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Zhang J, Zhang W, Liu J, Liu Y, Jiang Y, Ainiwaer A, Chen H, Gu Z, Chen H, Mao S, Guo Y, Xu T, Xu Y, Wu Y, Yao X, Yan Y. SOX7 inhibits the malignant progression of bladder cancer via the DNMT3B/CYGB axis. MOLECULAR BIOMEDICINE 2024; 5:36. [PMID: 39227479 PMCID: PMC11371982 DOI: 10.1186/s43556-024-00198-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Accepted: 07/22/2024] [Indexed: 09/05/2024] Open
Abstract
Bladder cancer (BCa) stands out as a highly prevalent malignant tumor affecting the urinary system. The Sex determining region Y-box protein family is recognized for its crucial role in BCa progression. However, the effect of Sex determining region Y-box 7 (SOX7) on BCa progression has not been fully elucidated. Herein, RNA-sequencing, western blot (WB), immunohistochemistry (IHC), immunofluorescence (IF) and tissue microarray were utilized to assess SOX7 expression in vitro and in vivo. Additionally, SOX7 expression, prognosis, and SOX7 + cytoglobin (CYGB) score were analyzed using R software. In vitro and vivo experiments were performed with BCa cell lines to validate the effect of SOX7 knockdown and overexpression on the malignant progression of BCa. The results showed that SOX7 exhibits low expression in BCa. It functions in diverse capacities, inhibiting the proliferative, migratory, and invasive capabilities of BCa. In addition, the experimental database demonstrated that SOX7 binds to the promoter of DNA methyltransferase 3 beta (DNMT3B), leading to the transcriptional inhibition of DNMT3B. This subsequently results in a reduced methylation of CYGB promoter, ultimately inhibiting the tumor progression of BCa. SOX7 + CYGB scores were significantly linked to patient prognosis. In conclusion, SOX7 inhibits the malignant progression of BCa via the DNMT3B/CYGB axis. Additionally, the SOX7 + CYGB score is capable of predicting the prognostic outcomes of BCa patients. Therefore, SOX7 and CYGB may play an important role in the progression of bladder cancer, and they can be used as prognostic markers of bladder cancer patients.
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Affiliation(s)
- Jingcheng Zhang
- Department of Urology, School of Medicine, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai, China
| | - Wentao Zhang
- Department of Urology, School of Medicine, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai, China
| | - Ji Liu
- Department of Urology, School of Medicine, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai, China
| | - Yuchao Liu
- Department of Urology, School of Medicine, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai, China
| | - Yufeng Jiang
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai, China
- Department of Urology, Chongming Branch, School of Medicine, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China
| | - Ailiyaer Ainiwaer
- Department of Urology, School of Medicine, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai, China
- Department of Urology, Xinjiang Uygur Autonomous Region, Kashgar Prefecture Second People's Hospital, Kashgar, China
| | - Hanyang Chen
- Department of Urology, School of Medicine, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai, China
| | - Zhuoran Gu
- Department of Urology, School of Medicine, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai, China
| | - Haotian Chen
- Department of Urology, School of Medicine, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai, China
| | - Shiyu Mao
- Department of Urology, School of Medicine, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai, China
| | - Yadong Guo
- Department of Urology, School of Medicine, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai, China
| | - Tianyuan Xu
- Department of Urology, School of Medicine, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai, China
| | - Yunfei Xu
- Department of Urology, School of Medicine, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China.
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai, China.
| | - Yuan Wu
- Department of Urology, Hefei Cancer Hospital, Chinese Academy of Sciences, Hefei, China.
| | - Xudong Yao
- Department of Urology, School of Medicine, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China.
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai, China.
| | - Yang Yan
- Department of Urology, School of Medicine, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China.
- Urologic Cancer Institute, School of Medicine, Tongji University, Shanghai, China.
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De Backer J, Hoogewijs D. The cytoglobin-dependent transcriptome in melanoma indicates a protective function associated with oxidative stress, inflammation and cancer-associated pathways. Sci Rep 2024; 14:18175. [PMID: 39107431 PMCID: PMC11303788 DOI: 10.1038/s41598-024-69224-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2024] [Accepted: 08/01/2024] [Indexed: 08/10/2024] Open
Abstract
Cytoglobin (CYGB) is a member of the oxygen-binding globin superfamily. In this study we generated stable CYGB overexpressing A375 melanoma cells and performed RNA-sequencing to comprehensively explore the CYGB-dependent transcriptome. Our findings reveal that ectopic expression of CYGB dysregulated multiple cancer-associated genes, including the mTORC1 and AKT/mTOR signaling pathways, which are frequently overactivated in tumors. Moreover, several cancer-associated pathways, such as epithelial-mesenchymal transition (EMT) mediated by CSPG4, were downregulated upon CYGB overexpression. Intriguingly, ectopic expression suggested anti-inflammatory potential of CYGB, as exemplified by downregulation of key inflammasome-associated genes, including NLRP1, CASP1 and CD74, which play pivotal roles in cytokine regulation and inflammasome activation. Consistent with established globin functions, CYGB appears to be involved in redox homeostasis. Furthermore, our study indicates CYGB's association to DNA repair mechanisms and its regulation of NOX4, reinforcing its functional versatility. Additionally, multiple significantly enriched pathways in CYGB overexpressing cells were consistently dysregulated in opposite direction in CYGB depleted cells. Collectively, our RNA-sequencing based investigations illustrate the diverse functions of CYGB in melanoma cells, pointing to its putative roles in cellular protection against oxidative stress, inflammation, and cancer-associated pathways. These findings pave the way for further research into the physiological role of CYGB and its potential as a candidate therapeutic target in melanoma.
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Affiliation(s)
- Joey De Backer
- Section of Medicine, Department of Endocrinology, Metabolism and Cardiovascular System, University of Fribourg, Fribourg, Switzerland
- Protein Chemistry, Proteomics and Epigenetic Signaling (PPES) Research Group, Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - David Hoogewijs
- Section of Medicine, Department of Endocrinology, Metabolism and Cardiovascular System, University of Fribourg, Fribourg, Switzerland.
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Chen WA, Williams TG, So L, Drew N, Fang J, Ochoa P, Nguyen N, Jawhar Y, Otiji J, Duerksen-Hughes PJ, Reeves ME, Casiano CA, Jin H, Dovat S, Yang J, Boyle KE, Francis-Boyle OL. Duocarmycin SA Reduces Proliferation and Increases Apoptosis in Acute Myeloid Leukemia Cells In Vitro. Int J Mol Sci 2024; 25:4342. [PMID: 38673926 PMCID: PMC11050052 DOI: 10.3390/ijms25084342] [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: 02/24/2024] [Revised: 04/09/2024] [Accepted: 04/10/2024] [Indexed: 04/28/2024] Open
Abstract
Acute myeloid leukemia (AML) is a hematological malignancy that is characterized by an expansion of immature myeloid precursors. Despite therapeutic advances, the prognosis of AML patients remains poor and there is a need for the evaluation of promising therapeutic candidates to treat the disease. The objective of this study was to evaluate the efficacy of duocarmycin Stable A (DSA) in AML cells in vitro. We hypothesized that DSA would induce DNA damage in the form of DNA double-strand breaks (DSBs) and exert cytotoxic effects on AML cells within the picomolar range. Human AML cell lines Molm-14 and HL-60 were used to perform 3-(4,5-dimethylthiazolyl-2)-2,5-diphenyltetrazolium bromide (MTT), DNA DSBs, cell cycle, 5-ethynyl-2-deoxyuridine (EdU), colony formation unit (CFU), Annexin V, RNA sequencing and other assays described in this study. Our results showed that DSA induced DNA DSBs, induced cell cycle arrest at the G2M phase, reduced proliferation and increased apoptosis in AML cells. Additionally, RNA sequencing results showed that DSA regulates genes that are associated with cellular processes such as DNA repair, G2M checkpoint and apoptosis. These results suggest that DSA is efficacious in AML cells and is therefore a promising potential therapeutic candidate that can be further evaluated for the treatment of AML.
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Affiliation(s)
- William A. Chen
- Department of Pharmaceutical Sciences, School of Pharmacy, Loma Linda University, Shryock Hall 24745 Stewart Street, Loma Linda, CA 92350, USA
| | - Terry G. Williams
- Department of Pharmaceutical Sciences, School of Pharmacy, Loma Linda University, Shryock Hall 24745 Stewart Street, Loma Linda, CA 92350, USA
| | - Leena So
- Department of Pharmaceutical Sciences, School of Pharmacy, Loma Linda University, Shryock Hall 24745 Stewart Street, Loma Linda, CA 92350, USA
| | - Natalie Drew
- Department of Pharmaceutical Sciences, School of Pharmacy, Loma Linda University, Shryock Hall 24745 Stewart Street, Loma Linda, CA 92350, USA
| | - Jie Fang
- Department of Surgery, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Pedro Ochoa
- Department of Basic Sciences, School of Medicine, Loma Linda University, 11175 Campus Street, Loma Linda, CA 92350, USA
- Center for Health Disparities and Molecular Medicine, Loma Linda University, 11085 Campus Street, Loma Linda, CA 92350, USA
| | - Nhi Nguyen
- Department of Pharmaceutical Sciences, School of Pharmacy, Loma Linda University, Shryock Hall 24745 Stewart Street, Loma Linda, CA 92350, USA
| | - Yasmeen Jawhar
- Department of Pharmaceutical Sciences, School of Pharmacy, Loma Linda University, Shryock Hall 24745 Stewart Street, Loma Linda, CA 92350, USA
| | - Jide Otiji
- Department of Pharmaceutical Sciences, School of Pharmacy, Loma Linda University, Shryock Hall 24745 Stewart Street, Loma Linda, CA 92350, USA
| | - Penelope J. Duerksen-Hughes
- Department of Basic Sciences, School of Medicine, Loma Linda University, 11175 Campus Street, Loma Linda, CA 92350, USA
| | - Mark E. Reeves
- Department of Basic Sciences, School of Medicine, Loma Linda University, 11175 Campus Street, Loma Linda, CA 92350, USA
- Department of Surgery, School of Medicine, Loma Linda University, 11234 Anderson Street, Loma Linda, CA 92354, USA
| | - Carlos A. Casiano
- Department of Basic Sciences, School of Medicine, Loma Linda University, 11175 Campus Street, Loma Linda, CA 92350, USA
- Center for Health Disparities and Molecular Medicine, Loma Linda University, 11085 Campus Street, Loma Linda, CA 92350, USA
| | - Hongjian Jin
- Center for Applied Bioinformatics, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Sinisa Dovat
- Departments of Pediatrics, Biochemistry and Molecular Biology, and Pharmacology, Penn State Cancer Institute, 400 University Drive, Hershey, PA 17033, USA
| | - Jun Yang
- Department of Surgery, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Kristopher E. Boyle
- Department of Pharmaceutical Sciences, School of Pharmacy, Loma Linda University, Shryock Hall 24745 Stewart Street, Loma Linda, CA 92350, USA
| | - Olivia L. Francis-Boyle
- Department of Pharmaceutical Sciences, School of Pharmacy, Loma Linda University, Shryock Hall 24745 Stewart Street, Loma Linda, CA 92350, USA
- Department of Basic Sciences, School of Medicine, Loma Linda University, 11175 Campus Street, Loma Linda, CA 92350, USA
- Department of Pathology and Human Anatomy, Division of Anatomy, School of Medicine, Loma Linda University, 11175 Campus Street, Loma Linda, CA 92350, USA
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4
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Schlosser A, Helfenrath K, Wisniewsky M, Hinrichs K, Burmester T, Fabrizius A. The knockout of cytoglobin 1 in zebrafish (Danio rerio) alters lipid metabolism, iron homeostasis and oxidative stress response. BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2023; 1870:119558. [PMID: 37549740 DOI: 10.1016/j.bbamcr.2023.119558] [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: 06/01/2023] [Revised: 07/19/2023] [Accepted: 08/01/2023] [Indexed: 08/09/2023]
Abstract
Cytoglobin (Cygb) is an evolutionary ancient heme protein with yet unclear physiological function(s). Mammalian Cygb is ubiquitously expressed in all tissues and is proposed to be involved in reactive oxygen species (ROS) detoxification, nitric oxide (NO) metabolism and lipid-based signaling processes. Loss-of-function studies in mouse associate Cygb with apoptosis, inflammation, fibrosis, cardiovascular dysfunction or oncogenesis. In zebrafish (Danio rerio), two cygb genes exist, cytoglobin 1 (cygb1) and cytoglobin 2 (cygb2). Both have different coordination states and distinct expression sites within zebrafish tissues. The biological roles of the cygb paralogs are largely uncharacterized. We used a CRISPR/Cas9 genome editing approach and generated a knockout of the penta-coordinated cygb1 for in vivo analysis. Adult male cygb1 knockouts develop phenotypic abnormalities, including weight loss. To identify the molecular mechanisms underlying the occurrence of these phenotypes and differentiate between function and effect of the knockout we compared the transcriptomes of cygb1 knockout at different ages to age-matched wild-type zebrafish. We found that immune regulatory and cell cycle regulatory transcripts (e.g. tp53) were up-regulated in the cygb1 knockout liver. Additionally, the expression of transcripts involved in lipid metabolism and transport, the antioxidative defense and iron homeostasis was affected in the cygb1 knockout. Cygb1 may function as an anti-inflammatory and cytoprotective factor in zebrafish liver, and may be involved in lipid-, iron-, and ROS-dependent signaling.
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Affiliation(s)
- Annette Schlosser
- Institute of Cell and Systems Biology of Animals, University of Hamburg, D-20146 Hamburg, Germany
| | - Kathrin Helfenrath
- Institute of Cell and Systems Biology of Animals, University of Hamburg, D-20146 Hamburg, Germany
| | - Michelle Wisniewsky
- Institute of Cell and Systems Biology of Animals, University of Hamburg, D-20146 Hamburg, Germany
| | - Kira Hinrichs
- Institute of Cell and Systems Biology of Animals, University of Hamburg, D-20146 Hamburg, Germany
| | - Thorsten Burmester
- Institute of Cell and Systems Biology of Animals, University of Hamburg, D-20146 Hamburg, Germany
| | - Andrej Fabrizius
- Institute of Cell and Systems Biology of Animals, University of Hamburg, D-20146 Hamburg, Germany.
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5
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Reeder BJ. Insights into the function of cytoglobin. Biochem Soc Trans 2023; 51:1907-1919. [PMID: 37721133 PMCID: PMC10657185 DOI: 10.1042/bst20230081] [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: 07/31/2023] [Revised: 09/11/2023] [Accepted: 09/12/2023] [Indexed: 09/19/2023]
Abstract
Since its discovery in 2001, the function of cytoglobin has remained elusive. Through extensive in vitro and in vivo research, a range of potential physiological and pathological mechanisms has emerged for this multifunctional member of the hemoglobin family. Currently, over 200 research publications have examined different aspects of cytoglobin structure, redox chemistry and potential roles in cell signalling pathways. This research is wide ranging, but common themes have emerged throughout the research. This review examines the current structural, biochemical and in vivo knowledge of cytoglobin published over the past two decades. Radical scavenging, nitric oxide homeostasis, lipid binding and oxidation and the role of an intramolecular disulfide bond on the redox chemistry are examined, together with aspects and roles for Cygb in cancer progression and liver fibrosis.
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Affiliation(s)
- Brandon J Reeder
- School of Life Sciences, University of Essex, Wivenhoe Park, Colchester, Essex, U.K
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6
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Durrani Z, Kinnaird J, Cheng CW, Brühlmann F, Capewell P, Jackson A, Larcombe S, Olias P, Weir W, Shiels B. A parasite DNA binding protein with potential to influence disease susceptibility acts as an analogue of mammalian HMGA transcription factors. PLoS One 2023; 18:e0286526. [PMID: 37276213 DOI: 10.1371/journal.pone.0286526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 05/15/2023] [Indexed: 06/07/2023] Open
Abstract
Intracellular pathogens construct their environmental niche, and influence disease susceptibility, by deploying factors that manipulate infected host cell gene expression. Theileria annulata is an important tick-borne parasite of cattle that causes tropical theileriosis. Excellent candidates for modulating host cell gene expression are DNA binding proteins bearing AT-hook motifs encoded within the TashAT gene cluster of the parasite genome. In this study, TashAT2 was transfected into bovine BoMac cells to generate three expressing and three non-expressing (opposite orientation) cell lines. RNA-Seq was conducted and differentially expressed (DE) genes identified. The resulting dataset was compared with genes differentially expressed between infected cells and non-infected cells, and DE genes between infected cell lines from susceptible Holstein vs tolerant Sahiwal cattle. Over 800 bovine genes displayed differential expression associated with TashAT2, 209 of which were also modulated by parasite infection. Network analysis showed enrichment of DE genes in pathways associated with cellular adhesion, oncogenesis and developmental regulation by mammalian AT-hook bearing high mobility group A (HMGA) proteins. Overlap of TashAT2 DE genes with Sahiwal vs Holstein DE genes revealed that a significant number of shared genes were associated with disease susceptibility. Altered protein levels encoded by one of these genes (GULP1) was strongly linked to expression of TashAT2 in BoMac cells and was demonstrated to be higher in infected Holstein leucocytes compared to Sahiwal. We conclude that TashAT2 operates as an HMGA analogue to differentially mould the epigenome of the infected cell and influence disease susceptibility.
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Affiliation(s)
- Zeeshan Durrani
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, United Kingdom
| | - Jane Kinnaird
- School of Biodiversity, One Health and Veterinary Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Chew Weng Cheng
- Leeds Institute of Cardiovascular and Metabolic Medicine, School of Medicine, University of Leeds, Leeds, United Kingdom
| | - Francis Brühlmann
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Paul Capewell
- School of Biodiversity, One Health and Veterinary Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Andrew Jackson
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, United Kingdom
| | - Stephen Larcombe
- School of Biological Sciences, Ashworth Laboratories, University of Edinburgh, Edinburgh, United Kingdom
| | - Philipp Olias
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
- Institute of Veterinary Pathology, Justus Liebig University, Giessen, Germany
| | - William Weir
- School of Biodiversity, One Health and Veterinary Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Brian Shiels
- School of Biodiversity, One Health and Veterinary Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
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7
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Yang L, Zhang Y, Zhang Y, Fan Z. Mechanism and application of ferroptosis in colorectal cancer. Biomed Pharmacother 2023; 158:114102. [PMID: 36528917 DOI: 10.1016/j.biopha.2022.114102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 11/10/2022] [Accepted: 12/05/2022] [Indexed: 12/23/2022] Open
Abstract
Colorectal cancer (CRC) is the third most common malignant tumor in the world. CRC has high morbidity and mortality rates and it is a serious threat to human health. Ferroptosis is a unique form of iron-dependent oxidative cell death that is usually accompanied by iron accumulation and lipid peroxidation. Ferroptosis has attracted worldwide attention since it was first proposed. It plays an important role in the development of a variety of diseases, such as tumors, ischemia/reperfusion injury, nervous system diseases, and kidney damage, and it may serve as a new therapeutic target. This article reviews the mechanism of ferroptosis and the possibility to target ferroptosis pathways in CRC, providing new ideas for the diagnosis and treatment of CRC.
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Affiliation(s)
- Liu Yang
- Department of General Surgery, The Third People's Hospital of Dalian, Dalian Medical University, Dalian, China; Department of Central Laboratory, The Third People's Hospital of Dalian, Dalian Medical University, Dalian, China; Liaoning Province Key Laboratory of Corneal and Ocular Surface Diseases Research, The Third People's Hospital of Dalian, Dalian, China
| | - Yewei Zhang
- Department of General Surgery, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.
| | - Yingyi Zhang
- Department of General Surgery, The Third People's Hospital of Dalian, Dalian Medical University, Dalian, China; Department of Central Laboratory, The Third People's Hospital of Dalian, Dalian Medical University, Dalian, China; Liaoning Province Key Laboratory of Corneal and Ocular Surface Diseases Research, The Third People's Hospital of Dalian, Dalian, China.
| | - Zhe Fan
- Department of General Surgery, The Third People's Hospital of Dalian, Dalian Medical University, Dalian, China; Department of Central Laboratory, The Third People's Hospital of Dalian, Dalian Medical University, Dalian, China; Liaoning Province Key Laboratory of Corneal and Ocular Surface Diseases Research, The Third People's Hospital of Dalian, Dalian, China.
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8
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Ye S, Xu M, Zhu T, Chen J, Shi S, Jiang H, Zheng Q, Liao Q, Ding X, Xi Y. Cytoglobin promotes sensitivity to ferroptosis by regulating p53-YAP1 axis in colon cancer cells. J Cell Mol Med 2021; 25:3300-3311. [PMID: 33611811 PMCID: PMC8034452 DOI: 10.1111/jcmm.16400] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 01/22/2021] [Accepted: 02/08/2021] [Indexed: 12/14/2022] Open
Abstract
Ferroptosis is an iron‐dependent mode of non‐apoptotic cell death characterized by accumulation of lipid reactive oxygen species (ROS). As a regulator of ROS, cytoglobin (CYGB) plays an important role in oxygen homeostasis and acts as a tumour suppressor. However, the mechanism by which CYGB regulates cell death is largely unknown. Here, we show that CYGB overexpression increased ROS accumulation and disrupted mitochondrial function as determined by the oxygen consumption rate and membrane potential. Importantly, ferroptotic features with accumulated lipid ROS and malondialdehyde were observed in CYGB‐overexpressing colorectal cancer cells. Moreover, CYGB significantly increased the sensitivity of cancer cells to RSL3‐ and erastin‐induced ferroptotic cell death. Mechanically, both YAP1 and p53 were significantly increased based on the RNA sequencing. The knock‐down of YAP1 alleviated production of lipid ROS and sensitivity to ferroptosis in CYGB overexpressed cells. Furthermore, YAP1 was identified to be inhibited by p53 knock‐down. Finally, high expression level of CYGB had the close correlation with key genes YAP1 and ACSL4 in ferroptosis pathway in colon cancer based on analysis from TCGA data. Collectively, our results demonstrated a novel tumour suppressor role of CYGB through p53‐YAP1 axis in regulating ferroptosis and suggested a potential therapeutic approach for colon cancer.
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Affiliation(s)
- Shazhou Ye
- Institute of Biochemistry and Molecular Biology, School of Medicine, Ningbo University, Ningbo, China
| | - Mingjun Xu
- Institute of Biochemistry and Molecular Biology, School of Medicine, Ningbo University, Ningbo, China
| | - Tingwei Zhu
- Institute of Biochemistry and Molecular Biology, School of Medicine, Ningbo University, Ningbo, China
| | - Jiayi Chen
- Institute of Biochemistry and Molecular Biology, School of Medicine, Ningbo University, Ningbo, China
| | - Shanping Shi
- Institute of Biochemistry and Molecular Biology, School of Medicine, Ningbo University, Ningbo, China
| | - Haizhong Jiang
- Department of Gastroenterology, Ningbo First Hospital, Ningbo, China
| | - Qingfang Zheng
- Institute of Biochemistry and Molecular Biology, School of Medicine, Ningbo University, Ningbo, China
| | - Qi Liao
- Department of Preventative Medicine, School of Medicine, Ningbo University, Ningbo, China
| | - Xiaoyun Ding
- Department of Gastroenterology, Ningbo First Hospital, Ningbo, China
| | - Yang Xi
- Institute of Biochemistry and Molecular Biology, School of Medicine, Ningbo University, Ningbo, China
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9
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Thorne LS, Rochford G, Williams TD, Southam AD, Rodriguez-Blanco G, Dunn WB, Hodges NJ. Cytoglobin protects cancer cells from apoptosis by regulation of mitochondrial cardiolipin. Sci Rep 2021; 11:985. [PMID: 33441751 PMCID: PMC7806642 DOI: 10.1038/s41598-020-79830-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 12/10/2020] [Indexed: 12/15/2022] Open
Abstract
Cytoglobin is important in the progression of oral squamous cell carcinoma but the molecular and cellular basis remain to be elucidated. In the current study, we develop a new cell model to study the function of cytoglobin in oral squamous carcinoma and response to cisplatin. Transcriptomic profiling showed cytoglobin mediated changes in expression of genes related to stress response, redox metabolism, mitochondrial function, cell adhesion, and fatty acid metabolism. Cellular and biochemical studies show that cytoglobin expression results in changes to phenotype associated with cancer progression including: increased cellular proliferation, motility and cell cycle progression. Cytoglobin also protects cells from cisplatin-induced apoptosis and oxidative stress with levels of the antioxidant glutathione increased and total and mitochondrial reactive oxygen species levels reduced. The mechanism of cisplatin resistance involved inhibition of caspase 9 activation and cytoglobin protected mitochondria from oxidative stress-induced fission. To understand the mechanism behind these phenotypic changes we employed lipidomic analysis and demonstrate that levels of the redox sensitive and apoptosis regulating cardiolipin are significantly up-regulated in cells expressing cytoglobin. In conclusion, our data shows that cytoglobin expression results in important phenotypic changes that could be exploited by cancer cells in vivo to facilitate disease progression.
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Affiliation(s)
- Lorna S Thorne
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Garret Rochford
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Timothy D Williams
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Andrew D Southam
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
- Phenome Centre Birmingham, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Giovanny Rodriguez-Blanco
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
- Phenome Centre Birmingham, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Warwick B Dunn
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
- Phenome Centre Birmingham, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
- Institute of Metabolism and Systems Research, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Nikolas J Hodges
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK.
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10
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Ilangovan G, Khaleel SA, Kundu T, Hemann C, El-Mahdy MA, Zweier JL. Defining the reducing system of the NO dioxygenase cytoglobin in vascular smooth muscle cells and its critical role in regulating cellular NO decay. J Biol Chem 2021; 296:100196. [PMID: 33334890 PMCID: PMC7948950 DOI: 10.1074/jbc.ra120.016394] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 12/07/2020] [Accepted: 12/15/2020] [Indexed: 12/27/2022] Open
Abstract
In smooth muscle, cytoglobin (Cygb) functions as a potent nitric oxide (NO) dioxygenase and regulates NO metabolism and vascular tone. Major questions remain regarding which cellular reducing systems regulate Cygb-mediated NO metabolism. To better define the Cygb-mediated NO dioxygenation process in vascular smooth muscle cells (SMCs), and the requisite reducing systems that regulate cellular NO decay, we assessed the intracellular concentrations of Cygb and its putative reducing systems and examined their roles in the process of NO decay. Cygb and the reducing systems, cytochrome b5 (B5)/cytochrome b5 reductase (B5R) and cytochrome P450 reductase (CPR) were measured in aortic SMCs. Intracellular Cygb concentration was estimated as 3.5 μM, while B5R, B5, and CPR were 0.88, 0.38, and 0.15 μM, respectively. NO decay in SMCs was measured following bolus addition of NO to air-equilibrated cells. siRNA-mediated knockdown experiments indicated that ∼78% of NO metabolism in SMCs is Cygb-dependent. Of this, ∼87% was B5R- and B5-dependent. CPR knockdown resulted in a small decrease in the NO dioxygenation rate (VNO), while depletion of ascorbate had no effect. Kinetic analysis of VNO for the B5/B5R/Cygb system with variation of B5 or B5R concentrations from their SMC levels showed that VNO exhibits apparent Michaelis-Menten behavior for B5 and B5R. In contrast, linear variation was seen with change in Cygb concentration. Overall, B5/B5R was demonstrated to be the major reducing system supporting Cygb-mediated NO metabolism in SMCs with changes in cellular B5/B5R levels modulating the process of NO decay.
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Affiliation(s)
- Govindasamy Ilangovan
- Department of Internal Medicine, Division of Cardiovascular Medicine, and the EPR Center, Davis Heart & Lung Research Institute, College of Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Sahar A Khaleel
- Department of Internal Medicine, Division of Cardiovascular Medicine, and the EPR Center, Davis Heart & Lung Research Institute, College of Medicine, The Ohio State University, Columbus, Ohio, USA; Department of Pharmacology and Toxicology, College of Pharmacy, Al-Azhar University, Cairo, Egypt
| | - Tapan Kundu
- Department of Internal Medicine, Division of Cardiovascular Medicine, and the EPR Center, Davis Heart & Lung Research Institute, College of Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Craig Hemann
- Department of Internal Medicine, Division of Cardiovascular Medicine, and the EPR Center, Davis Heart & Lung Research Institute, College of Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Mohamed A El-Mahdy
- Department of Internal Medicine, Division of Cardiovascular Medicine, and the EPR Center, Davis Heart & Lung Research Institute, College of Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Jay L Zweier
- Department of Internal Medicine, Division of Cardiovascular Medicine, and the EPR Center, Davis Heart & Lung Research Institute, College of Medicine, The Ohio State University, Columbus, Ohio, USA.
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11
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Lessons from the post-genomic era: Globin diversity beyond oxygen binding and transport. Redox Biol 2020; 37:101687. [PMID: 32863222 PMCID: PMC7475203 DOI: 10.1016/j.redox.2020.101687] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 08/11/2020] [Accepted: 08/11/2020] [Indexed: 12/16/2022] Open
Abstract
Vertebrate hemoglobin (Hb) and myoglobin (Mb) were among the first proteins whose structures and sequences were determined over 50 years ago. In the subsequent pregenomic period, numerous related proteins came to light in plants, invertebrates and bacteria, that shared the myoglobin fold, a signature sequence motif characteristic of a 3-on-3 α-helical sandwich. Concomitantly, eukaryote and bacterial globins with a truncated 2-on-2 α-helical fold were discovered. Genomic information over the last 20 years has dramatically expanded the list of known globins, demonstrating their existence in a limited number of archaeal genomes, a majority of bacterial genomes and an overwhelming majority of eukaryote genomes. In vertebrates, 6 additional globin types were identified, namely neuroglobin (Ngb), cytoglobin (Cygb), globin E (GbE), globin X (GbX), globin Y (GbY) and androglobin (Adgb). Furthermore, functions beyond the familiar oxygen transport and storage have been discovered within the vertebrate globin family, including NO metabolism, peroxidase activity, scavenging of free radicals, and signaling functions. The extension of the knowledge on globin functions suggests that the original roles of bacterial globins must have been enzymatic, involved in defense against NO toxicity, and perhaps also as sensors of O2, regulating taxis away or towards high O2 concentrations. In this review, we aimed to discuss the evolution and remarkable functional diversity of vertebrate globins with particular focus on the variety of non-canonical expression sites of mammalian globins and their according impressive variability of atypical functions.
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12
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Giordano D, Pesce A, Vermeylen S, Abbruzzetti S, Nardini M, Marchesani F, Berghmans H, Seira C, Bruno S, Javier Luque F, di Prisco G, Ascenzi P, Dewilde S, Bolognesi M, Viappiani C, Verde C. Structural and functional properties of Antarctic fish cytoglobins-1: Cold-reactivity in multi-ligand reactions. Comput Struct Biotechnol J 2020; 18:2132-2144. [PMID: 32913582 PMCID: PMC7451756 DOI: 10.1016/j.csbj.2020.08.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 07/10/2020] [Accepted: 08/05/2020] [Indexed: 12/11/2022] Open
Abstract
While the functions of the recently discovered cytoglobin, ubiquitously expressed in vertebrate tissues, remain uncertain, Antarctic fish provide unparalleled models to study novel protein traits that may arise from cold adaptation. We report here the spectral, ligand-binding and enzymatic properties (peroxynitrite isomerization, nitrite-reductase activity) of cytoglobin-1 from two Antarctic fish, Chaenocephalus aceratus and Dissostichus mawsoni, and present the crystal structure of D. mawsoni cytoglobin-1. The Antarctic cytoglobins-1 display high O2 affinity, scarcely compatible with an O2-supply role, a slow rate constant for nitrite-reductase activity, and do not catalyze peroxynitrite isomerization. Compared with mesophilic orthologues, the cold-adapted cytoglobins favor binding of exogenous ligands to the hexa-coordinated bis-histidyl species, a trait related to their higher rate constant for distal-His/heme-Fe dissociation relative to human cytoglobin. At the light of a remarkable 3D-structure conservation, the observed differences in ligand-binding kinetics may reflect Antarctic fish cytoglobin-1 specific features in the dynamics of the heme distal region and of protein matrix cavities, suggesting adaptation to functional requirements posed by the cold environment. Taken together, the biochemical and biophysical data presented suggest that in Antarctic fish, as in humans, cytoglobin-1 unlikely plays a role in O2 transport, rather it may be involved in processes such as NO detoxification.
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Key Words
- C.aceCygb-1*, Mutant of C.aceCygb-1
- C.aceCygb-1, Cytoglobin-1 of C. aceratus
- CO, Carbon monoxide
- CYGB, Human Cygb
- Cold-adaptation
- Cygb, Cytoglobin
- Cygb-1, Cytoglobin 1
- Cygb-2, Cytoglobin 2
- Cygbh, Hexa-coordinated bis-histidyl species
- Cygbp, Penta-coordinated Cygb
- Cytoglobin
- D.mawCygb-1*, Mutant of D.mawCygb-1
- D.mawCygb-1, Cytoglobin-1 of D. mawsoni
- DTT, Dithiothreitol
- Hb, Hemoglobin
- Ligand properties
- MD, Molecular Dynamics
- Mb, Myoglobin
- NGB, Human neuroglobin
- NO dioxygenase
- NO, Nitric oxide
- RNS, Reactive Nitrogen Species
- ROS, Reactive Oxygen Species
- X-ray structure
- p50, O2 partial pressure required to achieve half saturation
- rms, Root-mean square
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Affiliation(s)
- Daniela Giordano
- Institute of Biosciences and BioResources (IBBR), CNR, Via Pietro Castellino 111 80131 Napoli, Italy.,Department of Biology and Evolution of Marine Organisms, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy
| | - Alessandra Pesce
- Department of Physics, University of Genova, Via Dodecaneso 33, I-16121 Genova, Italy
| | - Stijn Vermeylen
- Department of Biomedical Sciences, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Belgium
| | - Stefania Abbruzzetti
- Department of Mathematical, Physical and Computer Sciences, University of Parma, Parco Area delle Scienze 7A, 43124 Parma, Italy
| | - Marco Nardini
- Department of Biosciences, University of Milano, Via Celoria 26, I-20133 Milano, Italy
| | - Francesco Marchesani
- Department of Food and Drug, University of Parma, Parco Area delle Scienze 23A, 43124, Parma, Italy
| | - Herald Berghmans
- Department of Biomedical Sciences, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Belgium
| | - Constantí Seira
- Department of Nutrition, Food Science and Gastronomy, Faculty of Pharmacy and Food Science, Institute of Biomedicine (IBUB) and Institute of Theoretical and Computational Chemistry (IQTCUB), University of Barcelona, Av. Prat de la Riba 171, Santa Coloma de Gramenet E-08921, Spain
| | - Stefano Bruno
- Department of Food and Drug, University of Parma, Parco Area delle Scienze 23A, 43124, Parma, Italy
| | - F Javier Luque
- Department of Nutrition, Food Science and Gastronomy, Faculty of Pharmacy and Food Science, Institute of Biomedicine (IBUB) and Institute of Theoretical and Computational Chemistry (IQTCUB), University of Barcelona, Av. Prat de la Riba 171, Santa Coloma de Gramenet E-08921, Spain
| | - Guido di Prisco
- Institute of Biosciences and BioResources (IBBR), CNR, Via Pietro Castellino 111 80131 Napoli, Italy
| | - Paolo Ascenzi
- Interdepartmental Laboratory for Electron Microscopy, Roma Tre University, Via della Vasca Navale 79, I-00146 Roma, Italy
| | - Sylvia Dewilde
- Department of Biomedical Sciences, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Belgium
| | - Martino Bolognesi
- Department of Biosciences, University of Milano, Via Celoria 26, I-20133 Milano, Italy
| | - Cristiano Viappiani
- Department of Mathematical, Physical and Computer Sciences, University of Parma, Parco Area delle Scienze 7A, 43124 Parma, Italy
| | - Cinzia Verde
- Institute of Biosciences and BioResources (IBBR), CNR, Via Pietro Castellino 111 80131 Napoli, Italy.,Department of Biology and Evolution of Marine Organisms, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy
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13
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Abstract
Significance: Cytoglobin (Cygb) was discovered as a new addition to the globin superfamily and subsequently identified to have potent nitric oxide (NO) dioxygenase function. Cygb plays a critical role in the oxygen-dependent regulation of NO levels and vascular tone. Recent Advances: In recent years, the mechanism of the Cygb-mediated NO dioxygenation has been studied in isolated protein, smooth muscle cell, isolated blood vessel, and in vivo animal model systems. Studies in Cygb-/- mice have demonstrated that Cygb plays a critical role in regulating blood pressure and vascular tone. This review summarizes advances in the knowledge of NO dioxygenation/metabolism regulated by Cygb. Advances in measurement of NO diffusion dynamics across blood vessels and kinetic modeling of Cygb-mediated NO dioxygenation are summarized. The oxygen-dependent regulation of NO degradation by Cygb is also reviewed along with how Cygb paradoxically generates NO from nitrite under anaerobic conditions. The important role of Cygb in the regulation of vascular function and disease is reviewed. Critical Issues: Cygb is a more potent NO dioxygenase (NOD) than previously known globins with structural differences in heme coordination and environment, conferring it with a higher rate of reduction and more rapid process of NO dioxygenation with unique oxygen dependence. Various cellular reducing systems regenerate the catalytic oxyferrous Cygb species, supporting a high rate of NO dioxygenation. Future Directions: There remains a critical need to further characterize the factors and processes that modulate Cygb-mediated NOD function, and to develop pharmacological or other approaches to modulate Cygb function and expression.
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Affiliation(s)
- Jay L Zweier
- Division of Cardiovascular Medicine, Department of Internal Medicine, Davis Heart and Lung Research Institute, The Ohio State University College of Medicine, Columbus, Ohio, USA
| | - Govindasamy Ilangovan
- Division of Cardiovascular Medicine, Department of Internal Medicine, Davis Heart and Lung Research Institute, The Ohio State University College of Medicine, Columbus, Ohio, USA
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14
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Mathai C, Jourd'heuil FL, Lopez-Soler RI, Jourd'heuil D. Emerging perspectives on cytoglobin, beyond NO dioxygenase and peroxidase. Redox Biol 2020; 32:101468. [PMID: 32087552 PMCID: PMC7033357 DOI: 10.1016/j.redox.2020.101468] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 02/05/2020] [Accepted: 02/13/2020] [Indexed: 12/18/2022] Open
Abstract
Cytoglobin is an evolutionary ancient hemoglobin with poor functional annotation. Rather than constrained to penta coordination, cytoglobin's heme iron may exist either as a penta or hexacoordinated arrangement when exposed to different intracellular environments. Two cysteine residues at the surface of the protein form an intramolecular disulfide bond that regulates iron coordination, ligand binding, and peroxidase activity. Overall, biochemical results do not support a role for cytoglobin as a direct antioxidant enzyme that scavenges hydrogen peroxide because the rate of the reaction of cytoglobin with hydrogen peroxide is several orders of magnitude slower than metal and thiol-based peroxidases. Thus, alternative substrates such as fatty acids have been suggested and regulation of nitric oxide bioavailability through nitric oxide dioxygenase and nitrite reductase activities has received experimental support. Cytoglobin is broadly expressed in connective, muscle, and nervous tissues. Rational for differential cellular distribution is poorly understood but inducibility in response to hypoxia is one of the most established features of cytoglobin expression with regulation through the transcription factor hypoxia-inducible factor (HIF). Phenotypic characterization of cytoglobin deletion in the mouse have indicated broad changes that include a heightened inflammatory response and fibrosis, increase tumor burden, cardiovascular dysfunction, and hallmarks of senescence. Some of these changes might be reversed upon inhibition of nitric oxide synthase. However, subcellular and molecular interactions have been seldom characterized. In addition, specific molecular mechanisms of action are still lacking. We speculate that cytoglobin functionality will extend beyond nitric oxide handling and will have to encompass indirect regulatory antioxidant and redox sensing functions.
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Affiliation(s)
- Clinton Mathai
- Department of Molecular and Cellular Physiology, Albany Medical College, Albany, NY, USA
| | - Frances L Jourd'heuil
- Department of Molecular and Cellular Physiology, Albany Medical College, Albany, NY, USA
| | | | - David Jourd'heuil
- Department of Molecular and Cellular Physiology, Albany Medical College, Albany, NY, USA.
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15
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Feng Y, Wu M, Li S, He X, Tang J, Peng W, Zeng B, Deng C, Ren G, Xiang T. The epigenetically downregulated factor CYGB suppresses breast cancer through inhibition of glucose metabolism. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2018; 37:313. [PMID: 30545372 PMCID: PMC6293581 DOI: 10.1186/s13046-018-0979-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 11/26/2018] [Indexed: 01/10/2023]
Abstract
Background Recent studies suggested the globin family member cytoglobin (CYGB) as a potential tumor suppressor; however, the mechanism by which CYGB suppresses cancer is elusive. We investigated the role and mechanism of CYGB in suppressing breast cancer. Methods CYGB expression was examined by reverse transcription PCR, quantitative reverse transcription PCR and open database analysis. Promoter methylation was examined by methylation-specific PCR. Metabolomics and proteomics were analyzed by gas chromatography-mass spectrometry and isobaric tags for relative and absolute quantitation, respectively. The effects and mechanisms of ectopic CYGB expression in breast cancer cells were assessed with molecular biological and cellular approaches in vitro and with a xenograft tumor model in nude mice. Results CYGB expression was downregulated in breast cancer tissues and cell lines, which was associated with promoter methylation. Ectopic CYGB expression suppressed proliferation, migration, invasion and induced apoptosis in breast cancer cell lines MCF7 (p53WT) and MB231 (p53mt) in vitro, and inhibited xenograft tumor growth in vivo. By proteomics and metabolomics analysis, glucose metabolism was found to be one of the main pathways suppressed by CYGB. The CYGB-expressing cells had lower ATP and compromised glycolysis. Additionally, CYGB suppressed key glucose metabolism factors including GLUT1 and HXK2 in p53-dependent and -independent manners. Restoration of GLUT1 or HXK2 expression attenuated CYGB-mediated proliferation suppression and apoptosis induction. Conclusions CYGB is a potential tumor suppressor in breast cancer that is epigenetically suppressed. The results for the first time suggest that CYGB suppresses breast cancer through inhibiting glucose metabolism, which could be exploited for breast cancer prevention and therapy. Electronic supplementary material The online version of this article (10.1186/s13046-018-0979-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yixiao Feng
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Mingjun Wu
- Institute of Life Science, Chongqing Medical University, Chongqing, China
| | - Shuman Li
- Department of Oncology, the Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xiaoqian He
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jun Tang
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Weiyan Peng
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Beilei Zeng
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Chuxia Deng
- Faculty of Health Sciences, University of Macau, Macau SAR, China
| | - Guosheng Ren
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Tingxiu Xiang
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
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16
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Zhang J, Pei Y, Yang W, Yang W, Chen B, Zhao X, Long S. Cytoglobin ameliorates the stemness of hepatocellular carcinoma via coupling oxidative-nitrosative stress signals. Mol Carcinog 2018; 58:334-343. [PMID: 30365183 DOI: 10.1002/mc.22931] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 09/22/2018] [Accepted: 10/23/2018] [Indexed: 12/18/2022]
Abstract
Cancer stem cells (CSCs) account for tumor self-renewal and heterogeneity. Oxidative-nitrosative stress (ONS) is an independent etiologic factor throughout tumorigenesis. Emerging evidences indicated that the interaction of ONS with CSCs contributes to tumor progression and resistance to chemoradiotherapy. Cytoglobin (Cygb) is a member of human hexacoordinate hemoglobin family and acts as a dynamic mediator of redox homeostasis. We observed that Cygb is significantly deregulated in human hepatocellular carcinoma (HCC) tissue and its decrease aggravates the growth of liver cancer stem cells (LCSCs) and increases the subpopulation of CD133(+) LCSCs. Cygb restoration inhibits HCC proliferation and LCSC growth, and decreases the subpopulation of CD133 (+) LCSCs in vitro. We found that Cygb absence promotes LCSC phenotypes and PI3 K/AKT activation, whereas Cygb restoration inhibits LCSC phenotypes and PI3 K/AKT activation. Furthermore, exogenous antioxidants can eliminate the inhibitory effect of Cygb to LCSC growth and phenotypes, as well as PI3 K/AKT activation. Collectively, this study demonstrated that cytoglobin functions as a tumor suppressor and targets CSCs at an ONS-dependent manner. Thus, Cygb restoration could be a novel and promising therapeutic strategy against HCC with aberrant ROS/RNS accumulation.
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Affiliation(s)
- Jun Zhang
- Department of Pathology, the Affiliated Hospital of Guizhou Medical University, Guiyang, PR China.,Department of Pathology, Graduate School of Medicine, Guizhou Medical University, Guiyang, PR China.,Key Laboratory of Adult Stem Cell Transformation Research, Chinese Academy of Medical Sciences/Stem Cell and Tissue Engineering Research Center, Guizhou Medical University, Guiyang, PR China
| | - YuanYuan Pei
- Department of Pathology, the Affiliated Hospital of Guizhou Medical University, Guiyang, PR China
| | - Wen Yang
- Department of Pathology, the Affiliated Hospital of Guizhou Medical University, Guiyang, PR China
| | - WenXiu Yang
- Department of Pathology, the Affiliated Hospital of Guizhou Medical University, Guiyang, PR China.,Department of Pathology, Graduate School of Medicine, Guizhou Medical University, Guiyang, PR China
| | - BoXin Chen
- Department of Immunology, Basic School of Medicine, Guizhou Medical University, Guiyang, PR China
| | - Xing Zhao
- Department of Immunology, Basic School of Medicine, Guizhou Medical University, Guiyang, PR China
| | - Shiqi Long
- Department of Immunology, Basic School of Medicine, Guizhou Medical University, Guiyang, PR China
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17
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Lilly B, Dammeyer K, Marosis S, McCallinhart PE, Trask AJ, Lowe M, Sawant D. Endothelial cell-induced cytoglobin expression in vascular smooth muscle cells contributes to modulation of nitric oxide. Vascul Pharmacol 2018; 110:7-15. [PMID: 29969687 PMCID: PMC6135703 DOI: 10.1016/j.vph.2018.06.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 06/14/2018] [Accepted: 06/23/2018] [Indexed: 12/20/2022]
Abstract
Cytoglobin is a widely expressed heme protein that binds oxygen, carbon monoxide and nitric oxide. Recent examination of cytoglobin in the vasculature indicates that it contributes to nitric oxide availability, which is central to normal blood vessel function through regulation of smooth muscle cell tone and physiological response. Given the potential implications of cytoglobin in vascular function, we examined how cytoglobin might be uniquely regulated in vascular smooth muscle cells. Our data demonstrate that endothelial cells can increase the expression of cytoglobin in vascular smooth muscle cells, and the induction of cytoglobin is cell contact-dependent. We show that Notch signaling is necessary for endothelial cell-induced cytoglobin expression and Notch2 and Notch3 are sufficient to drive its expression in aortic smooth muscle cells. We further reveal that in cytoglobin-depleted smooth muscle cells there is increased cellular nitric oxide. These data demonstrate that, in addition to being the main producer of vascular nitric oxide, endothelial cells facilitate the ability of smooth muscle cells to metabolize nitric oxide through upregulation of cytoglobin. Our results reveal a novel mechanism by which Notch signaling contributes to vascular function through regulation of a gene that controls nitric oxide levels.
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Affiliation(s)
- Brenda Lilly
- Center for Cardiovascular Research, The Ohio State University, Columbus, OH, USA; The Heart Center, Nationwide Children's Hospital, The Ohio State University, Columbus, OH, USA; Department of Pediatrics, The Ohio State University, Columbus, OH, USA; The Ohio State University, Columbus, OH, USA.
| | - Kristen Dammeyer
- Center for Cardiovascular Research, The Ohio State University, Columbus, OH, USA; The Ohio State University, Columbus, OH, USA
| | - Sam Marosis
- Center for Cardiovascular Research, The Ohio State University, Columbus, OH, USA; The Ohio State University, Columbus, OH, USA
| | - Patricia E McCallinhart
- Center for Cardiovascular Research, The Ohio State University, Columbus, OH, USA; The Heart Center, Nationwide Children's Hospital, The Ohio State University, Columbus, OH, USA
| | - Aaron J Trask
- Center for Cardiovascular Research, The Ohio State University, Columbus, OH, USA; The Heart Center, Nationwide Children's Hospital, The Ohio State University, Columbus, OH, USA; Department of Pediatrics, The Ohio State University, Columbus, OH, USA; The Ohio State University, Columbus, OH, USA
| | - Megan Lowe
- Center for Cardiovascular Research, The Ohio State University, Columbus, OH, USA; The Heart Center, Nationwide Children's Hospital, The Ohio State University, Columbus, OH, USA
| | - Dwitiya Sawant
- Center for Cardiovascular Research, The Ohio State University, Columbus, OH, USA; The Heart Center, Nationwide Children's Hospital, The Ohio State University, Columbus, OH, USA
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18
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Pongsuchart M, Kuchimaru T, Yonezawa S, Tran DTP, Kha NT, Hoang NTH, Kadonosono T, Kizaka‐Kondoh S. Novel lymphoid enhancer-binding factor 1-cytoglobin axis promotes extravasation of osteosarcoma cells into the lungs. Cancer Sci 2018; 109:2746-2756. [PMID: 29927026 PMCID: PMC6125443 DOI: 10.1111/cas.13702] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 06/16/2018] [Indexed: 12/14/2022] Open
Abstract
Lung metastasis is a major cause of mortality in patients with osteosarcoma (OS). A better understanding of the molecular mechanism of OS lung metastasis may facilitate development of new therapeutic strategies to prevent the metastasis. We have established high- and low-metastatic sublines (LM8-H and LM8-L, respectively) from Dunn OS cell line LM8 by using in vivo image-guided screening. Among the genes whose expression was significantly increased in LM8-H compared to LM8-L, the transcription factor lymphoid enhancer-binding factor 1 (LEF1) was identified as a factor that promotes LM8-H cell extravasation into the lungs. To identify downstream effectors of LEF1 that are involved in OS lung metastasis, 13 genes were selected based on LM8 microarray data and genomewide meta-analysis of a public database for OS patients. Among them, the cytoglobin (Cygb) gene was identified as a key effector in promoting OS extravasation into the lungs. CYGB overexpression increased the extravasation ability of LM8-L cells, whereas knocking out the Cygb gene in LM8-H cells reduced this ability. Our results showed a novel LEF1-CYGB axis in OS lung metastasis and may provide a new way of developing therapeutic strategies to prevent OS lung metastasis.
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Affiliation(s)
- Mongkol Pongsuchart
- School of Life Science and TechnologyTokyo Institute of TechnologyYokohamaJapan
| | - Takahiro Kuchimaru
- School of Life Science and TechnologyTokyo Institute of TechnologyYokohamaJapan
- Present address:
Center for Molecular MedicineJichi Medical University 3311‐1YakushijiShimotsukeTochigiJapan
| | - Sakiko Yonezawa
- School of Life Science and TechnologyTokyo Institute of TechnologyYokohamaJapan
| | | | - Nguyen The Kha
- School of Life Science and TechnologyTokyo Institute of TechnologyYokohamaJapan
| | - Ngoc Thi Hong Hoang
- School of Life Science and TechnologyTokyo Institute of TechnologyYokohamaJapan
| | - Tetsuya Kadonosono
- School of Life Science and TechnologyTokyo Institute of TechnologyYokohamaJapan
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19
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Strong modulation of nitrite reductase activity of cytoglobin by disulfide bond oxidation: Implications for nitric oxide homeostasis. Nitric Oxide 2018; 72:16-23. [DOI: 10.1016/j.niox.2017.11.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 10/18/2017] [Accepted: 11/07/2017] [Indexed: 11/22/2022]
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20
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Ou L, Li X, Chen B, Ge Z, Zhang J, Zhang Y, Cai G, Li Z, Wang P, Dong W. Recombinant Human Cytoglobin Prevents Atherosclerosis by Regulating Lipid Metabolism and Oxidative Stress. J Cardiovasc Pharmacol Ther 2017; 23:162-173. [PMID: 28954528 DOI: 10.1177/1074248417724870] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Lingling Ou
- The First Affiliated Hospital of Jinan University, Guangzhou, China
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
| | - Xin Li
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
- Department of Medical Research, General Hospital of Guangzhou Military Command of PLA, Guangzhou, China
| | - Baihong Chen
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
| | - Zhenhuang Ge
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
| | - Junyi Zhang
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
| | - Ye Zhang
- The First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Gaotai Cai
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
| | - Zhen Li
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
| | - Ping Wang
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
| | - Wenqi Dong
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
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21
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Reeder BJ. Redox and Peroxidase Activities of the Hemoglobin Superfamily: Relevance to Health and Disease. Antioxid Redox Signal 2017; 26:763-776. [PMID: 27637274 DOI: 10.1089/ars.2016.6803] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
SIGNIFICANCE Erythrocyte hemoglobin (Hb) and myocyte myoglobin, although primarily oxygen-carrying proteins, have the capacity to do redox chemistry. Such redox activity in the wider family of globins now appears to have important associations with the mechanisms of cell stress response. In turn, an understanding of such mechanisms in vivo may have a potential in the understanding of cancer therapy resistance and neurodegenerative disorders such as Alzheimer's. Recent Advances: There has been an enhanced understanding of the redox chemistry of the globin superfamily in recent years, leading to advances in development of Hb-based blood substitutes and in hypotheses relating to specific disease mechanisms. Neuroglobin (Ngb) and cytoglobin (Cygb) have been linked to cell protection mechanisms against hypoxia and oxidative stress, with implications in the onset and progression of neurodegenerative diseases for Ngb and cancer for Cygb. CRITICAL ISSUES Despite advances in the understanding of redox chemistry of globins, the physiological roles of many of these proteins still remain ambiguous at best. Confusion over potential physiological roles may relate to multifunctional roles for globins, which may be modulated by surface-exposed cysteine pairs in some globins. Such roles may be critical in deciphering the relationships of these globins in human diseases. FUTURE DIRECTIONS Further studies are required to connect the considerable knowledge on the mechanisms of globin redox chemistry in vitro with the physiological and pathological roles of globins in vivo. In doing so, new therapies for neurodegenerative disorders and cancer therapy resistance may be targeted. Antioxid. Redox Signal. 26, 763-776.
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Affiliation(s)
- Brandon J Reeder
- School of Biological Sciences, University of Essex , Essex, United Kingdom
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22
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COL1A1, PRPF40A, and UCP2 correlate with hypoxia markers in non-small cell lung cancer. J Cancer Res Clin Oncol 2017; 143:1133-1141. [PMID: 28258342 PMCID: PMC5486546 DOI: 10.1007/s00432-017-2381-y] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 02/20/2017] [Indexed: 12/21/2022]
Abstract
Purpose Collagen 1A1 (COL1A1), RNA-binding and pre-mRNA Processing Factor (PRPF40A), and Uncoupling Protein 2 (UCP2) were identified as downstream effectors of cytoglobin (CYGB), which was shown implicated in tumour biology. Although these three genes have been previously associated with cancer, little is known about their status in lung malignancies. Methods Hereby, we investigated the expression and promoter methylation of COL1A1, PRPF40A, and UCP2 in 156 non-small cell lung cancer (NSCLC) and adjacent normal tissues. Results We demonstrate that COL1A1 and PRPF40A mRNAs are significantly overexpressed in NSCLC (p < 1 × 10−4), while UCP2 exhibits a trend of upregulation (p = 0.066). Only COL1A1 promoter revealed hypermethylation in NSCLCs (36%), which was particularly evident in squamous cell carcinomas (p = 0.024) and in the tumours with moderate-to-good differentiation (p = 0.01). Transcript level of COL1A1, as well as PRPF40A and UCP2, exhibited striking association (p ≤ 0.001) with the expression of hypoxia markers. In addition, we demonstrate in lung cancer cell lines exposed to hypoxia or oxidative stress that COL1A1 transcription significantly responds to oxygen depletion, while other genes showed the modest upregulation in stress conditions. Conclusion In conclusion, our data revealed that COL1A1, UCP2, and PRPF40A are novel players implicated in the complex network of hypoxia response in NSCLC.
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23
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Doğan A, Demirci S, Kıratlı B, Şahin F. Cytoglobin: a potential marker for adipogenic differentiation in preadipocytes in vitro. Cytotechnology 2017; 69:157-165. [PMID: 27928650 PMCID: PMC5264631 DOI: 10.1007/s10616-016-0047-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Accepted: 11/22/2016] [Indexed: 01/12/2023] Open
Abstract
Obesity, mainly characterized by the excess fat storage, is a global health problem resulting in serious morbidity and mortality. Identification of molecular mechanisms in adipogenic differentiation pathway might lead to development of new strategies for diagnosis, prevention and therapy of obesity and associated diseases. Discovery of new genes and proteins in the differentiation pathway could help to understand the key specific regulators of the adipogenesis. Cytoglobin (Cygb), identified as a new globin family member protein, is expressed in various tissues. Although its interaction with oxygen and nitric oxide indicates the potential role in antioxidant pathways, the exact role remains unclear. In the current study, expression level of Cygb was determined in proliferating and differentiating 3T3-F442A cells by gene expression and protein expression analysis. Results revealed that Cygb expression up-regulated in differentiated cells in parallel with adipogenic differentiation markers; PPARγ, CEBPα and FABP4 expressions. Besides, Cygb overexpression in preadipocytes contributed to the adipogenic differentiation as verified by detection of higher lipid droplets and increased PPARγ, CEBPα and FABP4 expressions with respect to control cells. These findings will shed light on the unknown roles of Cygb in adipogenesis and obesity.
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Affiliation(s)
- Ayşegül Doğan
- Department of Genetics and Bioengineering, Faculty of Engineering and Architecture, Yeditepe University, Kayisdagi Cad. 26 Agustos Yerlesimi, Atasehir, 34755, Istanbul, Turkey
- CDBL, National Cancer Instıtute, NIH, Frederick, MD, USA
| | - Selami Demirci
- Department of Genetics and Bioengineering, Faculty of Engineering and Architecture, Yeditepe University, Kayisdagi Cad. 26 Agustos Yerlesimi, Atasehir, 34755, Istanbul, Turkey.
- National Heart, Lung, and Blood Institute (NHLBI), NIH, Bethesda, MD, USA.
| | - Binnur Kıratlı
- Department of Genetics and Bioengineering, Faculty of Engineering and Architecture, Yeditepe University, Kayisdagi Cad. 26 Agustos Yerlesimi, Atasehir, 34755, Istanbul, Turkey
| | - Fikrettin Şahin
- Department of Genetics and Bioengineering, Faculty of Engineering and Architecture, Yeditepe University, Kayisdagi Cad. 26 Agustos Yerlesimi, Atasehir, 34755, Istanbul, Turkey
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24
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Abstract
Globins are globular proteins for either transport or storage of oxygen which are critical for cellular metabolism. Four globins have been identified in rodent and human brains. Among them, neuroglobin, cytoglobin and hemoglobin chains are constitutively expressed in normal brain, while myoglobin is only expressed in some neurological disorders. Studies on the molecular structure, expression and functional features of these brain globins indicated that they may play crucial roles in maintenance of neural cell survival and activity, including neurons and astrocytes. Their regulation in neurological disorders may help thoroughly understand initiation and progression of ischemia, Alzheimer's disease and glioma, etc. Elucidation of the brain globin functions might remarkably improve medical strategies that sustain neurological homeostasis and treat neurological diseases. Here the expression pattern and functions of brain globins and their involvement in neurological disorders are reviewed.
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Affiliation(s)
- Luo-Kun Xie
- Center for Neuroscience Discovery, University of North Texas Health Science Center, Fort Worth, TX, USA
| | - Shao-Hua Yang
- Center for Neuroscience Discovery, University of North Texas Health Science Center, Fort Worth, TX, USA
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25
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Tejero J, Kapralov AA, Baumgartner MP, Sparacino-Watkins CE, Anthonymutu TS, Vlasova II, Camacho CJ, Gladwin MT, Bayir H, Kagan VE. Peroxidase activation of cytoglobin by anionic phospholipids: Mechanisms and consequences. BIOCHIMICA ET BIOPHYSICA ACTA 2016; 1861:391-401. [PMID: 26928591 PMCID: PMC4821708 DOI: 10.1016/j.bbalip.2016.02.022] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 02/02/2016] [Accepted: 02/24/2016] [Indexed: 10/22/2022]
Abstract
Cytoglobin (Cygb) is a hexa-coordinated hemoprotein with yet to be defined physiological functions. The iron coordination and spin state of the Cygb heme group are sensitive to oxidation of two cysteine residues (Cys38/Cys83) and/or the binding of free fatty acids. However, the roles of redox vs lipid regulators of Cygb's structural rearrangements in the context of the protein peroxidase competence are not known. Searching for physiologically relevant lipid regulators of Cygb, here we report that anionic phospholipids, particularly phosphatidylinositolphosphates, affect structural organization of the protein and modulate its iron state and peroxidase activity both conjointly and/or independently of cysteine oxidation. Thus, different anionic lipids can operate in cysteine-dependent and cysteine-independent ways as inducers of the peroxidase activity. We establish that Cygb's peroxidase activity can be utilized for the catalysis of peroxidation of anionic phospholipids (including phosphatidylinositolphosphates) yielding mono-oxygenated molecular species. Combined with the computational simulations we propose a bipartite lipid binding model that rationalizes the modes of interactions with phospholipids, the effects on structural re-arrangements and the peroxidase activity of the hemoprotein.
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Affiliation(s)
- Jesús Tejero
- Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA 15213, USA; Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA.
| | - Alexandr A Kapralov
- Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, PA 15219, USA; Center for Free Radical and Antioxidant Health and Center for Medical Countermeasures against Radiation, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Matthew P Baumgartner
- Department of Computational and Systems Biology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Courtney E Sparacino-Watkins
- Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA 15213, USA; Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Tamil S Anthonymutu
- Center for Free Radical and Antioxidant Health and Center for Medical Countermeasures against Radiation, University of Pittsburgh, Pittsburgh, PA 15219, USA; Department of Critical Care Medicine, Safar Center for Resuscitation Research, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Irina I Vlasova
- Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, PA 15219, USA; Center for Free Radical and Antioxidant Health and Center for Medical Countermeasures against Radiation, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Carlos J Camacho
- Department of Computational and Systems Biology, University of Pittsburgh, Pittsburgh, PA, USA.
| | - Mark T Gladwin
- Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA 15213, USA; Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Hülya Bayir
- Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, PA 15219, USA; Center for Free Radical and Antioxidant Health and Center for Medical Countermeasures against Radiation, University of Pittsburgh, Pittsburgh, PA 15219, USA; Department of Critical Care Medicine, Safar Center for Resuscitation Research, University of Pittsburgh, Pittsburgh, PA 15219, USA.
| | - Valerian E Kagan
- Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, PA 15219, USA; Center for Free Radical and Antioxidant Health and Center for Medical Countermeasures against Radiation, University of Pittsburgh, Pittsburgh, PA 15219, USA; Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15219, USA; Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, PA 15219, USA; Department of Radiation Oncology, University of Pittsburgh, Pittsburgh, PA 15219, USA.
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26
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Reuss S, Wystub S, Disque-Kaiser U, Hankeln T, Burmester T. Distribution of Cytoglobin in the Mouse Brain. Front Neuroanat 2016; 10:47. [PMID: 27199679 PMCID: PMC4847482 DOI: 10.3389/fnana.2016.00047] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 04/11/2016] [Indexed: 01/07/2023] Open
Abstract
Cytoglobin (Cygb) is a vertebrate globin with so far poorly defined function. It is expressed in the fibroblast cell-lineage but has also been found in neurons. Here we provide, using immunohistochemistry, a detailed study on the distribution of Cygb in the mouse brain. While Cygb is a cytoplasmic protein in active cells of the supportive tissue, in neurons it is located in the cytoplasm and the nucleus. We found the expression of Cygb in all brain regions, although only a fraction of the neurons was Cygb-positive. Signals were of different intensity ranging from faint to very intense. Telencephalic neurons in all laminae of the cerebral cortex (CCo), in the olfactory bulb (in particular periglomerular cells), in the hippocampal formation (strongly stained pyramidal cells with long processes), basal ganglia (scattered multipolar neurons in the dorsal striatum, dorsal and ventral pallidum (VP)), and in the amygdala (neurons with unlabeled processes) were labeled by the antibody. In the diencephalon, we observed Cygb-positive neurons of moderate intensity in various nuclei of the dorsal thalamus, in the hypothalamus, metathalamus (geniculate nuclei), epithalamus with strong labeling of habenular nucleus neurons and no labeling of pineal cells, and in the ventral thalamus. Tegmental neurons stood out by strongly stained somata with long processes in, e.g., the laterodorsal nucleus. In the tectum, faintly labeled neurons and fibers were detected in the superior colliculus (SC). The cerebellum exhibited unlabeled Purkinje-neurons but signs of strong afferent cortical innervation. Neurons in the gray matter of the spinal cord showed moderate immunofluorescence. Peripheral ganglia were not labeled by the antibody. The Meynert-fascicle and the olfactory and optic nerves/tracts were the only Cygb-immunoreactive (Cygb-IR) fiber systems. Notably, we found a remarkable level of colocalization of Cygb and neuronal nitric oxide (NO)-synthase in neurons, which supports a functional association.
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Affiliation(s)
- Stefan Reuss
- Department of Nuclear Medicine, University Medical Center, Johannes Gutenberg-University Mainz, Germany
| | - Sylvia Wystub
- Institute of Molecular Genetics, Johannes Gutenberg-University Mainz, Germany
| | - Ursula Disque-Kaiser
- Department of Anatomy and Cell Biology, University Medical Center, Johannes Gutenberg-University Mainz, Germany
| | - Thomas Hankeln
- Institute of Molecular Genetics, Johannes Gutenberg-University Mainz, Germany
| | - Thorsten Burmester
- Institute of Zoology and Zoological Museum, University of Hamburg Hamburg, Germany
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27
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Zhao C, Du W. Dynamic features of carboxy cytoglobin distal mutants investigated by molecular dynamics simulations. J Biol Inorg Chem 2016; 21:251-61. [DOI: 10.1007/s00775-016-1334-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Accepted: 01/04/2016] [Indexed: 01/08/2023]
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28
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Kawada N. Cytoglobin as a Marker of Hepatic Stellate Cell-derived Myofibroblasts. Front Physiol 2015; 6:329. [PMID: 26617531 PMCID: PMC4643130 DOI: 10.3389/fphys.2015.00329] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Accepted: 10/30/2015] [Indexed: 12/13/2022] Open
Abstract
Myofibroblasts play important roles in inflammation, fibrosis and tumorigenesis in chronically inflamed liver. Liver myofibroblasts originate from hepatic stellate cells, portal fibroblasts or mesothelial cells, and they are localized in and around fibrotic septum and portal tracts. Liver myofibroblasts are the source of extracellular matrix materials, including type I collagen and multiple fibrogenic growth factors, such as transforming growth factor-β and vascular endothelial growth factor. Although a detailed characterization of the function of individual myofibroblasts has not been conducted, owing to the lack of appropriate cell markers, recent lineage-tracing technology has revealed the limited contribution of myofibroblasts that are derived from portal fibroblasts to various types of liver fibrosis, as compared with the contribution of hepatic stellate cells. In addition, cytoglobin, which is the fourth globin in mammals and function as a local gas sensor, provides a new perspective on the involvement of stellate cells in fibrosis and carcinogenesis, possibly through its anti-oxidative properties and is a promising new marker that discriminates between myofibroblasts derived from stellate cells and those from portal fibroblasts.
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Affiliation(s)
- Norifumi Kawada
- Department of Hepatology, Graduate School of Medicine, Osaka City University Osaka, Japan
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29
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Latina A, Viticchiè G, Lena AM, Piro MC, Annicchiarico-Petruzzelli M, Melino G, Candi E. ΔNp63 targets cytoglobin to inhibit oxidative stress-induced apoptosis in keratinocytes and lung cancer. Oncogene 2015; 35:1493-503. [PMID: 26096935 DOI: 10.1038/onc.2015.222] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Revised: 02/17/2015] [Accepted: 03/08/2015] [Indexed: 12/13/2022]
Abstract
During physiological aerobic metabolism, the epidermis undergoes significant oxidative stress as a result of the production of reactive oxygen species (ROS). To maintain a balanced oxidative state, cells have developed protective antioxidant systems, and preliminary studies suggest that the transcriptional factor p63 is involved in cellular oxidative defence. Supporting this hypothesis, the ΔNp63α isoform of p63 is expressed at high levels in the proliferative basal layer of the epidermis. Here we identify the CYGB gene as a novel transcriptional target of ΔNp63 that is involved in maintaining epidermal oxidative defence. The CYGB gene encodes cytoglobin, a member of the globin protein family, which facilitates the diffusion of oxygen through tissues and acts as a scavenger for nitric oxide or other ROS. By performing promoter activity assays and chromatin immunoprecipitation, reverse transcriptase quantitative PCR and western blotting analyses, we confirm the direct regulation of CYGB by ΔNp63α. We also demonstrate that CYGB has a protective role in proliferating keratinocytes grown under normal conditions, as well as in cells treated with exogenous hydrogen peroxide. These results indicate that ΔNp63, through its target CYGB has an important role in the cellular antioxidant system and protects keratinocytes from oxidative stress-induced apoptosis. The ΔNp63-CYGB axis is also present in lung and breast cancer cell lines, indicating that CYGB-mediated ROS-scavenging activity may also have a role in epithelial tumours. In human lung cancer data sets, the p63-CYGB interaction significantly predicts reduction of patient survival.
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Affiliation(s)
- A Latina
- Department of Experimental Medicine and Surgery, University of Rome 'Tor Vergata', Rome, Italy
| | - G Viticchiè
- Department of Experimental Medicine and Surgery, University of Rome 'Tor Vergata', Rome, Italy
| | - A M Lena
- Department of Experimental Medicine and Surgery, University of Rome 'Tor Vergata', Rome, Italy
| | - M C Piro
- Department of Experimental Medicine and Surgery, University of Rome 'Tor Vergata', Rome, Italy
| | | | - G Melino
- Department of Experimental Medicine and Surgery, University of Rome 'Tor Vergata', Rome, Italy.,Medical Research Council Toxicology Unit, Leicester, UK
| | - E Candi
- Department of Experimental Medicine and Surgery, University of Rome 'Tor Vergata', Rome, Italy.,IDI-IRCCS, Biochemistry Laboratory, Rome, Italy
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30
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McLean LS, Watkins CN, Campbell P, Zylstra D, Rowland L, Amis LH, Scott L, Babb CE, Livingston WJ, Darwanto A, Davis WL, Senthil M, Sowers LC, Brantley E. Aryl Hydrocarbon Receptor Ligand 5F 203 Induces Oxidative Stress That Triggers DNA Damage in Human Breast Cancer Cells. Chem Res Toxicol 2015; 28:855-71. [PMID: 25781201 DOI: 10.1021/tx500485v] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Breast tumors often show profound sensitivity to exogenous oxidative stress. Investigational agent 2-(4-amino-3-methylphenyl)-5-fluorobenzothiazole (5F 203) induces aryl hydrocarbon receptor (AhR)-mediated DNA damage in certain breast cancer cells. Since AhR agonists often elevate intracellular oxidative stress, we hypothesize that 5F 203 increases reactive oxygen species (ROS) to induce DNA damage, which thwarts breast cancer cell growth. We found that 5F 203 induced single-strand break formation. 5F 203 enhanced oxidative DNA damage that was specific to breast cancer cells sensitive to its cytotoxic actions, as it did not increase oxidative DNA damage or ROS formation in nontumorigenic MCF-10A breast epithelial cells. In contrast, AhR agonist and procarcinogen benzo[a]pyrene and its metabolite, 1,6-benzo[a]pyrene quinone, induced oxidative DNA damage and ROS formation, respectively, in MCF-10A cells. In sensitive breast cancer cells, 5F 203 activated ROS-responsive kinases: c-Jun-N-terminal kinase (JNK) and p38 mitogen activated protein kinase (p38). AhR antagonists (alpha-naphthoflavone, CH223191) or antioxidants (N-acetyl-l-cysteine, EUK-134) attenuated 5F 203-mediated JNK and p38 activation, depending on the cell type. Pharmacological inhibition of AhR, JNK, or p38 attenuated 5F 203-mediated increases in intracellular ROS, apoptosis, and single-strand break formation. 5F 203 induced the expression of cytoglobin, an oxidative stress-responsive gene and a putative tumor suppressor, which was diminished with AhR, JNK, or p38 inhibition. Additionally, 5F 203-mediated increases in ROS production and cytoglobin were suppressed in AHR100 cells (AhR ligand-unresponsive MCF-7 breast cancer cells). Our data demonstrate 5F 203 induces ROS-mediated DNA damage at least in part via AhR, JNK, or p38 activation and modulates the expression of oxidative stress-responsive genes such as cytoglobin to confer its anticancer action.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | - Lawrence C Sowers
- ⊥Department of Pharmacology and Toxicology, University of Texas Medical Branch at Galveston, Galveston, Texas 77555, United States
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31
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Genome-wide DNA methylation as an epigenetic consequence of Epstein-Barr virus infection of immortalized keratinocytes. J Virol 2014; 88:11442-58. [PMID: 25056883 DOI: 10.1128/jvi.00972-14] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
UNLABELLED The oral cavity is a persistent reservoir for Epstein-Barr virus (EBV) with lifelong infection of resident epithelial and B cells. Infection of these cell types results in distinct EBV gene expression patterns regulated by epigenetic modifications involving DNA methylation and chromatin structure. Regulation of EBV gene expression relies on viral manipulation of the host epigenetic machinery that may result in long-lasting host epigenetic reprogramming. To identify epigenetic events following EBV infection, a transient infection model was established to map epigenetic changes in telomerase-immortalized oral keratinocytes. EBV-infected oral keratinocytes exhibited a predominantly latent viral gene expression program with some lytic or abortive replication. Calcium and methylcellulose-induced differentiation was delayed in EBV-positive clones and in clones that lost EBV compared to uninfected controls, indicating a functional consequence of EBV epigenetic modifications. Analysis of global cellular DNA methylation identified over 13,000 differentially methylated CpG residues in cells exposed to EBV compared to uninfected controls, with CpG island hypermethylation observed at several cellular genes. Although the vast majority of the DNA methylation changes were silent, 65 cellular genes that acquired CpG methylation showed altered transcript levels. Genes with increased transcript levels frequently acquired DNA methylation within the gene body while those with decreased transcript levels acquired DNA methylation near the transcription start site. Treatment with the DNA methyltransferase inhibitor, decitabine, restored expression of some hypermethylated genes in EBV-infected and EBV-negative transiently infected clones. Overall, these observations suggested that EBV infection of keratinocytes leaves a lasting epigenetic imprint that can enhance the tumorigenic phenotype of infected cells. IMPORTANCE Here, we show that EBV infection of oral keratinocytes led to CpG island hypermethylation as an epigenetic scar of prior EBV infection that was retained after loss of the virus. Such EBV-induced epigenetic modification recapitulated the hypermethylated CpG island methylator phenotype (CIMP) observed in EBV-associated carcinomas. These epigenetic alterations not only impacted gene expression but also resulted in delayed calcium and methylcellulose-induced keratinocyte differentiation. Importantly, these epigenetic changes occurred in cells that were not as genetically unstable as carcinoma cells, indicating that EBV infection induced an epigenetic mutator phenotype. The impact of this work is that we have provided a mechanistic framework for how a tumor virus using the epigenetic machinery can act in a "hit-and-run" fashion, with retention of epigenetic alterations after loss of the virus. Unlike genetic alterations, these virally induced epigenetic changes can be reversed pharmacologically, providing therapeutic interventions to EBV-associated malignancies.
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32
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Burmester T, Hankeln T. Function and evolution of vertebrate globins. Acta Physiol (Oxf) 2014; 211:501-14. [PMID: 24811692 DOI: 10.1111/apha.12312] [Citation(s) in RCA: 148] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Revised: 04/17/2014] [Accepted: 04/30/2014] [Indexed: 02/06/2023]
Abstract
Globins are haem-proteins that bind O2 and thus play an important role in the animal's respiration and oxidative energy production. However, globins may also have other functions such as the decomposition or production of NO, the detoxification of reactive oxygen species or intracellular signalling. In addition to the well-investigated haemoglobins and myoglobins, genome sequence analyses have led to the identification of six further globin types in vertebrates: androglobin, cytoglobin, globin E, globin X, globin Y and neuroglobin. Here, we review the present state of knowledge on the functions, the taxonomic distribution and evolution of vertebrate globins, drawing conclusions about the functional changes underlying present-day globin diversity.
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Affiliation(s)
- T. Burmester
- Institute of Zoology and Zoological Museum; University of Hamburg; Hamburg Germany
| | - T. Hankeln
- Institute of Molecular Genetics; Johannes Gutenberg-University Mainz; Mainz Germany
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33
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Chakraborty S, John R, Nag A. Cytoglobin in tumor hypoxia: novel insights into cancer suppression. Tumour Biol 2014; 35:6207-19. [PMID: 24816917 DOI: 10.1007/s13277-014-1992-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2014] [Accepted: 04/17/2014] [Indexed: 01/19/2023] Open
Abstract
Emerging new and intriguing roles of cytoglobin (Cygb) have attracted considerable attention of cancer researchers in recent years. Hypoxic upregulation of Cygb as well as its altered expression in various human cancers suggest another possible role of this newly discovered globin in tumor cell response under low oxygen tension. Since tumor hypoxia is strongly associated with malignant progression of disease and poor treatment response, it constitutes an area of paramount importance for rational design of cancer selective therapies. However, the mechanisms involved during this process are still elusive. This review outlines the current understanding of Cygb's involvement in tumor hypoxia and discusses its role in tumorigenesis. A better perception of Cygb in tumor hypoxia response is likely to open novel perspectives for future tumor therapy.
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Affiliation(s)
- Sankalpa Chakraborty
- Department of Biochemistry, University of Delhi South Campus, Benito Juarez Marg, New Delhi, 110021, India
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34
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Hubers AJ, van der Drift MA, Prinsen CFM, Witte BI, Wang Y, Shivapurkar N, Stastny V, Bolijn AS, Hol BEA, Feng Z, Dekhuijzen PNR, Gazdar AF, Thunnissen E. Methylation analysis in spontaneous sputum for lung cancer diagnosis. Lung Cancer 2014; 84:127-33. [PMID: 24598366 DOI: 10.1016/j.lungcan.2014.01.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Revised: 01/20/2014] [Accepted: 01/22/2014] [Indexed: 02/03/2023]
Abstract
OBJECTIVES Lung cancer is the most fatal cancer in the developed world due to presence of metastases at time of diagnosis. The aim of this study is to examine DNA hypermethylation in sputum compared to sputum cytology for the diagnosis of lung cancer. A novel risk analysis is introduced, using the distinction between diagnostic and risk markers. METHODS Two independent sets were randomly composed from a prospectively collected sputum bank (Set 1: n = 98 lung cancer patients, n = 90 controls; Set 2: n = 60 lung cancer patients, n = 445 controls). Sputum cytology was performed for all samples. The following DNA hypermethylation markers were tested in both sets: RASSF1A, APC and cytoglobin (CYGB). Two statistical analyses were conducted: multivariate logistic regression and a risk classification model based on post-test probabilities. RESULTS In multivariate analysis, RASSF1A was the best of the three markers in discriminating lung cancer cases from controls in both sets (sensitivity 41-52%, specificity 94-96%). The risk model showed that 36% of lung cancer patients were defined as "high risk" (≥ 60% chance on lung cancer) based on RASSF1A hypermethylation in Set 1. The model was reproducible in Set 2. Risk markers (APC, CYGB) have less diagnostic value. Sensitivity of cytology for lung cancer diagnosis was 22%. RASSF1A hypermethylation yielded a sensitivity of 45%. The combined sensitivity for RASSF1A with cytological diagnosis increased to 52% with similar specificity (94%). CONCLUSION In a diagnostic setting, hypermethylation analysis in sputum is possible when a diagnostic marker is used. However, risk markers are insufficient for this purpose.
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Affiliation(s)
- A Jasmijn Hubers
- Department of Pathology, VU University Medical Center, Amsterdam, The Netherlands
| | - Miep A van der Drift
- Department of Pulmonology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Clemens F M Prinsen
- Department of Pathology, Canisius-Wilhelmina Hospital, Nijmegen, The Netherlands
| | - Birgit I Witte
- Department of Epidemiology and Biostatistics, VU University Medical Center, Amsterdam, The Netherlands
| | - Yinghui Wang
- Fred Hutchinson Cancer Research Center, Seattle, USA
| | - Narayan Shivapurkar
- Hamon Center for Therapeutic Oncology Research, UT Southwestern Medical Center, Dallas, USA
| | - Victor Stastny
- Hamon Center for Therapeutic Oncology Research, UT Southwestern Medical Center, Dallas, USA
| | - Anne S Bolijn
- Department of Pathology, Canisius-Wilhelmina Hospital, Nijmegen, The Netherlands
| | - Bernard E A Hol
- Department of Pulmonology, Canisius Wilhelmina Hospital, Nijmegen, The Netherlands
| | - Ziding Feng
- Fred Hutchinson Cancer Research Center, Seattle, USA
| | - P N Richard Dekhuijzen
- Department of Pulmonology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Adi F Gazdar
- Hamon Center for Therapeutic Oncology Research, UT Southwestern Medical Center, Dallas, USA
| | - Erik Thunnissen
- Department of Pathology, Canisius-Wilhelmina Hospital, Nijmegen, The Netherlands.
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