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Tomiyama E, Fujita K, Matsuzaki K, Narumi R, Yamamoto A, Uemura T, Yamamichi G, Koh Y, Matsushita M, Hayashi Y, Hashimoto M, Banno E, Kato T, Hatano K, Kawashima A, Uemura M, Ukekawa R, Takao T, Takada S, Uemura H, Adachi J, Tomonaga T, Nonomura N. EphA2 on urinary extracellular vesicles as a novel biomarker for bladder cancer diagnosis and its effect on the invasiveness of bladder cancer. Br J Cancer 2022; 127:1312-1323. [PMID: 35794239 DOI: 10.1038/s41416-022-01860-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 04/25/2022] [Accepted: 05/11/2022] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Urinary extracellular vesicles (uEVs) secreted from bladder cancer contain cancer-specific proteins that are potential diagnostic biomarkers. We identified and evaluated a uEV-based protein biomarker for bladder cancer diagnosis and analysed its functions. METHODS Biomarker candidates, selected by shotgun proteomics, were validated using targeted proteomics of uEVs obtained from 49 patients with and 48 individuals without bladder cancer, including patients with non-malignant haematuria. We developed an enzyme-linked immunosorbent assay (ELISA) for quantifying the uEV protein biomarker without ultracentrifugation and evaluated urine samples from 36 patients with and 36 patients without bladder cancer. RESULTS Thirteen membrane proteins were significantly upregulated in the uEVs from patients with bladder cancer in shotgun proteomics. Among them, eight proteins were validated by target proteomics, and Ephrin type-A receptor 2 (EphA2) was the only protein significantly upregulated in the uEVs of patients with bladder cancer, compared with that of patients with non-malignant haematuria. The EV-EphA2-CD9 ELISA demonstrated good diagnostic performance (sensitivity: 61.1%, specificity: 97.2%). We showed that EphA2 promotes proliferation, invasion and migration and EV-EphA2 promotes the invasion and migration of bladder cancer cells. CONCLUSIONS We established EV-EphA2-CD9 ELISA for uEV-EphA2 detection for the non-invasive early clinical diagnosis of bladder cancer.
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Affiliation(s)
- Eisuke Tomiyama
- Department of Urology, Osaka University Graduate School of Medicine, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Kazutoshi Fujita
- Department of Urology, Osaka University Graduate School of Medicine, Yamadaoka, Suita, Osaka, 565-0871, Japan. .,Department of Urology, Kindai University Faculty of Medicine, Ohno-Higashi, Osaka-Sayama, Osaka, 589-8511, Japan.
| | - Kyosuke Matsuzaki
- Department of Urology, Osaka University Graduate School of Medicine, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Ryohei Narumi
- Laboratory of Proteome Research, National Institutes of Biomedical Innovation, Health and Nutrition, Saito-Asagi, Ibaraki, Osaka, 567-0085, Japan
| | - Akinaru Yamamoto
- Department of Urology, Osaka University Graduate School of Medicine, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Toshihiro Uemura
- Department of Urology, Osaka University Graduate School of Medicine, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Gaku Yamamichi
- Department of Urology, Osaka University Graduate School of Medicine, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yoko Koh
- Department of Urology, Osaka University Graduate School of Medicine, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Makoto Matsushita
- Department of Urology, Osaka University Graduate School of Medicine, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yujiro Hayashi
- Department of Urology, Osaka University Graduate School of Medicine, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Mamoru Hashimoto
- Department of Urology, Kindai University Faculty of Medicine, Ohno-Higashi, Osaka-Sayama, Osaka, 589-8511, Japan
| | - Eri Banno
- Department of Urology, Kindai University Faculty of Medicine, Ohno-Higashi, Osaka-Sayama, Osaka, 589-8511, Japan
| | - Taigo Kato
- Department of Urology, Osaka University Graduate School of Medicine, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Koji Hatano
- Department of Urology, Osaka University Graduate School of Medicine, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Atsunari Kawashima
- Department of Urology, Osaka University Graduate School of Medicine, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Motohide Uemura
- Department of Urology, Osaka University Graduate School of Medicine, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Ryo Ukekawa
- FUJIFILM Wako Pure Chemical Corporation, Takata-cho, Amagasaki, Hyogo, 661-0963, Japan
| | - Tetsuya Takao
- Department of Urology, Osaka General Medical Center, Bandai-higashi, Sumiyoshi-ku, Osaka, 558-8558, Japan
| | - Shingo Takada
- Department of Urology, Osaka Police Hospital, Kitayama-cho, Tennoji-ku, Osaka, 543-0035, Japan
| | - Hirotsugu Uemura
- Department of Urology, Kindai University Faculty of Medicine, Ohno-Higashi, Osaka-Sayama, Osaka, 589-8511, Japan
| | - Jun Adachi
- Laboratory of Proteome Research, National Institutes of Biomedical Innovation, Health and Nutrition, Saito-Asagi, Ibaraki, Osaka, 567-0085, Japan
| | - Takeshi Tomonaga
- Laboratory of Proteome Research, National Institutes of Biomedical Innovation, Health and Nutrition, Saito-Asagi, Ibaraki, Osaka, 567-0085, Japan
| | - Norio Nonomura
- Department of Urology, Osaka University Graduate School of Medicine, Yamadaoka, Suita, Osaka, 565-0871, Japan
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Bader SB, Dewhirst MW, Hammond EM. Cyclic Hypoxia: An Update on Its Characteristics, Methods to Measure It and Biological Implications in Cancer. Cancers (Basel) 2020; 13:E23. [PMID: 33374581 PMCID: PMC7793090 DOI: 10.3390/cancers13010023] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 12/14/2020] [Accepted: 12/16/2020] [Indexed: 02/07/2023] Open
Abstract
Regions of hypoxia occur in most if not all solid cancers. Although the presence of tumor hypoxia is a common occurrence, the levels of hypoxia and proportion of the tumor that are hypoxic vary significantly. Importantly, even within tumors, oxygen levels fluctuate due to changes in red blood cell flux, vascular remodeling and thermoregulation. Together, this leads to cyclic or intermittent hypoxia. Tumor hypoxia predicts for poor patient outcome, in part due to increased resistance to all standard therapies. However, it is less clear how cyclic hypoxia impacts therapy response. Here, we discuss the causes of cyclic hypoxia and, importantly, which imaging modalities are best suited to detecting cyclic vs. chronic hypoxia. In addition, we provide a comparison of the biological response to chronic and cyclic hypoxia, including how the levels of reactive oxygen species and HIF-1 are likely impacted. Together, we highlight the importance of remembering that tumor hypoxia is not a static condition and that the fluctuations in oxygen levels have significant biological consequences.
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Affiliation(s)
- Samuel B. Bader
- Department of Oncology, The Oxford Institute for Radiation Oncology, Oxford University, Oxford OX3 7DQ, UK;
| | - Mark W. Dewhirst
- Radiation Oncology Department, Duke University School of Medicine, Durham, NC 27710, USA
| | - Ester M. Hammond
- Department of Oncology, The Oxford Institute for Radiation Oncology, Oxford University, Oxford OX3 7DQ, UK;
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Shih YM, Cooke MS, Pan CH, Chao MR, Hu CW. Clinical relevance of guanine-derived urinary biomarkers of oxidative stress, determined by LC-MS/MS. Redox Biol 2018; 20:556-565. [PMID: 30508700 PMCID: PMC6279954 DOI: 10.1016/j.redox.2018.11.016] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 11/18/2018] [Accepted: 11/23/2018] [Indexed: 12/13/2022] Open
Abstract
A reliable and fast liquid chromatography-tandem mass spectrometry method has been developed for the simultaneous determination of three oxidized nucleic acid damage products in urine, 8-oxoguanine (8-oxoGua), 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxodGuo) and 8-oxo-7,8-dihydroguanosine (8-oxoGuo). We applied this method to assess the effect of various urine workup procedures on the urinary concentrations of the oxidized nucleic acid products. Our results showed that frozen urine samples must be warmed (i.e., to 37 °C) to re-dissolve any precipitates prior to analysis. We showed that common workup procedures, such as thawing at room temperature or dilution with deionized water, are not capable of releasing fully the oxidized nucleic acid products from the precipitates, and result in significant underestimation (up to ~ 100% for 8-oxoGua, ~ 86% for both 8-oxodGuo and 8-oxoGuo). With this method, we further assessed and compared the ability of the three oxidized nucleic acid products, as well as malondialdehyde (MDA, a product of lipid peroxidation), to biomonitor oxidative stress in vivo. We measured a total of 315 urine samples from subjects with burdens of oxidative stress from low to high, including healthy subjects, patients with chronic obstructive pulmonary disease (COPD), and patients on mechanical ventilation (MV). The results showed that both the MV and COPD patients had significantly higher urinary levels of 8-oxoGua, 8-oxodGuo, and 8-oxoGuo (P < 0.001), but lower MDA levels, compared to healthy controls. Receiver operating characteristic curve analysis revealed that urinary 8-oxoGuo is the most sensitive biomarker for oxidative stress with area under the curve (AUC) of 0.91, followed by 8-oxodGuo (AUC: 0.80) and 8-oxoGua (AUC: 0.76). Interestingly, MDA with AUC of 0.34 failed to discriminate the patients from healthy controls. Emerging evidence suggests a potential clinical utility for the measurement of urinary 8-oxoGuo, and to a lesser extent 8-oxodGuo, which is strongly supported by our findings.
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Affiliation(s)
- Ying-Ming Shih
- Department of Public Health, Chung Shan Medical University, Taichung 402, Taiwan; Division of Chest Medicine, Department of Internal Medicine, Changhua Christian Hospital, Changhua 500, Taiwan
| | - Marcus S Cooke
- Oxidative Stress Group, Department of Environmental Health Sciences, and Biomolecular Sciences Institute, Florida International University, Miami, FL 33199, USA
| | - Chih-Hong Pan
- Institute of Labor, Occupational Safety and Health, Ministry of Labor, New Taipei City 221, Taiwan
| | - Mu-Rong Chao
- Department of Occupational Safety and Health, Chung Shan Medical University, Taichung 402, Taiwan.
| | - Chiung-Wen Hu
- Department of Public Health, Chung Shan Medical University, Taichung 402, Taiwan; Department of Family and Community Medicine, Chung Shan Medical University Hospital, Taichung 402, Taiwan.
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Hu L, Tang J, Huang X, Zhang T, Feng X. Hypoxia exposure upregulates MALAT-1 and regulates the transcriptional activity of PTB-associated splicing factor in A549 lung adenocarcinoma cells. Oncol Lett 2018; 16:294-300. [PMID: 29928414 PMCID: PMC6006348 DOI: 10.3892/ol.2018.8637] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 02/15/2018] [Indexed: 12/11/2022] Open
Abstract
Hypoxia has been reported to be a critical microenvironmental factor that induces cancer metastasis and proliferation in gastric, liver and hepatic cancers; however, the underlying mechanisms of this are largely unknown. Long noncoding RNAs (lncRNAs) have emerged as crucial factors of several aspects of tumor malignancy, including tumorigenesis, metastasis and chemoresistance. However, the potential association of lncRNAs with hypoxia-induced cancer malignancy remains to be determined. In the present study, the differential expression of lncRNAs following the induction of hypoxia in A549 lung adenocarcinoma cells was analyzed reverse transcription-quantitative polymerase chain reaction. It was identified that the lncRNA metastasis-associated lung adenocarcinoma transcript-1 (MALAT-1) was upregulated significantly by hypoxia in A549 cells. By considering its promotive effects on malignant tumor behaviors, in the present study, it was identified that upregulated MALAT-1 released the binding of PTB-associated splicing factor (PSF) to its target gene, GAGE6, and thus promoted proliferation, migration and invasion of A549 cells following hypoxia exposure. These results advance the overall understanding of the mechanism of hypoxia-induced lung cancer metastasis and may assist in the development of novel therapeutics.
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Affiliation(s)
- Ling Hu
- Department of Pathology, Chongqing Three Gorges Medical College, Chongqing 400000, P.R. China
| | - Jing Tang
- Department of Pathology, Chongqing Three Gorges Medical College, Chongqing 400000, P.R. China
| | - Xiaohuan Huang
- Department of Pathology, Chongqing Three Gorges Medical College, Chongqing 400000, P.R. China
| | - Tao Zhang
- Department of Pathology, Chongqing Three Gorges Medical College, Chongqing 400000, P.R. China
| | - Xiaoling Feng
- Department of Pathology, Chongqing Three Gorges Medical College, Chongqing 400000, P.R. China
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Michiels C, Tellier C, Feron O. Cycling hypoxia: A key feature of the tumor microenvironment. Biochim Biophys Acta Rev Cancer 2016; 1866:76-86. [PMID: 27343712 DOI: 10.1016/j.bbcan.2016.06.004] [Citation(s) in RCA: 118] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2016] [Revised: 06/18/2016] [Accepted: 06/21/2016] [Indexed: 01/06/2023]
Abstract
A compelling body of evidence indicates that most human solid tumors contain hypoxic areas. Hypoxia is the consequence not only of the chaotic proliferation of cancer cells that places them at distance from the nearest capillary but also of the abnormal structure of the new vasculature network resulting in transient blood flow. Hence two types of hypoxia are observed in tumors: chronic and cycling (intermittent) hypoxia. Most of the current work aims at understanding the role of chronic hypoxia in tumor growth, response to treatment and metastasis. Only recently, cycling hypoxia, with spatial and temporal fluctuations in oxygen levels, has emerged as another key feature of the tumor environment that triggers different responses in comparison to chronic hypoxia. Either type of hypoxia is associated with distinct effects not only in cancer cells but also in stromal cells. In particular, cycling hypoxia has been demonstrated to favor, to a higher extent than chronic hypoxia, angiogenesis, resistance to anti-cancer treatments, intratumoral inflammation and tumor metastasis. These review details these effects as well as the signaling pathway it triggers to switch on specific transcriptomic programs. Understanding the signaling pathways through which cycling hypoxia induces these processes that support the development of an aggressive cancer could convey to the emergence of promising new cancer treatments.
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Affiliation(s)
- Carine Michiels
- URBC-NARILIS, University of Namur, 61 rue de Bruxelles, 5000 Namur, Belgium.
| | - Céline Tellier
- URBC-NARILIS, University of Namur, 61 rue de Bruxelles, 5000 Namur, Belgium
| | - Olivier Feron
- Pole of Pharmacology and Therapeutics (FATH), Institut de Recherche Expérimentale et Clinique (IREC), Université catholique de Louvain, 53 Avenue Mounier, B1.53.09, B-1200 Brussels, Belgium.
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Zepeda AB, Pessoa A, Castillo RL, Figueroa CA, Pulgar VM, Farías JG. Cellular and molecular mechanisms in the hypoxic tissue: role of HIF-1 and ROS. Cell Biochem Funct 2013; 31:451-9. [PMID: 23760768 DOI: 10.1002/cbf.2985] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Accepted: 05/14/2013] [Indexed: 01/18/2023]
Abstract
Reactive oxygen species such as superoxide anion radicals (O2 (-) ) and hydrogen peroxide (H2 O2 ) have for long time been recognized as undesirable by-products of the oxidative mitochondrial generation of adenosine triphosphate (ATP). Recently, these highly reactive species have been associated to important signaling pathways in diverse physiological conditions such as those activated in hypoxic microenvironments. The molecular response to hypoxia requires fast-acting mechanisms acting within a wide range of partial pressures of oxygen (O2 ). Intracellular O2 sensing is an evolutionary preserved feature, and the best characterized molecular responses to hypoxia are mediated through transcriptional activation. The transcription factor, hypoxia-inducible factor 1 (HIF-1), is a critical mediator of these adaptive responses, and its activation by hypoxia involves O2 -dependent posttranslational modifications and nuclear translocation. Through the induction of the expression of its target genes, HIF-1 coordinately regulates tissue O2 supply and energetic metabolism. Other transcription factors such as nuclear factor κB are also redox sensitive and are activated in pro-oxidant and hypoxic conditions. The purpose of this review is to summarize new developments in HIF-mediated O2 sensing mechanisms and their interactions with reactive oxygen species-generating pathways in normal and abnormal physiology.
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Affiliation(s)
- Andrea B Zepeda
- Facultad de Ingeniería, Departamento de Ingeniería Química, Ciencias y Administración, Universidad de La Frontera, Casilla 54-D, Temuco, Chile
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7
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Baghbani F, Raoofian R, Hasanzadeh Nazarabadi M, Hamzehloei T, Soukhtanloo M, Heidari M, Afsharzadeh SM, Shekouhi S, Moradi F, Sarli AA, Zavar-Reza J, Mojarrad M. Identification of novel hypoxia response genes in human glioma cell line a172. IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES 2013; 16:675-82. [PMID: 23826488 PMCID: PMC3700041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Accepted: 10/10/2012] [Indexed: 12/02/2022]
Abstract
OBJECTIVE(S) Hypoxia is a serious challenge for treatment of solid tumors. This condition has been manifested to exert significant therapeutic effects on glioblastoma multiform or (WHO) astrocytoma grade IV. Hypoxia contributes numerous changes in cellular mechanisms such as angiogenesis, metastasis and apoptosis evasion. Furthermore, in molecular level, hypoxia can cause induction of DNA breaks in tumor cells. Identification of mechanisms responsible for these effects can lead to designing more efficient therapeutic strategies against tumor progression which results in improvement of patient prognosis. Materials and Methods : In order to identify more hypoxia regulated genes which may have a role in glioblastoma progression, cDNA-AFLP was optimized as a Differential display method which is able to identify and isolate transcripts with no prior sequence knowledge. RESULTS Using this method, the current study identified 120 Transcription Derived Fragments (TDFs) which were completely differentially regulated in response to hypoxia. By sequence homology searching, the current study could detect 22 completely differentially regulated known genes and two unknown sequence matching with two chromosome contig and four sequence matches with some Expressed Sequence Tags (ESTs). CONCLUSION Further characterizing of these genes may help to achieve better understanding of hypoxia mediated phenotype change in tumor cells.
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Affiliation(s)
- Fatemeh Baghbani
- Department of Medical Genetics, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Reza Raoofian
- Department of Medical Genetics, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | | | - Tayebeh Hamzehloei
- Department of Medical Genetics, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohammad Soukhtanloo
- Department of Clinical Biochemistry, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mansur Heidari
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Seyed Morteza Afsharzadeh
- Department of Medical Genetics, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Sahar Shekouhi
- Department of Medical Genetics, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Fahimeh Moradi
- Department of Medical Genetics, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Abdol-Azim Sarli
- Department of Medical Genetics, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Javad Zavar-Reza
- Department of Clinical Biochemistry, School of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Majid Mojarrad
- Department of Medical Genetics, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran,Corresponding author: Majid Mojarrad, Ferdowsi Department of Medical Genetics, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran. Tel: +98-511-8002243; +98-9158154330;
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8
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Antonio HMR, Mandarano LRM, Coelho AA, Tiezzi MG, Andrade JMD, Tiezzi DG. Mouse renal 4T1 cell engraftment as a model to study the influence of hypoxia in breast cancer progression. Acta Cir Bras 2013; 28:142-7. [DOI: 10.1590/s0102-86502013000200010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Accepted: 12/20/2012] [Indexed: 11/22/2022] Open
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Gaustad JV, Simonsen TG, Roa AMA, Rofstad EK. Tumors exposed to acute cyclic hypoxia show increased vessel density and delayed blood supply. Microvasc Res 2013; 85:10-5. [DOI: 10.1016/j.mvr.2012.11.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Revised: 10/30/2012] [Accepted: 11/04/2012] [Indexed: 01/17/2023]
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10
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Yu L, Hales CA. Long-term exposure to hypoxia inhibits tumor progression of lung cancer in rats and mice. BMC Cancer 2011; 11:331. [PMID: 21812995 PMCID: PMC3199866 DOI: 10.1186/1471-2407-11-331] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2011] [Accepted: 08/03/2011] [Indexed: 12/24/2022] Open
Abstract
Background Hypoxia has been identified as a major negative factor for tumor progression in clinical observations and in animal studies. However, the precise role of hypoxia in tumor progression has not been fully explained. In this study, we extensively investigated the effect of long-term exposure to hypoxia on tumor progression in vivo. Methods Rats bearing transplanted tumors consisting of A549 human lung cancer cells (lung cancer tumor) were exposed to hypoxia for different durations and different levels of oxygen. The tumor growth and metastasis were evaluated. We also treated A549 lung cancer cells (A549 cells) with chronic hypoxia and then implanted the hypoxia-pretreated cancer cells into mice. The effect of exposure to hypoxia on metastasis of Lewis lung carcinoma in mice was also investigated. Results We found that long-term exposure to hypoxia a) significantly inhibited lung cancer tumor growth in xenograft and orthotopic models in rats, b) significantly reduced lymphatic metastasis of the lung cancer in rats and decreased lung metastasis of Lewis lung carcinoma in mice, c) reduced lung cancer cell proliferation and cell cycle progression in vitro, d) decreased growth of the tumors from hypoxia-pretreated A549 cells, e) decreased Na+-K+ ATPase α1 expression in hypoxic lung cancer tumors, and f) increased expression of hypoxia inducible factors (HIF1α and HIF2α) but decreased microvessel density in the lung cancer tumors. In contrast to lung cancer, the growth of tumor from HCT116 human colon cancer cells (colon cancer tumor) was a) significantly enhanced in the same hypoxia conditions, accompanied by b) no significant change in expression of Na+-K+ ATPase α1, c) increased HIF1α expression (no HIF2α was detected) and d) increased microvessel density in the tumor tissues. Conclusions This study demonstrated that long-term exposure to hypoxia repressed tumor progression of the lung cancer from A549 cells and that decreased expression of Na+-K+ ATPase was involved in hypoxic inhibition of tumor progression. The results from this study provide new insights into the role of hypoxia in tumor progression and therapeutic strategies for cancer treatment.
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Affiliation(s)
- Lunyin Yu
- Pulmonary and Critical Care Unit, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.
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11
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Roussos ET, Wang Y, Wyckoff JB, Sellers RS, Wang W, Li J, Pollard JW, Gertler FB, Condeelis JS. Mena deficiency delays tumor progression and decreases metastasis in polyoma middle-T transgenic mouse mammary tumors. Breast Cancer Res 2010; 12:R101. [PMID: 21108830 PMCID: PMC3046446 DOI: 10.1186/bcr2784] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2010] [Revised: 11/03/2010] [Accepted: 11/25/2010] [Indexed: 01/19/2023] Open
Abstract
Introduction The actin binding protein Mammalian enabled (Mena), has been implicated in the metastatic progression of solid tumors in humans. Mena expression level in primary tumors is correlated with metastasis in breast, cervical, colorectal and pancreatic cancers. Cells expressing high Mena levels are part of the tumor microenvironment for metastasis (TMEM), an anatomical structure that is predictive for risk of breast cancer metastasis. Previously we have shown that forced expression of Mena adenocarcinoma cells enhances invasion and metastasis in xenograft mice. Whether Mena is required for tumor progression is still unknown. Here we report the effects of Mena deficiency on tumor progression, metastasis and on normal mammary gland development. Methods To investigate the role of Mena in tumor progression and metastasis, Mena deficient mice were intercrossed with mice carrying a transgene expressing the polyoma middle T oncoprotein, driven by the mouse mammary tumor virus. The progeny were investigated for the effects of Mena deficiency on tumor progression via staging of primary mammary tumors and by evaluation of morbidity. Stages of metastatic progression were investigated using an in vivo invasion assay, intravital multiphoton microscopy, circulating tumor cell burden, and lung metastases. Mammary gland development was studied in whole mount mammary glands of wild type and Mena deficient mice. Results Mena deficiency decreased morbidity and metastatic dissemination. Loss of Mena increased mammary tumor latency but had no affect on mammary tumor burden or histologic progression to carcinoma. Elimination of Mena also significantly decreased epidermal growth factor (EGF) induced in vivo invasion, in vivo motility, intravasation and metastasis. Non-tumor bearing mice deficient for Mena also showed defects in mammary gland terminal end bud formation and branching. Conclusions Deficiency of Mena decreases metastasis by slowing tumor progression and reducing tumor cell invasion and intravasation. Mena deficiency during development causes defects in invasive processes involved in mammary gland development. These findings suggest that functional intervention targeting Mena in breast cancer patients may provide a valuable treatment option to delay tumor progression and decrease invasion and metastatic spread leading to an improved prognostic outcome.
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Affiliation(s)
- Evanthia T Roussos
- Department of Anatomy and Structural Biology, Albert Einstein College of Medicine, Bronx, NY 10461, USA.
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Rofstad EK, Gaustad JV, Egeland TAM, Mathiesen B, Galappathi K. Tumors exposed to acute cyclic hypoxic stress show enhanced angiogenesis, perfusion and metastatic dissemination. Int J Cancer 2010; 127:1535-46. [PMID: 20091868 DOI: 10.1002/ijc.25176] [Citation(s) in RCA: 133] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Clinical studies have shown that patients with highly hypoxic primary tumors may have poor disease-free and overall survival rates. Studies of experimental tumors have revealed that acutely hypoxic cells may be more metastatic than normoxic or chronically hypoxic cells. In the present work, causal relations between acute cyclic hypoxia and metastasis were studied by periodically exposing BALB/c nu/nu mice bearing A-07 human melanoma xenografts to a low oxygen atmosphere. The hypoxia treatment consisted of 12 cycles of 10 min of 8% O(2) in N(2) followed by 10 min of air for a total of 4 hr, began on the first day after tumor cell inoculation and was given daily until the tumors reached a volume of 100 mm(3). Twenty-four hours after the last hypoxia exposure, the primary tumors were subjected to dynamic contrast-enhanced magnetic resonance imaging for assessment of blood perfusion before being resected and processed for immunohistochemical examinations of microvascular density and expression of proangiogenic factors. Mice exposed to acute cyclic hypoxia showed increased incidence of pulmonary metastases, and the primary tumors of these mice showed increased blood perfusion, microvascular density and vascular endothelial growth factor-A (VEGF-A) expression; whereas, the expression of interleukin-8, platelet-derived endothelial cell growth factor and basic fibroblast growth factor was unchanged. The increased pulmonary metastasis was most likely a consequence of hypoxia-induced VEGF-A upregulation, which resulted in increased angiogenic activity and blood perfusion in the primary tumor and thus facilitated tumor cell intravasation and hematogenous transport into the general circulation.
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Affiliation(s)
- Einar K Rofstad
- Group of Radiation Biology and Tumor Physiology, Department of Radiation Biology, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway.
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Abstract
This Failla Lecture focused on the inter-relationships between tumor angiogenesis, HIF-1 expression and radiotherapy responses. A common thread that bonds all of these factors together is microenvironmental stress caused by reactive oxygen and nitrogen species formed during tumor growth and angiogenesis or in response to cytotoxic treatment. In this review we focus on one aspect of the crossroad between oxidative stress and angiogenesis, namely cycling hypoxia. Understanding of the relative importance of this feature of the tumor microenvironment has recently expanded; it influences tumor biology in ways that are separate from chronic hypoxia. Cycling hypoxia can influence angiogenesis, treatment responses and metastatic behavior. It represents an important and relatively less well understood feature of tumor biology that requires additional research.
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Affiliation(s)
- Mark W Dewhirst
- Radiation Oncology Department, Duke University Medical Center, Durham, Durham, NC 27710, USA.
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Progression and metastasis in a transgenic mouse breast cancer model: effects of exposure to in vivo hypoxia. Cancer Lett 2009; 282:98-108. [PMID: 19356843 DOI: 10.1016/j.canlet.2009.03.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2008] [Revised: 02/27/2009] [Accepted: 03/02/2009] [Indexed: 11/21/2022]
Abstract
Hypoxia is a predictor of poor patient survival in several cancers, including breast carcinomas. One possible mechanism is genomic instability induced by oxic stress. In this study we examined this possible mechanism by exposing an in vivo breast cancer model to hypoxia/reoxygenation. MMTV-Neu transgenic mice were exposed to cycling acute (AH) or chronic hypoxia (CH) before (early) or after (late) tumour detection to study effects of hypoxia on tumour initiation and progression, respectively. We observed no effect of the hypoxic exposures on times to first tumour detection, but we saw a trend of early AH-exposed mice to develop more tumours and macrometastases than CH-exposed mice. Unexpectedly, but consistent with these findings, we observed significantly reduced 8-oxo-dG lesions levels in the mammary tissue with the greatest difference observed between the air control (AC) and AH-exposed groups. In the late gassing group, there was a similar trend for reduced 8-oxo-dG lesion levels, but interestingly mice that developed macroscopic lung metastases demonstrated significantly increased levels of 8-oxo-dG lesions in their tumours relative to those that did not, irrespective of the gassing exposure. A trend for increased macrophage content was observed in tumours from mice exposed to acute hypoxia. Our results indicate that oxic stress induced by hypoxia/reoxygenation is unlikely to be a major factor driving tumour progression of established MMTV-Neu tumours but suggest that acute and chronic hypoxia may affect tumour incidence and metastasis when applied prior to tumour development.
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