and pro-apoptotic gene Caspase-3 (p= 0.0368) and promoted the expression of B cell lymphoma 2 (Bcl-2, an anti-apoptotic gene)(p= 0.0008). CONCLUSIONS Collectively, the results shed light on the potential of RvD1 for alleviating apoptosis triggered by ER stress, which may indicate an essential role of RvD1 in maintaining intestinal health and homeostasis.
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Affiliation(s)
- Siyuan Zhu
- Chongqing Academy of Animal Sciences, Chongqing, 402460, P. R. China
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, P. R. China
| | - Jingbo Liu
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, P. R. China
| | - Qi Wang
- Chongqing Academy of Animal Sciences, Chongqing, 402460, P. R. China
| | - Yong Yang
- Chongqing Academy of Animal Sciences, Chongqing, 402460, P. R. China
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, P. R. China
| | - Lei Du
- Chongqing Academy of Animal Sciences, Chongqing, 402460, P. R. China
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, P. R. China
| | - Xiaoyu Qiu
- Chongqing Academy of Animal Sciences, Chongqing, 402460, P. R. China
| | - Renli Qi
- Chongqing Academy of Animal Sciences, Chongqing, 402460, P. R. China.
| | - Jing Wang
- Chongqing Academy of Animal Sciences, Chongqing, 402460, P. R. China.
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3
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Fan H, Guo Z. Tumor microenvironment-responsive manganese-based nanomaterials for cancer treatment. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2023.215027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Liu C, Ju R. Manganese-induced neuronal apoptosis: new insights into the role of endoplasmic reticulum stress in regulating autophagy-related proteins. Toxicol Sci 2023; 191:193-200. [PMID: 36519822 DOI: 10.1093/toxsci/kfac130] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Manganese (Mn) is an essential trace element that participates in various physiological and pathological processes. However, epidemiological observations indicate that overexposure to Mn is strongly associated with neurodegenerative disorders and has been recognized as a potential risk factor of neuronal apoptosis. Many mechanisms are involved in the pathogenesis of Mn-induced neuronal apoptosis, such as reactive oxygen species generation, neuroinflammation reactions, protein accumulation, endoplasmic reticulum stress (ER stress), and autophagy, all of which collectively accelerate the process of nerve cell damage. As sophisticated cellular processes for maintaining intracellular homeostasis, ER-mediated unfolded protein response and autophagy both play bilateral roles including cell protection and cell injury under pathophysiological conditions, which might interact with each other. Although emerging evidence suggests that ER stress is involved in regulating the compensatory activation of autophagy to promote cell survival, the inherent relationship between ER stress and autophagy on Mn-induced neurotoxicity remains obscure. Here, our review focuses on discussing the existing mechanisms and connections between ER stress, autophagy, and apoptosis, which provide a new perspective on Mn-induced neuronal apoptosis, and the pathogenesis of neurodegenerative diseases.
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Affiliation(s)
- Chang Liu
- School of Medicine, University of Electronic Science and Technology of China, Chengdu Women's and Children's Central Hospital, Chengdu 611731, China
| | - Rong Ju
- School of Medicine, University of Electronic Science and Technology of China, Chengdu Women's and Children's Central Hospital, Chengdu 611731, China
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Pajarillo E, Nyarko-Danquah I, Digman A, Multani HK, Kim S, Gaspard P, Aschner M, Lee E. Mechanisms of manganese-induced neurotoxicity and the pursuit of neurotherapeutic strategies. Front Pharmacol 2022; 13:1011947. [PMID: 36605395 PMCID: PMC9808094 DOI: 10.3389/fphar.2022.1011947] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 12/01/2022] [Indexed: 01/07/2023] Open
Abstract
Chronic exposure to elevated levels of manganese via occupational or environmental settings causes a neurological disorder known as manganism, resembling the symptoms of Parkinson's disease, such as motor deficits and cognitive impairment. Numerous studies have been conducted to characterize manganese's neurotoxicity mechanisms in search of effective therapeutics, including natural and synthetic compounds to treat manganese toxicity. Several potential molecular targets of manganese toxicity at the epigenetic and transcriptional levels have been identified recently, which may contribute to develop more precise and effective gene therapies. This review updates findings on manganese-induced neurotoxicity mechanisms on intracellular insults such as oxidative stress, inflammation, excitotoxicity, and mitophagy, as well as transcriptional dysregulations involving Yin Yang 1, RE1-silencing transcription factor, transcription factor EB, and nuclear factor erythroid 2-related factor 2 that could be targets of manganese neurotoxicity therapies. This review also features intracellular proteins such as PTEN-inducible kinase 1, parkin, sirtuins, leucine-rich repeat kinase 2, and α-synuclein, which are associated with manganese-induced dysregulation of autophagy/mitophagy. In addition, newer therapeutic approaches to treat manganese's neurotoxicity including natural and synthetic compounds modulating excitotoxicity, autophagy, and mitophagy, were reviewed. Taken together, in-depth mechanistic knowledge accompanied by advances in gene and drug delivery strategies will make significant progress in the development of reliable therapeutic interventions against manganese-induced neurotoxicity.
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Affiliation(s)
- Edward Pajarillo
- Department of Pharmaceutical Science, College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, FL, United States
| | - Ivan Nyarko-Danquah
- Department of Pharmaceutical Science, College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, FL, United States
| | - Alexis Digman
- Department of Pharmaceutical Science, College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, FL, United States
| | - Harpreet Kaur Multani
- Department of Biology, College of Science and Technology, Florida A&M University, Tallahassee, FL, United States
| | - Sanghoon Kim
- Department of Pharmaceutical Science, College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, FL, United States
| | - Patric Gaspard
- Department of Pharmaceutical Science, College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, FL, United States
| | - Michael Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, New York, NY, United States
| | - Eunsook Lee
- Department of Pharmaceutical Science, College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, FL, United States
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Jangra A, Verma M, Kumar D, Chandrika C, Rachamalla M, Dey A, Dua K, Jha SK, Ojha S, Alexiou A, Kumar D, Jha NK. Targeting Endoplasmic Reticulum Stress using Natural Products in Neurological Disorders. Neurosci Biobehav Rev 2022; 141:104818. [DOI: 10.1016/j.neubiorev.2022.104818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 07/23/2022] [Accepted: 08/03/2022] [Indexed: 10/16/2022]
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Simultaneous Screening and Analysis of Anti-inflammatory and Antiproliferative Compounds from Euphorbia maculata Combining Bio-affinity Ultrafiltration with Multiple Drug Targets. JOURNAL OF ANALYSIS AND TESTING 2022. [DOI: 10.1007/s41664-022-00225-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Mitra S, Chakraborty AJ, Tareq AM, Emran TB, Nainu F, Khusro A, Idris AM, Khandaker MU, Osman H, Alhumaydhi FA, Simal-Gandara J. Impact of heavy metals on the environment and human health: Novel therapeutic insights to counter the toxicity. JOURNAL OF KING SAUD UNIVERSITY - SCIENCE 2022; 34:101865. [DOI: 10.1016/j.jksus.2022.101865] [Citation(s) in RCA: 252] [Impact Index Per Article: 126.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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Shin KO, Kim S, Kim B, Park HY, Jung E, Kim G, Kim D, Cho HE, Uchida Y, Park K. Euphorbia supina Extracts Block NADPH Oxidase-Mediated, Ceramide-Induced Apoptosis Initiated by Diesel Particulate Matter. Pharmaceuticals (Basel) 2022; 15:ph15040431. [PMID: 35455428 PMCID: PMC9026628 DOI: 10.3390/ph15040431] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Revised: 03/29/2022] [Accepted: 03/29/2022] [Indexed: 01/27/2023] Open
Abstract
Air pollutants contribute to the development of diseases such as asthma, chronic obstructive pulmonary disease (COPD), pulmonary cancer, cardiovascular problems, and some skin diseases. We recently found that a major air pollutant, diesel particulate matter (DPM), induces apoptosis in human keratinocytes by increasing a proapoptotic lipid mediator, ceramide. DPM activates nicotinamide adenine dinucleotide phosphate (NADPH) oxidase (NOX), which stimulates sphingomyelinase, leading to an increased conversion of sphingomyelin to ceramide. Interestingly, we characterized that although NOX is a reactive oxygen species (ROS) generator, the activation of sphingomyelinases by NOX is an ROS-independent mechanism. A Korean weed, prostrate spurge Euphorbia supina Rafin (ESR), has been used for centuries as a folk medicine to treat bronchitis, hepatitis, hemorrhage, and skin inflammation. Flavonoids, terpenes and tannins are enriched in ESR, and although ESR has proven antioxidative activity, its biological activities are largely unknown. Here, we investigate whether and how ESR protects keratinocytes against DPM-mediated apoptosis. We found that ESR-extracts (ESR-Ex) protect keratinocytes from DPM-induced apoptosis by inhibiting NOX activation in keratinocytes in response to DPM. We also demonstrated that ESR-Ex suppresses NOX activation via a blockage of the aryl hydrocarbon receptor (AhR) activation-mediated transcription of neutrophil cytosolic factor 1 (NCF1)/p47phox, a subunit of NOX. Our study reveals previously uncharacterized biological activity of ESR-Ex; i.e., its inhibition of Ahr and NOX activation. Thus, because the inhibition of NOX has already been developed to treat NOX-mediated diseases, including various types of cardiovascular diseases and cancers, initiated by air pollutants and because AhR activation contributes to the development of chronic inflammatory diseases, our study provides further advantages for the medical use of ESR.
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Affiliation(s)
- Kyong-Oh Shin
- Department of Food Science & Nutrition, and Convergence Program of Material Science for Medicine and Pharmaceutics, Hallym University, Chuncheon 24252, Korea; (K.-O.S.); (S.K.); (B.K.)
- The Korean Institute of Nutrition, Hallym University, Chuncheon 24252, Korea
- LaSS Lipid Institute (LLI), LaSS Inc., Chuncheon 24252, Korea
| | - Sungeun Kim
- Department of Food Science & Nutrition, and Convergence Program of Material Science for Medicine and Pharmaceutics, Hallym University, Chuncheon 24252, Korea; (K.-O.S.); (S.K.); (B.K.)
- The Korean Institute of Nutrition, Hallym University, Chuncheon 24252, Korea
| | - Bokyung Kim
- Department of Food Science & Nutrition, and Convergence Program of Material Science for Medicine and Pharmaceutics, Hallym University, Chuncheon 24252, Korea; (K.-O.S.); (S.K.); (B.K.)
- The Korean Institute of Nutrition, Hallym University, Chuncheon 24252, Korea
| | - Hye-Yoon Park
- Biological and Genetic Resources Assessment Division, National Institute of Biological Resources, Incheon 22689, Korea; (H.-Y.P.); (E.J.); (G.K.)
| | - Eunhee Jung
- Biological and Genetic Resources Assessment Division, National Institute of Biological Resources, Incheon 22689, Korea; (H.-Y.P.); (E.J.); (G.K.)
| | - Garyun Kim
- Biological and Genetic Resources Assessment Division, National Institute of Biological Resources, Incheon 22689, Korea; (H.-Y.P.); (E.J.); (G.K.)
| | - Donghee Kim
- College of Pharmacy, Chonbuk National University, Jeonju 54896, Korea; (D.K.); (H.E.C.)
| | - Hwang Eui Cho
- College of Pharmacy, Chonbuk National University, Jeonju 54896, Korea; (D.K.); (H.E.C.)
| | - Yoshikazu Uchida
- Department of Food Science & Nutrition, and Convergence Program of Material Science for Medicine and Pharmaceutics, Hallym University, Chuncheon 24252, Korea; (K.-O.S.); (S.K.); (B.K.)
- The Korean Institute of Nutrition, Hallym University, Chuncheon 24252, Korea
- Correspondence: (Y.U.); (K.P.); Tel.: +82-33-248-3146 (Y.U.); +82-33-248-2131 (K.P.)
| | - Kyungho Park
- Department of Food Science & Nutrition, and Convergence Program of Material Science for Medicine and Pharmaceutics, Hallym University, Chuncheon 24252, Korea; (K.-O.S.); (S.K.); (B.K.)
- The Korean Institute of Nutrition, Hallym University, Chuncheon 24252, Korea
- Correspondence: (Y.U.); (K.P.); Tel.: +82-33-248-3146 (Y.U.); +82-33-248-2131 (K.P.)
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Rahman MO, Alqahtani AS, Huda SB, Siddiqui SA, Noman OM, Nasr F, Hassan MA, Islam SN. Streblus asper attenuates alloxan-induced diabetes in rats and demonstrates antioxidant and cytotoxic effects. PHARMACEUTICAL BIOLOGY 2021; 59:1058-1064. [PMID: 34365913 PMCID: PMC8354155 DOI: 10.1080/13880209.2021.1954668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 06/28/2021] [Accepted: 07/07/2021] [Indexed: 06/13/2023]
Abstract
CONTEXT Streblus asper Lour. (Moraceae) is used for the treatment of different ailments, including diabetes, and requires scientific validation. OBJECTIVE The study evaluates antidiabetic effects, antioxidant potential, and cytotoxicity of leaf and bark extracts of S. asper. MATERIALS AND METHODS Antidiabetic effects were assessed by inducing diabetes in Wistar albino rats (n = 5, six groups included 30 rats) by injecting alloxan [0.25 mg/kg body weight (bw)] intraperitoneally, and efficacy of methanol extracts of leaf and bark, and aqueous extract of leaves were evaluated by oral administration of 300 mg/kg bw of extracts for 3 weeks. Glibenclamide (Dibenol™) was used as a control (10 mg/kg bw). Antioxidant properties were examined by DPPH free radical scavenging activity, and cytotoxicity was investigated using a brine shrimp lethality assay. RESULTS Methanol extracts of leaves and bark, and the aqueous extract of leaves of S. asper, caused significant reductions in blood glucose levels in diabetic rats of 36.83, 70.33, and 52.71%, respectively, after 21 days of treatment. IC50 values in DPPH radical scavenging assessment for those extracts were 58.92, 88.54, and 111.36 µg/mL, respectively. LC50 values for brine shrimp lethality for the extracts were 173.80, 32.36, and 3235.9 µg/mL, respectively. DISCUSSION AND CONCLUSIONS The methanol bark extract of S. asper showed significant antidiabetic activity. This study will significantly contribute to establishing the plant as an alternative medicinal resource for rural populations of Bangladesh and provides an opportunity for further research to identify the primary active compound(s) and establish new drug candidates.
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Affiliation(s)
- M. Oliur Rahman
- Department of Botany, University of Dhaka, Dhaka, Bangladesh
| | - Ali S. Alqahtani
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | | | - Shah Alam Siddiqui
- Department of Applied Chemistry and Chemical Engineering, Islamic University, Kushtia, Bangladesh
| | - Omar M. Noman
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Fahd Nasr
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Md. Abul Hassan
- Department of Botany, University of Dhaka, Dhaka, Bangladesh
| | - Sheikh Nazrul Islam
- Institute of Nutrition and Food Science, University of Dhaka, Dhaka, Bangladesh
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Cong L, Lei MY, Liu ZQ, Liu ZF, Ma Z, Liu K, Li J, Deng Y, Liu W, Xu B. Resveratrol attenuates manganese-induced oxidative stress and neuroinflammation through SIRT1 signaling in mice. Food Chem Toxicol 2021; 153:112283. [PMID: 34029668 DOI: 10.1016/j.fct.2021.112283] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 05/12/2021] [Accepted: 05/13/2021] [Indexed: 12/14/2022]
Abstract
Exposure to excess levels of manganese (Mn) leads to neurotoxicity. Increasing evidence demonstrates that oxidative stress and neuroinflammation are important pathological causes of neurotoxicity. Resveratrol (Rsv), a sirtuin-1 (SIRT1) activator, plays an important role in neuroprotection. However, the molecular mechanisms of Rsv alleviating Mn-induced oxidative stress and neuroinflammation are not fully understood. To evaluate whether Rsv treatment relieves the oxidative stress and neuroinflammation in the hippocampus after Mn exposure through SIRT1 signaling, C57BL/6 adult mice were exposed to MnCl2 (200 μmol/kg), Rsv (30 mg/kg), and EX527 (5 mg/kg). Our results showed that administering MnCl2 for 6 weeks caused behavioral impairment and nerve cell injury in hippocampal tissue, which was related to oxidative stress and neuroinflammation. Activating Mn-induced JNK and inhibiting SIRT1 increased the phosphorylated and acetylated levels of NF-κB and STAT3, respectively. However, Rsv reduced the phosphorylated and acetylated levels of NF-κB and STAT3, and attenuated Mn-induced oxidative stress and inflammatory cytokines by activating SIRT1 signaling. Most importantly, EX527, a potent SIRT1 inhibitor, inactivated SIRT1, which prevented Rsv from exerting its beneficial effects. Taken together, our findings revealed that Rsv alleviated Mn-induced oxidative stress and neuroinflammation in adult mice by activating SIRT1.
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Affiliation(s)
- Lin Cong
- Department of Environmental Health, School of Public Health, China Medical University, Address:No.77 Puhe Road, Shenyang North New Area, Shenyang,110122, Liaoning, China
| | - Meng-Yu Lei
- Department of Environmental Health, School of Public Health, China Medical University, Address:No.77 Puhe Road, Shenyang North New Area, Shenyang,110122, Liaoning, China
| | - Zhi-Qi Liu
- Department of Environmental Health, School of Public Health, China Medical University, Address:No.77 Puhe Road, Shenyang North New Area, Shenyang,110122, Liaoning, China
| | - Zhuo-Fan Liu
- Department of Environmental Health, School of Public Health, China Medical University, Address:No.77 Puhe Road, Shenyang North New Area, Shenyang,110122, Liaoning, China
| | - Zhuo Ma
- Department of Environmental Health, School of Public Health, China Medical University, Address:No.77 Puhe Road, Shenyang North New Area, Shenyang,110122, Liaoning, China
| | - Kuan Liu
- Department of Environmental Health, School of Public Health, China Medical University, Address:No.77 Puhe Road, Shenyang North New Area, Shenyang,110122, Liaoning, China
| | - Jing Li
- Department of Environmental Health, School of Public Health, China Medical University, Address:No.77 Puhe Road, Shenyang North New Area, Shenyang,110122, Liaoning, China
| | - Yu Deng
- Department of Environmental Health, School of Public Health, China Medical University, Address:No.77 Puhe Road, Shenyang North New Area, Shenyang,110122, Liaoning, China
| | - Wei Liu
- Department of Environmental Health, School of Public Health, China Medical University, Address:No.77 Puhe Road, Shenyang North New Area, Shenyang,110122, Liaoning, China
| | - Bin Xu
- Department of Environmental Health, School of Public Health, China Medical University, Address:No.77 Puhe Road, Shenyang North New Area, Shenyang,110122, Liaoning, China.
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Tinkov AA, Paoliello MMB, Mazilina AN, Skalny AV, Martins AC, Voskresenskaya ON, Aaseth J, Santamaria A, Notova SV, Tsatsakis A, Lee E, Bowman AB, Aschner M. Molecular Targets of Manganese-Induced Neurotoxicity: A Five-Year Update. Int J Mol Sci 2021; 22:4646. [PMID: 33925013 PMCID: PMC8124173 DOI: 10.3390/ijms22094646] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 04/22/2021] [Accepted: 04/25/2021] [Indexed: 12/16/2022] Open
Abstract
Understanding of the immediate mechanisms of Mn-induced neurotoxicity is rapidly evolving. We seek to provide a summary of recent findings in the field, with an emphasis to clarify existing gaps and future research directions. We provide, here, a brief review of pertinent discoveries related to Mn-induced neurotoxicity research from the last five years. Significant progress was achieved in understanding the role of Mn transporters, such as SLC39A14, SLC39A8, and SLC30A10, in the regulation of systemic and brain manganese handling. Genetic analysis identified multiple metabolic pathways that could be considered as Mn neurotoxicity targets, including oxidative stress, endoplasmic reticulum stress, apoptosis, neuroinflammation, cell signaling pathways, and interference with neurotransmitter metabolism, to name a few. Recent findings have also demonstrated the impact of Mn exposure on transcriptional regulation of these pathways. There is a significant role of autophagy as a protective mechanism against cytotoxic Mn neurotoxicity, yet also a role for Mn to induce autophagic flux itself and autophagic dysfunction under conditions of decreased Mn bioavailability. This ambivalent role may be at the crossroad of mitochondrial dysfunction, endoplasmic reticulum stress, and apoptosis. Yet very recent evidence suggests Mn can have toxic impacts below the no observed adverse effect of Mn-induced mitochondrial dysfunction. The impact of Mn exposure on supramolecular complexes SNARE and NLRP3 inflammasome greatly contributes to Mn-induced synaptic dysfunction and neuroinflammation, respectively. The aforementioned effects might be at least partially mediated by the impact of Mn on α-synuclein accumulation. In addition to Mn-induced synaptic dysfunction, impaired neurotransmission is shown to be mediated by the effects of Mn on neurotransmitter systems and their complex interplay. Although multiple novel mechanisms have been highlighted, additional studies are required to identify the critical targets of Mn-induced neurotoxicity.
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Affiliation(s)
- Alexey A. Tinkov
- Laboratory of Ecobiomonitoring and Quality Control, Yaroslavl State University, 150003 Yaroslavl, Russia;
- Laboratory of Molecular Dietetics, Department of Neurological Diseases and Neurosurgery, Department of Analytical and Forensic Toxicology, IM Sechenov First Moscow State Medical University (Sechenov University), 119435 Moscow, Russia; (O.N.V.); (J.A.); (A.T.)
| | - Monica M. B. Paoliello
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY 10461, USA; (M.M.B.P.); (A.C.M.)
- Graduate Program in Public Health, Center of Health Sciences, State University of Londrina, Londrina, PR 86038-350, Brazil
| | - Aksana N. Mazilina
- Department of Medical Elementology, Peoples’ Friendship University of Russia (RUDN University), 117198 Moscow, Russia;
| | - Anatoly V. Skalny
- World-Class Research Center “Digital Biodesign and Personalized Healthcare”, IM Sechenov First Moscow State Medical University (Sechenov University), 119435 Moscow, Russia;
- Laboratory of Medical Elementology, KG Razumovsky Moscow State University of Technologies and Management, 109004 Moscow, Russia
| | - Airton C. Martins
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY 10461, USA; (M.M.B.P.); (A.C.M.)
| | - Olga N. Voskresenskaya
- Laboratory of Molecular Dietetics, Department of Neurological Diseases and Neurosurgery, Department of Analytical and Forensic Toxicology, IM Sechenov First Moscow State Medical University (Sechenov University), 119435 Moscow, Russia; (O.N.V.); (J.A.); (A.T.)
| | - Jan Aaseth
- Laboratory of Molecular Dietetics, Department of Neurological Diseases and Neurosurgery, Department of Analytical and Forensic Toxicology, IM Sechenov First Moscow State Medical University (Sechenov University), 119435 Moscow, Russia; (O.N.V.); (J.A.); (A.T.)
- Research Department, Innlandet Hospital Trust, P.O. Box 104, 2381 Brumunddal, Norway
| | - Abel Santamaria
- Laboratorio de Aminoácidos Excitadores, Instituto Nacional de Neurología y Neurocirugía, SSA, Mexico City 14269, Mexico;
| | - Svetlana V. Notova
- Institute of Bioelementology, Orenburg State University, 460018 Orenburg, Russia;
- Federal Research Centre of Biological Systems and Agro-technologies of the Russian Academy of Sciences, 460000 Orenburg, Russia
| | - Aristides Tsatsakis
- Laboratory of Molecular Dietetics, Department of Neurological Diseases and Neurosurgery, Department of Analytical and Forensic Toxicology, IM Sechenov First Moscow State Medical University (Sechenov University), 119435 Moscow, Russia; (O.N.V.); (J.A.); (A.T.)
- Laboratory of Toxicology, Medical School, University of Crete, Voutes, 700 13 Heraklion, Greece
| | - Eunsook Lee
- Department of Pharmaceutical Sciences, Florida A&M University, Tallahassee, FL 32307, USA;
| | - Aaron B. Bowman
- School of Health Sciences, Purdue University, West Lafayette, IN 47906, USA;
| | - Michael Aschner
- Laboratory of Molecular Dietetics, Department of Neurological Diseases and Neurosurgery, Department of Analytical and Forensic Toxicology, IM Sechenov First Moscow State Medical University (Sechenov University), 119435 Moscow, Russia; (O.N.V.); (J.A.); (A.T.)
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY 10461, USA; (M.M.B.P.); (A.C.M.)
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Martins AC, Gubert P, Villas Boas GR, Paes MM, Santamaría A, Lee E, Tinkov AA, Bowman AB, Aschner M. Manganese-induced neurodegenerative diseases and possible therapeutic approaches. Expert Rev Neurother 2020; 20:1109-1121. [PMID: 32799578 PMCID: PMC7657997 DOI: 10.1080/14737175.2020.1807330] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 08/05/2020] [Indexed: 12/13/2022]
Abstract
INTRODUCTION Neurodegenerative diseases, such as Alzheimer's disease, Parkinson's disease, Huntington's disease, amyotrophic lateral sclerosis and prion disease represent important public health concerns. Exposure to high levels of heavy metals such as manganese (Mn) may contribute to their development. AREAS COVERED In this critical review, we address the role of Mn in the etiology of neurodegenerative diseases and discuss emerging treatments of Mn overload, such as chelation therapy. In addition, we discuss natural and synthetic compounds under development as prospective therapeutics. Moreover, bioinformatic approaches to identify new potential targets and therapeutic substances to reverse the neurodegenerative diseases are discussed. EXPERT OPINION Here, the authors highlight the importance of better understanding the molecular mechanisms of toxicity associated with neurodegenerative diseases, and the role of Mn in these diseases. Additional emphasis should be directed to the discovery of new agents to treat Mn-induced diseases, since present day chelator therapies have limited bioavailability. Furthermore, the authors encourage the scientific community to develop research using libraries of compounds to screen those compounds that show efficacy in regulating brain Mn levels. In addition, bioinformatics may provide novel insight for pathways and clinical treatments associated with Mn-induced neurodegeneration, leading to a new direction in Mn toxicological research.
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Affiliation(s)
- Airton C. Martins
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, 10461, USA
| | - Priscila Gubert
- Department of Biochemistry, Laboratory of Immunopathology Keizo Asami, LIKA, Federal, University of Pernambuco, Recife, Brazil
- Postgraduate Program in Pure and Applied Chemistry, Federal University of Western of Bahia, Bahia, Brazil
| | - Gustavo R Villas Boas
- Research Group on Development of Pharmaceutical Products (P&DProFar), Center for Biological and Health Sciences, Federal University of Western Bahia, Barreiras, Bahia, Brazil
| | - Marina Meirelles Paes
- Research Group on Development of Pharmaceutical Products (P&DProFar), Center for Biological and Health Sciences, Federal University of Western Bahia, Barreiras, Bahia, Brazil
| | - Abel Santamaría
- Laboratorio de Aminoácidos Excitadores, Instituto Nacional de Neurología y Neurocirugía, Mexico City 14269, Mexico
| | - Eunsook Lee
- Department of Pharmaceutical Sciences, Florida A&M University, Tallahassee, FL 32301, USA
| | - Alexey A. Tinkov
- IM Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
- Yaroslavl State University, Yaroslavl, Russia
- Federal Research Centre of Biological Systems and Agro-Technologies of the Russian Academy of Sciences, Orenburg, Russia
| | - Aaron B Bowman
- School of Health Sciences, Purdue University, West Lafayette, IN 47907-2051, USA
| | - Michael Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, 10461, USA
- IM Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
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Liu C, Yan DY, Wang C, Ma Z, Deng Y, Liu W, Xu B. IRE1 signaling pathway mediates protective autophagic response against manganese-induced neuronal apoptosis in vivo and in vitro. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 712:136480. [PMID: 31931206 DOI: 10.1016/j.scitotenv.2019.136480] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 12/30/2019] [Accepted: 12/31/2019] [Indexed: 06/10/2023]
Abstract
Overexposure to manganese (Mn) can result in neurotoxicity and is associated with manganism, a Parkinson's-like neurological disorder. In addition, Mn can induce endoplasmic reticulum (ER) stress and autophagy. In this study, we used C57BL/6 mice to establish a model of manganism and found that Mn could induce cell injury. Our results also showed that Mn could initiate the unfolded protein response (UPR) signaling and autophagy, via initiation of the UPR signaling occurring earlier than autophagy. We further investigated the intrinsic relationship between the endoplasmic reticulum to nucleus 1(ERN1, also known as inositol requiring enzyme 1, IRE1) signaling pathway and autophagy induction in SH-SY5Y cells exposed to Mn. Our results revealed that autophagy activation was a protective response in Mn-induced toxicity. Additionally, we found that Jun N-terminal kinase (JNK) inhibition downregulated autophagy and interaction of c-Jun with the Beclin1 promoter. In addition, knockdown of IRE1 with the LV-IRE1 shRNA suppressed the expression of IRE1, TRAF2, p-ASK1, and p-JNK in Mn-treated SH-SY5Y cells. Furthermore, the expression of proteins associated with ASK1-TRAF2 complex formation and autophagy activation were reversed by the LV-IRE1 shRNA. These findings suggest that IRE1 was involved in the activation of JNK through the formation of the ASK1-TRAF2 complex, and JNK activation led to the induction of autophagy, which required Beclin1 transcription by c-Jun. In this study, we demonstrated that the IRE1 signaling pathway mediated the activation of JNK signaling via the formation of the ASK1-TRAF2 complex which could initiate autophagy and the protein c-Jun which regulates Beclin1 transcription in Mn-induced neurotoxicity.
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Affiliation(s)
- Chang Liu
- Department of Environmental Health, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, Liaoning, China
| | - Dong-Ying Yan
- Department of Environmental Health, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, Liaoning, China
| | - Can Wang
- Department of Environmental Health, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, Liaoning, China
| | - Zhuo Ma
- Department of Environmental Health, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, Liaoning, China
| | - Yu Deng
- Department of Environmental Health, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, Liaoning, China
| | - Wei Liu
- Department of Environmental Health, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, Liaoning, China.
| | - Bin Xu
- Department of Environmental Health, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, Liaoning, China.
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Selective vulnerability in α-synucleinopathies. Acta Neuropathol 2019; 138:681-704. [PMID: 31006067 PMCID: PMC6800835 DOI: 10.1007/s00401-019-02010-2] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 03/13/2019] [Accepted: 04/05/2019] [Indexed: 12/11/2022]
Abstract
Parkinson's disease, dementia with Lewy bodies, and multiple system atrophy are neurodegenerative disorders resulting in progressive motor/cognitive deficits among other symptoms. They are characterised by stereotypical brain cell loss accompanied by the formation of proteinaceous aggregations of the protein α-synuclein (α-syn), being, therefore, termed α-synucleinopathies. Although the presence of α-syn inclusions is a common hallmark of these disorders, the exact nature of the deposited protein is specific to each disease. Different neuroanatomical regions and cellular populations manifest a differential vulnerability to the appearance of protein deposits, cell dysfunction, and cell death, leading to phenotypic diversity. The present review describes the multiple factors that contribute to the selective vulnerability in α-synucleinopathies. We explore the intrinsic cellular properties in the affected regions, including the physiological and pathophysiological roles of endogenous α-syn, the metabolic and genetic build-up of the cells and their connectivity. These factors converge with the variability of the α-syn conformational strains and their spreading capacity to dictate the phenotypic diversity and regional vulnerability of each disease. Finally, we describe the exogenous and environmental factors that potentially contribute by igniting and modulating the differential pathology in α-synucleinopathies. In conclusion, we think that it is the confluence of this disruption of the cellular metabolic state and α-syn structural equilibrium through the anatomical connectivity which appears to initiate cascades of pathological processes triggered by genetic, environmental, or stochastic events that result in the "death by a thousand cuts" profile of α-synucleinopathies.
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16
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Liu C, Yan DY, Wang C, Ma Z, Deng Y, Liu W, Xu B. Manganese activates autophagy to alleviate endoplasmic reticulum stress-induced apoptosis via PERK pathway. J Cell Mol Med 2019; 24:328-341. [PMID: 31639278 PMCID: PMC6933331 DOI: 10.1111/jcmm.14732] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 09/22/2019] [Accepted: 09/27/2019] [Indexed: 12/17/2022] Open
Abstract
Overexposure to manganese (Mn) is neurotoxic. Our previous research has demonstrated that the interaction of endoplasmic reticulum (ER) stress and autophagy participates in the early stage of Mn‐mediated neurotoxicity in mouse. However, the mechanisms of ER stress signalling pathways in the initiation of autophagy remain confused. In the current study, we first validated that ER stress–mediated cell apoptosis is accompanied by autophagy in SH‐SY5Y cells. Then, we found that inhibiting ER stress with 4‐phenylbutyrate (4‐PBA) decreased ER stress–related protein expression and reduced cell apoptosis, whereas blocking autophagy with 3‐methyladenine (3‐MA) increased cell apoptosis. These data indicate that protective autophagy was activated to alleviate ER stress–mediated apoptosis. Knockdown of the protein kinase RNA‐like ER kinase (PERK) gene inhibited Mn‐induced autophagy and weakened the interaction between ATF4 and the LC3 promoter. Our results reveal a novel molecular mechanism in which ER stress may regulate autophagy via the PERK/eIF2α/ATF4 signalling pathway. Additionally, Mn may activate protective autophagy to alleviate ER stress–mediated apoptosis via the PERK/eIF2α/ATF4 signalling pathway in SH‐SY5Y cells.
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Affiliation(s)
- Chang Liu
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang, China
| | - Dong-Ying Yan
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang, China
| | - Can Wang
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang, China
| | - Zhuo Ma
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang, China
| | - Yu Deng
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang, China
| | - Wei Liu
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang, China
| | - Bin Xu
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang, China
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17
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Liu K, Jing M, Liu C, Yan D, Ma Z, Wang C, Deng Y, Liu W, Xu B. Effect of trehalose on manganese‐induced mitochondrial dysfunction and neuronal cell damage in mice. Basic Clin Pharmacol Toxicol 2019; 125:536-547. [DOI: 10.1111/bcpt.13316] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 08/27/2019] [Indexed: 12/15/2022]
Affiliation(s)
- Kuan Liu
- Department of Environmental Health School of Public Health China Medical University Shenyang China
| | - Meng‐Jiao Jing
- Department of Environmental Health School of Public Health China Medical University Shenyang China
| | - Chang Liu
- Department of Environmental Health School of Public Health China Medical University Shenyang China
| | - Dong‐Ying Yan
- Department of Environmental Health School of Public Health China Medical University Shenyang China
| | - Zhuo Ma
- Department of Environmental Health School of Public Health China Medical University Shenyang China
| | - Can Wang
- Department of Environmental Health School of Public Health China Medical University Shenyang China
| | - Yu Deng
- Department of Environmental Health School of Public Health China Medical University Shenyang China
| | - Wei Liu
- Department of Environmental Health School of Public Health China Medical University Shenyang China
| | - Bin Xu
- Department of Environmental Health School of Public Health China Medical University Shenyang China
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18
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Tseng YT, Tsai YH, Fülöp F, Chang FR, Lo YC. 2-Iodo-4'-Methoxychalcone Attenuates Methylglyoxal-Induced Neurotoxicity by Activation of GLP-1 Receptor and Enhancement of Neurotrophic Signal, Antioxidant Defense and Glyoxalase Pathway. Molecules 2019; 24:E2249. [PMID: 31208152 PMCID: PMC6631972 DOI: 10.3390/molecules24122249] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 06/14/2019] [Accepted: 06/15/2019] [Indexed: 01/06/2023] Open
Abstract
Methylglyoxal (MG) acts as a reactive precursor of advanced glycation end products (AGEs). This compound is often connected with pathologies such as diabetes, neurodegenerative processes and diseases of aging. 2-iodo-4'-methoxychalcone (CHA79), a synthetic halogen-containing chalcone derivative, has been reported its anti-diabetic activity. This study aims to investigate the potential protective capability of CHA79 against MG-mediated neurotoxicity in SH-SY5Y cells. Results indicated CHA79 increased viability of cells and attenuated the rate of apoptosis in MG-exposed SH-SY5Y. CHA79 up-regulated expression of anti-apoptotic protein (Bcl-2) and down-regulated apoptotic proteins (Bax, cytochrome c, caspase-3, caspase-9). Moreover, CHA79 significantly up-regulated expression of neurotrophic factors, including glucagon-like peptide-1 receptor (GLP-1R), brain derived neurotrophic factor (BDNF), p75NTR, p-TrkB, p-Akt, p-GK-3β and p-CREB. CHA79 attenuated MG-induced ROS production and enhanced the antioxidant defense including nuclear factor erythroid 2-related factor 2 (Nrf2), HO-1, SOD and GSH. Furthermore, CHA79 attenuated MG-induced reduction of glyoxalase-1 (GLO-1), a vital enzyme on removing AGE precursors. In conclusion, CHA79 is the first novel synthetic chalcone possessing the GLP-1R and GLO-1 activating properties. CHA 79 also exhibits neuroprotective effects against MG toxicity by enhancing neurotrophic signal, antioxidant defense and anti-apoptosis pathway.
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Affiliation(s)
- Yu-Ting Tseng
- Department of Pharmacology, School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
| | - Yi-Hong Tsai
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
| | - Ferenc Fülöp
- Institute of Pharmaceutical Chemistry, University of Szeged, Eötvös u. 6, H-6720 Szeged, Hungary.
- MTA-SZTE Stereochemistry Research Group, Hungarian Academy of Sciences, Eötvös u. 6, H-6720 Szeged, Hungary.
| | - Fang-Rong Chang
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 11221, Taiwan.
| | - Yi-Ching Lo
- Department of Pharmacology, School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan.
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
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19
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El-Hady WM, Galal AAA. Neurotoxic Outcomes of Subchronic Manganese Chloride Exposure via Contaminated Water in Adult Male Rats and the Potential Benefits of Ebselen. Biol Trace Elem Res 2018. [PMID: 29516356 DOI: 10.1007/s12011-018-1291-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The neurological effects of manganese (Mn) exposure on adults consuming contaminated water remain unclear. Accordingly, the current experiment was planned to explore the neurotoxic consequences of subchronic Mn exposure via contaminated water and to examine whether ebselen (Ebs) improved these outcomes. Rats exposed to oral MnCl2 (50 mg/kg body weight) for 30 successive days exhibited reduced rearing and ambulation. Furthermore, Mn administration increased brain Mn concentrations and induced superoxide dismutase, catalase, and glutathione depletion. Mn administration also increased lipid peroxidation biomarker levels. Additionally, Mn increased interleukin1-β and prostaglandin E2 levels and altered caspase-3 and Bcl-2 expression. Mn intoxication also induced marked gliosis, numerous vacuolations, and disoriented and pyknotic Purkinje cells as well as marked vascular congestion in brain tissue. Meanwhile, intraperitoneal administration of Ebs (15 mg/kg body weight) to Mn-intoxicated rats improved the behavioral performance and oxidative damage as well as inflammatory, apoptotic, and histopathological changes. The above results indicate that Ebs alleviated Mn neurotoxicity via its antioxidant, anti-inflammatory, and anti-apoptotic activities. Therefore, Ebs could represent a promising agent in the prevention of Mn-induced neurotoxicity.
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Affiliation(s)
- Walaa M El-Hady
- Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, 44511, Egypt
| | - Azza A A Galal
- Department of Pharmacology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, 44511, Egypt.
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20
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Affiliation(s)
- Jiao Li
- Department of Hygiene Toxicology, School of Public Health, Zunyi Medical College, Zunyi, P.R. China
- The second people’s Hospital of Qixingguan District, Bijie, Guizhou, P.R. China
| | - Yuyan Cen
- Department of Hygiene Toxicology, School of Public Health, Zunyi Medical College, Zunyi, P.R. China
| | - Yan Li
- Department of Hygiene Toxicology, School of Public Health, Zunyi Medical College, Zunyi, P.R. China
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21
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Protective effect of vinpocetine against neurotoxicity of manganese in adult male rats. Naunyn Schmiedebergs Arch Pharmacol 2018; 391:729-742. [PMID: 29671021 DOI: 10.1007/s00210-018-1498-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 04/05/2018] [Indexed: 01/10/2023]
Abstract
Manganese (Mn) is required for many essential biological processes as well as in the development and functioning of the brain. Extensive accumulation of Mn in the brain may cause central nervous system dysfunction known as manganism, a motor disorder associated with cognitive and neuropsychiatric deficits similar to parkinsonism. Vinpocetine, a synthetic derivative of the alkaloid vincamine, is used to improve the cognitive function in cerebrovascular diseases. It possesses antioxidant and antiinflammatory properties. The present work was designed to explore the potential neuroprotective mechanisms exerted by vinpocetine in the Mn-induced neurotoxicity in rats. Rats were allocated into four groups. First group was given saline. The other three groups were given MnCl2; two of them were treated with either L-dopa, the gold standard antiparkinsonian drug, or vinpocetine. Rats receiving MnCl2 exhibited lengthened catalepsy duration in the grid and bar tests, motor impairment in the open-field test and short-term memory deficit in the Y-maze test. Additionally, histological examination revealed structural alterations and degeneration in different brain regions. Besides, striatal monoamines and mitochondrial complex I contents were declined, apoptotic biomarker caspase-3 expression and acetylcholinesterase activity were elevated. Moreover, oxidative stress and inflammation were detected in the striata. L-dopa or vinpocetine exerted protective effects against MnCl2-induced neurotoxicity. It could be hypothesized that modulation of monoamines, upregulation of mitochondrial complex I, antioxidant, antiinflammatory, and antiapoptotic activities are significant mechanisms underlying the neuroprotective effect of vinpocetine in the Mn-induced neurotoxicity model in rats.
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22
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Ma J, Song D, Zhang Y, Chen L, Zhang S, Jia J, Chen T, Guo C, Tian L, Gao A, Niu P. SIRT1 exhibits antioxidative effects in HT22 cells induced by tert-butyl alcohol. ENVIRONMENTAL TOXICOLOGY 2018; 33:142-148. [PMID: 29134718 DOI: 10.1002/tox.22499] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 09/26/2017] [Accepted: 10/06/2017] [Indexed: 06/07/2023]
Abstract
Tertiary butyl alcohol (TBA) is a principal metabolite of methyl tertiary-butyl ether (MTBE), a common pollutant worldwide in the ground or underground water, which is found to produce nervous system damage. Nevertheless, few data regarding the effects of TBA has been reported. Studies indicated that oxidative stress plays a pivotal role in MTBE neurotoxic mechanism. Sirtuin 1 (SIRT1) has been reported to exert a neuroprotective effect on various neurologic diseases via resistance to oxidative stress by deacetylating its substrates. In this study, we examined levels of oxidative stress after exposure to TBA for 6 h in HT22 cells and HT22 cells with SIRT1 silencing (transfected with SIRT1 siRNA) or high expression (preconditioned with agonists SRT1720). We found that TBA activated oxidative stress by increasing generation of intracellular reactive oxygen species (ROS), malondialdehyde (MDA) and Oxidized glutathione (GSSG), and decreasing contents of superoxide dismutase (SOD) and glutathione reductase (GSH). In additional, levels of TBA-induced oxidative stress were aggravated when SIRT1 silenced but alleviated when SIRT1 enhanced. Our study indicated that SIRT1 mitigated oxidative stress induced by TBA.
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Affiliation(s)
- Junxiang Ma
- School of Public Health, Capital Medical University, Xitoutiao Road 10, You'anmenwai Street, Beijing, 100069, China
- Beijing Key Laboratory of Environmental Toxicology, School of Public Health, Capital Medical University, Xitoutiao Road 10, You'anmenwai Street, Beijing, 100069, China
| | - Dongmei Song
- School of Public Health, Capital Medical University, Xitoutiao Road 10, You'anmenwai Street, Beijing, 100069, China
- Beijing Key Laboratory of Environmental Toxicology, School of Public Health, Capital Medical University, Xitoutiao Road 10, You'anmenwai Street, Beijing, 100069, China
| | - Yuanyuan Zhang
- School of Public Health, Capital Medical University, Xitoutiao Road 10, You'anmenwai Street, Beijing, 100069, China
- Beijing Key Laboratory of Environmental Toxicology, School of Public Health, Capital Medical University, Xitoutiao Road 10, You'anmenwai Street, Beijing, 100069, China
| | - Li Chen
- School of Public Health, Capital Medical University, Xitoutiao Road 10, You'anmenwai Street, Beijing, 100069, China
- Beijing Key Laboratory of Environmental Toxicology, School of Public Health, Capital Medical University, Xitoutiao Road 10, You'anmenwai Street, Beijing, 100069, China
| | - Shixuan Zhang
- School of Public Health, Capital Medical University, Xitoutiao Road 10, You'anmenwai Street, Beijing, 100069, China
- Beijing Key Laboratory of Environmental Toxicology, School of Public Health, Capital Medical University, Xitoutiao Road 10, You'anmenwai Street, Beijing, 100069, China
| | - Jiaxin Jia
- School of Public Health, Capital Medical University, Xitoutiao Road 10, You'anmenwai Street, Beijing, 100069, China
- Beijing Key Laboratory of Environmental Toxicology, School of Public Health, Capital Medical University, Xitoutiao Road 10, You'anmenwai Street, Beijing, 100069, China
| | - Tian Chen
- School of Public Health, Capital Medical University, Xitoutiao Road 10, You'anmenwai Street, Beijing, 100069, China
- Beijing Key Laboratory of Environmental Toxicology, School of Public Health, Capital Medical University, Xitoutiao Road 10, You'anmenwai Street, Beijing, 100069, China
| | - Caixia Guo
- School of Public Health, Capital Medical University, Xitoutiao Road 10, You'anmenwai Street, Beijing, 100069, China
- Beijing Key Laboratory of Environmental Toxicology, School of Public Health, Capital Medical University, Xitoutiao Road 10, You'anmenwai Street, Beijing, 100069, China
| | - Lin Tian
- School of Public Health, Capital Medical University, Xitoutiao Road 10, You'anmenwai Street, Beijing, 100069, China
- Beijing Key Laboratory of Environmental Toxicology, School of Public Health, Capital Medical University, Xitoutiao Road 10, You'anmenwai Street, Beijing, 100069, China
| | - Ai Gao
- School of Public Health, Capital Medical University, Xitoutiao Road 10, You'anmenwai Street, Beijing, 100069, China
- Beijing Key Laboratory of Environmental Toxicology, School of Public Health, Capital Medical University, Xitoutiao Road 10, You'anmenwai Street, Beijing, 100069, China
| | - Piye Niu
- School of Public Health, Capital Medical University, Xitoutiao Road 10, You'anmenwai Street, Beijing, 100069, China
- Beijing Key Laboratory of Environmental Toxicology, School of Public Health, Capital Medical University, Xitoutiao Road 10, You'anmenwai Street, Beijing, 100069, China
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Bahar E, Kim JY, Yoon H. Quercetin Attenuates Manganese-Induced Neuroinflammation by Alleviating Oxidative Stress through Regulation of Apoptosis, iNOS/NF-κB and HO-1/Nrf2 Pathways. Int J Mol Sci 2017; 18:ijms18091989. [PMID: 28914791 PMCID: PMC5618638 DOI: 10.3390/ijms18091989] [Citation(s) in RCA: 99] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 08/29/2017] [Accepted: 09/13/2017] [Indexed: 12/16/2022] Open
Abstract
Manganese (Mn) is an essential trace element required for the development of human body and acts as an enzyme co-factor or activator for various reactions of metabolism. While essential in trace amounts, excessive Mn exposure can result in toxic accumulations in human brain tissue and resulting extrapyramidal symptoms called manganism similar to idiopathic Parkinson’s disease (PD). Quercetin (QCT) has been demonstrated to play an important role in altering the progression of neurodegenerative diseases by protecting against oxidative stress. This study aimed to investigate the protective effect of QCT on Mn-induced neurotoxicity and the underlying mechanism in SK-N-MC human neuroblastoma cell line and Sprague-Dawley (SD) male rat brain. The results showed that Mn treatment significantly decreased the cell viability of SK-N-MC cell and increased the release of lactate dehydrogenase (LDH), which was attenuated by QCT pretreatment at 10 and 20 µg/mL. Compared to the Mn alone group, QCT pretreatment significantly attenuated Mn-induced oxidative stress, mitochondrial dysfunction and apoptosis. Meanwhile, QCT pretreatment markedly downregulated the NF-κB but upregulated the heme oxygenase-1 (HO-1) and Nrf2 proteins, compared to the Mn alone group. Our result showed the beneficial effect of QCT on hematological parameters against Mn in rat brain. QCT decrease reactive oxygen species (ROS) and protein carbonyl levels and increased Cu/Zn-superoxide dismutase (SOD) activity induced in Mn-treated rats. QCT administration caused a significant reduction in the Mn-induced neuroinflammation by inhibiting the expression of inflammatory markers such as tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), interleukin-6 (IL-6) cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS). QCT lowered the Mn elevated levels of various downstream apoptotic markers, including Bax, cytochrome c, cleaved caspase-3 and polymerase-1 (PARP-1), while QCT treatment upregulated anti-apoptotic Bcl-2 proteins and prevented Mn-induced neurodegeneration. Furthermore, administration of QCT (25 and 50 mg/kg) to Mn-exposed rats showed improvement of histopathological alteration in comparison to Mn-treated rats. Moreover, administration of QCT to Mn-exposed rats showed significant reduction of 8-hydroxy-2′-deoxyguanosine (8-OHdG), Bax, activated caspase-3 and PARP-1 immunoreactivity. These results indicate that QCT could effectively inhibit Mn induced apoptosis and inflammatory response in SK-N-MC cells and SD rats, which may involve the activation of HO-1/Nrf2 and inhibition of NF-κB pathway.
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Affiliation(s)
- Entaz Bahar
- College of Pharmacy, Research Institute of Pharmaceutical Sciences, Gyeongsang National University, Jinju 52828, Gyeongnam, Korea.
| | - Ji-Ye Kim
- Department of Pathology, College of Medicine, Yonsei University, Seoul 03722, Korea.
- Department of Pathology and Translational Genomics, School of Medicine, Samsung Medical Center, Seoul 06351, Korea.
| | - Hyonok Yoon
- College of Pharmacy, Research Institute of Pharmaceutical Sciences, Gyeongsang National University, Jinju 52828, Gyeongnam, Korea.
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Bahar E, Lee GH, Bhattarai KR, Lee HY, Kim HK, Handigund M, Choi MK, Han SY, Chae HJ, Yoon H. Protective role of quercetin against manganese-induced injury in the liver, kidney, and lung; and hematological parameters in acute and subchronic rat models. DRUG DESIGN DEVELOPMENT AND THERAPY 2017; 11:2605-2619. [PMID: 28919711 PMCID: PMC5592961 DOI: 10.2147/dddt.s143875] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Manganese (Mn) is an important mineral element required in trace amounts for development of the human body, while over- or chronic-exposure can cause serious organ toxicity. The current study was designed to evaluate the protective role of quercetin (Qct) against Mn-induced toxicity in the liver, kidney, lung, and hematological parameters in acute and subchronic rat models. Male Sprague Dawley rats were divided into control, Mn (100 mg/kg for acute model and 15 mg/kg for subchronic model), and Mn + Qct (25 and 50 mg/kg) groups in both acute and subchronic models. Our result revealed that Mn + Qct groups effectively reduced Mn-induced ALT, AST, and creatinine levels. However, Mn + Qct groups had effectively reversed Mn-induced alteration of complete blood count, including red blood cells, hemoglobin, hematocrit, mean corpuscular volume, mean corpuscular hemoglobin, mean corpuscular hemoglobin concentration, platelets, and white blood cells. Meanwhile, the Mn + Qct groups had significantly decreased neutrophil and eosinophil and increased lymphocyte levels relative to the Mn group. Additionally, Mn + Qct groups showed a beneficial effect against Mn-induced macrophages and neutrophils. Our result demonstrated that Mn + Qct groups exhibited protective effects on Mn-induced alteration of GRP78, CHOP, and caspase-3 activities. Furthermore, histopathological observation showed that Mn + Qct groups effectively counteracted Mn-induced morphological change in the liver, kidney, and lung. Moreover, immunohistochemically Mn + Qct groups had significantly attenuated Mn-induced 8-oxo-2′-deoxyguanosine immunoreactivity. Our study suggests that Qct could be a substantially promising organ-protective agent against toxic Mn effects and perhaps against other toxic metal chemicals or drugs.
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Affiliation(s)
- Entaz Bahar
- College of Pharmacy, Research Institute of Pharmaceutical Sciences, Gyeongsang National University, Jinju
| | - Geum-Hwa Lee
- Department of Pharmacology, Medical School, Chonbuk National University
| | | | - Hwa-Young Lee
- Department of Pharmacology, Medical School, Chonbuk National University
| | - Hyun-Kyoung Kim
- Department of Pharmacology, Medical School, Chonbuk National University
| | - Mallikarjun Handigund
- Department of Laboratory Medicine, Chonbuk National University Hospital, Jeonju, Republic of Korea
| | - Min-Kyung Choi
- Department of Pharmacology, Medical School, Chonbuk National University
| | - Sun-Young Han
- College of Pharmacy, Research Institute of Pharmaceutical Sciences, Gyeongsang National University, Jinju
| | - Han-Jung Chae
- Department of Pharmacology, Medical School, Chonbuk National University
| | - Hyonok Yoon
- College of Pharmacy, Research Institute of Pharmaceutical Sciences, Gyeongsang National University, Jinju
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Marreilha dos Santos AP, Andrade V, Aschner M. Neuroprotective and Therapeutic Strategies for Manganese-Induced Neurotoxicity. CLINICAL PHARMACOLOGY AND TRANSLATIONAL MEDICINE 2017; 1:54-62. [PMID: 30854510 PMCID: PMC6402347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Manganese (Mn) is an essential element required for growth, development and general maintenance of health. However, chronic or high occupational and environmental exposure to excessive levels of Mn has long been known to lead to a progressive neurological disorder similar to Parkinsonism. Manganism patients display a variety of symptoms, including mental, cognitive and behavioural impediments, as well as motor dysfunctions that are associated with basal ganglia dysfunction. Taking into account the pharmacokinetics and Mn-related toxicity mechanisms, several neuroprotective compounds and therapeutic approaches have been investigated to assess their efficacy in mitigating its neurotoxicity. Here, we will briefly address some of the toxic mechanisms of Mn, followed by neuroprotective strategies and therapeutic approaches aiming to reduce or treat Mn induced neurotoxicity. Natural and synthetic antioxidants, anti-inflammatory compounds, ATP/ADP ratio protectors and glutamate protectors have been introduced in view of decreasing Mn-induced neurotoxicity. In addition, the efficacy and mechanisms of several therapeutic interventions such as levodopa, ethylene-diamine-tetraacetic acid (EDTA) and para-aminosalicylic acid (PAS), aimed at ameliorating Mn neurotoxic symptoms in humans, will be reviewed.
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Affiliation(s)
- AP Marreilha dos Santos
- Institute of Medicine Research (iMed.ULisboa), Faculty of Pharmacy, University of Lisbon, Lisbon. Portugal
| | - V Andrade
- Institute of Medicine Research (iMed.ULisboa), Faculty of Pharmacy, University of Lisbon, Lisbon. Portugal
| | - M Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, USA
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Yiu AJ, Ibeh CL, Roy SK, Bandyopadhyay BC. Melamine induces Ca 2+-sensing receptor activation and elicits apoptosis in proximal tubular cells. Am J Physiol Cell Physiol 2017; 313:C27-C41. [PMID: 28381520 DOI: 10.1152/ajpcell.00225.2016] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 03/29/2017] [Accepted: 03/30/2017] [Indexed: 01/06/2023]
Abstract
Melamine causes renal tubular cell injury through inflammation, fibrosis, and apoptosis. Although melamine affects the rise in intracellular Ca2+ concentration ([Ca2+]i), reactive oxygen species (ROS) production, and proapoptotic pathway activation, the mechanism of upstream Ca2+ signaling is unknown. Because melamine has some structural similarities with l-amino acids, which endogenously activate Ca2+-sensing receptors (CSR), we examined the effect of melamine on CSR-induced Ca2+ signaling and apoptotic cell death. We show here that melamine activates CSR, causing a sustained Ca2+ entry in the renal epithelial cell line, LLC-PK1. Moreover, such CSR stimulation resulted in a rise in [Ca2+]i, leading to enhanced ROS production. Furthermore, melamine-induced elevated [Ca2+]i and ROS production caused a dose-dependent increase in apoptotic (by DAPI staining, DNA laddering, and annexin V assay) and necrotic (propidium iodide staining) cell death. Upon examining the downstream mechanism, we found that transforming growth factor β1 (TGF-β1), which increases extracellular matrix genes and proapoptotic signaling, was also upregulated at lower doses of melamine, which could be due to an early event inducing apoptosis. Additionally, cells exposed to melamine displayed a rise in pERK activation and lactate dehydrogenase release resulting in cytotoxicity. These results offer a novel insight into the molecular mechanisms by which melamine exerts its effect on CSR, causing a sustained elevation of [Ca2+]i, leading to ROS generation, fibronectin production, proapoptotic pathway activation, and renal cell damage. Together, these results thus suggest that melamine-induced apoptosis and/or necrosis may subsequently result in acute kidney injury and promote kidney stone formation.
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Affiliation(s)
- Allen J Yiu
- Calcium Signaling Laboratory, Research Service, Veterans Affairs Medical Center, Washington, District of Columbia.,Department of Pharmacology and Physiology, School of Medicine, George Washington University, Washington, District of Columbia; and
| | - Cliff-Lawrence Ibeh
- Calcium Signaling Laboratory, Research Service, Veterans Affairs Medical Center, Washington, District of Columbia
| | - Sanjit K Roy
- Calcium Signaling Laboratory, Research Service, Veterans Affairs Medical Center, Washington, District of Columbia
| | - Bidhan C Bandyopadhyay
- Calcium Signaling Laboratory, Research Service, Veterans Affairs Medical Center, Washington, District of Columbia; .,Department of Pharmacology and Physiology, School of Medicine, George Washington University, Washington, District of Columbia; and.,Department of Pharmacology and Physiology, Georgetown University, Washington, District of Columbia
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Bahar E, Akter KM, Lee GH, Lee HY, Rashid HO, Choi MK, Bhattarai KR, Hossain MMM, Ara J, Mazumder K, Raihan O, Chae HJ, Yoon H. β-Cell protection and antidiabetic activities of Crassocephalum crepidioides (Asteraceae) Benth. S. Moore extract against alloxan-induced oxidative stress via regulation of apoptosis and reactive oxygen species (ROS). Altern Ther Health Med 2017; 17:179. [PMID: 28356096 PMCID: PMC5372275 DOI: 10.1186/s12906-017-1697-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 03/17/2017] [Indexed: 12/21/2022]
Abstract
Background Medicinal plants are becoming more popular in the treatment of various diseases because of the adverse effects of the current therapy, especially antioxidant plant components such as phenols and flavonoids have a protective role against oxidative stress-induced degenerative diseases like diabetes. Thus, the purpose of this study was to investigate β-cell protection and antidiabetic activities of Crassocephalum crepidioides (Asteraceae) Benth. S. Moore. Method The in-vitro study was conducted by the pancreatic β-cell culture and α-amylase inhibition technique which includes two methods, namely starch-iodine method and 3,5-dinitrosalicylic acid (DNSA) method. On the other hand, the in-vivo study was performed by oral glucose tolerance test (OGTT) method and alloxan-induced diabetes method by using Wistar albino rat. At the end pancreatic specimens were removed and processed for histopathological study. Result The plant extract showed significant (*p < 0.05, **p < 0.01) effect on hyperglycemia as compared to standard (Gliclazide) in OGTT. The plant extract showed efficient protection activity of pancreatic β-cell from cell death in INS-1 cell line by significantly reduced (*p < 0.05, **p < 0.01) the levels alloxan-induced apoptosis and intracellular reactive oxygen species (ROS) accumulation. In addition, the plant extract showed a significant (*p < 0.05, **p < 0.01) effect on hyperglycemia by increases in percent of β-cells present in each islet (45% – 60%) compared to the diabetic group. Conclusion The result showed that C. crepidioides had β-cell protection and antidiabetic activities in pancreatic β-cell culture and Wistar albino rat. Electronic supplementary material The online version of this article (doi:10.1186/s12906-017-1697-0) contains supplementary material, which is available to authorized users.
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