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Wu J, Zhao Q, Chen S, Xu H, Zhang R, Cai D, Gao Y, Peng W, Chen X, Yuan S, Li D, Li G, Nan A. NSUN4-mediated m5C modification of circERI3 promotes lung cancer development by altering mitochondrial energy metabolism. Cancer Lett 2024; 605:217266. [PMID: 39332589 DOI: 10.1016/j.canlet.2024.217266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2024] [Revised: 09/13/2024] [Accepted: 09/18/2024] [Indexed: 09/29/2024]
Abstract
As a highly important methylation modification, the 5-methyladenosine (m5C) modification can profoundly affect RNAs by regulating their transcription, structure and stability. With the continuous development of high-throughput technology, differentially expressed circular RNAs (circRNAs) have been increasingly discovered, and circRNAs play unique roles in tumorigenesis and development. However, the regulatory mechanism of the m5C modification of circRNAs has not yet been revealed. In this study, circERI3, which is highly expressed in lung cancer tissue and significantly correlated with the clinical progression of lung cancer, was initially identified through differential expression profiling of circRNAs. A combined m5C microarray analysis revealed that circERI3 contains the m5C modification and that the NSUN4-mediated m5C modification of circERI3 can increase its nuclear export. The important function of circERI3 in promoting lung cancer progression in vitro and in vivo was clarified. Moreover, we elucidated the novel mechanism by which circERI3 targets DNA binding protein 1 (DDB1), regulates its ubiquitination, enhances its stability, and in turn promotes the transcription of peroxisome proliferator-activated receptor γ coactivator 1α (PGC-1α) through DDB1 to affect mitochondrial function and energy metabolism, which ultimately promotes the development of lung cancer. This study not only revealed the reasons for the abnormal distribution of circERI3 in lung cancer tissues from the perspective of methylation and clarified the important role of circERI3 in lung cancer progression but also described a novel mechanism by which circERI3 promotes lung cancer development through mitochondrial energy metabolism, providing new insights for the study of circRNAs in lung cancer.
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Affiliation(s)
- Jiaxi Wu
- School of Public Health, Guangxi Medical University, Nanning 530021, China; Guangxi Key Laboratory of Environment and Health Research, Guangxi Medical University, Nanning, 530021, China
| | - Qingyun Zhao
- School of Public Health, Guangxi Medical University, Nanning 530021, China; Guangxi Key Laboratory of Environment and Health Research, Guangxi Medical University, Nanning, 530021, China
| | - Sixian Chen
- School of Public Health, Guangxi Medical University, Nanning 530021, China; Guangxi Key Laboratory of Environment and Health Research, Guangxi Medical University, Nanning, 530021, China
| | - Haotian Xu
- School of Public Health, Guangxi Medical University, Nanning 530021, China; Guangxi Key Laboratory of Environment and Health Research, Guangxi Medical University, Nanning, 530021, China
| | - Ruirui Zhang
- School of Public Health, Guangxi Medical University, Nanning 530021, China; Guangxi Key Laboratory of Environment and Health Research, Guangxi Medical University, Nanning, 530021, China
| | - Dunyu Cai
- School of Public Health, Guangxi Medical University, Nanning 530021, China; Guangxi Key Laboratory of Environment and Health Research, Guangxi Medical University, Nanning, 530021, China
| | - Yihong Gao
- School of Public Health, Guangxi Medical University, Nanning 530021, China; Guangxi Key Laboratory of Environment and Health Research, Guangxi Medical University, Nanning, 530021, China
| | - Wenyi Peng
- School of Public Health, Guangxi Medical University, Nanning 530021, China; Guangxi Key Laboratory of Environment and Health Research, Guangxi Medical University, Nanning, 530021, China
| | - Xingcai Chen
- School of Public Health, Guangxi Medical University, Nanning 530021, China; Guangxi Key Laboratory of Environment and Health Research, Guangxi Medical University, Nanning, 530021, China
| | - Shengyi Yuan
- School of Public Health, Guangxi Medical University, Nanning 530021, China; Guangxi Key Laboratory of Environment and Health Research, Guangxi Medical University, Nanning, 530021, China
| | - Deqing Li
- School of Public Health, Guangxi Medical University, Nanning 530021, China; Guangxi Key Laboratory of Environment and Health Research, Guangxi Medical University, Nanning, 530021, China
| | - Gang Li
- School of Public Health, Guangxi Medical University, Nanning 530021, China; Guangxi Key Laboratory of Environment and Health Research, Guangxi Medical University, Nanning, 530021, China.
| | - Aruo Nan
- School of Public Health, Guangxi Medical University, Nanning 530021, China; Guangxi Key Laboratory of Environment and Health Research, Guangxi Medical University, Nanning, 530021, China.
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2
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Mandal A, Singh S, Arora A, Nambiar SS, Ghosh SS, Khan AT. L-Proline-catalysed synthesis of chromeno[2,3- b]chromene from 4-hydroxy-2 H-chromene-2-thione and an anti-proliferative study. Org Biomol Chem 2024; 22:5333-5345. [PMID: 38853721 DOI: 10.1039/d4ob00509k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2024]
Abstract
The reactivity of 4-hydroxy-2H-chromene-2-thione is investigated with aryl aldehydes and 5,5-dimethylcylohexane-1,3-dione (dimedone) in the presence of 20 mol% L-proline in toluene at 90 °C. Instead of the expected linear product with a sulphur atom in the ring provided by 4-hydroxydithiocoumarin or an angular product obtained from 4-hydroxycoumarin, the hitherto unreported products, 12-aryl substituted chromeno[2,3-b]chromenes (4), were obtained in good to excellent yields. The reaction proceeds through a three-component reaction via Knoevenagel condensation between dimedone with an aromatic aldehyde followed by Michael addition with 4-hydroxy-2H-chromene-2-thione. In addition, a molecular docking study of all the derivatives was performed and among them, four compounds exhibited anti-proliferative activity and elevated ROS generation in breast cancer (MCF7) cell lines.
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Affiliation(s)
- Arnab Mandal
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India.
| | - Satyajit Singh
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India.
| | - Arisha Arora
- Department of Bioscience and Bioengineering, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India
| | - Sujisha S Nambiar
- Department of Bioscience and Bioengineering, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India
| | - Siddhartha S Ghosh
- Department of Bioscience and Bioengineering, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India
| | - Abu Taleb Khan
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India.
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3
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Xu F, Valappil AK, Zheng S, Zheng B, Yang D, Wang Q. 3,5-DCQA as a Major Molecule in MeJA-Treated Dendropanax morbifera Adventitious Root to Promote Anti-Lung Cancer and Anti-Inflammatory Activities. Biomolecules 2024; 14:705. [PMID: 38927108 PMCID: PMC11201925 DOI: 10.3390/biom14060705] [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: 05/15/2024] [Revised: 06/12/2024] [Accepted: 06/13/2024] [Indexed: 06/28/2024] Open
Abstract
(1) Background: Phytochemicals are crucial antioxidants that play a significant role in preventing cancer. (2) Methods: We explored the use of methyl jasmonate (MeJA) in the in vitro cultivation of D. morbifera adventitious roots (DMAR) and evaluated its impact on secondary metabolite production in DMAR, optimizing concentration and exposure time for cost-effectiveness. We also assessed its anti-inflammatory and anti-lung cancer activities and related gene expression levels. (3) Results: MeJA treatment significantly increased the production of the phenolic compound 3,5-Di-caffeoylquinic acid (3,5-DCQA). The maximum 3,5-DCQA production was achieved with a MeJA treatment at 40 µM for 36 h. MeJA-DMARE displayed exceptional anti-inflammatory activity by inhibiting the production of nitric oxide (NO) and reactive oxygen species (ROS) in LPS-induced RAW 264.7 cells. Moreover, it downregulated the mRNA expression of key inflammation-related cytokines. Additionally, MeJA-DMARE exhibited anti-lung cancer activity by promoting ROS production in A549 lung cancer cells and inhibiting its migration. It also modulated apoptosis in lung cancer cells via the Bcl-2 and p38 MAPK pathways. (4) Conclusions: MeJA-treated DMARE with increased 3,5-DCQA production holds significant promise as a sustainable and novel material for pharmaceutical applications thanks to its potent antioxidant, anti-inflammatory, and anti-lung cancer properties.
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Affiliation(s)
- Fengjiao Xu
- State Key Laboratory of Plant Environmental Resilience, College of Life Sciences, Zhejiang University, Hangzhou 310058, China; (F.X.); (S.Z.)
- School of Biological and Chemical Engineering, NingboTech University, Ningbo 315100, China
| | - Anjali Kariyarath Valappil
- Department of Biopharmaceutical Biotechnology, College of Life Science, Kyung Hee University, Yongin-si 17104, Republic of Korea;
| | - Shaojian Zheng
- State Key Laboratory of Plant Environmental Resilience, College of Life Sciences, Zhejiang University, Hangzhou 310058, China; (F.X.); (S.Z.)
| | - Bingsong Zheng
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China;
| | - Deokchun Yang
- Department of Biopharmaceutical Biotechnology, College of Life Science, Kyung Hee University, Yongin-si 17104, Republic of Korea;
| | - Qiang Wang
- School of Biological and Chemical Engineering, NingboTech University, Ningbo 315100, China
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4
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Wang Y, Ai Q, Gu M, Guan H, Yang W, Zhang M, Mao J, Lin Z, Liu Q, Liu J. Comprehensive overview of different medicinal parts from Morus alba L.: chemical compositions and pharmacological activities. Front Pharmacol 2024; 15:1364948. [PMID: 38694910 PMCID: PMC11061381 DOI: 10.3389/fphar.2024.1364948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 03/25/2024] [Indexed: 05/04/2024] Open
Abstract
Morus alba L., a common traditional Chinese medicine (TCM) with a centuries-old medicinal history, owned various medicinal parts like Mori folium, Mori ramulus, Mori cortex and Mori fructus. Different medical parts exhibit distinct modern pharmacological effects. Mori folium exhibited analgesic, anti-inflammatory, hypoglycemic action and lipid-regulation effects. Mori ramulus owned anti-bacterial, anti-asthmatic and diuretic activities. Mori cortex showed counteraction action of pain, inflammatory, bacterial, and platelet aggregation. Mori fructus could decompose fat, lower blood lipids and prevent vascular sclerosis. The main chemical components in Morus alba L. covered flavonoids, phenolic compounds, alkaloids, and amino acids. This article comprehensively analyzed the recent literature related to chemical components and pharmacological actions of M. alba L., summarizing 198 of ingredients and described the modern activities of different extracts and the bioactive constituents in the four parts from M. alba L. These results fully demonstrated the medicinal value of M. alba L., provided valuable references for further comprehensive development, and layed the foundation for the utilization of M. alba L.
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Affiliation(s)
- Yumei Wang
- The Research Institute of Medicine and Pharmacy, Qiqihar Medical University, Qiqihar, China
| | - Qing Ai
- The Research Institute of Medicine and Pharmacy, Qiqihar Medical University, Qiqihar, China
- School of Pharmacy, Qiqihar Medical University, Qiqihar, China
| | - Meiling Gu
- The Research Institute of Medicine and Pharmacy, Qiqihar Medical University, Qiqihar, China
- School of Pharmacy, Qiqihar Medical University, Qiqihar, China
| | - Hong Guan
- Office of Academic Research, Qiqihar Medical University, Qiqihar, China
| | - Wenqin Yang
- Office of Academic Research, Qiqihar Medical University, Qiqihar, China
| | - Meng Zhang
- The Research Institute of Medicine and Pharmacy, Qiqihar Medical University, Qiqihar, China
- School of Pharmacy, Qiqihar Medical University, Qiqihar, China
| | - Jialin Mao
- The Research Institute of Medicine and Pharmacy, Qiqihar Medical University, Qiqihar, China
| | - Zhao Lin
- The Research Institute of Medicine and Pharmacy, Qiqihar Medical University, Qiqihar, China
| | - Qi Liu
- The Research Institute of Medicine and Pharmacy, Qiqihar Medical University, Qiqihar, China
| | - Jicheng Liu
- The Research Institute of Medicine and Pharmacy, Qiqihar Medical University, Qiqihar, China
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5
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Hao S, Cai D, Gou S, Li Y, Liu L, Tang X, Chen Y, Zhao Y, Shen J, Wu X, Li M, Chen M, Li X, Sun Y, Gu L, Li W, Wang F, Cho CH, Xiao Z, Du F. Does each Component of Reactive Oxygen Species have a Dual Role in the Tumor Microenvironment? Curr Med Chem 2024; 31:4958-4986. [PMID: 37469162 PMCID: PMC11340293 DOI: 10.2174/0929867331666230719142202] [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: 03/24/2023] [Revised: 05/14/2023] [Accepted: 06/02/2023] [Indexed: 07/21/2023]
Abstract
Reactive oxygen species (ROS) are a class of highly reactive oxidizing molecules, including superoxide anion (O2 •-) and hydrogen peroxide (H2O2), among others. Moderate levels of ROS play a crucial role in regulating cellular signaling and maintaining cellular functions. However, abnormal ROS levels or persistent oxidative stress can lead to changes in the tumor microenvironment (TME) that favor cancer development. This review provides an overview of ROS generation, structure, and properties, as well as their effects on various components of the TME. Contrary to previous studies, our findings reveal a dual effect of ROS on different components of the TME, whereby ROS can either enhance or inhibit certain factors, ultimately leading to the promotion or suppression of the TME. For example, H2O2 has dual effects on immune cells and non-- cellular components within the TME, while O2 •- has dual effects on T cells and fibroblasts. Furthermore, each component demonstrates distinct mechanisms of action and ranges of influence. In the final section of the article, we summarize the current clinical applications of ROS in cancer treatment and identify certain limitations associated with existing therapeutic approaches. Therefore, this review aims to provide a comprehensive understanding of ROS, highlighting their dual effects on different components of the TME, and exploring the potential clinical applications that may pave the way for future treatment and prevention strategies.
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Affiliation(s)
- Siyu Hao
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Sichuan Luzhou 646600, China
- Cell Therapy & Cell Drugs of Luzhou Key Laboratory, Sichuan Luzhou, 646000, China
| | - Dan Cai
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Sichuan Luzhou 646600, China
- Cell Therapy & Cell Drugs of Luzhou Key Laboratory, Sichuan Luzhou, 646000, China
- South Sichuan Institute of Translational Medicine, Sichuan Luzhou 646600, China
| | - Shuang Gou
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Sichuan Luzhou 646600, China
- Cell Therapy & Cell Drugs of Luzhou Key Laboratory, Sichuan Luzhou, 646000, China
| | - Yan Li
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Sichuan Luzhou 646600, China
| | - Lin Liu
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Sichuan Luzhou 646600, China
- Cell Therapy & Cell Drugs of Luzhou Key Laboratory, Sichuan Luzhou, 646000, China
- South Sichuan Institute of Translational Medicine, Sichuan Luzhou 646600, China
| | - Xiaolong Tang
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Sichuan Luzhou 646600, China
- Cell Therapy & Cell Drugs of Luzhou Key Laboratory, Sichuan Luzhou, 646000, China
| | - Yu Chen
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Sichuan Luzhou 646600, China
- Cell Therapy & Cell Drugs of Luzhou Key Laboratory, Sichuan Luzhou, 646000, China
- South Sichuan Institute of Translational Medicine, Sichuan Luzhou 646600, China
| | - Yueshui Zhao
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Sichuan Luzhou 646600, China
- Cell Therapy & Cell Drugs of Luzhou Key Laboratory, Sichuan Luzhou, 646000, China
- South Sichuan Institute of Translational Medicine, Sichuan Luzhou 646600, China
| | - Jing Shen
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Sichuan Luzhou 646600, China
- Cell Therapy & Cell Drugs of Luzhou Key Laboratory, Sichuan Luzhou, 646000, China
- South Sichuan Institute of Translational Medicine, Sichuan Luzhou 646600, China
| | - Xu Wu
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Sichuan Luzhou 646600, China
- Cell Therapy & Cell Drugs of Luzhou Key Laboratory, Sichuan Luzhou, 646000, China
- South Sichuan Institute of Translational Medicine, Sichuan Luzhou 646600, China
| | - Mingxing Li
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Sichuan Luzhou 646600, China
- Cell Therapy & Cell Drugs of Luzhou Key Laboratory, Sichuan Luzhou, 646000, China
- South Sichuan Institute of Translational Medicine, Sichuan Luzhou 646600, China
| | - Meijuan Chen
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Sichuan Luzhou 646600, China
| | - Xiaobing Li
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Sichuan Luzhou 646600, China
| | - Yuhong Sun
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Sichuan Luzhou 646600, China
| | - Li Gu
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Sichuan Luzhou 646600, China
| | - Wanping Li
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Sichuan Luzhou 646600, China
| | - Fang Wang
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Sichuan Luzhou 646600, China
| | - Chi Hin Cho
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Sichuan Luzhou 646600, China
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China;
| | - Zhangang Xiao
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Sichuan Luzhou 646600, China
- Cell Therapy & Cell Drugs of Luzhou Key Laboratory, Sichuan Luzhou, 646000, China
- South Sichuan Institute of Translational Medicine, Sichuan Luzhou 646600, China
- Department of Oncology, Affiliated Hospital of Southwest Medical University, Sichuan Luzhou 646600, China
| | - Fukuan Du
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Sichuan Luzhou 646600, China
- Cell Therapy & Cell Drugs of Luzhou Key Laboratory, Sichuan Luzhou, 646000, China
- South Sichuan Institute of Translational Medicine, Sichuan Luzhou 646600, China
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6
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Patil AS, Ibrahim MK, Sathaye S, Degani MS, Pal D, Checker R, Sharma D, Sandur SK. Mitochondriotropic Derivative of Ethyl Ferulate, a Dietary Phenylpropanoid, Exhibits Enhanced Cytotoxicity in Cancer Cells via Mitochondrial Superoxide-Mediated Activation of JNK and AKT Signalling. Appl Biochem Biotechnol 2023; 195:2057-2076. [PMID: 36409426 DOI: 10.1007/s12010-022-04252-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/08/2022] [Indexed: 11/22/2022]
Abstract
Specific targeting of anti-cancer drugs to mitochondria is an emerging strategy to enhance cancer cell killing whilst simultaneously overcoming the problem of drug resistance, low bioavailability and limited clinical success of natural products. We have synthesized a mitochondria targeted derivative of Ethyl Ferulate (EF, a naturally occurring ester of ferulic acid), by conjugating it with triphenylphosphonium ion and compared its cytotoxicity with the parent molecule. Mito-Ethyl Ferulate (M-EF) was found to be more potent than EF (~ 400-fold) in inhibiting the growth of A549 and MCF-7 cells and suppressing the clonogenic potential of A549 cells. Notably, M-EF did not induce any cytotoxicity in normal cells (mouse normal fibroblast cells) up to a concentration of 25 μM. Furthermore, M-EF treatment induced significantly higher cell death in MCF-7 and A549 cells, as compared to EF via induction of apoptosis. M-EF treatment increased mitochondrial superoxide production and induced mitochondrial DNA damage and phosphorylation of JNK and AKT in A549 cells. Furthermore, M-EF induced increase in mitochondrial superoxide production and cytotoxicity was attenuated on pre-treatment with mitochondria-targeted antioxidant (mitoTEMPO) indicating the involvement of mitochondrial ROS in the cytotoxic effects of M-EF. Finally, in silico prediction revealed putative mitochondrial targets of M-EF which are known to regulate mitochondrial ROS and cell viability. In conclusion, the improved cytotoxic efficacy of M-EF exemplifies the use of mitochondria-specific drug delivery in future development of natural product based mitochondrial pharmacology.
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Affiliation(s)
- Ashwani S Patil
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai, 400019, India.,Department of Pharmacology, Dr D Y Patil Institute of Pharmaceutical Sciences and Research, Pimpri, Pune, 411018, India
| | - Mahin K Ibrahim
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai, 400019, India
| | - Sadhana Sathaye
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai, 400019, India.
| | - Mariam S Degani
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai, 400019, India.
| | - Debojyoti Pal
- Radiation Biology & Health Sciences Division, Bio-Science Group, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India.,Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India
| | - Rahul Checker
- Radiation Biology & Health Sciences Division, Bio-Science Group, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India. .,Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India.
| | - Deepak Sharma
- Radiation Biology & Health Sciences Division, Bio-Science Group, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India.,Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India
| | - Santosh K Sandur
- Radiation Biology & Health Sciences Division, Bio-Science Group, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India.,Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India
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7
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Yang Y, Chen Y, Wu JH, Ren Y, Liu B, Zhang Y, Yu H. Targeting regulated cell death with plant natural compounds for cancer therapy: A revisited review of apoptosis, autophagy-dependent cell death, and necroptosis. Phytother Res 2023; 37:1488-1525. [PMID: 36717200 DOI: 10.1002/ptr.7738] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Revised: 01/05/2023] [Accepted: 01/05/2023] [Indexed: 02/01/2023]
Abstract
Regulated cell death (RCD) refers to programmed cell death regulated by various protein molecules, such as apoptosis, autophagy-dependent cell death, and necroptosis. Accumulating evidence has recently revealed that RCD subroutines have several links to many types of human cancer; therefore, targeting RCD with pharmacological small-molecule compounds would be a promising therapeutic strategy. Moreover, plant natural compounds, small-molecule compounds synthesized from plant sources, and their derivatives have been widely reported to regulate different RCD subroutines to improve potential cancer therapy. Thus, in this review, we focus on updating the intricate mechanisms of apoptosis, autophagy-dependent cell death, and necroptosis in cancer. Moreover, we further discuss several representative plant natural compounds and their derivatives that regulate the above-mentioned three subroutines of RCD, and their potential as candidate small-molecule drugs for the future cancer treatment.
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Affiliation(s)
- Yuanyuan Yang
- State Key Laboratory of Biotherapy and Cancer Center, Department of Otolaryngology, Head and Neck Surgery and Lung Cancer Center, West China Hospital, Sichuan University, Chengdu, China
| | - Yanmei Chen
- State Key Laboratory of Biotherapy and Cancer Center, Department of Otolaryngology, Head and Neck Surgery and Lung Cancer Center, West China Hospital, Sichuan University, Chengdu, China
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Jun Hao Wu
- State Key Laboratory of Biotherapy and Cancer Center, Department of Otolaryngology, Head and Neck Surgery and Lung Cancer Center, West China Hospital, Sichuan University, Chengdu, China
| | - Yueting Ren
- Department of Pharmacology and Toxicology, Temerity Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Bo Liu
- State Key Laboratory of Biotherapy and Cancer Center, Department of Otolaryngology, Head and Neck Surgery and Lung Cancer Center, West China Hospital, Sichuan University, Chengdu, China
| | - Yan Zhang
- State Key Laboratory of Biotherapy and Cancer Center, Department of Otolaryngology, Head and Neck Surgery and Lung Cancer Center, West China Hospital, Sichuan University, Chengdu, China
| | - Haiyang Yu
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
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8
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Sericultural By-Products: The Potential for Alternative Therapy in Cancer Drug Design. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020850. [PMID: 36677907 PMCID: PMC9861160 DOI: 10.3390/molecules28020850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 01/10/2023] [Accepted: 01/11/2023] [Indexed: 01/18/2023]
Abstract
Major progress has been made in cancer research; however, cancer remains one of the most important health-related burdens. Sericulture importance is no longer limited to the textile industry, but its by-products, such as silk fibroin or mulberry, exhibit great impact in the cancer research area. Fibroin, the pivotal compound that is found in silk, owns superior biocompatibility and biodegradability, representing one of the most important biomaterials. Numerous studies have reported its successful use as a drug delivery system, and it is currently used to develop three-dimensional tumor models that lead to a better understanding of cancer biology and play a great role in the development of novel antitumoral strategies. Moreover, sericin's cytotoxic effect on various tumoral cell lines has been reported, but also, it has been used as a nanocarrier for target therapeutic agents. On the other hand, mulberry compounds include various bioactive elements that are well known for their antitumoral activities, such as polyphenols or anthocyanins. In this review, the latest progress of using sericultural by-products in cancer therapy is discussed by highlighting their notable impact in developing novel effective drug strategies.
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9
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Luo SY, Zhu JY, Zou MF, Yin S, Tang GH. Mulberry Diels-Alder-type adducts: isolation, structure, bioactivity, and synthesis. NATURAL PRODUCTS AND BIOPROSPECTING 2022; 12:31. [PMID: 36050566 PMCID: PMC9436459 DOI: 10.1007/s13659-022-00355-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 06/21/2022] [Indexed: 06/15/2023]
Abstract
Mulberry Diels-Alder-type adducts (MDAAs) are unique phenolic natural products biosynthetically derived from the intermolecular [4 + 2]-cycloaddition of dienophiles (mainly chalcones) and dehydroprenylphenol dienes, which are exclusively distributed in moraceous plants. A total of 166 MDAAs with diverse skeletons have been isolated and identified since 1980. Structurally, the classic MDAAs characterized by the chalcone-skeleton dienophiles can be divided into eight groups (Types A - H), while others with non-chalcone dienophiles or some variations of classic MDAAs are non-classic MDAAs (Type I). These compounds have attracted significant attention of natural products and synthetic chemists due to their complex architectures, remarkable biological activities, and synthetic challenges. The present review provides a comprehensive summary of the structural properties, bioactivities, and syntheses of MDAAs. Cited references were collected between 1980 and 2021 from the SciFinder, Web of Science, and China National Knowledge Internet (CNKI).
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Affiliation(s)
- Si-Yuan Luo
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, Guangdong, 510006, People's Republic of China
| | - Jun-Yu Zhu
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, Guangdong, 510006, People's Republic of China
| | - Ming-Feng Zou
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, Guangdong, 510006, People's Republic of China
| | - Sheng Yin
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, Guangdong, 510006, People's Republic of China
| | - Gui-Hua Tang
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, Guangdong, 510006, People's Republic of China.
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10
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Bailly C. A world tour in the name of natural products. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2022; 100:154080. [PMID: 35405614 DOI: 10.1016/j.phymed.2022.154080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Revised: 03/22/2022] [Accepted: 03/25/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Names of natural products (NP) are usually given depending on the species of origin, be it a plant, a marine organism or a microbial species. In some cases, names have been given with reference to people, animals, music, foods or places. Many NP refer to countries, cities or specific places such as mountains, deserts, seas and oceans. PURPOSE On the basis of NP names, a world tour has been imagined referring to more than one hundred NP with names evocative of over 50 countries and regions. RESULTS The world tour goes from UK (britannin) to Italy (vaticanol) in Europe, from Uganda (ugandoside) to Senegal (senegalene, senegalenines) in Africa, from Brazil (brasilin) to Chile (santiaguine) in South America, from Utah (utahin) to Florida (floridanolide) in the US. It includes Central America (mexicanin, panamine) and the Caribbean islands (jamaicin, bahamaolides). It also crosses Alaska (alaskene) and Canada (quebecol, canadaline). The tour continues throughout Asia, from Thailand (thailandine) to China (Chinaldine) and Pakistan (pakistanamine), to finally reaches Oceania with Australia (australigenin) and Vanuatu (vanuatine), among other countries. This virtual journey, without bordure or wall, brings us to the highest mountains (himalayamine), the deepest oceans (pacificins) and the largest deserts (desertomycin). CONCLUSION In the current period of COVID-19 pandemia, with restricted opportunities for international travels, this NP name-based virtual journey offers a world tour to learn more from nature and to inspire scientists to contribute to the field of NP discovery and drug design. There are also limitations associated with the use of trivial names for NP. NP names can be further exploited for teaching and learning.
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Affiliation(s)
- Christian Bailly
- OncoWitan, Scientific Consulting Office, Lille (Wasquehal) 59290, France.
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11
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Xue J, Wang Y, Liu F, Yang H, Lin B, Li Z, Jing Y, Li D, Hua H. Alkaloid dimers isolated from
Thalictrum baicalense
have antitumor activities. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202200159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jingjing Xue
- Key Laboratory of Structure‐Based Drug Design & Discovery, Ministry of Education Shenyang Pharmaceutical University Shenyang 110016 People's Republic of China
- School of Traditional Chinese Materia Medica Shenyang Pharmaceutical University Shenyang 110016 People's Republic of China
| | - Yuetong Wang
- Key Laboratory of Structure‐Based Drug Design & Discovery, Ministry of Education Shenyang Pharmaceutical University Shenyang 110016 People's Republic of China
- Wuya College of Innovation Shenyang Pharmaceutical University Shenyang 110016 People's Republic of China
| | - Fangshen Liu
- Key Laboratory of Structure‐Based Drug Design & Discovery, Ministry of Education Shenyang Pharmaceutical University Shenyang 110016 People's Republic of China
- School of Traditional Chinese Materia Medica Shenyang Pharmaceutical University Shenyang 110016 People's Republic of China
| | - Hangao Yang
- Key Laboratory of Structure‐Based Drug Design & Discovery, Ministry of Education Shenyang Pharmaceutical University Shenyang 110016 People's Republic of China
- School of Traditional Chinese Materia Medica Shenyang Pharmaceutical University Shenyang 110016 People's Republic of China
| | - Bin Lin
- Key Laboratory of Structure‐Based Drug Design & Discovery, Ministry of Education Shenyang Pharmaceutical University Shenyang 110016 People's Republic of China
- School of Pharmaceutical Engineering Shenyang Pharmaceutical University Shenyang 110016 People's Republic of China
| | - Zhanlin Li
- Key Laboratory of Structure‐Based Drug Design & Discovery, Ministry of Education Shenyang Pharmaceutical University Shenyang 110016 People's Republic of China
- School of Traditional Chinese Materia Medica Shenyang Pharmaceutical University Shenyang 110016 People's Republic of China
| | - Yongkui Jing
- Key Laboratory of Structure‐Based Drug Design & Discovery, Ministry of Education Shenyang Pharmaceutical University Shenyang 110016 People's Republic of China
- Wuya College of Innovation Shenyang Pharmaceutical University Shenyang 110016 People's Republic of China
| | - Dahong Li
- Key Laboratory of Structure‐Based Drug Design & Discovery, Ministry of Education Shenyang Pharmaceutical University Shenyang 110016 People's Republic of China
- School of Traditional Chinese Materia Medica Shenyang Pharmaceutical University Shenyang 110016 People's Republic of China
| | - Huiming Hua
- Key Laboratory of Structure‐Based Drug Design & Discovery, Ministry of Education Shenyang Pharmaceutical University Shenyang 110016 People's Republic of China
- School of Traditional Chinese Materia Medica Shenyang Pharmaceutical University Shenyang 110016 People's Republic of China
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12
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Bo S, Chang SK, Zhu H, Jiang Y, Yang B. Naturally occurring prenylated stilbenoids: food sources, biosynthesis, applications and health benefits. Crit Rev Food Sci Nutr 2022; 63:8083-8106. [PMID: 35373665 DOI: 10.1080/10408398.2022.2056131] [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] [Indexed: 01/05/2023]
Abstract
Prenylated stilbenoids are a unique class of natural phenolic compounds consisting of C6-C2-C6 skeleton with prenyl substitution. They are potential nutraceuticals and dietary supplements presented in some edible plants. Prenylated stilbenoids demonstrate promising health benefits, including antioxidant, anti-cancer, anti-inflammatory, anti-microbial activities. This review reports the structure, bioactivity and potential application of prenylated stilbeniods in food industry. Edible sources of these compounds are compiled and summarized. Structure-activity relationship of prenylated stilbenoids are also highlighted. The biosynthesis strategies of prenylated stilbenoids are reviewed. The findings of these compounds as food preservative, nutraceuticals and food additive are discussed. This paper combines the up-to-date information and gives a full image of prenylated stilbenoids.
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Affiliation(s)
- Shengtao Bo
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, Core Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Guangdong Provincial Key Laboratory of Applied Botany, Guangzhou, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Sui Kiat Chang
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, Core Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Guangdong Provincial Key Laboratory of Applied Botany, Guangzhou, China
| | - Hong Zhu
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, Core Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Guangdong Provincial Key Laboratory of Applied Botany, Guangzhou, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yueming Jiang
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, Core Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Guangdong Provincial Key Laboratory of Applied Botany, Guangzhou, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Bao Yang
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, Core Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Guangdong Provincial Key Laboratory of Applied Botany, Guangzhou, China
- University of Chinese Academy of Sciences, Beijing, China
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13
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Luo Z, Yang J, Zhang J, Meng G, Lu Q, Yang X, Zhao P, Li Y. Physicochemical Properties and Elimination of the Activity of Anti-Nutritional Serine Protease Inhibitors from Mulberry Leaves. Molecules 2022; 27:molecules27061820. [PMID: 35335184 PMCID: PMC8948906 DOI: 10.3390/molecules27061820] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 03/07/2022] [Accepted: 03/08/2022] [Indexed: 02/01/2023] Open
Abstract
Mulberry leaf is an excellent protein resource that can be used as feed additive for livestock and poultry. Nevertheless, the use of mulberry leaves in animal diets is limited by its protease inhibitors, tannic acid and other anti-nutritional factors. This study systematically analyzed the type and activity of serine protease inhibitors (SPIs) from the leaves of 34 mulberry varieties, aiming to reveal the physicochemical properties and inactivation mechanism of SPIs. The types and activities of trypsin inhibitors (TIs) and chymotrypsin inhibitors (CIs) exhibited polymorphisms among different mulberry varieties. The highest number of types of inhibitors was detected in Jinshi, with six TIs (TI-1~TI-6) and six CIs (CI-1~CI-6). TIs and CIs exhibited strong thermal and acid–base stability. High-temperature and high-pressure treatment could reduce the activities of TIs and CIs to a certain extent. β-mercaptoethanol treatment could completely abolish TIs and CIs, suggesting that the disulfide bridges were critical for their inhibitory activities. The Maillard reaction could effectively eliminate the inhibitory activities of TI-1~TI-4 and CI-1~CI-4. This study reveals the physicochemical properties and inactivation mechanisms of the anti-nutritional SPIs from mulberry leaves, which is helpful to exploit mulberry-leaf food with low-activity SPIs, promote the development and utilization of mulberry-leaf resources in animal feed and provide reference for mulberry breeding with different functions.
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Affiliation(s)
- Zhuxing Luo
- College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong 723001, China; (Z.L.); (J.Z.); (Q.L.); (X.Y.)
| | - Jinhong Yang
- Shaanxi Key Laboratory of Sericulture, Ankang University, Ankang 725099, China; (J.Y.); (G.M.)
| | - Jie Zhang
- College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong 723001, China; (Z.L.); (J.Z.); (Q.L.); (X.Y.)
| | - Gang Meng
- Shaanxi Key Laboratory of Sericulture, Ankang University, Ankang 725099, China; (J.Y.); (G.M.)
| | - Qingjun Lu
- College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong 723001, China; (Z.L.); (J.Z.); (Q.L.); (X.Y.)
| | - Xi Yang
- College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong 723001, China; (Z.L.); (J.Z.); (Q.L.); (X.Y.)
| | - Ping Zhao
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China;
| | - Youshan Li
- College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong 723001, China; (Z.L.); (J.Z.); (Q.L.); (X.Y.)
- Correspondence: or
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14
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Koklesova L, Liskova A, Samec M, Zhai K, AL-Ishaq RK, Bugos O, Šudomová M, Biringer K, Pec M, Adamkov M, Hassan STS, Saso L, Giordano FA, Büsselberg D, Kubatka P, Golubnitschaja O. Protective Effects of Flavonoids Against Mitochondriopathies and Associated Pathologies: Focus on the Predictive Approach and Personalized Prevention. Int J Mol Sci 2021; 22:ijms22168649. [PMID: 34445360 PMCID: PMC8395457 DOI: 10.3390/ijms22168649] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 08/07/2021] [Accepted: 08/09/2021] [Indexed: 01/10/2023] Open
Abstract
Multi-factorial mitochondrial damage exhibits a “vicious circle” that leads to a progression of mitochondrial dysfunction and multi-organ adverse effects. Mitochondrial impairments (mitochondriopathies) are associated with severe pathologies including but not restricted to cancers, cardiovascular diseases, and neurodegeneration. However, the type and level of cascading pathologies are highly individual. Consequently, patient stratification, risk assessment, and mitigating measures are instrumental for cost-effective individualized protection. Therefore, the paradigm shift from reactive to predictive, preventive, and personalized medicine (3PM) is unavoidable in advanced healthcare. Flavonoids demonstrate evident antioxidant and scavenging activity are of great therapeutic utility against mitochondrial damage and cascading pathologies. In the context of 3PM, this review focuses on preclinical and clinical research data evaluating the efficacy of flavonoids as a potent protector against mitochondriopathies and associated pathologies.
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Affiliation(s)
- Lenka Koklesova
- Clinic of Obstetrics and Gynecology, Jessenius Faculty of Medicine, Comenius University in Bratislava, 036 01 Martin, Slovakia; (L.K.); (A.L.); (M.S.); (K.B.)
| | - Alena Liskova
- Clinic of Obstetrics and Gynecology, Jessenius Faculty of Medicine, Comenius University in Bratislava, 036 01 Martin, Slovakia; (L.K.); (A.L.); (M.S.); (K.B.)
| | - Marek Samec
- Clinic of Obstetrics and Gynecology, Jessenius Faculty of Medicine, Comenius University in Bratislava, 036 01 Martin, Slovakia; (L.K.); (A.L.); (M.S.); (K.B.)
| | - Kevin Zhai
- Department of Physiology and Biophysics, Weill Cornell Medicine in Qatar, Education City, Qatar Foundation, Doha 24144, Qatar; (K.Z.); (R.K.A.-I.)
| | - Raghad Khalid AL-Ishaq
- Department of Physiology and Biophysics, Weill Cornell Medicine in Qatar, Education City, Qatar Foundation, Doha 24144, Qatar; (K.Z.); (R.K.A.-I.)
| | | | - Miroslava Šudomová
- Museum of Literature in Moravia, Klášter 1, 664 61 Rajhrad, Czech Republic;
| | - Kamil Biringer
- Clinic of Obstetrics and Gynecology, Jessenius Faculty of Medicine, Comenius University in Bratislava, 036 01 Martin, Slovakia; (L.K.); (A.L.); (M.S.); (K.B.)
| | - Martin Pec
- Department of Medical Biology, Jessenius Faculty of Medicine, Comenius University in Bratislava, 036 01 Martin, Slovakia;
| | - Marian Adamkov
- Department of Histology and Embryology, Jessenius Faculty of Medicine, Comenius University in Bratislava, 036 01 Martin, Slovakia;
| | - Sherif T. S. Hassan
- Department of Applied Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague, Czech Republic;
| | - Luciano Saso
- Department of Physiology and Pharmacology “Vittorio Erspamer”, Faculty of Pharmacy and Medicine, Sapienza University, 00185 Rome, Italy;
| | - Frank A. Giordano
- Department of Radiation Oncology, University Hospital Bonn, Rheinische Friedrich-Wilhelms-Universität Bonn, 53127 Bonn, Germany;
| | - Dietrich Büsselberg
- Department of Physiology and Biophysics, Weill Cornell Medicine in Qatar, Education City, Qatar Foundation, Doha 24144, Qatar; (K.Z.); (R.K.A.-I.)
- Correspondence: (D.B.); (P.K.); (O.G.)
| | - Peter Kubatka
- Department of Medical Biology, Jessenius Faculty of Medicine, Comenius University in Bratislava, 036 01 Martin, Slovakia;
- European Association for Predictive, Preventive and Personalised Medicine, EPMA, 1150 Brussels, Belgium
- Correspondence: (D.B.); (P.K.); (O.G.)
| | - Olga Golubnitschaja
- European Association for Predictive, Preventive and Personalised Medicine, EPMA, 1150 Brussels, Belgium
- Predictive, Preventive, Personalised (3P) Medicine, Department of Radiation Oncology, University Hospital Bonn, Rheinische Friedrich-Wilhelms-Universität Bonn, 53127 Bonn, Germany
- Correspondence: (D.B.); (P.K.); (O.G.)
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