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Hypoxia in Skin Cancer: Molecular Basis and Clinical Implications. Int J Mol Sci 2023; 24:ijms24054430. [PMID: 36901857 PMCID: PMC10003002 DOI: 10.3390/ijms24054430] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 02/16/2023] [Accepted: 02/21/2023] [Indexed: 02/25/2023] Open
Abstract
Skin cancer is one of the most prevalent cancers in the Caucasian population. In the United States, it is estimated that at least one in five people will develop skin cancer in their lifetime, leading to significant morbidity and a healthcare burden. Skin cancer mainly arises from cells in the epidermal layer of the skin, where oxygen is scarce. There are three main types of skin cancer: malignant melanoma, basal cell carcinoma, and squamous cell carcinoma. Accumulating evidence has revealed a critical role for hypoxia in the development and progression of these dermatologic malignancies. In this review, we discuss the role of hypoxia in treating and reconstructing skin cancers. We will summarize the molecular basis of hypoxia signaling pathways in relation to the major genetic variations of skin cancer.
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Danielpour D, Corum S, Welford SM, Shankar E. Hypoxia represses early responses of prostate and renal cancer cells to YM155 independent of HIF-1α and HIF-2α. CURRENT RESEARCH IN PHARMACOLOGY AND DRUG DISCOVERY 2021; 3:100076. [PMID: 35005610 PMCID: PMC8717246 DOI: 10.1016/j.crphar.2021.100076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/06/2021] [Accepted: 12/14/2021] [Indexed: 01/16/2023] Open
Abstract
The imidazolium compound Sepantronium Bromide (YM155) successfully promotes tumor regression in various pre-clinical models but has shown modest responses in human clinical trials. We provide evidence to support that the hypoxic milieu of tumors may limit the clinical usefulness of YM155. Hypoxia (1% O2) strongly (>16-fold) represses the cytotoxic activity of YM155 on prostate and renal cancer cells in vitro. Hypoxia also represses all early signaling responses associated with YM155, including activation of AMPK and retinoblastoma protein (Rb), inactivation of the mechanistic target of rapamycin complex 1 (mTORC1), inhibition of phospho-ribosomal protein S6 (rS6), and suppression of the expression of Cyclin Ds, Mcl-1 and Survivin. Cells pre-incubated with hypoxia for 24 h are desensitized to YM155 even when they are treated with YM155 under atmospheric oxygen conditions, supporting that cells at least temporarily retain hypoxia-induced resistance to YM155. We tested the role of hypoxia-inducible factor (HIF)-1α and HIF-2α in the hypoxia-induced resistance to YM155 by comparing responses of YM155 in VHL-proficient versus VHL-deficient RCC4 and 786-O renal cancer cells and silencing HIF expression in PC-3 prostate cancer cells. Those studies suggested that hypoxia-induced resistance to YM155 occurs independent of HIF-1α and HIF-2α. Moreover, the hypoxia mimetics deferoxamine and dimethyloxalylglycine, which robustly induce HIF-1α levels in PC-3 cells under atmospheric oxygen, did not diminish their early cellular responses to YM155. Collectively, our data support that hypoxia induces resistance of cells to YM155 through a HIF-1α and HIF-2α-independent mechanism. We hypothesize that a hypothetical hypoxia-inducer factor (HIF-X) represses early signaling responses to YM155.
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Affiliation(s)
- David Danielpour
- Case Comprehensive Cancer Center Research Laboratories, The Division of General Medical Sciences-Oncology, Case Western Reserve University, Cleveland, OH, 44106, USA
- Department of Pharmacology, Case Western Reserve University, Cleveland, OH, 44106, USA
- Department of Urology, University Hospitals of Cleveland, Cleveland, OH, 44106, USA
| | - Sarah Corum
- Case Comprehensive Cancer Center Research Laboratories, The Division of General Medical Sciences-Oncology, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Scott M. Welford
- Department of Radiation Oncology, Case Western Reserve University, Cleveland, OH, 44106, USA
- Department of Radiation Oncology, University of Miami, FL, 33136, USA
| | - Eswar Shankar
- Case Comprehensive Cancer Center Research Laboratories, The Division of General Medical Sciences-Oncology, Case Western Reserve University, Cleveland, OH, 44106, USA
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Pacella G, Capell BC. Epigenetic and metabolic interplay in cutaneous squamous cell carcinoma. Exp Dermatol 2021; 30:1115-1125. [PMID: 33844325 PMCID: PMC8324523 DOI: 10.1111/exd.14354] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 03/16/2021] [Accepted: 04/06/2021] [Indexed: 12/14/2022]
Abstract
With the ageing of the population and increased levels of recreational sun exposure and immunosuppression, cutaneous squamous cell carcinoma (cSCC), is both an enormous and expanding clinical and economic issue. Despite advances in therapy, up to 5000-8000 people are estimated to die every year from cSCC in the U.S., highlighting the need for both better prevention and treatments. Two emerging areas of scientific discovery that may offer new therapeutic approaches for cSCC are epigenetics and metabolism. Importantly, these disciplines display extensive crosstalk, with metabolic inputs contributing to the chromatin landscape, while the dynamic epigenome shapes transcriptional and cellular responses that feedback into cellular metabolism. Recent evidence suggests that indeed, epigenetic and metabolic dysregulation may be critical contributors to cSCC pathogenesis. Here, we synthesize the latest findings from these fast-moving fields, including how they may drive cSCC, yet also be harnessed for therapy.
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Affiliation(s)
- Gina Pacella
- Department of Dermatology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
- Department of Genetics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Brian C. Capell
- Department of Dermatology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
- Department of Genetics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
- Penn Epigenetics Institute, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
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Human skin equivalents cultured under hypoxia display enhanced epidermal morphogenesis and lipid barrier formation. Sci Rep 2019; 9:7811. [PMID: 31127151 PMCID: PMC6534609 DOI: 10.1038/s41598-019-44204-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 05/02/2019] [Indexed: 12/17/2022] Open
Abstract
Human skin equivalents (HSEs) are three-dimensional cell models mimicking characteristics of native human skin (NHS) in many aspects. However, a limitation of HSEs is the altered in vitro morphogenesis and barrier formation. Differences between in vitro and in vivo skin could have been induced by suboptimal cell culture conditions, of which the level of oxygen in vitro (20%) is much higher than in vivo (0.5-8%). Our aim is to study how external oxygen levels affect epidermal morphogenesis and barrier formation in HSEs. In the present study, fibroblast and keratinocyte monocultures, and HSEs were generated under 20% (normoxia) and 3% (hypoxia) oxygen level. In all cultures under hypoxia, expression of hypoxia-inducible factor target genes was increased. Characterization of HSEs generated under hypoxia using immunohistochemical analyses of morphogenesis biomarkers revealed a reduction in epidermal thickness, reduced proliferation, similar early differentiation, and an attenuated terminal differentiation program compared to normoxia, better mimicking NHS. The stratum corneum ceramide composition was studied with liquid chromatography coupled to mass spectrometry. Under hypoxia, HSEs exhibited a ceramide composition that more closely resembles that of NHS. Consequently, the lipid organization was improved. In conclusion, epidermal morphogenesis and barrier formation in HSEs reconstructed under hypoxia better mimics that of NHS.
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Gkogkolou P, Sarna M, Sarna T, Paus R, Luger T, Böhm M. Protection of glucotoxicity by a tripeptide derivative of α‐melanocyte‐stimulating hormone in human epidermal keratinocytes. Br J Dermatol 2018; 180:836-848. [DOI: 10.1111/bjd.17125] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/21/2018] [Indexed: 12/21/2022]
Affiliation(s)
- P. Gkogkolou
- Department of Dermatology Laboratory for Neuroendocrinology of the Skin and Interdisciplinary Endocrinology University of Münster Von Esmarch‐Str. 58 48149 Münster Germany
| | - M. Sarna
- Department of Biophysics Faculty of Biochemistry, Biophysics and Biotechnology Jagiellonian University Cracow Poland
- Laboratory of Imaging and Atomic Force Spectroscopy Malopolska Centre of Biotechnology Jagiellonian University Cracow Poland
| | - T. Sarna
- Department of Biophysics Faculty of Biochemistry, Biophysics and Biotechnology Jagiellonian University Cracow Poland
- Laboratory of Imaging and Atomic Force Spectroscopy Malopolska Centre of Biotechnology Jagiellonian University Cracow Poland
| | - R. Paus
- Department of Dermatology Laboratory for Neuroendocrinology of the Skin and Interdisciplinary Endocrinology University of Münster Von Esmarch‐Str. 58 48149 Münster Germany
- Centre for Dermatology Research Institute of Inflammation and Repair University of Manchester Manchester U.K
| | - T.A. Luger
- Department of Dermatology Laboratory for Neuroendocrinology of the Skin and Interdisciplinary Endocrinology University of Münster Von Esmarch‐Str. 58 48149 Münster Germany
| | - M. Böhm
- Department of Dermatology Laboratory for Neuroendocrinology of the Skin and Interdisciplinary Endocrinology University of Münster Von Esmarch‐Str. 58 48149 Münster Germany
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Sala MA, Chen C, Zhang Q, Do-Umehara HC, Wu W, Misharin AV, Waypa GB, Fang D, Budinger GRS, Liu S, Chandel NS, Schumacker PT, Sznajder JI, Liu J. JNK2 up-regulates hypoxia-inducible factors and contributes to hypoxia-induced erythropoiesis and pulmonary hypertension. J Biol Chem 2017; 293:271-284. [PMID: 29118187 DOI: 10.1074/jbc.ra117.000440] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 11/07/2017] [Indexed: 11/06/2022] Open
Abstract
The hypoxic response is a stress response triggered by low oxygen tension. Hypoxia-inducible factors (HIFs) play a prominent role in the pathobiology of hypoxia-associated conditions, including pulmonary hypertension (PH) and polycythemia. The c-Jun N-terminal protein kinase (JNK), a stress-activated protein kinase that consists of two ubiquitously expressed isoforms, JNK1 and JNK2, and a tissue-specific isoform, JNK3, has been shown to be activated by hypoxia. However, the physiological role of JNK1 and JNK2 in the hypoxic response remains elusive. Here, using genetic knockout cells and/or mice, we show that JNK2, but not JNK1, up-regulates the expression of HIF-1α and HIF-2α and contributes to hypoxia-induced PH and polycythemia. Knockout or silencing of JNK2, but not JNK1, prevented the accumulation of HIF-1α in hypoxia-treated cells. Loss of JNK2 resulted in a decrease in HIF-1α and HIF-2α mRNA levels under resting conditions and in response to hypoxia. Consequently, hypoxia-treated Jnk2-/- mice had reduced erythropoiesis and were less prone to polycythemia because of decreased expression of the HIF target gene erythropoietin (Epo). Jnk2-/- mice were also protected from hypoxia-induced PH, as indicated by lower right ventricular systolic pressure, a process that depends on HIF. Taken together, our results suggest that JNK2 is a positive regulator of HIFs and therefore may contribute to HIF-dependent pathologies.
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Affiliation(s)
- Marc A Sala
- Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois 60611
| | - Cong Chen
- Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois 60611
| | - Qiao Zhang
- Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois 60611; School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Hanh Chi Do-Umehara
- Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois 60611
| | - Wenjiao Wu
- Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois 60611; School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Alexander V Misharin
- Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois 60611
| | - Gregory B Waypa
- Department of Pediatrics, Northwestern University, Chicago, Illinois 60611
| | - Deyu Fang
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611
| | - G R Scott Budinger
- Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois 60611
| | - Shuwen Liu
- School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Navdeep S Chandel
- Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois 60611
| | - Paul T Schumacker
- Department of Pediatrics, Northwestern University, Chicago, Illinois 60611
| | - Jacob I Sznajder
- Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois 60611
| | - Jing Liu
- Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois 60611.
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Tang D, Yan T, Zhang J, Jiang X, Zhang D, Huang Y. Notch1 Signaling Contributes to Hypoxia-induced High Expression of Integrin β1 in Keratinocyte Migration. Sci Rep 2017; 7:43926. [PMID: 28266574 PMCID: PMC5339698 DOI: 10.1038/srep43926] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 02/01/2017] [Indexed: 02/04/2023] Open
Abstract
Oxygen tension is an important micro-environmental factor that affects epidermal development and function. After injury, high oxygen consumption and vascular injury result in partial hypoxia. However, whether hypoxia benefits or hurts wound healing remains controversial. In this study, a tissue oxygen tension monitor was used to detect the spatial and temporal distribution of oxygen in burn wounds. In vitro, we demonstrate that hypoxia promoted the expression of integrin β1 and the migration of keratinocytes. Furthermore, hypoxia-induced migration was slowed by Notch1 ligands and a siRNA against ITGB1 (integrin β1). Our findings suggest that integrin β1 may be an oxygen-sensitive molecule that promotes keratinocyte migration during wound healing and that Notch1 signaling is involved in this process.
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Affiliation(s)
- Di Tang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, The Third Military Medical University, Chongqing, China
| | - Tiantian Yan
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, The Third Military Medical University, Chongqing, China
| | - Junhui Zhang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, The Third Military Medical University, Chongqing, China
| | - Xupin Jiang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, The Third Military Medical University, Chongqing, China
| | - Dongxia Zhang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, The Third Military Medical University, Chongqing, China
| | - Yuesheng Huang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, The Third Military Medical University, Chongqing, China
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