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Kurtulmuş N, Tokat F, Düren M, Kaya H, Ertaş B, İnce Ü. Expression of vascular endothelial growth factor in follicular cell-derived lesions of the thyroid: Is NIFTP benign or precancerous? Turk J Surg 2022; 38:60-66. [DOI: 10.47717/turkjsurg.2022.5318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 11/08/2021] [Indexed: 11/23/2022]
Abstract
Objective: Vascular endothelial growth factor (VEGF) is an angiogenic factor that plays an important role in physiological and pathological angiogenesis of the thyroid. The aim of the current study was to determine the expression characteristics of VEGF in follicular cell-derived lesions of the thyroid and to assess whether a new entity noninvasive follicular thyroid neoplasm with papillary-like nuclear features (NIFTP) is precancerous.
Material and Methods: Patients diagnosed with 33 follicular adenomas (FA), 41 invasive follicular variant papillary thyroid cancer (IN-FVPTC), and 40 NIFTP in surgical resection materials were evaluated retrospectively. Immunostaining was performed on 5-μm paraffin tissue sections. The percentages of immunostaing for VEGF were evaluated on pathological materials. We used a percentage of labeled thyrocytes score (0, no labeling; 1, <30%; 2, 31-60%; 3, >60%) and an intensity score (0, no staining; 1, weak; 2, intermediate; 3, strong). The sum of two scores were accepted as the total score.
Results: Mean ages of the FA, IN-FVPTC, and NIFTP groups were 44.7 ± 11.7 years, 46.9 ± 13.6 years, 43.2 ± 15.4 years, respectively and the mean VEGF immunostaining scores were 44.7 ± 29.3, 50.2 ± 32.54, 4 ± 26.3 respectively. Although there was no statistically significant difference (p= 0.347), the total score of the NIFTPs was higher than the scores of the FA (mean= 3.9 ± 1.8) and IN-FVPTC(mean= 4.3 ± 1.9) groups with a mean value of 4.6 ± 1.7. This result was remarkable. There was no statistically significant difference between tumor diameters and staining percentages (p= 0.750).
Conclusion: Even if there were no statistical differences for VEGF immunostaining, it was high in NIFTPs. Since we know the role of VEGF in tumorigenesis, we can hypothesize that NIPTP can be precancerous. Our argue should be corroborated by a large prospective study.
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Rodak O, Peris-Díaz MD, Olbromski M, Podhorska-Okołów M, Dzięgiel P. Current Landscape of Non-Small Cell Lung Cancer: Epidemiology, Histological Classification, Targeted Therapies, and Immunotherapy. Cancers (Basel) 2021; 13:4705. [PMID: 34572931 PMCID: PMC8470525 DOI: 10.3390/cancers13184705] [Citation(s) in RCA: 83] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 09/13/2021] [Accepted: 09/16/2021] [Indexed: 02/07/2023] Open
Abstract
Non-small cell lung cancer (NSCLC) is a subtype of the most frequently diagnosed cancer in the world. Its epidemiology depends not only on tobacco exposition but also air quality. While the global trends in NSCLC incidence have started to decline, we can observe region-dependent differences related to the education and the economic level of the patients. Due to an increasing understanding of NSCLC biology, new diagnostic and therapeutic strategies have been developed, such as the reorganization of histopathological classification or tumor genotyping. Precision medicine is focused on the recognition of a genetic mutation in lung cancer cells called "driver mutation" to provide a variety of specific inhibitors of improperly functioning proteins. A rapidly growing group of approved drugs for targeted therapy in NSCLC currently allows the following mutated proteins to be treated: EGFR family (ERBB-1, ERBB-2), ALK, ROS1, MET, RET, NTRK, and RAF. Nevertheless, one of the most frequent NSCLC molecular sub-types remains without successful treatment: the K-Ras protein. In this review, we discuss the current NSCLC landscape treatment focusing on targeted therapy and immunotherapy, including first- and second-line monotherapies, immune checkpoint inhibitors with chemotherapy treatment, and approved predictive biomarkers.
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Affiliation(s)
- Olga Rodak
- Department of Histology and Embryology, Department of Human Morphology and Embryology, Wroclaw Medical University, 50-368 Wroclaw, Poland; (M.O.); (P.D.)
| | - Manuel David Peris-Díaz
- Department of Chemical Biology, Faculty of Biotechnology, University of Wroclaw, F. Joliot-Curie 14a, 50-383 Wroclaw, Poland;
| | - Mateusz Olbromski
- Department of Histology and Embryology, Department of Human Morphology and Embryology, Wroclaw Medical University, 50-368 Wroclaw, Poland; (M.O.); (P.D.)
| | - Marzenna Podhorska-Okołów
- Department of Ultrastructural Research, Department of Human Morphology and Embryology, Wroclaw Medical University, 50-368 Wroclaw, Poland;
| | - Piotr Dzięgiel
- Department of Histology and Embryology, Department of Human Morphology and Embryology, Wroclaw Medical University, 50-368 Wroclaw, Poland; (M.O.); (P.D.)
- Department of Physiotherapy, University School of Physical Education, 51-612 Wroclaw, Poland
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Angiogenesis inhibition in non-small cell lung cancer: a critical appraisal, basic concepts and updates from American Society for Clinical Oncology 2019. Curr Opin Oncol 2020; 32:44-53. [PMID: 31609741 DOI: 10.1097/cco.0000000000000591] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
PURPOSE OF REVIEW Recently, the combination of antiangiogenic agents, chemotherapy and immunotherapy has shown synergistic anticancer effects in non-small cell lung cancer (NSCLC). The future for this approach appears bright in lung cancer treatment; however, many challenges remain to be overcome regarding its true potential, optimal sequence and timing of therapy, and safety profile. In this review, we will discuss the current status and future direction of antiangiogenic therapy for the treatment of NSCLC, and highlight emerging strategies, such as tumor vessel normalization (TVN). RECENT FINDINGS Bevacizumab was the first antiangiogenic agent approved for the treatment of advanced NSCLC. Recently, the combination of chemotherapy/antiangiogenic therapy with immunotherapy showed high efficacy in first-line settings. A subgroup of patients with liver metastasis and driver mutation-addicted tumors benefited most, suggesting that the metastatic location, as well as the genetic background of the tumor, are key determinants for therapy responses. SUMMARY The efficacy of antiangiogenic therapies in unselected patients is rather limited. The tumor microenvironment has appeared to be more complex and heterogeneous than previously assumed. Only a contextual rather than a cell-specific approach might provide valuable insights towards the clinical validation of combinational therapies.
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Comunanza V, Bussolino F. Therapy for Cancer: Strategy of Combining Anti-Angiogenic and Target Therapies. Front Cell Dev Biol 2017; 5:101. [PMID: 29270405 PMCID: PMC5725406 DOI: 10.3389/fcell.2017.00101] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 11/15/2017] [Indexed: 12/12/2022] Open
Abstract
The concept that blood supply is required and necessary for cancer growth and spreading is intuitive and was firstly formalized by Judah Folkman in 1971, when he demonstrated that cancer cells release molecules able to promote the proliferation of endothelial cells and the formation of new vessels. This seminal result has initiated one of the most fascinating story of the medicine, which is offering a window of opportunity for cancer treatment based on the use of molecules inhibiting tumor angiogenesis and in particular vascular-endothelial growth factor (VEGF), which is the master gene in vasculature formation and is the commonest target of anti-angiogenic regimens. However, the clinical results are far from the remarkable successes obtained in pre-clinical models. The reasons of this discrepancy have been partially understood and well addressed in many reviews (Bergers and Hanahan, 2008; Bottsford-Miller et al., 2012; El-Kenawi and El-Remessy, 2013; Wang et al., 2015; Jayson et al., 2016). At present anti-angiogenic regimens are not used as single treatments but associated with standard chemotherapies. Based on emerging knowledge of the biology of VEGF, here we sustain the hypothesis of the efficacy of a dual approach based on targeting pro-angiogenic pathways and other druggable targets such as mutated oncogenes or the immune system.
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Affiliation(s)
- Valentina Comunanza
- Department of Oncology, University of Torino, Candiolo, Italy.,Candiolo Cancer Institute FPO-IRCCS, Candiolo, Italy
| | - Federico Bussolino
- Department of Oncology, University of Torino, Candiolo, Italy.,Candiolo Cancer Institute FPO-IRCCS, Candiolo, Italy
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Demierre MF, Sondak VK. Chemoprevention of Melanoma: Theoretical and Practical Considerations. Cancer Control 2017; 12:219-22. [PMID: 16258492 DOI: 10.1177/107327480501200402] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Chemoprevention refers to the use of agents to reverse, suppress, or prevent carcinogenic progression of cancer. The use of chemoprevention is an unexplored strategy in melanoma prevention. METHODS A retrospective review of the literature was undertaken regarding the important elements in evaluating chemoprevention as a strategy in melanoma. RESULTS Several considerations need to be addressed before a chemoprevention agent can be moved to a large randomized trial. Statins have both experimental and epidemiologic evidence to support their further development as candidate chemopreventive agents, but the evidence is insufficient to justify large-scale phase III studies. A strong scientific rationale, a systematic approach to chemoprevention agent development with rigorous chemoprevention designs, and careful selection of surrogate endpoint biomarkers are critical issues in developing a chemoprevention strategy. CONCLUSIONS Addressing these relevant considerations will allow for the development of chemoprevention in melanoma.
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Affiliation(s)
- Marie F Demierre
- Department of Dermatology, Boston University School of Medicine, MA 02118, USA.
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Al-Ghorbani M, Pavankumar GS, Naveen P, Thirusangu P, Prabhakar BT, Khanum SA. Synthesis and an angiolytic role of novel piperazine-benzothiazole analogues on neovascularization, a chief tumoral parameter in neoplastic development. Bioorg Chem 2016; 65:110-7. [PMID: 26918263 DOI: 10.1016/j.bioorg.2016.02.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 02/18/2016] [Accepted: 02/19/2016] [Indexed: 11/17/2022]
Abstract
A novel series of benzoic acid N'-[2-(4-benzothiazol-2-yl-piperazin-1-yl)-acetyl]-hydrazides 6a-j were synthesized and characterized by IR, (1)H, (13)C NMR, elemental and mass spectral analyses. The in-vitro cytotoxicity and cell viability assay of the synthesized compounds 6a-j were evaluated against Dalton's lymphoma ascites (DLA) cells. Our results showed that compound 6c with a bromo group on phenyl ring has showed promising antiproliferative efficacy. Further investigation of compound 6c on in-vivo treatment model depicts the increased tumor suppression through inhibition of angiogenesis.
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Affiliation(s)
- Mohammed Al-Ghorbani
- Department of Chemistry, Yuvaraja's College, University of Mysore, Karnataka, India
| | - G S Pavankumar
- Molecular Biomedicine Laboratory, Postgraduate Department of Studies and Research in Biotechnology, Sahyadri Science College (Autonomous), Kuvempu University, Karnataka, India
| | - P Naveen
- Department of Chemistry, Yuvaraja's College, University of Mysore, Karnataka, India
| | - Prabhu Thirusangu
- Molecular Biomedicine Laboratory, Postgraduate Department of Studies and Research in Biotechnology, Sahyadri Science College (Autonomous), Kuvempu University, Karnataka, India
| | - B T Prabhakar
- Molecular Biomedicine Laboratory, Postgraduate Department of Studies and Research in Biotechnology, Sahyadri Science College (Autonomous), Kuvempu University, Karnataka, India
| | - Shaukath Ara Khanum
- Department of Chemistry, Yuvaraja's College, University of Mysore, Karnataka, India.
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Pastushenko I, Vermeulen PB, Van den Eynden GG, Rutten A, Carapeto FJ, Dirix LY, Van Laere S. Mechanisms of tumour vascularization in cutaneous malignant melanoma: clinical implications. Br J Dermatol 2014; 171:220-33. [PMID: 24641095 DOI: 10.1111/bjd.12973] [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] [Accepted: 03/11/2014] [Indexed: 01/02/2023]
Abstract
Malignant melanoma represents < 10% of all skin cancers but is responsible for the majority of skin-cancer-related deaths. Metastatic melanoma has historically been considered as one of the most therapeutically challenging malignancies. Fortunately, for the first time after decades of basic research and clinical investigation, new drugs have produced major clinical responses. Angiogenesis has been considered an important target for cancer treatment. Initial efforts have focused primarily on targeting endothelial and tumour-related vascular endothelial growth factor signalling. Here, we review different mechanisms of tumour vascularization described in melanoma and discuss the potential clinical implications.
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Affiliation(s)
- I Pastushenko
- Department of Dermatology, Hospital Clínico Universitario 'Lozano Blesa', Zaragoza, 50009, Spain
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Lee YM, Lee SH, Lee KB, Nguyen MP, Lee MY, Park GH, Kwon MJ. Silencing of reversion-inducing cysteine-rich protein with Kazal motifs stimulates hyperplastic phenotypes through activation of epidermal growth factor receptor and hypoxia-inducible factor-2α. PLoS One 2013; 8:e84520. [PMID: 24376819 PMCID: PMC3869844 DOI: 10.1371/journal.pone.0084520] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Accepted: 11/14/2013] [Indexed: 01/16/2023] Open
Abstract
Reversion-inducing cysteine-rich protein with Kazal motifs (RECK, a tumor suppressor) is down-regulated by the oncogenic signals and hypoxia, but the biological function of RECK in early tumorigenic hyperplastic phenotypes is largely unknown. Knockdown of RECK by small interfering RNA (siRECK) or hypoxia significantly promoted cell proliferation in various normal epithelial cells. Hypoxia as well as knockdown of RECK by siRNA increased the cell cycle progression, the levels of cyclin D1 and c-Myc, and the phosphorylation of Rb protein (p-pRb), but decreased the expression of p21cip1, p27kip1, and p16ink4A. HIF-2α was upregulated by knockdown of RECK, indicating HIF-2α is a downstream target of RECK. As knockdown of RECK induced the activation of epidermal growth factor receptor (EGFR) and treatment of an EGFR kinase inhibitor, gefitinib, suppressed HIF-2α expression induced by the silencing of RECK, we can suggest that the RECK silenicng-EGFR-HIF-2α axis might be a key molecular mechanism to induce hyperplastic phenotype of epithelial cells. It was also found that shRNA of RECK induced larger and more numerous colonies than control cells in an anchorage-independent colony formation assay. Using a xenograft assay, epithelial cells with stably transfected with shRNA of RECK formed a solid mass earlier and larger than those with control cells in nude mice. In conclusion, the suppression of RECK may promote the development of early tumorigenic hyperplastic characteristics in hypoxic stress.
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Affiliation(s)
- You Mie Lee
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Kyungpook National University, Daegu, Republic of Korea
- School of Life Sciences and Biotechnology, Kyungpook National University, Daegu, Republic of Korea
- * E-mail:
| | - Sun-Hee Lee
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Kyungpook National University, Daegu, Republic of Korea
- School of Life Sciences and Biotechnology, Kyungpook National University, Daegu, Republic of Korea
| | - Kheun Byeol Lee
- School of Life Sciences and Biotechnology, Kyungpook National University, Daegu, Republic of Korea
| | - Minh Phuong Nguyen
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Kyungpook National University, Daegu, Republic of Korea
- School of Life Sciences and Biotechnology, Kyungpook National University, Daegu, Republic of Korea
| | - Min-Young Lee
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Kyungpook National University, Daegu, Republic of Korea
| | - Gyu Hwan Park
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Kyungpook National University, Daegu, Republic of Korea
| | - Mi Jeong Kwon
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Kyungpook National University, Daegu, Republic of Korea
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Liu X, Fu YM, Meadows GG. Differential effects of specific amino acid restriction on glucose metabolism, reduction/oxidation status and mitochondrial damage in DU145 and PC3 prostate cancer cells. Oncol Lett 2011; 2:349-355. [PMID: 21415930 DOI: 10.3892/ol.2011.237] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Selective amino acid restriction targets mitochondria to induce apoptosis of DU145 and PC3 prostate cancer cells. Biochemical assays and flow cytometry were uitilized to analyze the glucose consumption, lactate production, pyruvate dehydrogenase (PDH), nicotinamide adenine dinucleotide (NAD)/NADH and nicotinamide adenine dinucleotide phosphate (NADP)/NADPH ratios, mitochondrial glutathione peroxidase (GPx), manganese superoxide dismutase (SOD), glutathione, reactive oxygen species (ROS) and DNA damage in DU145 and PC prostate cancer cells cultured under various amino acid deprived conditions. Restriction of tyrosine and phenylalanine (Tyr/Phe), glutamine (Gln) or methionine (Met) differentially modulated glucose metabolism and PDH and antioxidant enzyme activity in the mitochondria of the two prostate cancer cell lines. In DU145 cells, Gln and Met restriction increased glucose consumption and decreased lactate production, but Tyr/Phe restriction did not. The examined restrictions increased mitochondrial PDH activity and accumulation of ROS. Gln and Met restriction increased GPx activity. Tyr/Phe and Met restriction increased SOD during the first 2 days of the restriction, and the activity returned to the basal level on day 4. All amino acid restrictions decreased reduced glutathione (GSH) and induced mitochondrial DNA damage. In PC3 cells, all amino acid restrictions reduced glucose consumption and lactate production. Gln restriction increased ROS and elevated GPx activity. Tyr/Phe restriction increased SOD activity. The amino acid restriction decreased GSH, but did not cause mitochondrial DNA damage. Specific amino acid dependency differentially regulates glucose metabolism, oxidation-reduction reactions of mitochondria and mitochondrial damage in DU145 and PC3 prostate cancer cell lines.
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Affiliation(s)
- Xiaoyi Liu
- Department of Pharmaceutical Sciences, College of Pharmacy, Washington State University, Pullman, WA 99164-6534, USA
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Wang L, Lau JS, Patra CR, Cao Y, Bhattacharya S, Dutta S, Nandy D, Wang E, Rupasinghe CN, Vohra P, Spaller MR, Mukhopadhyay D. RGS-GAIP-interacting protein controls breast cancer progression. Mol Cancer Res 2010; 8:1591-600. [PMID: 21047775 DOI: 10.1158/1541-7786.mcr-10-0209] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Although the importance of RGS-GAIP-interacting protein (GIPC) in the biology of malignant cells is well known, the molecular mechanism of GIPC in the inhibition of tumor progression has not been identified. This study focused on elucidating the molecular role of GIPC in breast cancer progression. By using a human breast tumor specimen, an in vivo mouse model, and breast cancer cell lines, we showed for the first time that GIPC is involved in breast cancer progression through regulation of breast cancer cell proliferation, survival, and invasion. Furthermore, we found that the Akt/Mdm2/p53 axis, insulin-like growth factor-1 receptor, matrix metalloproteinase-9, and Cdc42 were downstream of GIPC signaling in breast cancer cells. Moreover, we showed that wild-type p53 reduced GIPC-induced breast cancer cell survival, whereas mutant p53 inhibited GIPC-induced cell invasion. Finally, we demonstrated that an N-myristoylated GIPC peptide (CR1023, N-myristoyl-PSQSSSEA) capable of blocking the PDZ domain of GIPC successfully inhibited MDA-MB-231 cell proliferation, survival, and further in vivo tumor growth. Taken together, these findings demonstrate the importance of GIPC in breast tumor progression, which has a potentially significant impact on the development of therapies against many common cancers expressing GIPC, including breast and renal cancer.
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Affiliation(s)
- Ling Wang
- Department of Biochemistry and Molecular Biology, Gugg 13-21C, Mayo Clinic College of Medicine, 200 First St. S.W., Rochester, MN 55905, USA
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Fu YM, Lin H, Liu X, Fang W, Meadows GG. Cell death of prostate cancer cells by specific amino acid restriction depends on alterations of glucose metabolism. J Cell Physiol 2010; 224:491-500. [DOI: 10.1002/jcp.22148] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Lee YH, Lin Q, Boelsterli UA, Chung MCM. The Sod2 mutant mouse as a model for oxidative stress: a functional proteomics perspective. MASS SPECTROMETRY REVIEWS 2010; 29:179-196. [PMID: 19294730 DOI: 10.1002/mas.20226] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Oxidative stress has been implicated in the pathogenesis of numerous human diseases and disorders, but the mechanistic basis often remains enigmatic. The Sod2 mutant mouse, which is sensitized to mitochondrial stress, is an ideal mutant model for studying the role of oxidative stress in a diverse range of complications arising from mitochondrial dysfunction and diminished antioxidant defense. To fully appreciate the widespread molecular consequences under increased oxidative stress, a systems approach utilizing proteomics is able to provide a global overview of the complex biological changes, which a targeted single biomolecular approach cannot address fully. This review focuses on the applications of mass spectrometry and functional proteomics in the Sod2 mouse. The combinatorial approach provides novel insights into the interplay of chemistry and biology, free radicals and proteins, thereby augmenting our understanding of how redox perturbations influence protein dynamics. Ultimately, this knowledge can lead to the development of free radical-targeted therapies.
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Affiliation(s)
- Yie Hou Lee
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, MD7, 8 Medical Drive, Singapore 117597, Singapore
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Chua R, Setzer S, Govindarajan B, Sexton D, Cohen C, Arbiser JL. Maspin expression, angiogenesis, prognostic parameters, and outcome in malignant melanoma. J Am Acad Dermatol 2009; 60:758-66. [DOI: 10.1016/j.jaad.2009.01.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2008] [Revised: 01/01/2009] [Accepted: 01/07/2009] [Indexed: 12/26/2022]
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14
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Unexpected autocrine role of vascular endothelial growth factor in squamous cell carcinoma. J Invest Dermatol 2009; 129:538-40. [PMID: 19209155 DOI: 10.1038/jid.2008.427] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Mirones et al. demonstrate that keratinocytes deficient in VEGF are capable of forming tumors but use a distinct form of aneuploidy and signaling to form tumors. This knowledge is important because inhibitors of VEGF, including bevacizumab (anti-VEGF antibodies) and sorafenib (Braf/VEGFR2 kinase inhibitor), have already entered the clinic. These agents may "remodel" tumor signaling.
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Formation of Mitochondrial Genome Concatemers as an Alternative Mechanism Promoting Oncogenic Transformation of Lymphoid Cells. ACTA ACUST UNITED AC 2009; 2:310-312. [PMID: 20046889 DOI: 10.1016/j.bihy.2009.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We have previously shown that AIDS-associated lymphomas and lymphoma cell lines contain mitochondrial genome concatemers not present in normal T-lymphocytes. Since cellular homeostasis and energy production rely heavily on mitochondrial DNA (mtDNA) stability, mutations in the mtDNA have long been linked to the development of various types of cancers. In most of the cases, however, neoplastically transformed cells harbor non-mutated mtDNA. Herein, we propose an alternative mechanism that shows how the formation of mitochondrial genome concatemers may promote oncogenic transformation of normal lymphoid progenitor cells when no mtDNA mutations or chromosomal aberrations are present. We detected high reactive oxygen species (ROS) levels in the lymphoma samples tested despite no identification of putative mutations in the coding mtDNA. We propose that the formation of atypical mtDNA configurations (i.e. dimers and concatemers) interferes with normal mitochondrial function. Unstable mitochondria lead to abnormal assembly and dysfunction of the oxidative phosphorylation (OXPHOS) complexes, eventually leading to oxidative stress from elevated production of intracellular ROS. ROS have been reported to activate transcription factors associated with cellular proliferation and apoptosis inhibition. Therefore, we hypothesize that formation of mitochondrial genome concatemers can augment endogenous ROS levels capable of promoting oncogenic transformation of normal lymphoid progenitor cells.
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Bhandarkar SS, Bromberg J, Carrillo C, Selvakumar P, Sharma RK, Perry BN, Govindarajan B, Fried L, Sohn A, Reddy K, Arbiser JL. Tris (dibenzylideneacetone) dipalladium, a N-myristoyltransferase-1 inhibitor, is effective against melanoma growth in vitro and in vivo. Clin Cancer Res 2008; 14:5743-8. [PMID: 18794083 DOI: 10.1158/1078-0432.ccr-08-0405] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
PURPOSE Melanoma is a solid tumor that is notoriously resistant to chemotherapy, and its incidence is rapidly increasing. Recently, several signaling pathways have been shown to contribute to melanoma tumorigenesis, including constitutive activation of mitogen-activated protein kinase, Akt, and Stat-3. The activation of multiple pathways may account in part for the difficulty in treatment of melanoma. In a recent screen of compounds, we found that an organopalladium compound, Tris (dibenzylideneacetone) dipalladium (Tris DBA), showed significant antiproliferative activity against melanoma cells. Studies were carried out to determine the mechanism of action of Tris DBA. EXPERIMENTAL DESIGN Tris DBA was tested on efficacy on proliferation of human and murine melanoma cells. To find the mechanism of action of Tris DBA, we did Western blot and gene array analyses. The ability of Tris DBA to block tumor growth in vivo was assessed. RESULTS Tris DBA has activity against B16 murine and A375 human melanoma in vivo. Tris DBA inhibits several signaling pathways including activation of mitogen-activated protein kinase, Akt, Stat-3, and S6 kinase activation, suggesting an upstream target. Tris DBA was found to be a potent inhibitor of N-myristoyltransferase-1, which is required for optimal activity of membrane-based signaling molecules. Tris DBA showed potent antitumor activity in vivo against melanoma. CONCLUSION Tris DBA is thus a novel inhibitor of N-myristoyltransferase-1 with significant antitumor activity and is well tolerated in vivo. Further preclinical evaluation of Tris DBA and related complexes is warranted.
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Abstract
In melanoma, at least four major signaling abnormalities have been described. They include beta-catenin deregulation (mutation/mislocalization), p16 loss, MAP kinase activation, and Akt activation. In this review, we discuss the role of the fourth pathway, known as the reactive oxygen driven tumor. The role of reactive oxygen in tumorigenesis is likely to relate to virtually all forms of cancer, and lends itself to specific therapies. These include blockade of reactive oxygen, resulting in decreased activation of NF-kappaB, which should sensitize tumors to chemotherapy and radiation. The phenotype of the reactive oxygen driven tumor can be monitored using available markers already in use in most hospital laboratories.
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Affiliation(s)
- Levi Fried
- Department of Dermatology, Emory University School of Medicine, Atlanta, GA, USA
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Funa NS, Reddy K, Bhandarkar S, Kurenova EV, Yang L, Cance WG, Welsh M, Arbiser JL. Shb Gene Knockdown Increases the Susceptibility of SVR Endothelial Tumor Cells to Apoptotic Stimuli In Vitro and In Vivo. J Invest Dermatol 2008; 128:710-6. [PMID: 17914455 DOI: 10.1038/sj.jid.5701057] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The Shb adapter protein is an Src homology 2-domain containing signaling intermediate operating downstream of several tyrosine kinase receptors, including vascular endothelial growth factor receptor-2. Shb is multifunctional and apoptosis is one response that Shb regulates. Inhibition of angiogenesis can be used in cancer therapy, and one way to achieve this is by inducing endothelial cell apoptosis. The angiosarcoma cell line SVR is of endothelial origin and can be used as a tool for studying in vivo inhibition of angiogenesis, and we thus employed an Shb-knockdown strategy using an inducible lentiviral system to reduce Shb levels in SVR cells and to study their responses. Shb knockdown increases the susceptibility of SVR cells to the apoptotic agents, cisplatin and staurosporine. Simultaneously, Shb knockdown causes reduced focal adhesion kinase (FAK) activation, monitored as phosphorylation of the regulatory residues tyrosines 576/577. No detectable effects on Akt or extracellular signal-regulated kinase activity were noted. The altered FAK activity coincided with an elongated cell phenotype that was particularly noticeable in the presence of staurosporine. In order to relate the effects of Shb knockdown to in vivo tumorigenicity, cells were exposed to the angiogenesis inhibitor honokiol, and again the cells with reduced Shb content exhibited increased apoptosis. Tumor growth in vivo was strongly reduced in the Shb-knockdown cells upon honokiol treatment. It is concluded that Shb regulates apoptosis and cell shape in tumor endothelial cells via FAK, and that Shb is a potential target for inhibition of angiogenesis.
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Affiliation(s)
- Nina S Funa
- Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden
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19
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Abstract
In this issue of the JCI, Nissen et al. report that a reciprocal interaction exists between the growth factors FGF2 and PDGF-BB, causing tumors to exhibit increased angiogenesis and metastatic potential. Both FGF2 and PDGF-BB signal through tyrosine kinase receptors, which have been the target of tyrosine kinase inhibitors for cancer therapies. These inhibitors are usually small molecules that inhibit the kinase activity of a receptor or nonreceptor tyrosine kinase, preventing downstream signaling. The results of this study shed light on why tyrosine kinase inhibitors have been useful for the treatment of only a small number of advanced cancers. Currently, a major focus of pharmaceutical companies is to develop ever more potent and specific tyrosine kinases. The results presented here suggest that this approach may not be successful.
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Affiliation(s)
- Jack L Arbiser
- Department of Dermatology and Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia, USA.
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20
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Sanz-Cameno P, Martín-Vílchez S, Lara-Pezzi E, Borque MJ, Salmerón J, Muñoz de Rueda P, Solís JA, López-Cabrera M, Moreno-Otero R. Hepatitis B virus promotes angiopoietin-2 expression in liver tissue: role of HBV x protein. THE AMERICAN JOURNAL OF PATHOLOGY 2006; 169:1215-22. [PMID: 17003480 PMCID: PMC1698851 DOI: 10.2353/ajpath.2006.051246] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The progression of chronic hepatitis B (CHB) is related to fibrosis and to the emergence of intrahepatic anomalous vascular structures. Hepatitis B virus (HBV) X protein transactivator (HBx) may play a significant role in both processes. To analyze how HBV induces vascular growth and remodeling in vivo, we assessed the expression of angiopoietin-2 (Ang2) in liver biopsies from CHB patients by reverse transcriptase-polymerase chain reaction, Western blotting, and immunohistochemistry because of the relevant role of Ang2 in vascular development, remodeling, and tumor promotion. In addition, we analyzed the influence of HBx in the expression of Ang2 in HBx-expressing hepatocyte cell lines and in hepatic stellate cells stimulated with conditional medium from HBx-hepatocytes. Ang2 expression was clearly up-regulated at both mRNA and protein levels in the liver of CHB patients, showing an intense staining of inflammatory infiltrates and vascular structures at inflamed portal areas. HBx-expressing hepatocytes and stimulated stellate cells showed a significant induction of Ang2 expression. PI3K inhibitor and antioxidants repressed the 64-kd Ang2 form but further enhanced the inflammation-related 50-kd molecular species. Therefore, HBx could account for the induction of Ang2 observed in CHB, especially the 50-kd form, contributing to pathological angiogenesis and hepatocellular carcinoma progression.
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Affiliation(s)
- Paloma Sanz-Cameno
- Hepatology (Planta 3), Hospital Universitario de la Princesa, Diego de León 62, E-28006, Madrid, Spain
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21
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Arbiser JL, Mann KP, Losken EM, Cohen C, Reddy K, Kokko K, Pollack B, Fan CY, O'Reilly F. Presence of p16 hypermethylation and Epstein–Barr virus infection in transplant-associated hematolymphoid neoplasm of the skin. J Am Acad Dermatol 2006; 55:794-8. [PMID: 17052484 DOI: 10.1016/j.jaad.2006.06.043] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2005] [Revised: 05/31/2006] [Accepted: 06/04/2006] [Indexed: 10/24/2022]
Abstract
BACKGROUND Epstein-Barr virus (EBV) is associated with the malignant transformation of B, T, and NK lymphocytes in humans, especially in immunosuppressed individuals. OBJECTIVE We describe an unusual case confined to the skin in a 39-year-old African American female following a renal transplant. METHODS Morphologically and immunophenotypically, the tumor was best classified as a plasmablastic lymphoma; however, the neoplastic population revealed rearrangements of both immunoglobulin heavy chain (IgG) and T cell receptor gamma (TCR-gamma). In situ hybridization demonstrated the presence of Epstein-Barr early RNA species (EBER) in the lymphoma cells, consistent with EBV infection. RESULTS We have previously demonstrated that EBV-induced reactive oxygen is associated with hypermethylation of the tumor suppressor gene p16 in Burkitt lymphoma, and that p16 hypermethylation is nearly always associated with EBV infection in Burkitt lymphoma. LIMITATIONS Further studies are needed to determine whether p16 is widely suppressed in immunosuppression-induced lymphoma. CONCLUSION In this study, we demonstrated high levels of hypermethylation of the tumor suppressor gene p16, thus supporting the role of EBV as a carcinogen in post-transplant lymphoproliferative disease.
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Affiliation(s)
- Jack L Arbiser
- Department of Dermatology, Emory University School of Medicine, Atlanta, Georgia 30322, USA.
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22
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Perry BN, Arbiser JL. The duality of angiogenesis: implications for therapy of human disease. J Invest Dermatol 2006; 126:2160-6. [PMID: 16983325 DOI: 10.1038/sj.jid.5700462] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Angiogenesis, the development of a microvasculature to a neoplastic, inflammatory, or infectious disease process, is a promising therapeutic target for disease therapy that has not been fully exploited. To further understand angiogenesis and its potential for therapy of dermatologic disorders, one must understand the many dualities of pathologic angiogenesis. These dualities are direct versus indirect angiogenesis inhibition, the differing origins of endothelial cells, which may arise either locally or through bone marrow stem cells, and regulation of vascular endothelial growth factor (VEGF) by hypoxia-dependent and/or independent pathways. The future development of therapy directed at pathologic angiogenesis is dependent upon an understanding of the factors that regulate angiogenesis. The presence of both direct and indirect inhibition of angiogenesis, the multiple sources of endothelial cells, and the regulation of VEGF by hypoxia-independent and/or-dependent pathways must taken into consideration if the promise of effective therapy of human disease is to be realized.
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Affiliation(s)
- Betsy N Perry
- Department of Dermatology, Emory University School of Medicine and Veterans Administration Hospital, Atlanta, Georgia 30322, USA
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23
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Wallace DC. A mitochondrial paradigm of metabolic and degenerative diseases, aging, and cancer: a dawn for evolutionary medicine. Annu Rev Genet 2006; 39:359-407. [PMID: 16285865 PMCID: PMC2821041 DOI: 10.1146/annurev.genet.39.110304.095751] [Citation(s) in RCA: 2343] [Impact Index Per Article: 130.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Life is the interplay between structure and energy, yet the role of energy deficiency in human disease has been poorly explored by modern medicine. Since the mitochondria use oxidative phosphorylation (OXPHOS) to convert dietary calories into usable energy, generating reactive oxygen species (ROS) as a toxic by-product, I hypothesize that mitochondrial dysfunction plays a central role in a wide range of age-related disorders and various forms of cancer. Because mitochondrial DNA (mtDNA) is present in thousands of copies per cell and encodes essential genes for energy production, I propose that the delayed-onset and progressive course of the age-related diseases results from the accumulation of somatic mutations in the mtDNAs of post-mitotic tissues. The tissue-specific manifestations of these diseases may result from the varying energetic roles and needs of the different tissues. The variation in the individual and regional predisposition to degenerative diseases and cancer may result from the interaction of modern dietary caloric intake and ancient mitochondrial genetic polymorphisms. Therefore the mitochondria provide a direct link between our environment and our genes and the mtDNA variants that permitted our forbears to energetically adapt to their ancestral homes are influencing our health today.
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Affiliation(s)
- Douglas C Wallace
- Center for Molecular and Mitochondrial Medicine and Genetics, Department of Ecology and Evolutionary Biology, University of California, Irvine, California 92697-3940, USA.
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24
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Arbiser JL, Li XC, Hossain CF, Nagle DG, Smith DM, Miller P, Govindarajan B, DiCarlo J, Landis-Piwowar KR, Dou QP. Naturally Occurring Proteasome Inhibitors from Mate Tea (Ilex paraguayensis) Serve as Models for Topical Proteasome Inhibitors. J Invest Dermatol 2005; 125:207-12. [PMID: 16098028 DOI: 10.1111/j.0022-202x.2005.23809.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Proteasome inhibitors have emerged as a clinically important therapy for neoplastic disease, with velcade, an organoboron compound used extensively in multiple myeloma. Recently, (-)-epigallocatechin gallate has been found to be a potent inhibitor of the proteasomal chymotrypsin-like activity. Other compounds that inhibit angiogenesis and are active as chemopreventive agents, such as curcumin, also inhibit proteasome activity. We have screened natural product extracts using ras-transformed endothelial cells (SVR cells) as a bioassay, and found that extracts of mate tea (Ilex paraguayensis) inhibit the growth of these endothelial cells. The extract was fractionated and found to have novel cinnamate esters that inhibit proteasome activity. Based upon the structures of the compounds isolated from mate tea, we examined synthetic analogs of these compounds for proteasome activity. Cinnamic acid amides had no inhibitory activity against proteasomes, whereas cinnamate esters displayed the activity. Based upon these findings, preclinical and clinical trials of topical cinnamate esters as proteasome inhibitors are warranted for psoriasis and other inflammatory disorders.
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Affiliation(s)
- Jack L Arbiser
- Department of Dermatology, Emory University School of Medicine, Atlanta, Georgia 30322, USA.
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25
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Arbiser JL. Implications of Epstein-Barr Virus (EBV)-induced carcinogenesis on cutaneous inflammation and carcinogenesis: evidence of recurring patterns of angiogenesis and signal transduction. J Invest Dermatol 2005; 124:xi-xii. [PMID: 15854019 DOI: 10.1111/j.0022-202x.2005.23695.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jack L Arbiser
- Department of Dermatology, Emory University School of Medicine, Atlanta, Georgia, USA
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26
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Park WR, Nakamura Y. p53CSV, a Novel p53-Inducible Gene Involved in the p53-Dependent Cell-Survival Pathway. Cancer Res 2005; 65:1197-206. [PMID: 15735003 DOI: 10.1158/0008-5472.can-04-3339] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Although a number of p53 target genes have been identified, the mechanisms of p53-dependent activities that determine cellular survival or death are still not fully understood. Here we report isolation of a novel p53 target gene, designated p53-inducible cell-survival factor (p53CSV). p53CSV contains a p53-binding site within its second exon and the reduction of expression by small interfering RNA enhanced apoptosis, whereas overexpression protected cells from apoptosis caused by DNA damage. p53CSV is induced significantly when cells have a low level of genotoxic stresses, but not when DNA damage is severe. p53CSV can modulate apoptotic pathways through interaction with Hsp70 that probably inhibits activity of apoptosis protease activating factor-1. Our results imply that under specific conditions of stress, p53 regulates transcription of p53CSV and that p53CSV is one of the important players in the p53-mediated cell survival.
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Affiliation(s)
- Woong-Ryeon Park
- Human Genome Center, Institute of Medical Science, University of Tokyo, Tokyo, Japan
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27
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Govindarajan B, Shah A, Cohen C, Arnold RS, Schechner J, Chung J, Mercurio AM, Alani R, Ryu B, Fan CY, Cuezva JM, Martinez M, Arbiser JL. Malignant transformation of human cells by constitutive expression of platelet-derived growth factor-BB. J Biol Chem 2005; 280:13936-43. [PMID: 15695519 DOI: 10.1074/jbc.m500411200] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Platelet-derived growth factors (PDGFs) comprise a family of growth factors strongly implicated in human oncogenesis. A number of human tumors overexpress PDGF family members or have translocations activating PDGF receptors. Whereas the epidemiologic evidence implicating PDGF in human tumors is strong, malignant transformation of human cells by overexpression of PDGF has not been demonstrated. We have previously developed a human cell line by the sequential introduction of large T cells and telomerase, and we have demonstrated that these cells express functionally active PDGF receptor (PDGFR) beta. In order to determine whether growth factor-mediated transformation of human cells could occur, these cells were transduced with a retrovirus encoding PDGF-BB. Constitutive expression of PDGF-BB led to malignant transformation in nude mice. This is the first demonstration of constitutive signaling causing malignant transformation of human cells. Some of the changes that occur because of constitutive growth factor expression can be reversed by the clinically approved tyrosine kinase inhibitor Glivec, whereas other changes are not reversible by tyrosine kinase inhibitors. Our model allows the assessment of epigenetic changes that occur during human carcinogenesis. In addition, these studies provide insight into the clinical failure of tyrosine kinase inhibitors as monotherapy for advanced malignancy.
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Affiliation(s)
- Baskaran Govindarajan
- Department of Dermatology, Emory University School of Medicine and Veterans Affairs Hospital, Atlanta, Georgia 30322, USA
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28
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Petros JA, Baumann AK, Ruiz-Pesini E, Amin MB, Sun CQ, Hall J, Lim S, Issa MM, Flanders WD, Hosseini SH, Marshall FF, Wallace DC. mtDNA mutations increase tumorigenicity in prostate cancer. Proc Natl Acad Sci U S A 2005; 102:719-24. [PMID: 15647368 PMCID: PMC545582 DOI: 10.1073/pnas.0408894102] [Citation(s) in RCA: 632] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Mutations in the mtDNA have been found to fulfill all of the criteria expected for pathogenic mutations causing prostate cancer. Focusing on the cytochrome oxidase subunit I (COI) gene, we found that 11-12% of all prostate cancer patients harbored COI mutations that altered conserved amino acids (mean conservation index=83%), whereas <2% of no-cancer controls and 7.8% of the general population had COI mutations, the latter altering less conserved amino acids (conservation index=71%). Four conserved prostate cancer COI mutations were found in multiple independent patients on different mtDNA backgrounds. Three other tumors contained heteroplasmic COI mutations, one of which created a stop codon. This latter tumor also contained a germ-line ATP6 mutation. Thus, both germ-line and somatic mtDNA mutations contribute to prostate cancer. Many tumors have been found to produce increased reactive oxygen species (ROS), and mtDNA mutations that inhibit oxidative phosphorylation can increase ROS production and thus contribute to tumorigenicity. To determine whether mutant tumors had increased ROS and tumor growth rates, we introduced the pathogenic mtDNA ATP6 T8993G mutation into the PC3 prostate cancer cell line through cybrid transfer and tested for tumor growth in nude mice. The resulting mutant (T8993G) cybrids were found to generate tumors that were 7 times larger than the wild-type (T8993T) cybrids, whereas the wild-type cybrids barely grew in the mice. The mutant tumors also generated significantly more ROS. Therefore, mtDNA mutations do play an important role in the etiology of prostate cancer.
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Affiliation(s)
- John A Petros
- Department of Urology, Emory University, 1365A Clifton Road, Atlanta, GA 30322, USA
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29
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Cerimele F, Battle T, Lynch R, Frank DA, Murad E, Cohen C, Macaron N, Sixbey J, Smith K, Watnick RS, Eliopoulos A, Shehata B, Arbiser JL. Reactive oxygen signaling and MAPK activation distinguish Epstein-Barr Virus (EBV)-positive versus EBV-negative Burkitt's lymphoma. Proc Natl Acad Sci U S A 2005; 102:175-9. [PMID: 15611471 PMCID: PMC544042 DOI: 10.1073/pnas.0408381102] [Citation(s) in RCA: 114] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2003] [Indexed: 02/07/2023] Open
Abstract
Burkitt's lymphoma (BL) is an aggressive B cell neoplasm, which is one of the most common neoplasms of childhood. It is highly widespread in East Africa, where it appears in endemic form associated with Epstein-Barr virus (EBV) infection, and around the world in a sporadic form in which EBV infection is much less common. In addition to being the first human neoplasm to be associated with EBV, BL is associated with a characteristic translocation, in which the Ig promoter is translocated to constitutively activate the c-myc oncogene. Although many BLs respond well to chemotherapy, a significant fraction fails to respond to therapy, leading to death. In this article, we demonstrate that EBV-positive BL expresses high levels of activated mitogen-activated protein kinase and reactive oxygen species (ROS), and that ROS directly regulate NF-kappaB activation. EBV-negative BLs exhibit activation of phosphoinositol 3-kinase, but do not have elevated levels of ROS. Elevated reactive oxygen may play a role in diverse forms of viral carcinogenesis in humans, including cancers caused by EBV, hepatitis B, C, and human T cell lymphotropic virus. Our findings imply that inhibition of ROS may be useful in the treatment of EBV-induced neoplasia.
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Affiliation(s)
- Francesca Cerimele
- Department of Dermatology, Emory University School of Medicine, 1639 Pierce Drive, Atlanta, GA 30322, USA
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30
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Arbiser JL, Fan CY, Su X, Van Emburgh BO, Cerimele F, Miller MS, Harvell J, Marinkovich MP. Involvement of p53 and p16 Tumor Suppressor Genes in Recessive Dystrophic Epidermolysis Bullosa-Associated Squamous Cell Carcinoma. J Invest Dermatol 2004; 123:788-90. [PMID: 15373786 DOI: 10.1111/j.0022-202x.2004.23418.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Recessive dystrophic epidermolysis bullosa (RDEB) is an autosomal recessive disorder characterized by the loss of collagen type VII, an intrinsic component of the anchoring fibrils, which attach the epidermis to the dermis. Of the genetic blistering disorders, RDEB has the highest rate of morbidity and mortality, with morbidity arising from fusion of digits in a mitten-glove deformity and growth retardation associated with anemia. The leading cause of death in RDEB is cutaneous squamous cell carcinoma, which causes death through invasion and metastasis. In order to better understand the pathogenesis of these rare but aggressive squamous cell carcinoma (SCC), we analyzed them for mutations in p53 and loss of p16ink4a. Three tumors demonstrated mutations in the p53 tumor suppressor gene. We also analyzed SCC from patients with RDEB for the presence of p16ink4a hypermethylation, and found two tumors that have loss of p16ink4a through hypermethylation. This is the first description of specific abnormalities in tumor suppressor genes in RDEB associated SCC, and demonstrates that alterations in both p53 and p16ink4a can contribute to RDEB associated SCC.
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Affiliation(s)
- Jack L Arbiser
- Department of Dermatology, Emory University School of Medicine and Atlanta VA Medical Center, Atlanta, Georgia 30322, USA.
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