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Chakraborty S, Mishra A, Choudhuri A, Bhaumik T, Sengupta R. Leveraging the redundancy of S-denitrosylases in response to S-nitrosylation of caspases: Experimental strategies and beyond. Nitric Oxide 2024; 149:18-31. [PMID: 38823434 DOI: 10.1016/j.niox.2024.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Accepted: 05/25/2024] [Indexed: 06/03/2024]
Abstract
Redox-based protein posttranslational modifications, such as S-nitrosylation of critical, active site cysteine thiols have garnered significant clinical attention and research interest, reasoning for one of the crucial biological implications of reactive messenger molecule, nitric oxide in the cellular repertoire. The stringency of the S-(de)nitrosylation-based redox switch governs the activity and contribution of several susceptible enzymes in signal transduction processes and diverse pathophysiological settings, thus establishing it as a transient yet reasonable, and regulated mechanism of NO adduction and release. Notably, endogenous proteases like cytosolic and mitochondrial caspases with a molecular weight ranging from 33 to 55 kDa are susceptible to performing this biochemistry in the presence of major oxidoreductases, which further unveils the enormous redox-mediated regulational control of caspases in the etiology of diseases. In addition to advancing the progress of the current state of understanding of 'redox biochemistry' in the field of medicine and enriching the existing dynamic S-nitrosoproteome, this review stands as a testament to an unprecedented shift in the underpinnings for redundancy and redox relay between the major redoxin/antioxidant systems, fine-tuning of which can command the apoptotic control of caspases at the face of nitro-oxidative stress. These intricate functional overlaps and cellular backups, supported rationally by kinetically favorable reaction mechanisms suggest the physiological relevance of identifying and involving such cognate substrates for cellular S-denitrosylases that can shed light on the bigger picture of extensively proposing targeted therapies and redox-based drug designing to potentially alleviate the side effects of NOx/ROS in disease pathogenesis.
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Affiliation(s)
- Surupa Chakraborty
- Amity Institute of Biotechnology Kolkata, Amity University Kolkata, Action Area II, Rajarhat, Newtown, Kolkata, West Bengal, 700135, India
| | - Akansha Mishra
- Amity Institute of Biotechnology Kolkata, Amity University Kolkata, Action Area II, Rajarhat, Newtown, Kolkata, West Bengal, 700135, India
| | - Ankita Choudhuri
- Amity Institute of Biotechnology Kolkata, Amity University Kolkata, Action Area II, Rajarhat, Newtown, Kolkata, West Bengal, 700135, India
| | - Tamal Bhaumik
- Amity Institute of Biotechnology Kolkata, Amity University Kolkata, Action Area II, Rajarhat, Newtown, Kolkata, West Bengal, 700135, India
| | - Rajib Sengupta
- Amity Institute of Biotechnology Kolkata, Amity University Kolkata, Action Area II, Rajarhat, Newtown, Kolkata, West Bengal, 700135, India.
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Chai Z, Zheng J, Shen J. Mechanism of ferroptosis regulating ischemic stroke and pharmacologically inhibiting ferroptosis in treatment of ischemic stroke. CNS Neurosci Ther 2024; 30:e14865. [PMID: 39042604 PMCID: PMC11265528 DOI: 10.1111/cns.14865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 06/27/2024] [Accepted: 07/05/2024] [Indexed: 07/25/2024] Open
Abstract
Ferroptosis is a newly discovered form of programmed cell death that is non-caspase-dependent and is characterized by the production of lethal levels of iron-dependent lipid reactive oxygen species (ROS). In recent years, ferroptosis has attracted great interest in the field of cerebral infarction because it differs morphologically, physiologically, and genetically from other forms of cell death such as necrosis, apoptosis, autophagy, and pyroptosis. In addition, ROS is considered to be an important prognostic factor for ischemic stroke, making it a promising target for stroke treatment. This paper summarizes the induction and defense mechanisms associated with ferroptosis, and explores potential treatment strategies for ischemic stroke in order to lay the groundwork for the development of new neuroprotective drugs.
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Affiliation(s)
- Zhaohui Chai
- Department of NeurosurgeryFirst Affiliated Hospital, College of Medicine, Zhejiang UniversityHangzhou CityChina
| | - Jiesheng Zheng
- Department of NeurosurgeryFirst Affiliated Hospital, College of Medicine, Zhejiang UniversityHangzhou CityChina
| | - Jian Shen
- Department of NeurosurgeryFirst Affiliated Hospital, College of Medicine, Zhejiang UniversityHangzhou CityChina
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3
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Li L, Chen D, Lin X, Luo J, Tan J, Ding D, Li P. Antioxidative Stress-Induced Destruction to Cochlear Cells Caused by Blind Antioxidant Therapy. Otolaryngol Head Neck Surg 2024; 170:1421-1429. [PMID: 38314899 DOI: 10.1002/ohn.659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 11/21/2023] [Accepted: 01/06/2024] [Indexed: 02/07/2024]
Abstract
OBJECTIVE Verification that blind and excessive use of antioxidants leads to antioxidant stress which exacerbates cochlear cell damage. STUDY DESIGN Basic research. SETTING The Third Affiliated Hospital of Sun Yat-Sen University. METHODS We compared and quantified hair cell-like house ear institute-organ of corti 1 (HEI-OC1) cell density, cell viability, and apoptosis caused by different concentrations of N-acetylcysteine (NAC) via Hoechst staining, Cell Counting Kit 8, Hoechst with propidium iodide staining, and Annexin V with propidium iodide (PI) staining. Apoptosis induced by high concentrations of M40403 and coenzyme Q10 in cochlear explants was analyzed and compared by cochlear dissection and activated caspase 3 labeling. RESULTS With the increase of NAC concentration (0-1000 μmol/L), cell density decreased consequently and reached the lowest at 1000 μmol/L (****P ≤ .0001). Cell viability is also declining (**P < .01). The number of Annexin V-fluorescein isothiocyanate-labeled cells and PI-labeled cells increased with increasing NAC concentration after treatment of HEI-OC1 cells for 48 hours. The proportion of apoptotic cells also rose (*P < .05, **P < .01). Cochlear hair cells (HCs) treated with low concentrations of M40403 and coenzyme Q10 for 48 hours showed no damage. When the concentrations of M40403 and coenzyme Q10 were increased (concentrations>30 μmol/L), HC damage began, followed by a dose-dependent increase in HC loss (*P < .001, **P < .0001). Activated caspase-3 was clearly apparent in cochlear explants treated with 50 μmol/L M40403 and coenzyme Q10 compared with cochlear explants without added M40403 and coenzyme Q10. CONCLUSION These experimental results suggest that inappropriate application of antioxidants can cause severe damage to normal cochlear HCs.
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Affiliation(s)
- Liling Li
- Department of Otolaryngology-Head and Neck Surgery, The Third Affiliated Hospital of Sun Yat-Sen University, Guang Zhou, Guangdong, China
| | - Dan Chen
- Department of Otolaryngology-Head and Neck Surgery, The Third Affiliated Hospital of Sun Yat-Sen University, Guang Zhou, Guangdong, China
| | - Xuexin Lin
- Department of Otolaryngology-Head and Neck Surgery, The Third Affiliated Hospital of Sun Yat-Sen University, Guang Zhou, Guangdong, China
| | - Jia Luo
- Department of Otolaryngology-Head and Neck Surgery, The Third Affiliated Hospital of Sun Yat-Sen University, Guang Zhou, Guangdong, China
| | - Jingqian Tan
- Department of Otolaryngology-Head and Neck Surgery, The Third Affiliated Hospital of Sun Yat-Sen University, Guang Zhou, Guangdong, China
| | - Dalian Ding
- Center for Hearing and Deafness, Department of Communicative Disorders and Sciences, University at Buffalo, Buffalo, Amherst, New York, USA
| | - Peng Li
- Department of Otolaryngology-Head and Neck Surgery, The Third Affiliated Hospital of Sun Yat-Sen University, Guang Zhou, Guangdong, China
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Aragoneses-Cazorla G, Alvarez-Fernandez Garcia R, Martinez-Lopez A, Gomez Gomez M, Vallet-Regí M, Castillo-Lluva S, González B, Luque-Garcia JL. Mechanistic insights into the antitumoral potential and in vivo antiproliferative efficacy of a silver-based core@shell nanosystem. Int J Pharm 2024; 655:124023. [PMID: 38513815 DOI: 10.1016/j.ijpharm.2024.124023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 03/07/2024] [Accepted: 03/18/2024] [Indexed: 03/23/2024]
Abstract
This study delves into the biomolecular mechanisms underlying the antitumoral efficacy of a hybrid nanosystem, comprised of a silver core@shell (Ag@MSNs) functionalized with transferrin (Tf). Employing a SILAC proteomics strategy, we identified over 150 de-regulated proteins following exposure to the nanosystem. These proteins play pivotal roles in diverse cellular processes, including mitochondrial fission, calcium homeostasis, endoplasmic reticulum (ER) stress, oxidative stress response, migration, invasion, protein synthesis, RNA maturation, chemoresistance, and cellular proliferation. Rigorous validation of key findings substantiates that the nanosystem elicits its antitumoral effects by activating mitochondrial fission, leading to disruptions in calcium homeostasis, as corroborated by RT-qPCR and flow cytometry analyses. Additionally, induction of ER stress was validated through western blotting of ER stress markers. The cytotoxic action of the nanosystem was further affirmed through the generation of cytosolic and mitochondrial reactive oxygen species (ROS). Finally, in vivo experiments using a chicken embryo model not only confirmed the antitumoral capacity of the nanosystem, but also demonstrated its efficacy in reducing cellular proliferation. These comprehensive findings endorse the potential of the designed Ag@MSNs-Tf nanosystem as a groundbreaking chemotherapeutic agent, shedding light on its multifaceted mechanisms and in vivo applicability.
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Affiliation(s)
- Guillermo Aragoneses-Cazorla
- Department of Analytical Chemistry, Faculty of Chemical Sciences, Complutense University of Madrid, 28040 Madrid, Spain
| | | | - Angelica Martinez-Lopez
- Department of Biochemistry and Molecular Biology, Faculty of Chemical Sciences, Complutense University of Madrid, 28040 Madrid, Spain
| | - Milagros Gomez Gomez
- Department of Analytical Chemistry, Faculty of Chemical Sciences, Complutense University of Madrid, 28040 Madrid, Spain
| | - Maria Vallet-Regí
- Department of Chemistry in Pharmaceutical Sciences, Faculty of Pharmacy, Complutense University of Madrid, Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), 28040 Madrid, Spain; Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Spain
| | - Sonia Castillo-Lluva
- Department of Biochemistry and Molecular Biology, Faculty of Chemical Sciences, Complutense University of Madrid, 28040 Madrid, Spain
| | - Blanca González
- Department of Chemistry in Pharmaceutical Sciences, Faculty of Pharmacy, Complutense University of Madrid, Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), 28040 Madrid, Spain; Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Spain
| | - Jose L Luque-Garcia
- Department of Analytical Chemistry, Faculty of Chemical Sciences, Complutense University of Madrid, 28040 Madrid, Spain.
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Yu J, Zhang Y, Liu H, Liu Y, Mohsin A, Liu Z, Zheng Y, Xing J, Han J, Zhuang Y, Guo M, Wang Z. Temporal dynamics of stress response in Halomonas elongata to NaCl shock: physiological, metabolomic, and transcriptomic insights. Microb Cell Fact 2024; 23:88. [PMID: 38519954 PMCID: PMC10960403 DOI: 10.1186/s12934-024-02358-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Accepted: 03/06/2024] [Indexed: 03/25/2024] Open
Abstract
BACKGROUND The halophilic bacterium Halomonas elongata is an industrially important strain for ectoine production, with high value and intense research focus. While existing studies primarily delve into the adaptive mechanisms of this bacterium under fixed salt concentrations, there is a notable dearth of attention regarding its response to fluctuating saline environments. Consequently, the stress response of H. elongata to salt shock remains inadequately understood. RESULTS This study investigated the stress response mechanism of H. elongata when exposed to NaCl shock at short- and long-time scales. Results showed that NaCl shock induced two major stresses, namely osmotic stress and oxidative stress. In response to the former, within the cell's tolerable range (1-8% NaCl shock), H. elongata urgently balanced the surging osmotic pressure by uptaking sodium and potassium ions and augmenting intracellular amino acid pools, particularly glutamate and glutamine. However, ectoine content started to increase until 20 min post-shock, rapidly becoming the dominant osmoprotectant, and reaching the maximum productivity (1450 ± 99 mg/L/h). Transcriptomic data also confirmed the delayed response in ectoine biosynthesis, and we speculate that this might be attributed to an intracellular energy crisis caused by NaCl shock. In response to oxidative stress, transcription factor cysB was significantly upregulated, positively regulating the sulfur metabolism and cysteine biosynthesis. Furthermore, the upregulation of the crucial peroxidase gene (HELO_RS18165) and the simultaneous enhancement of peroxidase (POD) and catalase (CAT) activities collectively constitute the antioxidant defense in H. elongata following shock. When exceeding the tolerance threshold of H. elongata (1-13% NaCl shock), the sustained compromised energy status, resulting from the pronounced inhibition of the respiratory chain and ATP synthase, may be a crucial factor leading to the stagnation of both cell growth and ectoine biosynthesis. CONCLUSIONS This study conducted a comprehensive analysis of H. elongata's stress response to NaCl shock at multiple scales. It extends the understanding of stress response of halophilic bacteria to NaCl shock and provides promising theoretical insights to guide future improvements in optimizing industrial ectoine production.
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Affiliation(s)
- Junxiong Yu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Rd, Shanghai, 200237, China
| | - Yue Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Rd, Shanghai, 200237, China
| | - Hao Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Rd, Shanghai, 200237, China
| | - Yuxuan Liu
- Department of Chemical Engineering for Energy Resources, East China University of Science and Technology, 130 Meilong Rd, Shanghai, 200237, China
| | - Ali Mohsin
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Rd, Shanghai, 200237, China
| | - Zebo Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Rd, Shanghai, 200237, China
| | - Yanning Zheng
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, No. 1 Beichen West Road, Chaoyang District, Beijing, 100101, China
| | - Jianmin Xing
- Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, PR China
| | - Jing Han
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, No. 1 Beichen West Road, Chaoyang District, Beijing, 100101, China
| | - Yingping Zhuang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Rd, Shanghai, 200237, China
| | - Meijin Guo
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Rd, Shanghai, 200237, China.
| | - Zejian Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Rd, Shanghai, 200237, China.
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Chakraborty S, Sircar E, Bhattacharyya C, Choudhuri A, Mishra A, Dutta S, Bhatta S, Sachin K, Sengupta R. S-Denitrosylation: A Crosstalk between Glutathione and Redoxin Systems. Antioxidants (Basel) 2022; 11:1921. [PMID: 36290644 PMCID: PMC9598160 DOI: 10.3390/antiox11101921] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 09/19/2022] [Accepted: 09/20/2022] [Indexed: 08/27/2023] Open
Abstract
S-nitrosylation of proteins occurs as a consequence of the derivatization of cysteine thiols with nitric oxide (NO) and is often associated with diseases and protein malfunction. Aberrant S-nitrosylation, in addition to other genetic and epigenetic factors, has gained rapid importance as a prime cause of various metabolic, respiratory, and cardiac disorders, with a major emphasis on cancer and neurodegeneration. The S-nitrosoproteome, a term used to collectively refer to the diverse and dynamic repertoire of S-nitrosylated proteins, is relatively less explored in the field of redox biochemistry, in contrast to other covalently modified versions of the same set of proteins. Advancing research is gradually unveiling the enormous clinical importance of S-nitrosylation in the etiology of diseases and is opening up new avenues of prompt diagnosis that harness this phenomenon. Ever since the discovery of the two robust and highly conserved S-nitrosoglutathione reductase and thioredoxin systems as candidate denitrosylases, years of rampant speculation centered around the identification of specific substrates and other candidate denitrosylases, subcellular localization of both substrates and denitrosylases, the position of susceptible thiols, mechanisms of S-denitrosylation under basal and stimulus-dependent conditions, impact on protein conformation and function, and extrapolating these findings towards the understanding of diseases, aging and the development of novel therapeutic strategies. However, newer insights in the ever-expanding field of redox biology reveal distinct gaps in exploring the crucial crosstalk between the redoxins/major denitrosylase systems. Clarifying the importance of the functional overlap of the glutaredoxin, glutathione, and thioredoxin systems and examining their complementary functions as denitrosylases and antioxidant enzymatic defense systems are essential prerequisites for devising a rationale that could aid in predicting the extent of cell survival under high oxidative/nitrosative stress while taking into account the existence of the alternative and compensatory regulatory mechanisms. This review thus attempts to highlight major gaps in our understanding of the robust cellular redox regulation system, which is upheld by the concerted efforts of various denitrosylases and antioxidants.
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Affiliation(s)
- Surupa Chakraborty
- Amity Institute of Biotechnology Kolkata, Amity University Kolkata, Action Area II, Rajarhat, Newtown, Kolkata 700135, West Bengal, India
| | - Esha Sircar
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology, Roorkee 247667, Uttarakhand, India
| | - Camelia Bhattacharyya
- Amity Institute of Biotechnology Kolkata, Amity University Kolkata, Action Area II, Rajarhat, Newtown, Kolkata 700135, West Bengal, India
| | - Ankita Choudhuri
- Amity Institute of Biotechnology Kolkata, Amity University Kolkata, Action Area II, Rajarhat, Newtown, Kolkata 700135, West Bengal, India
| | - Akansha Mishra
- Amity Institute of Biotechnology Kolkata, Amity University Kolkata, Action Area II, Rajarhat, Newtown, Kolkata 700135, West Bengal, India
| | - Sreejita Dutta
- Amity Institute of Biotechnology Kolkata, Amity University Kolkata, Action Area II, Rajarhat, Newtown, Kolkata 700135, West Bengal, India
| | - Sneha Bhatta
- Amity Institute of Biotechnology Kolkata, Amity University Kolkata, Action Area II, Rajarhat, Newtown, Kolkata 700135, West Bengal, India
| | - Kumar Sachin
- Department of Biosciences, Swami Rama Himalayan University, Jolly Grant, Dehradun 248016, Uttarakhand, India
| | - Rajib Sengupta
- Amity Institute of Biotechnology Kolkata, Amity University Kolkata, Action Area II, Rajarhat, Newtown, Kolkata 700135, West Bengal, India
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7
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Comparative genomics provides insights into the aquatic adaptations of mammals. Proc Natl Acad Sci U S A 2021; 118:2106080118. [PMID: 34503999 PMCID: PMC8449357 DOI: 10.1073/pnas.2106080118] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/26/2021] [Indexed: 12/30/2022] Open
Abstract
Divergent lineages can respond to common environmental factors through convergent processes involving shared genomic components or pathways, but the molecular mechanisms are poorly understood. Here, we provide genomic resources and insights into the evolution of mammalian lineages adapting to aquatic life. Our data suggest convergent evolution, for example, in association with thermoregulation through genes associated with a surface heat barrier (NFIA) and internal heat exchange (SEMA3E). Combined with the support of previous reports showing that the UCP1 locus has been lost in many marine mammals independently, our results suggest that the thermostatic strategy of marine mammals shifted from enhancing heat production to limiting heat loss. The ancestors of marine mammals once roamed the land and independently committed to an aquatic lifestyle. These macroevolutionary transitions have intrigued scientists for centuries. Here, we generated high-quality genome assemblies of 17 marine mammals (11 cetaceans and six pinnipeds), including eight assemblies at the chromosome level. Incorporating previously published data, we reconstructed the marine mammal phylogeny and population histories and identified numerous idiosyncratic and convergent genomic variations that possibly contributed to the transition from land to water in marine mammal lineages. Genes associated with the formation of blubber (NFIA), vascular development (SEMA3E), and heat production by brown adipose tissue (UCP1) had unique changes that may contribute to marine mammal thermoregulation. We also observed many lineage-specific changes in the marine mammals, including genes associated with deep diving and navigation. Our study advances understanding of the timing, pattern, and molecular changes associated with the evolution of mammalian lineages adapting to aquatic life.
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8
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Wang ZB, Jiang SL, Liu SB, Peng JB, Hu S, Wang X, Zhuo W, Liu T, Guo JW, Zhou HH, Yang ZQ, Mao XY, Liu ZQ. Metabolomics of Artichoke Bud Extract in Spontaneously Hypertensive Rats. ACS OMEGA 2021; 6:18610-18622. [PMID: 34337201 PMCID: PMC8319930 DOI: 10.1021/acsomega.1c01135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 07/05/2021] [Indexed: 05/10/2023]
Abstract
Hypertension adversely affects the quality of life in humans across modern society. Studies have attributed increased reactive oxygen species production to the pathophysiology of hypertension. So far, a specific drug to control the disease perfectly has not been developed. However, artichoke, an edible vegetable, plays an essential role in treating many diseases due to its potent antioxidant activities. The objective of this study is to evaluate the effect of artichoke bud extract (ABE) on heart tissue metabolomics of hypertensive rats. Spontaneously hypertensive rats and Wistar-Kyoto (WKY) rats were divided into six groups, then exposed to different doses comprising ABE, Enalapril Maleate, or 1% carboxylmethyl cellulose for 4 weeks. Their blood pressures were recorded at 0, 2, 3, and 4 weeks after the start of the test period. Thereafter, all rats were anesthetized, and blood was collected from their cardiac apexes. Then, we measured the levels for 15 kinds of serum biochemical parameters. An established orthogonal partial least square-discriminant analysis model completed the metabolomic analysis. Hypertensive rats in the ABE group exhibited well-controlled blood pressure, relative to those in the model group. Specifically, artichoke significantly lowered serum levels for total protein (TP), albumin (ALB), and uric acid (UA) in the hypertensive rats. This effect involved the action of eight metabolites, including guanine, 1-methylnicotinamide, p-aminobenzoic acid, NAD, NADH, uridine 5'-monophosphate, adenosine monophosphate, and methylmalonic acid. Collectively, these findings suggest that ABE may play a role in affecting oxidative stress and purine, nicotinate, and nicotinamide metabolism.
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Affiliation(s)
- Zhi-Bin Wang
- Department
of Clinical Pharmacology, Hunan Key Laboratory of Pharmacogenetics,
and National Clinical Research Center for Geriatric Disorders, Xiangya
Hospital, Central South University, Changsha 410008, P. R. China
- Institute
of Clinical Pharmacology, Engineering Research Center for Applied
Technology of Pharmacogenomics of Ministry of Education, Central South University, Changsha 410078, P. R. China
| | - Shi-Long Jiang
- Department
of Clinical Pharmacology, Hunan Key Laboratory of Pharmacogenetics,
and National Clinical Research Center for Geriatric Disorders, Xiangya
Hospital, Central South University, Changsha 410008, P. R. China
- Institute
of Clinical Pharmacology, Engineering Research Center for Applied
Technology of Pharmacogenomics of Ministry of Education, Central South University, Changsha 410078, P. R. China
| | - Shao-Bo Liu
- Department
of Pharmacy, Xiangya Hospital, Central South
University, Changsha 410008, P. R. China
| | - Jing-Bo Peng
- Department
of Clinical Pharmacology, Hunan Key Laboratory of Pharmacogenetics,
and National Clinical Research Center for Geriatric Disorders, Xiangya
Hospital, Central South University, Changsha 410008, P. R. China
- Institute
of Clinical Pharmacology, Engineering Research Center for Applied
Technology of Pharmacogenomics of Ministry of Education, Central South University, Changsha 410078, P. R. China
| | - Shuo Hu
- Department
of Nuclear Medicine and Key Laboratory of Biological Nanotechnology
of National Health Commission, Xiangya Hospital, Central South University, Changsha 410008, P. R. China
| | - Xu Wang
- Department
of Clinical Pharmacology, Hunan Key Laboratory of Pharmacogenetics,
and National Clinical Research Center for Geriatric Disorders, Xiangya
Hospital, Central South University, Changsha 410008, P. R. China
- Institute
of Clinical Pharmacology, Engineering Research Center for Applied
Technology of Pharmacogenomics of Ministry of Education, Central South University, Changsha 410078, P. R. China
| | - Wei Zhuo
- Department
of Clinical Pharmacology, Hunan Key Laboratory of Pharmacogenetics,
and National Clinical Research Center for Geriatric Disorders, Xiangya
Hospital, Central South University, Changsha 410008, P. R. China
- Institute
of Clinical Pharmacology, Engineering Research Center for Applied
Technology of Pharmacogenomics of Ministry of Education, Central South University, Changsha 410078, P. R. China
| | - Tong Liu
- Department
of Clinical Pharmacology, Hunan Key Laboratory of Pharmacogenetics,
and National Clinical Research Center for Geriatric Disorders, Xiangya
Hospital, Central South University, Changsha 410008, P. R. China
- Institute
of Clinical Pharmacology, Engineering Research Center for Applied
Technology of Pharmacogenomics of Ministry of Education, Central South University, Changsha 410078, P. R. China
| | - Ji-Wei Guo
- Department
of Clinical Pharmacology, Hunan Key Laboratory of Pharmacogenetics,
and National Clinical Research Center for Geriatric Disorders, Xiangya
Hospital, Central South University, Changsha 410008, P. R. China
- Institute
of Clinical Pharmacology, Engineering Research Center for Applied
Technology of Pharmacogenomics of Ministry of Education, Central South University, Changsha 410078, P. R. China
| | - Hong-Hao Zhou
- Department
of Clinical Pharmacology, Hunan Key Laboratory of Pharmacogenetics,
and National Clinical Research Center for Geriatric Disorders, Xiangya
Hospital, Central South University, Changsha 410008, P. R. China
- Institute
of Clinical Pharmacology, Engineering Research Center for Applied
Technology of Pharmacogenomics of Ministry of Education, Central South University, Changsha 410078, P. R. China
| | - Zhi-Quan Yang
- Department
of Neurosurgery, Xiangya Hospital, Central
South University, Changsha 410008, P. R. China
- . Phone: +86 731 89753845. Fax: +86 731 82354476
| | - Xiao-Yuan Mao
- Department
of Clinical Pharmacology, Hunan Key Laboratory of Pharmacogenetics,
and National Clinical Research Center for Geriatric Disorders, Xiangya
Hospital, Central South University, Changsha 410008, P. R. China
- Institute
of Clinical Pharmacology, Engineering Research Center for Applied
Technology of Pharmacogenomics of Ministry of Education, Central South University, Changsha 410078, P. R. China
| | - Zhao-Qian Liu
- Department
of Clinical Pharmacology, Hunan Key Laboratory of Pharmacogenetics,
and National Clinical Research Center for Geriatric Disorders, Xiangya
Hospital, Central South University, Changsha 410008, P. R. China
- Institute
of Clinical Pharmacology, Engineering Research Center for Applied
Technology of Pharmacogenomics of Ministry of Education, Central South University, Changsha 410078, P. R. China
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9
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Kim MJ, Han C, White K, Park HJ, Ding D, Boyd K, Rothenberger C, Bose U, Carmichael P, Linser PJ, Tanokura M, Salvi R, Someya S. Txn2 haplodeficiency does not affect cochlear antioxidant defenses or accelerate the progression of cochlear cell loss or hearing loss across the lifespan. Exp Gerontol 2020; 141:111078. [PMID: 32866605 DOI: 10.1016/j.exger.2020.111078] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 07/16/2020] [Accepted: 08/25/2020] [Indexed: 11/16/2022]
Abstract
Thioredoxin 2 (TXN2) is a small redox protein found in nearly all organisms. As a mitochondrial member of the thioredoxin antioxidant defense system, TXN2 interacts with peroxiredoxin 3 (PRDX3) to remove hydrogen peroxide. Accordingly, TXN2 is thought to play an important role in maintaining the appropriate mitochondrial redox environment and protecting the mitochondrial components against oxidative stress. In the current study, we investigated the effects of Txn2 haplodeficiency on cochlear antioxidant defenses, auditory function, and cochlear cell loss across the lifespan in wild-type (WT) and Txn2 heterozygous knockout (Txn2+/-) mice backcrossed onto CBA/CaJ mice, a well-established model of age-related hearing loss. Txn2+/- mice displayed a 58% decrease in TXN2 protein levels in the mitochondria of the inner ears compared to WT mice. However, Txn2 haplodeficiency did not affect the thioredoxin or glutathione antioxidant defense in both the mitochondria and cytosol of the inner ears of young mice. There were no differences in the levels of mitochondrial biogenesis markers, mitochondrial DNA content, or oxidative DNA and protein damage markers in the inner ears between young WT and Txn2+/- mice. In a mouse inner ear cell line, knockdown of Txn2 did not affect cell viability under hydrogen peroxide treatment. Consistent with the tissue and cell line results, there were no differences in hair cell loss or spiral ganglion neuron density between WT and Txn2+/- mice at 3-5 or 23-25 months of age. Furthermore, Txn2 haplodeficiency did not affect auditory brainstem response threshold, wave I latency, or wave I amplitude at 3-5, 15-16, or 23-25 months of age. Therefore, Txn2 haplodeficiency does not affect cochlear antioxidant defenses, accelerate degeneration of cochlear cells, or affect auditory function in mice across the lifespan.
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Affiliation(s)
- Mi-Jung Kim
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - Chul Han
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - Karessa White
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - Hyo-Jin Park
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - Dalian Ding
- Center for Hearing and Deafness, State University of New York at Buffalo, NY, USA
| | - Kevin Boyd
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | | | - Upal Bose
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - Peter Carmichael
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - Paul J Linser
- Whitney Laboratory, University of Florida, St Augustine, FL, USA
| | - Masaru Tanokura
- Department of Applied Biological Chemistry, University of Tokyo, Yayoi, Tokyo, Japan
| | - Richard Salvi
- Center for Hearing and Deafness, State University of New York at Buffalo, NY, USA
| | - Shinichi Someya
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA.
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Increased burden of mitochondrial DNA deletions and point mutations in early-onset age-related hearing loss in mitochondrial mutator mice. Exp Gerontol 2019; 125:110675. [PMID: 31344454 DOI: 10.1016/j.exger.2019.110675] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 07/14/2019] [Accepted: 07/20/2019] [Indexed: 11/20/2022]
Abstract
Mitochondrial DNA (mtDNA) mutations are thought to have a causal role in a variety of age-related neurodegenerative diseases, including age-related hearing loss (AHL). In the current study, we investigated the roles of mtDNA deletions and point mutations in AHL in mitochondrial mutator mice (Polgmut/mut) that were backcrossed onto CBA/CaJ mice, a well-established model of late-onset AHL. mtDNA deletions accumulated significantly with age in the inner ears of Polgmut/mut mice, while there were no differences in mtDNA deletion frequencies in the inner ears between 5 and 17 months old Polg+/+ mice or 5 months old Polg+/+ and Polgmut/mut mice. mtDNA deletions also accumulated significantly in the inner ears of CBA/CaJ mice during normal aging. In contrast, 5 months old Polgmut/mut mice displayed a 238-fold increase in mtDNA point mutation frequencies in the inner ears compared to age-matched Polg+/+ mice, but there were no differences in mtDNA point mutation frequencies in the inner ears between 5 and 17 months old Polgmut/mut mice. Seventeen-month-old Polgmut/mut mice also displayed early-onset severe hearing loss associated with a significant reduction in neural output of the cochlea, while age-matched Polg+/+ mice displayed little or no hearing impairment. Consistent with the physiological and mtDNA deletion test result, 17-month-old Polgmut/mut mice displayed a profound loss of spiral ganglion neurons in the cochlea. Thus, our data suggest that a higher burden of mtDNA point mutations from a young age and age-related accumulation of mtDNA deletions likely contribute to early-onset AHL in mitochondrial mutator mice.
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11
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Microcystin-LR promotes necroptosis in primary mouse hepatocytes by overproducing reactive oxygen species. Toxicol Appl Pharmacol 2019; 377:114626. [PMID: 31201821 DOI: 10.1016/j.taap.2019.114626] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Revised: 05/31/2019] [Accepted: 06/11/2019] [Indexed: 12/22/2022]
Abstract
Microcystin-LR (MC-LR) is a type of cyclic heptapeptide toxin produced by cyanobacteria during bloom events. MC-LR-induced cell death is critically involved in its potent specific hepatotoxicity. Many studies have demonstrated that prototypical apoptosis as a form of programmed cell death after MC-LR is associated with liver injury. However, whether another form of programmed cell death exists and the underlying mechanism have not been reported. Here, we demonstrate that MC-LR can induce necroptosis via ROS overactivation in primary mouse hepatocytes. Various potential pathways of programmed cell death induced by MC-LR were evaluated by annexin V/PI dual staining for flow cytometric analysis, image-based PI staining analysis and western blot analysis. Cell viability was determined by the CCK8 assay. Rupture of the plasma membrane was indicated by lactate dehydrogenase release. ROS was evaluated with the carboxy-H2DCFDA fluorescent probe. It was found that in MC-LR-treated cells, as the plasma membrane was damaged, annexin V/PI-stained double-positive cells were significantly induced and PI-stained nuclei were more diffuse. Western blot analysis showed that MC-LR treatment significantly upregulated the expression of necroptotic and apoptotic proteins. Mechanistically, MC-LR induced ROS overproduction by dysregulating the expression and activity of the pro-oxidants SOD1, MAOA, and NOX4 and the antioxidant GPX1. These results indicate the presence of a novel mechanism for MC-LR-mediated liver injury and present a novel target in the treatment of MC-LR-exposed patients.
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12
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White K, Kim MJ, Han C, Park HJ, Ding D, Boyd K, Walker L, Linser P, Meneses Z, Slade C, Hirst J, Santostefano K, Terada N, Miyakawa T, Tanokura M, Salvi R, Someya S. Loss of IDH2 Accelerates Age-related Hearing Loss in Male Mice. Sci Rep 2018; 8:5039. [PMID: 29567975 PMCID: PMC5864918 DOI: 10.1038/s41598-018-23436-w] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 03/13/2018] [Indexed: 11/29/2022] Open
Abstract
Isocitrate dehydrogenase (IDH) 2 participates in the TCA cycle and catalyzes the conversion of isocitrate to α-ketoglutarate and NADP+ to NADPH. In the mitochondria, IDH2 also plays a key role in protecting mitochondrial components from oxidative stress by supplying NADPH to both glutathione reductase (GSR) and thioredoxin reductase 2 (TXNRD2). Here, we report that loss of Idh2 accelerates age-related hearing loss, the most common form of hearing impairment, in male mice. This was accompanied by increased oxidative DNA damage, increased apoptotic cell death, and profound loss of spiral ganglion neurons and hair cells in the cochlea of 24-month-old Idh2−/− mice. In young male mice, loss of Idh2 resulted in decreased NADPH redox state and decreased activity of TXNRD2 in the mitochondria of the inner ear. In HEI-OC1 mouse inner ear cell lines, knockdown of Idh2 resulted in a decline in cell viability and mitochondrial oxygen consumption. This was accompanied by decreased NADPH redox state and decreased activity of TXNRD2 in the mitochondria of the HEI-OC1 cells. Therefore, IDH2 functions as the principal source of NADPH for the mitochondrial thioredoxin antioxidant defense and plays an essential role in protecting hair cells and neurons against oxidative stress in the cochlea of male mice.
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Affiliation(s)
- Karessa White
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida, 32610, United States
| | - Mi-Jung Kim
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida, 32610, United States
| | - Chul Han
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida, 32610, United States
| | - Hyo-Jin Park
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida, 32610, United States
| | - Dalian Ding
- Center for Hearing and Deafness, State University of New York at Buffalo, New York, 14214, United States
| | - Kevin Boyd
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida, 32610, United States
| | - Logan Walker
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida, 32610, United States
| | - Paul Linser
- Whitney Laboratory, University of Florida, St Augustine, Florida, 32080, United States
| | - Zaimary Meneses
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida, 32610, United States
| | - Cole Slade
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida, 32610, United States
| | - Jonathan Hirst
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida, 32610, United States
| | - Katherine Santostefano
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL, 32610, United States
| | - Naohiro Terada
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL, 32610, United States
| | - Takuya Miyakawa
- Department of Applied Biological Chemistry, University of Tokyo, Yayoi, Tokyo, 113, Japan
| | - Masaru Tanokura
- Department of Applied Biological Chemistry, University of Tokyo, Yayoi, Tokyo, 113, Japan
| | - Richard Salvi
- Center for Hearing and Deafness, State University of New York at Buffalo, New York, 14214, United States
| | - Shinichi Someya
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida, 32610, United States.
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