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Maffei F, Angelini S, Cantelli Forti G, Hrelia P. Blood Biomarkers Linked to Oxidative Stress and Chronic Inflammation for Risk Assessment of Colorectal Neoplasia. CURRENT COLORECTAL CANCER REPORTS 2013. [DOI: 10.1007/s11888-012-0156-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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252
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Schweiger MR, Hussong M, Röhr C, Lehrach H. Genomics and epigenomics of colorectal cancer. WILEY INTERDISCIPLINARY REVIEWS-SYSTEMS BIOLOGY AND MEDICINE 2013; 5:205-19. [PMID: 23325509 DOI: 10.1002/wsbm.1206] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Colorectal cancer is one of the most common cancer types worldwide and accounts for approximately 600,000 deaths annually. Work over the last decades has uncovered a number of tumor-suppressor and oncogenes which are frequently mutated and might thus be responsible for the malignant transformation. However, only with the development of new high-throughput technologies systematic analyses of the genome and epigenomes became feasible. While data generation has increased exponential, we are now faced with new challenges to transform these data into useful models that help predicting the outcome of genomic aberrations and to develop novel diagnostic and therapeutic strategies. As a basis for the modeling it is essential to understand and integrate current knowledge. We review previous and current ideas in colorectal cancer development and focus on a pathway oriented view. We show that colorectal cancer is a multilayer complex disease affecting the genome as well as the epigenome with direct consequences on the gene and microRNA (miRNA) expression signatures. The goal is to illustrate the current principles of colorectal cancer pathogenesis and to illustrate the need for elaborate computer modeling systems.
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Affiliation(s)
- Michal-Ruth Schweiger
- Department of Vertebrate Genomics, Max Planck Institute for Molecular Genetics, Berlin, Germany.
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253
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Novel insertion mutation p.Asp610GlyfsX23 in APC gene causes familial adenomatous polyposis in Chinese families. Gene 2013; 516:204-8. [PMID: 23291410 DOI: 10.1016/j.gene.2012.12.077] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2012] [Revised: 12/05/2012] [Accepted: 12/06/2012] [Indexed: 12/30/2022]
Abstract
OBJECTIVE The aim of the study was to identify the causative gene defects associated with familial adenomatous polyposis (FAP) in two Chinese pedigrees. METHODS The diagnosis of FAP patients was confirmed by clinical manifestations, family histories, colonoscopy and pathology examinations. Blood samples were collected and genomic DNA was extracted. The mutation analysis of the adenomatous polyposis coli (APC) and human mutY homolog (MUTYH) genes was conducted by direct polymerase chain reaction (PCR) sequencing and multiplex ligation-dependent probe amplification (MLPA). RESULTS In pedigree A, the results of direct PCR sequencing revealed a heterozygous insertion mutation at codon 610 in exon 15 of APC gene (c.1828_1829insG), which resulted in frameshift change (p.Asp610GlyfsX23) in all 4 patients, but was absent in the unaffected familial members and controls. In pedigree B, we didn't identify that causative mutations cosegregated with the clinical phenotype in the APC and MUTYH genes. CONCLUSIONS We identified a novel insertion mutation as the pathogenic gene of FAP in Chinese population, which could enrich the germline mutation spectrum of APC gene, and the prophylactic proctocolectomy for the mutation carrier in family should be considered.
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Molecular Parameters for Prognostic and Predictive Assessment in Colorectal Cancer. Updates Surg 2013. [DOI: 10.1007/978-88-470-2670-4_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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255
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Lightfoot YL, Rehman HU, Myers AD, Mohamadzadeh M. Mitigating colon cancer with a novel strain of Lactobacillus acidophilus: a (re-)balancing act. Immunotherapy 2012. [PMID: 23194356 DOI: 10.2217/imt.12.98] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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256
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Huang X, Wang Y, Yu T, Liu B, Li X, Li W, Chen S, Zhao Q, Li X, Yang F, Wang Q, Wang J, Xiao Y, Xu Y, Feng G, Peng Z, He L, He G. Association study of APC polymorphisms with colorectal cancer in Han Chinese. Clin Biochem 2012; 45:1669-72. [PMID: 22796397 DOI: 10.1016/j.clinbiochem.2012.07.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Revised: 06/14/2012] [Accepted: 07/01/2012] [Indexed: 12/22/2022]
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257
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Grivennikov SI. Inflammation and colorectal cancer: colitis-associated neoplasia. Semin Immunopathol 2012; 35:229-44. [PMID: 23161445 DOI: 10.1007/s00281-012-0352-6] [Citation(s) in RCA: 391] [Impact Index Per Article: 32.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Accepted: 09/27/2012] [Indexed: 12/12/2022]
Abstract
Connection between inflammation and cancer is a rapidly developing field. Epidemiological data suggests that inflammation along with distinct arms of host immune system plays a very important role in the development and progression of many different cancers. Inflammatory bowel disease (IBD) is an important risk factor for the development of colon cancer, namely, colitis-associated cancer (CAC). The molecular mechanisms by which inflammation promotes cancer development are still being uncovered and may differ between CAC and other forms of colorectal cancer. Recent work has shed light on the role of distinct immune cells, cytokines, and other immune mediators in virtually all of the steps of colonic tumorigenesis, including tumor initiation and promotion as well as progression and metastasis. The close proximity of colonic tumors to the myriad of intestinal microbes, as well as instrumental role of microbiota in IBD, introduces microbes as new players capable of triggering inflammation and possibly promoting tumorigenesis. Various mechanisms of CAC tumorigenesis as well as new possible hints for the future approaches for prevention and therapy are discussed in this review.
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Affiliation(s)
- Sergei I Grivennikov
- Cancer Prevention and Control Program, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111-2497, USA.
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258
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Adenomatous polyposis coli interacts with flap endonuclease 1 to block its nuclear entry and function. Neoplasia 2012; 14:495-508. [PMID: 22787431 DOI: 10.1593/neo.12680] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2012] [Revised: 05/04/2012] [Accepted: 05/07/2012] [Indexed: 11/18/2022] Open
Abstract
In previous studies, we found that adenomatous polyposis coli (APC) blocks the base excision repair (BER) pathway by interacting with 5'-flap endonuclease 1 (Fen1). In this study, we identify the molecular features that contribute to the formation and/or stabilization of the APC/Fen1 complex that determines the extent of BER inhibition, and the subsequent accumulation of DNA damage creates mutagenic lesions leading to transformation susceptibility. We show here that APC binds to the nuclear localization sequence of Fen1 (Lys(365)Lys(366)Lys(367)), which prevents entry of Fen1 into the nucleus and participation in Pol-β-directed long-patch BER. We also show that levels of the APC/Fen1 complex are higher in breast tumors than in the surrounding normal tissues. These studies demonstrate a novel role for APC in the suppression of Fen1 activity in the BER pathway and a new biomarker profile to be explored to identify individuals who may be susceptible to the development of mammary and other tumors.
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259
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Groden J, Burt R. Genotypes and phenotypes: animal models of familial adenomatous polyposis coli. Gastroenterology 2012; 143:1133-1135. [PMID: 23010297 DOI: 10.1053/j.gastro.2012.09.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Affiliation(s)
- Joanna Groden
- Department of Molecular Virology, Immunology & Medical Genetics, The Ohio State University College of Medicine, Columbus, Ohio.
| | - Randall Burt
- Department of Medicine, Division of Gastroenterology, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, Utah
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Ye Y, Madison B, Wu X, Rustgi AK. A LIN28B polymorphism predicts for colon cancer survival. Cancer Biol Ther 2012; 13:1390-5. [PMID: 23052130 DOI: 10.4161/cbt.22336] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
The pathogenesis of sporadic colorectal cancer involves distinct pathways, with characteristic genomic alterations. The first pathway, chromosome instability (CIN), is driven by APC mutations and is typified by Kras mutations, p53 mutation/loss of heterozygosity, and deletions at chromosome 18q. The second pathway is referred to as microsatellite instability (MSI), a genetic hallmark of the accumulated mutations that occur as a consequence of derangements in the mismatch repair genes. Finally, proximal colon cancers may involve methylation of a number of genes, which is frequently referred to as the CpG island methylator phenotype (CIMP), and are associated with B-raf mutations. The ability to stratify colorectal cancers by risk would be facilitated by the identification of polymorphisms that might be utilized as biomarkers. LIN28B is an RNA binding protein that is overexpressed in colon cancers. We find that LIN28B rs314277 is associated with significant recurrence of colorectal cancer in Stage II disease, which may have translational therapeutic implications.
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Affiliation(s)
- Yuanqing Ye
- Department of Epidemiology, Division of Cancer Prevention and Population Sciences, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
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261
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Cheung KL, Lee JH, Khor TO, Wu TY, Li GX, Chan J, Yang CS, Kong ANT. Nrf2 knockout enhances intestinal tumorigenesis in Apc(min/+) mice due to attenuation of anti-oxidative stress pathway while potentiates inflammation. Mol Carcinog 2012; 53:77-84. [PMID: 22911891 DOI: 10.1002/mc.21950] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Revised: 06/22/2012] [Accepted: 07/26/2012] [Indexed: 12/13/2022]
Abstract
Mutations in adenomatous polyposis coli (APC) gene are found in more than 80% of colorectal cancer (CRC) patients. The nuclear transcription factor Nrf2 plays a central role in the regulation of oxidative stress and inflammation. Previously, we have shown that chronic inflammation in Nrf2(-/-) (Nrf2 knockout; KO) mice resulted in higher expression of inflammatory markers and cytokines, coupled with higher inflammatory damage to the colonic crypt cells, as compared to the Nrf2(+/+) (wild type; WT) mice. Induction of mutation in the colon by administration of carcinogen, AOM prior to DSS-induced inflammation resulted in higher tumor incidence and numbers in Nrf2KO mice. These results indicate that Nrf2-dependent inhibition of inflammation appears to be critical in inhibiting mutation-initiated colorectal carcinogenesis. In this study, we aim to investigate if loss of Nrf2 would dose-dependently promote intestinal tumorigenesis in Apc(min/+) mice. To demonstrate the in vivo mechanisms, we constructed both Apc mutated and Nrf2 deficient strain Apc(min/+) mice with C57BL/6 Nrf2KO mice to obtain F1, Apc(min/+) ;Nrf2(+/-) and F2, Apc(min/+) ;Nrf2(-/-) mice. Nrf2KO decreased the protein expression of antioxidant enzyme NQO1 in Apc(min/+) . In contrast, Nrf2KO enhanced the expression of inflammatory markers such as COX-2, cPLA, LTB4 in Apc(min/+) . Finally, Nrf2KO resulted in higher level of PCNA and c-Myc expression in intestinal tissue, indicating the deficiency of Nrf2 promotes proliferation of intestinal crypt cells in Apc(min/+) . Taken together, our results suggest that Nrf2KO attenuates anti-oxidative stress pathway, induces inflammation, and increases proliferative potential in the intestinal crypts leading to enhanced intestinal carcinogenesis and adenomas in Apc(min/+) .
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Affiliation(s)
- Ka Lung Cheung
- Graduate Program in Pharmaceutical Science, Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, New Jersey; Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, New Jersey; Center for Cancer Prevention Research, Rutgers, The State University of New Jersey, Piscataway, New Jersey
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262
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Pradhan MP, Prasad NKA, Palakal MJ. A systems biology approach to the global analysis of transcription factors in colorectal cancer. BMC Cancer 2012; 12:331. [PMID: 22852817 PMCID: PMC3539921 DOI: 10.1186/1471-2407-12-331] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Accepted: 06/21/2012] [Indexed: 02/08/2023] Open
Abstract
Background Biological entities do not perform in isolation, and often, it is the nature and degree of interactions among numerous biological entities which ultimately determines any final outcome. Hence, experimental data on any single biological entity can be of limited value when considered only in isolation. To address this, we propose that augmenting individual entity data with the literature will not only better define the entity’s own significance but also uncover relationships with novel biological entities. To test this notion, we developed a comprehensive text mining and computational methodology that focused on discovering new targets of one class of molecular entities, transcription factors (TF), within one particular disease, colorectal cancer (CRC). Methods We used 39 molecular entities known to be associated with CRC along with six colorectal cancer terms as the bait list, or list of search terms, for mining the biomedical literature to identify CRC-specific genes and proteins. Using the literature-mined data, we constructed a global TF interaction network for CRC. We then developed a multi-level, multi-parametric methodology to identify TFs to CRC. Results The small bait list, when augmented with literature-mined data, identified a large number of biological entities associated with CRC. The relative importance of these TF and their associated modules was identified using functional and topological features. Additional validation of these highly-ranked TF using the literature strengthened our findings. Some of the novel TF that we identified were: SLUG, RUNX1, IRF1, HIF1A, ATF-2, ABL1, ELK-1 and GATA-1. Some of these TFs are associated with functional modules in known pathways of CRC, including the Beta-catenin/development, immune response, transcription, and DNA damage pathways. Conclusions Our methodology of using text mining data and a multi-level, multi-parameter scoring technique was able to identify both known and novel TF that have roles in CRC. Starting with just one TF (SMAD3) in the bait list, the literature mining process identified an additional 116 CRC-associated TFs. Our network-based analysis showed that these TFs all belonged to any of 13 major functional groups that are known to play important roles in CRC. Among these identified TFs, we obtained a novel six-node module consisting of ATF2-P53-JNK1-ELK1-EPHB2-HIF1A, from which the novel JNK1-ELK1 association could potentially be a significant marker for CRC.
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Affiliation(s)
- Meeta P Pradhan
- School of Informatics, Indiana University Purdue University Indianapolis, Indianapolis, IN 46202, USA
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263
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Genetic and epigenetic events generate multiple pathways in colorectal cancer progression. PATHOLOGY RESEARCH INTERNATIONAL 2012; 2012:509348. [PMID: 22888469 PMCID: PMC3409552 DOI: 10.1155/2012/509348] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2012] [Revised: 05/15/2012] [Accepted: 05/21/2012] [Indexed: 12/13/2022]
Abstract
Colorectal cancer (CRC) is one of the most common causes of death, despite decades of research. Initially considered as a disease due to genetic mutations, it is now viewed as a complex malignancy because of the involvement of epigenetic abnormalities. A functional equivalence between genetic and epigenetic mechanisms has been suggested in CRC initiation and progression. A hallmark of CRC is its pathogenetic heterogeneity attained through at least three distinct pathways: a traditional (adenoma-carcinoma sequence), an alternative, and more recently the so-called serrated pathway. While the alternative pathway is more heterogeneous and less characterized, the traditional and serrated pathways appear to be more homogeneous and clearly distinct. One unsolved question in colon cancer biology concerns the cells of origin and from which crypt compartment the different pathways originate. Based on molecular and pathological evidences, we propose that the traditional and serrated pathways originate from different crypt compartments explaining their genetic/epigenetic and clinicopathological differences. In this paper, we will discuss the current knowledge of CRC pathogenesis and, specifically, summarize the role of genetic/epigenetic changes in the origin and progression of the multiple CRC pathways. Elucidation of the link between the molecular and clinico-pathological aspects of CRC would improve our understanding of its etiology and impact both prevention and treatment.
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264
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Colas C, Coulet F, Svrcek M, Collura A, Fléjou JF, Duval A, Hamelin R. Lynch or not Lynch? Is that always a question? Adv Cancer Res 2012; 113:121-66. [PMID: 22429854 DOI: 10.1016/b978-0-12-394280-7.00004-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The familial cancer syndrome referred to as Lynch I and II was renamed hereditary nonpolyposis colorectal cancer (HNPCC) only to revert later to Lynch syndrome (LS). LS is the most frequent human predisposition for the development of colorectal cancer (CRC), and probably also for endometrial and gastric cancers, although it has yet to acquire a consensus name. Its estimated prevalence ranges widely from 2% to 7% of all CRCs due to the fact that tumors from patients with LS are difficult to recognize at both the clinical and molecular level. This review is based on two assumptions. First, all LS patients inherit a predisposition to develop CRC (without polyposis) and/or other tumors from the Lynch spectrum. Second, all LS patients have a germline defect in one of the DNA mismatch repair (MMR) genes. When a somatic second hit inactivates the relevant MMR gene, the consequence is instability of DNA repeat sequences such as microsatellites and the tumors are referred to as having the microsatellite instability (MSI) phenotype. However, some of the inherited predisposition to develop CRC without concurrent polyposis, termed HNPCC, is found in non-LS patients, while not all MSI tumors are from LS cases. LS tumors are therefore at the junction of inherited and MSI cases. We describe here the defining characteristics of LS tumors that differentiate them from inherited non-MSI tumors and from non-inherited MSI tumors.
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Affiliation(s)
- Chrystelle Colas
- INSERM, UMRS 938, Centre de Recherche Saint-Antoine, Equipe Instabilité des Microsatellites et Cancers, Paris, France
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Abstract
One hundred years ago, decades before the discovery of the structure of DNA, debate raged regarding how human traits were passed from one generation to the next. Phenotypes, including risk of disease, had long been recognized as having a familial component. Yet it was difficult to reconcile genetic segregation as described by Mendel with observations exhaustively documented by Karl Pearson and others regarding the normal distribution of human characteristics. In 1918, R. A. Fisher published his landmark article, "The Correlation Between Relatives on the Supposition of Mendelian Inheritance," bridging this divide and demonstrating that multiple alleles, all individually obeying Mendel's laws, account for the phenotypic variation observed in nature.Since that time, geneticists have sought to identify the link between genotype and phenotype. Trait-associated alleles vary in their frequency and degree of penetrance. Some minor alleles may approach a frequency of 50% in the human population, whereas others are present within only a few individuals. The spectrum for penetrance is similarly wide. These characteristics jointly determine the segregation pattern of a given trait, which, in turn, determine the method used to map the trait. Until recently, identification of rare, highly penetrant alleles was most practical. Revolutionary studies in genomics reported over the past decade have made interrogation of most of the spectrum of genetic variation feasible.The following article reviews recent discoveries in the genetic basis of inherited cancer risk and how these discoveries inform cancer biology and patient management. Although this article focuses on prostate cancer, the principles are generic for any cancer and, indeed, for any trait.
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266
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Cicek MS, Cunningham JM, Fridley BL, Serie DJ, Bamlet WR, Diergaarde B, Haile RW, Le Marchand L, Krontiris TG, Younghusband HB, Gallinger S, Newcomb PA, Hopper JL, Jenkins MA, Casey G, Schumacher F, Chen Z, DeRycke MS, Templeton AS, Winship I, Green RC, Green JS, Macrae FA, Parry S, Young GP, Young JP, Buchanan D, Thomas DC, Bishop DT, Lindor NM, Thibodeau SN, Potter JD, Goode EL. Colorectal cancer linkage on chromosomes 4q21, 8q13, 12q24, and 15q22. PLoS One 2012; 7:e38175. [PMID: 22675446 PMCID: PMC3364975 DOI: 10.1371/journal.pone.0038175] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2012] [Accepted: 05/01/2012] [Indexed: 12/19/2022] Open
Abstract
A substantial proportion of familial colorectal cancer (CRC) is not a consequence of known susceptibility loci, such as mismatch repair (MMR) genes, supporting the existence of additional loci. To identify novel CRC loci, we conducted a genome-wide linkage scan in 356 white families with no evidence of defective MMR (i.e., no loss of tumor expression of MMR proteins, no microsatellite instability (MSI)-high tumors, or no evidence of linkage to MMR genes). Families were ascertained via the Colon Cancer Family Registry multi-site NCI-supported consortium (Colon CFR), the City of Hope Comprehensive Cancer Center, and Memorial University of Newfoundland. A total of 1,612 individuals (average 5.0 per family including 2.2 affected) were genotyped using genome-wide single nucleotide polymorphism linkage arrays; parametric and non-parametric linkage analysis used MERLIN in a priori-defined family groups. Five lod scores greater than 3.0 were observed assuming heterogeneity. The greatest were among families with mean age of diagnosis less than 50 years at 4q21.1 (dominant HLOD = 4.51, α = 0.84, 145.40 cM, rs10518142) and among all families at 12q24.32 (dominant HLOD = 3.60, α = 0.48, 285.15 cM, rs952093). Among families with four or more affected individuals and among clinic-based families, a common peak was observed at 15q22.31 (101.40 cM, rs1477798; dominant HLOD = 3.07, α = 0.29; dominant HLOD = 3.03, α = 0.32, respectively). Analysis of families with only two affected individuals yielded a peak at 8q13.2 (recessive HLOD = 3.02, α = 0.51, 132.52 cM, rs1319036). These previously unreported linkage peaks demonstrate the continued utility of family-based data in complex traits and suggest that new CRC risk alleles remain to be elucidated.
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Affiliation(s)
- Mine S. Cicek
- Departments of Health Sciences Research, Laboratory Medicine and Pathology, and Medical Genetics, Mayo Clinic College of Medicine, Rochester, Minnesota, United States of America
| | - Julie M. Cunningham
- Departments of Health Sciences Research, Laboratory Medicine and Pathology, and Medical Genetics, Mayo Clinic College of Medicine, Rochester, Minnesota, United States of America
| | - Brooke L. Fridley
- Departments of Health Sciences Research, Laboratory Medicine and Pathology, and Medical Genetics, Mayo Clinic College of Medicine, Rochester, Minnesota, United States of America
| | - Daniel J. Serie
- Departments of Health Sciences Research, Laboratory Medicine and Pathology, and Medical Genetics, Mayo Clinic College of Medicine, Rochester, Minnesota, United States of America
| | - William R. Bamlet
- Departments of Health Sciences Research, Laboratory Medicine and Pathology, and Medical Genetics, Mayo Clinic College of Medicine, Rochester, Minnesota, United States of America
| | - Brenda Diergaarde
- Department of Epidemiology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Robert W. Haile
- Department of Preventive Medicine, University of Southern California, Los Angeles, California, United States of America
| | - Loic Le Marchand
- University of Hawaii Cancer Center, Honolulu, Hawaii, United States of America
| | - Theodore G. Krontiris
- Department of Molecular Medicine, Beckman Research Institute of the City of Hope, Duarte, California, United States of America
| | | | - Steven Gallinger
- Department of Surgery, University of Toronto, Toronto, Ontario, Canada
| | - Polly A. Newcomb
- Cancer Prevention Program, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - John L. Hopper
- Departments of Public Health and Medicine, University of Melbourne, Victoria, Australia
| | - Mark A. Jenkins
- Departments of Public Health and Medicine, University of Melbourne, Victoria, Australia
| | - Graham Casey
- Department of Preventive Medicine, University of Southern California, Los Angeles, California, United States of America
| | - Fredrick Schumacher
- Department of Preventive Medicine, University of Southern California, Los Angeles, California, United States of America
| | - Zhu Chen
- Department of Preventive Medicine, University of Southern California, Los Angeles, California, United States of America
| | - Melissa S. DeRycke
- Departments of Health Sciences Research, Laboratory Medicine and Pathology, and Medical Genetics, Mayo Clinic College of Medicine, Rochester, Minnesota, United States of America
| | - Allyson S. Templeton
- Cancer Prevention Program, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - Ingrid Winship
- Departments of Public Health and Medicine, University of Melbourne, Victoria, Australia
| | - Roger C. Green
- Faculty of Medicine, Memorial University of Newfoundland, St. Johns, Newfoundland, Canada
| | - Jane S. Green
- Faculty of Medicine, Memorial University of Newfoundland, St. Johns, Newfoundland, Canada
| | - Finlay A. Macrae
- Colorectal Medicine and Genetics and Department of Medicine, University of Melbourne, The Royal Melbourne Hospital, Victoria, Australia
| | - Susan Parry
- New Zealand Familial GI Cancer Registry, Auckland City Hospital, Auckland, New Zealand
- Department of Gastroenterology, Middlemore Hospital, Auckland, New Zealand
| | - Graeme P. Young
- Flinders Centre for Cancer Prevention and Control, Flinders University, Adelaide, Australia
| | - Joanne P. Young
- Familial Cancer Laboratory, Queensland Institute of Medical Research, Queensland, Australia
| | - Daniel Buchanan
- Familial Cancer Laboratory, Queensland Institute of Medical Research, Queensland, Australia
| | - Duncan C. Thomas
- Department of Preventive Medicine, University of Southern California, Los Angeles, California, United States of America
| | - D. Timothy Bishop
- University of Leeds, Leeds Institute of Molecular Medicine, Leeds, United Kingdom
| | - Noralane M. Lindor
- Departments of Health Sciences Research, Laboratory Medicine and Pathology, and Medical Genetics, Mayo Clinic College of Medicine, Rochester, Minnesota, United States of America
| | - Stephen N. Thibodeau
- Departments of Health Sciences Research, Laboratory Medicine and Pathology, and Medical Genetics, Mayo Clinic College of Medicine, Rochester, Minnesota, United States of America
| | - John D. Potter
- Cancer Prevention Program, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
- Centre for Public Health Research, Massey University, Wellington, New Zealand
| | - Ellen L. Goode
- Departments of Health Sciences Research, Laboratory Medicine and Pathology, and Medical Genetics, Mayo Clinic College of Medicine, Rochester, Minnesota, United States of America
- * E-mail:
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267
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Chiacchiera F, Grossi V, Cappellari M, Peserico A, Simonatto M, Germani A, Russo S, Moyer MP, Resta N, Murzilli S, Simone C. Blocking p38/ERK crosstalk affects colorectal cancer growth by inducing apoptosis in vitro and in preclinical mouse models. Cancer Lett 2012; 324:98-108. [PMID: 22579651 DOI: 10.1016/j.canlet.2012.05.006] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2012] [Revised: 05/02/2012] [Accepted: 05/03/2012] [Indexed: 02/08/2023]
Abstract
We recently demonstrated that p38α is required to maintain colorectal cancer (CRC) metabolism, as its inhibition leads to FoxO3A activation, autophagy, cell death, and tumor growth reduction both in vitro and in vivo. Here we show that inhibition of p38α is followed by TRAIL-mediated activation of caspase-8 and FoxO3A-dependent HER3 upregulation with consequent overactivation of the MEK-ERK1/2 survival pathway. p38α and MEK combined inhibition specifically induces apoptosis by enabling TRAIL signaling propagation through t-Bid and caspase-3, and fosters cell death in CRC cells and preclinical mouse models. Current MEK1-directed pharmacological strategies could thus be exploited, in combination with p38α inhibition, to develop new approaches for CRC treatment.
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Affiliation(s)
- Fulvio Chiacchiera
- Laboratory of Signal-Dependent Transcription, Dept. of Translational Pharmacology, Consorzio Mario Negri Sud, Santa Maria Imbaro (CH) 66030, Italy.
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Gonzalez RS, Shulman SC, Katzenstein HM, Steelman CK, Wulkan ML, Abramowsky CR, Cohen C, Davis GK, Shehata BM. Colorectal adenocarcinoma: a pediatric case review with a focus on mismatch repair gene mutations and E-cadherin expression. Pediatr Dev Pathol 2012; 15:192-8. [PMID: 21985494 DOI: 10.2350/11-04-1015-oa.1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Colorectal adenocarcinoma (CRAC) is exceedingly rare in the pediatric population (fewer than 2 cases per 1 million children). There are 2 major categories of pediatric colorectal adenocarcinoma syndromes: polyposis-related and hereditary nonpolyposis colorectal cancer, also known as Lynch syndrome. Germ line mutations in DNA mismatch repair (MMR) genes (eg, MLH1, MSH2, PMS2, MSH6) have been established as the molecular genetic basis of Lynch syndrome. Another prognostic factor in adult CRAC is the reduced expression of epithelial cadherin (E-cadherin), which has been associated with poor outcome in some adult CRAC cases; however, its role in predicting prognoses in pediatric cases remains unclear. Seven pediatric patients with primary CRAC were reviewed. Available molecular genetic test results were evaluated, and immunohistochemical labeling for MMR proteins and E-cadherin were performed on 5 patients. Four of the 5 patients in our study with available paraffin blocks showed loss of MMR protein expression, consistent with Lynch syndrome. In cases stained for E-cadherin, 3 were strongly positive and 2 were weakly positive; however, with the small sample size and the relatively short follow-up period, an accurate correlation between E-cadherin and prognosis cannot be reached with any degree of certainty. Our findings highlight the importance of genetic testing for MMR gene mutations in children with colorectal cancer and suggest further investigation into the prognostic role of E-cadherin in pediatric CRAC.
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Affiliation(s)
- Raul S Gonzalez
- Department of Pathology, Emory University, Atlanta, GA 30322, USA
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269
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[Coexistence of Peutz-Jeghers' syndrome and Lynch's syndrome in the same patient]. GASTROENTEROLOGIA Y HEPATOLOGIA 2012; 35:395-9. [PMID: 22516349 DOI: 10.1016/j.gastrohep.2012.01.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2011] [Revised: 01/13/2012] [Accepted: 01/19/2012] [Indexed: 11/22/2022]
Abstract
Peutz-Jeghers' syndrome is an uncommon polyposis syndrome characterized by the presence of hamartomatous polyps in the gastrointestinal tract and mucocutaneous pigmentation (especially in the oral-nasal and perianal areas and hands and feet). Inheritance is autosomal dominant, caused by a germline mutation in the STK11 (LKB1) gene. The risk of breast and gastrointestinal cancer is increased in this syndrome. Lynch's syndrome is also known as hereditary non-polyposis colorectal cancer. This syndrome is caused by a mutation in DNA mismatch repair genes and increases the risk of colon and endometrial cancer, as well as that of other neoplasms (ovary, upper urological tract, gastric, small intestine, pancreas, skin and brain). We present the case of a young woman with colorectal cancer and the coexistence of both syndromes. This association has not previously been reported in the literature.
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270
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Garza-González E, Ríos M, Bosques-Padilla FJ, Francois F, Cho I, González GM, Pérez-Pérez GI. Immune response againstStreptococcus gallolyticusin patients with adenomatous polyps in colon. Int J Cancer 2012; 131:2294-9. [DOI: 10.1002/ijc.27511] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2011] [Accepted: 02/09/2012] [Indexed: 12/27/2022]
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271
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Abstract
Human Monoglyceride Lipase (MGL) is a recently identified lipase and very little is known about its regulation and function in cellular regulatory processes, particularly in context to human malignancy. In this study, we investigated the regulation and function of Monoglyceride Lipase in human cancer(s) and report that MGL expression was either absent or reduced in the majority of primary colorectal cancers. Immunohistochemical studies showed that reduction of MGL expression in the colorectal tumor tissues predominantly occurred in the cancerous epithelial cells. MGL was found to reside in the core surface of a cellular organelle named “lipid body”. Furthermore, it was found to selectively interact with a number of phospholipids including phosphotidic acid and phosphoinositol(3,4,5)P3, phosphoinositol(3,5)P2, phosphoinositol(3,4)P2 and several other phosphoinositides, and among all phosphoinositides analyzed, its interaction with PI(3,4,5)P3 was found to be the strongest. In addition, overexpression of MGL suppressed colony formation in tumor cell lines and knockdown of MGL resulted in increased Akt phosphorylation. Together, our results suggest that MGL plays a negative regulatory role in PI3-K/Akt signaling and tumor cell growth.
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272
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Boleij A, Tjalsma H. Gut bacteria in health and disease: a survey on the interface between intestinal microbiology and colorectal cancer. Biol Rev Camb Philos Soc 2012; 87:701-30. [PMID: 22296522 DOI: 10.1111/j.1469-185x.2012.00218.x] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A healthy human body contains at least tenfold more bacterial cells than human cells and the most abundant and diverse microbial community resides in the intestinal tract. Intestinal health is not only maintained by the human intestine itself and by dietary factors, but is also largely supported by this resident microbial community. Conversely, however, a large body of evidence supports a relationship between bacteria, bacterial activities and human colorectal cancer. Symbiosis in this multifaceted organ is thus crucial to maintain a healthy balance within the host-diet-microbiota triangle and accordingly, changes in any of these three factors may drive a healthy situation into a state of disease. In this review, the factors that sustain health or drive this complex intestinal system into dysbiosis are discussed. Emphasis is on the role of the intestinal microbiota and related mechanisms that can drive the initiation and progression of sporadic colorectal cancer (CRC). These mechanisms comprise the induction of pro-inflammatory and pro-carcinogenic pathways in epithelial cells as well as the production of (geno)toxins and the conversion of pro-carcinogenic dietary factors into carcinogens. A thorough understanding of these processes will provide leads for future research and may ultimately aid in development of new strategies for CRC diagnosis and prevention.
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Affiliation(s)
- Annemarie Boleij
- Department of Laboratory Medicine, Nijmegen Institute for Infection, Inflammation and Immunity (N4i) & Radboud University Centre for Oncology (RUCO) of the Radboud University Nijmegen Medical Centre, P.O. Box 9101, 6500 HB Nijmegen, the Netherlands
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273
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Abstract
Pancreatic cancer is the fourth leading cause of cancer death in both men and women in the United States. However, it has the poorest prognosis of any major tumor type, with a 5-yr survival rate of approximately 5%. Cigarette smoking, increased body mass index, heavy alcohol consumption, and a diagnosis of diabetes mellitus have all been demonstrated to increase risk of pancreatic cancer. A family history of pancreatic cancer has also been associated with increased risk suggesting inherited genetic factors also play an important role, with approximately 5-10% of pancreatic cancer patients reporting family history of pancreatic cancer. While the genetic basis for the majority of the familial clustering of pancreatic cancer remains unclear, several important pancreatic cancer genes have been identified. These consist of high penetrance genes including BRCA2 or PALB2, to more common genetic variation associated with a modest increase risk of pancreatic cancer such as genetic variation at the ABO blood group locus. Recent advances in genotyping and genetic sequencing have accelerated the rate at which novel pancreatic cancer susceptibility genes have been identified with several genes identified within the past few years. This review addresses our current understanding of the familial aggregation of pancreatic cancer, established pancreatic cancer susceptablity genes and how this knowledge informs risk assessment and screening for high-risk families.
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Affiliation(s)
- Alison P Klein
- Department of Oncology and Pathology, Sol Goldman Pancreatic Cancer Research Center, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland 21231, USA
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274
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Pounds N, Skapek SX. Desmoid-type fibromatosis in children: a step forward in the cooperative group setting. Am Soc Clin Oncol Educ Book 2012:593-7. [PMID: 24451802 DOI: 10.14694/edbook_am.2012.32.32] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Desmoid-type (aggressive) fibromatosis (desmoid tumor) is a soft tissue neoplasm that can occur in both children and adults. Although it is formally classified as an intermediate-grade neoplasm because of its propensity for locally invasive growth, it can lead to severe and life-threatening problems. Because metastases do not arise from desmoid tumor, therapeutic interventions have historically focused on surgery or radiation to achieve local tumor control. These approaches may be ineffective or impractical for some children. In those cases, systemic therapy with cytotoxic or noncytotoxic therapy has been used. Because of the relative rarity of this neoplasm in children, knowledge on the use of chemotherapy is based largely on anecdotal reports or retrospective series. Limited conclusions can be drawn, though, from these types of reports. In the last 10 years, two prospective phase II clinical trials of chemotherapy for children with desmoid tumor have been conducted in cooperative clinical trials centered in North America. We review the results of those clinical trials and suggest future directions for systematically approaching this disease to better define the role of chemotherapy for children with desmoid tumor.
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Affiliation(s)
- Natalie Pounds
- From the University of Texas Southwestern Medical Center and Center for Cancer and Blood Disorders, Children's Medical Center, Dallas, TX
| | - Stephen X Skapek
- From the University of Texas Southwestern Medical Center and Center for Cancer and Blood Disorders, Children's Medical Center, Dallas, TX
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275
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Win AK, Macinnis RJ, Hopper JL, Jenkins MA. Risk prediction models for colorectal cancer: a review. Cancer Epidemiol Biomarkers Prev 2011; 21:398-410. [PMID: 22169185 DOI: 10.1158/1055-9965.epi-11-0771] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Risk prediction models are important to identify individuals at high risk of developing the disease who can then be offered individually tailored clinical management, targeted screening and interventions to reduce the burden of disease. They are also useful for research purposes when attempting to identify new risk factors for the disease. In this article, we review the risk prediction models that have been developed for colorectal cancer and appraise their applicability, strengths, and weaknesses. We also discuss the factors to be considered for future development and improvement of models for colorectal cancer risk prediction. We conclude that there is no model that sufficiently covers the known risk factors for colorectal cancer that is suitable for assessment of people from across the full range of risk and that a new comprehensive model is needed.
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Affiliation(s)
- Aung Ko Win
- Centre for Molecular, Environmental, Genetic and Analytic Epidemiology, The University of Melbourne, Parkville, Victoria, Australia
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276
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Coissieux MM, Tomsic J, Castets M, Hampel H, Tuupanen S, Andrieu N, Comeras I, Drouet Y, Lasset C, Liyanarachchi S, Mazelin L, Puisieux A, Saurin JC, Scoazec JY, Wang Q, Aaltonen L, Tanner SM, de la Chapelle A, Bernet A, Mehlen P. Variants in the netrin-1 receptor UNC5C prevent apoptosis and increase risk of familial colorectal cancer. Gastroenterology 2011; 141:2039-46. [PMID: 21893118 PMCID: PMC3221775 DOI: 10.1053/j.gastro.2011.08.041] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2011] [Revised: 08/18/2011] [Accepted: 08/22/2011] [Indexed: 12/26/2022]
Abstract
BACKGROUND & AIMS Expression of the netrin-1 dependence receptor UNC5C is reduced in many colorectal tumors; mice with the UNC5C mutations have increased progression of intestinal tumors. We investigated whether specific variants in UNC5C increase risk of colorectal cancer (CRC). METHODS We analyzed the sequence of UNC5C in blood samples from 1801 patients with CRC and 4152 controls from 3 cohorts (France, United States, and Finland). Almost all cases from France and the United States had familial CRC; of the Finnish cases, 92 of 984 were familial. We analyzed whether CRC segregates with the UNC5C variant A628K in 3 families with histories of CRC. We also performed haplotype analysis to determine the origin of this variant. RESULTS Of 817 patients with familial CRC, 14 had 1 of 4 different, unreported missense variants in UNC5C. The variants p.Asp353Asn (encodes D353N), p.Arg603Cys (encodes R603C), and p.Gln630Glu (encodes Q630E) did not occur significantly more often in cases than controls. The variant p.Ala628Lys (A628K) was detected in 3 families in the French cohort (odds ratio, 8.8; Wald's 95% confidence interval, 1.47-52.93; P = .03) and in 2 families in the US cohort (odds ratio, 1.9; P = .6) but was not detected in the Finnish cohort; UNC5C A628K segregated with CRC in families. Three families with A628K had a 109-kilobase identical haplotype that spanned most of UNC5C, indicating recent origin of this variant in white subjects (14 generations; 95% confidence interval, 6-36 generations). Transfection of HEK293T cells with UNC5C-A628K significantly reduced apoptosis compared with wild-type UNC5C, measured in an assay of active caspase-3. CONCLUSIONS Inherited mutations in UNC5C prevent apoptosis and increase risk of CRC.
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Affiliation(s)
- Marie-May Coissieux
- Apoptosis, Cancer and Development Laboratory- Equipe labellisée ‘La Ligue’, UMR INSERM 1052 - CNRS 5286, University of Lyon, Centre Léon Bérard, 69008 Lyon, France
| | - Jerneja Tomsic
- Human Cancer Genetics Program, Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210, USA
| | - Marie Castets
- Apoptosis, Cancer and Development Laboratory- Equipe labellisée ‘La Ligue’, UMR INSERM 1052 - CNRS 5286, University of Lyon, Centre Léon Bérard, 69008 Lyon, France
| | - Heather Hampel
- Division of Human Genetics, Department of Internal Medicine, The Ohio State University Comprehensive Cancer Center, Columbus, OH, 43240, USA
| | - Sari Tuupanen
- Department of Medical Genetics Biomedicum Helsinki, University of Helsinki, Finland
| | | | - Ilene Comeras
- Division of Human Genetics, Department of Internal Medicine, The Ohio State University Comprehensive Cancer Center, Columbus, OH, 43240, USA
| | - Youenn Drouet
- CNRS UMR 5558; Centre Léon Bérard, Unit of Prevention and Genetic Epidemiology, Lyon, France
| | - Christine Lasset
- CNRS UMR 5558; Centre Léon Bérard, Unit of Prevention and Genetic Epidemiology, Lyon, France
| | - Sandya Liyanarachchi
- Human Cancer Genetics Program, Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210, USA
| | - Laetitia Mazelin
- Apoptosis, Cancer and Development Laboratory- Equipe labellisée ‘La Ligue’, UMR INSERM 1052 - CNRS 5286, University of Lyon, Centre Léon Bérard, 69008 Lyon, France
| | - Alain Puisieux
- UMR INSERM 1052 - CNRS 5286, Molecular Oncology, Centre Léon Bérard, University of Lyon, Lyon, France
| | - Jean-Christophe Saurin
- UMR INSERM 1052 - CNRS 5286; University of Lyon 1, Faculté Grange Blanche, Lyon, France; and Hospices Civils de Lyon, Hôpital Edouard Herriot, Service d’Anatomie Pathologique, Gastroenterologie, Lyon, France
| | - Jean-Yves Scoazec
- UMR INSERM 1052 - CNRS 5286; University of Lyon 1, Faculté Grange Blanche, Lyon, France; and Hospices Civils de Lyon, Hôpital Edouard Herriot, Service d’Anatomie Pathologique, Gastroenterologie, Lyon, France
| | - Qing Wang
- UMR INSERM 1052 - CNRS 5286, Molecular Oncology, Centre Léon Bérard, University of Lyon, Lyon, France
| | - Lauri Aaltonen
- Department of Medical Genetics Biomedicum Helsinki, University of Helsinki, Finland
| | - Stephan M Tanner
- Human Cancer Genetics Program, Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210, USA
| | - Albert de la Chapelle
- Human Cancer Genetics Program, Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210, USA
| | - Agnès Bernet
- Apoptosis, Cancer and Development Laboratory- Equipe labellisée ‘La Ligue’, UMR INSERM 1052 - CNRS 5286, University of Lyon, Centre Léon Bérard, 69008 Lyon, France
| | - Patrick Mehlen
- Apoptosis, Cancer and Development Laboratory- Equipe labellisée ‘La Ligue’, UMR INSERM 1052 - CNRS 5286, University of Lyon, Centre Léon Bérard, 69008 Lyon, France
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277
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March HN, Rust AG, Wright NA, Hoeve JT, de Ridder J, Eldridge M, van der Weyden L, Berns A, Gadiot J, Uren A, Kemp R, Arends MJ, Wessels LFA, Winton DJ, Adams DJ. Insertional mutagenesis identifies multiple networks of cooperating genes driving intestinal tumorigenesis. Nat Genet 2011; 43:1202-9. [PMID: 22057237 PMCID: PMC3233530 DOI: 10.1038/ng.990] [Citation(s) in RCA: 159] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2011] [Accepted: 10/03/2011] [Indexed: 12/11/2022]
Abstract
The evolution of colorectal cancer suggests the involvement of many genes. To identify new drivers of intestinal cancer, we performed insertional mutagenesis using the Sleeping Beauty transposon system in mice carrying germline or somatic Apc mutations. By analyzing common insertion sites (CISs) isolated from 446 tumors, we identified many hundreds of candidate cancer drivers. Comparison to human data sets suggested that 234 CIS-targeted genes are also dysregulated in human colorectal cancers. In addition, we found 183 CIS-containing genes that are candidate Wnt targets and showed that 20 CISs-containing genes are newly discovered modifiers of canonical Wnt signaling. We also identified mutations associated with a subset of tumors containing an expanded number of Paneth cells, a hallmark of deregulated Wnt signaling, and genes associated with more severe dysplasia included those encoding members of the FGF signaling cascade. Some 70 genes had co-occurrence of CIS pairs, clustering into 38 sub-networks that may regulate tumor development.
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Affiliation(s)
- H. Nikki March
- Cancer Research-UK Cambridge Research Institute, Li Ka Shing Centre, Robinson Way, Cambridge, CB2 ORE, UK
| | - Alistair G. Rust
- Experimental Cancer Genetics, Wellcome Trust Sanger Institute, Hinxton, Cambridge, CB10 1HH, UK
| | - Nicholas A. Wright
- Histopathology Unit, London Research Institute, Cancer Research UK, London WC2A 3PX, UK
| | - Jelle ten Hoeve
- Bioinformatics and Statistics Group, Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX, Amsterdam, the Netherlands
| | - Jeroen de Ridder
- Bioinformatics and Statistics Group, Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX, Amsterdam, the Netherlands
- Delft Bioinformatics Laboratory, Delft University of Technology, 2628 CD, Delft, the Netherlands
| | - Matthew Eldridge
- Cancer Research-UK Cambridge Research Institute, Li Ka Shing Centre, Robinson Way, Cambridge, CB2 ORE, UK
| | - Louise van der Weyden
- Experimental Cancer Genetics, Wellcome Trust Sanger Institute, Hinxton, Cambridge, CB10 1HH, UK
| | - Anton Berns
- Molecular Genetics, Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX, Amsterdam, the Netherlands
| | - Jules Gadiot
- Molecular Genetics, Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX, Amsterdam, the Netherlands
| | - Anthony Uren
- Molecular Genetics, Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX, Amsterdam, the Netherlands
| | - Richard Kemp
- Cancer Research-UK Cambridge Research Institute, Li Ka Shing Centre, Robinson Way, Cambridge, CB2 ORE, UK
| | - Mark J. Arends
- Department of Pathology, University of Cambridge, Addenbrooke’s Hospital, Hills Road, Cambridge, CB2 2QQ, UK
| | - Lodewyk F. A. Wessels
- Bioinformatics and Statistics Group, Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX, Amsterdam, the Netherlands
- Delft Bioinformatics Laboratory, Delft University of Technology, 2628 CD, Delft, the Netherlands
| | - Douglas J. Winton
- Cancer Research-UK Cambridge Research Institute, Li Ka Shing Centre, Robinson Way, Cambridge, CB2 ORE, UK
| | - David J. Adams
- Experimental Cancer Genetics, Wellcome Trust Sanger Institute, Hinxton, Cambridge, CB10 1HH, UK
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278
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McClellan JL, Davis JM, Steiner JL, Day SD, Steck SE, Carmichael MD, Murphy EA. Intestinal inflammatory cytokine response in relation to tumorigenesis in the Apc(Min/+) mouse. Cytokine 2011; 57:113-9. [PMID: 22056354 DOI: 10.1016/j.cyto.2011.09.027] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2011] [Revised: 08/05/2011] [Accepted: 09/28/2011] [Indexed: 02/07/2023]
Abstract
The etiology of colon cancer is a complex phenomenon that involves both genetic and environmental factors. However, only about 20% have a familial basis with the largest fraction being attributed to environmental causes that can lead to chronic inflammation. While the link between inflammation and colon cancer is well established, the temporal sequence of the inflammatory response in relation to tumorigenesis has not been characterized. We examined the timing and magnitude of the intestinal inflammatory cytokine response in relation to tumorigenesis in the Apc(Min/+) mouse. Apc(Min/+) mice and wildtype mice were sacrificed at one of 4 time-points: 8, 12, 16, and 20 weeks of age. Intestinal tissue was analyzed for polyp burden (sections 1, 4 and 5) and mRNA expression and protein concentration of MCP-1, IL-1β, IL-6 and TNF-α (sections 2 and 3). The results show that polyp burden was increased at 12, 16 and 20 weeks compared to 8 weeks (P<0.05). Gene expression (mRNA) of MCP-1, IL-1β, IL-6 and TNF-α was increased in sections 2 and 3 starting at week 12 (P<0.05), with further increases in MCP-1, IL-1β and IL-6 at 16 weeks (P<0.05). Protein concentration for these cytokines followed a similar pattern in section 3. Similarly, circulating MCP-1 was increased at 12 weeks (P<0.05) and then again at 20 weeks (P<0.05). In general, overall polyp number and abundance of large polyps were significantly correlated with the inflammatory cytokine response providing further support for a relationship between polyp progression and these markers. These data confirm the association between intestinal cytokines and tumorigenesis in the Apc(Min/+) mouse and provide new information on the timing and magnitude of this response in relation to polyp development. These findings may lead to the development of inflammatory mediators as important biomarkers for colon cancer progression. Further, these data may be relevant in the design of future investigations of therapeutic interventions to effectively target inflammatory processes in rodent models.
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Affiliation(s)
- Jamie L McClellan
- Department of Pathology, Microbiology & Immunology, School of Medicine, University of South Carolina, Columbia, SC 29209, USA.
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279
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Luévano-González A, Guzmán AQ, Ancer Rodríguez J, Ortiz López R, Rojas Martínez A, González Guerrero JF, Flores Gutiérrez JP. Analysis of DNA mismatch repair proteins expression and BRAF V600E mutation in a subset of early- and late-onset colorectal carcinoma patients in Mexico. Arch Med Res 2011; 42:457-62. [PMID: 21945875 DOI: 10.1016/j.arcmed.2011.09.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Accepted: 08/18/2011] [Indexed: 10/17/2022]
Abstract
BACKGROUND AND AIMS A third of colorectal carcinomas (CRC) affect patients <50 years of age. Fifteen percent of CRC cases with microsatellite instability are due to inherited germ-line mutations in DNA mismatch repair genes. The rest have an epigenetic hypermethylation of the MLH1 promoter in whom the BRAF V600E mutation is a common hallmark. Immunohistochemistry helps to classify colorectal cancers with 100% specificity and 92% sensitivity. We undertook this study to determine if age is a risk factor for defective MMR protein expression and BRAF mutations in our population and to compare these results with the histopathological tumor features. METHODS Immunohistochemistry for MLH1 and MSH2 and RT-PCR BRAF V600E mutation was performed on tissue specimens from 57 patients <50 years of age. Data on age, gender, tumor location, histology, depth of infiltration, and the presence of metastatic lymph nodes were collected. Forty eight patients >50 years of age were used as a control group. A statistical analysis using ANOVA, χ(2), and Spearman's rho test were performed. RESULTS Absent MMR protein expression was more prevalent in patients <50 years of age. No BRAF V600E mutations were detected in either group. Medullary and mucinous types were more prevalent among young patients, whereas intestinal type was more frequent in older patients (p = 0.0008). No differences were found regarding clinicopathological stages between groups. CONCLUSIONS We found an association between young age and defective MMR expression. No V600E BRAF mutations were detected in either group.
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Affiliation(s)
- Arturo Luévano-González
- Anatomic Pathology and Cytopathology, Hospital Universitario Dr José E. González, Monterrey, Nuevo León, Mexico
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280
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Two novel mutations in hMLH1 gene in Iranian hereditary non-polyposis colorectal cancer patients. Fam Cancer 2011; 11:13-7. [DOI: 10.1007/s10689-011-9478-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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281
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Crystal structure of the armadillo repeat domain of adenomatous polyposis coli which reveals its inherent flexibility. Biochem Biophys Res Commun 2011; 412:732-6. [PMID: 21871439 DOI: 10.1016/j.bbrc.2011.08.044] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Accepted: 08/10/2011] [Indexed: 12/23/2022]
Abstract
The conserved armadillo repeat (ARM) domain of adenomatous polyposis coli (APC) protein plays an important role in the recognition of its binding partners. In this study, we report the crystal structure of APC-ARM (residues 407-775), which was determined to 2.9 Å resolution. Our structure shows that the seven armadillo repeats of APC-ARM fold together into a compact domain, with Arm2 and Arm5 presenting some deviations from canonical armadillo repeats. There is a positively charged groove on the surface of APC-ARM, which might be the recognition site for APC-binding partners. Comparison of this structure with our previously reported structure of APC (407-751), together with normal mode analysis, reveals that the APC-ARM domain possesses a limited intrinsic flexibility. We propose that this intrinsic flexibility might be an inherent property of ARM domains in general.
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282
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Analysis of differentially expressed tumor-related genes in Peutz-Jeghers syndrome combined with colorectal carcinoma with cDNA microarrays. ACTA ACUST UNITED AC 2011. [DOI: 10.1007/s10330-011-0823-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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283
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Hong SM, Park JY, Hruban RH, Goggins M. Molecular signatures of pancreatic cancer. Arch Pathol Lab Med 2011. [PMID: 21631264 DOI: 10.1043/2010-0566-ra.1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
CONTEXT The introduction of genome- and epigenome-wide screening techniques has dramatically improved our understanding of the molecular mechanisms underlying the development of pancreatic cancer. There are now 3 recognized histologic precursors of pancreatic cancer: pancreatic intraepithelial neoplasia, intraductal papillary mucinous neoplasm, and mucinous cystic neoplasm. Each of these precursor lesions is associated with specific molecular alterations. OBJECTIVE To understand the molecular characteristics of pancreatic ductal adenocarcinoma and its precursor lesions. DATA SOURCES PubMed (US National Library of Medicine). CONCLUSIONS In this review, we briefly summarize recent research findings on the genetics and epigenetics of pancreatic cancer. In addition, we characterize these molecular alterations in the context of the histologic subtypes of pancreatic cancer.
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Affiliation(s)
- Seung-Mo Hong
- Department of Pathology, The Sol Goldman Pancreatic Cancer Research Center, Johns Hopkins Medical Institutions, Baltimore, Maryland, USA
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284
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Zhang Z, Chen L, Gao L, Lin K, Zhu L, Lu Y, Shi X, Gao Y, Zhou J, Xu P, Zhang J, Wu G. Structural basis for the recognition of Asef by adenomatous polyposis coli. Cell Res 2011; 22:372-86. [PMID: 21788986 DOI: 10.1038/cr.2011.119] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Adenomatous polyposis coli (APC) regulates cell-cell adhesion and cell migration through activating the APC-stimulated guanine nucleotide-exchange factor (GEF; Asef), which is usually autoinhibited through the binding between its Src homology 3 (SH3) and Dbl homology (DH) domains. The APC-activated Asef stimulates the small GTPase Cdc42, which leads to decreased cell-cell adherence and enhanced cell migration. In colorectal cancers, truncated APC constitutively activates Asef and promotes cancer cell migration and angiogenesis. Here, we report crystal structures of the human APC/Asef complex. We find that the armadillo repeat domain of APC uses a highly conserved surface groove to recognize the APC-binding region (ABR) of Asef, conformation of which changes dramatically upon binding to APC. Key residues on APC and Asef for the complex formation were mutated and their importance was demonstrated by binding and activity assays. Structural superimposition of the APC/Asef complex with autoinhibited Asef suggests that the binding between APC and Asef might create a steric clash between Asef-DH domain and APC, which possibly leads to a conformational change in Asef that stimulates its GEF activity. Our structures thus elucidate the molecular mechanism of Asef recognition by APC, as well as provide a potential target for pharmaceutical intervention against cancers.
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Affiliation(s)
- Zhenyi Zhang
- State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai 200240, China
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285
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Rizzo A, Pallone F, Monteleone G, Fantini MC. Intestinal inflammation and colorectal cancer: A double-edged sword? World J Gastroenterol 2011; 17:3092-100. [PMID: 21912451 PMCID: PMC3158408 DOI: 10.3748/wjg.v17.i26.3092] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2010] [Revised: 09/30/2010] [Accepted: 10/07/2010] [Indexed: 02/06/2023] Open
Abstract
Chronic inflammation is thought to be the leading cause of many human cancers including colorectal cancer (CRC). Accordingly, epidemiologic and clinical studies indicate that patients affected by ulcerative colitis and Crohn’s disease, the two major forms of inflammatory bowel disease, have an increased risk of developing CRC. In recent years, the role of immune cells and their products have been shown to be pivotal in initiation and progression of colitis-associated CRC. On the other hand, activation of the immune system has been shown to cause dysplastic cell elimination and cancer suppression in other settings. Clinical and experimental data herein reviewed, while confirming chronic inflammation as a risk factor for colon carcinogenesis, do not completely rule out the possibility that under certain conditions the chronic activation of the mucosal immune system might protect from colonic dysplasia.
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286
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CLC and IFNAR1 are differentially expressed and a global immunity score is distinct between early- and late-onset colorectal cancer. Genes Immun 2011; 12:653-62. [PMID: 21716316 DOI: 10.1038/gene.2011.43] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Colorectal cancer (CRC) incidence increases with age, and early onset of the disease is an indication of genetic predisposition, estimated to cause up to 30% of all cases. To identify genes associated with early-onset CRC, we investigated gene expression levels within a series of young patients with CRCs who are not known to carry any hereditary syndromes (n=24; mean 43 years at diagnosis), and compared this with a series of CRCs from patients diagnosed at an older age (n=17; mean 79 years). Two individual genes were found to be differentially expressed between the two groups, with statistical significance; CLC was higher and IFNAR1 was less expressed in early-onset CRCs. Furthermore, genes located at chromosome band 19q13 were found to be enriched significantly among the genes with higher expression in the early-onset samples, including CLC. An elevated immune content within the early-onset group was observed from the differentially expressed genes. By application of outlier statistics, H3F3A was identified as a top candidate gene for a subset of the early-onset CRCs. In conclusion, CLC and IFNAR1 were identified to be overall differentially expressed between early- and late-onset CRC, and are important in the development of early-onset CRC.
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287
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Abstract
Epigenetic information can be passed on from one generation to another via DNA methylation, histone modifications, and changes in small RNAs, a process called epigenetic memory. During a mammal’s lifecycle epigenetic reprogramming, or the resetting of most epigenetic marks, occurs twice. The first instance of reprogramming occurs in primordial germ cells and the second occurs following fertilization. These processes may be both passive and active. In order for epigenetic inheritance to occur the epigenetic modifications must be able to escape reprogramming. There are several examples supporting this non-Mendelian mechanism of inheritance including the prepacking of early developmental genes in histones instead of protamines in sperm, genomic imprinting via methylation marks, the retention of CenH3 in mammalian sperm and the inheritance of piwi-associated interfering RNAs. The ability of mammals to pass on epigenetic information to their progeny provides clear evidence that inheritance is not restricted to DNA sequence and epigenetics plays a key role in producing viable offspring.
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Affiliation(s)
- Zoë Migicovsky
- Department of Biological Sciences, University of Lethbridge Lethbridge, AB, Canada
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288
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Abstract
For decades, physicians and researchers have recognized that family history is a significant risk factor for prostate cancer. The identification of the genes responsible for inherited risk, however, proved difficult. With the sequencing of the human genome and the completion of the initial phases of the International HapMap Project, the tools are available to scan the entire genome and find genetic markers for disease. Since 2006, more than 30 inherited variants strongly associated with prostate cancer have been reported. As the inherited component of the disease is revealed, efforts are ongoing to translate genetic findings into the clinic.
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Affiliation(s)
- Mark M Pomerantz
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
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289
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Abstract
CONTEXT The introduction of genome- and epigenome-wide screening techniques has dramatically improved our understanding of the molecular mechanisms underlying the development of pancreatic cancer. There are now 3 recognized histologic precursors of pancreatic cancer: pancreatic intraepithelial neoplasia, intraductal papillary mucinous neoplasm, and mucinous cystic neoplasm. Each of these precursor lesions is associated with specific molecular alterations. OBJECTIVE To understand the molecular characteristics of pancreatic ductal adenocarcinoma and its precursor lesions. DATA SOURCES PubMed (US National Library of Medicine). CONCLUSIONS In this review, we briefly summarize recent research findings on the genetics and epigenetics of pancreatic cancer. In addition, we characterize these molecular alterations in the context of the histologic subtypes of pancreatic cancer.
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Affiliation(s)
- Seung-Mo Hong
- Department of Pathology, The Sol Goldman Pancreatic Cancer Research Center, Johns Hopkins Medical Institutions, Baltimore, Maryland, USA
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290
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Seo GS. [The role of NF-kappaB in colon cancer]. THE KOREAN JOURNAL OF GASTROENTEROLOGY 2011; 57:3-7. [PMID: 21258194 DOI: 10.4166/kjg.2011.57.1.3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Colon cancer is the 3rd common malignancy and 4th common cause of cancer death in Korea. Recent studies have shown that abnormal inflammatory response plays a critical role in colon carcinogenesis. A striking example of connection between inflammation and cancer is NF-kappaB, in which key regulator of inflammation and immune response is associated with target for colon cancer treatment. Constitutive NF-kappaB expression in colon cancer is 40-80% in vivo as well as in vitro, and the inactivation of IKKbeta subunit can reduce tumor multiplicity. The possible mechanisms by which NF-kappaB can contribute to colon carcinogenesis include the activator of antiapoptotic gene expression, enhanced cell survival and proliferation, regulation of angiogenesis and promotion of metastasis of cancer cells. Recent insights into the role of NF-kappaB involved in colon cancer development as well as their relevance as therapeutic targets are herein discussed.
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Affiliation(s)
- Geom Seog Seo
- Department of Internal Medicine, Wonkwang University College of Medicine, Iksan, Korea.
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291
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Fearon ER. Molecular genetics of colorectal cancer. ANNUAL REVIEW OF PATHOLOGY-MECHANISMS OF DISEASE 2011; 6:479-507. [PMID: 21090969 DOI: 10.1146/annurev-pathol-011110-130235] [Citation(s) in RCA: 1221] [Impact Index Per Article: 93.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Over the past three decades, molecular genetic studies have revealed some critical mutations underlying the pathogenesis of the sporadic and inherited forms of colorectal cancer (CRC). A relatively limited number of oncogenes and tumor-suppressor genes-most prominently the APC, KRAS, and p53 genes-are mutated in a sizeable fraction of CRCs, and a larger collection of genes that are mutated in subsets of CRC have begun to be defined. Together with DNA-methylation and chromatin-structure changes, the mutations act to dysregulate conserved signaling networks that exert context-dependent effects on critical cell phenotypes, including the regulation of cellular metabolism, proliferation, differentiation, and survival. Much work remains to be done to fully understand the nature and significance of the individual and collective genetic and epigenetic defects in CRC. Some key concepts for the field have emerged, two of which are emphasized in this review. Specifically, the gene defects in CRC often target proteins and pathways that exert pleiotropic effects on the cancer cell phenotype, and particular genetic and epigenetic alterations are linked to biologically and clinically distinct subsets of CRC.
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Affiliation(s)
- Eric R Fearon
- The Cancer Center, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, 48109-2200, USA.
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292
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Gisbert JP. [Ten major publications in 2010 with implications for clinical practice in gastroenterology]. GASTROENTEROLOGIA Y HEPATOLOGIA 2011; 34:289-304. [PMID: 21474205 DOI: 10.1016/j.gastrohep.2011.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2011] [Accepted: 02/28/2011] [Indexed: 05/30/2023]
Affiliation(s)
- Javier P Gisbert
- Servicio de Aparato Digestivo, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria Princesa (IP), Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Madrid, España.
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293
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Thomson AD, Kwok R, Weltman MD. Genetic Evaluation of Polyposis. CURRENT COLORECTAL CANCER REPORTS 2011. [DOI: 10.1007/s11888-010-0073-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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294
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Abstract
Microsatellite instability (MSI) occurs in about 15% of gastrointestinal cancers and it is associated with specific clinic, pathologic, and molecular features of the tumors. MSI-high (MSI-H) carcinomas also follow specific tumor development pathways. This review is focused on the molecular profile of alterations in members of the KRAS signaling pathway (EGFR, KRAS, BRAF, PIK3CA, RASSF1A, and MLK3 genes) in MSI gastrointestinal carcinomas. Alterations in these genes characterize more than half of gastrointestinal cancers and frequently occur simultaneously in the same tumor, pinpointing the KRAS signaling pathway as one of the most frequently altered pathways in this subset of cancers. Nowadays, many and novel inhibitors targeting molecules of this signaling pathway are being described; therefore, it is worthwhile to test their efficacy in MSI gastrointestinal cancers in order to develop new and more directed targeted therapies for patients affected by this disease.
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295
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Power DG, Gloglowski E, Lipkin SM. Clinical genetics of hereditary colorectal cancer. Hematol Oncol Clin North Am 2011; 24:837-59. [PMID: 20816577 DOI: 10.1016/j.hoc.2010.06.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Colorectal cancer (CRC) is a common disease, and approximately 25% of patients have a familial component. High-penetrance singlegene germline mutations conferring a true hereditary susceptibility account for around 5% to 6% of all cases. Lynch syndrome is the most common hereditary form of colorectal cancer. Much of the hereditary component in the remaining familial cases of CRC is likely polygenic, and many of the genetic changes involved are as yet unidentified. This article addresses the most clinically important CRC genetic syndromes.
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Affiliation(s)
- Derek G Power
- Clinical Genetics, Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA
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296
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Satelli A, Rao PS, Thirumala S, Rao US. Galectin-4 functions as a tumor suppressor of human colorectal cancer. Int J Cancer 2010; 129:799-809. [PMID: 21064109 DOI: 10.1002/ijc.25750] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2010] [Revised: 09/02/2010] [Accepted: 10/04/2010] [Indexed: 12/15/2022]
Abstract
Development of colorectal cancer (CRC) involves a series of genetic alterations with altered expression of proteins and cell signaling pathways. Here, we identified that galectin-4 (gal-4), a marker of differentiation, was down-regulated in CRC. The goal of this work was to determine the function of gal-4 in CRC. Toward this goal, the human colon biopsies and tissue microarrays containing a gradient of pathology were analyzed for gal-4 expression by immunohistochemistry. Cell proliferation, migration, motility, forced expression, knockdown, cell cycle and apoptosis assays were used to characterize gal-4 function. Immunohistochemistry identified that gal-4 expression was significantly down-regulated in adenomas and was essentially absent in invasive carcinomas. Forced expression of gal-4 in gal-4 -ve cells induced cell cycle arrest and retarded cell migration and motility. Further, gal-4 sensitized the cells to camptothecin-induced apoptosis. Gal-4 knockdown resulted in increased cell proliferation, migration and motility. Gal-4 was found to be associated with Wnt signaling proteins. Finally, gal-4 expression led to down-regulation of Wnt signaling target genes. This study demonstrates that loss of gal-4 is a common and specific event in CRC. This study also shows that gal-4 exhibits tumor suppressive effects in CRC cells in vitro. Through its ability to interact with and down-regulate the functions of Wnt signaling pathway, gal-4 reveals a new dimension in the control of the Wnt signaling pathway. Thus, gal-4 may prove to be an important molecule in understanding the biology of CRC.
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Affiliation(s)
- Arun Satelli
- Department of Biomedical Sciences, Texas Tech University Health Sciences Center, Amarillo, TX 79106, USA
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297
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Wang JJ, Zheng Y, Sun L, Wang L, Yu PB, Dong JH, Zhang L, Xu J, Shi W, Ren YC. TP53 codon 72 polymorphism and colorectal cancer susceptibility: a meta-analysis. Mol Biol Rep 2010; 38:4847-53. [PMID: 21140221 DOI: 10.1007/s11033-010-0619-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2010] [Accepted: 11/26/2010] [Indexed: 02/07/2023]
Abstract
Colorectal cancer constitutes a significant proportion of the global burden of cancer morbidity and mortality. A number of studies have been conducted to explore whether TP53 codon 72 polymorphism is associated with colorectal cancer susceptibility. However, controversial results were obtained. In order to derive a more precise estimation of the relationship, we systematically searched Medline, Google scholar, and Ovid database for studies reported before May 2010. A total of 3603 colorectal cancer cases and 5524 controls were included. TP53 codon 72 polymorphism was not associated with colorectal cancer risk in all genetic models (for dominant model: OR = 0.99, 95% CI: 0.86-1.15; for recessive model: OR = 1.00, 95% CI: 0.81-1.23; for Arg/Pro vs. Arg/Arg: OR = 1.00, 95% CI: 0.87-1.15; for Pro/Pro vs. Arg/Arg: OR = 0.97, 95% CI: 0.76-1.25). In the subgroup analyses by ethnic groups and sources of controls, no significant associations were found in all models. Taken together, this meta-analysis suggested that the biologically usefulness of TP53 codon 72 polymorphism as a selection marker in colorectal cancer susceptibility may be very limited.
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Affiliation(s)
- Jing-Jun Wang
- Department of Center for Disease Control and Prevention of Shaanxi Province, 3 Jiandong Road, 710043 Xi'an, Shaanxi, People's Republic of China
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298
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Adán L, Álvarez-Castro A, Castells A. Aproximación al cáncer colorrectal familiar. GASTROENTEROLOGIA Y HEPATOLOGIA 2010; 33:652-9. [DOI: 10.1016/j.gastrohep.2009.11.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2009] [Accepted: 11/27/2009] [Indexed: 12/26/2022]
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299
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Terdiman JP, McQuaid KR. Surveillance guidelines should be updated to recognize the importance of serrated polyps. Gastroenterology 2010; 139:1444-7. [PMID: 20875785 DOI: 10.1053/j.gastro.2010.09.024] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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300
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Erreni M, Mantovani A, Allavena P. Tumor-associated Macrophages (TAM) and Inflammation in Colorectal Cancer. CANCER MICROENVIRONMENT 2010; 4:141-54. [PMID: 21909876 DOI: 10.1007/s12307-010-0052-5] [Citation(s) in RCA: 252] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2010] [Accepted: 08/06/2010] [Indexed: 12/19/2022]
Abstract
Experimental and epidemiological studies indicate a strong link between chronic inflammation and tumor progression. Human colorectal cancer (CRC), a major cause of cancer-related death in Western countries, represents a paradigm for this link. Key features of cancer-related inflammation in CRC are the activation of transcription factors (e.g. NF-κB, STAT3), the expression of inflammatory cytokines and chemokines (e.g. TNFα, IL-6, CCL2, CXCL8) as well as a prominent leukocyte infiltrate. While considerable evidence indicates that the presence of lymphocytes of adaptive immunity may positively influence patient survival and clinical outcome in CRC, the role of tumor-associated macrophages (TAM) and of other lymphoid populations (e.g. Th17, Treg) is still unclear. In this review we will summarize the different and controversial effects that TAM play in CRC-related inflammation and progression of disease. The characterization of the most relevant inflammatory pathways in CRC is instrumental for the identification of new target molecules that could lead to improved diagnosis and treatment.
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Affiliation(s)
- Marco Erreni
- Department of Immunology and Inflammation, IRCCS Istituto Clinico Humanitas, Via Manzoni, 56, Rozzano, Milan, Italy
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