151
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Ebos JML. Prodding the Beast: Assessing the Impact of Treatment-Induced Metastasis. Cancer Res 2015; 75:3427-35. [PMID: 26229121 DOI: 10.1158/0008-5472.can-15-0308] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 05/02/2015] [Indexed: 11/16/2022]
Abstract
The arsenal of treatments for most cancers fit broadly into the categories of surgery, chemotherapy, radiation, and targeted therapy. All represent proven and successful strategies, yet each can trigger local (tumor) and systemic (host) processes that elicit unwanted, often opposing, influences on cancer growth. Under certain conditions, nearly all cancer treatments can facilitate metastatic spread, often in parallel (and sometimes in clear contrast) with tumor reducing benefits. The paradox of treatment-induced metastasis (TIM) is not new. Supporting preclinical studies span decades, but are often overlooked. With recent evidence of prometastatic effects following treatment with targeted agents blocking the tumor microenvironment, a closer inspection of this literature is warranted. The TIM phenomena may diminish the impact of effective therapies and play a critical role in eventual resistance. Alternatively, it may simply exemplify the gap between animal and human studies, and therefore have little impact for patient disease and treatment. This review will focus on the preclinical model systems used to evaluate TIM and explore the mechanisms that influence overall treatment efficacy. Understanding the role of TIM in established and emerging drug treatment strategies may help provide rationales for future drug combination approaches with antimetastatic agents to improve outcomes and reduce resistance.
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Affiliation(s)
- John M L Ebos
- Department of Cancer Genetics, Roswell Park Cancer Institute, Buffalo, New York. Department of Medicine, Roswell Park Cancer Institute, Buffalo, New York.
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152
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Liu Y, Hawkins OE, Vilgelm AE, Pawlikowski JS, Ecsedy JA, Sosman JA, Kelley MC, Richmond A. Combining an Aurora Kinase Inhibitor and a Death Receptor Ligand/Agonist Antibody Triggers Apoptosis in Melanoma Cells and Prevents Tumor Growth in Preclinical Mouse Models. Clin Cancer Res 2015; 21:5338-48. [PMID: 26152738 DOI: 10.1158/1078-0432.ccr-15-0293] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Accepted: 06/30/2015] [Indexed: 01/07/2023]
Abstract
PURPOSE Preclinical studies show that inhibition of aurora kinases in melanoma tumors induces senescence and reduces tumor growth, but does not cause tumor regression. Additional preclinical models are needed to identify agents that will synergize with aurora kinase inhibitors to induce tumor regression. EXPERIMENTAL DESIGN We combined treatment with an aurora kinase A inhibitor, MLN8237, with agents that activate death receptors (Apo2L/TRAIL or death receptor 5 agonists) and monitored the ability of this treatment to induce tumor apoptosis and melanoma tumor regression using human cell lines and patient-derived xenograft (PDX) mouse models. RESULTS We found that this combined treatment led to apoptosis and markedly reduced cell viability. Mechanistic analysis showed that the induction of tumor cell senescence in response to the AURKA inhibitor resulted in a decreased display of Apo2L/TRAIL decoy receptors and increased display of one Apo2L/TRAIL receptor (death receptor 5), resulting in enhanced response to death receptor ligand/agonists. When death receptors were activated in senescent tumor cells, both intrinsic and extrinsic apoptotic pathways were induced independent of BRAF, NRAS, or p53 mutation status. Senescent tumor cells exhibited BID-mediated mitochondrial depolarization in response to Apo2L/TRAIL treatment. In addition, senescent tumor cells had a lower apoptotic threshold due to decreased XIAP and survivin expression. Melanoma tumor xenografts of one human cell line and one PDX displayed total blockage of tumor growth when treated with MLN8237 combined with DR5 agonist antibody. CONCLUSIONS These findings provide a strong rationale for combining senescence-inducing therapeutics with death receptor agonists for improved cancer treatment.
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Affiliation(s)
- Yan Liu
- Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, Tennessee. Department of Cancer Biology, Vanderbilt University Medical Center, Nashville, Tennessee. Division of Epidemiology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Oriana E Hawkins
- Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, Tennessee. Department of Cancer Biology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Anna E Vilgelm
- Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, Tennessee. Department of Cancer Biology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Jeffrey S Pawlikowski
- Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, Tennessee. Department of Cancer Biology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Jeffrey A Ecsedy
- Translational Medicine, Takeda Pharmaceuticals International C, Cambridge, Massachusetts
| | - Jeffrey A Sosman
- Division of Hematology/Oncology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Mark C Kelley
- Division of Surgical Oncology, Department of Surgery, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Ann Richmond
- Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, Tennessee. Department of Cancer Biology, Vanderbilt University Medical Center, Nashville, Tennessee.
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153
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The DNA damage response and immune signaling alliance: Is it good or bad? Nature decides when and where. Pharmacol Ther 2015; 154:36-56. [PMID: 26145166 DOI: 10.1016/j.pharmthera.2015.06.011] [Citation(s) in RCA: 117] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Accepted: 06/10/2015] [Indexed: 12/15/2022]
Abstract
The characteristic feature of healthy living organisms is the preservation of homeostasis. Compelling evidence highlight that the DNA damage response and repair (DDR/R) and immune response (ImmR) signaling networks work together favoring the harmonized function of (multi)cellular organisms. DNA and RNA viruses activate the DDR/R machinery in the host cells both directly and indirectly. Activation of DDR/R in turn favors the immunogenicity of the incipient cell. Hence, stimulation of DDR/R by exogenous or endogenous insults triggers innate and adaptive ImmR. The immunogenic properties of ionizing radiation, a prototypic DDR/R inducer, serve as suitable examples of how DDR/R stimulation alerts host immunity. Thus, critical cellular danger signals stimulate defense at the systemic level and vice versa. Disruption of DDR/R-ImmR cross talk compromises (multi)cellular integrity, leading to cell-cycle-related and immune defects. The emerging DDR/R-ImmR concept opens up a new avenue of therapeutic options, recalling the Hippocrates quote "everything in excess is opposed by nature."
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154
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Abstract
During the past several decades, the percentage of excess bodyweight and obese adults and children has increased dramatically, and is becoming one of the most serious public health problems worldwide. Extensive epidemiological studies have revealed that there is a strong link between obesity and some common cancers. However, the exact molecular mechanisms linking obesity and cancer are not fully understood yet. Recently, we have reported that dietary or genetic obesity provokes alterations of gut microbiota profile, thereby increasing the levels of deoxycholic acid (DCA), a secondary bile acid produced solely by the 7α-dehydroxylation of primary bile acids carried out by gut bacteria. The enterohepatic circulation of DCA provokes DNA damage and consequent cellular senescence in hepatic stellate cells (HSCs) which, in turn, secrete various inflammatory and tumor-promoting factors in the liver, thus facilitating hepatocellular carcinoma (HCC) development in mice. Interestingly, signs of senescence-associated secretory phenotypes were also observed in the HSCs in the area of HCC arising in patients with nonalcoholic steatohepatitis, implying that a similar pathway is likely to contribute to at least certain aspects of obesity-associated HCC development in humans as well. In this review, I will provide an overview of our recent work and discuss the next steps, focusing on the potential clinical implications of our findings.
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Affiliation(s)
- Eiji Hara
- Division of Cancer Biology, The Cancer Institute, Japanese Foundation for Cancer Research (JFCR), Tokyo, Japan
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155
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Smith AE, Kulasekararaj AG, Jiang J, Mian S, Mohamedali A, Gaken J, Ireland R, Czepulkowski B, Best S, Mufti GJ. CSNK1A1 mutations and isolated del(5q) abnormality in myelodysplastic syndrome: a retrospective mutational analysis. LANCET HAEMATOLOGY 2015; 2:e212-21. [PMID: 26688096 DOI: 10.1016/s2352-3026(15)00050-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 03/20/2015] [Accepted: 03/20/2015] [Indexed: 12/17/2022]
Abstract
BACKGROUND A mechanism for clonal growth advantage in isolated del(5q) disease remains elusive. CSNK1A1 resides on the critically deleted region, and deletion of this gene has been shown in mouse knockout and transplantation studies to produce some characteristics of bone marrow failure, including a proliferative advantage. We aimed to establish the frequency, nature, and clinical association of CSNK1A1 mutations in patients with myelodysplastic syndrome and associated myeloid neoplasms. METHODS Between June 1, 2004, and May 31, 2014, in King's College (London, UK), we did whole-exome sequencing of five patients with isolated del(5q) followed by targeted screening for CSNK1A1 mutations and 20 myelodysplastic syndrome-associated mutations in 245 additional patients with myeloid neoplasms. All patients met present WHO diagnostic criteria for myelodysplastic syndrome and other related myeloid neoplasms. FINDINGS 39 (16%) of 250 patients with myeloid neoplasms had isolated del(5q), of whom seven (18%) had CSNK1A1 mutations. All these mutations were missense and presented in a highly conserved region that is implicated in ATP catalysis. Serial sampling and response to lenalidomide treatment showed that CSNK1A1 mutations were highly associated with the del(5q) clone. Only one patient with a CSNK1A1 mutation showed complete cytogenetic response to lenalidomide. Four (57%) of the seven patients carrying a CSNK1A1 mutation showed disease progression coupled with an increase in mutant allele burden (all four were on lenalidomide). We detected coexisting myelodysplastic syndrome-related gene mutations in patients with CSNK1A1 mutations, including TP53. INTERPRETATION Similar to the effect of TP53 mutations on progression of del(5q) abnormality, mutant CSNK1A1 also gives rise to a poor prognosis in del(5q) abnormality, for which a coupled increase in P53 activation is suggested. CSNK1A1 mutations in del(5q) disease are important in the context of therapeutic manipulation and need incorporation into future prospective studies. FUNDING Leukaemia and Lymphoma Research.
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Affiliation(s)
- Alexander E Smith
- Department of Haematological Medicine, King's College London School of Medicine, Rayne Institute, King's College London, London, UK; Department of Haematology, King's College Hospital, King's College London, London, UK
| | - Austin G Kulasekararaj
- Department of Haematological Medicine, King's College London School of Medicine, Rayne Institute, King's College London, London, UK; Department of Haematology, King's College Hospital, King's College London, London, UK
| | - Jie Jiang
- Department of Haematological Medicine, King's College London School of Medicine, Rayne Institute, King's College London, London, UK; Department of Haematology, King's College Hospital, King's College London, London, UK
| | - Syed Mian
- Department of Haematological Medicine, King's College London School of Medicine, Rayne Institute, King's College London, London, UK
| | - Azim Mohamedali
- Department of Haematological Medicine, King's College London School of Medicine, Rayne Institute, King's College London, London, UK; Department of Haematology, King's College Hospital, King's College London, London, UK
| | - Joop Gaken
- Department of Haematological Medicine, King's College London School of Medicine, Rayne Institute, King's College London, London, UK
| | - Robin Ireland
- Department of Haematology, King's College Hospital, King's College London, London, UK
| | - Barbara Czepulkowski
- Department of Haematology, King's College Hospital, King's College London, London, UK
| | - Steven Best
- Department of Haematology, King's College Hospital, King's College London, London, UK
| | - Ghulam J Mufti
- Department of Haematological Medicine, King's College London School of Medicine, Rayne Institute, King's College London, London, UK; Department of Haematology, King's College Hospital, King's College London, London, UK.
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156
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Senescence-associated inflammatory responses: aging and cancer perspectives. Trends Immunol 2015; 36:217-28. [PMID: 25801910 DOI: 10.1016/j.it.2015.02.009] [Citation(s) in RCA: 274] [Impact Index Per Article: 30.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 02/23/2015] [Accepted: 02/24/2015] [Indexed: 02/08/2023]
Abstract
Senescent cells, albeit not proliferating, are metabolically and transcriptionally active, thereby capable of affecting their microenvironment, notably via the production of inflammatory mediators. These mediators maintain and propagate the senescence process to neighboring cells, and then recruit immune cells for clearing senescent cells. Among the inflammatory cues are molecules with pronounced tumor-controlling properties, both growth and invasion factors and inhibitory factors, working directly or via recruited immune cells. These senescence-inflammatory effects also prevail within tumors, mediated by the senescent tumor cells and the senescent tumor stroma. Here, we review the course and impact of senescence-associated inflammatory responses in aging and cancer. We propose that controlling senescence-associated inflammation by targeting specific inflammatory mediators may have a beneficial therapeutic effect in treatment of cancer and aging-related diseases.
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157
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Su T, Bondar T, Zhou X, Zhang C, He H, Medzhitov R. Two-signal requirement for growth-promoting function of Yap in hepatocytes. eLife 2015; 4:e02948. [PMID: 25667983 PMCID: PMC4363878 DOI: 10.7554/elife.02948] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2014] [Accepted: 02/09/2015] [Indexed: 01/09/2023] Open
Abstract
The transcriptional coactivator Yes-associated protein (Yap) promotes proliferation and inhibits apoptosis, suggesting that Yap functions as an oncogene. Most oncogenes, however, require a combination of at least two signals to promote proliferation. In this study, we present evidence that Yap activation is insufficient to promote growth in the otherwise normal tissue. Using a mosaic mouse model, we demonstrate that Yap overexpression in a fraction of hepatocytes does not lead to their clonal expansion, as proliferation is counterbalanced by increased apoptosis. To shift the activity of Yap towards growth, a second signal provided by tissue damage or inflammation is required. In response to liver injury, Yap drives clonal expansion, suppresses hepatocyte differentiation, and promotes a progenitor phenotype. These results suggest that Yap activation is insufficient to promote growth in the absence of a second signal thus coordinating tissue homeostasis and repair.
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Affiliation(s)
- Tian Su
- Department of Immunobiology, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, United States
| | - Tanya Bondar
- Department of Immunobiology, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, United States
| | - Xu Zhou
- Department of Immunobiology, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, United States
| | - Cuiling Zhang
- Department of Immunobiology, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, United States
| | - Hang He
- Peking-Yale Joint Center for Plant Molecular Genetics and Agro-Biotechnology, National Laboratory of Protein Engineering and Plant Genetic Engineering, College of Life Sciences, Peking University, Beijing, China
| | - Ruslan Medzhitov
- Department of Immunobiology, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, United States
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158
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Yoshimoto S, Mun Loo T, Hara E. Cellular senescence and liver cancer: a gut microbial connection. Inflamm Regen 2015. [DOI: 10.2492/inflammregen.35.106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Shin Yoshimoto
- CREST, Japan Science and Technology Agency (JST), Kawaguchi, Japan
- The Cancer Institute, Japanese Foundation for Cancer Research (JFCR), Tokyo, Japan
| | - Tze Mun Loo
- The Cancer Institute, Japanese Foundation for Cancer Research (JFCR), Tokyo, Japan
| | - Eiji Hara
- CREST, Japan Science and Technology Agency (JST), Kawaguchi, Japan
- The Cancer Institute, Japanese Foundation for Cancer Research (JFCR), Tokyo, Japan
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159
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Lasry A, Aran D, Zinger A, Hamza H, Kadosh E, Elyada E, Pribluda A, Hellman A, Oren M, Pikarsky E, Ben-Neriah Y. S-6. Cytokine 2014. [DOI: 10.1016/j.cyto.2014.07.226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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160
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Storer M, Keyes WM. Developing senescence to remodel the embryo. Commun Integr Biol 2014; 7:970969. [PMID: 26842300 PMCID: PMC4594451 DOI: 10.4161/cib.29098] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 05/02/2014] [Accepted: 05/02/2014] [Indexed: 11/19/2022] Open
Abstract
Cellular senescence is an irreversible form of cell cycle arrest that has been linked to several pathological conditions. In particular, senescence can function as a tumor suppressor mechanism, but is also thought to contribute to organismal aging. Paradoxically however, through the secretion of various factors, collectively termed the senescence-associated secretory phenotype (SASP), senescent cells can also have tumor-promoting and tissue-remodeling functions. In addition, senescent cells can play beneficial roles in tissue repair and wound healing, and reconciling these contradictory features from an evolutionary standpoint has been challenging. Moreover, senescent cells had not previously been documented in non-pathological conditions. Recently however, 2 studies have identified cellular senescence as a programmed mechanism that contributes to tissue patterning and remodeling during normal embryonic development. These findings have significant implications for our understanding of cellular senescence and help to clarify the paradoxes and the evolutionary origin of this process.
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Affiliation(s)
- Mekayla Storer
- Centre for Genomic Regulation (CRG); Barcelona, Spain; Universitat Pompeu Fabra (UPF); Barcelona, Spain
| | - William M Keyes
- Centre for Genomic Regulation (CRG); Barcelona, Spain; Universitat Pompeu Fabra (UPF); Barcelona, Spain
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161
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Nakamura M, Ohsawa S, Igaki T. Mitochondrial defects trigger proliferation of neighbouring cells via a senescence-associated secretory phenotype in Drosophila. Nat Commun 2014; 5:5264. [DOI: 10.1038/ncomms6264] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Accepted: 09/12/2014] [Indexed: 12/27/2022] Open
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162
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Biological functions of casein kinase 1 isoforms and putative roles in tumorigenesis. Mol Cancer 2014; 13:231. [PMID: 25306547 PMCID: PMC4201705 DOI: 10.1186/1476-4598-13-231] [Citation(s) in RCA: 166] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Accepted: 09/26/2014] [Indexed: 12/13/2022] Open
Abstract
Isoforms of the casein kinase 1 (CK1) family have been shown to phosphorylate key regulatory molecules involved in cell cycle, transcription and translation, the structure of the cytoskeleton, cell-cell adhesion and receptor-coupled signal transduction. They regulate key signaling pathways known to be critically involved in tumor progression. Recent results point to an altered expression or activity of different CK1 isoforms in tumor cells. This review summarizes the expression and biological function of CK1 family members in normal and malignant cells and the evidence obtained so far about their role in tumorigenesis.
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163
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Are there roles for brain cell senescence in aging and neurodegenerative disorders? Biogerontology 2014; 15:643-60. [PMID: 25305051 DOI: 10.1007/s10522-014-9532-1] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Accepted: 09/13/2014] [Indexed: 12/30/2022]
Abstract
The term cellular senescence was introduced more than five decades ago to describe the state of growth arrest observed in aging cells. Since this initial discovery, the phenotypes associated with cellular senescence have expanded beyond growth arrest to include alterations in cellular metabolism, secreted cytokines, epigenetic regulation and protein expression. Recently, senescence has been shown to play an important role in vivo not only in relation to aging, but also during embryonic development. Thus, cellular senescence serves different purposes and comprises a wide range of distinct phenotypes across multiple cell types. Whether all cell types, including post-mitotic neurons, are capable of entering into a senescent state remains unclear. In this review we examine recent data that suggest that cellular senescence plays a role in brain aging and, notably, may not be limited to glia but also neurons. We suggest that there is a high level of similarity between some of the pathological changes that occur in the brain in Alzheimer's and Parkinson's diseases and those phenotypes observed in cellular senescence, leading us to propose that neurons and glia can exhibit hallmarks of senescence previously documented in peripheral tissues.
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164
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Senescent cells: SASPected drivers of age-related pathologies. Biogerontology 2014; 15:627-42. [PMID: 25217383 DOI: 10.1007/s10522-014-9529-9] [Citation(s) in RCA: 140] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 09/01/2014] [Indexed: 12/19/2022]
Abstract
The progression of physiological ageing is driven by intracellular aberrations including telomere attrition, genomic instability, epigenetic alterations and loss of proteostasis. These in turn damage cells and compromise their functionality. Cellular senescence, a stable irreversible cell-cycle arrest, is elicited in damaged cells and prevents their propagation in the organism. Under normal conditions, senescent cells recruit the immune system which facilitates their removal from tissues. Nevertheless, during ageing, tissue-residing senescent cells tend to accumulate, and might negatively impact their microenvironment via profound secretory phenotype with pro-inflammatory characteristics, termed senescence-associated secretory phenotype (SASP). Indeed, senescent cells are mostly abundant at sites of age-related pathologies, including degenerative disorders and malignancies. Interestingly, studies on progeroid mice indicate that selective elimination of senescent cells can delay age-related deterioration. This suggests that chronic inflammation induced by senescent cells might be a main driver of these pathologies. Importantly, senescent cells accumulate as a result of deficient immune surveillance, and their removal is increased upon the use of immune stimulatory agents. Insights into mechanisms of senescence surveillance could be combined with current approaches for cancer immunotherapy to propose new preventive and therapeutic strategies for age-related diseases.
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165
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Abstract
The Helmholtz Alliance Preclinical Comprehensive Cancer Center (PCCC; www.helmholtz-pccc.de) hosted the "1st International Kloster Seeon Meeting on Mouse Models of Human Cancer" in the Seeon monastery (Germany) from March 8 to 11, 2014. The meeting focused on the development and application of novel mouse models in tumor research and high-throughput technologies to overcome one of the most critical bottlenecks in translational bench-to-bedside tumor biology research. Moreover, the participants discussed basic molecular mechanisms underlying tumor initiation, progression, metastasis, and therapy resistance, which are the prerequisite for the development of novel treatment strategies and clinical applications in cancer therapy.
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Affiliation(s)
- Barbara C Böck
- Division of Vascular Oncology and Metastasis, German Cancer Research Center Heidelberg (DKFZ-ZMBH Alliance), Heidelberg, Germany. Department of Vascular Biology and Tumor Angiogenesis (CBTM), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Ulrike Stein
- Max-Delbrück-Center for Molecular Medicine (MDC), Berlin, Germany. Experimental and Clinical Research Center, Charité University Medicine, Berlin, Germany. German Consortium for Translational Cancer Research (DKTK), Heidelberg, Germany
| | - Clemens A Schmitt
- Max-Delbrück-Center for Molecular Medicine (MDC), Berlin, Germany. German Consortium for Translational Cancer Research (DKTK), Heidelberg, Germany. Molecular Cancer Research Center (MKFZ), Charité University Medical Hospital, Berlin, Germany
| | - Hellmut G Augustin
- Division of Vascular Oncology and Metastasis, German Cancer Research Center Heidelberg (DKFZ-ZMBH Alliance), Heidelberg, Germany. Department of Vascular Biology and Tumor Angiogenesis (CBTM), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany. German Consortium for Translational Cancer Research (DKTK), Heidelberg, Germany.
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166
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Cooks T, Harris CC, Oren M. Caught in the cross fire: p53 in inflammation. Carcinogenesis 2014; 35:1680-90. [PMID: 24942866 PMCID: PMC4123652 DOI: 10.1093/carcin/bgu134] [Citation(s) in RCA: 114] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Revised: 06/06/2014] [Accepted: 06/10/2014] [Indexed: 12/17/2022] Open
Abstract
The p53 transcription factor is a major tumor suppressor, whose diverse activities serve to ensure genome stability and inhibit neoplastic processes. In recent years, it is becoming increasingly clear that p53 also plays a broader role in maintaining cellular homeostasis, as well as contributing to tissue homeostasis in a non-cell-autonomous fashion. Chronic inflammation is a potential cancer-promoting condition, and as such is also within the radar of p53, which mounts a multifaceted attempt to prevent the escalation of chronic tissue imbalance into neoplasia. Recent understanding of the p53 pathway and other family members reveals a broad interaction with inflammatory elements such as reactive oxygen and nitrogen species, cytokines, infectious agents and major immune-regulatory pathways like nuclear factor-kappaB. This complex cross talk is highly dependent on p53 status, as different p53 isoforms and p53 mutants can mediate different responses and even promote chronic inflammation and associated cancer, acting in the tumor cells as well as in the stromal and immune compartments.
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Affiliation(s)
- Tomer Cooks
- Laboratory of Human Carcinogenesis, National Cancer Institute, NIH, Bethesda, MD 20892-4258, USA and Molecular Cell Biology, Weizmann Institute for Science, Rehovot 76100, Israel
| | - Curtis C Harris
- Laboratory of Human Carcinogenesis, National Cancer Institute, NIH, Bethesda, MD 20892-4258, USA and Molecular Cell Biology, Weizmann Institute for Science, Rehovot 76100, Israel
| | - Moshe Oren
- Molecular Cell Biology, Weizmann Institute for Science, Rehovot 76100, Israel
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167
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Abstract
The core aspect of the senescent phenotype is a stable state of cell cycle arrest. However, this is a disguise that conceals a highly active metabolic cell state with diverse functionality. Both the cell-autonomous and the non-cell-autonomous activities of senescent cells create spatiotemporally dynamic and context-dependent tissue reactions. For example, the senescence-associated secretory phenotype (SASP) provokes not only tumour-suppressive but also tumour-promoting responses. Senescence is now increasingly considered to be an integrated and widespread component that is potentially important for tumour development, tumour suppression and the response to therapy.
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Affiliation(s)
- Pedro A Pérez-Mancera
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Robinson Way, Cambridge, CB2 0RE, UK
| | - Andrew R J Young
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Robinson Way, Cambridge, CB2 0RE, UK
| | - Masashi Narita
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Robinson Way, Cambridge, CB2 0RE, UK
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168
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Physiological and pathological consequences of cellular senescence. Cell Mol Life Sci 2014; 71:4373-86. [PMID: 25080110 PMCID: PMC4207941 DOI: 10.1007/s00018-014-1691-3] [Citation(s) in RCA: 160] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 07/21/2014] [Accepted: 07/23/2014] [Indexed: 12/11/2022]
Abstract
Cellular senescence, a permanent state of cell cycle arrest accompanied by a complex phenotype, is an essential mechanism that limits tumorigenesis and tissue damage. In physiological conditions, senescent cells can be removed by the immune system, facilitating tumor suppression and wound healing. However, as we age, senescent cells accumulate in tissues, either because an aging immune system fails to remove them, the rate of senescent cell formation is elevated, or both. If senescent cells persist in tissues, they have the potential to paradoxically promote pathological conditions. Cellular senescence is associated with an enhanced pro-survival phenotype, which most likely promotes persistence of senescent cells in vivo. This phenotype may have evolved to favor facilitation of a short-term wound healing, followed by the elimination of senescent cells by the immune system. In this review, we provide a perspective on the triggers, mechanisms and physiological as well as pathological consequences of senescent cells.
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169
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Abstract
Multiple epidemiological studies have revealed that excess bodyweight, such as in people who are overweight or obese (defined by a body mass index higher than 25 kg/m(2)), is a major risk factor for not only diabetes and cardiovascular diseases but also cancer. Effective strategies for obesity prevention are therefore needed for cancer prevention. However, because the prevalence of excess bodyweight in most developed countries has been increasing markedly over the past several decades, with no signs of abating, alternative approaches are also required to conquer obesity-associated cancer. Therefore, we sought to understand the molecular mechanisms underlying obesity-associated cancer. Although several phenomena have been proposed to explain how obesity increases cancer risk, the exact molecular mechanisms that integrate these phenomena have remained largely obscure. Recently, we have traced the association between obesity and increased cancer risk to gut microbiota communities that produce a DNA-damaging bile acid. The analyses also revealed the role of cellular senescence in cancer, which we have been studying for the past few decades. In this review, we provide an overview of our work and discuss the next steps, focusing on the potential clinical implications of these findings.
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Affiliation(s)
- Naoko Ohtani
- Authors' Affiliation: Division of Cancer Biology, The Cancer Institute, Japanese Foundation for Cancer Research (JFCR), Tokyo, Japan
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Kidane D, Chae WJ, Czochor J, Eckert KA, Glazer PM, Bothwell ALM, Sweasy JB. Interplay between DNA repair and inflammation, and the link to cancer. Crit Rev Biochem Mol Biol 2014; 49:116-39. [PMID: 24410153 DOI: 10.3109/10409238.2013.875514] [Citation(s) in RCA: 117] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
DNA damage and repair are linked to cancer. DNA damage that is induced endogenously or from exogenous sources has the potential to result in mutations and genomic instability if not properly repaired, eventually leading to cancer. Inflammation is also linked to cancer. Reactive oxygen and nitrogen species (RONs) produced by inflammatory cells at sites of infection can induce DNA damage. RONs can also amplify inflammatory responses, leading to increased DNA damage. Here, we focus on the links between DNA damage, repair, and inflammation, as they relate to cancer. We examine the interplay between chronic inflammation, DNA damage and repair and review recent findings in this rapidly emerging field, including the links between DNA damage and the innate immune system, and the roles of inflammation in altering the microbiome, which subsequently leads to the induction of DNA damage in the colon. Mouse models of defective DNA repair and inflammatory control are extensively reviewed, including treatment of mouse models with pathogens, which leads to DNA damage. The roles of microRNAs in regulating inflammation and DNA repair are discussed. Importantly, DNA repair and inflammation are linked in many important ways, and in some cases balance each other to maintain homeostasis. The failure to repair DNA damage or to control inflammatory responses has the potential to lead to cancer.
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Affiliation(s)
- Dawit Kidane
- Departments of Therapeutic Radiology and Genetics
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171
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Elinav E, Nowarski R, Thaiss CA, Hu B, Jin C, Flavell RA. Inflammation-induced cancer: crosstalk between tumours, immune cells and microorganisms. Nat Rev Cancer 2013; 13:759-71. [PMID: 24154716 DOI: 10.1038/nrc3611] [Citation(s) in RCA: 1371] [Impact Index Per Article: 124.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Inflammation is a fundamental innate immune response to perturbed tissue homeostasis. Chronic inflammatory processes affect all stages of tumour development as well as therapy. In this Review, we outline the principal cellular and molecular pathways that coordinate the tumour-promoting and tumour-antagonizing effects of inflammation and we discuss the crosstalk between cancer development and inflammatory processes. In addition, we discuss the recently suggested role of commensal microorganisms in inflammation-induced cancer and we propose that understanding this microbial influence will be crucial for targeted therapy in modern cancer treatment.
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Affiliation(s)
- Eran Elinav
- 1] Department of Immunology, Weizmann Institute of Science, 100 Herzl Street, Rehovot 76100, Israel. [2]
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172
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Abstract
Inflammation is increasingly recognized as an essential component of tumor development, but the origin of tumor-associated inflammation remains largely unknown. In this issue of Cancer Cell, Pribluda and colleagues find that chronic stress initiates senescence-inflammatory response, which can promote tumorigenesis in the absence of exogenous inflammatory triggers.
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