1
|
Song C, Chu Z, Dai J, Xie D, Qin T, Xie L, Zhai Z, Huang S, Xu Y, Sun T. Water extract of moschus alleviates erastin-induced ferroptosis by regulating the Keap1/Nrf2 pathway in HT22 cells. J Ethnopharmacol 2024; 326:117937. [PMID: 38423409 DOI: 10.1016/j.jep.2024.117937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 02/16/2024] [Accepted: 02/17/2024] [Indexed: 03/02/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Moschus, first described in the Shennong's Classic of the Materia medicine, is a scarce and precious animal medicine. Modern pharmacological researches have suggested that Moschus has neuroprotective actions, and its mechanism is related to anti-inflammatory, antioxidant, and anti-apoptosis effects. Ferroptosis is one of the major pathologies of Alzheimer's disease (AD) and is widely implicated in the pathogenesis and progression of AD. Although previous studies have suggested that Moschus possesses neuroprotective effect, whether Moschus could mitigate neuronal damages by inhibiting the onset of ferroptosis is unknown in model cells of AD. AIM OF THE STUDY The aim of study was to explore the water extract of Moschus (WEM) on ferroptosis caused by erastin and the potential mechanism. MATERIALS AND METHODS Erastin was used to stimulate HT22 cells to form ferroptosis model to evaluate the anti-ferroptosis effect of WEM by cell counting kit-8 and lactic dehydrogenase (LDH) tests. The malondialdehyde (MDA) and glutathione (GSH) kits are used for detection of MDA and GSH levels, and 2',7'-dichlorofluorescein diacetate and C11 BODIPY 581/591 fluorescence probe are used for evaluation of reactive oxygen species (ROS) and lipid peroxide (LOOH) levels. And Western blot was used to test nuclear factor erythroid 2-related factor 2 (Nrf2), Kelch-like ECH-associated protein 1 (Keap1), heme oxygenase-1 (HO-1), and ferroptosis associated proteins including glutathione peroxidase 4 (GPX4), cystine/glutamate antiporter subunit (SLC7A11), ferritin heavy chain 1 (FTH1), ferroportin1 (FPN1), transferrin receptor (TFRC). In addition, the Nrf2 inhibitor ML385 was applied to verify whether WEM prevents erastin-induced ferroptosis by activating the Keap1/Nrf2 pathway. RESULTS After WEM treatment, erastin-induced HT22 cell survival was significantly elevated, the accumulation of intracellular MDA, ROS, and LOOH were significantly reduced, the level of GSH and expressions of ferroptosis inhibitors GPX4 and SLC7A11 were significantly increased, and iron metabolism-related proteins TFRC, FPN1, and FTH1 were regulated. These effects of WEM are implemented by activating the Keap1/Nrf2 pathway. CONCLUSIONS This study demonstrated that WEM could perform neuroprotective effects by alleviating ferroptosis, verified that WEM treatment of AD can be mediated by the Keap1/Nrf2 pathway, and provided theoretical support for the application of WEM in the treatment of AD.
Collapse
Affiliation(s)
- Caiyou Song
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Zhili Chu
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Jingyi Dai
- School of Intelligent Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Danni Xie
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Tao Qin
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Linjiang Xie
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Zhenwei Zhai
- The Acupuncture and Tuina School, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Sha Huang
- School of Intelligent Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Ying Xu
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, 610072, China.
| | - Tao Sun
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China; School of Intelligent Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China.
| |
Collapse
|
2
|
Tonolo F, Coletta S, Fiorese F, Grinzato A, Albanesi M, Folda A, Ferro S, De Mario A, Piazza I, Mammucari C, Arrigoni G, Marin O, Cestonaro G, Nataloni L, Costanzo E, Lodovichi C, Rigobello MP, de Bernard M. Sunflower seed-derived bioactive peptides show antioxidant and anti-inflammatory activity: From in silico simulation to the animal model. Food Chem 2024; 439:138124. [PMID: 38064839 DOI: 10.1016/j.foodchem.2023.138124] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 11/09/2023] [Accepted: 11/29/2023] [Indexed: 01/10/2024]
Abstract
The evolving field of food technology is increasingly dedicated to developing functional foods. This study explored bioactive peptides from sunflower protein isolate (SPI), obtained from defatted flour, a by-product of the oil processing industry. SPI underwent simulated gastrointestinal digestion and the obtained peptide-enriched fraction (PEF) showed antioxidant properties in vivo, in zebrafish. Among the peptides present in PEF identified by mass spectrometry analysis, we selected those with antioxidant properties by in silico evaluation, considering their capability to interact with Keap1, key protein in the regulation of antioxidant response. The selected peptides were synthesized and evaluated in a cellular model. As a result, DVAMPVPK, VETGVIKPG, TTHTNPPPEAE, LTHPQHQQQGPSTG and PADVTPEEKPEV activated Keap1/Nrf2 pathway leading to Antioxidant Response Element-regulated enzymes upregulation. Since the crosstalk between Nrf2 and NF-κB is well known, the potential anti-inflammatory activity of the peptides was assessed and principally PADVTPEEKPEV showed good features both as antioxidant and anti-inflammatory molecule.
Collapse
Affiliation(s)
- Federica Tonolo
- Department of Biomedical Sciences, Via Ugo Bassi 58/B, 35131 Padova, Italy; Department of Compared Biomedicine and Food Science, Viale dell'Università 16, 35020 Legnaro, PD, Italy
| | - Sara Coletta
- Department of Biology, Via Ugo Bassi 58/B, 35131 Padova, Italy
| | - Federico Fiorese
- Department of Biomedical Sciences, Via Ugo Bassi 58/B, 35131 Padova, Italy
| | - Alessandro Grinzato
- ESRF: European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - Marica Albanesi
- Veneto Institute of Molecular Medicine (VIMM), Padova, Italy; Padova Neuroscience Center, Università degli Studi di Padova, Padova, Italy
| | - Alessandra Folda
- Department of Biomedical Sciences, Via Ugo Bassi 58/B, 35131 Padova, Italy
| | - Stefania Ferro
- Department of Biomedical Sciences, Via Ugo Bassi 58/B, 35131 Padova, Italy
| | - Agnese De Mario
- Department of Biomedical Sciences, Via Ugo Bassi 58/B, 35131 Padova, Italy
| | - Ilaria Piazza
- Department of Biomedical Sciences, Via Ugo Bassi 58/B, 35131 Padova, Italy
| | - Cristina Mammucari
- Department of Biomedical Sciences, Via Ugo Bassi 58/B, 35131 Padova, Italy
| | - Giorgio Arrigoni
- Department of Biomedical Sciences, Via Ugo Bassi 58/B, 35131 Padova, Italy
| | - Oriano Marin
- Department of Biomedical Sciences, Via Ugo Bassi 58/B, 35131 Padova, Italy
| | - Giulia Cestonaro
- Cereal Docks S.p.A. - Research & Innovation Department, Via Innovazione 1, 36043 Camisano Vicentino, VI, Italy
| | - Luigi Nataloni
- Cereal Docks S.p.A, Via Innovazione 1, Camisano Vicentino, VI 36043, Italy
| | - Enrico Costanzo
- Cereal Docks S.p.A. - Research & Innovation Department, Via Innovazione 1, 36043 Camisano Vicentino, VI, Italy
| | - Claudia Lodovichi
- Veneto Institute of Molecular Medicine (VIMM), Padova, Italy; Padova Neuroscience Center, Università degli Studi di Padova, Padova, Italy; Institute of Neuroscience, Consiglio Nazionale delle Ricerche (CNR), Padova, Italy
| | | | | |
Collapse
|
3
|
Chen C, Zhu S, Fu T, Chen Y, Bai L, Chen D. Targeting Mitochondrial Oxidative Stress to Protect Against Preterm Birth and Fetal Brain Injury via Nrf2 Induction. Antioxid Redox Signal 2024. [PMID: 38573008 DOI: 10.1089/ars.2023.0382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
Aims: Preterm birth (PTB), recognized as delivery before 37 weeks of gestation, is a multifactorial syndrome characterizing as the main cause of neonatal mortality. Reactive oxygen species (ROS) have been identified as proinflammatory factors to cause placental inflammation, thereby resulting in several pregnancy outcomes. To date, limited knowledge regarding the underlying mechanisms of ROS-induced PTB has been reported. In this study, we aimed to investigate the role of oxidative stress in PTB and the protective effects of mitochondria-targeted antioxidant MitoTEMPO (MT) on preterm labor and offspring mice. Results: In this study, we found that preterm placentas had abnormal mitochondrial function, oxidative stress, and inflammatory response. In the lipopolysaccharide (LPS)-induced PTB mouse model, MT inhibited PTB by ameliorating maternal oxidative stress and inflammation, especially in placentas, thus improving placental function to maintain pregnancy. Antenatal administration of MT prevented LPS-induced fetal brain damage in acute phase and improved long-term neurodevelopmental impairments. Furthermore, our in vitro investigations validated that MT retarded the ROS accumulation and inflammatory response in LPS-stimulated trophoblast cells by promoting Kelch-like ECH-associated protein 1 (Keap1) degradation and subsequently activating nuclear factor erythroid 2-related factor 2 (Nrf2). By inhibiting Nrf2 activation, we discovered that the anti-inflammation and protective characteristics of MT were Nrf2/ARE pathway dependent. Innovation and Conclusion: MT inhibited PTB and fetal brain injury by inhibiting maternal inflammation and improving placental function through Keap1/Nrf2/antioxidant response element signaling pathway. Our findings provide a novel therapeutic strategy for PTB.
Collapse
Affiliation(s)
- Chaolu Chen
- Department of Obstetrics and Gynecology, Women's Hospital, School of Medicine, Zhejiang University, Zhejiang, China
| | - Shuaiying Zhu
- Department of Obstetrics and Gynecology, Women's Hospital, School of Medicine, Zhejiang University, Zhejiang, China
| | - Tiantian Fu
- Department of Obstetrics and Gynecology, Women's Hospital, School of Medicine, Zhejiang University, Zhejiang, China
| | - Yanmin Chen
- Department of Obstetrics and Gynecology, Women's Hospital, School of Medicine, Zhejiang University, Zhejiang, China
| | - Long Bai
- Department of Reproductive Endocrinology, Women's Hospital, School of Medicine, Zhejiang University, Zhejiang, China
| | - Danqing Chen
- Department of Obstetrics and Gynecology, Women's Hospital, School of Medicine, Zhejiang University, Zhejiang, China
| |
Collapse
|
4
|
Wu J, Luo D, Tou L, Xu H, Jiang C, Wu D, Que H, Zheng J. NEK2 affects the ferroptosis sensitivity of gastric cancer cells by regulating the expression of HMOX1 through Keap1/Nrf2. Mol Cell Biochem 2024:10.1007/s11010-024-04960-y. [PMID: 38503948 DOI: 10.1007/s11010-024-04960-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 02/05/2024] [Indexed: 03/21/2024]
Abstract
NEK2 is a serine/threonine protein kinase that is involved in regulating the progression of various tumors. Our previous studies have found that NEK2 is highly expressed in gastric cancer and suggests that patients have a worse prognosis. However, its role and mechanism in gastric cancer are only poorly studied. In this study, we established a model of ferroptosis induced by RSL3 or Erastin in AGS cells in vitro, and konckdown NEK2, HOMX1, Nrf2 by siRNA. The assay kit was used to analyzed cell viability, MDA levels, GSH and GSSG content, and FeRhoNox™-1 fluorescent probe, BODIPY™ 581/591 C11 lipid oxidation probe, CM-H2DCFDA fluorescent probe were used to detected intracellular Fe2+, lipid peroxidation, and ROS levels, respectively. Calcein-AM/PI staining was used to detect the ratio of live and dead cells, qRT-PCR and Western blot were used to identify the mRNA and protein levels of genes in cells, immunofluorescence staining was used to analyze the localization of Nrf2 in cells, RNA-seq was used to analyze changes in mRNA expression profile, and combined with the FerrDb database, ferroptosis-related molecules were screened to elucidate the impact of NEK2 on the sensitivity of gastric cancer cells to ferroptosis. We found that inhibition of NEK2 could enhance the sensitivity of gastric cancer cells to RSL3 and Erastin-induced ferroptosis, which was reflected in the combination of inhibition of NEK2 and ferroptosis induction compared with ferroptosis induction alone: cell viability and GSH level were further decreased, while the proportion of dead cells, Fe2+ level, ROS level, lipid oxidation level, MDA level, GSSG level and GSSG/GSH ratio were further increased. Mechanism studies have found that inhibiting NEK2 could promote the expression of HMOX1, a gene related to ferroptosis, and enhance the sensitivity of gastric cancer cells to ferroptosis by increasing HMOX1. Further mechanism studies have found that inhibiting NEK2 could promote the ubiquitination and proteasome degradation of Keap1, increase the level of Nrf2 in the nucleus, and thus promote the expression of HMOX1. This study confirmed that NEK2 can regulate HMOX1 expression through Keap1/Nrf2 signal, and then affect the sensitivity of gastric cancer cells to ferroptosis, enriching the role and mechanism of NEK2 in gastric cancer.
Collapse
Affiliation(s)
- Jianyong Wu
- Gastroenterology Department, Lishui Municipal Central Hospital, The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui, Zhejiang, China
| | - Desheng Luo
- Gastrointestinal Surgery, Lishui Municipal Central Hospital, The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui, Zhejiang, China
| | - Laizhen Tou
- Gastrointestinal Surgery, Lishui Municipal Central Hospital, The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui, Zhejiang, China
| | - Hongtao Xu
- Gastrointestinal Surgery, Lishui Municipal Central Hospital, The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui, Zhejiang, China
| | - Chuan Jiang
- Gastrointestinal Surgery, Lishui Municipal Central Hospital, The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui, Zhejiang, China
| | - Dan Wu
- Gastrointestinal Surgery, Lishui Municipal Central Hospital, The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui, Zhejiang, China
| | - Haifeng Que
- Gastrointestinal Surgery, Lishui Municipal Central Hospital, The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui, Zhejiang, China
| | - Jingjing Zheng
- Gastrointestinal Surgery, Lishui Municipal Central Hospital, The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui, Zhejiang, China.
| |
Collapse
|
5
|
Wang H, Wei X, Liu L, Zhang J, Li H. Suppression of A-to-I RNA-editing enzyme ADAR1 sensitizes hepatocellular carcinoma cells to oxidative stress through regulating Keap1/Nrf2 pathway. Exp Hematol Oncol 2024; 13:30. [PMID: 38468359 DOI: 10.1186/s40164-024-00494-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 02/23/2024] [Indexed: 03/13/2024] Open
Abstract
BACKGROUND A-to-I RNA editing is an abundant post-transcriptional modification event in hepatocellular carcinoma (HCC). Evidence suggests that adenosine deaminases acting on RNA 1 (ADAR1) correlates to oxidative stress that is a crucial factor of HCC pathogenesis. The present study investigated the effect of ADAR1 on survival and oxidative stress of HCC, and underlying mechanisms. METHODS ADAR1 expression was measured in fifty HCC and normal tissues via real-time quantitative PCR, and immunohistochemistry. For stable knockdown or overexpression of ADAR1, adeno-associated virus vectors carrying sh-ADAR1 or ADAR1 overexpression were transfected into HepG2 and SMMC-7721 cells. Transfected cells were exposed to oxidative stress agonist tBHP or sorafenib Bay 43-9006. Cell proliferation, apoptosis, and oxidative stress were measured, and tumor xenograft experiment was implemented. RESULTS ADAR1 was up-regulated in HCC and correlated to unfavorable clinical outcomes. ADAR1 deficiency attenuated proliferation of HCC cells and tumor growth and enhanced apoptosis. Moreover, its loss facilitated intracellular ROS accumulation, and elevated Keap1 and lowered Nrf2 expression. Intracellular GSH content and SOD activity were decreased and MDA content was increased in the absence of ADAR1. The opposite results were observed when ADAR1 was overexpressed. The effects of tBHP and Bay 43-9006 on survival, apoptosis, intracellular ROS accumulation, and Keap1/Nrf2 pathway were further exacerbated by simultaneous inhibition of ADAR1. CONCLUSIONS The current study unveils that ADAR1 is required for survival and oxidative stress of HCC cells, and targeting ADAR1 may sensitize HCC cells to oxidative stress via modulating Keap1/Nrf2 pathway.
Collapse
Affiliation(s)
- Houhong Wang
- Department of General Surgery, The First Hospital Affiliated to Fuyang Normal University, Fuyang, 236006, Anhui, China
- Department of General Surgery, The Affiliated Bozhou Hospital of Anhui Medical University, Bozhou, 236800, Anhui, China
| | - Xiaoyu Wei
- Department of Infectious Diseases, Yongchuan Hospital of Chongqing Medical University, Chongqing, 402160, China
| | - Lu Liu
- Department of Endocrinology, The Affiliated Nantong Hospital of Shanghai Jiao Tong University, Nantong, 226001, Jiangsu, China.
| | - Junfeng Zhang
- Department of Radiology, General Hospital of Western Theater Command of PLA, Chengdu, 610083, Sichuan, China.
| | - Heng Li
- Department of Comprehensive Surgery, Anhui Provincial Cancer Hospital, West District of The First Affiliated Hospital of USTC, Hefei, 230031, Anhui, China.
| |
Collapse
|
6
|
Yang T, Liu S, Ma H, Lai H, Wang C, Ni K, Lu Y, Li W, Hu X, Zhou Z, Lou C, He D. Carnitine functions as an enhancer of NRF2 to inhibit osteoclastogenesis via regulating macrophage polarization in osteoporosis. Free Radic Biol Med 2024; 213:174-189. [PMID: 38246515 DOI: 10.1016/j.freeradbiomed.2024.01.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 01/12/2024] [Indexed: 01/23/2024]
Abstract
Osteoporosis, which manifests as reduced bone mass and deteriorated bone quality, is common in the elderly population. It is characterized by persistent elevation of macrophage-associated inflammation and active osteoclast bone resorption. Currently, the roles of intracellular metabolism in regulating these processes remain unclear. In this study, we initially performed bioinformatics analysis and observed a significant increase in the proportion of M1 macrophages in bone marrow with aging. Further metabolomics analysis demonstrated a notable reduction in the expression of carnitine metabolites in aged macrophages, while carnitine was not detected in osteoclasts. During the differentiation process, osteoclasts took up carnitine synthesized by macrophages to regulate their own activity. Mechanistically, carnitine enhanced the function of Nrf2 by inhibiting the Keap1-Nrf2 interaction, reducing the proteasome-dependent ubiquitination and degradation of Nrf2. In silico molecular ligand docking analysis of the interaction between carnitine and Keap1 showed that carnitine binds to Keap1 to stabilize Nrf2 and enhance its function. In this study, we found that the decrease in carnitine levels in aging macrophages causes overactivation of osteoclasts, ultimately leading to osteoporosis. A decrease in serum carnitine levels in patients with osteoporosis was found to have good diagnostic and predictive value. Moreover, supplementation with carnitine was shown to be effective in the treatment of osteoporosis.
Collapse
Affiliation(s)
- Tao Yang
- The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui Municipal Central Hospital, 289 Kuocang Road, Lishui, Zhejiang, 323000, PR China
| | - Shijie Liu
- The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui Municipal Central Hospital, 289 Kuocang Road, Lishui, Zhejiang, 323000, PR China
| | - Haiwei Ma
- The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui Municipal Central Hospital, 289 Kuocang Road, Lishui, Zhejiang, 323000, PR China
| | - Hehuan Lai
- The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui Municipal Central Hospital, 289 Kuocang Road, Lishui, Zhejiang, 323000, PR China
| | - Chengdi Wang
- The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui Municipal Central Hospital, 289 Kuocang Road, Lishui, Zhejiang, 323000, PR China
| | - Kainan Ni
- The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui Municipal Central Hospital, 289 Kuocang Road, Lishui, Zhejiang, 323000, PR China
| | - Yahong Lu
- The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui Municipal Central Hospital, 289 Kuocang Road, Lishui, Zhejiang, 323000, PR China
| | - Weiqing Li
- The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui Municipal Central Hospital, 289 Kuocang Road, Lishui, Zhejiang, 323000, PR China
| | - Xingyu Hu
- The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui Municipal Central Hospital, 289 Kuocang Road, Lishui, Zhejiang, 323000, PR China
| | - Zhiguo Zhou
- The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui Municipal Central Hospital, 289 Kuocang Road, Lishui, Zhejiang, 323000, PR China
| | - Chao Lou
- The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui Municipal Central Hospital, 289 Kuocang Road, Lishui, Zhejiang, 323000, PR China.
| | - Dengwei He
- The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui Municipal Central Hospital, 289 Kuocang Road, Lishui, Zhejiang, 323000, PR China.
| |
Collapse
|
7
|
Linghu KG, Zhang T, Zhang GT, Lv P, Zhang WJ, Zhao GD, Xiong SH, Ma QS, Zhao MM, Chen M, Hu YJ, Zhang CS, Yu H. Small molecule deoxynyboquinone triggers alkylation and ubiquitination of Keap1 at Cys489 on Kelch domain for Nrf2 activation and inflammatory therapy. J Pharm Anal 2024; 14:401-415. [PMID: 38618249 PMCID: PMC11010449 DOI: 10.1016/j.jpha.2023.07.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 07/13/2023] [Accepted: 07/13/2023] [Indexed: 04/16/2024] Open
Abstract
Activation of nuclear factor erythroid 2-related factor 2 (Nrf2) by Kelch-like ECH-associated protein 1 (Keap1) alkylation plays a central role in anti-inflammatory therapy. However, activators of Nrf2 through alkylation of Keap1-Kelch domain have not been identified. Deoxynyboquinone (DNQ) is a natural small molecule discovered from marine actinomycetes. The current study was designed to investigate the anti-inflammatory effects and molecular mechanisms of DNQ via alkylation of Keap1. DNQ exhibited significant anti-inflammatory properties both in vitro and in vivo. The pharmacophore responsible for the anti-inflammatory properties of DNQ was determined to be the α, β-unsaturated amides moieties by a chemical reaction between DNQ and N-acetylcysteine. DNQ exerted anti-inflammatory effects through activation of Nrf2/ARE pathway. Keap1 was demonstrated to be the direct target of DNQ and bound with DNQ through conjugate addition reaction involving alkylation. The specific alkylation site of DNQ on Keap1 for Nrf2 activation was elucidated with a synthesized probe in conjunction with liquid chromatography-tandem mass spectrometry. DNQ triggered the ubiquitination and subsequent degradation of Keap1 by alkylation of the cysteine residue 489 (Cys489) on Keap1-Kelch domain, ultimately enabling the activation of Nrf2. Our findings revealed that DNQ exhibited potent anti-inflammatory capacity through α, β-unsaturated amides moieties active group which specifically activated Nrf2 signal pathway via alkylation/ubiquitination of Keap1-Kelch domain, suggesting the potential values of targeting Cys489 on Keap1-Kelch domain by DNQ-like small molecules in inflammatory therapies.
Collapse
Affiliation(s)
- Ke-Gang Linghu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao SAR, China
- State Key Laboratory of Functions and Applications of Medicinal Plants & School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang, 550025, China
| | - Tian Zhang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao SAR, China
| | - Guang-Tao Zhang
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, RNAM Center for Marine Microbiology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Peng Lv
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao SAR, China
| | - Wen-Jun Zhang
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, RNAM Center for Marine Microbiology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Guan-Ding Zhao
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao SAR, China
| | - Shi-Hang Xiong
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao SAR, China
| | - Qiu-Shuo Ma
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao SAR, China
| | - Ming-Ming Zhao
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao SAR, China
| | - Meiwan Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao SAR, China
| | - Yuan-Jia Hu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao SAR, China
| | - Chang-Sheng Zhang
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, RNAM Center for Marine Microbiology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Hua Yu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao SAR, China
- Macao Centre for Research and Development in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao SAR, China
| |
Collapse
|
8
|
Zhou W, He H, Wei Q, Che L, Zhao X, Liu W, Yan Y, Hu L, Du Y, Yin Z, Shuai Y, Yang L, Feng R. Puerarin protects against acetaminophen-induced oxidative damage in liver through activation of the Keap1/Nrf2 signaling pathway. Food Sci Nutr 2023; 11:6604-6615. [PMID: 37823166 PMCID: PMC10563760 DOI: 10.1002/fsn3.3609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 07/08/2023] [Accepted: 07/22/2023] [Indexed: 10/13/2023] Open
Abstract
Puerarin (Pue) is a kind of isoflavone compound extracted from Pueraria lobata, which has significant antioxidant activity. Excessive use of acetaminophen (APAP) can cause oxidative stress in the liver and eventually lead to acute liver injury. The purpose of this study was to investigate the protective effect and the mechanism of puerarin on APAP-induced liver oxidative damage. In in vitro experiments, puerarin significantly increased the cell activity of HepG2 cells, reduced the ROS accumulation, alleviated the oxidative damage and mitochondrial dysfunction. In in vivo studies, our results showed that puerarin enhanced antioxidant activity and alleviated histopathological damage. Further studies showed that puerarin decreased the expression of Keap1, promoted the nuclear migration of Nrf2, and up-regulated the expression of GCLC, GCLM, HO-1 and NQO1. This study demonstrated that puerarin can protect APAP-induced liver injury via alleviating oxidative stress and mitochondrial dysfunction by affecting the nuclear migration of Nrf2 via inhibiting Keap1.
Collapse
Affiliation(s)
- Wanhai Zhou
- Sichuan Oil Cinnamon Engineering Technology Research CenterYibin UniversityYibinChina
- Faculty of Agriculture, Forestry and Food EngineeringYiBin UniversityYibinChina
| | - Heng He
- Natural Medicine Research Center, College of Veterinary MedicineSichuan Agricultural UniversityChengduChina
| | - Qin Wei
- Sichuan Oil Cinnamon Engineering Technology Research CenterYibin UniversityYibinChina
| | - Litao Che
- Sichuan Oil Cinnamon Engineering Technology Research CenterYibin UniversityYibinChina
- Faculty of Agriculture, Forestry and Food EngineeringYiBin UniversityYibinChina
| | - Xin Zhao
- Sichuan Oil Cinnamon Engineering Technology Research CenterYibin UniversityYibinChina
- Faculty of Agriculture, Forestry and Food EngineeringYiBin UniversityYibinChina
| | - Wenwen Liu
- Sichuan Oil Cinnamon Engineering Technology Research CenterYibin UniversityYibinChina
- Faculty of Agriculture, Forestry and Food EngineeringYiBin UniversityYibinChina
| | - Yue Yan
- Sichuan Oil Cinnamon Engineering Technology Research CenterYibin UniversityYibinChina
- Faculty of Agriculture, Forestry and Food EngineeringYiBin UniversityYibinChina
| | - Lianqing Hu
- Sichuan Oil Cinnamon Engineering Technology Research CenterYibin UniversityYibinChina
- Faculty of Agriculture, Forestry and Food EngineeringYiBin UniversityYibinChina
| | - Yonghua Du
- Sichuan Oil Cinnamon Engineering Technology Research CenterYibin UniversityYibinChina
- Faculty of Agriculture, Forestry and Food EngineeringYiBin UniversityYibinChina
| | - Zhongqiong Yin
- Natural Medicine Research Center, College of Veterinary MedicineSichuan Agricultural UniversityChengduChina
| | - Yongkang Shuai
- Sichuan Oil Cinnamon Engineering Technology Research CenterYibin UniversityYibinChina
| | - Li Yang
- Sichuan Oil Cinnamon Engineering Technology Research CenterYibin UniversityYibinChina
| | - Ruizhang Feng
- Sichuan Oil Cinnamon Engineering Technology Research CenterYibin UniversityYibinChina
| |
Collapse
|
9
|
Alnajem A, Al-Maghrebi M. The Regulatory Effects of JAK2/STAT3 on Spermatogenesis and the Redox Keap1/Nrf2 Axis in an Animal Model of Testicular Ischemia Reperfusion Injury. Cells 2023; 12:2292. [PMID: 37759514 PMCID: PMC10528395 DOI: 10.3390/cells12182292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 09/10/2023] [Accepted: 09/14/2023] [Indexed: 09/29/2023] Open
Abstract
The male reproductive system requires the pleiotropic activity of JAK/STAT to maintain its function, especially spermatogenesis. The study aims to investigate the effect of JAK2 signaling on the expression of the Keap1/Nrf2 axis, spermatogenesis, and the Sertoli cells (Sc) junctions in an animal model of testicular ischemia reperfusion injury (tIRI). Testes subjected to tIRI exhibited increased JAK2/STAT3 activity associated with spermatogenic arrest and reduced expression of the Sc junctions. In addition, there was an increased protein expression of Keap1 and decreased Nrf2., which was coupled with the downregulation of gene expression of antioxidant enzymes. Reduced SOD and CAT activities were accompanied by increased lipid peroxidation and protein carbonylation during tIRI. Increased caspase 9 activity and Bax/Bcl2 ratio indicated initiation of apoptosis. Inhibition of JAK2 activity by AG490 maintained the integrity of spermatogenesis and SC junctions, normalized the expression of the Keap1/Nrf2 axis and its downstream antioxidant enzymes, and prevented germ cell apoptosis. The results further emphasized the regulatory role of JAK2/STAT3 on spermatogenesis, Keap1/Nrf2 signaling, and maintenance of the testicular redox balance to combat testicular dysfunction and male infertility.
Collapse
Affiliation(s)
- Abdullah Alnajem
- Department of Medicine, Jaber Al-Ahmed Hospital, South Surra 47761, Kuwait;
| | - May Al-Maghrebi
- Department of Biochemistry, College of Medicine, Kuwait University, Safat 13110, Kuwait
| |
Collapse
|
10
|
Dong F, Yan W, Meng Q, Song X, Cheng B, Liu Y, Yao R. Ebselen alleviates white matter lesions and improves cognitive deficits by attenuating oxidative stress via Keap1/Nrf2 pathway in chronic cerebral hypoperfusion mice. Behav Brain Res 2023; 448:114444. [PMID: 37098387 DOI: 10.1016/j.bbr.2023.114444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 03/02/2023] [Accepted: 03/20/2023] [Indexed: 04/27/2023]
Abstract
Oxidative stress is crucial in cerebral white matter lesions (WMLs) induced by chronic cerebral hypoperfusion. Therefore, ameliorating oxidative damage is considered to be a beneficial strategy for the treatment of WMLs. Ebselen (EbSe), a small lipid organoselenium compound, its lipid peroxidation activity is mediated through the glutathione peroxidase-mimetic properties. This study aimed to investigate the role of EbSe in WMLs after bilateral common carotid artery stenosis (BCAS). The BCAS model can moderately reduce cerebral blood flow, and mimics white matter damage caused by chronic cerebral hypoperfusion or small vessel disease. Laser Speckle Contrast Imaging (LSCI) was used to monitor the cerebral blood flow of mice. The spatial learning and memory were tested by using the eight-arm maze. LFB staining was used to detect demyelination. The expression of MBP, GFAP and Iba1 was assayed by immunofluorescence. The demyelination was assessed by Transmission Electron Microscope (TEM). The activities of MDA, SOD and GSH-Px were detected by assay kits. The mRNA levels of SOD, GSH-Px and HO-1 was detected by realtime PCR. The activation of the Nrf2/ARE pathway and the expression of SOD, GSH-Px and HO-1was assessed by Western blot. EbSe ameliorated cognitive deficits and white matter lesions induced by bilateral common carotid artery stenosis (BCAS). The expression of GFAP and Iba1 was decreased in the corpus callosum of BCAS mice after EbSe treatment. Moreover, EbSe alleviated the level of MDA by elevating the expression and mRNA of SOD, GSH-Px and HO-1 in BCAS mice. Furthermore, EbSe promoted the dissociation of the Keap1/Nrf2 complex, resulting in the accumulation of Nrf2 in the nucleus. This study demonstrates a favorable effect of EbSe on cognitive impairment in a chronic cerebral hypoperfusion model, and the improvement of EbSe's antioxidant property is mediated by Keap1/Nrf2 pathway.
Collapse
Affiliation(s)
- Fuxing Dong
- Department of Cell Biology and Neurobiology, Xuzhou Key Laboratory of Neurobiology, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu Province, China; Public Experimental Research Center, Xuzhou Medical University, Xuzhou 221004, Jiangsu Province, China
| | - Weixing Yan
- Department of Cell Biology and Neurobiology, Xuzhou Key Laboratory of Neurobiology, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu Province, China
| | - Qiqi Meng
- Department of Cell Biology and Neurobiology, Xuzhou Key Laboratory of Neurobiology, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu Province, China
| | - Xueli Song
- Department of Cell Biology and Neurobiology, Xuzhou Key Laboratory of Neurobiology, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu Province, China
| | - Bing Cheng
- Department of Cell Biology and Neurobiology, Xuzhou Key Laboratory of Neurobiology, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu Province, China
| | - Yaping Liu
- Laboratory of National Experimental Teaching and Demonstration Center of Basic Medicine, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu Province, China
| | - Ruiqin Yao
- Department of Cell Biology and Neurobiology, Xuzhou Key Laboratory of Neurobiology, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu Province, China.
| |
Collapse
|
11
|
Liang SJ, Wang XQ. Deoxynivalenol induces intestinal injury: insights from oxidative stress and intestinal stem cells. Environ Sci Pollut Res Int 2023; 30:48676-48685. [PMID: 36856999 DOI: 10.1007/s11356-023-26084-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 02/19/2023] [Indexed: 04/16/2023]
Abstract
Mycotoxins are fungal secondary metabolites that frequently occur in human and animal diets. Deoxynivalenol (DON) is one of the most widely occurring mycotoxins globally and poses significant harm to the animal husbandry industry and human health. People are increasingly aware of the adverse effects of DON on vulnerable structures and functions in the intestine, especially in the field of intestinal stem cells (ISCs). In this review, we present insights into DON that induces oxidative stress and affects the expansion of ISCs. Related studies of strategies for reducing its harm are summarized. We also discussed promising approaches such as regulation of microbiota, molecular docking, and modulation of the redox status via reducing the expression of Keap1 protein and single-cell sequencing, which may be critical for further revealing the mechanism of DON that induces oxidative stress and affects the expansion of ISCs.
Collapse
Affiliation(s)
- Shao-Jie Liang
- Guangdong Laboratory Modern Agriculture, Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, 510642, Guangdong, China
| | - Xiu-Qi Wang
- Guangdong Laboratory Modern Agriculture, Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, 510642, Guangdong, China.
| |
Collapse
|
12
|
Zhang Z, Pang X, Wei Y, Chen H, Jin X, Lv Q. Neuroprotective effects of Chrysanthemum morifolium on cerebral ischemia- reperfusion injury contributes to the oxidative stress suppression and related Keap1/Nrf2 pathway. Brain Inj 2023; 37:269-281. [PMID: 36567616 DOI: 10.1080/02699052.2022.2158225] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND Ischemic stroke, the cause of death and disability worldwide, is closely related to oxidative stress damage. Chrysanthemum has profound antiantioxidant activity. We aimed to verify whether Chrysanthemum morifolium extract (CME) influences brain injury in cerebral ischemia-reperfusion injury (CR/RI) model. METHODS In vitro, rat hippocampal H19-7 neurons were pretreated with CME, CR/RI was simulated with oxygen glucose deprivation/reoxygenation (OGD/R). The cell viability, apoptosis, lactate dehydrogenase release, reactive oxygen species (ROS) generation, malonaldehyde (MDA) content and superoxide dismutase(SOD) activity were detected. In vivo, middle cerebral artery occlusion (MCAO) model rats were pre-administered with CME, and then behavioral test, triphenyltetrazolium chloride (TTC), hematoxylin-eosin staining (HE), terminal deoxynucleotidyltransferase-mediated dUTP-biotin nick end labeling (TUNEL), ROS immunofluorescence, MDA and SOD activity were tested. Furthermore, Keap1/Nrf2 signaling of CME in CI/RI was investigated. RESULTS In OGD/R induced in H19-7 cells, CME increased OGD/R-induced cell viability and reduced cell apoptosis, which was reversed by siNrf2 transfection . In MCAO rats, CME improved the neurological deficits and alleviated brain injury. However, co-treatment with MLK385 counteracted these neuroprotective effects of CME on MCAO rats. CONCLUSION CME could significantly reduce oxidative stress and nerve injury in vitro and in vivo models of CI/RI by regulating the Keap1/Nrf2 pathway.
Collapse
Affiliation(s)
- Zibin Zhang
- Department of Neurosurgery, Zhejiang Hospital of Integrated Traditional Chinese and Western Medicine, Hangzhou, Zhejiang, China
| | - Xiaojun Pang
- Department of Neurosurgery, Zhejiang Hospital of Integrated Traditional Chinese and Western Medicine, Hangzhou, Zhejiang, China
| | - Yuyu Wei
- Department of Neurosurgery, Zhejiang Hospital of Integrated Traditional Chinese and Western Medicine, Hangzhou, Zhejiang, China
| | - Huai Chen
- Department of Neurosurgery, Zhejiang Hospital of Integrated Traditional Chinese and Western Medicine, Hangzhou, Zhejiang, China
| | - Xuhong Jin
- Department of Neurosurgery, Zhejiang Hospital of Integrated Traditional Chinese and Western Medicine, Hangzhou, Zhejiang, China
| | - Qingping Lv
- Department of Neurosurgery, Zhejiang Hospital of Integrated Traditional Chinese and Western Medicine, Hangzhou, Zhejiang, China
| |
Collapse
|
13
|
Sharp-Tawfik A, Fletcher JD, Guergues J, Marelia-Bennett C, Wolf TJ, Coiner AM, Zhang YC, Stevens SM, Burkhardt BR. Proteomic examination of Cornus officinalis stimulated 1.1B4 human pancreatic cells reveals activation of autophagy and Keap1/Nrf2 pathway. Mol Cell Endocrinol 2022; 557:111773. [PMID: 36100124 DOI: 10.1016/j.mce.2022.111773] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 08/19/2022] [Accepted: 09/01/2022] [Indexed: 12/30/2022]
Abstract
Type 1 diabetes (T1D) is an autoimmune disease initiated by genetic predisposition and environmental influences culminating in the immunologically mediated destruction of pancreatic β-cells with eventual loss of insulin production. Although T1D can be accurately predicted via autoantibodies, therapies are lacking that can intercede autoimmunity and protect pancreatic β-cells. There are no approved interventional modalities established for this purpose. One such potential source for clinical agents of this use is from the frequently utilized Cornus officinalis (CO) in the field of ethnopharmacology. Studies by our lab and others have demonstrated that CO has robust proliferative, metabolic, and cytokine protective effects on pancreatic β-cells. To identify the molecular mechanism of the biological effects of CO, we performed a proteomic and phosphoproteomic analysis examining the cellular networks impacted by CO application on the 1.1B4 pancreatic β-cell line. Our label-free mass spectrometry approach has demonstrated significant increased phosphorylation of the selective autophagy receptor of p62 (Sequestosome-1/SQSTM1/p62) and predicted activation of the antioxidant Kelch-like ECH-associated protein 1 (Keap1)/Nuclear factor-erythroid factor 2-related factor 2 (Nrf2) pathway. Further validation by immunoblotting and immunofluorescence revealed markers of autophagy such as increased LC3-II and decreased total p62 along with nuclear localization of Nrf2. Both autophagy and the Keap1/Nrf2 pathways have been shown to be impaired in human and animal models of T1D and may serve as an excellent potential therapeutic target stimulated by CO.
Collapse
Affiliation(s)
- Arielle Sharp-Tawfik
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, Tampa, FL, 33620, USA
| | - Justin D Fletcher
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, Tampa, FL, 33620, USA
| | - Jennifer Guergues
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, Tampa, FL, 33620, USA
| | - Catherine Marelia-Bennett
- Department of Pathology & Laboratory Medicine at the Medical University of South Carolina in Charleston, SC, 29425, USA
| | - Tiara J Wolf
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, Tampa, FL, 33620, USA
| | - Alexis M Coiner
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, Tampa, FL, 33620, USA
| | - Y Clare Zhang
- Practice of Oriental Medicine, Tucson, AZ, 85716, USA
| | - Stanley M Stevens
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, Tampa, FL, 33620, USA
| | - Brant R Burkhardt
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, Tampa, FL, 33620, USA.
| |
Collapse
|
14
|
Wei YY, Zhang YN, Wang H, Ga Y, Fan Y, Wang Q, Gu JH, Zhang XY, Gong XH, Hao ZH. Mori fructus aqueous extracts attenuate carbon tetrachloride-induced renal injury via the Nrf2 pathway and intestinal flora. Ecotoxicol Environ Saf 2022; 245:114118. [PMID: 36174321 DOI: 10.1016/j.ecoenv.2022.114118] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 09/21/2022] [Accepted: 09/23/2022] [Indexed: 06/16/2023]
Abstract
Mori fructus aqueous extracts (MFAEs) have been used as a traditional Chinese medicine for thousands of years with the function of strengthening the liver and tonifying the kidney. However, its inner mechanism to alleviative renal injury is unclear. To investigate the attenuation of MFAEs on nephrotoxicity and uncover its potential molecular mechanism, we established a nephrotoxicity model induced by carbon tetrachloride (CCl4). The mice were randomly divided into control group, CCl4 model group (10% CCl4), CCl4 + low and high MFAEs groups (10% CCl4 + 100 mg/kg and 200 mg/kg MFAEs). We found that MFAEs decreased the kidney index of mice, restored the pathological changes of renal structure induced by CCl4, reduced cystatin C, neutrophil gelatinase-associated lipocalin (NGAL), kidney injury molecule 1 (Kim-1) blood urea nitrogen and creatinine contents in serum, promoted the nuclear transportation of Nrf2 (nuclear factor erythroid derived 2 like 2), elevated the expression of HO-1 (heme oxygenase 1), GPX4 (glutathione peroxidase 4), SLC7A11 (solute carrier family 7 member 11), ZO-1 (zonula occludens-1) and Occludin, suppressed the expression of Keap1 (kelch-like ECH-associated protein 1), HMGB1 (High Mobility Group Protein 1), ACSL4 (acyl-CoA synthetase long chain family member 4) and TXNIP (thioredoxin interacting protein), upregulated the flora of Akkermansia, Anaerotruncus, Clostridium_sensu_stricto, Ihubacter, Alcaligenes, Dysosmobacter, and downregulated the flora of Clostridium_XlVa, Helicobacter, Paramuribaculum. Overlapped with Disbiome database, Clostridium_XlVa, Akkermansia and Anaerotruncus may be the potential genera treated with renal injury. It indicated that MFAEs could ameliorate kidney injury caused by CCl4 via Nrf2 signaling.
Collapse
Affiliation(s)
- Yuan-Yuan Wei
- Innovation Centre of Chinese Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; Key Biology Laboratory of Chinese Veterinary Medicine, Ministry of Agriculture and Rural Affairs, China
| | - Yan-Nan Zhang
- Innovation Centre of Chinese Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; Key Biology Laboratory of Chinese Veterinary Medicine, Ministry of Agriculture and Rural Affairs, China
| | - Huiru Wang
- Innovation Centre of Chinese Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; Key Biology Laboratory of Chinese Veterinary Medicine, Ministry of Agriculture and Rural Affairs, China
| | - Yu Ga
- Innovation Centre of Chinese Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; Key Biology Laboratory of Chinese Veterinary Medicine, Ministry of Agriculture and Rural Affairs, China
| | - Yimeng Fan
- Innovation Centre of Chinese Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; Key Biology Laboratory of Chinese Veterinary Medicine, Ministry of Agriculture and Rural Affairs, China
| | - Qingtao Wang
- Key Biology Laboratory of Chinese Veterinary Medicine, Ministry of Agriculture and Rural Affairs, China
| | - Jin-Hua Gu
- Key Biology Laboratory of Chinese Veterinary Medicine, Ministry of Agriculture and Rural Affairs, China; China Institute of Veterinary Drug Control, Beijing 100193, China
| | - Xiu-Ying Zhang
- Key Biology Laboratory of Chinese Veterinary Medicine, Ministry of Agriculture and Rural Affairs, China; China Institute of Veterinary Drug Control, Beijing 100193, China
| | - Xu-Hao Gong
- Key Biology Laboratory of Chinese Veterinary Medicine, Ministry of Agriculture and Rural Affairs, China; China Institute of Veterinary Drug Control, Beijing 100193, China
| | - Zhi-Hui Hao
- Innovation Centre of Chinese Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; Key Biology Laboratory of Chinese Veterinary Medicine, Ministry of Agriculture and Rural Affairs, China.
| |
Collapse
|
15
|
Sun C, Han B, Zhai Y, Zhao H, Li X, Qian J, Hao X, Liu Q, Shen J, Kai G. Dihydrotanshinone I inhibits ovarian tumor growth by activating oxidative stress through Keap1-mediated Nrf2 ubiquitination degradation. Free Radic Biol Med 2022; 180:220-235. [PMID: 35074488 DOI: 10.1016/j.freeradbiomed.2022.01.015] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Revised: 01/12/2022] [Accepted: 01/18/2022] [Indexed: 12/20/2022]
Abstract
Dihydrotanshinone I (DHT), a bioactive compound in Salvia miltiorrhiza, was reported to exhibit cytotoxicity against various malignancies. However, the underlying mechanism on ovarian cancer remains unclear. Here, DHT inhibited cell viability of ovarian cancer HO8910PM, SKOV3, A2780 and ES2 cells. It showed moderate inhibitory effect on ovarian epithelial IOSE80 cells and lower toxicity than chemotherapy drugs. DHT induced apoptosis and G2 cell cycle arrest accompanied by reduced expression of Bcl-2, Caspase-3, and increased Bax. Meanwhile, DHT increased ROS accumulation, decreased mitochondrial membrane potential and activated oxidative stress in HO8910PM and ES2 cells. Mechanistically, DHT inhibited Nrf2 and p62 expression, Nrf2 target genes and enzymes, and Nrf2 nuclear translocation, while increased the expression of Nrf2 inhibitor Keap1. NAC, a ROS scavenger, rescued DHT-induced proliferation inhibition, ROS generation and Nrf2 inhibition. DHT alleviated tBHQ-induced Nrf2 expression and increased its mRNA level. However, the proteasome inhibitor MG132 blocked DHT-induced Nrf2 inhibition, suggesting a post-translational regulation manner. DHT enhanced Nrf2 binding with Keap1, leading to potentiated Nrf2 ubiquitination degradation. Furthermore, Nrf2 and p62 overexpression blocked DHT-induced Nrf2 and p62 inhibition. Consistent with the in vitro results, DHT significantly delayed tumor growth in HO8910PM and ES2 xenograft nude mice, decreased tumor marker HE4 and CA125 levels, reversed the abnormally expressed proteins including Ki67, Nrf2, p62, Keap1, Bcl-2, CyclinB1, Cdc-2, and antioxidant enzymes SOD, CAT in vivo. Serum from DHT-treated mice also inhibited cell growth in vitro. Taken together, DHT exhibits anti-ovarian tumor effect by activating oxidative stress through ubiquitination-mediated Nrf2 degradation. Our findings implicate a potential application of DHT for ovarian cancer therapy.
Collapse
Affiliation(s)
- Chengtao Sun
- Laboratory for Core Technology of TCM Quality Improvement and Transformation, College of Pharmaceutical Science, The Third Affiliated Hospital, Academy of Chinese Medical Science, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Bing Han
- Laboratory for Core Technology of TCM Quality Improvement and Transformation, College of Pharmaceutical Science, The Third Affiliated Hospital, Academy of Chinese Medical Science, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Yufei Zhai
- Laboratory for Core Technology of TCM Quality Improvement and Transformation, College of Pharmaceutical Science, The Third Affiliated Hospital, Academy of Chinese Medical Science, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Huan Zhao
- Laboratory for Core Technology of TCM Quality Improvement and Transformation, College of Pharmaceutical Science, The Third Affiliated Hospital, Academy of Chinese Medical Science, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Xuan Li
- Laboratory for Core Technology of TCM Quality Improvement and Transformation, College of Pharmaceutical Science, The Third Affiliated Hospital, Academy of Chinese Medical Science, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Jun Qian
- Laboratory for Core Technology of TCM Quality Improvement and Transformation, College of Pharmaceutical Science, The Third Affiliated Hospital, Academy of Chinese Medical Science, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Xiaolong Hao
- Laboratory for Core Technology of TCM Quality Improvement and Transformation, College of Pharmaceutical Science, The Third Affiliated Hospital, Academy of Chinese Medical Science, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Qun Liu
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing, 210014, China
| | - Jiayan Shen
- Laboratory for Core Technology of TCM Quality Improvement and Transformation, College of Pharmaceutical Science, The Third Affiliated Hospital, Academy of Chinese Medical Science, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Guoyin Kai
- Laboratory for Core Technology of TCM Quality Improvement and Transformation, College of Pharmaceutical Science, The Third Affiliated Hospital, Academy of Chinese Medical Science, Zhejiang Chinese Medical University, Hangzhou, 310053, China.
| |
Collapse
|
16
|
Guo L, Tang T, Fang D, Gong H, Zhang B, Zhou Y, Zhang L, Yan M. An Insight on the Pathways Involved in Crizotinib and Sunitinib Induced Hepatotoxicity in HepG2 Cells and Animal Model. Front Oncol 2022; 12:749954. [PMID: 35155225 PMCID: PMC8832280 DOI: 10.3389/fonc.2022.749954] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 01/13/2022] [Indexed: 11/22/2022] Open
Abstract
Both crizotinib and sunitinib, novel orally-active multikinase inhibitors, exhibit antitumor activity and extend the survival of patients with a malignant tumor. However, some patients may suffer liver injury that can further limit the clinical use of these drugs, however the mechanisms underlying hepatotoxicity are still to be elucidated. Thus, our study was designed to use HepG2 cells in vitro and the ICR mice model in vivo to investigate the mechanisms of hepatotoxicity induced by crizotinib and sunitinib. Male ICR mice were treated orally with crizotinib (70 mg/kg/day) or sunitinib (7.5 mg/kg/day) for four weeks. The results demonstrated that crizotinib and sunitinib caused cytotoxicity in HepG2 cells and chronic liver injury in mice, which were associated with oxidative stress, apoptosis and/or necrosis. Crizotinib- and sunitinib-induced oxidative stress was accompanied by increasing reactive oxygen species and malondialdehyde levels and decreasing the activity of superoxide dismutase and glutathione peroxidase. Notably, the activation of the Kelch-like ECH-associated protein-1/Nuclear factor erythroid-2 related factor 2 signaling pathway was involved in the process of oxidative stress, and partially protected against oxidative stress. Crizotinib and sunitinib induced apoptosis via the mitochondrial pathway, which was characterized by decreasing Bcl2/Bax ratio to dissipate the mitochondrial membrane potential, and increasing apoptotic markers levels. Moreover, the pan-caspase inhibitor Z-VAD-FMK improved the cell viability and alleviated liver damage, which further indicated the presence of apoptosis. Taken together, this study demonstrated that crizotinib- and sunitinib-caused oxidative stress and apoptosis finally impaired hepatic function, which was strongly supported by the histopathological lesions and markedly increased levels of serum alanine aminotransferase, alkaline phosphatase and lactate dehydrogenase.
Collapse
Affiliation(s)
- Lin Guo
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Tingli Tang
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Dongmei Fang
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China.,School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, China
| | - Hui Gong
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Bikui Zhang
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Yueyin Zhou
- Orthodontic Department of Xiangya Stomatology Hospital, Central South University, Changsha, China
| | - Leiyi Zhang
- Department of General Surgery, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Miao Yan
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China
| |
Collapse
|
17
|
Hu QP, Yan HX, Peng F, Feng W, Chen FF, Huang XY, Zhang X, Zhou YY, Chen YS. Genistein protects epilepsy-induced brain injury through regulating the JAK2/STAT3 and Keap1/Nrf2 signaling pathways in the developing rats. Eur J Pharmacol 2021; 912:174620. [PMID: 34752743 DOI: 10.1016/j.ejphar.2021.174620] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 10/30/2021] [Accepted: 11/03/2021] [Indexed: 01/07/2023]
Abstract
BACKGROUND Epilepsy is a common chronic neurological disease. Recurrent seizures can cause irreversible brain damage. This study aimed to explore the regulation of Genistein on JAK2/STAT3 and Keap1/Nrf2 signaling pathway and the protective effects on brain injury after epilepsy. METHODS Pentylenetetrazole (PTZ) was used to induce epilepsy in developing rats and Genistein was used for pretreatment of epilepsy. The seizure latency, grade scores and duration of the first generalized tonic-clonic seizure (GTCs) were recorded. Hippocampus tissue was sampled at 24 h post-epilepsy. Immunofluorescence staining was used to observe mature neurons, activated microglia and astrocytes in the hippocampal CA1 region. Western blot and qRT-PCR were used to determine the protein and mRNA levels of JAK2, STAT3, TNF-α, IL-1β, Keap1, Nrf2, HO-1, NQO1, caspase3, Bax and Bcl2 in the hippocampus. RESULTS Immunofluorescence showed that the number of neurons significantly decreased, and activated microglia and astrocytes significantly increased after epilepsy; Western blot and q-PCR showed that the expressions of JAK2, STAT3, TNF-α, IL-1β, Keap1, caspase3 and Bax significantly increased, while Nrf2, HO-1, NQO1 and Bcl-2 were significantly reduced after epilepsy. These effects were reversed by Genistein treatment. Moreover, Genistein was found to prolong seizure latency and reduce seizure intensity score and duration of generalized tonic-clonic seizures(GTCs) CONCLUSIONS: Genistein can activate the Keap1/Nrf2 antioxidant stress pathway and attenuate the activation of microglia and astrocytes. Genistein also inhibits the JAK2-STAT3 inflammation pathway and expression of apoptotic proteins, and increases the number of surviving neurons, thus having a protective effect on epilepsy-induced brain damage.
Collapse
Affiliation(s)
- Qing-Peng Hu
- Department of Pediatrics, the Second Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China.
| | - Hong-Xia Yan
- Department of Pediatrics, the Second Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China.
| | - Fang Peng
- Department of Pediatrics, the Second Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China.
| | - Wei Feng
- Department of Pediatrics, the Second Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China
| | - Fen-Fang Chen
- Department of Pediatrics, the Second Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China
| | - Xiang-Yi Huang
- Department of Pediatrics, the Second Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China
| | - Xin Zhang
- Department of Pediatrics, the Second Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China
| | - Yang-Yu Zhou
- Department of Pediatrics, the Second Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China
| | - Yi-Shui Chen
- Department of Pediatrics, the Second Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China
| |
Collapse
|
18
|
Cai S, Fu S, Zhang W, Yuan X, Cheng Y, Fang J. SIRT6 silencing overcomes resistance to sorafenib by promoting ferroptosis in gastric cancer. Biochem Biophys Res Commun 2021; 577:158-164. [PMID: 34530350 DOI: 10.1016/j.bbrc.2021.08.080] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 08/27/2021] [Indexed: 02/09/2023]
Abstract
Sorafenib is a tyrosine kinase inhibitor that shows anti-tumour effects against various cancers including gastric cancer (GC). However, the clinical application of sorafenib is often hampered by drug resistance. Sirtuins 6 (SIRT6) is a member of the Sirtuin family of NAD (+)-dependent enzymes that are critically involved in various biological activities. This study presents that SIRT6 silencing overcomes sorafenib resistance by promoting ferroptosis, which is a novel form of cell death. Mechanistically, SIRT6 inhibition led to the inactivation of the Keap1/Nrf2 signalling pathway and downregulation of GPX4. The overexpression of GPX4 or activation of Keap1/Nrf2 reverses the effects of the downregulation of SIRT6 on sorafenib-induced ferroptosis. Thus, targeting the SIRT6/Keap1/Nrf2/GPX4 signalling pathway may be a potential strategy for overcoming sorafenib resistance in GC.
Collapse
Affiliation(s)
- Shunv Cai
- Department of Anaesthesiology, The Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, China
| | - Shuang Fu
- Department of Anaesthesiology, The Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, China
| | - Weikang Zhang
- Department of Anaesthesiology, The Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, China
| | - Xiaohong Yuan
- Department of Anaesthesiology, The Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, China
| | - Yun Cheng
- Department of Anaesthesiology, The Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, China
| | - Jun Fang
- Department of Anaesthesiology, The Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, China.
| |
Collapse
|
19
|
Da Silveira AR, Rosa ÉVF, Sari MHM, Sampaio TB, Dos Santos JT, Jardim NS, Müller SG, Oliveira MS, Nogueira CW, Furian AF. Therapeutic potential of beta-caryophyllene against aflatoxin B1-Induced liver toxicity: biochemical and molecular insights in rats. Chem Biol Interact 2021; 348:109635. [PMID: 34506763 DOI: 10.1016/j.cbi.2021.109635] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 08/17/2021] [Accepted: 09/06/2021] [Indexed: 12/24/2022]
Abstract
Aflatoxin B1 (AFB1) is a mycotoxin highly toxic and carcinogenic to humans due to its potential to induce oxidative stress. The Beta-caryophyllene (BCP) have been highlighted for its broad spectrum of pharmacological effects. The present study aimed to investigate the beneficial effects of BCP against the susceptibility of hepatic and renal tissues to AFB1 toxicity, in biochemical parameters to assess organ function, tissue oxidation, and the immunocontent of oxidative and inflammatory proteins. Male Wistar rats was exposed to AFB1 (250 μg/kg, i.g.) and/or BCP (100 mg/kg, i.p.) for 14 successive days. It was found that exposure to AFB1 did not change the measured renal toxicity parameters. Also, AFB1 increased liver injury biomarkers (gamma glutamyl transferase and alkaline phosphatase) and reduced levels of non-enzymatic antioxidant defenses (ascorbic acid and non-protein thiol), however did not cause changes in the lipid peroxidation levels. Moreover, AFB1 interfered in oxidative pathway regulated by Kelch-like ECH-associated protein (Keap1)/nuclear factor (erythroid-derived 2)-like 2 (Nrf2), overacting Glutathione-S-Transferase (GST) activity. Lastly, a main effect of AFB1 on the total interleukin 1 beta (IL-1β) was observed. Remarkably, the associated treatment of AFB1 + BCP improved altered liver parameters. In addition, BCP and AFB1 + BCP groups showed an increase in the levels of inhibitor of nuclear factor kappa-B kinase subunit beta (IKKβ). Thus, these results indicated that BCP has potential protective effect against AFB1 induced hepatotoxicity.
Collapse
Affiliation(s)
- Alice Rosa Da Silveira
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil
| | - Érica Vanessa Furlan Rosa
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil
| | | | - Tuane Bazanella Sampaio
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil
| | - Jamila Trindade Dos Santos
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil
| | - Natália Silva Jardim
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil
| | - Sabrina Grendene Müller
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil
| | - Mauro Schneider Oliveira
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil
| | - Cristina Wayne Nogueira
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil
| | - Ana Flávia Furian
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil; Programa de Pós-Graduação em Ciência e Tecnologia dos Alimentos, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil.
| |
Collapse
|
20
|
Scassellati C, Galoforo AC, Esposito C, Ciani M, Ricevuti G, Bonvicini C. Promising Intervention Approaches to Potentially Resolve Neuroinflammation And Steroid Hormones Alterations in Alzheimer's Disease and Its Neuropsychiatric Symptoms. Aging Dis 2021; 12:1337-1357. [PMID: 34341712 PMCID: PMC8279527 DOI: 10.14336/ad.2021.0122] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 01/22/2021] [Indexed: 12/11/2022] Open
Abstract
Neuroinflammation is a biological process by which the central nervous system responds to stimuli/injuries affecting its homeostasis. So far as this reactive response becomes exacerbated and uncontrolled, it can lead to neurodegeneration, compromising the cognitive and neuropsychiatric domains. Parallelly, modifications in the hypothalamic signaling of neuroprotective hormones linked also to the inflammatory responses of microglia and astrocytes can exacerbate these processes. To complicate the picture, modulations in the gut microbiota (GM) can induce changes in neuroinflammation, altering cognitive and neuropsychiatric functioning. We conducted a web-based search on PubMed. We described studies regarding the cross-talk among microglia and astrocytes in the neuroinflammation processes, along with the role played by the steroid hormones, and how this can reflect on cognitive decline/neurodegeneration, in particular on Alzheimer's Disease (AD) and its neuropsychiatric manifestations. We propose and support the huge literature showing the potentiality of complementary/alternative therapeutic approaches (nutraceuticals) targeting the sustained inflammatory response, the dysregulation of hypothalamic system and the GM composition. NF-κB and Keap1/Nrf2 are the main molecular targets on which a list of nutraceuticals can modulate the altered processes. Since there are some limitations, we propose a new intervention natural treatment in terms of Oxygen-ozone (O2-O3) therapy that could be potentially used for AD pathology. Through a meta-analytic approach, we found a significant modulation of O3 on inflammation-NF-κB/NLRP3 inflammasome/Toll-Like Receptor 4 (TLR4)/Interleukin IL-17α signalling, reducing mRNA (p<0.00001 Odd Ratio (OR)=-5.25 95% CI:-7.04/-3.46) and protein (p<0.00001 OR=-4.85 95%CI:-6.89/-2.81) levels, as well as on Keap1/Nrf2 pathway. Through anti-inflammatory, immune, and steroid hormones modulation and anti-microbial activities, O3 at mild therapeutic concentrations potentiated with nutraceuticals and GM regulators could determine combinatorial effects impacting on cognitive and neurodegenerative domains, neuroinflammation and neuroendocrine signalling, directly or indirectly through the mediation of GM.
Collapse
Affiliation(s)
- Catia Scassellati
- Biological Psychiatry Unit, IRCCS Istituto Centro San Giovanni di Dio Fatebenefratelli, Brescia, Italy.
| | - Antonio Carlo Galoforo
- Oxygen-Ozone Therapy Scientific Society (SIOOT), Gorle, Italy.
- University of Pavia, Pavia, Italy.
| | - Ciro Esposito
- Department of Internal Medicine and Therapeutics, University of Pavia, Italy.
- Nephrology and dialysis unit, ICS S. Maugeri SPA SB Hospital, Pavia, Italy.
- P.D. High School in Geriatrics, University of Pavia, Italy.
| | - Miriam Ciani
- Molecular Markers Laboratory, IRCCS Istituto Centro San Giovanni di Dio Fatebenefratelli, Brescia, Italy.
| | - Giovanni Ricevuti
- P.D. High School in Geriatrics, University of Pavia, Italy.
- Department of Drug Sciences, University of Pavia, Italy.
- St. Camillus Medical University, Rome, Italy.
| | - Cristian Bonvicini
- Molecular Markers Laboratory, IRCCS Istituto Centro San Giovanni di Dio Fatebenefratelli, Brescia, Italy.
| |
Collapse
|
21
|
Gao F, Fu K, Li H, Feng Y, Tian W, Cao R. Chlorogenic acid ameliorates mice clinical endometritis by activating Keap1/Nrf2 and inhibiting NFκB signalling pathway. J Pharm Pharmacol 2021; 73:785-795. [PMID: 33734387 DOI: 10.1093/jpp/rgab020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 01/25/2021] [Indexed: 01/01/2023]
Abstract
OBJECTIVES Clinical endometritis is a common reproductive disorder in mammals that seriously endangers animal health and causes economic losses worldwide. This study aims to use lipopolysaccharide and Trueperella pyogenes exotoxin as modelling reagents (LC) to perfuse the mouse uterus in order to establish a model of clinical endometritis and to investigate the anti-inflammatory and antioxidant effects of chlorogenic acid (CGA). METHODS In this study, five LC uterine perfusions were selected to model clinical endometritis. The anti-inflammatory and antioxidant effects of CGA were clarified. Through HE staining, proinflammatory cytokines, blood testing, NFκB and Keap1/Nrf2 signalling pathways and other index changes to explore the protection mechanism of CGA. KEY FINDINGS After CGA treatment, the appearance, inflammatory damage and blood indicators of the mouse uterus returned to normal. Simultaneously, CGA could inhibit the activation of NFκB and reduce the release of inflammatory cytokines; CGA could also activate Keap1/Nrf2, promote the dissociation of Keap1 and Nrf2 and significantly increase the expression of the downstream genes HO-1 and NQO1. CONCLUSIONS The above results together explain that five LC uterine perfusions can be used to establish a mouse model of clinical endometritis. CGA can treat clinical endometritis by activating Keap1/Nrf2 and inhibiting the NFκB signalling pathway.
Collapse
Affiliation(s)
- Feng Gao
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, China
| | - Kaiqiang Fu
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, China
| | - Huatao Li
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, China
| | - Yanni Feng
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, China
| | - Wenru Tian
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, China
| | - Rongfeng Cao
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, China
| |
Collapse
|
22
|
Chang X, Dong S, Bai W, Di Y, Gu R, Liu F, Zhao B, Wang Y, Liu X. Methylated Metabolites of Chicoric Acid Ameliorate Hydrogen Peroxide (H 2O 2)-Induced Oxidative Stress in HepG2 Cells. J Agric Food Chem 2021; 69:2179-2189. [PMID: 33577312 DOI: 10.1021/acs.jafc.0c07521] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Chicoric acid (CA) can display health benefits as a dietary polyphenol. However, as CA is widely metabolized in vivo, the actual compounds responsible for its bioactivities are not entirely known. Herein, the major methylated metabolites of CA were isolated from an in vitro co-incubation system, and their structures were elucidated. The antioxidant activities of the monomethylated metabolites (M1) and dimethylated metabolites (M2) of CA were evaluated against H2O2-induced oxidative stress damage in HepG2 cells and compared to CA. The results indicated that both M1 and M2 had better antioxidant capacities than CA by increasing cell viability, improving mitochondrial function, and balancing cellular redox status. These compounds also prevented oxidative stress by mediating the Keap1/Nrf2 transcriptional pathway and downregulating enzyme activity. The current research indicates that the methylated metabolites of CA could potentially be the candidates that are responsible for the biological efficacies attributed to CA.
Collapse
Affiliation(s)
- Xiaowen Chang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Shan Dong
- Shenzhen Academy of Metrology and Quality Inspection, National Nutrition Food Testing Center (Guangdong), Shenzhen 518000, China
| | - Wenliang Bai
- Shenzhen Academy of Metrology and Quality Inspection, National Nutrition Food Testing Center (Guangdong), Shenzhen 518000, China
| | - Yan Di
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Ruijuan Gu
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Fuguo Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories 999077, Hong Kong, China
| | - Beita Zhao
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Yutang Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Xuebo Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| |
Collapse
|
23
|
Tonolo F, Moretto L, Grinzato A, Fiorese F, Folda A, Scalcon V, Ferro S, Arrigoni G, Bellamio M, Feller E, Bindoli A, Marin O, Rigobello MP. Fermented Soy-Derived Bioactive Peptides Selected by a Molecular Docking Approach Show Antioxidant Properties Involving the Keap1/Nrf2 Pathway. Antioxidants (Basel) 2020; 9:E1306. [PMID: 33352784 DOI: 10.3390/antiox9121306] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 12/11/2020] [Accepted: 12/16/2020] [Indexed: 11/23/2022] Open
Abstract
Bioactive peptides are a group of molecules with health beneficial properties, deriving from food matrices. They are protein fragments consisting of 2–20 amino acids that can be released by microbial fermentation, food processing and gastrointestinal digestion. Once hydrolyzed from their native proteins, they can have different functions including antioxidant activity, which is important for cell protection by oxidant agents. In this work, fermented soy products were digested in vitro in order to improve the release of bioactive peptides. These were extracted, purified and analyzed in vitro and in a cellular model to assess their antioxidant activity. Peptide sequences were identified by LC-MS/MS analysis and a molecular docking approach was used to predict their ability to interact with Keap1, one of the key proteins of the Keap1/Nrf2 pathway, the major system involved in redox regulation. Peptides showing a high score of interaction were selected and tested for their antioxidant properties in a cellular environment using the Caco-2 cell line and examined for their capability to defend cells against oxidative stress. Our results indicate that several of the selected peptides were indeed able to activate the Keap1/Nrf2 pathway with the consequent overexpression of antioxidant and phase II enzymes.
Collapse
|
24
|
Ma Y, Pan C, Tang X, Zhang M, Shi H, Wang T, Zhang Y. MicroRNA-200a represses myocardial infarction-related cell death and inflammation by targeting the Keap1/Nrf2 and β-catenin pathways. Hellenic J Cardiol 2020; 62:139-148. [PMID: 33197602 DOI: 10.1016/j.hjc.2020.10.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 10/24/2020] [Accepted: 10/27/2020] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND Acute myocardial infarction (MI) is a main cause of emergency death in the world. MicroRNAs (miRs/miRNAs) are a series of small non-coding RNA molecules, which regulate cardiovascular disorders that involve MI. In this study, we explored the function of miR-200a in MI treatment. METHODS We observed down-regulation of miR-200a levels and up-regulation of Keap1 and β-catenin levels in H2O2-treated newborn murine ventricular cardiomyocytes (NMVCs) and the infarcted heart tissues of MI mouse models, compared to the non-treated NMVCs and normal heart tissues of healthy mice. RESULTS CCK-8 and colony formation assays indicated the reduction in NMVC vitality due to H2O2 treatment and the recovery of cell vitality due to miR-200a overexpression, respectively. Flow cytometry with Annexin and PI staining indicated the inhibition of H2O2-triggered cell apoptosis through ectopically expressed miR-200a. Western blotting and ELISA analyses that detected pro-inflammatory cell factors [interleukin (IL)-1β, IL-6, and tumor necrosis factor (TNF)-α] confirmed that miR-200a prevented H2O2-induced NMVC inflammation. Moreover, miR-200a inhibited up-regulation of Keap1 and β-catenin expression in H2O2-treated NMVCs by directly binding with the 3'-UTR regions of both Keap1 and β-catenin. Furthermore, overexpression of Keap1 and β-cateninin in H2O2-treated NMVCs with recovered miR-200a elevated inflammation and apoptosis, respectively. CONCLUSION The results showed that miR-200a expression was inhibited in murine cardiomyocytes due to H2O2 stress in MI cardiac tissues and overexpressed miR-200a could protect the cells from death by regulating the Keap1/Nrf2 and β-catenin signal transduction pathways.
Collapse
Affiliation(s)
- Yi Ma
- Department of Radiology, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Changzhou, Jiangsu, 213164, China.
| | - Changjie Pan
- Department of Radiology, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Changzhou, Jiangsu, 213164, China.
| | - Xiaoqiang Tang
- Department of Radiology, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Changzhou, Jiangsu, 213164, China.
| | - Ming Zhang
- Department of Radiology, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Changzhou, Jiangsu, 213164, China.
| | - Haifeng Shi
- Department of Radiology, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Changzhou, Jiangsu, 213164, China.
| | - Tao Wang
- Department of Radiology, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Changzhou, Jiangsu, 213164, China.
| | - Yong Zhang
- Department of Radiology, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Changzhou, Jiangsu, 213164, China.
| |
Collapse
|
25
|
L Suraweera T, Rupasinghe HPV, Dellaire G, Xu Z. Regulation of Nrf2/ARE Pathway by Dietary Flavonoids: A Friend or Foe for Cancer Management? Antioxidants (Basel) 2020; 9:E973. [PMID: 33050575 DOI: 10.3390/antiox9100973] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 10/04/2020] [Accepted: 10/07/2020] [Indexed: 12/25/2022] Open
Abstract
The nuclear factor erythroid 2-related factor 2 (Nrf2)/antioxidant response element (ARE) pathway is an important cell signaling mechanism in maintaining redox homeostasis in humans. The role of dietary flavonoids in activating Nrf2/ARE in relation to cancer chemoprevention or cancer promotion is not well established. Here we summarize the dual effects of flavonoids in cancer chemoprevention and cancer promotion with respect to the regulation of the Nrf2/ARE pathway, while underlying the possible cellular mechanisms. Luteolin, apigenin, quercetin, myricetin, rutin, naringenin, epicatechin, and genistein activate the Nrf2/ARE pathway in both normal and cancer cells. The hormetic effect of flavonoids has been observed due to their antioxidant or prooxidant activity, depending on the concentrations. Reported in vitro and in vivo investigations suggest that the activation of the Nrf2/ARE pathway by either endogenous or exogenous stimuli under normal physiological conditions contributes to redox homeostasis, which may provide a mechanism for cancer chemoprevention. However, some flavonoids, such as luteolin, apigenin, myricetin, quercetin, naringenin, epicatechin, genistein, and daidzein, at low concentrations (1.5 to 20 µM) facilitate cancer cell growth and proliferation in vitro. Paradoxically, some flavonoids, including luteolin, apigenin, and chrysin, inhibit the Nrf2/ARE pathway in vitro. Therefore, even though flavonoids play a major role in cancer chemoprevention, due to their possible inducement of cancer cell growth, the effects of dietary flavonoids on cancer pathophysiology in patients or appropriate experimental animal models should be investigated systematically.
Collapse
|
26
|
Wei X, Fan X, Feng Z, Ma Y, Lan X, Chen M. Ethyl acetate extract of herpetospermum pedunculosum alleviates α-naphthylisothiocyanate-induced cholestasis by activating the farnesoid x receptor and suppressing oxidative stress and inflammation in rats. Phytomedicine 2020; 76:153257. [PMID: 32534360 DOI: 10.1016/j.phymed.2020.153257] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 05/08/2020] [Accepted: 05/29/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Traditionally, seeds of Herpetospermum pedunculosum were used to treat liver disease or cholepathy. Up to date, their protecting effect against cholestasis was remain unclarified. PURPOSE To investigate the efficacy, possible mechanisms, and active constituents of the ethyl acetate extract from the seeds of Herpetospermum pedunculosum (HPEAE), studies were carried out using cholestasis rat model induced by α-naphthylisothiocyanate (ANIT). METHODS Male rats were intragastrically treated with HPEAE (100, 200 or 400 mg/kg) once a day for 7 days and were modeled with ANIT (60 mg/kg). The levels of serum indicators, bile flow, and histopathology were evaluated. Indices of oxidative stress and inflammatory mediators were detected using the enzyme-linked immunosorbent assay. Western blotting method was employed for analyzing the protein levels in the signal pathways of farnesoid X receptor (FXR), kelch ech associating protein 1/nuclear factor erythroid 2-related factor 2 (Keap1/Nrf2) and nuclear factor κB (NF-κB). The chemical compositions of HPEAE was analyzed by HPLC, and partially chemical components of HPEAE were identified by comparisons of their retention times with the standards. The FXR agonistic activity of the identified compounds was evaluated in l-02 cells induced by guggulsterone using a high-content screening system. RESULTS The cholestasis caused by ANIT can be significantly ameliorated by restoring the liver function indexes of alanine transaminase, aspartate transaminase, alkaline phosphatase, gamma-glutamyltransferase, total bilirubin, direct bilirubin and total bile acid, which are dose-dependent, as well as pathological liver injury and bile flow. Mechanical studies suggested that HPEAE can activate the expression of FXR and then up regulate its downstream proteins (multidrug resistance-associated protein 2, bile salt export pump and Na+/taurocholate cotransporting polypeptide). Moreover, the levels of the active oxygen index glutathione, superoxide dismutase, glutathione peroxidase, catalase and malondialdehyde were markedly restored by treatment with HPEAE. Western blotting further confirmed that HPEAE up regulated the expression of quinone oxidoreductase 1, heme oxygenase 1 and Keap1, lowered the expression of Nrf2 and reduced oxidative stress. HPEAE also up regulated P-glycoprotein 65, phosphorylated P-glycoprotein 65 and inhibitor of NF-κB kinase α expression, down regulated inhibitor of NF-κB (IκB), restored inflammatory mediator tumor necrosis factor-α, interleukin-1β (IL-1β), IL-6 and IL-10, and reduced inflammatory response. Fifteen compounds were identified (12 lignans and 3 coumarins). Among them, five lignans exhibited the significant FXR agonistic activity in vitro. CONCLUSION HPEAE may alleviate the cholestasis and liver injury caused by ANIT in rats by activating FXR, as well as suppressing the Keap1/Nrf2 and NF-κB signaling pathways and lignans may be its main active components.
Collapse
Affiliation(s)
- Xiaodong Wei
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, P.R. China
| | - Xudong Fan
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, P.R. China
| | - Zhiying Feng
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, P.R. China
| | - Yingxiong Ma
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, P.R. China
| | - Xiaozhong Lan
- TAAHC-SWU Medicinal Plant R&D Center, XiZang Agriculture and Animal Husbandry College, Nyingchi, Tibet, P.R. China
| | - Min Chen
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, P.R. China.
| |
Collapse
|
27
|
Yang J, Song X, Feng Y, Liu N, Fu Z, Wu J, Li T, Chen H, Chen J, Chen C, Yang L. Natural ingredients-derived antioxidants attenuate H 2O 2-induced oxidative stress and have chondroprotective effects on human osteoarthritic chondrocytes via Keap1/Nrf2 pathway. Free Radic Biol Med 2020; 152:854-864. [PMID: 32014502 DOI: 10.1016/j.freeradbiomed.2020.01.185] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 01/14/2020] [Accepted: 01/28/2020] [Indexed: 12/27/2022]
Abstract
Osteoarthritis (OA) is the most common disabling joint disease and its pathological process is closely related to oxidative stress. Recent studies have shown that antioxidants allicin, sulforaphane, and lycopene derived from natural ingredients garlic, broccoli, and tomato can reduce the degree of oxidative stress and the expression of inflammatory markers, indicating that theses antioxidants might be helpful for OA treatment. In this study, we investigated the effects of allicin, sulforaphane, and lycopene on H2O2-stimulated human osteochondral samples and osteoarthritic chondrocytes. Our results revealed that allicin, sulforaphane, and lycopene effectively reduced the oxidative stress-induced cell apoptosis, and increased gene expression of antioxidant enzymes. Besides, these natural ingredients-derived antioxidants reduced the expression of inflammatory factors, enhanced the chondrogenic matrix synthesis, and reduced the hypertrophic differentiation of osteoarthritic chondrocytes. These regulations were mainly through the activation of Keap1/Nrf2 pathway. Our findings suggest that these antioxidants might be a potential therapeutic strategy for OA.
Collapse
Affiliation(s)
- Junjun Yang
- Center for Joint Surgery, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Xiongbo Song
- Center for Joint Surgery, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Yong Feng
- Department of Orthopedics, Central Hospital of Chongqing University, Chongqing, 400014, China
| | - Na Liu
- Center for Joint Surgery, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, 400038, China; Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Laboratory of Molecular Developmental Biology, School of Life Sciences, Southwest University, Chongqing, 400038, China
| | - Zhenlan Fu
- Center for Joint Surgery, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Jiangyi Wu
- Department of Sports Medicine, Peking University Shenzhen Hospital, Shenzhen, 518036, China
| | - Tao Li
- Center for Joint Surgery, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Hao Chen
- Center for Joint Surgery, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Jiajia Chen
- Biomedical Analysis Center, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Cheng Chen
- College of Medical Informatics, Chongqing Medical University, Chongqing, 400016, China.
| | - Liu Yang
- Center for Joint Surgery, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, 400038, China.
| |
Collapse
|
28
|
Xiao L, Liang S, Ge L, Wan H, Wu W, Fei J, Wu S, Zhou B, Zeng X. 4,5-di-O-caffeoylquinic acid methyl ester isolated from Lonicera japonica Thunb. targets the Keap1/Nrf2 pathway to attenuate H 2O 2-induced liver oxidative damage in HepG2 cells. Phytomedicine 2020; 70:153219. [PMID: 32361557 DOI: 10.1016/j.phymed.2020.153219] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 02/17/2020] [Accepted: 03/27/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND 4,5-di-O-caffeoylquinic acid methyl ester (4,5-CQME) is a caffeoylquinic acid (CQA) isolated from Lonicera japonica Thunb., a traditional Chinese medicine. To date, the biological activity of 4,5-CQME has not been fully investigated. PURPOSE The aim of the current study was to explore the anti-oxidative activity and the underlying mechanism of 4,5-CQME. METHODS MTT assay was used to evaluate the cytoprotective effect of 4,5-CQME. DCFH-DA was used as a fluorescence probe to detect intracellular ROS. The mitochondrial membrane potential was detected using the fluorescent probe JC-1. MDA and GSH levels were measured using MDA and GSH commercial kits, respectively. Apoptosis assay was performed using the Annexin V-FITC/PI method. The functional mechanism of 4,5-CQME was investigated by analyzing relative signaling pathways through immunofluorescent staining, quantitative PCR and western blot analysis. RESULTS HepG2 cells were incubated with different concentrations of 4,5-CQME for 12 h before exposure to 500 μM H2O2 for 3 h. 4,5-CQME attenuated H2O2-induced oxidative damage and had a higher cytoprotective effect than 3-caffeoylquinic acid, 3-caffeoylquinic acid methyl ester, or 4,5-di-O-caffeoylquinic acid. 4,5-CQME also reduced ROS and MDA levels and rescued GSH depletion. Western blots demonstrated that 4,5-CQME decreased Bax/Bcl-2 and Bak levels. A mechanistic study confirmed that 4,5-CQME significantly suppressed H2O2-induced MAPKs phosphorylation but had little effect on MAPKs phosphorylation under normal conditions. By contrast, 4,5-CQME induced AKT phosphorylation in the presence or absence of H2O2. 4,5-CQME also regulated the Keap1/Nrf2 signaling pathway and enhanced both the mRNA and protein expressions of HO-1 and NQO1. The anti-oxidative effect of 4,5-CQME was greatly abolished by co-incubation with the Nrf2 inhibitor ML385 or PI3K inhibitor wortmannin. CONCLUSIONS Taken together, these results showed that 4,5-CQME offered significant protection against H2O2-induced oxidative stress, and its effect was in part due to the modulation of the Keap1/Nrf2 pathway.
Collapse
Affiliation(s)
- Lingyun Xiao
- Centre Lab of Longhua Branch and Department of Infectious Disease, 2nd Clinical Medical College (Shenzhen People's Hospital) of Jinan University, Shenzhen 518020, Guangdong Province, China; Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University, Guangzhou 510632, Guangdong Province, China
| | - Shu Liang
- Centre Lab of Longhua Branch and Department of Infectious Disease, 2nd Clinical Medical College (Shenzhen People's Hospital) of Jinan University, Shenzhen 518020, Guangdong Province, China
| | - Lanlan Ge
- Centre Lab of Longhua Branch and Department of Infectious Disease, 2nd Clinical Medical College (Shenzhen People's Hospital) of Jinan University, Shenzhen 518020, Guangdong Province, China; Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University, Guangzhou 510632, Guangdong Province, China
| | - Haoqiang Wan
- Centre Lab of Longhua Branch and Department of Infectious Disease, 2nd Clinical Medical College (Shenzhen People's Hospital) of Jinan University, Shenzhen 518020, Guangdong Province, China; Department of Pathology (Longhua Branch), 2nd Clinical Medical College (Shenzhen People's Hospital) of Jinan University, Shenzhen 518020, Guangdong Province, China
| | - Weigang Wu
- Centre Lab of Longhua Branch and Department of Infectious Disease, 2nd Clinical Medical College (Shenzhen People's Hospital) of Jinan University, Shenzhen 518020, Guangdong Province, China
| | - Jia Fei
- Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University, Guangzhou 510632, Guangdong Province, China
| | - Shipin Wu
- Centre Lab of Longhua Branch and Department of Infectious Disease, 2nd Clinical Medical College (Shenzhen People's Hospital) of Jinan University, Shenzhen 518020, Guangdong Province, China
| | - Boping Zhou
- Centre Lab of Longhua Branch and Department of Infectious Disease, 2nd Clinical Medical College (Shenzhen People's Hospital) of Jinan University, Shenzhen 518020, Guangdong Province, China.
| | - Xiaobin Zeng
- Centre Lab of Longhua Branch and Department of Infectious Disease, 2nd Clinical Medical College (Shenzhen People's Hospital) of Jinan University, Shenzhen 518020, Guangdong Province, China; Department of Pathology (Longhua Branch), 2nd Clinical Medical College (Shenzhen People's Hospital) of Jinan University, Shenzhen 518020, Guangdong Province, China; Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Medicine School of Shenzhen University, Shenzhen 518037, Guangdong Province, China.
| |
Collapse
|
29
|
Mo M, Li S, Dong Z, Li C, Sun Y, Li A, Zhao Z. S-allylmercaptocysteine ameliorates lipopolysaccharide-induced acute lung injury in mice by inhibiting inflammation and oxidative stress via nuclear factor kappa B and Keap1/Nrf2 pathways. Int Immunopharmacol 2020; 81:106273. [PMID: 32070920 DOI: 10.1016/j.intimp.2020.106273] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 01/19/2020] [Accepted: 01/30/2020] [Indexed: 10/24/2022]
Abstract
The garlic-derived organosulfur compound S-allylmercaptocysteine (SAMC) has been reported to exhibit anti-inflammatory and anti-oxidative activities, whereas its potential therapeutic effect on lipopolysaccharide (LPS)-induced acute lung injury (ALI) is unknown. In this study, we focused on exploring the therapeutic effects of SAMC on LPS-induced ALI mice and the involvement of underlying molecular mechanisms. BalB/c mice were treated with SAMC (10, 30 and 60 mg/kg) or positive control N-acetylcysteine (NAC, 500 mg/kg) by gavage after intratracheal instillation of LPS for 30 min and were sacrificed 24 h after LPS administration. Our results indicate that the treatment with SAMC not only ameliorated the histological changes but also decreased LPS-triggered lung edema. Moreover, SAMC displayed an anti-inflammatory effect through reducing inflammatory cells infiltration, myeloperoxidase (MPO) formation and inhibiting pro-inflammatory cytokines/mediator production including tumor necrosis factor alpha (TNF-α), interleukin-1β (IL-1β), interleukin-6 (IL-6), inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX2) via suppressing the activation of nuclear factor-kappaB (NF-κB) signaling pathway. Furthermore, SAMC attenuated oxidative stress evoked by LPS via diminishing malondialdehyde (MDA) formation and reversing glutathione (GSH) and superoxide dismutase (SOD) depletion. Meanwhile, SAMC up-regulated expressions of endogenous antioxidant/detoxifying proteins including heme oxygenase-1 (HO-1) and NAD(P)H: quinone oxidoreductase 1(NQO1) through reversing the suppression of Kelch-like ECH-associated protein 1 (Keap1)/nuclear factor erythroid-2 related factor 2 (Nrf2) signaling pathway. Our results demonstrate that SAMC effectively attenuated LPS-induced ALI which was largely dependent upon inhibition of inflammation and oxidative stress via NF-κB and Keap1/Nrf2 signaling pathways.
Collapse
Affiliation(s)
- Min Mo
- School of Pharmaceutical Sciences, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, China; Shandong Key University Laboratory of Pharmaceutics & Drug Delivery Systems, 44 West Wenhua Road, Jinan, Shandong 250012, China
| | - Siying Li
- School of Basic Medical Sciences, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, China
| | - Zhonghua Dong
- School of Pharmaceutical Sciences, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, China; Shandong Key University Laboratory of Pharmaceutics & Drug Delivery Systems, 44 West Wenhua Road, Jinan, Shandong 250012, China
| | - Chunyan Li
- School of Pharmaceutical Sciences, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, China; Shandong Key University Laboratory of Pharmaceutics & Drug Delivery Systems, 44 West Wenhua Road, Jinan, Shandong 250012, China
| | - Yueyue Sun
- School of Pharmaceutical Sciences, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, China; Shandong Key University Laboratory of Pharmaceutics & Drug Delivery Systems, 44 West Wenhua Road, Jinan, Shandong 250012, China
| | - Ang Li
- Department of Pharmacy, The Second Hospital of Shandong University, Jinan, Shandong 250033, China
| | - Zhongxi Zhao
- School of Pharmaceutical Sciences, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, China; Shandong Key University Laboratory of Pharmaceutics & Drug Delivery Systems, 44 West Wenhua Road, Jinan, Shandong 250012, China.
| |
Collapse
|
30
|
Lin Y, Zheng X, Chen J, Luo D, Xie J, Su Z, Huang X, Yi X, Wei L, Cai J, Sun Z. Protective Effect of Bruguiera gymnorrhiza (L.) Lam. Fruit on Dextran Sulfate Sodium-Induced Ulcerative Colitis in Mice: Role of Keap1/Nrf2 Pathway and Gut Microbiota. Front Pharmacol 2020; 10:1602. [PMID: 32116661 PMCID: PMC7008401 DOI: 10.3389/fphar.2019.01602] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 12/10/2019] [Indexed: 12/13/2022] Open
Abstract
Bruguiera gymnorrhiza (BG), a medicinal mangrove, and its fruit (a food material) (BGF), have traditionally been used to treat diarrhea (also known as ulcerative colitis) in folk medicine. However, the mechanism of action against colitis remains ambiguous. This study aimed to investigate the potential efficacy and mechanism of BGF on experimental colitis. Colitis was induced by oral intake of dextran sulfate sodium (DSS) and treated with aqueous extract of BGF (25, 50 and 100 mg/kg) for a week. The Disease Activity Index (DAI), colon length, and histological changes of colon were analyzed. The inflammatory and oxidative stress status was explored. The protein expression of Nrf2 and Keap1 in the colon was detected by Western blotting. The mRNA expression of Nrf2 downstream genes (GCLC, GCLM, HO-1 and NQO1) was determined by RT-PCR. Furthermore, the effect on intestinal flora was analyzed. Results indicated that BGF was rich in pinitol, and showed strong antioxidative activity in vitro. Compared with the DSS model, BGF effectively reduced the body weight loss and DAI, restored the colon length, repaired colonic pathological variations, and decreased the histological scores, which was superior to salicylazosulfapyridine (SASP) with smaller dosage. Moreover, BGF not only abated the levels of MDA and inflammatory mediators (TNF-α, IL-6, IL-1β, and IFN-γ), increased the level of IL-10, but also prevented the depletion of SOD and GSH. BGF upregulated the protein level of nuclear Nrf2 and mRNA levels of GCLC, GCLM, HO-1 and NQO1, while significantly inhibited the protein expression of Keap1 and cytosolic Nrf2. Besides, BGF promoted the growth of probiotics (Bifidobacterium, Anaerotruncus, and Lactobacillus) in the gut, and inhibited the colonization of pathogenic bacteria (Bacteroides and Streptococcus), which contributed to the maintenance of intestinal homeostasis. BGF possessed protective effect against DSS-induced colitis. The potential mechanism of BGF may involve the amelioration of inflammatory and oxidative status, activation of Keap1/Nrf2 signaling pathway, and maintenance of micro-ecological balance of the host. This study provides experimental evidence for the traditional application of BGF in the treatment of diarrhea, and indicates that BGF may be a promising candidate against colitis.
Collapse
Affiliation(s)
- Yinsi Lin
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xinghan Zheng
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jinfen Chen
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Dandan Luo
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jianhui Xie
- Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, The Second Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Ziren Su
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xiaoqi Huang
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xiaoqing Yi
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangzhou, China
- Guangdong Academy of Forestry, Guangzhou, China
| | - Long Wei
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangzhou, China
- Guangdong Academy of Forestry, Guangzhou, China
| | - Jian Cai
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangzhou, China
- Guangdong Academy of Forestry, Guangzhou, China
| | - Zhanghua Sun
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, China
| |
Collapse
|
31
|
Zhang J, Jiao Q, Kong L, Yu J, Fang A, Li M, Yu J. Nrf2 and Keap1 abnormalities in esophageal squamous cell carcinoma and association with the effect of chemoradiotherapy. Thorac Cancer 2018; 9:726-735. [PMID: 29675925 PMCID: PMC5983206 DOI: 10.1111/1759-7714.12640] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Accepted: 03/18/2018] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND The Keap1-Nrf2 pathway is a key antioxidant and redox signaling cascade. Pathway abnormalities enhance the reactive oxygen species scavenging ability of cancer cells; thus the pathway is involved in carcinogenesis and resistance to chemoradiotherapy (CRT). This retrospective study was conducted to examine the status of the Keap1-Nrf2 pathway in locally advanced esophageal squamous cell carcinoma (ESCC) and to analyze its prognostic value in patients receiving CRT. METHODS Nrf2 and Keap1 expression were immunohistochemically examined in 152 ESCC and 31 normal esophageal mucosae. All ESCC specimens were obtained from patients with locally advanced ESCC who underwent CRT. RESULTS Strong staining of nuclear and cytoplasmic Nrf2 and limited or absent Keap1 expression was uncommon in normal tissues, but frequently observed in ESCC. Interaction between Nrf2 and Keap1 in normal mucosae is negatively correlated, while in tumors there is no negative correlation, indicating that there is little to no interaction between Nrf2 and Keap1 in ESCC. Positive Nrf2 expression in the nucleus was of diagnostic value for predicting ESCC from normal esophageal mucosae, and was significantly associated with poorer clinical response and poor progression-free survival after CRT. The value of Keap1 expression for diagnosis and predicting CRT outcomes was marginal. These different influences of Keap1 and Nrf2 on ESCC indicated that the signaling of this pathway was disturbed and displayed a Keap1-independent pattern. CONCLUSION Aberrant signaling via the Keap1-Nrf2 pathway was common in ESCC and was associated with response and survival after CRT.
Collapse
Affiliation(s)
- Jingze Zhang
- Department of Oncology, Renmin Hospital of Wuhan University, Wuhan, China.,Department of Radiation Oncology, Shandong Cancer Hospital affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan, China
| | - Qinghua Jiao
- Department of Radiation Oncology, Cancer Center, The Second Hospital of Shandong University, Jinan, China
| | - Li Kong
- Department of Radiation Oncology, Shandong Cancer Hospital affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan, China
| | - Jing Yu
- Department of Pathology, Shandong Jiaotong Hospital, Jinan, China
| | - Aiju Fang
- Department of Pathology, Shandong Jiaotong Hospital, Jinan, China
| | - Minghuan Li
- Department of Radiation Oncology, Shandong Cancer Hospital affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan, China
| | - Jinming Yu
- Department of Oncology, Renmin Hospital of Wuhan University, Wuhan, China.,Department of Radiation Oncology, Shandong Cancer Hospital affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan, China
| |
Collapse
|
32
|
Chandrasekhar Y, Phani Kumar G, Ramya EM, Anilakumar KR. Gallic Acid Protects 6-OHDA Induced Neurotoxicity by Attenuating Oxidative Stress in Human Dopaminergic Cell Line. Neurochem Res 2018; 43:1150-1160. [PMID: 29671234 DOI: 10.1007/s11064-018-2530-y] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 04/04/2018] [Accepted: 04/12/2018] [Indexed: 11/30/2022]
Abstract
Gallic acid is one of the most important polyphenolic compounds, which is considered an excellent free radical scavenger. 6-Hydroxydopamine (6-OHDA) is a neurotoxin, which has been implicated in mainly Parkinson's disease (PD). In this study, we investigated the molecular mechanism of the neuroprotective effects of gallic acid on 6-OHDA induced apoptosis in human dopaminergic cells, SH-SY5Y. Our results showed that 6-OHDA induced cytotoxicity in SH-SY5Y cells was suppressed by pre-treatment with gallic acid. The percentage of live cells (90%) was high in the pre-treatment of gallic acid when compared with 6-OHDA alone treated cell line. Moreover, gallic acid was very effective in attenuating the disruption of mitochondrial membrane potential, elevated levels of intracellular ROS and apoptotic cell death induced by 6-OHDA. Gallic acid also lowered the ratio of the pro-apoptotic Bax protein and the anti-apoptotic Bcl-2 protein in SH-SY5Y cells. 6-OHDA exposure was up-regulated caspase-3 and Keap-1 and, down-regulated Nrf2, BDNF and p-CREB, which were sufficiently reverted by gallic acid pre-treatment. These findings indicate that gallic acid is able to protect the neuronal cells against 6-OHDA induced injury and proved that gallic acid might potentially serve as an agent for prevention of several human neurodegenerative diseases caused by oxidative stress and apoptosis.
Collapse
Affiliation(s)
- Y Chandrasekhar
- Defence Food Research Laboratory, Nutritional Biochemistry and Toxicology Division, Siddhartha Nagar, Mysore, 570011, India
| | - G Phani Kumar
- Defence Food Research Laboratory, Nutritional Biochemistry and Toxicology Division, Siddhartha Nagar, Mysore, 570011, India.
| | - E M Ramya
- Defence Food Research Laboratory, Nutritional Biochemistry and Toxicology Division, Siddhartha Nagar, Mysore, 570011, India
| | - K R Anilakumar
- Defence Food Research Laboratory, Nutritional Biochemistry and Toxicology Division, Siddhartha Nagar, Mysore, 570011, India
| |
Collapse
|
33
|
Sabouny R, Fraunberger E, Geoffrion M, Ng ACH, Baird SD, Screaton RA, Milne R, McBride HM, Shutt TE. The Keap1-Nrf2 Stress Response Pathway Promotes Mitochondrial Hyperfusion Through Degradation of the Mitochondrial Fission Protein Drp1. Antioxid Redox Signal 2017; 27:1447-1459. [PMID: 28494652 DOI: 10.1089/ars.2016.6855] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AIMS Mitochondrial function is coupled to metabolic and survival pathways through both direct signaling cascades and dynamic changes in mitochondrial morphology. For example, a hyperfused mitochondrial reticulum is activated upon cellular stress and is protective against cell death. As part of a genome-wide small inhibitory ribonucleic acid screen, we identified the central redox regulator, Keap1, as a novel regulator of mitochondrial morphology. Here, we aimed to determine the mechanism through which redox signaling and Keap1 mediate changes in mitochondrial morphology. RESULTS We found that the Nrf2 transcription factor is required for mitochondrial hyperfusion induced by knockdown of Keap1. Nrf2, which is negatively regulated by Keap1, mediates the cell's response to stress by controlling the expression of several hundred genes, including proteasome expression. We next showed that increased proteasome activity, a result of increased Nrf2 activity, is responsible for the degradation of the mitochondrial fission protein Drp1, which occurs in an ubiquitin-independent manner. INNOVATION Our study described a novel pathway by which Nrf2 activation, known to occur in response to increased oxidative stress, decreases mitochondrial fission and contributes to a hyperfused mitochondrial network. CONCLUSION This study has identified the Keap1-Nrf2 nexus and modulation of proteasomal activity as novel avenues to inhibit mitochondrial fission. These findings are important, because inhibiting mitochondrial fission is a promising therapeutic approach to restore the balance between fission and fusion, which is attractive for an increasing number of disorders linked to mitochondrial dysfunction. Antioxid. Redox Signal. 27, 1447-1459.
Collapse
Affiliation(s)
- Rasha Sabouny
- 1 Department of Biochemistry and Molecular Biology, University of Calgary , Calgary, Canada
| | - Erik Fraunberger
- 2 Department of Neuroscience, University of Calgary , Calgary, Canada
| | - Michèle Geoffrion
- 3 Department of Atherosclerosis, Genetics and Cell Biology, University of Ottawa Heart Institute , Ottawa, Canada
| | - Andy Cheuk-Him Ng
- 4 Department of Cellular and Molecular Medicine, University of Ottawa , Ottawa, Canada
| | - Stephen D Baird
- 5 Children's Hospital of Eastern Ontario Research Institute , Ottawa, Canada
| | - Robert A Screaton
- 6 Department of Biochemistry, Sunnybrook Research Institute , Toronto, Canada
| | - Ross Milne
- 7 Department of Pathology and Laboratory Medicine, University of Ottawa Heart Institute , Ottawa, Canada
| | - Heidi M McBride
- 8 Department of Neurology and Neurosurgery, Montreal Neurological Institute , Montreal, Canada
| | - Timothy E Shutt
- 1 Department of Biochemistry and Molecular Biology, University of Calgary , Calgary, Canada .,9 Department of Medical Genetics, University of Calgary , Calgary, Canada
| |
Collapse
|
34
|
Liu X, Sun C, Liu B, Jin X, Li P, Zheng X, Zhao T, Li F, Li Q. Genistein mediates the selective radiosensitizing effect in NSCLC A549 cells via inhibiting methylation of the keap1 gene promoter region. Oncotarget 2017; 7:27267-79. [PMID: 27029077 PMCID: PMC5053648 DOI: 10.18632/oncotarget.8403] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2015] [Accepted: 03/14/2016] [Indexed: 01/11/2023] Open
Abstract
Non-small cell lung cancer (NSCLC) cells often possess a hypermethylated Keap1 promoter, which decreases Keap1 mRNA and protein expression levels, thus impairing the Nrf2-Keap1 pathway and thereby leading to chemo- or radio-resistance. In this study, we showed that genistein selectively exhibited a radiosensitizing effect on NSCLC A549 cells but not on normal lung fibroblast MRC-5 cells. Genistein caused oxidative stress in A549 cells rather than MRC-5 cells, as determined by the oxidation of the ROS-sensitive probe DCFH-DA and oxidative damage marked by MDA, PCO or 8-OHdG content. In A549 instead of MRC-5 cells, genistein reduced the level of methylation in the Keap1 promoter region, leading to an increased mRNA expression, thus effectively inhibited the transcription of Nrf2 to the nucleus, which suppressed the Nrf2-dependent antioxidant and resulted in the upregulation of ROS. Importantly, when combined with radiation, genistein further increased the ROS levels in A549 cells whereas decreasing the radiation-induced oxidative stress in MRC-5 cells, possibly via increasing the expression levels of Nrf2, GSH and HO-1. Moreover, radiation combined with genistein significantly increased cell apoptosis in A549 but not MRC-5 cells. Together, the results herein show that the intrinsic difference in the redox status of A549 and MRC-5 cells could be the target for genistein to selectively sensitize A549 cells to radiation, thereby leading to an increase in radiosensitivity for A549 cells.
Collapse
Affiliation(s)
- Xiongxiong Liu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.,Key Laboratory of Heavy Ion Radiation Biology and Medicine, Chinese Academy of Sciences, Lanzhou 730000, China.,Key Laboratory of Basic Research on Heavy Ion Radiation Application in Medicine, Gansu Province, Lanzhou 730000, China
| | - Chao Sun
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.,Key Laboratory of Heavy Ion Radiation Biology and Medicine, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Bingtao Liu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.,Key Laboratory of Heavy Ion Radiation Biology and Medicine, Chinese Academy of Sciences, Lanzhou 730000, China.,Key Laboratory of Basic Research on Heavy Ion Radiation Application in Medicine, Gansu Province, Lanzhou 730000, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaodong Jin
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.,Key Laboratory of Heavy Ion Radiation Biology and Medicine, Chinese Academy of Sciences, Lanzhou 730000, China.,Key Laboratory of Basic Research on Heavy Ion Radiation Application in Medicine, Gansu Province, Lanzhou 730000, China
| | - Ping Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.,Key Laboratory of Heavy Ion Radiation Biology and Medicine, Chinese Academy of Sciences, Lanzhou 730000, China.,Key Laboratory of Basic Research on Heavy Ion Radiation Application in Medicine, Gansu Province, Lanzhou 730000, China
| | - Xiaogang Zheng
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.,Key Laboratory of Heavy Ion Radiation Biology and Medicine, Chinese Academy of Sciences, Lanzhou 730000, China.,Key Laboratory of Basic Research on Heavy Ion Radiation Application in Medicine, Gansu Province, Lanzhou 730000, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ting Zhao
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.,Key Laboratory of Heavy Ion Radiation Biology and Medicine, Chinese Academy of Sciences, Lanzhou 730000, China.,Key Laboratory of Basic Research on Heavy Ion Radiation Application in Medicine, Gansu Province, Lanzhou 730000, China
| | - Feifei Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.,Key Laboratory of Heavy Ion Radiation Biology and Medicine, Chinese Academy of Sciences, Lanzhou 730000, China.,Key Laboratory of Basic Research on Heavy Ion Radiation Application in Medicine, Gansu Province, Lanzhou 730000, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qiang Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.,Key Laboratory of Heavy Ion Radiation Biology and Medicine, Chinese Academy of Sciences, Lanzhou 730000, China.,Key Laboratory of Basic Research on Heavy Ion Radiation Application in Medicine, Gansu Province, Lanzhou 730000, China
| |
Collapse
|
35
|
Tan SWS, Yip GW, Suda T, Baeg GH. Small Maf functions in the maintenance of germline stem cells in the Drosophila testis. Redox Biol 2017; 15:125-134. [PMID: 29245136 PMCID: PMC5730423 DOI: 10.1016/j.redox.2017.12.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 12/05/2017] [Indexed: 02/06/2023] Open
Abstract
Reactive oxygen species (ROS) are byproducts generated during normal cellular metabolism, and redox states have been shown to influence stem cell self-renewal and lineage commitment across phyla. However, the downstream effectors of ROS signaling that control stem cell behavior remain largely unexplored. Here, we used the Drosophila testis as an in vivo model to identify ROS-induced effectors that are involved in the differentiation process of germline stem cells (GSCs). In the Affymetrix microarray analysis, 152 genes were either upregulated or downregulated during GSC differentiation induced by elevated levels of ROS, and a follow-up validation of the gene expression by qRT-PCR showed a Spearman's rho of 0.9173 (P<0.0001). Notably, 47 (31%) of the identified genes had no predicted molecular function or recognizable protein domain. These suggest the robustness of this microarray analysis, which identified many uncharacterized genes, possibly with an essential role in ROS-induced GSC differentiation. We also showed that maf-S is transcriptionally downregulated by oxidative stress, and that maf-S knockdown promotes GSC differentiation but Maf-S overexpression conversely results in an over-growth of GSC-like cells by promoting the mitotic activity of germ cell lineage. Together with the facts that Maf-S regulates ROS levels and genetically interacts with Keap1/Nrf2 in GSC maintenance, our study suggests that Maf-S plays an important role in the Drosophila testis GSC maintenance by participating in the regulation of redox homeostasis.
Collapse
Affiliation(s)
- Sharon Wui Sing Tan
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, MD10, 4 Medical Drive, Singapore 117594, Singapore
| | - George W Yip
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, MD10, 4 Medical Drive, Singapore 117594, Singapore
| | - Toshio Suda
- Cancer Science Institute of Singapore, National University of Singapore, MD6, 14 Medical Drive, Singapore 117599, Singapore
| | - Gyeong Hun Baeg
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, MD10, 4 Medical Drive, Singapore 117594, Singapore.
| |
Collapse
|
36
|
Liu Q, Hu Y, Cao Y, Song G, Liu Z, Liu X. Chicoric Acid Ameliorates Lipopolysaccharide-Induced Oxidative Stress via Promoting the Keap1/Nrf2 Transcriptional Signaling Pathway in BV-2 Microglial Cells and Mouse Brain. J Agric Food Chem 2017; 65:338-347. [PMID: 28002939 DOI: 10.1021/acs.jafc.6b04873] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
As a major nutraceutical component of a typical Mediterranean vegetable chicory, chicoric acid (CA) has been well-documented due to its excellent antioxidant and antiobesity bioactivities. In the current study, the effects of CA on lipopolysaccharide (LPS)-stimulated oxidative stress in BV-2 microglia and C57BL/6J mice and the underlying molecular mechanisms were investigated. Results demonstrated that CA significantly reversed LPS-elicited cell viability decrease, mitochondrial dysfunction, activation of NFκB and MAPK stress pathways, and inflammation responses via balancing cellular redox status. Furthermore, molecular modeling study demonstrated that CA could insert into the pocket of Keap1 and up-regulated Nrf2 signaling and, thus, transcriptionally regulate downstream expressions of antioxidant enzymes including HO-1 and NQO-1 in both microglial cells and ip injection of LPS-treated mouse brain. These results suggested that CA attenuated LPS-induced oxidative stress via mediating Keap1/Nrf2 transcriptional pathways and downstream enzyme expressions, which indicated that CA has great potential as a nutritional preventive strategy in oxidative stress-related neuroinflammation.
Collapse
Affiliation(s)
- Qian Liu
- Laboratory of Functional Chemistry and Nutrition of Food, College of Food Science and Engineering, Northwest A&F University , Yangling, China
| | - Yaya Hu
- Laboratory of Functional Chemistry and Nutrition of Food, College of Food Science and Engineering, Northwest A&F University , Yangling, China
| | - Youfang Cao
- Laboratory of Functional Chemistry and Nutrition of Food, College of Food Science and Engineering, Northwest A&F University , Yangling, China
| | - Ge Song
- Laboratory of Functional Chemistry and Nutrition of Food, College of Food Science and Engineering, Northwest A&F University , Yangling, China
| | - Zhigang Liu
- Laboratory of Functional Chemistry and Nutrition of Food, College of Food Science and Engineering, Northwest A&F University , Yangling, China
| | - Xuebo Liu
- Laboratory of Functional Chemistry and Nutrition of Food, College of Food Science and Engineering, Northwest A&F University , Yangling, China
| |
Collapse
|
37
|
Ghorab MM, Alsaid MS, Higgins M, Dinkova-Kostova AT, Shahat AA, Elghazawy NH, Arafa RK. Synthesis, molecular modeling and NAD(P)H:quinone oxidoreductase 1 inducer activity of novel 2-phenylquinazolin-4-amine derivatives. J Enzyme Inhib Med Chem 2016; 31:1612-8. [PMID: 27052554 DOI: 10.3109/14756366.2016.1158714] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2016] [Revised: 02/19/2016] [Accepted: 02/21/2016] [Indexed: 01/10/2023] Open
Abstract
Reactive oxygen species (ROS) play an integral role in the pathogenesis of most diseases. This work presents the design and synthesis of novel 2-phenylquinazolin-4-amine derivatives (2-12) and evaluation of their NAD(P)H quinone oxidoreductase 1 (NQO1) inducer activity in murine cells. Also, molecular docking of all the new compounds was performed to assess their ability to inhibit Keap1-Nrf2 protein-protein interaction through occupying the Keap1-Nrf2-binding domain which biologically leads to a consequent Nrf2 accumulation and enhanced gene expression of NQO1. Docking results showed that all compounds have the ability to interact with Keap1; however compound 7, the most active compound in this study, showed more interactions with key amino acids.
Collapse
Affiliation(s)
- Mostafa M Ghorab
- a Department of Pharmacognosy , College of Pharmacy, King Saud University , Riyadh , Kingdom of Saudi Arabia
- b Department of Drug Radiation Research , National Center for Radiation Research & Technology, Atomic Energy Authority , Nasr City , Egypt
| | - Mansour S Alsaid
- a Department of Pharmacognosy , College of Pharmacy, King Saud University , Riyadh , Kingdom of Saudi Arabia
| | - Maureen Higgins
- c Jacqui Wood Cancer Centre, Division of Cancer Research, Medical Research Institute, University of Dundee , Dundee , UK
| | - Albena T Dinkova-Kostova
- c Jacqui Wood Cancer Centre, Division of Cancer Research, Medical Research Institute, University of Dundee , Dundee , UK
- d Departments of Medicine and Pharmacology and Molecular Sciences , Johns Hopkins University School of Medicine , Baltimore , MD , USA
| | - Abdelaaty A Shahat
- a Department of Pharmacognosy , College of Pharmacy, King Saud University , Riyadh , Kingdom of Saudi Arabia
- e Phytochemistry Department , National Research Center , Cairo , Egypt
| | | | - Reem K Arafa
- f Zewail City of Science and Technology , Cairo , Egypt , and
- g Department of Pharmaceutical Chemistry , Faculty of Pharmacy, Cairo University , Cairo , Egypt
| |
Collapse
|
38
|
Mussotter F, Tomm JM, El Ali Z, Pallardy M, Kerdine-Römer S, Götz M, von Bergen M, Haase A, Luch A. Proteomics analysis of dendritic cell activation by contact allergens reveals possible biomarkers regulated by Nrf2. Toxicol Appl Pharmacol 2016; 313:170-9. [PMID: 27816475 DOI: 10.1016/j.taap.2016.11.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 10/28/2016] [Accepted: 11/01/2016] [Indexed: 12/17/2022]
Abstract
Allergic contact dermatitis is a widespread disease with high clinical relevance affecting approximately 20% of the general population. Typically, contact allergens are low molecular weight electrophilic compounds which can activate the Keap1/Nrf2 pathway. We performed a proteomics study to reveal possible biomarkers for dendritic cell (DC) activation by contact allergens and to further elucidate the role of Keap1/Nrf2 signaling in this process. We used bone marrow derived dendritic cells (BMDCs) of wild-type (nrf2+/+) and Nrf2 knockout (nrf2-/-) mice and studied their response against the model contact sensitizers 2,4-dinitrochlorobenzene (DNCB), cinnamaldehyde (CA) and nickel(II) sulfate by 2-dimensional polyacrylamide gel electrophoresis (2D-PAGE) in combination with electrospray ionization tandem mass spectrometry (ESI-MS/MS). Sodium dodecyl sulfate (SDS, 100μM) served as irritant control. While treatment with nickel(II) sulfate and SDS had only little effects, CA and DNCB led to significant changes in protein expression. We found 18 and 30 protein spots up-regulated in wild-type cells treated with 50 and 100μM CA, respectively. For 5 and 10μM DNCB, 32 and 37 spots were up-regulated, respectively. Almost all of these proteins were not differentially expressed in nrf2-/- BMDCs, indicating an Nrf2-dependent regulation. Among them proteins were detected which are involved in oxidative stress and heat shock responses, as well as in signal transduction or basic cellular pathways. The applied approach allowed us to differentiate between Nrf2-dependent and Nrf2-independent cellular biomarkers differentially regulated upon allergen-induced DC activation. The data presented might contribute to the further development of suitable in vitro testing methods for chemical-mediated sensitization.
Collapse
|
39
|
Ghorab MM, Alsaid MS, Higgins M, Dinkova-Kostova AT, Shahat AA, Elghazawy NH, Arafa RK. NAD(P)H:quinone oxidoreductase 1 inducer activity of some novel anilinoquinazoline derivatives. Drug Des Devel Ther 2016; 10:2515-24. [PMID: 27540279 PMCID: PMC4982500 DOI: 10.2147/dddt.s105423] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The Kelch-like ECH-associated protein 1 (Keap1)/nuclear factor erythroid 2-related factor 2 (Nrf2)/antioxidant response elements pathway enables cells to survive oxidative stress conditions through regulating the expression of cytoprotective enzymes such as NAD(P)H quinone oxidoreductase 1 (NQO1). This work presents the design and synthesis of novel anilinoquinazoline derivatives (2-16a) and evaluation of their NQO1 inducer activity in murine cells. Molecular docking of the new compounds was performed to assess their ability to inhibit Keap1-Nrf2 protein-protein interaction through occupying the Keap1-Nrf2-binding domain, which leads to Nrf2 accumulation and enhanced gene expression of NQO1. Docking results showed that all compounds can potentially interact with Keap1; however, 1,5-dimethyl-2-phenyl-4-(2-phenylquinazolin-4-ylamino)-1,2-dihydropyrazol-3-one (9), the most potent inducer, showed the largest number of interactions with key amino acids in the binding pocket (Arg483, Tyr525, and Phe478) compared to the native ligand or any other compound in this series.
Collapse
Affiliation(s)
- Mostafa M Ghorab
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Kingdom of Saudi Arabia
- Department of Drug Radiation Research, National Center for Radiation Research & Technology, Atomic Energy Authority, Cairo, Egypt
| | - Mansour S Alsaid
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Maureen Higgins
- Jacqui Wood Cancer Centre, Division of Cancer Research, Medical Research Institute, University of Dundee, Dundee, UK
| | - Albena T Dinkova-Kostova
- Jacqui Wood Cancer Centre, Division of Cancer Research, Medical Research Institute, University of Dundee, Dundee, UK
- Department of Medicine
- Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Abdelaaty A Shahat
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Kingdom of Saudi Arabia
- Phytochemistry Department, National Research Center, Dokki, Giza
| | | | - Reem K Arafa
- Zewail City of Science and Technology
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| |
Collapse
|
40
|
Hayashi K, Dan K, Goto F, Tshuchihashi N, Nomura Y, Fujioka M, Kanzaki S, Ogawa K. The autophagy pathway maintained signaling crosstalk with the Keap1-Nrf2 system through p62 in auditory cells under oxidative stress. Cell Signal 2015; 27:382-93. [PMID: 25435427 DOI: 10.1016/j.cellsig.2014.11.024] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2014] [Revised: 11/04/2014] [Accepted: 11/19/2014] [Indexed: 12/28/2022]
Abstract
The main purposes of our study were to consider the effect of autophagy on auditory cells under oxidative stress, and the function of possible crosstalk among p62, Keap1 and Nrf2 in autophagy-deficient auditory cells. First, we described how cell death was induced in auditory cell line (HEI-OC1) exposed to H2O2. We found that the decision for the cell death of auditory cells under oxidative stress depends on the balance between autophagy and necrosis due to ATP depletion, and autophagy plays a cytoprotective function in oxidative stress-induced necrosis. Our data clearly suggested that autophagy was a cell survival mechanism in H2O2-induced cell death, based on the observation that suppression of autophagy by knockdown of Atg7 sensitized, whereas activation of autophagy by rapamycin protected against H2O2-induced cell death. Next, our results regarding the relationship among p62, Nrf2 and Keap1 by siRNA paradoxically showed that p62 creates a positive feedback loop in the Keap1/Nrf2 pathway. Autophagy impaired by Atg7 knockdown degrades Keap1 in a p62-dependent manner, whereas Nrf2 is activated. As a result, the cell death induced by H2O2 was promoted in auditory cells. Taken together, these results suggested that the autophagy pathway maintained signaling crosstalk with the Keap1-Nrf2 system through p62 in auditory cells under oxidative stress.
Collapse
Affiliation(s)
- Ken Hayashi
- Department of Otolaryngology, Kamio Memorial Hospital, Tokyo 101-0063, Japan; Department of Otolaryngology, School of Medicine, Keio University, Tokyo 160-8582, Japan.
| | - Katsuaki Dan
- Collaborative Research Resources, Core Instrumentation Facility, Keio University, Tokyo 160-8582, Japan.
| | - Fumiyuki Goto
- Department of Otolaryngology, School of Medicine, Keio University, Tokyo 160-8582, Japan.
| | - Nana Tshuchihashi
- Department of Otolaryngology, School of Medicine, Keio University, Tokyo 160-8582, Japan; Department of Otolaryngology, School of Medicine, Kyushu University, Fukuoka 812-8582, Japan.
| | - Yasuyuki Nomura
- Department of Otolaryngology, School of Medicine, Nihon University, Tokyo 173-8610, Japan.
| | - Masato Fujioka
- Department of Otolaryngology, School of Medicine, Keio University, Tokyo 160-8582, Japan.
| | - Sho Kanzaki
- Department of Otolaryngology, School of Medicine, Keio University, Tokyo 160-8582, Japan.
| | - Kaoru Ogawa
- Department of Otolaryngology, School of Medicine, Keio University, Tokyo 160-8582, Japan.
| |
Collapse
|
41
|
Abiko Y, Mizokawa M, Kumagai Y. Activation of the Kelch-like ECH-associated protein 1 (Keap1)/NF-E2-related factor 2 (Nrf2) pathway through covalent modification of the 2-alkenal group of aliphatic electrophiles in Coriandrum sativum L. J Agric Food Chem 2014; 62:10936-10944. [PMID: 25307732 DOI: 10.1021/jf5030592] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Phytochemicals able to activate the transcription factor NF-E2-related factor 2 (Nrf2) were isolated from an extract of Coriandrum sativum L. (C. sativum) leaves by preparative octadecyl silica column chromatography. Ultraperformance liquid chromatography and liquid chromatography-tandem mass spectrometry analysis of the isolated components after derivatization with 2-diphenylacetyl-1,3-inandione-1-hydrazone and experiments with HepG2 cells revealed that (E)-2-alkenals with different carbon numbers play a role in Nrf2 activation in these cells. Such Nrf2 activation appears to be attributable to S-alkylation of Kelch-like ECH-associated protein 1 (Keap1), the negative regulator for Nrf2, as determined by a biotin-PEAC5-maleimide assay. Interestingly, (E)-2-butenal caused Keap1 modification and Nrf2 activation, whereas butanal did not. These results suggest that (E)-2-alkenals with an α,β-unsaturated aldehyde moiety, which is a common substituent in phytochemicals isolated from C. sativum leaves, activate the Keap1/Nrf2 pathway associated with cellular protection.
Collapse
Affiliation(s)
- Yumi Abiko
- Faculty of Medicine and ‡Masters Program in Environmental Sciences, Graduate School of Environmental Sciences, University of Tsukuba , 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
| | | | | |
Collapse
|
42
|
Forman HJ, Davies KJA, Ursini F. How do nutritional antioxidants really work: nucleophilic tone and para-hormesis versus free radical scavenging in vivo. Free Radic Biol Med 2014; 66:24-35. [PMID: 23747930 PMCID: PMC3852196 DOI: 10.1016/j.freeradbiomed.2013.05.045] [Citation(s) in RCA: 476] [Impact Index Per Article: 47.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Revised: 05/29/2013] [Accepted: 05/30/2013] [Indexed: 02/07/2023]
Abstract
We present arguments for an evolution in our understanding of how antioxidants in fruits and vegetables exert their health-protective effects. There is much epidemiological evidence for disease prevention by dietary antioxidants and chemical evidence that such compounds react in one-electron reactions with free radicals in vitro. Nonetheless, kinetic constraints indicate that in vivo scavenging of radicals is ineffective in antioxidant defense. Instead, enzymatic removal of nonradical electrophiles, such as hydroperoxides, in two-electron redox reactions is the major antioxidant mechanism. Furthermore, we propose that a major mechanism of action for nutritional antioxidants is the paradoxical oxidative activation of the Nrf2 (NF-E2-related factor 2) signaling pathway, which maintains protective oxidoreductases and their nucleophilic substrates. This maintenance of "nucleophilic tone," by a mechanism that can be called "para-hormesis," provides a means for regulating physiological nontoxic concentrations of the nonradical oxidant electrophiles that boost antioxidant enzymes, and damage removal and repair systems (for proteins, lipids, and DNA), at the optimal levels consistent with good health.
Collapse
Affiliation(s)
- Henry J Forman
- University of California, Merced, 5200 North Lake Road, Merced, CA 95343, USA; Andrus Gerontology Center of the Davis School of Gerontology, University of Southern, California, 3715 McClintock Avenue, Los Angeles, CA 90089-0191, USA
| | - Kelvin J A Davies
- Andrus Gerontology Center of the Davis School of Gerontology, University of Southern, California, 3715 McClintock Avenue, Los Angeles, CA 90089-0191, USA; Division of Molecular & Computational Biology, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, University of Southern California, 3715 McClintock Avenue, Los Angeles, CA 90089-0191, USA
| | - Fulvio Ursini
- Department of Molecular Medicine, University of Padova, Viale G. Colombo 3, I-35121, Padova, Italy.
| |
Collapse
|