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Sha B, Sun Y, Zhao S, Li M, Huang W, Li Z, Shi J, Han X, Li P, Hu T, Chen P. USP8 inhibitor-induced DNA damage activates cell cycle arrest, apoptosis, and autophagy in esophageal squamous cell carcinoma. Cell Biol Toxicol 2023; 39:2011-2032. [PMID: 35022897 DOI: 10.1007/s10565-021-09686-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Accepted: 11/29/2021] [Indexed: 12/16/2022]
Abstract
Increasing evidence suggests that targeting ubiquitin-specific peptidase 8 (USP8) serves as an attractive anti-cancer strategy. However, the role of USP8 inhibitor, DUB-IN-1, in esophageal squamous cell carcinoma (ESCC) cells still needs to be explored. Here, immunohistochemistry was employed to examine the expression of USP8 in ESCC tissues. Cell Counting Kit-8 (CCK-8) was used to evaluate cell proliferation ability, and propidium iodide (PI) was selected to test the effect of DUB-IN-1 on cell cycle. AnnexinV-FITC/PI staining and the activity of caspase 3 were detedcted to evaluate apoptosis. Transmission electron microscope, microtubule-associated protein 1 light-chain 3 (LC3) expression, and acridine orange (AO) staining were selected to check if there was autophagy. Comet assay and γ-H2AX immunofluorescence was used to monitor DNA damage. Rescue experiment was used to determine the key role of of p53 in cell cycle, apoptosis, and autophagy. Results revealed that the leve of USP8 was higher in ESCC tissues than that in tissues adjacent to carcinoma. DUB-IN-1, an USP8 inhibitor, caused DNA damage, led to G2/M phase block by p53-p21 axis, and triggered apoptosis by regulating the p53 target proteins including Bax, Noxa, and Puma. Besides, DUB-IN-1 could stimulate autophagy through p53-dependent adenosine 5'-monophosphate (AMP)-activated protein kinase (AMPK) activation. Taken together, this study revealed the cytotoxic effects and the mechanism of DUB-IN-1, which indicated that DUB-IN-1 may be a novel inhibitor targeting USP8 that can kill ESCC cells. USP8 inhibitor, DUB-IN-1, treatment could inhibit esophageal squamous cell carcinoma cell growth and induce G2/M cell cycle arrest, apoptosis, and autophagy by DNA damage-induced p53 activation. DUB-IN-1 treatment led to G2/M cell cycle arrest by upregulating the protein level of p21 and triggered apoptosis by modulating the p53 target proteins including Bax, Noxa, and Puma. Meanwhile, DUB-IN-1 treatment stimulated protective autophagy through p53-dependent AMPK activation. Collectively, these findings suggested that DNA damage-triggered p53 activation, p53-Puma/Noxa/Bax, p53-p21, and p53-AMPK pathways were all involved in the effect of DUB-IN-1.
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Affiliation(s)
- Beibei Sha
- Academy of Medical Sciences, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, 450001, China
| | - Yaxin Sun
- Academy of Medical Sciences, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, 450001, China
| | - Shan Zhao
- Academy of Medical Sciences, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, 450001, China
| | - Miaomiao Li
- Academy of Medical Sciences, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, 450001, China
| | - Wenjing Huang
- Academy of Medical Sciences, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, 450001, China
| | - Zheng Li
- The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, 450052, China
| | - Jianxiang Shi
- Precision Medicine Center, Henan Institute of Medical and Pharmaceutical Sciences & BGI College, Zhengzhou University, Zhengzhou, 450052, China
| | - Xuefei Han
- Academy of Medical Sciences, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, 450001, China
| | - Pei Li
- Academy of Medical Sciences, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, 450001, China
| | - Tao Hu
- Academy of Medical Sciences, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, 450001, China.
| | - Ping Chen
- Academy of Medical Sciences, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, 450001, China.
- Henan Key Laboratory of Precision Clinical Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China.
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2
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Chen X, Abdallah MF, Grootaert C, Van Nieuwerburgh F, Rajkovic A. New insights into the combined toxicity of aflatoxin B1 and fumonisin B1 in HepG2 cells using Seahorse respirometry analysis and RNA transcriptome sequencing. ENVIRONMENT INTERNATIONAL 2023; 175:107945. [PMID: 37126917 DOI: 10.1016/j.envint.2023.107945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 04/08/2023] [Accepted: 04/19/2023] [Indexed: 05/03/2023]
Abstract
Aflatoxin B1 (AFB1) and fumonisin B1 (FB1) are widely (co-)detected in food and known for their hepatotoxicity in humans. Still, their combined toxicity needs to be investigated, especially the impact on mitochondria. In our previous work, we examined the effect of short-term exposure to different doses of AFB1, FB1, and their binary mixture (MIX) on the bioenergetic status of HepG2 cells, a well-recognized in vitro model system for studying liver cell function. In the current work, we further investigated the (combined) effect of AFB1 and FB1 on the mitochondrial and glycolytic activity of HepG2 cells using Seahorse respirometry analysis and RNA transcriptome sequencing. The results showed that the co-exposure, especially at high doses, is more toxic due to a more inhibition of all parameters of mitochondrial respiration. However, FB1 contributes more to the MIX effects than AFB1. RNA transcriptome sequencing showed that the p53 signaling pathway, a major orchestrator of mitochondrial apoptosis, was differentially expressed. Moreover, the co-exposure significantly downregulated the genes encoding for Complexes I, II, III, and IV, representing the onset of the suppressed mitochondrial respiration in HepG2 cells.
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Affiliation(s)
- Xiangrong Chen
- Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium.
| | - Mohamed F Abdallah
- Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium; Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt
| | - Charlotte Grootaert
- Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Filip Van Nieuwerburgh
- Laboratory of Pharmaceutical Biotechnology, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium
| | - Andreja Rajkovic
- Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium.
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3
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Furtado A, Esgalhado AJ, Duarte AC, Costa AR, Costa-Brito AR, Carro E, Ishikawa H, Schroten H, Schwerk C, Gonçalves I, Arosa FA, Santos CRA, Quintela T. Circadian rhythmicity of amyloid-beta-related molecules is disrupted in the choroid plexus of a female Alzheimer's disease mouse model. J Neurosci Res 2023; 101:524-540. [PMID: 36583371 DOI: 10.1002/jnr.25164] [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: 08/12/2022] [Revised: 11/20/2022] [Accepted: 12/18/2022] [Indexed: 12/31/2022]
Abstract
The choroid plexus (CP) is part of the blood-cerebrospinal fluid barrier (BCSFB) and was recently described as an important component of the circadian clock system. It is the principal source of cerebrospinal fluid (CSF) and responsible for the synthesis and secretion of various neuroprotective peptides including those involved in amyloid-β (Aβ) transport/degradation, contributing to Aβ homeostasis. Inadequate Aβ metabolic clearance and transport across the BCSFB have been associated with circadian dysfunctions in Alzheimer's disease (AD) patients. To investigate whether AD pathology influences Aβ scavengers circadian expression, we collected CP at different time points from an AD mouse model (APP/PS1) (female and male animals, aged 6- and 12-months-old) and analyzed their mRNA expression by Real-time RT-PCR. Only angiotensin-converting enzyme (Ace) expression in 6-month-old female wild-type mice and transthyretin (Ttr) expression in 12-month-old female wild-type mice presented significant rhythmicity. The circadian rhythmicity of Ace and Ttr, prompt us to analyze the involvement of circadian rhythm in Aβ uptake. A human CP papilloma (HIBCPP) cell line was incubated with Aβ-488 and uptake was evaluated at different time points using flow cytometry. Aβ uptake displayed circadian rhythmicity. Our results suggest that AD might affect Aβ scavengers rhythmicity and that Aβ clearance is a rhythmic process possibly regulated by the rhythmic expression of Aβ scavengers.
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Affiliation(s)
- André Furtado
- CICS-UBI, Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal
| | - André J Esgalhado
- CICS-UBI, Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal
| | - Ana C Duarte
- CICS-UBI, Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal.,UDI-IPG- Unidade de Investigação para o Desenvolvimento do Interior, Instituto Politécnico da Guarda, Guarda, Portugal
| | - Ana R Costa
- CICS-UBI, Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal
| | - Ana R Costa-Brito
- CICS-UBI, Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal
| | - Eva Carro
- Networked Biomedical Research Center in Neurodegenerative Diseases (CIBERNED), Madrid, Spain.,Group of Neurodegenerative Diseases, Hospital 12 de Octubre Research Institute (imas12), Madrid, Spain
| | - Hiroshi Ishikawa
- Laboratory of Clinical Regenerative Medicine, Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Horst Schroten
- Mannheim Medical Faculty, University of Heidelberg, Childrens Hospital, Mannheim, Germany
| | - Christian Schwerk
- Mannheim Medical Faculty, University of Heidelberg, Childrens Hospital, Mannheim, Germany
| | - Isabel Gonçalves
- CICS-UBI, Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal
| | - Fernando A Arosa
- CICS-UBI, Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal
| | - Cecília R A Santos
- CICS-UBI, Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal
| | - Telma Quintela
- CICS-UBI, Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal.,UDI-IPG- Unidade de Investigação para o Desenvolvimento do Interior, Instituto Politécnico da Guarda, Guarda, Portugal
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4
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Zheng Y, Wang L, Niu X, Guo Y, Zhao J, Li L, Zhao J. EOAI, a ubiquitin-specific peptidase 5 inhibitor, prevents non-small cell lung cancer progression by inducing DNA damage. BMC Cancer 2023; 23:28. [PMID: 36611139 PMCID: PMC9826599 DOI: 10.1186/s12885-023-10506-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 01/02/2023] [Indexed: 01/08/2023] Open
Abstract
OBJECTIVE Targeting deubiquitinases (DUBs) has emerged as a promising avenue for anticancer drug development. However, the effect and mechanism of pan-DUB inhibitor EOAI on non-small cell lung cancer (NSCLC) remains to be studied. MATERIALS AND METHODS The expression of ubiquitin-specific peptidase 5 (USP5) in NSCLC was evaluated by immunohistochemistry. The effect of the USP5 inhibitor, EOAI, on NSCLC cell growth and cell cycle was evaluated by CCK-8 and PI staining. Apoptosis was detected by Annexin V-FITC/PI double staining. Autophagy was examined by LC3 immunofluorescence. Comet assay and γ-H2AX immunofluorescence staining were used to detect DNA damage, and Western blotting was used to detect the expression of apoptosis, cycle, autophagy and DNA damage-related proteins. In vivo experiments demonstrated the effect of EOAI on NSCLC. RESULTS We also found that USP5 was significantly upregulated in NSCLC tissues in this study. In addition, we show that EOAI can cause DNA damage in NSCLC cells while modulating the transcriptional activity of P53, thereby inducing cell cycle arrest in NSCLC cells, autophagy and apoptosis. In vivo experiments have shown that EOAI can inhibit tumors and synergistically enhance the anti-tumor effect of cisplatin. CONCLUSION USP5-mediated epigenetic regulation of oncogenes promotes the occurrence of NSCLC, which provides ideas for developing potential targeted therapy.
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Affiliation(s)
- Yuanyuan Zheng
- grid.412633.10000 0004 1799 0733Internet Medical and System Applications of National Engineering Laboratory, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052 Henan China
| | - Longhao Wang
- grid.412633.10000 0004 1799 0733Internet Medical and System Applications of National Engineering Laboratory, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052 Henan China
| | - Xiaoyu Niu
- grid.414008.90000 0004 1799 4638Department of Anesthesiology, the Affiliated Cancer Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, 450008 Henan China
| | - Yongjun Guo
- grid.414008.90000 0004 1799 4638Department of Molecular Pathology, the Affiliated Cancer Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, 450008 Henan China ,Henan Key Laboratory of Molecular Pathology, Zhengzhou, 450008 Henan China
| | - Jiuzhou Zhao
- grid.414008.90000 0004 1799 4638Department of Molecular Pathology, the Affiliated Cancer Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, 450008 Henan China ,Henan Key Laboratory of Molecular Pathology, Zhengzhou, 450008 Henan China
| | - Lifeng Li
- grid.412633.10000 0004 1799 0733Internet Medical and System Applications of National Engineering Laboratory, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052 Henan China
| | - Jie Zhao
- grid.412633.10000 0004 1799 0733Internet Medical and System Applications of National Engineering Laboratory, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052 Henan China ,grid.412633.10000 0004 1799 0733Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052 Henan China
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5
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Kim SW, Kim YJ, Im GB, Kim YH, Jeong GJ, Cho SM, Lee H, Bhang SH. Phototoxicity-free blue light for enhancing therapeutic angiogenic efficacy of stem cells. Cell Biol Toxicol 2021; 39:217-236. [PMID: 34580808 DOI: 10.1007/s10565-021-09656-3] [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: 03/30/2021] [Accepted: 09/10/2021] [Indexed: 11/28/2022]
Abstract
Low-level light therapy (LLLT) is a safe and noninvasive technique that has drawn attention as a new therapeutic method to treat various diseases. However, little is known so far about the effect of blue light for LLLT due to the generation of reactive oxygen species (ROS) that can cause cell damage. We introduced a blue organic light-emitting diode (bOLED) as a safe and effective light source that could generate a low amount of heat and luminance compared to conventional light sources (e.g., light-emitting diodes). We compared phototoxicity of bOLED light with different light fluences to human adipose-derived stem cells (hADSC). We further explored molecular mechanisms involved in the therapeutic efficacy of bOLED for enhancing angiogenic properties of hADSC, including intracellular ROS control in hADSCs. Using optimum conditions of bOLED light proposed in this study, photobiomodulation and angiogenic properties of hADSCs were enhanced. These findings might open new methods for using blue light in LLLT. Such methods can be implemented in future treatments for ischemic disease.
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Affiliation(s)
- Sung-Won Kim
- School of Chemical Engineering, Sungkyunkwan University, Suwon, Gyeonggi, 16419, Republic of Korea
| | - Yu-Jin Kim
- School of Chemical Engineering, Sungkyunkwan University, Suwon, Gyeonggi, 16419, Republic of Korea
| | - Gwang-Bum Im
- School of Chemical Engineering, Sungkyunkwan University, Suwon, Gyeonggi, 16419, Republic of Korea
| | - Yeoung Hwan Kim
- School of Chemical Engineering, Sungkyunkwan University, Suwon, Gyeonggi, 16419, Republic of Korea
| | - Gun-Jae Jeong
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA
| | - Sung Min Cho
- School of Chemical Engineering, Sungkyunkwan University, Suwon, Gyeonggi, 16419, Republic of Korea
| | - Haeshin Lee
- Department of Chemistry, Center for Nature-inspired Technology (CNiT), Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Suk Ho Bhang
- School of Chemical Engineering, Sungkyunkwan University, Suwon, Gyeonggi, 16419, Republic of Korea.
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6
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Qi Z, Yang G, Deng T, Wang J, Zhou H, Popov SA, Shults EE, Wang C. Design and linkage optimization of ursane-thalidomide-based PROTACs and identification of their targeted-degradation properties to MDM2 protein. Bioorg Chem 2021; 111:104901. [PMID: 33878647 DOI: 10.1016/j.bioorg.2021.104901] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 03/08/2021] [Accepted: 04/05/2021] [Indexed: 02/07/2023]
Abstract
Ursolic acid (UA) is an accessible triterpenoid, widely applied in the design and synthesis of antitumor compounds. However, the mechanism of its anti-tumor effect is still unclear. To verify the molecular mechanism of its biological activity, based on the bifunctional activity of ubiquitination and subsequent proteasomal degradation of the target protein of the proteolysis-targeting chimeras (PROTACs) strategy, here we report the design, synthesis and cellular activity of six UA PROTAC hydrochloride compounds 1A-1F, in which UA acts as the binding ligand of the PROTAC and is linked to thalidomide (E3 ligand) through a series of synthetic linkers. The results revealed that compound 1B, connected with a POE-3 (3-Polyoxyether) possessed remarkable in vitro antitumor activity (with the IC50 value of 0.23 ~ 0.39 μM against A549, Huh7, HepG2). WB results demonstrated that the administration of compound 1B induced significant degradation of MDM2 (only 25% to that of SM1), and promoted the expression of P21 and PUMA proteins, and thus inhibited the proliferation (77.67% of 1B vs 60.37% of CON in G1 phase) and promoted the apoptosis (26.74% of 1B vs 3.35% of CON) of A549 cells. This work demonstrated proof of designing the efficient target protein degradation by UA PROTACs with the POE linkers. In addition, we confirmed that UA possess the characteristic of targeted-binding the protein of murine double minute-2 protein (MDM2). This will lay a foundation for the comprehensive utilization of forest natural compound UA.
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Affiliation(s)
- Zhiwen Qi
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forest, Nanjing 210042, Jiangsu, PR China.
| | - Guliang Yang
- National Engineering Laboratory for Rice and By-products Processing, Food Science and Engineering College, Central South University of Forestry and Technology, Changsha 410004, Hunan, PR China.
| | - Tao Deng
- Institute of Tropical Medicine & the Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou 501405, PR China
| | - Jianmin Wang
- School of Computer Science and Engineering, Hunan University, Changsha 410012, PR China
| | - Hao Zhou
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forest, Nanjing 210042, Jiangsu, PR China
| | - Sergey A Popov
- Novosibirsk Institute of Organic Chemistry, Acad. Lavrentyev ave. 9, Novosibirsk 630090, Russia
| | - Elvira E Shults
- Novosibirsk Institute of Organic Chemistry, Acad. Lavrentyev ave. 9, Novosibirsk 630090, Russia
| | - Chengzhang Wang
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forest, Nanjing 210042, Jiangsu, PR China.
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7
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Wang A J, Zhang J, Xiao M, Wang S, Wang B J, Guo Y, Tang Y, Gu J. Molecular mechanisms of doxorubicin-induced cardiotoxicity: novel roles of sirtuin 1-mediated signaling pathways. Cell Mol Life Sci 2021; 78:3105-3125. [PMID: 33438055 PMCID: PMC11072696 DOI: 10.1007/s00018-020-03729-y] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 11/16/2020] [Accepted: 12/04/2020] [Indexed: 02/07/2023]
Abstract
Doxorubicin (DOX) is an anthracycline chemotherapy drug used in the treatment of various types of cancer. However, short-term and long-term cardiotoxicity limits the clinical application of DOX. Currently, dexrazoxane is the only approved treatment by the United States Food and Drug Administration to prevent DOX-induced cardiotoxicity. However, a recent study found that pre-treatment with dexrazoxane could not fully improve myocardial toxicity of DOX. Therefore, further targeted cardioprotective prophylaxis and treatment strategies are an urgent requirement for cancer patients receiving DOX treatment to reduce the occurrence of cardiotoxicity. Accumulating evidence manifested that Sirtuin 1 (SIRT1) could play a crucially protective role in heart diseases. Recently, numerous studies have concentrated on the role of SIRT1 in DOX-induced cardiotoxicity, which might be related to the activity and deacetylation of SIRT1 downstream targets. Therefore, the aim of this review was to summarize the recent advances related to the protective effects, mechanisms, and deficiencies in clinical application of SIRT1 in DOX-induced cardiotoxicity. Also, the pharmaceutical preparations that activate SIRT1 and affect DOX-induced cardiotoxicity have been listed in this review.
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Affiliation(s)
- Jie Wang A
- School of Nursing, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Jingjing Zhang
- Department of Cardiology, The First Hospital of China Medical University, Shenyang, 110016, Liaoning, China
- Department of Cardiology, The People's Hospital of Liaoning Province, Shenyang, 110016, Liaoning, China
| | - Mengjie Xiao
- School of Nursing, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Shudong Wang
- Department of Cardiology, The First Hospital of Jilin University, Changchun, 130021, Jilin, China
| | - Jie Wang B
- School of Nursing, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Yuanfang Guo
- School of Nursing, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Yufeng Tang
- Department of Orthopedic Surgery, The First Affiliated Hospital of Shandong First Medical University, Jinan, 250014, Shandong, China
| | - Junlian Gu
- School of Nursing, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China.
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8
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Fang X, Hu T, Yin H, Yang J, Tang W, Hu S, Xu X. Differences in telomerase activity and the effects of AZT in aneuploid and euploid cells in colon cancer. Int J Oncol 2017. [PMID: 28627647 DOI: 10.3892/ijo.2017.4043] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Telomerase-targeted treatments for cancer have received a great deal of attention because telomerase is detected in nearly all cancer cells but is not expressed in most normal tissues. Aneuploidy refers to a chromosome number that is not a multiple of the base chromosome number and can indicate either hypo- or hyperploid chromosome numbers. Most solid tumors are aneuploid. In the present study, we sought to determine whether there are differences in telomerase activity and hTERT gene expression between aneuploid and euploid cells. Furthermore, we investigated telomerase inhibitor 3'-azido-3'-deoxythymidine (AZT)-induced cell apoptosis using the p53-Puma/Noxa/Bax pathway and cell cycle arrest using the p53-p21 pathway in both aneuploid and euploid cells. Our results demonstrate that telomerase activity and hTERT gene expression were higher in aneuploid than in euploid cells. In addition, AZT exerted time- and dose-dependent cytotoxic effects on both aneuploid and euploid cells, and aneuploid cells were more sensitive to AZT-induced cytotoxicity. In addition, both the p53-Puma/Noxa/Bax pathway and the cell cycle arrest-associated p53-p21 pathway were involved in the AZT-induced suppression of tumor cells. Importantly, aneuploid cells were more sensitive to AZT-induced cell cycle arrest (p53-p21) and DNA double-strand breaks (γ-H2AX), while euploid cells were more sensitive to AZT-induced apoptosis (p53-Puma/Bax/Noxa).
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Affiliation(s)
- Xiao Fang
- Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China
| | - Tenghui Hu
- Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China
| | - Hua Yin
- Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China
| | - Junjun Yang
- Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China
| | - Weian Tang
- Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China
| | - Siqi Hu
- Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China
| | - Xingxiang Xu
- Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China
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9
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Qian ZQ, Wang YW, Li YL, Li YQ, Ling-Zhu, Yang DL. Icariin prevents hypertension-induced cardiomyocyte apoptosis through the mitochondrial apoptotic pathway. Biomed Pharmacother 2017; 88:823-831. [DOI: 10.1016/j.biopha.2017.01.147] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 01/23/2017] [Accepted: 01/26/2017] [Indexed: 12/17/2022] Open
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10
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A novel tumor suppressor gene in basal cell carcinoma: inhibition of growth factor-2. Tumour Biol 2015; 36:4611-6. [PMID: 25613071 DOI: 10.1007/s13277-015-3108-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Accepted: 01/14/2015] [Indexed: 01/02/2023] Open
Abstract
In loss of heterozygosity (LOH) studies at the chromosome 4q22-35 region, it was shown that the amount of deletion was high in basal cell carcinoma (BCC). It has been proposed that genes located in this chromosomal region could be tumor suppressor genes in BCC. It has been thought that deletions in the ING2 gene located in the same region can play a role in the pathophysiology of BCC and that deletions occurring in this region may influence the level of ING2 expression in BCC. Tumoral and non-tumoral tissues from 75 patients with BCC (45 men and 30 women) were included to the study. Lesions were excised by a surgical margin of 0.5 cm. After excision, RNA was isolated from tumoral and non-tumoral tissue samples. ING2 messenger RNA (mRNA) expression level was determined in tumoral and non-tumoral tissues by the real-time polymerase chain reaction (RT-PCR). It was detected that ING2 mRNA expression level decreased in tumoral tissues when compared to non-tumoral tissues from BCC patients (p = 0.0001). It was found that expression levels of this gene were comparable among patients with primary, recurrent, or multiple BCC. It is thought that ING2 gene expression level could contribute to the development of BCC but not be associated with the stage and the prognosis of the tumor.
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11
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Zhang W, Liu N, Wang X, Jin X, Du H, Peng G, Xue J. Benzo(a)pyrene-7,8-diol-9,10-epoxide induced p53-independent necrosis via the mitochondria-associated pathway involving Bax and Bak activation. Hum Exp Toxicol 2014; 34:179-90. [PMID: 24837741 DOI: 10.1177/0960327114533358] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Benzo(a)pyrene-7,8-diol-9,10-epoxide (BPDE) is a highly reactive DNA damage agent and can induce cell death through both p53-independent and -dependent pathways. However, little is known about the molecular mechanisms of p53-independent pathways in BPDE-induced cell death. To understand the p53-independent mechanisms, we have now examined BPDE-induced cytotoxicity in p53-deficient baby mouse kidney (BMK) cells. The results showed that BPDE could induce Bax and Bak activation, cytochrome c release, caspases activation, and necrotic cell death in the BMK cells. Bax and Bak, two key molecules of mitochondrial permeability transition pore, were interdependently activated by BPDE, with Bax and Bak translocation to and Bax/Bak homo-oligomerization in mitochondria, release of cytochrome c was induced. Importantly, cytochrome c release and necrotic cell death were diminished in BMK cells (Bax−/−), BMK cells (Bak−/−), and BMK cells (Bax−/−/Bak−/−). Furthermore, overexpression of Bcl-2 could ameliorate BPDE-induced cytochrome c release and necrosis. Together the findings suggested that BPDE-induced necrosis was modulated by the p53-independent pathway, which was related to the translocation of Bax and Bak to mitochondria, release of cytochrome c, and activation of caspases.
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Affiliation(s)
- W Zhang
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - N Liu
- Department of General Surgery, Hainan Provincial People Hospital, Haikou, China
| | - X Wang
- Department of Vascular Surgery, Xuzhou Central Hospital, Xuzhou, China
| | - X Jin
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - H Du
- Department of General Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - G Peng
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - J Xue
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Adenovirus-mediated tissue-targeted expression of the CDglyTk gene for the treatment of breast cancer. Mol Med Rep 2012; 6:321-9. [PMID: 22641384 DOI: 10.3892/mmr.2012.925] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2012] [Accepted: 05/10/2012] [Indexed: 11/05/2022] Open
Abstract
The aim of this study was to evaluate the selective killing efficacy of adenovirus (Ad)-mediated double suicide genes driven by the kinase domain-containing receptor (KDR) promoter in human breast cancer cells and vascular endothelial cells. Two Ad-mediated double suicide gene systems [with the two suicide genes, thymidine kinase (TK) and cytosine deaminase (CD)] with the KDR promoter (Ad-KDRP-CDglyTK) and the cytomegalovirus (CMV) promoter (Ad-CMV-CDglyTK) were established and transfected into the KDR-expressing MCF7 human breast cancer, EC304 human vascular endothelial and LS174T human colon carcinoma, which does not express KDR, cell lines. The selective killing efficiency and specificity of the double suicide gene system were measured in vitro by the analysis of cellular proliferation and assayed in vivo by subcutaneous injection of MCF7 cells into nude mice. The microvessel density (MVD) in the transplanted tumor was determined by immunohistochemical staining of CD34 cells. Our results showed that the transgenic CDglyTK genes were expressed in three cell lines (MCF7, ECV304 and LS174T) infected with Ad-CMV-CDglyTK. However, of the cells infected with Ad-KDRP-CDglyTK, the transgenic CDglyTK gene was only expressed in the KDR-expressing MCF7 and ECV304 cells, but not in the KDR-deficient LS174T cells. Cell proliferation was significantly reduced in a dose-dependent manner by pre-treatment with ganciclovir (GCV) and 5-fluorocytosine (5-FC) in MCF7 and ECV304 cells with transfected KDRP-CDglyTK genes and the three cell lines transfected with the CMV-CDglyTK genes. Similar results were not observed in the LS174T cells with transfected KDRP-CDglyTK genes. The results of this study show that the tumor-targeted expression of CDglyTK driven by the KDR promoter has a high specificity and performance. The killing effect of the CD/TK fusion gene in the target cells was significantly increased compared with the single suicide gene. The cell cycle of MCF7 and ECV304 cells transfected with KDRP-CDglyTK genes was arrested at the S phase following treatment with the prodrugs. The tumors formed by the MCF7 cells with the double suicide gene system were much smaller and the MVD of the tumor tissue was significantly decreased compared with the control. This study demonstrates that tumor‑targeted expression of the CDglyTK gene driven by the KDR promotor may be a novel strategy for the gene therapy of human breast cancer.
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Choudhuri T, Murakami M, Kaul R, Sahu SK, Mohanty S, Verma SC, Kumar P, Robertson ES. Nm23-H1 can induce cell cycle arrest and apoptosis in B cells. Cancer Biol Ther 2010; 9:1065-78. [PMID: 20448457 DOI: 10.4161/cbt.9.12.11995] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Nm23-H1 is a well-known tumor metastasis suppressor, which functions as a nucleoside-diphosphate kinase converting nucleoside diphosphates to nucleoside triphosphates with an expense of ATP. It regulates a variety of cellular activities, including proliferation, development, migration and differentiation known to be modulated by a series of complex signaling pathway. Few studies have addressed the mechanistic action of Nm23-H1 in the context of these cellular processes. To determine the downstream pathways modulated by Nm23-H1, we expressed Nm23-H1 in a Burkitt lymphoma derived B-cell line BJAB and performed pathway specific microarray analysis. The genes with significant changes in expression patterns were clustered in groups which are responsible for regulating cell cycle, p53 activities and apoptosis. We found a general reduction of cell cycle regulatory proteins including cyclins and cyclin dependent kinase inhibitors (anti proliferation), and upregulation of apoptotic genes which included caspase 3, 9 and Bcl-x. Nm23-H1 was also found to upregulate p53 and downregulate p21 expression. A number of these genes were validated by real time PCR and results from promoter assays indicated that Nm23-H1 expression downregulated cyclin D1 in a dose responsive manner. Further, we show that Nm23-H1 forms a complex with the cellular transcription factor AP1 to modulate cyclin D1 expression levels. BJAB cells expressing Nm23-H1 showed reduced proliferation rate and were susceptible to increased apoptosis which may in part be due to a direct interaction between Nm23-H1 and p53. These results suggest that Nm23-H1 may have a role in the regulation of cell cycle and apoptosis in human B-cells.
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Affiliation(s)
- Tathagata Choudhuri
- Division of Infectious Disease Biology, Institute of Life Sciences, Bhubaneswar, India
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