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Wu G, Wu X, Wu Y, Wu Y, Li H, Dai C. Comprehensive transcriptomic profiling of T-2 toxin-induced nephrotoxicity in mice. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 284:116909. [PMID: 39178761 DOI: 10.1016/j.ecoenv.2024.116909] [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: 05/17/2024] [Revised: 08/07/2024] [Accepted: 08/19/2024] [Indexed: 08/26/2024]
Abstract
T-2 toxin, a trichothecene mycotoxin, is an important environmental pollutant that poses a threat globally to the health of humans and animals. It has been found to induce nephrotoxicity; however, the precise molecular mechanism involved remains unclear. In this study, mice were administered at a single dose of 2 mg/kg body weight T-2 toxin intraperitoneally, and kidney function and ultrastructural observations were assessed after 1 d, 3 d, and 7 d. Histopathological findings revealed that exposure to T-2 toxin caused noticeable tubular degeneration, necrosis and epithelial cell shedding in mouse kidneys. Transmission electron microscopy indicated that exposure to T-2 toxin caused mitochondrial swelling and vacuolization. Transcriptomic data revealed significant differences in the expression of 1122, 58, and 391 genes in kidney tissues 1 d, 3 d, or 7 d after T-2 toxin exposure, respectively. Moreover, after 1 d, the downregulated differentially expressed genes (DEGs) were found to be involved in the cell cycle, p53 signaling, and cellular senescence pathways, while the upregulated DEGs were found to be associated with the ribosomal pathway. Temporal changes in gene expression patterns (i.e., after 3 d and 7 d) and disturbances in cellular metabolism during the recovery period (7 d) were detected in mouse kidneys after exposure to T-2 toxin. In conclusion, this study is the first to provide a comprehensive comparative transcriptomic analysis of T-2 toxin exposure-induced nephrotoxicity-related gene regulation at different time points and to investigate the mechanism underlying the nephrotoxicity of T-2 toxin at the mRNA expression level.
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Affiliation(s)
- Guoquan Wu
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Xuan Wu
- Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning, Beijing Center for Disease Prevention and Control, Beijing 100013, China; School of Public Health, Capital Medical University, Beijing 100069, China
| | - Yige Wu
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Yuping Wu
- College of Life Science and Basic Medicine, Center for Biotechnology Research, Xinxiang University, Xinxiang, Henan 453003, China
| | - Hui Li
- Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning, Beijing Center for Disease Prevention and Control, Beijing 100013, China; School of Public Health, Capital Medical University, Beijing 100069, China.
| | - Chongshan Dai
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China.
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Chen B, Wang F, Zhang Y, Liu F. PTEN-mediated FOXO signaling affects autophagy, migration and invasion of rheumatoid arthritis fibroblast-like synoviocytes. Tissue Cell 2024; 86:102278. [PMID: 38029456 DOI: 10.1016/j.tice.2023.102278] [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: 08/29/2023] [Revised: 11/13/2023] [Accepted: 11/17/2023] [Indexed: 12/01/2023]
Abstract
Rheumatoid arthritis (RA) is a chronic, progressive, systemic autoimmune disease. Among them, abnormal proliferation, migration and vascularization of fibroblast-like synoviocytes (FLS) are the main pathological basis of persistent synovitis and bone destruction in RA. In the current study, we attempted to find effective molecular mechanisms for the treatment of RA by investigating RA-FLS. Firstly, the study was conducted to identify the potential target gene PTEN and its related signaling pathway through bioinformatics analysis. Subsequently, the target gene PTEN overexpression was regulated by cell transfection. The expression of FOXO signaling factors and autophagy-related proteins were detected by western blotting assay. Cell proliferation was measured by CCK-8 and EdU assays. Inflammation level was detected by ELISA. Cell migration and invasion were detected using wound healing assay and transwell chamber assay, respectively. Cell apoptosis was detected using flow cytometry. The results showed that overexpression of PTEN activated FOXO1 signaling in RA-FLS, and regulated autophagy, proliferation, invasion, migration, and the levels of pro-inflammatory factors in the disease. In conclusion, PTEN might provide an effective therapeutic strategy for rheumatoid arthritis by mediating the FOXO1 signaling pathway.
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Affiliation(s)
- Bojie Chen
- Department of joint surgery, The Affiliated Ganzhou Hospital of Nanchang University, Ganzhou, Jiangxi 341000, PR China
| | - Fuqiang Wang
- Department of joint surgery, The Affiliated Ganzhou Hospital of Nanchang University, Ganzhou, Jiangxi 341000, PR China
| | - Yun Zhang
- Department of joint surgery, The Affiliated Ganzhou Hospital of Nanchang University, Ganzhou, Jiangxi 341000, PR China
| | - Fang Liu
- Department of otorhinolaryngology head and neck surgery, First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi 341000, PR China.
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3
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Ghareghomi S, Moosavi-Movahedi F, Saso L, Habibi-Rezaei M, Khatibi A, Hong J, Moosavi-Movahedi AA. Modulation of Nrf2/HO-1 by Natural Compounds in Lung Cancer. Antioxidants (Basel) 2023; 12:antiox12030735. [PMID: 36978983 PMCID: PMC10044870 DOI: 10.3390/antiox12030735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Revised: 03/08/2023] [Accepted: 03/13/2023] [Indexed: 03/19/2023] Open
Abstract
Oxidative stresses (OSs) are considered a pivotal factor in creating various pathophysiological conditions. Cells have been able to move forward by modulating numerous signaling pathways to moderate the defects of these stresses during their evolution. The company of Kelch-like ECH-associated protein 1 (Keap1) as a molecular sensing element of the oxidative and electrophilic stress and nuclear factor erythroid 2 (NF-E2)-related factor 2 (Nrf2) as a master transcriptional regulator of the antioxidant response makes a master cytoprotective antioxidant pathway known as the Keap1/Nrf2 pathway. This pathway is considered a dual-edged sword with beneficial features for both normal and cancer cells by regulating the gene expression of the array of endogenous antioxidant enzymes. Heme oxygenase-1 (HO-1), a critical enzyme in toxic heme removal, is one of the clear state indicators for the duality of this pathway. Therefore, Nrf2/HO-1 axis targeting is known as a novel strategy for cancer treatment. In this review, the molecular mechanism of action of natural antioxidants on lung cancer cells has been investigated by relying on the Nrf2/HO-1 axis.
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Affiliation(s)
- Somayyeh Ghareghomi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran 1417466191, Iran; (S.G.); (F.M.-M.)
| | - Faezeh Moosavi-Movahedi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran 1417466191, Iran; (S.G.); (F.M.-M.)
| | - Luciano Saso
- Department of Physiology and Pharmacology “Vittorio Erspamer”, Sapienza University of Rome, 00185 Rome, Italy
- Correspondence: (L.S.); (M.H.-R.); (A.A.M.-M.); Tel.: +39-06-4991-2481 (L.S.); +98-21-6111-3214 (M.H.-R.); +98-21-6640-3957 (A.A.M.-M.); Fax: +39-06-4991-2481 (L.S.); +98-21-6697-1941 (M.H.-R.); +98-21-6640-4680(A.A.M.-M.)
| | - Mehran Habibi-Rezaei
- School of Biology, College of Science, University of Tehran, Tehran 1417466191, Iran
- Center of Excellence in NanoBiomedicine, University of Tehran, Tehran 1417466191, Iran
- Correspondence: (L.S.); (M.H.-R.); (A.A.M.-M.); Tel.: +39-06-4991-2481 (L.S.); +98-21-6111-3214 (M.H.-R.); +98-21-6640-3957 (A.A.M.-M.); Fax: +39-06-4991-2481 (L.S.); +98-21-6697-1941 (M.H.-R.); +98-21-6640-4680(A.A.M.-M.)
| | - Ali Khatibi
- Department of Biotechnology, Faculty of Biological Sciences, Alzahra University, Tehran 1993893973, Iran;
| | - Jun Hong
- School of Life Sciences, Henan University, Kaifeng 475000, China;
| | - Ali A. Moosavi-Movahedi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran 1417466191, Iran; (S.G.); (F.M.-M.)
- UNESCO Chair on Interdisciplinary Research in Diabetes, University of Tehran, Tehran 1417466191, Iran
- Correspondence: (L.S.); (M.H.-R.); (A.A.M.-M.); Tel.: +39-06-4991-2481 (L.S.); +98-21-6111-3214 (M.H.-R.); +98-21-6640-3957 (A.A.M.-M.); Fax: +39-06-4991-2481 (L.S.); +98-21-6697-1941 (M.H.-R.); +98-21-6640-4680(A.A.M.-M.)
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4
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The Interplay between the Cellular Response to DNA Double-Strand Breaks and Estrogen. Cells 2022; 11:cells11193097. [PMID: 36231059 PMCID: PMC9563627 DOI: 10.3390/cells11193097] [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: 09/05/2022] [Revised: 09/28/2022] [Accepted: 09/29/2022] [Indexed: 11/17/2022] Open
Abstract
Cancer development is often connected to impaired DNA repair and DNA damage signaling pathways. The presence of DNA damage in cells activates DNA damage response, which is a complex cellular signaling network that includes DNA repair, activation of the cell cycle checkpoints, cellular senescence, and apoptosis. DNA double-strand breaks (DSBs) are toxic lesions that are mainly repaired by the non-homologous end joining and homologous recombination repair (HRR) pathways. Estrogen-dependent cancers, like breast and ovarian cancers, are frequently associated with mutations in genes that play a role in HRR. The female sex hormone estrogen binds and activates the estrogen receptors (ERs), ERα, ERβ and G-protein-coupled ER 1 (GPER1). ERα drives proliferation, while ERβ inhibits cell growth. Estrogen regulates the transcription, stability and activity of numerus DDR factors and DDR factors in turn modulate ERα expression, stability and transcriptional activity. Additionally, estrogen stimulates DSB formation in cells as part of its metabolism and proliferative effect. In this review, we will present an overview on the crosstalk between estrogen and the cellular response to DSBs. We will discuss how estrogen regulates DSB signaling and repair, and how DDR factors modulate the expression, stability and activity of estrogen. We will also discuss how the regulation of HRR genes by estrogen promotes the development of estrogen-dependent cancers.
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Ren CZ, Wu ZT, Wang W, Tan X, Yang YH, Wang YK, Li ML, Wang WZ. SIRT1 exerts anti-hypertensive effect via FOXO1 activation in the rostral ventrolateral medulla. Free Radic Biol Med 2022; 188:1-13. [PMID: 35688305 DOI: 10.1016/j.freeradbiomed.2022.06.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 05/05/2022] [Accepted: 06/02/2022] [Indexed: 12/09/2022]
Abstract
The rostral ventrolateral medulla (RVLM) is a pivotal region in the central regulation of blood pressure (BP). It has been documented that silent information regulator 2 homolog 1 (SIRT1), a nicotinamide adenine dinucleotide (NAD+)-dependent multifunctional transcription regulatory factor, has many cardiovascular protective effects. However, the role and significance of SIRT1 in the central regulation of cardiovascular activity, especially in RVLM, remains unknown. Therefore, the aim of this study was to explore the role and underlying mechanism of SIRT1 in the central regulation of cardiovascular activity in hypertension. Spontaneously hypertensive rats (SHRs) were given resveratrol (RSV) via intracerebroventricular (ICV) infusion or injected with SIRT1-overexpressing lentiviral vectors into the RVLM. In vitro experiments, angiotensin II (Ang II)-induced rat pheochromocytoma cell line (PC12 cells) were transfected with forkhead box protein O1 (FOXO1) small interfering RNA (siRNA) before treatment with RSV. Our results showed that SIRT1 activation with RSV or overexpression in the RVLM significantly decreased BP and sympathetic outflow of SHRs. Furthermore, SIRT1 overexpression in the RVLM significantly decreased reactive oxygen species (ROS) production and facilitated the forkhead box protein O1 (FOXO1) activation, accompanied by upregulation of the ROS-detoxifying enzyme superoxide dismutases 1 (SOD1) in the RVLM of SHRs. In PC12 cells, it was found that Ang II could induce oxidative stress and downregulate the SIRT1-FOXO1-SOD1 signaling pathway, which indicated that the suppressed expression of SIRT1 in the RVLM of SHRs might relate to the elevated central Ang II level. Furthermore, the enhanced oxidative stress and decreased SIRT1-FOXO1-SOD1 axis induced by Ang II were restored by treatment with RSV. However, these favorable effects mediated by SIRT1 activation were blocked by FOXO1 knockdown. Based on these findings, we concluded that SIRT1 activation or overexpression in the RVLM exerts anti-hypertensive effect through reducing oxidative stress via SIRT1-FOXO1-SOD1 signaling pathway, which providing a new target for the prevention and intervention of hypertension.
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Affiliation(s)
- Chang-Zhen Ren
- Department of Marine Biomedicine and Polar Medicine, Naval Medical Center of PLA, Naval Medical University (Second Military Medical University), Shanghai, 200433, China; Department of General Practice, 960th Hospital of PLA, Jinan, 250031, China
| | - Zhao-Tang Wu
- Department of Marine Biomedicine and Polar Medicine, Naval Medical Center of PLA, Naval Medical University (Second Military Medical University), Shanghai, 200433, China
| | - Wen Wang
- Department of Marine Biomedicine and Polar Medicine, Naval Medical Center of PLA, Naval Medical University (Second Military Medical University), Shanghai, 200433, China
| | - Xing Tan
- Department of Marine Biomedicine and Polar Medicine, Naval Medical Center of PLA, Naval Medical University (Second Military Medical University), Shanghai, 200433, China
| | - Ya-Hong Yang
- Department of Marine Biomedicine and Polar Medicine, Naval Medical Center of PLA, Naval Medical University (Second Military Medical University), Shanghai, 200433, China
| | - Yang-Kai Wang
- Department of Marine Biomedicine and Polar Medicine, Naval Medical Center of PLA, Naval Medical University (Second Military Medical University), Shanghai, 200433, China
| | - Miao-Ling Li
- Key Laboratory of Medical Electrophysiology, Ministry of Education, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, 646000, China.
| | - Wei-Zhong Wang
- Department of Marine Biomedicine and Polar Medicine, Naval Medical Center of PLA, Naval Medical University (Second Military Medical University), Shanghai, 200433, China.
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6
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Farhan M, Silva M, Li S, Yan F, Fang J, Peng T, Hu J, Tsao M, Little P, Zheng W. The role of FOXOs and autophagy in cancer and metastasis-Implications in therapeutic development. Med Res Rev 2020; 40:2089-2113. [PMID: 32474970 PMCID: PMC7586888 DOI: 10.1002/med.21695] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 04/21/2020] [Accepted: 05/16/2020] [Indexed: 12/17/2022]
Abstract
Autophagy is a highly conserved intracellular degradation process that plays a crucial role in cell survival and stress reactions as well as in cancer development and metastasis. Autophagy process involves several steps including sequestration, fusion of autophagosomes with lysosomes and degradation. Forkhead box O (FOXO) transcription factors regulate the expression of genes involved in cellular metabolic activity and signaling pathways of cancer growth and metastasis. Recent evidence suggests that FOXO proteins are also involved in autophagy regulation. The relationship among FOXOs, autophagy, and cancer has been drawing attention of many who work in the field. This study summarizes the role of FOXO proteins and autophagy in cancer growth and metastasis and analyzes their potential roles in cancer disease management.
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Affiliation(s)
- Mohd Farhan
- Faculty of Health SciencesCentre of Reproduction, Development and Aging, Institute of Translational Medicine, University of MacauTaipaMacau SARChina
| | - Marta Silva
- Faculty of Health SciencesCentre of Reproduction, Development and Aging, Institute of Translational Medicine, University of MacauTaipaMacau SARChina
| | - Shuai Li
- Faculty of Health SciencesCentre of Reproduction, Development and Aging, Institute of Translational Medicine, University of MacauTaipaMacau SARChina
| | - Fengxia Yan
- Department of MedicineJinan UniversityGuangzhouChina
| | - Jiankang Fang
- Faculty of Health SciencesCentre of Reproduction, Development and Aging, Institute of Translational Medicine, University of MacauTaipaMacau SARChina
| | - Tangming Peng
- Faculty of Health SciencesCentre of Reproduction, Development and Aging, Institute of Translational Medicine, University of MacauTaipaMacau SARChina
| | - Jim Hu
- Department of Laboratory Medicine and PathobiologyUniversity of TorontoTorontoOntarioCanada
| | - Ming‐Sound Tsao
- Department of Laboratory Medicine and PathobiologyUniversity of TorontoTorontoOntarioCanada
| | - Peter Little
- School of Pharmacy, Pharmacy Australia Centre of Excellence, The University of QueenslandWoolloongabbaQueenslandAustralia
| | - Wenhua Zheng
- Faculty of Health SciencesCentre of Reproduction, Development and Aging, Institute of Translational Medicine, University of MacauTaipaMacau SARChina
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7
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White RR, Maslov AY, Lee M, Wilner SE, Levy M, Vijg J. FOXO3a acts to suppress DNA double-strand break-induced mutations. Aging Cell 2020; 19:e13184. [PMID: 32720744 PMCID: PMC7511859 DOI: 10.1111/acel.13184] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 04/24/2020] [Accepted: 06/06/2020] [Indexed: 11/27/2022] Open
Abstract
Genomic instability is one of the hallmarks of aging, and both DNA damage and mutations have been found to accumulate with age in different species. Certain gene families, such as sirtuins and the FoxO family of transcription factors, have been shown to play a role in lifespan extension. However, the mechanism(s) underlying the increased longevity associated with these genes remains largely unknown and may involve the regulation of responses to cellular stressors, such as DNA damage. Here, we report that FOXO3a reduces genomic instability in cultured mouse embryonic fibroblasts (MEFs) treated with agents that induce DNA double-strand breaks (DSBs), that is, clastogens. We show that DSB treatment of both primary human and mouse fibroblasts upregulates FOXO3a expression. FOXO3a ablation in MEFs harboring the mutational reporter gene lacZ resulted in an increase in genome rearrangements after bleomycin treatment; conversely, overexpression of human FOXO3a was found to suppress mutation accumulation in response to bleomycin. We also show that overexpression of FOXO3a in human primary fibroblasts decreases DSB-induced γH2AX foci. Knocking out FOXO3a in mES cells increased the frequency of homologous recombination and non-homologous end-joining events. These results provide the first direct evidence that FOXO3a plays a role in suppressing genome instability, possibly by suppressing genome rearrangements.
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Affiliation(s)
- Ryan R. White
- Department of GeneticsAlbert Einstein College of MedicineBronxNew YorkUSA
| | | | - Moonsook Lee
- Department of GeneticsAlbert Einstein College of MedicineBronxNew YorkUSA
| | - Samantha E. Wilner
- Department of BiochemistryAlbert Einstein College of MedicineBronxNew YorkUSA
- Present address:
Chemistry DepartmentUrsinus CollegeCollegevillePennsylvaniaUSA
| | - Matthew Levy
- Department of BiochemistryAlbert Einstein College of MedicineBronxNew YorkUSA
- Present address:
Vitrisa TherapeuticsDurhamNorth CarolinaUSA
| | - Jan Vijg
- Department of GeneticsAlbert Einstein College of MedicineBronxNew YorkUSA
- Center for Single‐Cell Omics in Aging and DiseaseSchool of Public HealthShanghai Jiao Tong University School of MedicineShanghaiChina
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8
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Bach DH, Long NP, Luu TTT, Anh NH, Kwon SW, Lee SK. The Dominant Role of Forkhead Box Proteins in Cancer. Int J Mol Sci 2018; 19:E3279. [PMID: 30360388 PMCID: PMC6213973 DOI: 10.3390/ijms19103279] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 10/19/2018] [Accepted: 10/20/2018] [Indexed: 12/16/2022] Open
Abstract
Forkhead box (FOX) proteins are multifaceted transcription factors that are significantly implicated in cancer, with various critical roles in biological processes. Herein, we provide an overview of several key members of the FOXA, FOXC, FOXM1, FOXO and FOXP subfamilies. Important pathophysiological processes of FOX transcription factors at multiple levels in a context-dependent manner are discussed. We also specifically summarize some major aspects of FOX transcription factors in association with cancer research such as drug resistance, tumor growth, genomic alterations or drivers of initiation. Finally, we suggest that targeting FOX proteins may be a potential therapeutic strategy to combat cancer.
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Affiliation(s)
- Duc-Hiep Bach
- College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | | | | | - Nguyen Hoang Anh
- College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - Sung Won Kwon
- College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - Sang Kook Lee
- College of Pharmacy, Seoul National University, Seoul 08826, Korea.
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9
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Malo ME, Postnikoff SDL, Arnason TG, Harkness TAA. Mitotic degradation of yeast Fkh1 by the Anaphase Promoting Complex is required for normal longevity, genomic stability and stress resistance. Aging (Albany NY) 2017; 8:810-30. [PMID: 27099939 PMCID: PMC4925830 DOI: 10.18632/aging.100949] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Accepted: 04/03/2016] [Indexed: 02/07/2023]
Abstract
The Saccharomyces cerevisiae Forkhead Box (Fox) orthologs, Forkheads (Fkh) 1 and 2, are conserved transcription factors required for stress response, cell cycle progression and longevity. These yeast proteins play a key role in mitotic progression through activation of the ubiquitin E3 ligase Anaphase Promoting Complex (APC) via transcriptional control. Here, we used genetic and molecular analyses to demonstrate that the APC E3 activity is necessary for mitotic Fkh1 protein degradation and subsequent cell cycle progression. We report that Fkh1 protein degradation occurs specifically during mitosis, requires APCCdc20 and proteasome activity, and that a stable Fkh1 mutant reduces normal chronological lifespan, increases genomic instability, and increases sensitivity to stress. Our data supports a model whereby cell cycle progression through mitosis and G1 requires the targeted degradation of Fkh1 by the APC. This is significant to many fields as these results impact our understanding of the mechanisms underpinning the control of aging and cancer.
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Affiliation(s)
- Mackenzie E Malo
- Department of Anatomy and Cell Biology, University of Saskatchewan, Saskatchewan S7N 5E5, Canada
| | - Spike D L Postnikoff
- Department of Anatomy and Cell Biology, University of Saskatchewan, Saskatchewan S7N 5E5, Canada
| | - Terra G Arnason
- Department of Anatomy and Cell Biology, University of Saskatchewan, Saskatchewan S7N 5E5, Canada.,Department of Medicine, University of Saskatchewan, Saskatchewan S7N 5E5, Canada
| | - Troy A A Harkness
- Department of Anatomy and Cell Biology, University of Saskatchewan, Saskatchewan S7N 5E5, Canada
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10
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Zhang Y, Jia L, Zhang Y, Ji W, Li H. Higher expression of FOXOs correlates to better prognosis of bladder cancer. Oncotarget 2017; 8:96313-96322. [PMID: 29221208 PMCID: PMC5707102 DOI: 10.18632/oncotarget.22029] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Accepted: 09/24/2017] [Indexed: 02/07/2023] Open
Abstract
Background We aimed to explore the expression of forkhead box class O (FOXO) and relations between expressions of FOXOs and clinicopathological characteristics and prognosis of bladder cancer. Methods We enrolled a cohort of 276 patients with bladder cancer in our study. Expressions of FOXOs in bladder cancer tissue and adjacent tissue were measured by quantitative real-time polymerase chain reaction (qRT-PCR) and immunohistochemistry (IHC). Correlations between expression of FOXOs and clinicopathological characteristics and prognosis were analyzed. The relationship between expression of FOXOs and survival time of patients with bladder cancer was analyzed by the Kaplan-Meier survival analysis and the Log-rank test; individual variables which may affect the prognosis of bladder cancer were detected by the Cox proportional hazard regression model. Results Compared with bladder cancer tissue, a higher expression of FOXOs was detected in paracancerous tissue. We found significant associations between histological grade and the expressions of FOXOs, clinical stage and the expressions of FOXOs, and lymph node metastasis and the expressions of FOXOs (all P < 0.05). When used for diagnosing bladder cancer, the mRNA expression of FOXO1/3/4 produced cut off values of 1.475, 1.305, and 1.295, respectively, exhibiting relatively high specificity and sensitivity. The Kaplan-Meier curves indicated that patients with a higher expression of FOXOs tended to have a longer overall survival than those with lower expression. The Cox regression analysis revealed that lymph node metastasis, high clinical stage, and low expression of FOXOs were independent risk factors for bladder cancer prognosis. Conclusion Our results indicate that the expression of FOXOs is closely correlated with clinicopathological characteristics and prognosis of bladder cancer.
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Affiliation(s)
- Ying Zhang
- Department of Pathology, China-Japan Union Hospital of Jilin University, Changchun 130033, P.R. China
| | - Linpei Jia
- Department of Nephrology, Xuanwu Hospital, Capital Medical University, Beijing 100000, P.R. China
| | - Ying Zhang
- Department of Neurology, First Hospital of Jilin University, Changchun 130021, P.R. China
| | - Wei Ji
- Department of Vascular Surgery, Jilin Provincial People's Hospital, Changchun 130000, P.R. China
| | - Hai Li
- Department of Urology, China-Japan Union Hospital of Jilin University, Changchun 130033, P.R. China
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11
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Ren J, Yang L, Zhu L, Xu X, Ceylan AF, Guo W, Yang J, Zhang Y. Akt2 ablation prolongs life span and improves myocardial contractile function with adaptive cardiac remodeling: role of Sirt1-mediated autophagy regulation. Aging Cell 2017; 16:976-987. [PMID: 28681509 PMCID: PMC5595687 DOI: 10.1111/acel.12616] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/17/2017] [Indexed: 12/12/2022] Open
Abstract
Aging is accompanied with unfavorable geometric and functional changes in the heart involving dysregulation of Akt and autophagy. This study examined the impact of Akt2 ablation on life span and cardiac aging as well as the mechanisms involved with a focus on autophagy and mitochondrial integrity. Cardiac geometry, contractile, and intracellular Ca2+ properties were evaluated using echocardiography, IonOptix® edge-detection and fura-2 techniques. Levels of Sirt1, mitochondrial integrity, autophagy, and mitophagy markers were evaluated using Western blot. Our results revealed that Akt2 ablation prolonged life span (by 9.1%) and alleviated aging (24 months)-induced unfavorable changes in myocardial function and intracellular Ca2+ handling (SERCA2a oxidation) albeit with more pronounced cardiac hypertrophy (58.1%, 47.8%, and 14.5% rises in heart weight, wall thickness, and cardiomyocyte cross-sectional area). Aging downregulated levels of Sirt1, increased phosphorylation of Akt, and the nuclear transcriptional factor Foxo1, as well as facilitated acetylation of Foxo1, the effects of which (except Sirt1 and Foxo1 acetylation) were significantly attenuated or negated by Akt2 ablation. Advanced aging disturbed autophagy, mitophagy, and mitochondrial integrity as evidenced by increased p62, decreased levels of beclin-1, Atg7, LC3B, BNIP3, PTEN-induced putative kinase 1 (PINK1), Parkin, UCP-2, PGC-1α, and aconitase activity, the effects of which were reversed by Akt2 ablation. Aging-induced cardiomyocyte contractile dysfunction and loss of mitophagy were improved by rapamycin and the Sirt1 activator SRT1720. Activation of Akt using insulin or Parkin deficiency prevented SRT1720-induced beneficial effects against aging. In conclusion, our data indicate that Akt2 ablation protects against cardiac aging through restored Foxo1-related autophagy and mitochondrial integrity.
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Affiliation(s)
- Jun Ren
- Department of Cardiology and Shanghai Institute of Cardiovascular DiseasesZhongshan HospitalFudan UniversityShanghai200032China
- Center for Cardiovascular Research and Integrative MedicineSchool of PharmacyUniversity of WyomingLaramieWY82071USA
| | - Lifang Yang
- Center for Cardiovascular Research and Integrative MedicineSchool of PharmacyUniversity of WyomingLaramieWY82071USA
- Department of AnesthesiologyXi'an Children HospitalXi'an710003China
| | - Li Zhu
- Department of Cardiology and Shanghai Institute of Cardiovascular DiseasesZhongshan HospitalFudan UniversityShanghai200032China
| | - Xihui Xu
- Center for Cardiovascular Research and Integrative MedicineSchool of PharmacyUniversity of WyomingLaramieWY82071USA
| | - Asli F. Ceylan
- Center for Cardiovascular Research and Integrative MedicineSchool of PharmacyUniversity of WyomingLaramieWY82071USA
| | - Wei Guo
- Department of Animal SciencesUniversity of WyomingLaramieWY82071USA
| | - Jian Yang
- Department of Cardiovascular SurgeryXijing HospitalFourth Military Medical UniversityXi'an710032China
| | - Yingmei Zhang
- Department of Cardiology and Shanghai Institute of Cardiovascular DiseasesZhongshan HospitalFudan UniversityShanghai200032China
- Center for Cardiovascular Research and Integrative MedicineSchool of PharmacyUniversity of WyomingLaramieWY82071USA
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Imperatore F, Maurizio J, Vargas Aguilar S, Busch CJ, Favret J, Kowenz-Leutz E, Cathou W, Gentek R, Perrin P, Leutz A, Berruyer C, Sieweke MH. SIRT1 regulates macrophage self-renewal. EMBO J 2017; 36:2353-2372. [PMID: 28701484 DOI: 10.15252/embj.201695737] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 05/30/2017] [Accepted: 06/02/2017] [Indexed: 12/21/2022] Open
Abstract
Mature differentiated macrophages can self-maintain by local proliferation in tissues and can be extensively expanded in culture under specific conditions, but the mechanisms of this phenomenon remain only partially defined. Here, we show that SIRT1, an evolutionary conserved regulator of life span, positively affects macrophage self-renewal ability in vitro and in vivo Overexpression of SIRT1 during bone marrow-derived macrophage differentiation increased their proliferative capacity. Conversely, decrease of SIRT1 expression by shRNA inactivation, CRISPR/Cas9 mediated deletion and pharmacological inhibition restricted macrophage self-renewal in culture. Furthermore, pharmacological SIRT1 inhibition in vivo reduced steady state and cytokine-induced proliferation of alveolar and peritoneal macrophages. Mechanistically, SIRT1 inhibition negatively regulated G1/S transition, cell cycle progression and a network of self-renewal genes. This included inhibition of E2F1 and Myc and concomitant activation of FoxO1, SIRT1 targets mediating cell cycle progression and stress response, respectively. Our findings indicate that SIRT1 is a key regulator of macrophage self-renewal that integrates cell cycle and longevity pathways. This suggests that macrophage self-renewal might be a relevant parameter of ageing.
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Affiliation(s)
| | - Julien Maurizio
- Aix Marseille Université, CNRS, INSERM, CIML, Marseille, France
| | - Stephanie Vargas Aguilar
- Aix Marseille Université, CNRS, INSERM, CIML, Marseille, France.,Max-Delbrück-Centrum für Molekulare Medizin in der Helmholtzgemeinschaft (MDC), Berlin, Germany
| | - Clara J Busch
- Max-Delbrück-Centrum für Molekulare Medizin in der Helmholtzgemeinschaft (MDC), Berlin, Germany
| | - Jérémy Favret
- Aix Marseille Université, CNRS, INSERM, CIML, Marseille, France.,Max-Delbrück-Centrum für Molekulare Medizin in der Helmholtzgemeinschaft (MDC), Berlin, Germany
| | - Elisabeth Kowenz-Leutz
- Max-Delbrück-Centrum für Molekulare Medizin in der Helmholtzgemeinschaft (MDC), Berlin, Germany
| | - Wilfried Cathou
- Aix Marseille Université, CNRS, INSERM, CIML, Marseille, France
| | - Rebecca Gentek
- Aix Marseille Université, CNRS, INSERM, CIML, Marseille, France
| | - Pierre Perrin
- Aix Marseille Université, CNRS, INSERM, CIML, Marseille, France
| | - Achim Leutz
- Max-Delbrück-Centrum für Molekulare Medizin in der Helmholtzgemeinschaft (MDC), Berlin, Germany
| | - Carole Berruyer
- Aix Marseille Université, CNRS, INSERM, CIML, Marseille, France
| | - Michael H Sieweke
- Aix Marseille Université, CNRS, INSERM, CIML, Marseille, France .,Max-Delbrück-Centrum für Molekulare Medizin in der Helmholtzgemeinschaft (MDC), Berlin, Germany
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13
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Hyperphosphatemia induces cellular senescence in human aorta smooth muscle cells through integrin linked kinase (ILK) up-regulation. Mech Ageing Dev 2015; 152:43-55. [PMID: 26467393 DOI: 10.1016/j.mad.2015.10.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 09/22/2015] [Accepted: 10/05/2015] [Indexed: 12/13/2022]
Abstract
Aging is conditioned by genetic and environmental factors. Hyperphosphatemia is related to some pathologies, affecting to vascular cells behavior. This work analyze whether high concentration of extracellular phosphate induces vascular smooth muscle cells senescence, exploring the intracellular mechanisms and highlighting the in vivo relevance of this phenomenon. Human aortic smooth muscle cells treated with β-Glycerophosphate (BGP, 10mM) suffered cellular senescence by increasing p53, p21 and p16 expression and the senescence associated β-galactosidase activity. In parallel, BGP induced ILK overexpression, dependent on the IGF-1 receptor activation, and oxidative stress. Down-regulating ILK expression prevented BGP-induced senescence and oxidative stress. Aortic rings from young rats treated with 10mM BGP for 48h, showed increased p53, p16 and ILK expression and SA-β-gal activity. Seven/eight nephrectomized rats feeding a hyperphosphatemic diet and fifteenth- month old mice showed hyperphosphatemia and aortic ILK, p53 and p16 expression. In conclusion, we demonstrated that high extracellular concentration of phosphate induced senescence in cultured smooth muscle through the activation of IGF-1 receptor and ILK overexpression and provided solid evidences for the in vivo relevance of these results since aged animals showed high levels of serum phosphate linked to increased expression of ILK and senescence genes.
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