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Wei X, Zhou Y, Shao E, Shi X, Han Y, Zhang Y, Wei G, Zheng H, Huang S, Chen Y, Sun J, Liao Y, Liao W, Wang Y, Bin J, Li X. Tert promotes cardiac regenerative repair after MI through alleviating ROS-induced DNA damage response in cardiomyocyte. Cell Death Discov 2024; 10:381. [PMID: 39187478 PMCID: PMC11347641 DOI: 10.1038/s41420-024-02135-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 07/28/2024] [Accepted: 08/06/2024] [Indexed: 08/28/2024] Open
Abstract
Telomerase reverse transcriptase (Tert) has been found to have a protective effect on telomeric DNA, but whether it could improve the repair of reactive oxygen species (ROS)-induced DNA damage and promote myocardial regenerative repair after myocardial infarction (MI) by protecting telomeric DNA is unclear. The immunofluorescence staining with TEL-CY3 and the TeloTAGGG Telomerase PCR ELISA kit were used to show the telomere length and telomerase activity. The heart-specific Tert-deletion homozygotes were generated by using commercial Cre tool mice and flox heterozygous mice for mating. We measured the telomere length and telomerase activity of mouse cardiomyocytes (CMs) at different days of age, and the results showed that they were negatively correlated with age. Overexpressed Tert could enhance telomerase activity and lengthen telomeres, thereby repairing the DNA damage induced by ROS and promoting CM proliferation in vitro. The in vivo results indicated that enhanced Tert could significantly improve cardiac function and prognosis by alleviating CM DNA damage and promoting angiogenesis post-MI. In terms of mechanism, DNA pulldown assay was used to identify that nuclear ribonucleoprotein A2B1 (hnRNPA2B1) could be an upstream regulator of Tert in CMs. Overexpressed Tert could activate the NF-κB signaling pathway in CMs and bind to the VEGF promoter in the endothelium to increase the VEGF level. Further immunoblotting showed that Tert protected DNA from ROS-induced damage by inhibiting ATM phosphorylation and blocking the Chk1/p53/p21 pathway activation. HnRNPA2B1-activated Tert could repair the ROS-induced telomeric DNA damage to induce the cell cycle re-entry in CMs and enhance the interaction between CMs and endothelium, thus achieving cardiac regenerative repair after MI.
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Affiliation(s)
- Xiaomin Wei
- Department of Cardiology, State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Cardiovascular Center, the Sixth Affiliated Hospital, School of Medicine, South China University of Technology, Foshan, China
- Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation, Guangzhou, China
| | - Yilin Zhou
- Department of Cardiology, State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation, Guangzhou, China
| | - Enge Shao
- Department of Cardiology, State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation, Guangzhou, China
| | - Xiaoran Shi
- Department of Cardiology, State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation, Guangzhou, China
| | - Yuan Han
- Department of Cardiology, State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation, Guangzhou, China
| | - Yeshen Zhang
- Department of Cardiology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Guoquan Wei
- Department of Cardiology, State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation, Guangzhou, China
| | - Hao Zheng
- Department of Cardiology, State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation, Guangzhou, China
| | - Senlin Huang
- Department of Cardiology, State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation, Guangzhou, China
| | - Yanmei Chen
- Department of Cardiology, State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation, Guangzhou, China
| | - Jie Sun
- Department of Cardiology, Zhongshan City People's Hospital, Zhongshan, China
| | - Yulin Liao
- Department of Cardiology, State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Cardiovascular Center, the Sixth Affiliated Hospital, School of Medicine, South China University of Technology, Foshan, China
- Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation, Guangzhou, China
| | - Wangjun Liao
- Cardiovascular Center, the Sixth Affiliated Hospital, School of Medicine, South China University of Technology, Foshan, China
- Department of Oncology, the Sixth Affiliated Hospital, School of Medicine, South China University of Technology, Foshan, China
| | - Yanbing Wang
- Department of Cardiology, State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou, China.
- Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation, Guangzhou, China.
| | - Jianping Bin
- Department of Cardiology, State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou, China.
- Cardiovascular Center, the Sixth Affiliated Hospital, School of Medicine, South China University of Technology, Foshan, China.
- Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation, Guangzhou, China.
| | - Xinzhong Li
- Department of Cardiology, State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, Guangzhou, China.
- Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation, Guangzhou, China.
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2
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Frazzi R. KLF4 is an epigenetically modulated, context-dependent tumor suppressor. Front Cell Dev Biol 2024; 12:1392391. [PMID: 39135777 PMCID: PMC11317372 DOI: 10.3389/fcell.2024.1392391] [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: 02/27/2024] [Accepted: 07/01/2024] [Indexed: 08/15/2024] Open
Abstract
The epigenetic layer of regulation has become increasingly relevant in the research focused on tumor suppressors. KLF4 is a well-described zinc-finger transcription factor, mainly known for its role in the acquisition of cell pluripotency. Here we report and describe the most relevant epigenetic regulation mechanisms that affect KLF4 expression in tumors. CpG island methylation emerges as the most common mechanism in several tumors including lung adenocarcinoma, hepatocellular carcinoma, non-Hodgkin lymphomas, among others. Further layers of regulation represented by histone methylation and acetylation and by non-coding RNAs are described. Overall, KLF4 emerges as a crucial target in the fight against cancer.
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Affiliation(s)
- Raffaele Frazzi
- Molecular Pathology Laboratory, Azienda Unità Sanitaria Locale–IRCCS di Reggio Emilia, Reggio Emilia, Italy
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3
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Singh MK, Rallabandi HR, Zhou XJ, Qi YY, Zhao ZZ, Gan T, Zhang H, Looger LL, Nath SK. KLF2 enhancer variant rs4808485 increases lupus risk by modulating inflammasome machinery and cellular homoeostasis. Ann Rheum Dis 2024; 83:879-888. [PMID: 38373841 PMCID: PMC11168881 DOI: 10.1136/ard-2023-224953] [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: 09/01/2023] [Accepted: 02/01/2024] [Indexed: 02/21/2024]
Abstract
OBJECTIVE A recent genome-wide association study linked KLF2 as a novel Asian-specific locus for systemic lupus erythematosus (SLE) susceptibility. However, the underlying causal functional variant(s), cognate target gene(s) and genetic mechanisms associated with SLE risk are unknown. METHODS We used bioinformatics to prioritise likely functional variants and validated the best candidate with diverse experimental techniques, including genome editing. Gene expression was compared between healthy controls (HCs) and patients with SLE with or without lupus nephritis (LN+, LN-). RESULTS Through bioinformatics and expression quantitative trait locus analyses, we prioritised rs4808485 in active chromatin, predicted to modulate KLF2 expression. Luciferase reporter assays and chromatin immunoprecipitation-qPCR demonstrated differential allele-specific enhancer activity and binding of active histone marks (H3K27ac, H3K4me3 and H3K4me1), Pol II, CTCF, P300 and the transcription factor PARP1. Chromosome conformation capture-qPCR revealed long-range chromatin interactions between rs4808485 and the KLF2 promoter. These were directly validated by CRISPR-based genetic and epigenetic editing in Jurkat and lymphoblastoid cells. Deleting the rs4808485 enhancer in Jurkat (KO) cells disrupted NLRP3 inflammasome machinery by reducing KLF2 and increasing CASPASE1, IL-1β and GSDMD levels. Knockout cells also exhibited higher proliferation and cell-cycle progression than wild type. RNA-seq validated interplay between KLF2 and inflammasome machinery in HC, LN+ and LN-. CONCLUSIONS We demonstrate how rs4808485 modulates the inflammasome and cellular homoeostasis through regulating KLF2 expression. This establishes mechanistic connections between rs4808485 and SLE susceptibility.
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Affiliation(s)
- Manish Kumar Singh
- Arthritis and Clinical Immunology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA
| | - Harikrishna Reddy Rallabandi
- Arthritis and Clinical Immunology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA
| | - Xu-Jie Zhou
- Renal Division, Peking University Institute of Nephrology, Peking University First Hospital, Beijing, China
- Key Laboratory of Renal Disease, Ministry of Health of China, Beijing, China
- Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing, China
| | - Yuan-Yuan Qi
- Department of Nephrology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, China
| | - Zhan-Zheng Zhao
- Department of Nephrology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, China
| | - Ting Gan
- Renal Division, Peking University Institute of Nephrology, Peking University First Hospital, Beijing, China
- Key Laboratory of Renal Disease, Ministry of Health of China, Beijing, China
| | - Hong Zhang
- Renal Division, Peking University Institute of Nephrology, Peking University First Hospital, Beijing, China
- Key Laboratory of Renal Disease, Ministry of Health of China, Beijing, China
| | - Loren L Looger
- Howard Hughes Medical Institute, Department of Neurosciences, University of California San Diego, La Jolla, California, USA
| | - Swapan K Nath
- Arthritis and Clinical Immunology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA
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Ding H, Tong J, Lin H, Ping F, Yao T, Ye Z, Chu J, Yuan D, Wang K, Liu X, Chen F. KLF4 inhibited the senescence-associated secretory phenotype in ox-LDL-treated endothelial cells via PDGFRA/NAMPT/mitochondrial ROS. Aging (Albany NY) 2024; 16:8070-8085. [PMID: 38728249 PMCID: PMC11132013 DOI: 10.18632/aging.205805] [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: 09/25/2023] [Accepted: 04/04/2024] [Indexed: 05/12/2024]
Abstract
BACKGROUND Inflammation is one of the significant consequences of ox-LDL-induced endothelial cell (EC) dysfunction. The senescence-associated secretory phenotype (SASP) is a critical source of inflammation factors. However, the molecular mechanism by which the SASP is regulated in ECs under ox-LDL conditions remains unknown. RESULTS The level of SASP was increased in ox-LDL-treated ECs, which could be augmented by KLF4 knockdown whereas restored by KLF4 knock-in. Furthermore, we found that KLF4 directly promoted PDGFRA transcription and confirmed the central role of the NAPMT/mitochondrial ROS pathway in KLF4/PDGFRA-mediated inhibition of SASP. Animal experiments showed a higher SASP HFD-fed mice, compared with normal feed (ND)-fed mice, and the endothelium of EC-specific KLF4-/- mice exhibited a higher proportion of SA-β-gal-positive cells and lower PDGFRA/NAMPT expression. CONCLUSIONS Our results revealed that KLF4 inhibits the SASP of endothelial cells under ox-LDL conditions through the PDGFRA/NAMPT/mitochondrial ROS. METHODS Ox-LDL-treated ECs and HFD-fed mice were used as endothelial senescence models in vitro and in vivo. SA-β-gal stain, detection of SAHF and the expression of inflammatory factors determined SASP and senescence of ECs. The direct interaction of KLF4 and PDGFRA promotor was analyzed by EMSA and fluorescent dual luciferase reporting analysis.
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Affiliation(s)
- Haoran Ding
- Department of Cardiology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai 200092, China
| | - Jing Tong
- Department of Cardiology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai 200092, China
| | - Hao Lin
- Department of Cardiology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai 200092, China
| | - Fan Ping
- Department of Cardiology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai 200092, China
| | - Tongqing Yao
- Department of Cardiology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai 200092, China
| | - Zi Ye
- Department of Cardiology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai 200092, China
| | - Jiapeng Chu
- Department of Cardiology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai 200092, China
| | - Deqiang Yuan
- Department of Cardiology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai 200092, China
| | - Kangwei Wang
- Department of Cardiology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai 200092, China
| | - Xuebo Liu
- Department of Cardiology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai 200092, China
| | - Fei Chen
- Department of Cardiology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai 200092, China
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5
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Jia Y, Zhao J, Wang C, Meng J, Zhao L, Yang H, Zhao X. HBV DNA polymerase upregulates the transcription of PD-L1 and suppresses T cell activity in hepatocellular carcinoma. J Transl Med 2024; 22:272. [PMID: 38475878 PMCID: PMC10936085 DOI: 10.1186/s12967-024-05069-y] [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: 12/04/2023] [Accepted: 03/06/2024] [Indexed: 03/14/2024] Open
Abstract
BACKGROUND In HBV-associated HCC, T cells often exhibit a state of functional exhaustion, which prevents the immune response from rejecting the tumor and allows HCC to progress. Moreover, polymerase-specific T cells exhibit more severe T-cell exhaustion compared to core-specific T cells. However, whether HBV DNA polymerase drives HBV-specific CD8+ T cell exhaustion in HBV-related HCC remains unclear. METHODS We constructed a Huh7 cell line stably expressing HA-HBV-DNA-Pol and applied co-culture systems to clarify its effect on immune cell function. We also examined how HBV-DNA-Pol modulated PD-L1 expression in HCC cells. In addition, HBV-DNA-Pol transgenic mice were used to elucidate the underlying mechanism of HBV-DNA-Pol/PD-L1 axis-induced T cell exhaustion. RESULTS Biochemical analysis showed that Huh7 cells overexpressing HBV-DNA-Pol inhibited the proliferation, activation, and cytokine secretion of Jurkat cells and that this effect was dependent on their direct contact. A similar inhibitory effect was observed in an HCC mouse model. PD-L1 was brought to our attention during screening. Our results showed that the overexpression of HBV-DNA-Pol upregulated PD-L1 mRNA and protein expression. PD-L1 antibody blockade reversed the inhibitory effect of Huh7 cells overexpressing HBV-DNA-Pol on Jurkat cells. Mechanistically, HBV-DNA-Pol interacts with PARP1, thereby inhibiting the nuclear translocation of PARP1 and further upregulating PD-L1 expression. CONCLUSIONS Our findings suggest that HBV-DNA-Pol can act as a regulator of PD-L1 in HCC, thereby directing anti-cancer immune evasion, which further provides a new idea for the clinical treatment of liver cancer.
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Affiliation(s)
- Yan Jia
- Department of Laboratory Medicine, Tianjin Hospital, Tianjin, 300211, China
| | - Jianing Zhao
- Department of Pathology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050011, China
| | - Chunqing Wang
- Department of Clinical Laboratory Medicine, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Medicine and Health Key Laboratory of Laboratory Medicine, Jinan, 250014, China
| | - Jing Meng
- Department of Clinical Laboratory, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250033, China
| | - Liqing Zhao
- Department of Pediatrics, Zaozhuang Municipal Hospital, Zaozhuang, 277100, China
| | - Hongwei Yang
- Department of Laboratory Medicine, Tianjin Hospital, Tianjin, 300211, China
| | - Xiaoqing Zhao
- Department of Clinical Laboratory, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250033, China.
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6
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Pan X, Zhang W, Wang L, Guo H, Zheng M, Wu H, Weng Q, He Q, Ding L, Yang B. KLF12 transcriptionally regulates PD-L1 expression in non-small cell lung cancer. Mol Oncol 2023; 17:2659-2674. [PMID: 37606530 DOI: 10.1002/1878-0261.13512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 06/30/2023] [Accepted: 08/17/2023] [Indexed: 08/23/2023] Open
Abstract
Recent studies have pointed to the role of Krüpple-like factor 12 (KLF12) in cancer-associated processes, including cancer proliferation, apoptosis, and metastasis. However, the role of KLF12 in tumor immunity remains obscure. Here, we found that KLF12 expression was significantly higher in non-small cell lung cancer (NSCLC) cells with higher programmed death-ligand 1 (PD-L1) expression. Additionally, a positive correlation between KLF12 and PD-L1 was observed in clinical patient tumor tissues. By chromatin immunoprecipitation (ChIP) analysis, KLF12 was identified to bind to the CACCC motif of the PD-L1 promoter. Overexpression of KLF12 promoted PD-L1 transcription, whereas silencing of KLF12 inhibited PD-L1 transcription. Furthermore, signal transducer and activator of transcription 1 (STAT1)- and STAT3-triggered PD-L1 transcription was abolished in the absence of KLF12, and KLF12 knockdown weakened the binding of STAT1 and STAT3 to the PD-L1 promoter. Mechanistically, KLF12 physically interacted with P300, a histone acetyltransferase. In addition, KLF12 silencing reduced P300 binding to the PD-L1 promoter, which subsequently caused decreased acetylation of histone H3. PD-L1 transcription driven by KLF12 overexpression was eliminated by EP300 silencing. In immunocompetent mice, KLF12 knockout inhibited tumor growth and promoted infiltration of CD8+ T cells. However, this phenomenon was not observed in immunodeficient mice. Overall, this study reveals KLF12-mediated transcriptional regulation of PD-L1 in NSCLC; targeting KLF12 may be a potential therapeutic strategy for NSCLC.
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Affiliation(s)
- Xiaohui Pan
- Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
- School of Pharmaceutical Science, Wenzhou Medical University, China
| | - Wenxin Zhang
- Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
- School of Pharmaceutical Science, Wenzhou Medical University, China
| | - Longsheng Wang
- Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Hongjie Guo
- Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Mingming Zheng
- Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Honghai Wu
- Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Qinjie Weng
- Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Qiaojun He
- Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
- The Innovation Institute for Artificial Intelligence in Medicine, Zhejiang University, Hangzhou, China
- Cancer Center of Zhejiang University, Hangzhou, China
| | - Ling Ding
- Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Bo Yang
- Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
- The Innovation Institute for Artificial Intelligence in Medicine, Zhejiang University, Hangzhou, China
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7
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Ponomarev AS, Gilazieva ZE, Solovyova VV, Rizvanov AA. Molecular Mechanisms of Tumor Cell Stemness Modulation during Formation of Spheroids. BIOCHEMISTRY. BIOKHIMIIA 2023; 88:979-994. [PMID: 37751868 DOI: 10.1134/s0006297923070106] [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: 01/31/2023] [Revised: 05/30/2023] [Accepted: 06/07/2023] [Indexed: 09/28/2023]
Abstract
Cancer stem cells (CSCs), their properties and interaction with microenvironment are of interest in modern medicine and biology. There are many studies on the emergence of CSCs and their involvement in tumor pathogenesis. The most important property inherent to CSCs is their stemness. Stemness combines ability of the cell to maintain its pluripotency, give rise to differentiated cells, and interact with environment to maintain a balance between dormancy, proliferation, and regeneration. While adult stem cells exhibit these properties by participating in tissue homeostasis, CSCs behave as their malignant equivalents. High tumor resistance to therapy, ability to differentiate, activate angiogenesis and metastasis arise precisely due to the stemness of CSCs. These cells can be used as a target for therapy of different types of cancer. Laboratory models are needed to study cancer biology and find new therapeutic strategies. A promising direction is three-dimensional tumor models or spheroids. Such models exhibit properties resembling stemness in a natural tumor. By modifying spheroids, it becomes possible to investigate the effect of therapy on CSCs, thus contributing to the development of anti-tumor drug test systems. The review examines the niche of CSCs, the possibility of their study using three-dimensional spheroids, and existing markers for assessing stemness of CSCs.
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Affiliation(s)
- Aleksei S Ponomarev
- Kazan (Volga Region) Federal University, Kazan, Republic of Tatarstan, 420008, Russia
| | - Zarema E Gilazieva
- Kazan (Volga Region) Federal University, Kazan, Republic of Tatarstan, 420008, Russia
| | - Valeriya V Solovyova
- Kazan (Volga Region) Federal University, Kazan, Republic of Tatarstan, 420008, Russia
| | - Albert A Rizvanov
- Kazan (Volga Region) Federal University, Kazan, Republic of Tatarstan, 420008, Russia.
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8
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ALKBH5 Inhibits Cancer Cell Proliferation in Prostate Cancer through KLF4/TERT Signaling. Andrologia 2023. [DOI: 10.1155/2023/8754940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023] Open
Abstract
N6-methyladenosine (m6A), as a reversible chemical modification of RNA, is a new type of posttranscriptional gene regulation, which plays an important role in cell differentiation and tumorigenesis, and is also a research hotspot in epigenetic transcriptomics in recent years. The purpose of this study was to discuss the action mechanism of m6A demethylase ALKBH5 in the occurrence of prostate cancer (PCa). We found that ALKBH5 was lowly expressed in PCa, and the decreased expression of ALKBH5 was responsible for the poor prognosis of prostate carcinomas. Moreover, ALKBH5 downregulated the expression of Krüppel-like factor 4 (KLF4) by reducing its mRNA stability, which reduced the transcriptional activity of KLF4 on the downstream target telomerase reverse transcriptase (TERT) and decreased TERT expression and telomerase activity, eventually inhibiting PCa cell growth. The findings of this study reveal the action mechanism of ALKBH5 in PCa from the perspective of epitranscriptomics, which would provide new ideas for the prevention of PCa.
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9
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Zhang Y, Yao C, Ju Z, Jiao D, Hu D, Qi L, Liu S, Wu X, Zhao C. Krüppel-like factors in tumors: Key regulators and therapeutic avenues. Front Oncol 2023; 13:1080720. [PMID: 36761967 PMCID: PMC9905823 DOI: 10.3389/fonc.2023.1080720] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 01/09/2023] [Indexed: 01/26/2023] Open
Abstract
Krüppel-like factors (KLFs) are a group of DNA-binding transcriptional regulators with multiple essential functions in various cellular processes, including proliferation, migration, inflammation, and angiogenesis. The aberrant expression of KLFs is often found in tumor tissues and is essential for tumor development. At the molecular level, KLFs regulate multiple signaling pathways and mediate crosstalk among them. Some KLFs may also be molecular switches for specific biological signals, driving their transition from tumor suppressors to promoters. At the histological level, the abnormal expression of KLFs is closely associated with tumor cell stemness, proliferation, apoptosis, and alterations in the tumor microenvironment. Notably, the role of each KLF in tumors varies according to tumor type and different stages of tumor development rather than being invariant. In this review, we focus on the advances in the molecular biology of KLFs, particularly the regulations of several classical signaling pathways by these factors, and the critical role of KLFs in tumor development. We also highlight their strong potential as molecular targets in tumor therapy and suggest potential directions for clinical translational research.
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Affiliation(s)
- Yuchen Zhang
- School of Acupuncture-moxibustion and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Chongjie Yao
- School of Acupuncture-moxibustion and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai, China,Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Ziyong Ju
- School of Acupuncture-moxibustion and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Danli Jiao
- School of Acupuncture-moxibustion and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Dan Hu
- School of Acupuncture-moxibustion and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Li Qi
- School of Acupuncture-moxibustion and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Shimin Liu
- School of Acupuncture-moxibustion and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai, China,Shanghai Research Institute of Acupuncture and Meridian, Shanghai, China
| | - Xueqing Wu
- Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China,*Correspondence: Chen Zhao, ; Xueqing Wu,
| | - Chen Zhao
- School of Acupuncture-moxibustion and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai, China,*Correspondence: Chen Zhao, ; Xueqing Wu,
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10
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Zhu T, Zheng JY, Huang LL, Wang YH, Yao DF, Dai HB. Human PARP1 substrates and regulators of its catalytic activity: An updated overview. Front Pharmacol 2023; 14:1137151. [PMID: 36909172 PMCID: PMC9995695 DOI: 10.3389/fphar.2023.1137151] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 02/09/2023] [Indexed: 02/25/2023] Open
Abstract
Poly (ADP-ribose) polymerase 1 (PARP1) is a key DNA damage sensor that is recruited to damaged sites after DNA strand breaks to initiate DNA repair. This is achieved by catalyzing attachment of ADP-ribose moieties, which are donated from NAD+, on the amino acid residues of itself or other acceptor proteins. PARP inhibitors (PARPi) that inhibit PARP catalytic activity and induce PARP trapping are commonly used for treating BRCA1/2-deficient breast and ovarian cancers through synergistic lethality. Unfortunately, resistance to PARPi frequently occurs. In this review, we present the novel substrates and regulators of the PARP1-catalyzed poly (ADP-ribosyl)ation (PARylatison) that have been identified in the last 3 years. The overall aim is the presentation of protein interactions of potential therapeutic intervention for overcoming the resistance to PARPi.
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Affiliation(s)
- Tao Zhu
- Department of Pharmacy, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Ju-Yan Zheng
- Institute of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, China
| | - Ling-Ling Huang
- Department of Pharmacy, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yan-Hong Wang
- Department of Pharmacy, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Di-Fei Yao
- Department of Pharmacy, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Hai-Bin Dai
- Department of Pharmacy, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
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11
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A Double-Edged Sword: The Two Faces of PARylation. Int J Mol Sci 2022; 23:ijms23179826. [PMID: 36077221 PMCID: PMC9456079 DOI: 10.3390/ijms23179826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/24/2022] [Accepted: 08/24/2022] [Indexed: 12/02/2022] Open
Abstract
Poly ADP-ribosylation (PARylation) is a post-translational modification process. Following the discovery of PARP-1, numerous studies have demonstrated the role of PARylation in the DNA damage and repair responses for cellular stress and DNA damage. Originally, studies on PARylation were confined to PARP-1 activation in the DNA repair pathway. However, the interplay between PARylation and DNA repair suggests that PARylation is important for the efficiency and accuracy of DNA repair. PARylation has contradicting roles; however, recent evidence implicates its importance in inflammation, metabolism, and cell death. These differences might be dependent on specific cellular conditions or experimental models used, and suggest that PARylation may play two opposing roles in cellular homeostasis. Understanding the role of PARylation in cellular function is not only important for identifying novel therapeutic approaches; it is also essential for gaining insight into the mechanisms of unexplored diseases. In this review, we discuss recent reports on the role of PARylation in mediating diverse cellular functions and homeostasis, such as DNA repair, inflammation, metabolism, and cell death.
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12
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Muoio D, Laspata N, Fouquerel E. Functions of ADP-ribose transferases in the maintenance of telomere integrity. Cell Mol Life Sci 2022; 79:215. [PMID: 35348914 PMCID: PMC8964661 DOI: 10.1007/s00018-022-04235-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 03/03/2022] [Accepted: 03/07/2022] [Indexed: 12/21/2022]
Abstract
The ADP-ribose transferase (ART) family comprises 17 enzymes that catalyze mono- or poly-ADP-ribosylation, a post-translational modification of proteins. Present in all subcellular compartments, ARTs are implicated in a growing number of biological processes including DNA repair, replication, transcription regulation, intra- and extra-cellular signaling, viral infection and cell death. Five members of the family, PARP1, PARP2, PARP3, tankyrase 1 and tankyrase 2 are mainly described for their crucial functions in the maintenance of genome stability. It is well established that the most describedrole of PARP1, 2 and 3 is the repair of DNA lesions while tankyrases 1 and 2 are crucial for maintaining the integrity of telomeres. Telomeres, nucleoprotein complexes located at the ends of eukaryotic chromosomes, utilize their unique structure and associated set of proteins to orchestrate the mechanisms necessary for their own protection and replication. While the functions of tankyrases 1 and 2 at telomeres are well known, several studies have also brought PARP1, 2 and 3 to the forefront of telomere protection. The singular quality of the telomeric environment has highlighted protein interactions and molecular pathways distinct from those described throughout the genome. The aim of this review is to provide an overview of the current knowledge on the multiple roles of PARP1, PARP2, PARP3, tankyrase 1 and tankyrase 2 in the maintenance and preservation of telomere integrity.
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Affiliation(s)
- Daniela Muoio
- UPMC Cancer Institute and Department of Pharmacology and Chemical Biology at the University of Pittsburgh, Hillman Cancer Center, 5115 Centre Avenue, Pittsburgh, PA, 15213, USA
| | - Natalie Laspata
- Department of Biochemistry and Molecular Biology, Thomas Jefferson University, 233 S. 10th street, Philadelphia, PA, 19107, USA
| | - Elise Fouquerel
- UPMC Cancer Institute and Department of Pharmacology and Chemical Biology at the University of Pittsburgh, Hillman Cancer Center, 5115 Centre Avenue, Pittsburgh, PA, 15213, USA.
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13
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Wang TH, Tseng WC, Leu YL, Chen CY, Lee WC, Chi YC, Cheng SF, Lai CY, Kuo CH, Yang SL, Yang SH, Shen JJ, Feng CH, Wu CC, Hwang TL, Wang CJ, Wang SH, Chen CC. The flavonoid corylin exhibits lifespan extension properties in mouse. Nat Commun 2022; 13:1238. [PMID: 35264584 PMCID: PMC8907184 DOI: 10.1038/s41467-022-28908-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 02/16/2022] [Indexed: 01/23/2023] Open
Abstract
In the long history of traditional Chinese medicine, single herbs and complex formulas have been suggested to increase lifespan. However, the identification of single molecules responsible for lifespan extension has been challenging. Here, we collected a list of traditional Chinese medicines with potential longevity properties from pharmacopeias. By utilizing the mother enrichment program, we systematically screened these traditional Chinese medicines and identified a single herb, Psoralea corylifolia, that increases lifespan in Saccharomyces cerevisiae. Next, twenty-two pure compounds were isolated from Psoralea corylifolia. One of the compounds, corylin, was found to extend the replicative lifespan in yeast by targeting the Gtr1 protein. In human umbilical vein endothelial cells, RNA sequencing data showed that corylin ameliorates cellular senescence. We also examined an in vivo mammalian model, and found that corylin extends lifespan in mice fed a high-fat diet. Taken together, these findings suggest that corylin may promote longevity.
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Affiliation(s)
- Tong-Hong Wang
- Tissue Bank, Chang Gung Memorial Hospital, Taoyuan, Taiwan.,Graduate Institute of Health Industry Technology, Research Center for Food and Cosmetic Safety, Research Center for Chinese Herbal Medicine, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan, Taiwan
| | - Wei-Che Tseng
- Graduate Institute of Natural Products, Chang Gung University, Taoyuan, Taiwan
| | - Yann-Lii Leu
- Tissue Bank, Chang Gung Memorial Hospital, Taoyuan, Taiwan.,Graduate Institute of Natural Products, Chang Gung University, Taoyuan, Taiwan
| | - Chi-Yuan Chen
- Tissue Bank, Chang Gung Memorial Hospital, Taoyuan, Taiwan.,Graduate Institute of Health Industry Technology, Research Center for Food and Cosmetic Safety, Research Center for Chinese Herbal Medicine, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan, Taiwan
| | - Wen-Chih Lee
- Office of Research and Development, Tzu Chi University, Hualien, Taiwan
| | - Ying-Chih Chi
- Cryo-EM Center, Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, USA
| | - Shu-Fang Cheng
- Graduate Institute of Natural Products, Chang Gung University, Taoyuan, Taiwan
| | - Chun-Yu Lai
- Graduate Institute of Natural Products, Chang Gung University, Taoyuan, Taiwan
| | - Chen-Hsin Kuo
- Graduate Institute of Natural Products, Chang Gung University, Taoyuan, Taiwan
| | - Shu-Ling Yang
- School of Traditional Chinese Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Sien-Hung Yang
- School of Traditional Chinese Medicine, Chang Gung University, Taoyuan, Taiwan.,Division of Chinese Internal Medicine, Center for Traditional Chinese Medicine, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Jiann-Jong Shen
- School of Traditional Chinese Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Chun-Hao Feng
- Graduate Institute of Natural Products, Chang Gung University, Taoyuan, Taiwan
| | - Chih-Ching Wu
- Department of Medical Biotechnology and Laboratory Science, Chang Gung University, Taoyuan, Taiwan.,Department of Otolaryngology-Head & Neck Surgery, Chang Gung Memorial Hospital, Taoyuan, Taiwan.,Molecular Medicine Research Center, Chang Gung University, Taoyuan, Taiwan.,Research Center for Emerging Viral Infections, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Tsong-Long Hwang
- Graduate Institute of Health Industry Technology, Research Center for Food and Cosmetic Safety, Research Center for Chinese Herbal Medicine, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan, Taiwan.,Graduate Institute of Natural Products, Chang Gung University, Taoyuan, Taiwan.,Department of Anesthesiology, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chia-Jen Wang
- Cell Therapy Core Laboratory, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Shu-Huei Wang
- Department of Anatomy and Cell Biology, College of Medicine, National Taiwan University, Taipei, Taiwan.
| | - Chin-Chuan Chen
- Tissue Bank, Chang Gung Memorial Hospital, Taoyuan, Taiwan. .,Graduate Institute of Natural Products, Chang Gung University, Taoyuan, Taiwan.
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14
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Ponomarev A, Gilazieva Z, Solovyeva V, Allegrucci C, Rizvanov A. Intrinsic and Extrinsic Factors Impacting Cancer Stemness and Tumor Progression. Cancers (Basel) 2022; 14:970. [PMID: 35205716 PMCID: PMC8869813 DOI: 10.3390/cancers14040970] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 02/03/2022] [Accepted: 02/08/2022] [Indexed: 02/06/2023] Open
Abstract
Tumor heterogeneity represents an important limitation to the development of effective cancer therapies. The presence of cancer stem cells (CSCs) and their differentiation hierarchies contribute to cancer complexity and confer tumors the ability to grow, resist treatment, survive unfavorable conditions, and invade neighboring and distant tissues. A large body of research is currently focusing on understanding the properties of CSCs, including their cellular and molecular origin, as well as their biological behavior in different tumor types. In turn, this knowledge informs strategies for targeting these tumor initiating cells and related cancer stemness. Cancer stemness is modulated by the tumor microenvironment, which influences CSC function and survival. Several advanced in vitro models are currently being developed to study cancer stemness in order to advance new knowledge of the key molecular pathways involved in CSC self-renewal and dormancy, as well as to mimic the complexity of patients' tumors in pre-clinical drug testing. In this review, we discuss CSCs and the modulation of cancer stemness by the tumor microenvironment, stemness factors and signaling pathways. In addition, we introduce current models that allow the study of CSCs for the development of new targeted therapies.
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Affiliation(s)
- Alexey Ponomarev
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia; (A.P.); (Z.G.); (V.S.)
| | - Zarema Gilazieva
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia; (A.P.); (Z.G.); (V.S.)
| | - Valeriya Solovyeva
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia; (A.P.); (Z.G.); (V.S.)
| | - Cinzia Allegrucci
- School of Veterinary Medicine and Science (SVMS) and Biodiscovery Institute, University of Nottingham, Nottingham NG7 2RD, UK;
| | - Albert Rizvanov
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia; (A.P.); (Z.G.); (V.S.)
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15
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Wang G, Han B, Zhang R, Liu Q, Wang X, Huang X, Liu D, Qiao W, Yang M, Luo X, Hou J, Yu B. C1q/TNF-Related Protein 9 Attenuates Atherosclerosis by Inhibiting Hyperglycemia-Induced Endothelial Cell Senescence Through the AMPKα/KLF4 Signaling Pathway. Front Pharmacol 2021; 12:758792. [PMID: 34744738 PMCID: PMC8569937 DOI: 10.3389/fphar.2021.758792] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Accepted: 10/07/2021] [Indexed: 12/18/2022] Open
Abstract
Hyperglycemia-induced endothelial cell senescence has been widely reported to be involved in the pathogenesis of type 2 diabetes mellitus‒accelerated atherosclerosis. Thus, understanding the underlying mechanisms and identifying potential therapeutic targets for endothelial cell senescence are valuable for attenuating atherosclerosis progression. C1q/tumor necrosis factor-related protein 9 (CTRP9), an emerging potential cardiokine, exerts a significant protective effect with respect to atherosclerosis, particularly in endothelial cells. However, the exact mechanism by which CTRP9 prevents endothelial cells from hyperglycemia-induced senescence remains unclear. This study aimed to investigate the effects of CTRP9 on hyperglycemia-induced endothelial cell senescence and atherosclerotic plaque formation in diabetic apolipoprotein E knockout (ApoE KO) mice. Human umbilical vein endothelial cells (HUVECs) were cultured in normal glucose (5.5 mM) and high glucose (40 mM) with or without recombinant human CTRP9 protein (3 μg/ml) for 48 h. Purified lentiviruses overexpressing CTRP9 (Lv-CTRP9) and control vectors containing green fluorescent protein (Lv-GFP) were injected via the tail vein into streptozotocin-induced diabetic ApoE KO mice. Results revealed that exposure of HUVECs to HG significantly increased the expression of Krüppel-like factor 4 (KLF4) and cyclin-dependent kinase inhibitor p21 (p21) and decreased that of telomerase reverse transcriptase (TERT). Treatment with recombinant human CTRP9 protein protected HUVECs from HG-induced premature senescence and dysfunction. CTRP9 promoted the phosphorylation of AMP-activated kinase (AMPK), attenuated the expression of KLF4 and p21 induced by HG, and increased the expression of TERT in HUVECs. Furthermore, in the background of AMPKα knockdown or KLF4 activation, the protective effects of CTRP9 were abolished. In-vivo experiments showed that the overexpression of CTRP9 inhibited vascular senescence and reduced atherosclerotic plaque formation in ApoE KO mice with diabetes. In conclusion, we demonstrate that KLF4 upregulation plays a crucial role in HG-induced endothelial senescence. This anti-atherosclerotic effect of CTRP9 may be partly attributed to the inhibition of HG-induced endothelial senescence through an AMPKα/KLF4-dependent mechanism, suggesting that CTRP9 could benefit further therapeutic approaches for type 2 diabetes mellitus‒accelerated atherosclerosis.
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Affiliation(s)
- Gang Wang
- The Key Laboratory of Myocardial Ischemia Organization, Chinese Ministry of Education, Harbin, China.,Department of Cardiology Organization, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Baihe Han
- The Key Laboratory of Myocardial Ischemia Organization, Chinese Ministry of Education, Harbin, China.,Department of Cardiology Organization, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Ruoxi Zhang
- Department of Cardiology, Harbin Yinghua Hospital, Harbin, China
| | - Qi Liu
- The Key Laboratory of Myocardial Ischemia Organization, Chinese Ministry of Education, Harbin, China.,Department of Cardiology Organization, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Xuedong Wang
- The Key Laboratory of Myocardial Ischemia Organization, Chinese Ministry of Education, Harbin, China.,Department of Cardiology Organization, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Xingtao Huang
- The Key Laboratory of Myocardial Ischemia Organization, Chinese Ministry of Education, Harbin, China.,Department of Cardiology Organization, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Dandan Liu
- The Key Laboratory of Myocardial Ischemia Organization, Chinese Ministry of Education, Harbin, China.,Department of Cardiology Organization, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Weishen Qiao
- The Key Laboratory of Myocardial Ischemia Organization, Chinese Ministry of Education, Harbin, China.,Department of Cardiology Organization, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Mengyue Yang
- The Key Laboratory of Myocardial Ischemia Organization, Chinese Ministry of Education, Harbin, China.,Department of Cardiology Organization, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Xing Luo
- The Key Laboratory of Myocardial Ischemia Organization, Chinese Ministry of Education, Harbin, China.,Department of Cardiology Organization, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Jingbo Hou
- The Key Laboratory of Myocardial Ischemia Organization, Chinese Ministry of Education, Harbin, China.,Department of Cardiology Organization, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Bo Yu
- The Key Laboratory of Myocardial Ischemia Organization, Chinese Ministry of Education, Harbin, China.,Department of Cardiology Organization, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
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16
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Feng L, Wang J, Zhang J, Diao J, He L, Fu C, Liao H, Xu X, Gao Y, Zhou C. Comprehensive Analysis of E3 Ubiquitin Ligases Reveals Ring Finger Protein 223 as a Novel Oncogene Activated by KLF4 in Pancreatic Cancer. Front Cell Dev Biol 2021; 9:738709. [PMID: 34722520 PMCID: PMC8551701 DOI: 10.3389/fcell.2021.738709] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Accepted: 09/15/2021] [Indexed: 12/22/2022] Open
Abstract
Pancreatic cancer is one of the major malignancies and causes of mortality worldwide. E3 ubiquitin-protein ligases transfer activated ubiquitin from ubiquitin-conjugating enzymes to protein substrates and confer substrate specificity in cancer. In this study, we first downloaded data from The Cancer Genome Atlas pancreatic adenocarcinoma dataset, acquired all 27 differentially expressed genes (DEGs), and identified genomic alterations. Then, the prognostic significance of DEGs was analyzed, and eight DEGs (MECOM, CBLC, MARCHF4, RNF166, TRIM46, LONRF3, RNF39, and RNF223) and two clinical parameters (pathological N stage and T stage) exhibited prognostic significance. RNF223 showed independent significance as an unfavorable prognostic marker and was chosen for subsequent analysis. Next, the function of RNF223 in the pancreatic cancer cell lines ASPC-1 and PANC-1 was investigated, and RNF223 silencing promoted pancreatic cancer growth and migration. To explore the potential targets and pathways of RNF223 in pancreatic cancer, quantitative proteomics was applied to analyze differentially expressed proteins, and metabolism-related pathways were primarily enriched. Finally, the reason for the elevated expression of RNF223 was analyzed, and KLF4 was shown to contribute to the increased expression of RNF233. In conclusion, this study comprehensively analyzed the clinical significance of E3 ligases. Functional assays revealed that RNF223 promotes cancer by regulating cell metabolism. Finally, the elevated expression of RNF223 was attributed to KLF4-mediated transcriptional activation. This study broadens our knowledge regarding E3 ubiquitin ligases and signal transduction and provides novel markers and therapeutic targets in pancreatic cancer.
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Affiliation(s)
- Lei Feng
- Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Jieqing Wang
- The First Affiliated Hospital, Sun Yat-sen university, Guangzhou, China
| | - Jianmin Zhang
- Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Jingfang Diao
- Guangdong Provincial Hospital of Traditional Chinese Medicine, Guangzhou, China
| | | | - Chaoyi Fu
- Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Hui Liao
- Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Xiaoping Xu
- Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Yi Gao
- Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, China.,State Key Laboratory of Organ Failure Research, Southern Medical University, Guangzhou, China
| | - Chenjie Zhou
- Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, China
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17
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Natural Bioactive Compounds Targeting Epigenetic Pathways in Cancer: A Review on Alkaloids, Terpenoids, Quinones, and Isothiocyanates. Nutrients 2021; 13:nu13113714. [PMID: 34835969 PMCID: PMC8621755 DOI: 10.3390/nu13113714] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 10/18/2021] [Accepted: 10/19/2021] [Indexed: 12/11/2022] Open
Abstract
Cancer is one of the most complex and systemic diseases affecting the health of mankind, causing major deaths with a significant increase. This pathology is caused by several risk factors, of which genetic disturbances constitute the major elements, which not only initiate tumor transformation but also epigenetic disturbances which are linked to it and which can induce transcriptional instability. Indeed, the involvement of epigenetic disturbances in cancer has been the subject of correlations today, in addition to the use of drugs that operate specifically on different epigenetic pathways. Natural molecules, especially those isolated from medicinal plants, have shown anticancer effects linked to mechanisms of action. The objective of this review is to explore the anticancer effects of alkaloids, terpenoids, quinones, and isothiocyanates.
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18
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Walter K, Rodriguez-Aznar E, Ferreira MSV, Frappart PO, Dittrich T, Tiwary K, Meessen S, Lerma L, Daiss N, Schulte LA, Najafova Z, Arnold F, Usachov V, Azoitei N, Erkan M, Lechel A, Brümmendorf TH, Seufferlein T, Kleger A, Tabarés E, Günes C, Johnsen SA, Beier F, Sainz B, Hermann PC. Telomerase and Pluripotency Factors Jointly Regulate Stemness in Pancreatic Cancer Stem Cells. Cancers (Basel) 2021; 13:cancers13133145. [PMID: 34201898 PMCID: PMC8268125 DOI: 10.3390/cancers13133145] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 06/14/2021] [Accepted: 06/18/2021] [Indexed: 12/12/2022] Open
Abstract
To assess the role of telomerase activity and telomere length in pancreatic CSCs we used different CSC enrichment methods (CD133, ALDH, sphere formation) in primary patient-derived pancreatic cancer cells. We show that CSCs have higher telomerase activity and longer telomeres than bulk tumor cells. Inhibition of telomerase activity, using genetic knockdown or pharmacological inhibitor (BIBR1532), resulted in CSC marker depletion, abrogation of sphere formation in vitro and reduced tumorigenicity in vivo. Furthermore, we identify a positive feedback loop between stemness factors (NANOG, OCT3/4, SOX2, KLF4) and telomerase, which is essential for the self-renewal of CSCs. Disruption of the balance between telomerase activity and stemness factors eliminates CSCs via induction of DNA damage and apoptosis in primary patient-derived pancreatic cancer samples, opening future perspectives to avoid CSC-driven tumor relapse. In the present study, we demonstrate that telomerase regulation is critical for the "stemness" maintenance in pancreatic CSCs and examine the effects of telomerase inhibition as a potential treatment option of pancreatic cancer. This may significantly promote our understanding of PDAC tumor biology and may result in improved treatment for pancreatic cancer patients.
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Affiliation(s)
- Karolin Walter
- Department of Internal Medicine I, University Medical Centre Ulm, 89081 Ulm, Germany; (K.W.); (E.R.-A.); (P.-O.F.); (T.D.); (K.T.); (N.D.); (L.-A.S.); (F.A.); (V.U.); (N.A.); (A.L.); (T.S.); (A.K.)
| | - Eva Rodriguez-Aznar
- Department of Internal Medicine I, University Medical Centre Ulm, 89081 Ulm, Germany; (K.W.); (E.R.-A.); (P.-O.F.); (T.D.); (K.T.); (N.D.); (L.-A.S.); (F.A.); (V.U.); (N.A.); (A.L.); (T.S.); (A.K.)
| | - Monica S. Ventura Ferreira
- Department of Hematology, Oncology, Hemostaseology and Stem Cell Transplantation, University Hospital of the RWTH Aachen, 52062 Aachen, Germany; (M.S.V.F.); (T.H.B.); (F.B.)
| | - Pierre-Olivier Frappart
- Department of Internal Medicine I, University Medical Centre Ulm, 89081 Ulm, Germany; (K.W.); (E.R.-A.); (P.-O.F.); (T.D.); (K.T.); (N.D.); (L.-A.S.); (F.A.); (V.U.); (N.A.); (A.L.); (T.S.); (A.K.)
- Institute of Toxicology, University Medical Centre of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany
| | - Tabea Dittrich
- Department of Internal Medicine I, University Medical Centre Ulm, 89081 Ulm, Germany; (K.W.); (E.R.-A.); (P.-O.F.); (T.D.); (K.T.); (N.D.); (L.-A.S.); (F.A.); (V.U.); (N.A.); (A.L.); (T.S.); (A.K.)
| | - Kanishka Tiwary
- Department of Internal Medicine I, University Medical Centre Ulm, 89081 Ulm, Germany; (K.W.); (E.R.-A.); (P.-O.F.); (T.D.); (K.T.); (N.D.); (L.-A.S.); (F.A.); (V.U.); (N.A.); (A.L.); (T.S.); (A.K.)
| | - Sabine Meessen
- Department of Urology, Ulm University, 89081 Ulm, Germany; (S.M.); (C.G.)
| | - Laura Lerma
- Department of Preventive Medicine, Public Health and Microbiology, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain; (L.L.); (E.T.)
| | - Nora Daiss
- Department of Internal Medicine I, University Medical Centre Ulm, 89081 Ulm, Germany; (K.W.); (E.R.-A.); (P.-O.F.); (T.D.); (K.T.); (N.D.); (L.-A.S.); (F.A.); (V.U.); (N.A.); (A.L.); (T.S.); (A.K.)
| | - Lucas-Alexander Schulte
- Department of Internal Medicine I, University Medical Centre Ulm, 89081 Ulm, Germany; (K.W.); (E.R.-A.); (P.-O.F.); (T.D.); (K.T.); (N.D.); (L.-A.S.); (F.A.); (V.U.); (N.A.); (A.L.); (T.S.); (A.K.)
| | - Zeynab Najafova
- Department of Surgery, University Medical Center Göttingen, 37075 Göttingen, Germany;
| | - Frank Arnold
- Department of Internal Medicine I, University Medical Centre Ulm, 89081 Ulm, Germany; (K.W.); (E.R.-A.); (P.-O.F.); (T.D.); (K.T.); (N.D.); (L.-A.S.); (F.A.); (V.U.); (N.A.); (A.L.); (T.S.); (A.K.)
| | - Valentyn Usachov
- Department of Internal Medicine I, University Medical Centre Ulm, 89081 Ulm, Germany; (K.W.); (E.R.-A.); (P.-O.F.); (T.D.); (K.T.); (N.D.); (L.-A.S.); (F.A.); (V.U.); (N.A.); (A.L.); (T.S.); (A.K.)
| | - Ninel Azoitei
- Department of Internal Medicine I, University Medical Centre Ulm, 89081 Ulm, Germany; (K.W.); (E.R.-A.); (P.-O.F.); (T.D.); (K.T.); (N.D.); (L.-A.S.); (F.A.); (V.U.); (N.A.); (A.L.); (T.S.); (A.K.)
| | - Mert Erkan
- Department of Surgery, Koç University School of Medicine, Istanbul 34450, Turkey;
- Research Center for Translational Medicine, Koç University, Istanbul 34450, Turkey
| | - Andre Lechel
- Department of Internal Medicine I, University Medical Centre Ulm, 89081 Ulm, Germany; (K.W.); (E.R.-A.); (P.-O.F.); (T.D.); (K.T.); (N.D.); (L.-A.S.); (F.A.); (V.U.); (N.A.); (A.L.); (T.S.); (A.K.)
| | - Tim H. Brümmendorf
- Department of Hematology, Oncology, Hemostaseology and Stem Cell Transplantation, University Hospital of the RWTH Aachen, 52062 Aachen, Germany; (M.S.V.F.); (T.H.B.); (F.B.)
| | - Thomas Seufferlein
- Department of Internal Medicine I, University Medical Centre Ulm, 89081 Ulm, Germany; (K.W.); (E.R.-A.); (P.-O.F.); (T.D.); (K.T.); (N.D.); (L.-A.S.); (F.A.); (V.U.); (N.A.); (A.L.); (T.S.); (A.K.)
| | - Alexander Kleger
- Department of Internal Medicine I, University Medical Centre Ulm, 89081 Ulm, Germany; (K.W.); (E.R.-A.); (P.-O.F.); (T.D.); (K.T.); (N.D.); (L.-A.S.); (F.A.); (V.U.); (N.A.); (A.L.); (T.S.); (A.K.)
| | - Enrique Tabarés
- Department of Preventive Medicine, Public Health and Microbiology, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain; (L.L.); (E.T.)
| | - Cagatay Günes
- Department of Urology, Ulm University, 89081 Ulm, Germany; (S.M.); (C.G.)
| | - Steven A. Johnsen
- Gene Regulatory Mechanisms and Molecular Epigenetics Lab, Gastroenterology Research, Mayo Clinic, Rochester, MN 55905, USA;
| | - Fabian Beier
- Department of Hematology, Oncology, Hemostaseology and Stem Cell Transplantation, University Hospital of the RWTH Aachen, 52062 Aachen, Germany; (M.S.V.F.); (T.H.B.); (F.B.)
| | - Bruno Sainz
- Department of Biochemistry, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain;
- Department of Cancer Biology, Instituto de Investigaciones Biomédicas “Alberto Sols” (IIBM), CSIC-UAM, 28049 Madrid, Spain
- Chronic Diseases and Cancer, Area 3—Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), 28049 Madrid, Spain
| | - Patrick C. Hermann
- Department of Internal Medicine I, University Medical Centre Ulm, 89081 Ulm, Germany; (K.W.); (E.R.-A.); (P.-O.F.); (T.D.); (K.T.); (N.D.); (L.-A.S.); (F.A.); (V.U.); (N.A.); (A.L.); (T.S.); (A.K.)
- Correspondence: ; Tel.: +49-731-500-44736
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Savelyev NV, Shepelev NM, Lavrik OI, Rubtsova MP, Dontsova OA. PARP1 Regulates the Biogenesis and Activity of Telomerase Complex Through Modification of H/ACA-Proteins. Front Cell Dev Biol 2021; 9:621134. [PMID: 34095104 PMCID: PMC8170401 DOI: 10.3389/fcell.2021.621134] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Accepted: 04/26/2021] [Indexed: 11/23/2022] Open
Abstract
Poly(ADP-ribose) polymerase 1 (PARP1) is established as a key regulator of the cellular DNA damage response and apoptosis. In addition, PARP1 participates in the global regulation of DNA repair, transcription, telomere maintenance, and inflammation response by modulating various DNA-protein and protein-protein interactions. Recently, it was reported that PARP1 also influences splicing and ribosomal RNA biogenesis. The H/ACA ribonucleoprotein complex is involved in a variety of cellular processes such as RNA maturation. It contains non-coding RNAs with specific H/ACA domains and four proteins: dyskerin (DKC1), GAR1, NHP2, and NOP10. Two of these proteins, DKC1 and GAR1, are targets of poly(ADP-ribosyl)ation catalyzed by PARP1. The H/ACA RNA-binding proteins are involved in the regulation of maturation and activity of the telomerase complex, which maintains telomere length. In this study, we demonstrated that of poly(ADP-ribosyl)ation influences on RNA-binding properties of DKC1 and GAR1 and telomerase assembly and activity. Our data provide the evidence that poly(ADP-ribosyl)ation regulates telomerase complex assembly and activity, in turn regulating telomere length that may be useful for design and development of anticancer therapeutic approaches that are based on the inhibition of PARP1 and telomerase activities.
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Affiliation(s)
- Nikita V Savelyev
- Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia.,A.N. Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Nikita M Shepelev
- Center of Life Sciences, Skolkovo Institute of Science and Technology, Skolkovo, Russia
| | - Olga I Lavrik
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia.,Department of Natural Sciences, Novosibirsk State University, Novosibirsk, Russia
| | - Maria P Rubtsova
- Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia.,A.N. Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Olga A Dontsova
- Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia.,A.N. Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia.,Center of Life Sciences, Skolkovo Institute of Science and Technology, Skolkovo, Russia.,Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
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20
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Dai Z, Liu P. High copy number variations, particular transcription factors, and low immunity contribute to the stemness of prostate cancer cells. J Transl Med 2021; 19:206. [PMID: 33985534 PMCID: PMC8117623 DOI: 10.1186/s12967-021-02870-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 05/03/2021] [Indexed: 12/30/2022] Open
Abstract
Background Tumor metastasis is the main cause of death of cancer patients, and cancer stem cells (CSCs) is the basis of tumor metastasis. However, systematic analysis of the stemness of prostate cancer cells is still not abundant. In this study, we explore the effective factors related to the stemness of prostate cancer cells by comprehensively mining the multi-omics data from TCGA database. Methods Based on the prostate cancer transcriptome data in TCGA, gene expression modules that strongly relate to the stemness of prostate cancer cells are obtained with WGCNA and stemness scores. Copy number variation of stemness genes of prostate cancer is calculated and the difference of transcription factors between prostate cancer and normal tissues is evaluated by using CNV (copy number variation) data and ATAC-seq data. The protein interaction network of stemness genes in prostate cancer is constructed using the STRING database. Meanwhile, the correlation between stemness genes of prostate cancer and immune cells is analyzed. Results Prostate cancer with higher Gleason grade possesses higher cell stemness. The gene set highly related to prostate cancer stemness has higher CNV in prostate cancer samples than that in normal samples. Although the transcription factors of stemness genes have similar expressions, they have different contributions between normal and prostate cancer tissues; and particular transcription factors enhance the stemness of prostate cancer, such as PUM1, CLOCK, SP1, TCF12, and so on. In addition, the lower tumor immune microenvironment is conducive to the stemness of prostate cancer. CD8 + T cells and M1 macrophages may play more important role in the stemness of prostate cancer than other immune cells in the tumor microenvironment. Finally, EZH2 is found to play a central role in stemness genes and is negatively correlated with resting mast cells and positively correlated with activated memory CD4 + T cells. Conclusions Based on the systematic and combined analysis of multi-omics data, we find that high copy number variation, specific transcription factors, and low immune microenvironment jointly contribute to the stemness of prostate cancer cells. These findings may provide us new clues and directions for the future research on stemness of prostate cancer. Supplementary Information The online version contains supplementary material available at 10.1186/s12967-021-02870-x.
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Affiliation(s)
- Zao Dai
- College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu, China
| | - Ping Liu
- College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu, China.
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21
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Dou S, Wang Q, Qi X, Zhang B, Jiang H, Chen S, Duan H, Lu Y, Dong J, Cao Y, Xie L, Zhou Q, Shi W. Molecular identity of human limbal heterogeneity involved in corneal homeostasis and privilege. Ocul Surf 2021; 21:206-220. [PMID: 33964410 DOI: 10.1016/j.jtos.2021.04.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 04/10/2021] [Accepted: 04/24/2021] [Indexed: 12/20/2022]
Abstract
PURPOSE The corneal limbus maintains the homeostasis, immune and angiogenic privilege of cornea. This study aimed to depict the landscape of human limbal tissues by single-cell RNA sequencing (scRNA-seq). METHODS Single cells of human limbus collected from donor corneas were subjected to 10x scRNA-seq, followed by clustering cell types through the t-distributed stochastic neighbor embedding (t-SNE) and unbiased computational informatic analysis. Immunofluorescent staining was performed using human corneas to validate the analysis results. RESULTS 47,627 cells acquired from six human limbal tissues were collected and subjected to scRNA-seq. 14 distinct clusters were identified and 8 cell types were annotated with representative markers. In-depth dissection revealed three limbal epithelial cell subtypes and refined the X-Y-Z hypothesis of corneal epithelial maintenance. We further unveiled two cell states with higher stemness (TP63+ and CCL20+ cells), and two other differentiated cell states (GPHA2+ and KRT6B + cells) in homeostatic limbal stem/progenitor cells (LSPCs) that differ in transcriptional profiles. Cell-cell communication analysis revealed the central role of LSPCs and their bidirectional regulation with various niche cells. Moreover, comparative analysis between limbus and skin deciphered the pivotal contribution of limbal immune cells, vascular and lymphatic endothelial cells to corneal immune and angiogenic privilege. CONCLUSIONS The human limbus atlas provided valuable resources and foundations for understanding corneal biology, disease and potential interventions.
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Affiliation(s)
- Shengqian Dou
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, China; Qingdao Eye Hospital of Shandong First Medical University, Qingdao, China
| | - Qun Wang
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, China; Qingdao Eye Hospital of Shandong First Medical University, Qingdao, China
| | - Xia Qi
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, China; Qingdao Eye Hospital of Shandong First Medical University, Qingdao, China
| | - Bin Zhang
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, China; Qingdao Eye Hospital of Shandong First Medical University, Qingdao, China
| | - Hui Jiang
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, China; Qingdao Eye Hospital of Shandong First Medical University, Qingdao, China
| | - Shengwen Chen
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, China; Qingdao Eye Hospital of Shandong First Medical University, Qingdao, China
| | - Haoyun Duan
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, China; Qingdao Eye Hospital of Shandong First Medical University, Qingdao, China
| | - Yao Lu
- OE Biotech Co., Ltd, Shanghai, Shanghai, China
| | | | - Yihai Cao
- Department of Microbiology, Tumor, and Cell Biology, Karolinska Institute, Stockholm, Sweden
| | - Lixin Xie
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, China; Qingdao Eye Hospital of Shandong First Medical University, Qingdao, China
| | - Qingjun Zhou
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, China; Qingdao Eye Hospital of Shandong First Medical University, Qingdao, China.
| | - Weiyun Shi
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, China; Qingdao Eye Hospital of Shandong First Medical University, Qingdao, China; Eye Hospital of Shandong First Medical University, Jinan, China.
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22
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Sadhukhan R, Ghosh U. PARP1 modulates telomere sister chromatid exchange and telomere length homeostasis by regulating telomere localization of SLX4 in U2OS cells. Life Sci 2021; 277:119556. [PMID: 33945829 DOI: 10.1016/j.lfs.2021.119556] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Revised: 04/12/2021] [Accepted: 04/20/2021] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Poly(ADP-ribose) polymerase1 (PARP1) interacts and poly(ADP-ribosyl)ates telomere repeat binding factor 2 (TRF2), which acts as a platform to recruit a large number of proteins at the telomere. Since the discovery of TRF2-SLX4 interaction, SLX4 is becoming the key player in telomere length (TL) maintenance and repair by telomere sister chromatid exchange (T-SCE). Defective TL maintenance pathway results in a spectrum of diseases called telomeropathies like dyskeratosis congenita, aplastic anemia, fanconi anemia, cancer. We aimed to study the role of SLX4 and PARP1 on each other's telomere localization, T-SCE, and TL maintenance in human telomerase-negative osteosarcoma U2OS cells to understand some of the molecular mechanisms of telomere homeostasis. MATERIALS AND METHODS We checked the role of SLX4 and PARP1 on each other's telomere localization by telomere immunofluorescence. We have cloned full-length wild-type and catalytically inactive mutant PARP1 to understand the role of poly(ADP-ribosyl)ation reaction by PARP1 in telomere length homeostasis. TL of U2OS cells was measured by Q-FISH. T-SCE was measured by Telomere-FISH. KEY FINDINGS We observed that SLX4 has no role in the telomere localization of PARP1. However, reduced localization of SLX4 at undamaged and damaged telomere upon PARP1 depletion was reversed by overexpression of exogenous wild-type PARP1 but not by overexpression of catalytically inactive mutant PARP1. PARP1 depletion synergized SLX4 depletion-mediated reduction of T-SCE. Furthermore, SLX4 depletion elongated TL, and combined insufficiency of SLX4 with PARP1 further elongated TL. CONCLUSION So, PARP1 controls SLX4 recruitment at telomere by poly(ADP-ribosyl)ation reaction, thereby regulating SLX4-mediated T-SCE and TL homeostasis.
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Affiliation(s)
- Ratan Sadhukhan
- Department of Biochemistry & Biophysics, University of Kalyani, Kalyani 741235, India
| | - Utpal Ghosh
- Department of Biochemistry & Biophysics, University of Kalyani, Kalyani 741235, India.
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23
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Demény MA, Virág L. The PARP Enzyme Family and the Hallmarks of Cancer Part 1. Cell Intrinsic Hallmarks. Cancers (Basel) 2021; 13:cancers13092042. [PMID: 33922595 PMCID: PMC8122967 DOI: 10.3390/cancers13092042] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 04/02/2021] [Accepted: 04/20/2021] [Indexed: 12/21/2022] Open
Abstract
The 17-member poly (ADP-ribose) polymerase enzyme family, also known as the ADP-ribosyl transferase diphtheria toxin-like (ARTD) enzyme family, contains DNA damage-responsive and nonresponsive members. Only PARP1, 2, 5a, and 5b are capable of modifying their targets with poly ADP-ribose (PAR) polymers; the other PARP family members function as mono-ADP-ribosyl transferases. In the last decade, PARP1 has taken center stage in oncology treatments. New PARP inhibitors (PARPi) have been introduced for the targeted treatment of breast cancer 1 or 2 (BRCA1/2)-deficient ovarian and breast cancers, and this novel therapy represents the prototype of the synthetic lethality paradigm. Much less attention has been paid to other PARPs and their potential roles in cancer biology. In this review, we summarize the roles played by all PARP enzyme family members in six intrinsic hallmarks of cancer: uncontrolled proliferation, evasion of growth suppressors, cell death resistance, genome instability, reprogrammed energy metabolism, and escape from replicative senescence. In a companion paper, we will discuss the roles of PARP enzymes in cancer hallmarks related to cancer-host interactions, including angiogenesis, invasion and metastasis, evasion of the anticancer immune response, and tumor-promoting inflammation. While PARP1 is clearly involved in all ten cancer hallmarks, an increasing body of evidence supports the role of other PARPs in modifying these cancer hallmarks (e.g., PARP5a and 5b in replicative immortality and PARP2 in cancer metabolism). We also highlight controversies, open questions, and discuss prospects of recent developments related to the wide range of roles played by PARPs in cancer biology. Some of the summarized findings may explain resistance to PARPi therapy or highlight novel biological roles of PARPs that can be therapeutically exploited in novel anticancer treatment paradigms.
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Affiliation(s)
- Máté A. Demény
- Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary
- MTA-DE Cell Biology and Signaling Research Group, University of Debrecen, 4032 Debrecen, Hungary
- Correspondence: (M.A.D.); (L.V.)
| | - László Virág
- Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary
- MTA-DE Cell Biology and Signaling Research Group, University of Debrecen, 4032 Debrecen, Hungary
- Correspondence: (M.A.D.); (L.V.)
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24
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Yang L, Chen Y, Liu N, Shi Q, Han X, Gan W, Li D. Low expression of TRAF3IP2-AS1 promotes progression of NONO-TFE3 translocation renal cell carcinoma by stimulating N 6-methyladenosine of PARP1 mRNA and downregulating PTEN. J Hematol Oncol 2021; 14:46. [PMID: 33741027 PMCID: PMC7980631 DOI: 10.1186/s13045-021-01059-5] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 03/08/2021] [Indexed: 11/30/2022] Open
Abstract
Background NONO-TFE3 translocation renal cell carcinoma (NONO-TFE3 tRCC) is one subtype of RCCs associated with Xp11.2 translocation/TFE3 gene fusions RCC (Xp11.2 tRCCs). Long non-coding RNA (lncRNA) has attracted great attention in cancer research. The function and mechanisms of TRAF3IP2 antisense RNA 1 (TRAF3IP2-AS1), a natural antisense lncRNA, in NONO-TFE3 tRCC remain poorly understood. Methods FISH and qRT-PCR were undertaken to study the expression, localization and clinical significance of TRAF3IP2-AS1 in Xp11.2 tRCC tissues and cells. The functions of TRAF3IP2-AS1 in tRCC were investigated by proliferation analysis, EdU staining, colony and sphere formation assay, Transwell assay and apoptosis analysis. The regulatory mechanisms among TRAF3IP2-AS1, PARP1, PTEN and miR-200a-3p/153-3p/141-3p were investigated by luciferase assay, RNA immunoprecipitation, Western blot and immunohistochemistry. Results The expression of TRAF3IP2-AS1 was suppressed by NONO-TFE3 fusion in NONO-TFE3 tRCC tissues and cells. Overexpression of TRAF3IP2-AS1 inhibited the proliferation, migration and invasion of UOK109 cells which were derived from cancer tissue of patient with NONO-TFE3 tRCC. Mechanistic studies revealed that TRAF3IP2-AS1 accelerated the decay of PARP1 mRNA by direct binding and recruitment of N6-methyladenosie methyltransferase complex. Meanwhile, TRAF3IP2-AS1 competitively bound to miR-200a-3p/153-3p/141-3p and prevented those from decreasing the level of PTEN. Conclusions TRAF3IP2-AS1 functions as a tumor suppressor in NONO-TFE3 tRCC progression and may serve as a novel target for NONO-TFE3 tRCC therapy. TRAF3IP2-AS1 expression has the potential to serve as a novel diagnostic and prognostic biomarker for NONO-TFE3 tRCC detection. Supplementary Information The online version contains supplementary material available at 10.1186/s13045-021-01059-5.
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Affiliation(s)
- Lei Yang
- Immunology and Reproduction Biology Laboratory & State Key Laboratory of Analytical Chemistry for Life Science, Medical School, Nanjing University, Nanjing, 210093, Jiangsu, China.,Jiangsu Key Laboratory of Molecular Medicine, Nanjing University, Nanjing, 210093, Jiangsu, China
| | - Yi Chen
- Immunology and Reproduction Biology Laboratory & State Key Laboratory of Analytical Chemistry for Life Science, Medical School, Nanjing University, Nanjing, 210093, Jiangsu, China.,Jiangsu Key Laboratory of Molecular Medicine, Nanjing University, Nanjing, 210093, Jiangsu, China
| | - Ning Liu
- Immunology and Reproduction Biology Laboratory & State Key Laboratory of Analytical Chemistry for Life Science, Medical School, Nanjing University, Nanjing, 210093, Jiangsu, China.,Jiangsu Key Laboratory of Molecular Medicine, Nanjing University, Nanjing, 210093, Jiangsu, China
| | - QianCheng Shi
- Immunology and Reproduction Biology Laboratory & State Key Laboratory of Analytical Chemistry for Life Science, Medical School, Nanjing University, Nanjing, 210093, Jiangsu, China.,Jiangsu Key Laboratory of Molecular Medicine, Nanjing University, Nanjing, 210093, Jiangsu, China
| | - Xiaodong Han
- Immunology and Reproduction Biology Laboratory & State Key Laboratory of Analytical Chemistry for Life Science, Medical School, Nanjing University, Nanjing, 210093, Jiangsu, China.,Jiangsu Key Laboratory of Molecular Medicine, Nanjing University, Nanjing, 210093, Jiangsu, China
| | - Weidong Gan
- Department of Urology, Affiliated Drum Tower Hospital of Medical School of Nanjing University, Nanjing, 210008, Jiangsu, China.
| | - Dongmei Li
- Immunology and Reproduction Biology Laboratory & State Key Laboratory of Analytical Chemistry for Life Science, Medical School, Nanjing University, Nanjing, 210093, Jiangsu, China. .,Jiangsu Key Laboratory of Molecular Medicine, Nanjing University, Nanjing, 210093, Jiangsu, China.
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25
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Li Y, Li J, Zhou T, Pan G, Huang K. Generation of PARP1 gene knockout human embryonic stem cell line using CRISPR/Cas9. Stem Cell Res 2021; 53:102288. [PMID: 33740642 DOI: 10.1016/j.scr.2021.102288] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 02/22/2021] [Accepted: 03/10/2021] [Indexed: 12/26/2022] Open
Abstract
PARP1 encodes a chromatin-associated enzyme which responsible for post-translational poly(ADP-ribosyl)ation modification (Hsieh et al., 2017). It plays an important role in nucleotide excision repair, non-homologous end joining, DNA mismatch repair and many other DNA repair process. Also, PARP1 participates in inflammation and aging. However, its role in human embryonic stem cell biology has not been fully resolved. To clarify the function of PARP1 in human embryonic stem cells, we reported a PARP1 knockout human embryonic stem cell line, generated by CRISPR/Cas9 mediated gene targeting. This cell line shows normal karyotype, pluripotent stem cell marker expression and differentiation potential in vitro.
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Affiliation(s)
- Yuhang Li
- CAS Key Laboratory of Regenerative Biology, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jinbing Li
- CAS Key Laboratory of Regenerative Biology, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Tiancheng Zhou
- CAS Key Laboratory of Regenerative Biology, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China
| | - Guangjin Pan
- CAS Key Laboratory of Regenerative Biology, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China
| | - Ke Huang
- CAS Key Laboratory of Regenerative Biology, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China; The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen 518107, China.
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Zhang Y, Huang J, Huang Y, Zhang S, Wu W, Long H, Duan X, Lai Y, Wu W. Tanshinone I and simvastatin inhibit melanoma tumour cell growth by regulating poly (ADP ribose) polymerase 1 expression. Mol Med Rep 2020; 23:40. [PMID: 33179075 PMCID: PMC7684874 DOI: 10.3892/mmr.2020.11678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 08/03/2020] [Indexed: 11/18/2022] Open
Abstract
Melanoma is one of the most aggressive forms of skin tumour with poor prognosis; no effective therapy has been established for melanoma at the metastatic stage. The present study aimed to investigate the role of poly (ADP ribose) polymerase (PARP) inhibitors (PARPis) and PARP1 expression in melanoma progression. In addition, whether high PARP1 expression was associated with poor overall survival in melanoma, and whether a combination effect existed between PARPis and other anti-tumour compounds (e.g., sunitinib) was analysed. The PARP1 expression was detected using western blot analysis and the proliferation of cells was detected with a colony formation assay. In addition, cell viability assays and xenograft tumor experiments were conducted. The results of the present study demonstrated that sunitinib reduced PARP1 expression and proliferation of melanoma cells. Notably, one of the PARPis, veliparib, reversed the inhibitory effect of sunitinib on PARP1 expression and proliferation, indicating that inhibition of PARP1 enzyme activity by PARPi may be different from the inhibition of PARP1 expression in melanoma cell biological function. To further confirm the relationship between PARP1 expression and tumour cell proliferation, seven compounds, including common approved drugs and natural Chinese medicine monomers, were screened, and the results demonstrated that simvastatin and tanshinone I exerted an inhibitory effect on PARP1 expression and melanoma cell proliferation, and their combination was more effective than simvastatin alone in vivo. The results indicated that simvastatin and tanshinone I inhibited melanoma and renal tumour cells by regulating PARP1 expression, and in addition to the enzyme activity of PARP1, the expression of PARP1 protein may serve a role in tumour progression.
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Affiliation(s)
- Yuyan Zhang
- Department of Pharmacy, Guangzhou Institute of Dermatology, Guangzhou, Guangdong 510095, P.R. China
| | - Jiusui Huang
- Department of Pharmacy, Guangzhou Institute of Dermatology, Guangzhou, Guangdong 510095, P.R. China
| | - Yapeng Huang
- Department of Urology, Minimally Invasive Surgery Centre, Guangzhou Urology Research Institute, Guangdong Key Laboratory of Urology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510230, P.R. China
| | - Shike Zhang
- Department of Urology, Minimally Invasive Surgery Centre, Guangzhou Urology Research Institute, Guangdong Key Laboratory of Urology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510230, P.R. China
| | - Weizhou Wu
- Department of Urology, Minimally Invasive Surgery Centre, Guangzhou Urology Research Institute, Guangdong Key Laboratory of Urology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510230, P.R. China
| | - Hui Long
- Department of Pharmacy, Guangzhou Institute of Dermatology, Guangzhou, Guangdong 510095, P.R. China
| | - Xiaolu Duan
- Department of Urology, Minimally Invasive Surgery Centre, Guangzhou Urology Research Institute, Guangdong Key Laboratory of Urology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510230, P.R. China
| | - Yongchang Lai
- Department of Urology, The Eighth Affiliated Hospital, Sun Yat‑sen University, Shenzhen, Guangdong 518033, P.R. China
| | - Wenqi Wu
- Department of Urology, Minimally Invasive Surgery Centre, Guangzhou Urology Research Institute, Guangdong Key Laboratory of Urology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510230, P.R. China
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The Role of PARP1 in Monocyte and Macrophage Commitment and Specification: Future Perspectives and Limitations for the Treatment of Monocyte and Macrophage Relevant Diseases with PARP Inhibitors. Cells 2020; 9:cells9092040. [PMID: 32900001 PMCID: PMC7565932 DOI: 10.3390/cells9092040] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 09/04/2020] [Accepted: 09/04/2020] [Indexed: 12/13/2022] Open
Abstract
Modulation of PARP1 expression, changes in its enzymatic activity, post-translational modifications, and inflammasome-dependent cleavage play an important role in the development of monocytes and numerous subtypes of highly specialized macrophages. Transcription of PARP1 is governed by the proliferation status of cells at each step of their development. Higher abundance of PARP1 in embryonic stem cells and in hematopoietic precursors supports their self-renewal and pluri-/multipotency, whereas a low level of the enzyme in monocytes determines the pattern of surface receptors and signal transducers that are functionally linked to the NFκB pathway. In macrophages, the involvement of PARP1 in regulation of transcription, signaling, inflammasome activity, metabolism, and redox balance supports macrophage polarization towards the pro-inflammatory phenotype (M1), which drives host defense against pathogens. On the other hand, it seems to limit the development of a variety of subsets of anti-inflammatory myeloid effectors (M2), which help to remove tissue debris and achieve healing. PARP inhibitors, which prevent protein ADP-ribosylation, and PARP1‒DNA traps, which capture the enzyme on chromatin, may allow us to modulate immune responses and the development of particular cell types. They can be also effective in the treatment of monocytic leukemia and other cancers by reverting the anti- to the proinflammatory phenotype in tumor-associated macrophages.
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Luo C, Zhu X, Luo Q, Bu F, Huang C, Zhu J, Zhao J, Zhang W, Lin K, Hu C, Zong Z, Luo H, Huang J, Zhu Z. RBFOX3 Promotes Gastric Cancer Growth and Progression by Activating HTERT Signaling. Front Oncol 2020; 10:1044. [PMID: 32903312 PMCID: PMC7396657 DOI: 10.3389/fonc.2020.01044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 05/26/2020] [Indexed: 12/30/2022] Open
Abstract
Tumor invasion, metastasis, and recrudescence remain a considerable challenge in the treatment of gastric cancer (GC). Herein we first identified that RNA binding protein fox-1 homolog 3 (RBFOX3) was markedly overexpressed in GC tissues and negatively linked to the survival rate of GC patients. RBFOX3 promoted cell division and cell cycle progression in vitro and in vivo. Furthermore, RBFOX3 increased the cell invasion and migration ability. The suppression of GC cell multiplication and invasion, caused by silencing of RBFOX3, was rescued by HTERT overexpression. Additionally, RBFOX3 augmented the resistance of GC cells to 5-fluorouracil by repressing RBFOX3. Mechanistically, the exogenous up-regulation of RBFOX3 triggered promoter activity and HTERT expression, thereby enhancing the division and the development of GC cells. Further co-immunoprecipitation tests revealed that RBFOX3 bound to AP-2β to modulate HTERT expression. In conclusion, our study indicates that a high expression of RBFOX3 promotes GC progression and development and predicts worse prognosis. Collectively, these results indicate that the RBFOX3/AP-2β/HTERT signaling pathway can be therapeutically targeted to prevent and treat GC recurrence and metastasis.
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Affiliation(s)
- Chen Luo
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Department of Clinical Medical, Jiangxi Medical College of Nanchang University, Nanchang, China.,Jiangxi Province Key Laboratory of Molecular Medicine, Nanchang, China
| | - Xiaojian Zhu
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Department of Clinical Medical, Jiangxi Medical College of Nanchang University, Nanchang, China.,Jiangxi Province Key Laboratory of Molecular Medicine, Nanchang, China
| | - Qilin Luo
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Fanqin Bu
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Department of Clinical Medical, Jiangxi Medical College of Nanchang University, Nanchang, China.,Jiangxi Province Key Laboratory of Molecular Medicine, Nanchang, China
| | - Chao Huang
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Department of Clinical Medical, Jiangxi Medical College of Nanchang University, Nanchang, China.,Jiangxi Province Key Laboratory of Molecular Medicine, Nanchang, China
| | - Jingfeng Zhu
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Department of Clinical Medical, Jiangxi Medical College of Nanchang University, Nanchang, China.,Jiangxi Province Key Laboratory of Molecular Medicine, Nanchang, China
| | - Jiefeng Zhao
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Department of Clinical Medical, Jiangxi Medical College of Nanchang University, Nanchang, China.,Jiangxi Province Key Laboratory of Molecular Medicine, Nanchang, China
| | - Wenjun Zhang
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Department of Clinical Medical, Jiangxi Medical College of Nanchang University, Nanchang, China.,Jiangxi Province Key Laboratory of Molecular Medicine, Nanchang, China
| | - Kang Lin
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Department of Clinical Medical, Jiangxi Medical College of Nanchang University, Nanchang, China.,Jiangxi Province Key Laboratory of Molecular Medicine, Nanchang, China
| | - Cegui Hu
- Department of Clinical Medical, Jiangxi Medical College of Nanchang University, Nanchang, China.,Jiangxi Province Key Laboratory of Molecular Medicine, Nanchang, China
| | - Zeng Zong
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Jiangxi Province Key Laboratory of Molecular Medicine, Nanchang, China
| | - Hongliang Luo
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Jiangxi Province Key Laboratory of Molecular Medicine, Nanchang, China
| | - Jun Huang
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Zhengming Zhu
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China
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Martí JM, Fernández-Cortés M, Serrano-Sáenz S, Zamudio-Martinez E, Delgado-Bellido D, Garcia-Diaz A, Oliver FJ. The Multifactorial Role of PARP-1 in Tumor Microenvironment. Cancers (Basel) 2020; 12:cancers12030739. [PMID: 32245040 PMCID: PMC7140056 DOI: 10.3390/cancers12030739] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 03/03/2020] [Accepted: 03/15/2020] [Indexed: 02/08/2023] Open
Abstract
Poly(ADP-ribose) polymerases (PARPs), represent a family of 17 proteins implicated in a variety of cell functions; some of them possess the enzymatic ability to synthesize and attach poly (ADP-ribose) (also known as PAR) to different protein substrates by a post-translational modification; PARPs are key components in the cellular response to stress with consequences for different physiological and pathological events, especially during neoplasia. In recent years, using PARP inhibitors as antitumor agents has raised new challenges in understanding their role in tumor biology. Notably, the function of PARPs and PAR in the dynamic of tumor microenvironment is only starting to be understood. In this review, we summarized the conclusions arising from recent studies on the interaction between PARPs, PAR and key features of tumor microenvironment such as hypoxia, autophagy, tumor initiating cells, angiogenesis and cancer-associated immune response.
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Heo J, Noh B, Lee S, Lee H, Kim Y, Lim J, Ju H, Yu HY, Ryu C, Lee PCW, Jeong H, Oh Y, Kim K, Kim S, Son J, Hong B, Kim JS, Cho YM, Shin D. Phosphorylation of TFCP2L1 by CDK1 is required for stem cell pluripotency and bladder carcinogenesis. EMBO Mol Med 2020; 12:e10880. [PMID: 31709755 PMCID: PMC6949511 DOI: 10.15252/emmm.201910880] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 10/10/2019] [Accepted: 10/14/2019] [Indexed: 12/28/2022] Open
Abstract
Molecular programs involved in embryogenesis are frequently upregulated in oncogenic dedifferentiation and metastasis. However, their precise roles and regulatory mechanisms remain elusive. Here, we showed that CDK1 phosphorylation of TFCP2L1, a pluripotency-associated transcription factor, orchestrated pluripotency and cell-cycling in embryonic stem cells (ESCs) and was aberrantly activated in aggressive bladder cancers (BCs). In murine ESCs, the protein interactome and transcription targets of Tfcp2l1 indicated its involvement in cell cycle regulation. Tfcp2l1 was phosphorylated at Thr177 by Cdk1, which affected ESC cell cycle progression, pluripotency, and differentiation. The CDK1-TFCP2L1 pathway was activated in human BC cells, stimulating their proliferation, self-renewal, and invasion. Lack of TFCP2L1 phosphorylation impaired the tumorigenic potency of BC cells in a xenograft model. In patients with BC, high co-expression of TFCP2L1 and CDK1 was associated with unfavorable clinical characteristics including tumor grade, lymphovascular and muscularis propria invasion, and distant metastasis and was an independent prognostic factor for cancer-specific survival. These findings demonstrate the molecular and clinical significance of CDK1-mediated TFCP2L1 phosphorylation in stem cell pluripotency and in the tumorigenic stemness features associated with BC progression.
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Affiliation(s)
- Jinbeom Heo
- Department of Biomedical SciencesAsan Medical CenterUniversity of Ulsan College of MedicineSeoulKorea
- Department of PhysiologyUniversity of Ulsan College of MedicineSeoulKorea
| | - Byeong‐Joo Noh
- Department of PathologyGangneung Asan HospitalUniversity of Ulsan College of MedicineGangneungKorea
| | - Seungun Lee
- Department of Biomedical SciencesAsan Medical CenterUniversity of Ulsan College of MedicineSeoulKorea
- Department of PhysiologyUniversity of Ulsan College of MedicineSeoulKorea
| | - Hye‐Yeon Lee
- Department of Biomedical SciencesAsan Medical CenterUniversity of Ulsan College of MedicineSeoulKorea
- Department of PhysiologyUniversity of Ulsan College of MedicineSeoulKorea
| | - YongHwan Kim
- Department of Biomedical SciencesAsan Medical CenterUniversity of Ulsan College of MedicineSeoulKorea
- Department of PhysiologyUniversity of Ulsan College of MedicineSeoulKorea
| | - Jisun Lim
- Department of Biomedical SciencesAsan Medical CenterUniversity of Ulsan College of MedicineSeoulKorea
- Department of PhysiologyUniversity of Ulsan College of MedicineSeoulKorea
| | - Hyein Ju
- Department of Biomedical SciencesAsan Medical CenterUniversity of Ulsan College of MedicineSeoulKorea
- Department of PhysiologyUniversity of Ulsan College of MedicineSeoulKorea
| | - Hwan Yeul Yu
- Department of Biomedical SciencesAsan Medical CenterUniversity of Ulsan College of MedicineSeoulKorea
- Department of PhysiologyUniversity of Ulsan College of MedicineSeoulKorea
| | - Chae‐Min Ryu
- Department of Biomedical SciencesAsan Medical CenterUniversity of Ulsan College of MedicineSeoulKorea
- Department of PhysiologyUniversity of Ulsan College of MedicineSeoulKorea
| | - Peter CW Lee
- Department of Biomedical SciencesAsan Medical CenterUniversity of Ulsan College of MedicineSeoulKorea
| | - Hwangkyo Jeong
- Department of Convergence MedicineAsan Medical CenterUniversity of Ulsan College of MedicineSeoulKorea
| | - Yumi Oh
- Department of Convergence MedicineAsan Medical CenterUniversity of Ulsan College of MedicineSeoulKorea
| | - Kyunggon Kim
- Department of Convergence MedicineAsan Medical CenterUniversity of Ulsan College of MedicineSeoulKorea
| | - Sang‐Yeob Kim
- Department of Convergence MedicineAsan Medical CenterUniversity of Ulsan College of MedicineSeoulKorea
| | - Jaekyoung Son
- Department of Biomedical SciencesAsan Medical CenterUniversity of Ulsan College of MedicineSeoulKorea
| | - Bumsik Hong
- Department of UrologyAsan Medical CenterUniversity of Ulsan College of MedicineSeoulKorea
| | - Jong Soo Kim
- Department of Stem Cell BiologySchool of MedicineKonkuk UniversitySeoulKorea
| | - Yong Mee Cho
- Department of PathologyAsan Medical CenterUniversity of Ulsan College of MedicineSeoulKorea
| | - Dong‐Myung Shin
- Department of Biomedical SciencesAsan Medical CenterUniversity of Ulsan College of MedicineSeoulKorea
- Department of PhysiologyUniversity of Ulsan College of MedicineSeoulKorea
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31
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Imai H, Kusakabe KT, Kiso Y, Hattori S, Kai C, Ono E, Kano K. Induction of pluripotency in mammalian fibroblasts by cell fusion with mouse embryonic stem cells. Biochem Biophys Res Commun 2019; 521:24-30. [PMID: 31635800 DOI: 10.1016/j.bbrc.2019.10.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 10/01/2019] [Indexed: 01/01/2023]
Abstract
BACKGROUND Cell fusion is a phenomenon that is observed in various tissues in vivo, resulting in acquisition of physiological functions such as liver regeneration. Fused cells such as hybridomas have also been produced artificially in vitro. Furthermore, it has been reported that cellular reprogramming can be induced by cell fusion with stem cells. METHODS Fused cells between mammalian fibroblasts and mouse embryonic stem cells were produced by electrofusion methods. The phenotypes of each cell lines were analyzed after purifying the fused cells. RESULTS Colonies which are morphologically similar to mouse embryonic stem cells were observed in fused cells of rabbit, bovine, and zebra fibroblasts. RT-PCR analysis revealed that specific pluripotent marker genes that were never expressed in each mammalian fibroblast were strongly induced in the fused cells, which indicated that fusion with mouse embryonic stem cells can trigger reprogramming and acquisition of pluripotency in various mammalian somatic cells. CONCLUSIONS Our results can help elucidate the mechanism of pluripotency maintenance and the establishment of highly reprogrammed pluripotent stem cells in various mammalian species.
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Affiliation(s)
- Hiroyuki Imai
- Department of Biomedicine, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - Ken Takeshi Kusakabe
- Laboratory of Veterinary Anatomy, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - Yasuo Kiso
- Laboratory of Veterinary Anatomy, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - Shosaku Hattori
- Amami Laboratory of Injurious Animals, Institute of Medical Science, The University of Tokyo, Kagoshima, Japan
| | - Chieko Kai
- Amami Laboratory of Injurious Animals, Institute of Medical Science, The University of Tokyo, Kagoshima, Japan
| | - Etsuro Ono
- Department of Biomedicine, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - Kiyoshi Kano
- Laboratory of Veterinary Developmental Biology, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan.
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32
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Wang XB, Cui NH, Liu X, Ming L. Identification of a blood-based 12-gene signature that predicts the severity of coronary artery stenosis: An integrative approach based on gene network construction, Support Vector Machine algorithm, and multi-cohort validation. Atherosclerosis 2019; 291:34-43. [PMID: 31689620 DOI: 10.1016/j.atherosclerosis.2019.10.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 09/25/2019] [Accepted: 10/08/2019] [Indexed: 01/22/2023]
Abstract
BACKGROUND AND AIMS We aimed to identify a blood-based gene expression score (GES) to predict the severity of coronary artery stenosis in patients with known or suspected coronary artery disease (CAD) by integrative use of gene network construction, Support Vector Machine (SVM) algorithm, and multi-cohort validation. METHODS In the discovery phase, a public blood-based microarray dataset of 110 patients with known CAD was analyzed by weighted gene coexpression network analysis and protein-protein interaction network analysis to identify candidate hub genes. In the training set with 151 CAD patients, bioinformatically identified hub genes were experimentally verified by real-time polymerase chain reaction, and statistically filtered with the SVM algorithm to develop a GES. Internal and external validation of GES was performed in patients with suspected CAD from two validation cohorts (n = 209 and 206). RESULTS The discovery phase screened 15 network-centric hub genes significantly correlated with the Duke CAD Severity Index. In the training cohort, 12 of 15 hub genes were filtered to construct a blood-based GES12, which showed good discrimination for higher modified Gensini scores (AUC: 0.798 and 0.812), higher Sullivan Extent scores (AUC: 0.776 and 0.778), and the presence of obstructive CAD (AUC: 0.834 and 0.792) in two validation cohorts. A nomogram comprising GES12, smoking status, hypertension status, low density lipoprotein cholesterol level, and body mass index further improved performance, with respect to discrimination, risk classification, and clinical utility, for prediction of coronary stenosis severity. CONCLUSIONS GES12 is useful in predicting the severity of coronary artery stenosis in patients with known or suspected CAD.
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Affiliation(s)
- Xue-Bin Wang
- Department of Clinical Laboratory, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Ning-Hua Cui
- Zhengzhou Key Laboratory of Children's Infection and Immunity, Children's Hospital Affiliated to Zhengzhou University, Zhengzhou, China
| | - Xia'nan Liu
- Department of Clinical Laboratory, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Liang Ming
- Department of Clinical Laboratory, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
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33
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Li L, Yu S, Wu Q, Dou N, Li Y, Gao Y. KLF4-Mediated CDH3 Upregulation Suppresses Human Hepatoma Cell Growth and Migration via GSK-3β Signaling. Int J Biol Sci 2019; 15:953-961. [PMID: 31182916 PMCID: PMC6535787 DOI: 10.7150/ijbs.30857] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 02/07/2019] [Indexed: 12/25/2022] Open
Abstract
P-cadherin (CDH3), a classical cell adhesion molecule involved in tissue integrity and cell localization, has been implicated in many types of cancer. However, little is known about its function and regulatory mechanism in hepatocellular carcinoma (HCC). Here we report that CDH3 was positively regulated by kr¨uppel-like transcription factor 4 (KLF4), which is a crucial tumor suppressor gene in HCC, at mRNA level in HCC cell lines. Luciferase reporter assay and chromatin immunoprecipitation assay indicated that KLF4 directly bound to CDH3 promoter and transcriptionally activated CDH3 expression. Consistently, CDH3 expression was closely related with KLF4 expression in patients' samples and both proteins exhibited a downregulated expression pattern in cancer samples. Functionally, enforced CDH3 expression suppressed and silenced CDH3 expression promoted HCC cell growth and migration in vitro. Mechanistically, we observed that GSK-3β was regulated by CDH3 and may function as a possible downstream effector of CDH3. Knockdown of GSK-3β showed a similar phenotype with CDH3 silencing. Taken together, these findings establish the KLF4/CDH3/GSK-3β axis as an important regulatory mechanism in HCC development.
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Affiliation(s)
- Li Li
- Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Shijun Yu
- Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Qiong Wu
- Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Ning Dou
- Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Yandong Li
- Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China.,Research Center for Translational Medicine, Shanghai East Hospital, Shanghai 200120, China
| | - Yong Gao
- Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
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Park CS, Lewis A, Chen T, Lacorazza D. Concise Review: Regulation of Self-Renewal in Normal and Malignant Hematopoietic Stem Cells by Krüppel-Like Factor 4. Stem Cells Transl Med 2019; 8:568-574. [PMID: 30790473 PMCID: PMC6525558 DOI: 10.1002/sctm.18-0249] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 01/07/2019] [Indexed: 12/11/2022] Open
Abstract
Pluripotent and tissue‐specific stem cells, such as blood‐forming stem cells, are maintained through a balance of quiescence, self‐renewal, and differentiation. Self‐renewal is a specialized cell division that generates daughter cells with the same features as the parental stem cell. Although many factors are involved in the regulation of self‐renewal, perhaps the most well‐known factors are members of the Krüppel‐like factor (KLF) family, especially KLF4, because of the landmark discovery that this protein is required to reprogram somatic cells into induced pluripotent stem cells. Because KLF4 regulates gene expression through transcriptional activation or repression via either DNA binding or protein‐to‐protein interactions, the outcome of KLF4‐mediated regulation largely depends on the cellular context, cell cycle regulation, chromatin structure, and the presence of oncogenic drivers. This study first summarizes the current understanding of the regulation of self‐renewal by KLF proteins in embryonic stem cells through a KLF circuitry and then delves into the potential function of KLF4 in normal hematopoietic stem cells and its emerging role in leukemia‐initiating cells from pediatric patients with T‐cell acute lymphoblastic leukemia via repression of the mitogen‐activated protein kinase 7 pathway. stem cells translational medicine2019;8:568–574
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Affiliation(s)
- Chun S Park
- Department Pathology & Immunology, Baylor College of Medicine, Texas Children's Hospital, Houston, Texas, USA
| | - Andrew Lewis
- Department Pathology & Immunology, Baylor College of Medicine, Texas Children's Hospital, Houston, Texas, USA
| | - Taylor Chen
- Department Pathology & Immunology, Baylor College of Medicine, Texas Children's Hospital, Houston, Texas, USA
| | - Daniel Lacorazza
- Department Pathology & Immunology, Baylor College of Medicine, Texas Children's Hospital, Houston, Texas, USA
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35
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Hadzic M, Haveric S, Haveric A, Lojo-Kadric N, Galic B, Ramic J, Pojskic L. Bioflavonoids protect cells against halogenated boroxine-induced genotoxic damage by upregulation of hTERT expression. ACTA ACUST UNITED AC 2018; 74:125-129. [DOI: 10.1515/znc-2018-0132] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 11/23/2018] [Indexed: 12/22/2022]
Abstract
Abstract
Plant bioflavonoids are widely present in the human diet and have various protective properties. In this study, we have demonstrated the capacity of delphinidin and luteolin to increase human telomerase reverse transcriptase (hTERT) expression level and act as protective agents against halogenated boroxine-induced genotoxic damage. Halogenated boroxine K2(B3O3F4OH) (HB), is a novel compound with potential for the treatment of both benign and malignant skin changes. In vivo and in vitro studies have confirmed the inhibitory effects of HB on carcinoma cell proliferation and cell cycle progression as well as enzyme inhibition. However, minor genotoxic effects of HB are registered in higher applied concentrations, but those can be suppressed by in vitro addition of delphinidin and luteolin in appropriate concentrations. Fresh peripheral blood samples were cultivated for 72 h followed by independent and concomitant treatments of HB with luteolin or delphinidin. We analyzed the differences in relative hTERT expression between series of treatments compared with controls, which were based on normalized ratios with housekeeping genes. The obtained results have shown that selected bioflavonoids induce upregulation of hTERT that may contribute to the repair of genotoxic damage in vitro.
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Affiliation(s)
- Maida Hadzic
- Institute for Genetic Engineering and Biotechnology , University of Sarajevo , Zmaja od Bosne 8 , 71000 Sarajevo , Bosnia and Herzegovina
| | - Sanin Haveric
- Institute for Genetic Engineering and Biotechnology , University of Sarajevo , Zmaja od Bosne 8 , 71000 Sarajevo , Bosnia and Herzegovina
| | - Anja Haveric
- Institute for Genetic Engineering and Biotechnology , University of Sarajevo , Zmaja od Bosne 8 , 71000 Sarajevo , Bosnia and Herzegovina
| | - Naida Lojo-Kadric
- Institute for Genetic Engineering and Biotechnology , University of Sarajevo , Zmaja od Bosne 8 , 71000 Sarajevo , Bosnia and Herzegovina
| | - Borivoj Galic
- Faculty of Science, Department for Chemistry , University of Sarajevo , Zmaja od Bosne 33-35 , 71000 Sarajevo , Bosnia and Herzegovina
| | - Jasmin Ramic
- Institute for Genetic Engineering and Biotechnology , University of Sarajevo , Zmaja od Bosne 8 , 71000 Sarajevo , Bosnia and Herzegovina
| | - Lejla Pojskic
- Institute for Genetic Engineering and Biotechnology , University of Sarajevo , Zmaja od Bosne 8 , 71000 Sarajevo , Bosnia and Herzegovina
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Jose SS, Tidu F, Burilova P, Kepak T, Bendickova K, Fric J. The Telomerase Complex Directly Controls Hematopoietic Stem Cell Differentiation and Senescence in an Induced Pluripotent Stem Cell Model of Telomeropathy. Front Genet 2018; 9:345. [PMID: 30210531 PMCID: PMC6123533 DOI: 10.3389/fgene.2018.00345] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 08/09/2018] [Indexed: 01/16/2023] Open
Abstract
Telomeropathies are rare disorders associated with impaired telomere length control mechanisms that frequently result from genetic mutations in the telomerase complex. Dyskeratosis congenita is a congenital progressive telomeropathy in which mutation in the telomerase RNA component (TERC) impairs telomere maintenance leading to accelerated cellular senescence and clinical outcomes resembling premature aging. The most severe clinical feature is perturbed hematopoiesis and bone-marrow failure, but the underlying mechanisms are not fully understood. Here, we developed a model of telomerase function imbalance using shRNA to knockdown TERC expression in human induced pluripotent stem cells (iPSCs). We then promoted in vitro hematopoiesis in these cells to analyze the effects of TERC impairment. Reduced TERC expression impaired hematopoietic stem-cell (HSC) differentiation and increased the expression of cellular senescence markers and production of reactive oxygen species. Interestingly, telomere length was unaffected in shTERC knockdown iPSCs, leading to conclusion that the phenotype is controlled by non-telomeric functions of telomerase. We then assessed the effects of TERC-depletion in THP-1 myeloid cells and again observed reduced hematopoietic and myelopoietic differentiative potential. However, these cells exhibited impaired telomerase activity as verified by accelerated telomere shortening. shTERC-depleted iPSC-derived and THP-1-derived myeloid precursors had lower phagocytic capacity and increased ROS production, indicative of senescence. These findings were confirmed using a BIBR1532 TERT inhibitor, suggesting that these phenotypes are dependent on telomerase function but not directly linked to telomere length. These data provide a better understanding of the molecular processes driving the clinical signs of telomeropathies and identify novel roles of the telomerase complex other than regulating telomere length.
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Affiliation(s)
- Shyam Sushama Jose
- Cellular and Molecular Immunoregulation Group, Center for Translational Medicine, International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czechia.,Department of Biology, Faculty of Medicine, Masaryk University, Brno, Czechia
| | - Federico Tidu
- Cellular and Molecular Immunoregulation Group, Center for Translational Medicine, International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czechia.,Department of Biology, Faculty of Medicine, Masaryk University, Brno, Czechia
| | - Petra Burilova
- Cellular and Molecular Immunoregulation Group, Center for Translational Medicine, International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czechia.,Department of Biology, Faculty of Medicine, Masaryk University, Brno, Czechia
| | - Tomas Kepak
- Pediatric Oncology Translational Research, International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czechia.,Pediatric Hematology and Oncology, The University Hospital Brno, Brno, Czechia
| | - Kamila Bendickova
- Cellular and Molecular Immunoregulation Group, Center for Translational Medicine, International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czechia
| | - Jan Fric
- Cellular and Molecular Immunoregulation Group, Center for Translational Medicine, International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czechia
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37
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Targeting cancer stem cells and their niche: perspectives for future therapeutic targets and strategies. Semin Cancer Biol 2018; 53:139-155. [PMID: 30081228 DOI: 10.1016/j.semcancer.2018.08.002] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 07/30/2018] [Accepted: 08/02/2018] [Indexed: 02/07/2023]
Abstract
A small subpopulation of cells within the bulk of tumors share features with somatic stem cells, in that, they are capable of self-renewal, they differentiate, and are highly resistant to conventional therapy. These cells have been referred to as cancer stem cells (CSCs). Recent reports support the central importance of a cancer stem cell-like niche that appears to help foster the generation and maintenance of CSCs. In response to signals provided by this microenvironment, CSCs express the tumorigenic characteristics that can drive tumor metastasis by the induction of epithelial-mesenchymal-transition (EMT) that in turn fosters the migration and recolonization of the cells as secondary tumors within metastatic niches. We summarize here recent advances in cancer stem cell research including the characterization of their genetic and epigenetic features, metabolic specialities, and crosstalk with aging-associated processes. Potential strategies for targeting CSCs, and their niche, by regulating CSCs plasticity, or therapeutic sensitivity is discussed. Finally, it is hoped that new strategies and related therapeutic approaches as outlined here may help prevent the formation of the metastatic niche, as well as counter tumor progression and metastatic growth.
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Paul B, Li Y, Tollefsbol TO. The Effects of Combinatorial Genistein and Sulforaphane in Breast Tumor Inhibition: Role in Epigenetic Regulation. Int J Mol Sci 2018; 19:ijms19061754. [PMID: 29899271 PMCID: PMC6032337 DOI: 10.3390/ijms19061754] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 06/04/2018] [Accepted: 06/04/2018] [Indexed: 12/19/2022] Open
Abstract
Dietary compounds that possess the properties of altering epigenetic processes are gaining popularity as targets for cancer prevention studies. These compounds when administered at optimal concentrations and especially in combination can have enhanced effects in cancer prevention or therapy. It is important to study the interaction of two or more compounds in order to assess their role in enhancing prevention. Genistein (GEN), found in soy, has been extensively studied for its role as an epigenetic modifier especially as a DNA methyltransferase (DNMT) inhibitor and sulforaphane (SFN), found in cruciferous vegetables, is known as a histone deacetylase (HDAC) inhibitor. However, very little is known about the effects of these two compounds in conjunction in breast cancer prevention or therapy. In our current study, we determined that, at certain doses, the compounds have synergistic effects in decreasing cellular viability of breast cancer cell lines. Our results indicate that the combination of GEN and SFN is much more effective than their single doses in increasing the rate of apoptosis and lowering the colony forming potential of these cells. We determined that these compounds inhibit cell cycle progression to G2 phase in MDA-MB-231 and G1 phase in MCF-7 breast cancer cell lines. Additionally, we determined that the combination is effective as an HDAC and histone methyltransferase (HMT) inhibitor. Furthermore, we demonstrated that this combination downregulates the levels of HDAC2 and HDAC3 both at the mRNA and protein levels. We also found that these compounds have the potential to downregulate KLF4 levels, which plays an important role in stem cell formation. The combination of GEN and SFN is also effective in downregulating hTERT levels, which is known to be activated when KLF4 binds to its promoter region. Our hypothesis is further strengthened by in vivo studies, where the combination is administered to transgenic mice in the form of genistein and SFN-enriched broccoli sprouts. We have demonstrated that the combination is more effective in preventing or treating mammary cancer via extending tumor latency and reducing tumor volumes/sizes than either of these dietary components administered alone. These results are consistent with our in vitro study suggesting potential preventive and therapeutic effects of this novel dietary combinatorial approach against breast cancer.
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Affiliation(s)
- Bidisha Paul
- Department of Biology, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
| | - Yuanyuan Li
- Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
- Nutrition Obesity Research Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
- Department of Pharmacology and Toxicology, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
| | - Trygve O Tollefsbol
- Department of Biology, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
- Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
- Nutrition Obesity Research Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
- Comprehensive Diabetes Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
- Comprehensive Center for Healthy Aging, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
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Hsieh PN, Sweet DR, Fan L, Jain MK. Aging and the Krüppel-like factors. TRENDS IN CELL & MOLECULAR BIOLOGY 2017; 12:1-15. [PMID: 29416266 PMCID: PMC5798252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The mammalian Krüppel-like factors (KLFs) are a family of zinc-finger containing transcription factors with diverse patterns of expression and a wide array of cellular functions. While their roles in mammalian physiology are well known, there is a growing appreciation for their roles in modulating the fundamental progression of aging. Here we review the current knowledge of Krüppel-like factors with a focus on their roles in processes regulating aging and age-associated diseases.
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Affiliation(s)
- Paishiun N. Hsieh
- Case Cardiovascular Research Institute, Case Western Reserve University, and Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
- Department of Pathology, Case Western Reserve University, Cleveland, OH, USA
| | - David R. Sweet
- Case Cardiovascular Research Institute, Case Western Reserve University, and Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
- Department of Pathology, Case Western Reserve University, Cleveland, OH, USA
| | - Liyan Fan
- Case Cardiovascular Research Institute, Case Western Reserve University, and Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
- Department of Pathology, Case Western Reserve University, Cleveland, OH, USA
| | - Mukesh K. Jain
- Case Cardiovascular Research Institute, Case Western Reserve University, and Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
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