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Lu J, Jin Z, Jin X, Chen W. Prognostic value and potential regulatory relationship of miR-200c-5p in colorectal cancer. J Biochem Mol Toxicol 2024; 38:e23770. [PMID: 39016041 DOI: 10.1002/jbt.23770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 05/23/2024] [Accepted: 07/05/2024] [Indexed: 07/18/2024]
Abstract
This study aimed to investigate the relationship and potential mechanisms of miR-200c-5p in colorectal cancer (CRC) progression. Differentially expressed miRNAs were screened using the TCGA database. Subsequently, univariate analysis was performed to identify CRC survival-related miRNAs. Survival and receiver operator characteristic curves were generated. The target genes of miR-200c-5p and the relevant signaling pathways or biological processes were predicted by the miRNet database and enrichment analyses. The miR-200c-5p expression was detected using quantitative reverse-transcription polymerase chain reaction, Cell Counting Kit-8, Transwell, and cell apoptosis experiments were performed to determine miR-200c-5p's impact on CRC cell viability, invasiveness, and apoptosis. Finally, we constructed a CRC mouse model with inhibited miR-200c-5p to evaluate its impact on tumors. miR-200c-5p was upregulated in CRC, implying a favorable prognosis. Gene set enrichment analysis revealed that miR-200c-5p may participate in signaling pathways such as the TGF-β signaling pathway, RIG-I-like receptor signaling pathway, renin-angiotensin system, and DNA replication. miR-200c-5p potentially targeted mRNAs, including KCNE4 and CYP1B1, exhibiting a negative correlation with their expression. Furthermore, these mRNAs may participate in biological processes like the regulation of intracellular transport, cAMP-dependent protein kinase regulatory activity, ubiquitin protein ligase binding, MHC class II protein complex binding, and regulation of apoptotic signaling pathway. Lastly, miR-200c-5p overexpression repressed the viability and invasiveness of CRC cells but promoted apoptosis. The tumor size, weight, and volume were significantly increased by inhibiting miR-200c-5p (p < 0.05). miR-200c-5p is upregulated in CRC, serving as a promising biomarker for predicting CRC prognosis.
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Affiliation(s)
- Jiying Lu
- Department of Colorectal Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Department of Colorectal and Anal Surgery, The Affiliated Jinhua Hospital, Zhejiang University School of Medicine, Jinhua, China
| | - Zhekang Jin
- Department of Colorectal and Anal Surgery, The Affiliated Jinhua Hospital, Zhejiang University School of Medicine, Jinhua, China
| | - Xihan Jin
- Department of Colorectal and Anal Surgery, The Affiliated Jinhua Hospital, Zhejiang University School of Medicine, Jinhua, China
| | - Wenbin Chen
- Department of Colorectal Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
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Bi X, Wang J, Liu C. Intratumoral Microbiota: Metabolic Influences and Biomarker Potential in Gastrointestinal Cancer. Biomolecules 2024; 14:917. [PMID: 39199305 PMCID: PMC11353126 DOI: 10.3390/biom14080917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2024] [Revised: 07/21/2024] [Accepted: 07/25/2024] [Indexed: 09/01/2024] Open
Abstract
Gastrointestinal (GI) cancers impose a substantial global health burden, highlighting the necessity for deeper understanding of their intricate pathogenesis and treatment strategies. This review explores the interplay between intratumoral microbiota, tumor metabolism, and major types of GI cancers (including esophageal, gastric, liver, pancreatic, and colorectal cancers), summarizing recent studies and elucidating their clinical implications and future directions. Recent research revealed altered microbial signatures within GI tumors, impacting tumor progression, immune responses, and treatment outcomes. Dysbiosis-induced alterations in tumor metabolism, including glycolysis, fatty acid metabolism, and amino acid metabolism, play critical roles in cancer progression and therapeutic resistance. The integration of molecular mechanisms and potential biomarkers into this understanding further enhances the prognostic significance of intratumoral microbiota composition and therapeutic opportunities targeting microbiota-mediated tumor metabolism. Despite advancements, challenges remain in understanding the dynamic interactions within the tumor microenvironment (TME). Future research directions, including advanced omics technologies and prospective clinical studies, offer promising avenues for precision oncology and personalized treatment interventions in GI cancer. Overall, integrating microbiota-based approaches and molecular biomarkers into GI cancer management holds promise for improving patient outcomes and survival.
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Affiliation(s)
- Xueyuan Bi
- Department of Pharmacy, Honghui Hospital, Xi’an Jiaotong University, Xi’an 710054, China
| | - Jihan Wang
- Institute of Medical Research, Northwestern Polytechnical University, Xi’an 710072, China;
| | - Cuicui Liu
- Department of Science and Education, Honghui Hospital, Xi’an Jiaotong University, Xi’an 710054, China
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Sah DK, Arjunan A, Park SY, Lee B, Jung YD. Sulforaphane Inhibits IL-1β-Induced IL-6 by Suppressing ROS Production, AP-1, and STAT3 in Colorectal Cancer HT-29 Cells. Antioxidants (Basel) 2024; 13:406. [PMID: 38671854 PMCID: PMC11047376 DOI: 10.3390/antiox13040406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 03/22/2024] [Accepted: 03/25/2024] [Indexed: 04/28/2024] Open
Abstract
Colorectal cancer (CRC) stands as a major cause of cancer-related mortality globally, accounting for approximately 881,000 deaths each year. Traditional approaches such as chemotherapy and surgery have been the primary treatment modalities, yet the outcomes for patients with metastatic CRC are often unsatisfactory. Recent research has focused on targeting the pathways involved in oxidative stress, inflammation, and metastasis to enhance the survival of CRC patients. Within this context, sulforaphane (SFN), a notable phytochemical found predominantly in cruciferous vegetables, has been recognized as a potential anticancer agent. However, the specific mechanisms through which SFN may exert its chemopreventive effects in CRC remain unclear. This study explores the impact of SFN on IL-1β-induced IL-6 activation and MAPK and AP-1 signaling in HT-29 cells. Our findings reveal that SFN treatment not only diminishes IL-1β-stimulated IL-6 expression but also reduces oxidative stress by curtailing reactive oxygen species (ROS) production. Furthermore, it hinders the proliferation and invasiveness of HT-29 cells through the modulation of MAPK/AP-1 and STAT3 signaling pathways. These results indicate that SFN mitigates IL-1β-induced IL-6 expression in CRC cells by attenuating ROS production and disrupting MAPK/AP-1 signaling. This suggests that SFN holds significant potential as a chemotherapeutic agent for both treating and preventing CRC.
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Affiliation(s)
- Dhiraj Kumar Sah
- Department of Biochemistry, Chonnam National University Medical School, Hwasun 58128, Republic of Korea; (D.K.S.); (A.A.)
| | - Archana Arjunan
- Department of Biochemistry, Chonnam National University Medical School, Hwasun 58128, Republic of Korea; (D.K.S.); (A.A.)
| | - Seon Young Park
- Department of Internal Medicine, Chonnam National University Medical School, Gwangju 501190, Republic of Korea;
| | - Bora Lee
- Department of Biochemistry, Chonnam National University Medical School, Hwasun 58128, Republic of Korea; (D.K.S.); (A.A.)
| | - Young Do Jung
- Department of Biochemistry, Chonnam National University Medical School, Hwasun 58128, Republic of Korea; (D.K.S.); (A.A.)
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Milani N, Darband TJ, Mousa-Farkhani E, Goshayeshi L, Kabiri M. Impact of Various Risk Factors on the Positive Fecal Immunochemical Test for Colorectal Cancer in the Iranian Population. Middle East J Dig Dis 2023; 15:249-256. [PMID: 38523892 PMCID: PMC10955984 DOI: 10.34172/mejdd.2023.354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 09/09/2023] [Indexed: 03/26/2024] Open
Abstract
Background: Colorectal cancer (CRC) is the most prevalent cancer with high mortality worldwide. We aimed to evaluate the incidence of CRC based on the positive fecal immunochemical test (FIT) result in the Iranian population. Methods: The present study was conducted on the health assessment data recorded in the SINA (Integrated Health Information System) in 2018 and 2019 from individuals who had participated in the national program, including asymptomatic people aged 50-69 years or had risk factors of CRC such as family or past personal history of CRC as well as symptomatic individuals, for the early detection and prevention of CRC in Mashhad, Iran. Results: The study participants included 140,463 eligible individuals, of whom 8258 (5.88%) and 145 (2.21%) were positive for FIT and diagnosed with colon cancer, respectively. Unfortunately, only 654 people had undergone colonoscopy. Our results indicated that age, fast food intake (≥two units per day), family history of CRC in first or second-degree relatives, some gastrointestinal diseases such as inflammatory bowel disease (IBD) and CRC, as well as bleeding per anus, constipation, abdominal cramp, and losing body weight were associated with increased risk of positive FIT. However, some other factors, including having a hard job, physical activity, and Iranian nationality (compared to non-Iranians), were associated with a low risk of positive FIT screening tests for CRC. Conclusion: A high number of high-risk persons in Mashhad were positive for the FIT test in 2018-2019, and many of them were diagnosed with CRC, according to the colonoscopy results. Therefore, screening is highly recommended as the first step in the early detection of CRC.
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Affiliation(s)
- Nasrin Milani
- Department of Internal Medicine, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | | | - Ehsan Mousa-Farkhani
- Department of Epidemiology and Biostatistics, School of Health, Social Determinants of Health Research Center, Cancer Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ladan Goshayeshi
- Department of Gastroenterology and Hepatology, Faculty of Medicine, Mashhad University of Medical Science, Mashhad, Iran
| | - Mona Kabiri
- Nanotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
- Department of Pharmaceutical Nanotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
- Clinical Research Development Unit, Ghaem Hospital, Mashhad University of Medical Sciences, Mashhad, Iran
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Nguyen DD, Kim E, Le NT, Ding X, Jaiswal RK, Kostlan RJ, Nguyen TNT, Shiva O, Le MT, Chai W. Deficiency in mammalian STN1 promotes colon cancer development via inhibiting DNA repair. SCIENCE ADVANCES 2023; 9:eadd8023. [PMID: 37163605 PMCID: PMC10171824 DOI: 10.1126/sciadv.add8023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 04/05/2023] [Indexed: 05/12/2023]
Abstract
Despite the high lethality of colorectal cancers (CRCs), only a limited number of genetic risk factors are identified. The mammalian ssDNA-binding protein complex CTC1-STN1-TEN1 protects genome stability, yet its role in tumorigenesis is unknown. Here, we show that attenuated CTC1/STN1 expression is common in CRCs. We generated an inducible STN1 knockout mouse model and found that STN1 deficiency in young adult mice increased CRC incidence, tumor size, and tumor load. CRC tumors exhibited enhanced proliferation, reduced apoptosis, and elevated DNA damage and replication stress. We found that STN1 deficiency down-regulated multiple DNA glycosylases, resulting in defective base excision repair (BER) and accumulation of oxidative damage. Collectively, this study identifies STN1 deficiency as a risk factor for CRC and implicates the previously unknown STN1-BER axis in protecting colon tissues from oxidative damage, therefore providing insights into the CRC tumor-suppressing mechanism.
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Affiliation(s)
- Dinh Duc Nguyen
- Department of Cancer Biology, Cardinal Bernardin Cancer Center, Loyola University Chicago Stritch School of Medicine, Maywood, IL, USA
| | - Eugene Kim
- Department of Cancer Biology, Cardinal Bernardin Cancer Center, Loyola University Chicago Stritch School of Medicine, Maywood, IL, USA
| | - Nhat Thong Le
- School of Biotechnology, International University, Ho Chi Minh City, Vietnam
| | - Xianzhong Ding
- Department of Pathology, Loyola University Chicago Stritch School of Medicine, Maywood, IL, USA
| | - Rishi Kumar Jaiswal
- Department of Cancer Biology, Cardinal Bernardin Cancer Center, Loyola University Chicago Stritch School of Medicine, Maywood, IL, USA
| | - Raymond Joseph Kostlan
- Department of Cancer Biology, Cardinal Bernardin Cancer Center, Loyola University Chicago Stritch School of Medicine, Maywood, IL, USA
| | - Thi Ngoc Thanh Nguyen
- Department of Cancer Biology, Cardinal Bernardin Cancer Center, Loyola University Chicago Stritch School of Medicine, Maywood, IL, USA
| | - Olga Shiva
- Office of Research, Washington State University-Spokane, Spokane, WA, USA
| | - Minh Thong Le
- School of Biotechnology, International University, Ho Chi Minh City, Vietnam
| | - Weihang Chai
- Department of Cancer Biology, Cardinal Bernardin Cancer Center, Loyola University Chicago Stritch School of Medicine, Maywood, IL, USA
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Martini K. [Tobacco-associated cancer : More than just lung cancer]. RADIOLOGIE (HEIDELBERG, GERMANY) 2022; 62:758-762. [PMID: 35362727 PMCID: PMC9433355 DOI: 10.1007/s00117-022-00992-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Accepted: 02/21/2022] [Indexed: 12/24/2022]
Abstract
BACKGROUND Tobacco use is the leading preventable cause of cancer and cancer deaths. Tobacco use is not only related to lung cancer, but has an impact on a wide range of different cancer entities in almost every organ system. OBJECTIVES The aim of this review article is to shed light on the different organ systems involved in tobacco-associated carcinogenesis. MATERIALS AND METHODS For this purpose, first a brief introduction into the topic is given, followed by a detailed description of the different tumor entities associated with tobacco use. RESULTS Tobacco consumption has been clearly implicated in the causation of many types of cancer, affecting multiple organ systems. Based on current evidence, tobacco use can cause cancer of the mouth and throat, larynx, esophagus, stomach, kidney, pancreas, liver, bladder, cervix, colon and rectum, and acute myeloid leukemia. CONCLUSION Tobacco use is not only main cause in the development of lung cancer, but has a major impact in the development of cancer in other organ systems. Therefore, special attention must be given to possible concomitant malignancies when evaluating images of smokers.
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Affiliation(s)
- Katharina Martini
- Institut für Diagnostische und Interventionelle Radiologie, Universitätsspital Zürich, Rämistr. 100, 8091, Zürich, Schweiz.
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Lumish MA, Cercek A. Practical Considerations in Diagnosing and Managing Early-Onset GI Cancers. J Clin Oncol 2022; 40:2662-2680. [PMID: 35839438 PMCID: PMC9390825 DOI: 10.1200/jco.21.02708] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 03/12/2022] [Accepted: 04/18/2022] [Indexed: 12/24/2022] Open
Abstract
The incidence of early-onset (EO) GI cancers occurring in individuals younger than age 50 years has been rising at an alarming rate over the past two decades. Although this rise in incidence among young patients correlates with increased rates of obesity, changes in diet, and alterations in the environment, the effects of these environmental factors on carcinogenesis, metastasis, and treatment response are unknown. Although several unique clinical trends exist among EO-GI cancers and their average-onset GI cancer counterparts, GI cancers are molecularly indistinct between younger and older patients, and no data support distinct treatment paradigms for patients with EO disease. The majority of EO-GI cancers are not explained by germline changes. There remains a critical need for further research to understand the pathogenesis and optimal management of EO-GI cancers. In addition, current screening strategies are not adequate to identify EO-GI cancers, and early biomarkers are needed. Specialized centers, with a focus on psychosocial aspects of cancer management, can address the unique care needs of patients with EO-GI cancers.
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Affiliation(s)
- Melissa A. Lumish
- Memorial Sloan Kettering Cancer Center, Department of Medicine, New York, NY
| | - Andrea Cercek
- Memorial Sloan Kettering Cancer Center, Department of Medicine, New York, NY
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Kamarinou CS, Papadopoulou OS, Doulgeraki AI, Tassou CC, Galanis A, Chorianopoulos NG, Argyri AA. Mapping the Key Technological and Functional Characteristics of Indigenous Lactic Acid Bacteria Isolated from Greek Traditional Dairy Products. Microorganisms 2022; 10:246. [PMID: 35208701 PMCID: PMC8875946 DOI: 10.3390/microorganisms10020246] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 01/18/2022] [Accepted: 01/19/2022] [Indexed: 11/25/2022] Open
Abstract
The aim of the current study was to isolate indigenous lactic acid bacteria (LAB) from traditional Greek cheeses and assess their biochemical, technological, and functional characteristics, so as to develop novel cultures with multi-functional properties. Hence, 109 LAB isolates were recovered from traditional fresh cheeses and were evaluated in vitro for their gas production; proteolytic, lipolytic, and haemolytic activity; exopolysaccharide production (EPS); enzymatic potential; and ability to grow at 6.5% NaCl and at different pH, temperature, and anaerobic conditions. Consequently, 48 selected isolates were further evaluated for their survival under simulated gastrointestinal tract conditions, partial bile salt hydrolase activity, antibiotic resistance, and antimicrobial activity against pathogens. These isolates were also incorporated as co-cultures in yogurt production to examine their sensory characteristics and their survival in the product. Some prominent isolates that showed favorable technological and functional characteristics (good survival rates at low pH and bile salts, ability to produce β-galactosidase, and EPS) and attributed desirable sensory characteristics to yogurt were Lactococcuslactis (SRX2, SRX3, SRX5, and SMX16), Lactobacillus paracasei SRX10, and Lactiplantibacillusplantarum (FRX7, FB1), while Leuconostoc mesenteroides FMX3 and L. lactis SMX2 showed an anti-listerial activity in vitro. The results of the present study are promising for the production of novel dairy functional products with an enhanced quality and safety.
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Affiliation(s)
- Christina S. Kamarinou
- Institute of Technology of Agricultural Products, Hellenic Agricultural Organization—DIMITRA, 14123 Lycovrissi, Greece; (C.S.K.); (O.S.P.); (A.I.D.); (C.C.T.)
- Department of Molecular Biology and Genetics, Democritus University of Thrace, 68100 Alexandroupolis, Greece;
| | - Olga S. Papadopoulou
- Institute of Technology of Agricultural Products, Hellenic Agricultural Organization—DIMITRA, 14123 Lycovrissi, Greece; (C.S.K.); (O.S.P.); (A.I.D.); (C.C.T.)
| | - Agapi I. Doulgeraki
- Institute of Technology of Agricultural Products, Hellenic Agricultural Organization—DIMITRA, 14123 Lycovrissi, Greece; (C.S.K.); (O.S.P.); (A.I.D.); (C.C.T.)
| | - Chrysoula C. Tassou
- Institute of Technology of Agricultural Products, Hellenic Agricultural Organization—DIMITRA, 14123 Lycovrissi, Greece; (C.S.K.); (O.S.P.); (A.I.D.); (C.C.T.)
| | - Alex Galanis
- Department of Molecular Biology and Genetics, Democritus University of Thrace, 68100 Alexandroupolis, Greece;
| | - Nikos G. Chorianopoulos
- Institute of Technology of Agricultural Products, Hellenic Agricultural Organization—DIMITRA, 14123 Lycovrissi, Greece; (C.S.K.); (O.S.P.); (A.I.D.); (C.C.T.)
| | - Anthoula A. Argyri
- Institute of Technology of Agricultural Products, Hellenic Agricultural Organization—DIMITRA, 14123 Lycovrissi, Greece; (C.S.K.); (O.S.P.); (A.I.D.); (C.C.T.)
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Mediu N, Mediu R, Alimehmeti R. Risk Factors of Colorectal Cancer in Hospitalized Patients in Regional Hospital Durrës. Open Access Maced J Med Sci 2022. [DOI: 10.3889/oamjms.2022.7988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Introduction
Colorectal cancer (CRC) is the most common gastrointestinal cancer with an important global health problem. The study aims were to evaluate the risk factors of colorectal cancer in chirurgical ward in Regional Durres Hospital in Albania during two years.
Methods
We conducted a retrospective cohort study to explore risk factors of Colorectal Cancer at the Surgical ward of the Regional Hospital Durres is the second largest and a referral hospital center in Albania. In this paper we have collected medical records of 79 adults 18 years of age and older with primary diagnosis of CRC admitted to this hospital during the periods January 2009 until to December 2010. Data were analyzed using the statistical package for social science (SPSS) version 23.0. A p < 0.05 was accepted as statistically significant.
Results
Overall, 79 patients with CRC enrolled in our study, the male (58.2%) was the most predominant gender compared to female (41.8%) with a strong significance between them χ2 =79.0 and p value <0.0001. The average age was 69.43 ±10.6 where the minimum age resulted 42 years old and the maximum 85 years old. Patients between the age group 61-70 years old were 29.1% of CRC cases, them with age group 71-80 years old presented the higher number of CRC 34.2% of cases. A strong significance association has been seen between the age groups and presence of CRC. In multivariate logistic regression we also found a significance association for some of the other risk factor for CRC like gender, aging, marital status, education level BMI and physical activity. The p value in all these risk factor resulted <0.05.
Conclusion
The prevalence of this malignancy in our study increases after the age of 60 years. Our study findings show that the presence of CRC was in strength association with some of risk factors. But the number of our patients were low, so based on our observations, we suggest future studies should involve a large number of patients and focus on better understanding mechanisms for some of these associations and presence of CRC risk.
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Burkill S, Tan CS, Lau J, Koh GCH, Tan KK. Colorectal cancer incidence in a multi-ethnic population: Age-period-cohort analysis of trends in Singapore. Cancer Epidemiol 2021; 75:102046. [PMID: 34653790 DOI: 10.1016/j.canep.2021.102046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 09/26/2021] [Accepted: 10/03/2021] [Indexed: 11/18/2022]
Affiliation(s)
- Sarah Burkill
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore.
| | - Chuen Seng Tan
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore.
| | - Jerrald Lau
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore; Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
| | | | - Ker Kan Tan
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
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Chen X, Jansen L, Guo F, Hoffmeister M, Chang-Claude J, Brenner H. Smoking, Genetic Predisposition, and Colorectal Cancer Risk. Clin Transl Gastroenterol 2021; 12:e00317. [PMID: 33646204 PMCID: PMC7925134 DOI: 10.14309/ctg.0000000000000317] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 01/27/2021] [Indexed: 12/14/2022] Open
Abstract
INTRODUCTION Smoking and genetic predisposition are established risk factors for colorectal cancer (CRC). We aimed to assess and compare their individual and joint impact on CRC risk using the novel approach of genetic risk equivalent (GRE). METHODS Data were extracted from the Darmkrebs: Chancen der Verhütung durch Screening study, a large population-based case-control study in Germany. A polygenic risk score (PRS) based on 140 CRC-related single nucleotide polymorphisms was derived to quantify genetic risk. Multiple logistic regression was used to estimate the individual and joint impact of smoking and PRS on CRC risk, and to quantify the smoking effect in terms of GRE, the corresponding effect conveyed by a defined difference in PRS percentiles. RESULTS There were 5,086 patients with CRC and 4,120 controls included. Current smokers had a 48% higher risk of CRC than never smokers (adjusted odds ratio 1.48, 95% confidence interval 1.27-1.72). A PRS above the 90th percentile was significantly associated with a 3.6-, 4.3-, and 6.4-fold increased risk of CRC in never, former, and current smokers, respectively, when compared with a PRS below the 10th percentile in never smokers. The interaction between smoking and PRS on CRC risk did not reach statistical significance (P = 0.53). The effect of smoking was equivalent to the effect of having a 30 percentile higher level of PRS (GRE 30, 95% confidence interval 18-42). DISCUSSION Both smoking and the PRS carry essentially independent CRC risk information, and their joint consideration provides powerful risk stratification. Abstinence from smoking can compensate for a substantial proportion of genetically determined CRC risk.
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Affiliation(s)
- Xuechen Chen
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Medical Faculty Heidelberg, Heidelberg University, Heidelberg, Germany
| | - Lina Jansen
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Feng Guo
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Medical Faculty Heidelberg, Heidelberg University, Heidelberg, Germany
| | - Michael Hoffmeister
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Jenny Chang-Claude
- Unit of Genetic Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Genetic Tumor Epidemiology Group, University Medical Center Hamburg-Eppendorf, University Cancer Center Hamburg, Hamburg, Germany
| | - Hermann Brenner
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany
- German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
- Division of Preventive Oncology, German Cancer Research Center (DKFZ) and National Center for Tumor Diseases (NCT), Heidelberg, Germany
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Demirel T, Yaylim I, Ergen HA, Gunay MK, Tekant Y, Isbir T. Association of paraoxonase (PON1) polymorphisms and activity with colorectal cancer predisposition. BIOTECHNOL BIOTEC EQ 2020. [DOI: 10.1080/13102818.2020.1867006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Affiliation(s)
- Tugrul Demirel
- Department of General Surgery, School of Medicine, Trakya University, Edirne, Turkey
| | - Ilhan Yaylim
- Department of Molecular Medicine, Institute of Experimental Medicine, Istanbul University, İstanbul, Turkey
| | - Hayriye Arzu Ergen
- Department of Molecular Medicine, Institute of Experimental Medicine, Istanbul University, İstanbul, Turkey
| | - Mustafa Kayihan Gunay
- Department of General Surgery, Istanbul School of Medicine, Istanbul University, Istanbul, Turkey
| | - Yaman Tekant
- Department of General Surgery, Istanbul School of Medicine, Istanbul University, Istanbul, Turkey
| | - Turgay Isbir
- Department of Medical Biology, School of Medicine, Yeditepe University, Istanbul, Turkey
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Alqahtani MZ, Mohammed AG, Alsamghan AS, Bharti RK, Alsharm AA, Alshahrani MT, Alzahrani MA, Ayed AAN, Alsaleem MA, Ghazwani EY. Risk factors of colorectal cancer among Saudi Population: Case-control study. J Family Med Prim Care 2020; 9:5035-5040. [PMID: 33209840 PMCID: PMC7652174 DOI: 10.4103/jfmpc.jfmpc_895_20] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Revised: 06/14/2020] [Accepted: 07/14/2020] [Indexed: 11/05/2022] Open
Abstract
Background: Colorectal cancer (CRC) incidence and related mortalities have been steadily increasing in KSA over the past 20 years. CRC in the Kingdom of Saudi Arabia (KSA) population presents in younger ages and in more advanced disease states as compared to other countries. This study was aimed to determine factors (demographic, habitual, environmental, nutritional, and genetic) associated with CRC in Riyadh, KSA. Materials and Methods: A matched case-control study conducted in the major hospitals in Riyadh (King Khalid university Hospital, King Faisal Specialist Hospital, Riyadh Military Hospital, Security Force Hospital, King Fahd Medical City). Here most of CRC cases are managed. The cases (n = 121) group included all recently diagnosed and pathologically confirmed Saudi cases of CRC identified during the period 1st of January 2017 till 31st of December 2018 who agreed to participate and fulfilled the inclusion criteria. A similar number of controls attending the study settings were selected consecutively from the clinics where cases were managed and matched on a 1:1 basis with cases based on age (+/-3 years) and gender. Data were collected using a structured questionnaire. Conditional logistic regression models were fitted to determine factors associated with risk of CRC. Result: This study included similar number of males and females in both groups: males 69 (57%) and females 52 (43%) in each group (Chi-square test P = 1.0). The mean (S.D) age in the cases group was 53.6 (S.D = 12.9) and 53.3 (S.D = 12.9) in the controls group (Student test P = 0.86). In the final multivariate conditional logistic regression model, variables independently associated with risk of colorectal cancer were body mass index (OR = 0.93; 95% CI 0.87–0.98; P = 0.011) employment status (inverse relation: OR = 0.33; 95% CI 0.14–0.77; P = 0.010), colon polyps (OR = 4.09; 95% CI 1.06–15.82; P = 0.041), and constipation (OR = 4.98; 95% CI 1.91–15.99; P = 0.001). Conclusion: Factors associated with CRC in the major referral hospitals in KSA were colon polyps, chronic constipation, and unemployment. These factors should be considered when screening for patients at risk for CRC.
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Affiliation(s)
- Mansour Z Alqahtani
- Department of Community, Ministry of Health, King Khalid University, Abha, Kingdom of Saudi Arabia
| | - Ashry G Mohammed
- Department of Public Health, King Saud University, Abha, Kingdom of Saudi Arabia
| | - Awad S Alsamghan
- Department of Family and Community Medicine, College of Medicine, King Khalid University, Abha, Kingdom of Saudi Arabia
| | - Rishi K Bharti
- Department of Family and Community Medicine, College of Medicine, King Khalid University, Abha, Kingdom of Saudi Arabia
| | - Abdullah A Alsharm
- Department of Oncology, King Fahad Medical City, Abha, Kingdom of Saudi Arabia
| | - Mohammed T Alshahrani
- Department of Medical Service, Ministry of Defense, King Khalid University, Abha, Kingdom of Saudi Arabia
| | - Mohammed A Alzahrani
- Department of Internal Medicine, College of Medicine, King Khalid University, Abha, Kingdom of Saudi Arabia
| | - Adil Ali N Ayed
- Department of Family Medicine, King Khalid University, Najran, Kingdom of Saudi Arabia
| | - Mohammed Abadi Alsaleem
- Department of Family and Community Medicine, College of Medicine, King Khalid University, Abha, Kingdom of Saudi Arabia
| | - Eisa Y Ghazwani
- Department of Family and Community Medicine, College of Medicine, Najran University, Najran, Kingdom of Saudi Arabia
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Perillo F, Amoroso C, Strati F, Giuffrè MR, Díaz-Basabe A, Lattanzi G, Facciotti F. Gut Microbiota Manipulation as a Tool for Colorectal Cancer Management: Recent Advances in Its Use for Therapeutic Purposes. Int J Mol Sci 2020; 21:E5389. [PMID: 32751239 PMCID: PMC7432108 DOI: 10.3390/ijms21155389] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 07/27/2020] [Accepted: 07/28/2020] [Indexed: 02/06/2023] Open
Abstract
Colorectal cancer (CRC) is a multifaceted disease influenced by both environmental and genetic factors. A large body of literature has demonstrated the role of gut microbes in promoting inflammatory responses, creating a suitable microenvironment for the development of skewed interactions between the host and the gut microbiota and cancer initiation. Even if surgery is the primary therapeutic strategy, patients with advanced disease or cancer recurrence after surgery remain difficult to cure. Therefore, the gut microbiota has been proposed as a novel therapeutic target in light of recent promising data in which it seems to modulate the response to cancer immunotherapy. The use of microbe-targeted therapies, including antibiotics, prebiotics, live biotherapeutics, and fecal microbiota transplantation, is therefore considered to support current therapies in CRC management. In this review, we will discuss the importance of host-microbe interactions in CRC and how promoting homeostatic immune responses through microbe-targeted therapies may be useful in preventing/treating CRC development.
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Affiliation(s)
- Federica Perillo
- Department of Experimental Oncology, IEO European Institute of Oncology IRCCS, 20139 Milan, Italy; (F.P.); (C.A.); (M.R.G.); (A.D.-B.); (G.L.)
| | - Chiara Amoroso
- Department of Experimental Oncology, IEO European Institute of Oncology IRCCS, 20139 Milan, Italy; (F.P.); (C.A.); (M.R.G.); (A.D.-B.); (G.L.)
| | - Francesco Strati
- Department of Experimental Oncology, IEO European Institute of Oncology IRCCS, 20139 Milan, Italy; (F.P.); (C.A.); (M.R.G.); (A.D.-B.); (G.L.)
| | - Maria Rita Giuffrè
- Department of Experimental Oncology, IEO European Institute of Oncology IRCCS, 20139 Milan, Italy; (F.P.); (C.A.); (M.R.G.); (A.D.-B.); (G.L.)
| | - Angélica Díaz-Basabe
- Department of Experimental Oncology, IEO European Institute of Oncology IRCCS, 20139 Milan, Italy; (F.P.); (C.A.); (M.R.G.); (A.D.-B.); (G.L.)
- Department of Oncology and Hemato-Oncology, Università degli Studi di Milano, 20135 Milan, Italy
| | - Georgia Lattanzi
- Department of Experimental Oncology, IEO European Institute of Oncology IRCCS, 20139 Milan, Italy; (F.P.); (C.A.); (M.R.G.); (A.D.-B.); (G.L.)
- Department of Oncology and Hemato-Oncology, Università degli Studi di Milano, 20135 Milan, Italy
| | - Federica Facciotti
- Department of Experimental Oncology, IEO European Institute of Oncology IRCCS, 20139 Milan, Italy; (F.P.); (C.A.); (M.R.G.); (A.D.-B.); (G.L.)
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APC gene 3'UTR SNPs and interactions with environmental factors are correlated with risk of colorectal cancer in Chinese Han population. Biosci Rep 2020; 40:222328. [PMID: 32159210 PMCID: PMC7087318 DOI: 10.1042/bsr20192429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Revised: 02/19/2020] [Accepted: 03/03/2020] [Indexed: 11/29/2022] Open
Abstract
Objective: To study the correlation between adenomatous polyposis coli (APC) gene 3′ untranslated region (UTR) single nucleotide polymorphisms (SNPs) and their interactions with environmental factors and the risk of colorectal cancer (CRC) in a Chinese Han population. Methods: Genotypes of APC gene 3′UTR rs1804197, rs41116, rs448475, and rs397768 loci in 340 Chinese Han patients with CRC and 340 healthy controls were analyzed. All patients with CRC were analyzed for progression-free survival (PFS) during a 3-year follow-up. Results: The risk of CRC in subjects carrying the APC gene rs1804197 A allele was 2.95-times higher than for the C allele carriers. The interactions of the rs1804197 SNP with body mass index (BMI) and smoking were associated with the risk of CRC. The risk of CRC in the APC gene rs397768 G allele carriers was 1.68-times higher than in the A allele carriers. The interaction between the rs397768 locus SNP and gender was also associated with the risk of CRC. The 3-year PFS of patients with APC gene rs1804197 AA genotype, CA genotype, and CC genotype CRC decreased in this order, with significant difference. In addition, the 3-year PFS of rs397768 locus GG genotype, AG genotype, and AA genotype CRC patients decreased in this order, and the difference was significant. Conclusion: The rs1804197 locus in the 3′UTR region of the APC gene and its interactions with BMI and smoking are associated with the risk of CRC in a Chinese Han population. In addition, the interaction between rs397768 locus SNP and gender is related to the risk of CRC.
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Association of Folate and Vitamins Involved in the 1-Carbon Cycle with Polymorphisms in the Methylenetetrahydrofolate Reductase Gene (MTHFR) and Global DNA Methylation in Patients with Colorectal Cancer. Nutrients 2019; 11:nu11061368. [PMID: 31216671 PMCID: PMC6627304 DOI: 10.3390/nu11061368] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 05/30/2019] [Accepted: 06/04/2019] [Indexed: 01/09/2023] Open
Abstract
Folate, vitamin B2, vitamin B6, vitamin B12, choline, and betaine are nutrients involved in the 1-carbon cycle that can alter the levels of DNA methylation and influence genesis and/or tumor progression. Thus, the objective of this study was to evaluate the association of folate and vitamins involved in the 1-carbon cycle and MTHFR polymorphisms in global DNA methylation in patients with colorectal cancer gene. The study included 189 patients with colorectal adenocarcinoma answering a clinical evaluation questionnaire and the Food Frequency Questionnaire (FFQ) validated for patients with colon and rectal cancer. Blood samples were collected for evaluation of MTHFR gene polymorphisms in global DNA methylation in blood and in tumor. The values for serum folate were positively correlated with the equivalent total dietary folate (total DFE) (rho = 0.51, p = 0.03) and global DNA methylation (rho = 0.20, p = 0.03). Individuals aged over 61 years (p = 0.01) in clinicopathological staging III and IV (p = 0.01) and with + heterozygous mutated homozygous genotypes for the MTHFR A1298C gene had higher levels of global DNA methylation (p = 0.04). The association between dietary intake of folate, serum folate, and tumor stage were predictive of global DNA methylation in patients’ blood. The levels of serum folate, the dietary folate and the status of DNA methylation can influence clinicopathological staging.
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Lack of correlation between X-ray repair cross-complementing group 1 gene polymorphisms and the susceptibility to colorectal cancer in a Malaysian cohort. Eur J Cancer Prev 2018; 26:506-510. [PMID: 28059856 DOI: 10.1097/cej.0000000000000336] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
X-ray repair cross-complementing group 1 (XRCC1) is one of the key components in the base excision repair pathway that repairs erroneous DNA lesions and removes nonbulky base adducts for the maintenance of genome integrity. Studies have revealed that differences in individual DNA repair capacity can impact the interindividual variation in cancer susceptibility, tumour aggressiveness and treatment response. The relationship between XRCC1 and sporadic colorectal cancer (CRC) susceptibility, which is hitherto inconclusive, has been explored in many association studies of different populations. In view of the conflicting findings generated, we aimed to investigate the association between XRCC1 and genetic predisposition to CRC among Malaysians. The present case-control association study was conducted on 130 CRC patients and 212 age-matched healthy controls. The genotyping of XRCC1 Arg194Trp, Arg280His and Arg399Gln single nucleotide polymorphisms was performed with allele-specific real-time PCR approach. This was followed by basic statistical analysis on the single nucleotide polymorphisms and haplotype data obtained. No significant difference in the allele and genotype frequencies was observed between CRC patients and healthy controls (P>0.05). There was also no association observed between XRCC1 haplotypes and CRC (P>0.05). In conclusion, a positive association between XRCC1 gene polymorphisms and CRC risk was not established in our Malaysian population.
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18
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Song L, Xu X, Li Z. A serine protease extracted from Trichosanthes kirilowii inhibits epithelial-mesenchymal transition via antagonizing PKM2-mediated STAT3/Snail1 pathway in human colorectal adenocarcinoma cells. J Funct Foods 2018. [DOI: 10.1016/j.jff.2017.12.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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19
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Das V, Kalita J, Pal M. Predictive and prognostic biomarkers in colorectal cancer: A systematic review of recent advances and challenges. Biomed Pharmacother 2016; 87:8-19. [PMID: 28040600 DOI: 10.1016/j.biopha.2016.12.064] [Citation(s) in RCA: 172] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 12/15/2016] [Accepted: 12/15/2016] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Colorectal cancer (CRC) is one of the leading cause of cancer deaths worldwide. Since CRC is largely asymptomatic until alarm features develop to advanced stages, the implementation of the screening programme is very much essential to reduce cancer incidence and mortality rates. CRC occurs predominantly from accumulation of genetic and epigenetic changes in colon epithelial cells, which later gets transformed into adenocarcinomas. SCOPE OF REVIEW The current challenges of screening paradigm and diagnostic ranges are from semi-invasive methods like colonoscopy to non-invasive stool-based test, have resulted in over-diagnosis and over-treatment of CRC. Hence, new screening initiatives and deep studies are required for early diagnosis of CRC. In this regard, we not only summarise current predictive and prognostic biomarkers with their potential for diagnostic and therapeutic applications, but also describe current limitations, future perspectives and challenges associated with the progression of CRC. MAJOR CONCLUSIONS Currently many potential biomarkers have already been successfully translated into clinical practice eg. Fecal haemoglobin, Carcinoembryonic antigen (CEA) and CA19.9, although these are not highly promising diagnostic target for personalized medicine. So there is a critical need for reliable, minimally invasive, highly sensitive and specific genetic markers of an individualised and optimised patient treatment at the earliest disease stage possible. GENERAL SIGNIFICANCE Identification of a new biomarker, or a set of biomarkers to the development of a valid, and clinical sensible assay that can be served as an alternative tool for early diagnosis of CRC and open up promising new targets in therapeutic intervention strategies.
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Affiliation(s)
- Vishal Das
- Biotechnology Division, CSIR-North East Institute of Science and Technology, Jorhat, Assam 785006, India
| | - Jatin Kalita
- Biotechnology Division, CSIR-North East Institute of Science and Technology, Jorhat, Assam 785006, India
| | - Mintu Pal
- Biotechnology Division, CSIR-North East Institute of Science and Technology, Jorhat, Assam 785006, India.
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20
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Tayyem RF, Bawadi HA, Shehadah I, Agraib LM, AbuMweis SS, Al-Jaberi T, Al-Nusairr M, Bani-Hani KE, Heath DD. Dietary patterns and colorectal cancer. Clin Nutr 2016; 36:848-852. [PMID: 27206698 DOI: 10.1016/j.clnu.2016.04.029] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Revised: 04/26/2016] [Accepted: 04/28/2016] [Indexed: 01/13/2023]
Abstract
BACKGROUND & AIMS Dietary pattern and lifestyle have been reported to be important risk factors in the development of colorectal cancer (CRC). However, the mechanism of action of dietary factors in CRC disease is unclear. The aim of this study is the examination of several dietary choices and their potential association with the risk of developing CRC. METHODS Dietary data was collected from 220 subjects who were previously diagnosed with CRC, and 281 control subjects (matched by age, gender, occupation and marital status). The data was collected between January 2010 and December 2012, using interview-based questionnaires. Multivariate logistic regression was used to estimate the relationship between dietary choices and risk of developing colorectal cancer. RESULTS Factor analysis revealed three major dietary patterns. The first pattern we identified as the "Healthy Pattern", the second was identified as "High Sugar/High Tea Pattern" and the third as "Western Pattern". In the Healthy Pattern group we found a 10.54% variation in food intake, while the intake variation was 11.64% in the Western Pattern. After adjusting for confounding factors, the Western Pattern food choice was found to be significantly associated with an increased risk of developing CRC (OR = 1.88; 95% CI = 1.12-3.16). The results for the Healthy and High-Sugar/High Tea Patterns showed a decrease, but the statistic was not significant for the risk of CRC development. CONCLUSION The Western Pattern of dietary choice was directly associated with CRC. The association between the dietary food choice in the Healthy and High-Sugar/High Tea Patterns and colorectal cancer needs further study in our Jordanian population.
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Affiliation(s)
- Reema F Tayyem
- Department of Nutrition and Food Technology, Faculty of Agriculture, The University of Jordan, Amman 11942 Jordan.
| | - Hiba A Bawadi
- Human Nutrition Department, College of Health Sciences, Qatar University, P.O. Box: 2713, Doha, Qatar.
| | - Ihab Shehadah
- Chief Gastroenterology Division, King Hussein Cancer Center, Jordan.
| | - Lana M Agraib
- Department of Clinical Nutrition & Dietetic, The Hashemite University, P.O. Box 150459, Zarqa 13115, Jordan.
| | - Suhad S AbuMweis
- Department of Clinical Nutrition & Dietetic, The Hashemite University, P.O. Box 150459, Zarqa 13115, Jordan.
| | | | | | | | - Dennis D Heath
- Cancer Prevention and Control Program, Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA.
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Al-Halabi R, Abou Merhi R, Chakilam S, El-Baba C, Hamade E, Di Fazio P, Ocker M, Schneider-Stock R, Gali-Muhtasib H. Gallotannin is a DNA damaging compound that induces senescence independently of p53 and p21 in human colon cancer cells. Mol Carcinog 2015; 54:1037-50. [PMID: 24798519 DOI: 10.1002/mc.22172] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 04/04/2014] [Accepted: 04/07/2014] [Indexed: 02/05/2023]
Abstract
The plant secondary metabolite gallotannin (GT) is the simplest hydrolyzable tannin shown to have anti-carcinogenic properties in several cell lines and to inhibit tumor development in different animal models. Here, we determined if GT induces senescence and DNA damage and investigated the involvement of p53 and p21 in this response. Using HCT116 human colon cancer cells wildtype for p53(+/+) /p21(+/+) and null for p53(+/+) /p21(-/-) or p53(-/-) /p21(+/+) , we found that GT induces senescence independently of p21 and p53. GT was found to increase the production of reactive oxygen species (ROS) by altering the redox balance in the cell, mainly by reducing the levels of glutathione and superoxide dismutase (SOD). Using the key antioxidants N-acetyl cysteine, dithiothreitol, SOD, and catalase, we showed that ROS were partially involved in the senescence response. Furthermore, GT-induced cell cycle arrest in S-phase in all HCT116 cell lines. At later time points, we noticed that p53 and p21 null cells escaped complete arrest and re-entered cell cycle provoking higher rates of multinucleation. The senescence induction by GT was irreversible and was accompanied by significant DNA damage as evidenced by p-H2AX staining. Our findings indicate that GT is an interesting anti colon cancer agent which warrants further study.
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Affiliation(s)
- Racha Al-Halabi
- Department of Biology, Faculty of Sciences, EDST, Lebanese University, Beirut, Lebanon
- Institute for Surgical Research, Philipps University of Marburg, Marburg, Germany
| | - Raghida Abou Merhi
- Department of Biology, Faculty of Sciences, EDST, Lebanese University, Beirut, Lebanon
| | - Saritha Chakilam
- Experimental Tumorpathology, Institut of Pathology, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Chirine El-Baba
- Experimental Tumorpathology, Institut of Pathology, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Eva Hamade
- Department of Biology, Faculty of Sciences, EDST, Lebanese University, Beirut, Lebanon
| | - Pietro Di Fazio
- Institute for Surgical Research, Philipps University of Marburg, Marburg, Germany
| | - Matthias Ocker
- Institute for Surgical Research, Philipps University of Marburg, Marburg, Germany
| | - Regine Schneider-Stock
- Experimental Tumorpathology, Institut of Pathology, University of Erlangen-Nürnberg, Erlangen, Germany
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Hollis M, Nair K, Vyas A, Chaturvedi LS, Gambhir S, Vyas D. MicroRNAs potential utility in colon cancer: Early detection, prognosis, and chemosensitivity. World J Gastroenterol 2015; 21:8284-8292. [PMID: 26217080 PMCID: PMC4507098 DOI: 10.3748/wjg.v21.i27.8284] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 03/24/2015] [Accepted: 05/27/2015] [Indexed: 02/06/2023] Open
Abstract
Over the past decade, research has shown that aberrant expression of microRNA (miRNA) is involved in colorectal cancer development and progression. MicroRNAs are small sequences of non-coding RNA that regulate expression of genes involved in important cellular functions, such as cell differentiation, multiplication, and apoptosis. A specific miRNA may display the effects of a tumor suppressor or oncogene. Altered miRNA expression is found in colorectal cancer (CRC) and patterns of miRNA expression correlate with CRC detection and outcome. Studies also have examined the use of circulating serum miRNA and fecal miRNA expression as non-invasive markers for early detection. Here, we review recent evidence demonstrating the potential role of miRNA in CRC and the implications of its use in the diagnosis, prognosis, and management of CRC.
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Wang M, Li Y, Wang R, Wang Z, Chen K, Zhou B, Zhou Z, Sun X. PKA RIα/A-kinase anchoring proteins 10 signaling pathway and the prognosis of colorectal cancer. J Gastroenterol Hepatol 2015; 30:496-503. [PMID: 25213315 DOI: 10.1111/jgh.12689] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/28/2014] [Indexed: 02/05/2023]
Abstract
BACKGROUND AND AIM Previously study showed that the loss of the control of cAMP-dependent protein kinase A RIα (PKA RIα)/ A-kinase anchoring proteins 10 (AKAP10) signaling pathway initiate dysregulation of cellular healthy physiology leading to tumorigenesis. The aim of this study was to investigate the role of PKA RIα/AKAP10 signaling pathway in colorectal cancer (CRC). METHODS The AKAP10 expression at the mRNA and protein level have been analyzed in colon cancer cell lines, primary CRCs and matched normal mucosa samples, and compared in accordance with specific clinicopathological features of CRC. The correlation between expression of AKAP10 and PKA RIα were also analyzed. RESULTS Compared with HCT116 and SW480 cells, the AKAP10 was significantly upregulated in the colon cell line KM12C and its metastatic counterparts, KM12SM and KM12L4A. Moreover, the KM12SM and KM12L4A having high metastatic potentials displayed the elevated levels of AKAP10 compared with KM12C having poor metastatic potential. A notably higher level of AKAP10 expression was found in CRC tissues at both mRNA and protein levels. Increased expression of AKAP10 in CRC patients was positively associated with the depth of invasion and the grade of differentiation. Univariate survival analysis showed that the increased expression of AKAP10 was related to poorer survival. Cox multivariate regression analysis confirmed that AKAP10 was an independent predictor of the overall survival of CRC patients. PKA RIα mRNA was also expressed at high levels in CRC. The correlation coefficient between mRNA expression of AKAP10 and PKA RIα in CRC was 0.417. AKAP10 mRNA overexpression was correlated significantly with PKA RIα. CONCLUSIONS Our data indicated that PKA RIα/AKAP10 signaling pathway is associated with the progression and prognosis of CRC.
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Affiliation(s)
- Mojin Wang
- Department of Gastrointestinal Surgery, Institute of Digestive Surgery, National Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
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Saeed HM, Alanazi MS, Parine NR, Shaik J, Semlali A, Alharbi O, Azzam N, Aljebreen A, Almadi M, Shalaby MA. Matrix metalloproteinase-2 (-1306 c>t) promoter polymorphism and risk of colorectal cancer in the Saudi population. Asian Pac J Cancer Prev 2014; 14:6025-30. [PMID: 24289619 DOI: 10.7314/apjcp.2013.14.10.6025] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Matrix metalloproteinase-2 (MMP-2) is an enzyme with proteolytic activity against matrix proteins, particularly basement membrane constituents. A single nucleotide polymorphism (SNP) at -1306, which disrupts a Sp1-type promoter site (CCACC box), results in strikingly lower promoter activity with the T allele. In the present study, we investigated whether this MMP-2 genetic polymorphism might be associated with susceptibility to colorectal cancer (CRC) in the Saudi population. We also analyzed MMP-2 gene expression level sin CRC patients and 4 different cancer cell lines. MATERIALS AND METHODS TaqMan allele discrimination assays and DNA sequencing techniques were used to investigate the C-1306T SNP in the MMP-2 gene of Saudi colorectal cancer patients and controls. The MMP-2 gene expression level was also determined in 12 colon cancer tissue samples collected from unrelated patients and histologically normal tissues distant from tumor margins. RESULTS AND CONCLUSIONS The MMP-2 C-1306T SNP in the promoter region was associated with CRC in our Saudi population and the MMP-2 gene expression level was found to be 10 times higher in CRC patients. The MMP-2 C-1306T SNP is significantly associated with CRC in the Saudi population and this finding suggested that MMP-2 variants might help predict CRC progression risk among Saudis. We propose that analysis of this gene polymorphism could assist in identification of patient subgroups at risk of a poor disease outcome.
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Affiliation(s)
- Hesham Mahmoud Saeed
- Biochemistry Department, College of Science, King Saud University, Riyadh, KSA E-mail :
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Exploration and forecasting of behaviours and factors relating to fruit and vegetable intake among seniors in the community. Public Health Nutr 2014; 18:1052-9. [DOI: 10.1017/s1368980014001232] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
AbstractObjectiveThe present study investigated the current status of fruit and vegetable intake among seniors and assessed the relationship between personal background factors, social psychological factors and environmental factors of the study participants and their fruit and vegetable consumption behaviour.DesignResearch data were collected through individual interviews using a questionnaire developed by the authors. SPSS for Windows 15·0 statistical software was used to process and analyse the data.SettingElderly individuals sampled from all twenty-nine administration units of Keelung City’s Renai District were interviewed.SubjectsStudy participants included 398 residents aged 65 years or older.ResultsOn average, study participants ate five daily servings of fruits and vegetables on 2·86 d/week. The important variables influencing fruit and vegetable consumption were education level, outcome expectancy, social support, self-efficacy, frequency of dining out and role modelling. Educated participants consumed more fruits and vegetables than those without education. Outcome expectancy, social support, self-efficacy and role modelling had positive impacts on fruit and vegetable intake, but frequency of dining out had a negative impact on fruit and vegetable intake. The significant predictors of fruit and vegetable intake behaviour were education level, outcome expectancy, social support and frequency of dining out. Among those variables, social support was the most influential factor.ConclusionsOur findings supported the conclusion that health education strategies to increase fruit and vegetable intake among seniors should include the variables of social support and outcome expectancy.
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Have You Switched to a Low-Carbon Diet? The Ultimate Value of Low-Carbon Consumerism. ADMINISTRATIVE SCIENCES 2014. [DOI: 10.3390/admsci4020105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Saeed HM, Alanazi MS, Nounou HA, Salaby MA, Semlali A, Azzam N, Aljebreen A, Alharby O, Parine NR, Shaik J, Arafaha M. Cytochrome P450 1A1, 2E1 and GSTM1 gene polymorphisms and susceptibility to colorectal cancer in the Saudi population. Asian Pac J Cancer Prev 2014; 14:3761-8. [PMID: 23886179 DOI: 10.7314/apjcp.2013.14.6.3761] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The Saudi population has experienced a sharp increase in colorectal and gastric cancer incidences within the last few years. The relationship between gene polymorphisms of xenobiotic metabolizing enzymes and colorectal cancer (CRC) incidence has not previously investigated among the Saudi population. The aim of the present study was to investigate contributions of CYP1A1, CYP2E1, and GSTM1 gene polymorphisms. MATERIALS AND METHODS Blood samples were collected from CRC patients and healthy controls and genotypes were determined by polymerase chain reaction restriction fragment length polymorphism and sequencing. RESULTS AND CONCLUSIONS CYP2E1*6 was not significantly associated with CRC development (odd ratio=1.29; confidence interval 0.68-2.45). A remarkable and statistically significant association was observed among patients with CYP1Awt/*2A (odd ratio=3.65; 95% confidence interval 1.39-9.57). The GSTM1*0/*0 genotype was found in 2% of CRC patients under investigation. The levels of CYP1A1, CYP2E1 and GSTM1 mRNA gene expression were found to be 4, 4.2 and 4.8 fold, respectively, by quantitative real time PCR. The results of the present case-control study show that the studied Saudi population resembles Caucasians with respect to the considered polymorphisms. Investigation of genetic risk factors and susceptibility gene polymorphisms in our Saudi population should be helpful for better understanding of CRC etiology.
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Affiliation(s)
- Hesham Mahmoud Saeed
- Department of Biochemistry, College of Science, King Saud University, Riyadh, KSA.
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Hutchison J, Cohen Z, Onyeaguchi BC, Funk J, Nelson MA. How microRNAs influence both hereditary and inflammatory-mediated colon cancers. Cancer Genet 2013; 206:309-16. [PMID: 24042167 PMCID: PMC3893936 DOI: 10.1016/j.cancergen.2013.06.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Revised: 06/03/2013] [Accepted: 06/24/2013] [Indexed: 01/08/2023]
Abstract
MicroRNAs have emerged as important post-translational regulators of gene expression and are involved in several physiological and pathological states including the pathogenesis of human colon cancers. In regards to tumor development, microRNAs can act as oncogenes or tumor suppressors. Two hereditary predispositions (i.e., Lynch syndrome and familial adenomatous polyposis) contribute to the development of colon cancer. In addition, individuals who suffer from inflammatory bowel diseases such as Crohn's disease or ulcerative colitis have a higher risk of developing colon cancer. Here, we discuss the occurrence of the deregulated expression of microRNAs in colon cancer that arise as a result of hereditary predisposition and inflammatory bowel disease.
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Affiliation(s)
| | - Zoe Cohen
- Department of Physiology, University of Arizona
| | | | - Janet Funk
- Department of Medicine, Arizona Cancer Center, University of Arizona
| | - Mark A. Nelson
- Department of Pathology, Arizona Cancer Center, University of Arizona
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Tan SC, Suzairi MSM, Aizat AAA, Aminudin MM, Nurfatimah MSS, Bhavaraju VMK, Biswal BM, Ankathil R. Gender-specific association of NFKBIA promoter polymorphisms with the risk of sporadic colorectal cancer. Med Oncol 2013; 30:693. [PMID: 23996241 DOI: 10.1007/s12032-013-0693-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2013] [Accepted: 08/09/2013] [Indexed: 02/07/2023]
Abstract
The inhibitory protein IκBα, encoded by the NFKBIA gene, plays an important role in regulating the activity of nuclear factor-kappa B, a transcription factor which has been implicated in the initiation and progression of cancers. This study aimed to evaluate the association of NFKBIA -826C>T (rs2233406) and -881A>G (rs3138053) polymorphisms with the risk of sporadic colorectal cancer (CRC) in Malaysian population. A case-control study comprising 474 subjects (237 CRC patients and 237 cancer-free controls) was carried out. The polymorphisms were genotyped from the genomic DNA of the study subjects employing PCR-RFLP, followed by DNA sequencing. The association between the polymorphic genotypes and CRC risk was evaluated by deriving odds ratios (ORs) and 95 % confidence intervals (CIs) using unconditional logistic regression analysis. The two polymorphisms were in complete and perfect linkage disequilibrium (D' = 1.0, r (2) = 1.0). Overall, no statistically significant CRC risk association was found for the polymorphisms (P > 0.05). A similar lack of association was observed when the data were stratified according to ethnicity (P > 0.05). However, stratification by gender revealed a significant inverse association between the heterozygous genotype of the polymorphisms and the risk of CRC among females (OR 0.53, 95 % CI 0.29-0.97, P = 0.04), but not among males (P > 0.05). In conclusion, the heterozygous genotype of the polymorphisms could contribute to a significantly decreased CRC risk among females, but not males, in the Malaysian population.
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Affiliation(s)
- Shing Cheng Tan
- Human Genome Centre, School of Medical Sciences, Health Campus, Universiti Sains Malaysia, 16150, Kubang Kerian, Kelantan, Malaysia,
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quantitative assessment of the influence of cytochrome P450 1A2 gene polymorphism and colorectal cancer risk. PLoS One 2013; 8:e71481. [PMID: 23951174 PMCID: PMC3741149 DOI: 10.1371/journal.pone.0071481] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Accepted: 06/28/2013] [Indexed: 01/01/2023] Open
Abstract
Cytochrome P450 1A2 (CYP1A2) encodes a member of the cytochrome P450 superfamily of enzymes, which play a central role in activating and detoxifying many carcinogens and endogenous compounds thought to be involved in the development of colorectal cancer (CRC). The CYP1A2*C (rs2069514) and CYP1A2*F (rs762551) polymorphism are two of the most commonly studied polymorphisms of the gene for their association with risk of CRC, but the results are conflicting. To derive a more precise estimation of the relationship between CYP1A2 and genetic risk of CRC, we performed a comprehensive meta-analysis which included 7088 cases and 7568 controls from 12 published case-control studies. In a combined analysis, the summary per-allele odds ratio for CRC was 0.91 (95% CI: 0.83-1.00, P = 0.04), and 0.91 (95% CI: 0.68-1.22, P = 0.53), for CYP1A2 *F and *C allele, respectively. In the subgroup analysis by ethnicity, significant associations were found in Asians for CYP1A2*F and CYP1A2*C, while no significant associations were detected among Caucasian populations. Similar results were also observed using dominant genetic model. Potential sources of heterogeneity were explored by subgroup analysis and meta-regression. No significant heterogeneity was detected in most of comparisons. This meta-analysis suggests that the CYP1A2 *F and *C polymorphism is a protective factor against CRC among Asians.
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A comparative overview of general risk factors associated with the incidence of colorectal cancer. Tumour Biol 2013; 34:2469-76. [PMID: 23832537 DOI: 10.1007/s13277-013-0876-y] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Accepted: 05/16/2013] [Indexed: 12/14/2022] Open
Abstract
Cancers found in colorectal region remain largely localized to the large intestine and rectum. They are derived from the epithelium and are considered to be among the most frequently detected cancers. They are known to occur in approximately 5 % population of the Western world. After metastasis, a patient's 5-year postsurgical survival chances unfortunately fall from 90 to 10 % or even less. Adenocarcinoma, the most common cell type of colon cancer, alone constitutes 95 % of the cases. Lymphoma and squamous cell carcinoma can also be found in some cases. Because 5 % of persons are predisposed to development of colorectal cancer, this disease has often been addressed as an important public health issue. Factors that are known in particular to increase a person's risk to develop this cancer are as follows: an individual's age, dietary habits, any complaint of obesity, diabetes, previous history of cancer or intestinal polyps, personal habit of alcohol consumption and smoking, family history of colon cancer, race, sex, and ethnicity. Since the risk of colorectal cancer is increasing steadily in Kashmir, India, like in some other corners of Asia, exhaustive efforts are being made to find the association of above given and other risk factors with the development of this gastrointestinal tract cancer. Adoption of Western life style, diet mimicry, together with a habit of having physically inactive life style and consumption of red meat in particular can be blamed as being active players to a considerable extent.
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Mohd Suzairi MS, Tan SC, Ahmad Aizat AA, Mohd Aminudin M, Siti Nurfatimah MS, Andee ZD, Ankathil R. The functional -94 insertion/deletion ATTG polymorphism in the promoter region of NFKB1 gene increases the risk of sporadic colorectal cancer. Cancer Epidemiol 2013; 37:634-8. [PMID: 23806437 DOI: 10.1016/j.canep.2013.05.007] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Revised: 05/12/2013] [Accepted: 05/28/2013] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To investigate the allele and genotype frequencies of NFKB1 -94 ins/del ATTG (rs28720239) polymorphism and to evaluate the association between the polymorphism and colorectal cancer (CRC) risk in Malaysian population. METHODS Genomic DNA was extracted from the peripheral blood samples of 474 study subjects, which consisted of 237 histopathologically confirmed CRC patients and an equal number of cancer-free controls. The NFKB1 -94 ins/del ATTG (rs28720239) polymorphism was genotyped using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method and confirmed by DNA sequencing. The association between the polymorphic genotypes and CRC risk was evaluated by deriving odds ratios (ORs) and 95% confidence intervals (CIs) using unconditional logistic regression analysis. RESULTS The frequencies of wildtype (del/del), heterozygous (del/ins) and variant (ins/ins) genotypes in CRC patients were 31.7%, 53.6% and 14.8%, respectively, while those in cancer-free controls were 35.0%, 58.2% and 6.8%, respectively. The frequency of the variant genotype was significantly higher in cases compared to controls (P<0.01). Evaluation of the risk association of the polymorphic genotypes revealed that the variant genotype could contribute to a significantly increased risk of CRC (OR=2.42, 95% CI=1.24-4.73, P<0.01). CONCLUSIONS The variant allele of NFKB1 -94 ins/del ATTG (rs28362491) polymorphism is associated with higher risk of sporadic CRC in Malaysian population.
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Affiliation(s)
- Mohd Shafi'i Mohd Suzairi
- Human Genome Centre, School of Medical Sciences, Health Campus, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia
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Kunte DP, DelaCruz M, Wali RK, Menon A, Du H, Stypula Y, Patel A, Backman V, Roy HK. Dysregulation of microRNAs in colonic field carcinogenesis: implications for screening. PLoS One 2012; 7:e45591. [PMID: 23049818 PMCID: PMC3458063 DOI: 10.1371/journal.pone.0045591] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Accepted: 08/23/2012] [Indexed: 12/18/2022] Open
Abstract
Colorectal cancer (CRC) screening tests often have a trade-off between efficacy and patient acceptability/cost. Fecal tests (occult blood, methylation) engender excellent patient compliance but lack requisite performance underscoring the need for better population screening tests. We assessed the utility of microRNAs (miRNAs) as markers of field carcinogenesis and their potential role for CRC screening using the azoxymethane (AOM)-treated rat model. We found that 63 miRNAs were upregulated and miR-122, miR-296-5p and miR-503# were downregulated in the uninvolved colonic mucosa of AOM rats. We monitored the expression of selected miRNAs in colonic biopsies of AOM rats at 16 weeks and correlated it with tumor development. We noted that the tumor bearing rats had significantly greater miRNA modulation compared to those without tumors. The miRNAs showed good diagnostic performance with an area under the receiver operator curve (AUROC) of >0.7. We also noted that the miRNA induction in the colonic mucosa was mirrorred in the mucus layer fecal colonocytes isolated from AOM rat stool and the degree of miRNA induction was greater in the tumor bearing rats compared to those without tumors. Lastly, we also noted significant miRNA modulation in the Pirc rats- the genetic model of colon carcinogenesis, both in the uninvolved colonic mucosa and the fecal colonocytes. We thus demonstrate that miRNAs are excellent markers of field carcinogenesis and could accurately predict future neoplasia. Based on our results, we propose an accurate, inexpensive, non-invasive miRNA test for CRC risk stratification based on rectal brushings or from abraded fecal colonocytes.
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Affiliation(s)
- Dhananjay P. Kunte
- Department of Medicine, NorthShore University HealthSystem, Evanston, Illinois, United States of America
| | - Mart DelaCruz
- Department of Medicine, NorthShore University HealthSystem, Evanston, Illinois, United States of America
| | - Ramesh K. Wali
- Department of Medicine, NorthShore University HealthSystem, Evanston, Illinois, United States of America
| | - Ashwaty Menon
- Department of Medicine, NorthShore University HealthSystem, Evanston, Illinois, United States of America
| | - Hongyan Du
- Department of Medicine, NorthShore University HealthSystem, Evanston, Illinois, United States of America
| | - Yolanda Stypula
- Department of Biomedical Engineering, Northwestern University, Evanston, Illinois, United States of America
| | - Amir Patel
- Department of Medicine, NorthShore University HealthSystem, Evanston, Illinois, United States of America
| | - Vadim Backman
- Department of Biomedical Engineering, Northwestern University, Evanston, Illinois, United States of America
| | - Hemant K. Roy
- Department of Medicine, NorthShore University HealthSystem, Evanston, Illinois, United States of America
- * E-mail:
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Evaluating risk factor assumptions: a simulation-based approach. BMC Med Inform Decis Mak 2011; 11:55. [PMID: 21899767 PMCID: PMC3182875 DOI: 10.1186/1472-6947-11-55] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2010] [Accepted: 09/07/2011] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND Microsimulation models are an important tool for estimating the comparative effectiveness of interventions through prediction of individual-level disease outcomes for a hypothetical population. To estimate the effectiveness of interventions targeted toward high risk groups, the mechanism by which risk factors influence the natural history of disease must be specified. We propose a method for evaluating these risk factor assumptions as part of model-building. METHODS We used simulation studies to examine the impact of risk factor assumptions on the relative rate (RR) of colorectal cancer (CRC) incidence and mortality for a cohort with a risk factor compared to a cohort without the risk factor using an extension of the CRC-SPIN model for colorectal cancer. We also compared the impact of changing age at initiation of screening colonoscopy for different risk mechanisms. RESULTS Across CRC-specific risk factor mechanisms, the RR of CRC incidence and mortality decreased (towards one) with increasing age. The rate of change in RRs across age groups depended on both the risk factor mechanism and the strength of the risk factor effect. Increased non-CRC mortality attenuated the effect of CRC-specific risk factors on the RR of CRC when both were present. For each risk factor mechanism, earlier initiation of screening resulted in more life years gained, though the magnitude of life years gained varied across risk mechanisms. CONCLUSIONS Simulation studies can provide insight into both the effect of risk factor assumptions on model predictions and the type of data needed to calibrate risk factor models.
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Picelli S, Zajac P, Zhou XL, Edler D, Lenander C, Dalén J, Hjern F, Lundqvist N, Lindforss U, Påhlman L, Smedh K, Törnqvist A, Holm J, Janson M, Andersson M, Ekelund S, Olsson L, Lundeberg J, Lindblom A. Common variants in human CRC genes as low-risk alleles. Eur J Cancer 2010; 46:1041-8. [PMID: 20149637 DOI: 10.1016/j.ejca.2010.01.013] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2009] [Accepted: 01/14/2010] [Indexed: 12/18/2022]
Abstract
The genetic susceptibility to colorectal cancer (CRC) has been estimated to be around 35% and yet high-penetrance germline mutations found so far explain less than 5% of all cases. Much of the remaining variations could be due to the co-inheritance of multiple low penetrant variants. The identification of all the susceptibility alleles could have public health relevance in the near future. To test the hypothesis that what are considered polymorphisms in human CRC genes could constitute low-risk alleles, we selected eight common SNPs for a pilot association study in 1785 cases and 1722 controls. One SNP, rs3219489:G>C (MUTYH Q324H) seemed to confer an increased risk of rectal cancer in homozygous status (OR=1.52; CI=1.06-2.17). When the analysis was restricted to our 'super-controls', healthy individuals with no family history for cancer, also rs1799977:A>G (MLH1 I219V) was associated with an increased risk in both colon and rectum patients with an odds ratio of 1.28 (CI=1.02-1.60) and 1.34 (CI=1.05-1.72), respectively (under the dominant model); while 2 SNPs, rs1800932:A>G (MSH6 P92P) and rs459552:T>A (APC D1822V) seemed to confer a protective effect. The latter, in particular showed an odds ratio of 0.76 (CI=0.60-0.97) among colon patients and 0.73 (CI=0.56-0.95) among rectal patients. In conclusion, our study suggests that common variants in human CRC genes could constitute low-risk alleles.
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Affiliation(s)
- Simone Picelli
- Department of Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden
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Rao CV, Steele VE, Swamy MV, Patlolla JM, Guruswamy S, Kopelovich L. Inhibition of azoxymethane-induced colorectal cancer by CP-31398, a TP53 modulator, alone or in combination with low doses of celecoxib in male F344 rats. Cancer Res 2009; 69:8175-82. [PMID: 19826045 PMCID: PMC2792897 DOI: 10.1158/0008-5472.can-09-1377] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Tumor suppressor p53 plays a major role in colorectal cancer development. The present study explores the effects of p53-modulating agent CP-31398 alone and combined with celecoxib on azoxymethane-induced aberrant crypt foci (ACF) and colon adenocarcinomas in F344 rats. Maximum tolerated doses were 400 and 3,000 ppm for CP-31398 and celecoxib, respectively. ACF and tumor efficacy endpoints were carried out on azoxymethane-treated 7-week-old rats (48 per group) fed the control AIN-76A diet. Two weeks after carcinogen treatment, rats were fed the diets containing 0, 150, or 300 ppm CP-31398, 300 ppm celecoxib, or 150 ppm CP-31398 plus 300 ppm celecoxib. ACF and colon adenocarcinomas were determined at 8 and 48 weeks after azoxymethane treatment, respectively. Dietary CP-31398 was shown to suppress mean colonic total ACF by 43% and multicrypt ACF by 63%; dietary CP-31398 at 150 and 300 ppm suppressed adenocarcinoma incidence by 30.4% (P < 0.02) and 44% (P < 0.005), respectively, and adenocarcinoma multiplicity by 51% (P < 0.005) and 65% (P < 0.0001), respectively. Dietary celecoxib suppressed colon adenocarcinoma incidence (60%; P < 0.0003) and multiplicity (70%; P < 0.0001). Importantly, combination of low-dose CP-31398 and celecoxib suppressed colon adenocarcinoma incidence by 78% and multiplicity by 90%. Rats that were fed the high-dose CP-31398 or a combination of low-dose CP-31398 and celecoxib showed considerable enhancement of p53 and p21(WAF1/CIP) expression, apoptosis, and reduced tumor cell proliferation in colonic tumors. These observations show, for the first time, that CP-31398 possesses significant dose-dependent chemopreventive activity in a well-established colon cancer model and that a combination of low-dose CP-31398 and celecoxib significantly enhanced colon cancer chemopreventive efficacy.
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Affiliation(s)
- Chinthalapally V. Rao
- Department of Medicine, Hem-Onc Section, University of Oklahoma Cancer Institute, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104
| | - Vernon E. Steele
- Chemopreventive Agent Development Research Group, Division of Cancer Prevention, National Cancer Institute, Bethesda, MD
| | - Malisetty V. Swamy
- Department of Medicine, Hem-Onc Section, University of Oklahoma Cancer Institute, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104
| | - Jagan M.R. Patlolla
- Department of Medicine, Hem-Onc Section, University of Oklahoma Cancer Institute, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104
| | - Suresh Guruswamy
- Department of Medicine, Hem-Onc Section, University of Oklahoma Cancer Institute, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104
| | - Levy Kopelovich
- Chemopreventive Agent Development Research Group, Division of Cancer Prevention, National Cancer Institute, Bethesda, MD
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Klenow S, Pool-Zobel BL, Glei M. Influence of inorganic and organic iron compounds on parameters of cell growth and survival in human colon cells. Toxicol In Vitro 2009; 23:400-7. [DOI: 10.1016/j.tiv.2009.01.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Tammali R, Reddy ABM, Ramana KV, Petrash JM, Srivastava SK. Aldose reductase deficiency in mice prevents azoxymethane-induced colonic preneoplastic aberrant crypt foci formation. Carcinogenesis 2008; 30:799-807. [PMID: 19028703 DOI: 10.1093/carcin/bgn246] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Aldose reductase (AR; EC 1.1.1.21), an nicotinamide adenine dinucleotide phosphate-dependent aldo-keto reductase, has been shown to be involved in oxidative stress signaling initiated by inflammatory cytokines, chemokines and growth factors. Recently, we have shown that inhibition of this enzyme prevents the growth of colon cancer cells in vitro as well as in nude mice xenografts. Herein, we investigated the mediation of AR in the formation of colonic preneoplastic aberrant crypt foci (ACF) using azoxymethane (AOM)-induced colon cancer mice model. Male BALB/c mice were administrated with AOM without or with AR inhibitor, sorbinil and at the end of the protocol, all the mice were euthanized and colons were evaluated for ACF formation. Administration of sorbinil significantly lowered the number of AOM-induced ACF. Similarly, AR-null mice administered with AOM demonstrated significant resistance to ACF formation. Furthermore, inhibition of AR or knockout of AR gene in the mice significantly prevented AOM-induced expression of inducible nitric oxide synthase and cyclooxygenase-2 proteins as well as their messenger RNA. AR inhibition or knockdown also significantly decreased the phosphorylation of protein kinase C (PKC) beta2 and nuclear factor kappa binding protein as well as expression of preneoplastic marker proteins such as cyclin D1 and beta-catenin in mice colons. Our results suggest that AR mediates the formation of ACF in AOM-treated mice and thereby inhibition of AR could provide an effective chemopreventive approach for the treatment of colon cancer.
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Affiliation(s)
- Ravinder Tammali
- Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, TX 77555-0647, USA
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Gender differences in the trend of colorectal cancer incidence in Singapore, 1968-2002. Int J Colorectal Dis 2008; 23:461-7. [PMID: 18185939 DOI: 10.1007/s00384-007-0421-9] [Citation(s) in RCA: 139] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/07/2007] [Indexed: 02/04/2023]
Abstract
BACKGROUND AND AIMS Over the past decades, incidence trends of colorectal cancer are sharply increased in Singapore. In this population-based study we describe changes in colorectal cancer incidence in Singapore and explore the reasons behind these changes through age-period cohort (APC) modeling. METHODS We included all 22,609 colorectal cancer cases reported to the Singapore Cancer Registry between 1968 and 2002. Poisson regression, using age-period (AP) and age-cohort (AC) models was used to determine the effects of age at diagnosis, calendar period, and birth cohort. RESULTS Male colorectal cancer rates between 1968 and 2002 from 20 to 40 per 100,000 person years. The increase was sharpest among older men, for whom there was a significant AC effect. Female colorectal cancer rates increased until 1992 (from 16 to 29 per 100,000 person years) and stabilized afterward. For women under 65 years, we observed a significant AP effect, corresponding to a sudden rise in colorectal cancer incidence around 1978. CONCLUSIONS This study demonstrates important gender differences in colorectal cancer incidence in Singapore, with increasing rates among men, and stabilized rates in women. The increase in men is mainly attributable to an incidence increase in the oldest age groups, probably due to increased exposure to dietary and lifestyle risk factors earlier in life. The stabilization in female colorectal cancer risk could be due to lower exposure to lifestyle risk factors and prophylactic removal of precancerous lesions.
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Harriss DJ, Cable NT, George K, Reilly T, Renehan AG, Haboubi N. Physical activity before and after diagnosis of colorectal cancer: disease risk, clinical outcomes, response pathways and biomarkers. Sports Med 2008; 37:947-60. [PMID: 17953466 DOI: 10.2165/00007256-200737110-00003] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Physical inactivity may be responsible for 13-14% of colon cancer, an attributable risk greater than family history. Epidemiological evidence shows an association between occupational and recreational physical activity and colon cancer, but has not established whether physical activity is protective against low-risk or more advanced adenomas. The evidence is inconclusive as to whether physical activity protects against rectal cancer and is conflicting with respect to whether physical activity has equal effects on male and female risk of colorectal cancer. The effect of exercise 'interventions' on the risk of colorectal cancer is currently not known. Also, although inferences can be made from epidemiological studies, no optimal exercise regimen can be confidently prescribed for protection against colorectal cancer. There is little available evidence for the benefits of physical activity before diagnosis of colorectal cancer for disease-specific survival and prognosis, and the clinical effects of an exercise intervention after diagnosis have not been investigated. There is some evidence that improvements in cardiorespiratory fitness reduce adverse effects from cancer treatment when physical activity is undertaken following diagnosis of colorectal cancer. Markers/mechanisms by which physical activity may protect against colorectal cancer and/or improve disease prognosis include gastrointestinal transit-time, chronic inflammation, immune function, insulin levels, insulin-like growth factors, genetics and obesity. Research evidence is, however, limited as to whether these markers are beneficially affected by physical activity, either before or after diagnosis of colorectal cancer.
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Affiliation(s)
- David J Harriss
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Henry Cotton Campus, Liverpool, UK.
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Pardini B, Naccarati A, Novotny J, Smerhovsky Z, Vodickova L, Polakova V, Hanova M, Slyskova J, Tulupova E, Kumar R, Bortlik M, Barale R, Hemminki K, Vodicka P. DNA repair genetic polymorphisms and risk of colorectal cancer in the Czech Republic. Mutat Res 2007; 638:146-53. [PMID: 17991492 DOI: 10.1016/j.mrfmmm.2007.09.008] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2007] [Revised: 09/20/2007] [Accepted: 09/25/2007] [Indexed: 12/19/2022]
Abstract
Colorectal cancer represents a complex disease where susceptibility may be influenced by genetic polymorphisms in the DNA repair system. In the present study we investigated the role of nine single nucleotide polymorphisms in eight DNA repair genes on the risk of colorectal cancer in a hospital-based case-control population (532 cases and 532 sex- and age-matched controls). Data analysis showed that the variant allele homozygotes for the Asn148Glu polymorphism in the APE1 gene were at a statistically non-significant increased risk of colorectal cancer. The risk was more pronounced for colon cancer (odds ratio, OR: 1.50; 95% confidence interval, CI: 1.01-2.22; p=0.05). The data stratification showed increased risk of colorectal cancer in the age group 64-86 years in both individuals heterozygous (OR: 1.79; 95% CI: 1.04-3.07; p=0.04) and homozygous (OR: 2.57; 95% CI: 1.30-5.06; p=0.007) for the variant allele of the APE1 Asn148Glu polymorphism. Smokers homozygous for the variant allele of the hOGG1 Ser326Cys polymorphism showed increased risk of colorectal cancer (OR: 4.17; 95% CI: 1.17-15.54; p=0.03). The analysis of binary genotype combinations showed increased colorectal cancer risk in individuals simultaneously homozygous for the variant alleles of APE1 Asn148Glu and hOGG1 Ser326Cys (OR: 6.37; 95% CI: 1.40-29.02; p=0.02). Considering the subtle effect of the DNA repair polymorphisms on the risk of colorectal cancer, exploration of gene-gene and gene-environmental interactions with a large sample size with sufficient statistical power are recommended.
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Affiliation(s)
- B Pardini
- Department of Molecular Biology of Cancer, Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Videnska 1083, 14220 Prague 4, Czech Republic
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42
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Küry S, Buecher B, Robiou-du-Pont S, Scoul C, Sébille V, Colman H, Le Houérou C, Le Neel T, Bourdon J, Faroux R, Ollivry J, Lafraise B, Chupin LD, Bézieau S. Combinations of cytochrome P450 gene polymorphisms enhancing the risk for sporadic colorectal cancer related to red meat consumption. Cancer Epidemiol Biomarkers Prev 2007; 16:1460-7. [PMID: 17627011 DOI: 10.1158/1055-9965.epi-07-0236] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Susceptibility to sporadic colorectal cancers (CRC) is generally thought to be the sum of complex interactions between environmental and genetic factors, all of which contribute independently, producing only a modest effect on the whole phenomenon. However, to date, most research has concealed the notion of interaction and merely focused on dissociate analyses of risk factors to highlight associations with CRC. By contrast, we have chosen a combinative approach here to explore the joint effects of several factors at a time. Through an association study based on 1,023 cases and 1,121 controls, we examined the influence on CRC risk of environmental factors coanalyzed with combinations of six single nucleotide polymorphisms located in cytochrome P450 genes (c.-163A>C and c.1548T>C in CYP1A2, g.-1293G>C and g.-1053C>T in CYP2E1, c.1294C>G in CYP1B1, and c.430C>T in CYP2C9). Whereas separate analyses of the SNPs showed no effect on CRC risk, three allelic variant combinations were found to be associated with a significant increase in CRC risk in interaction with an excessive red meat consumption, thereby exacerbating the intrinsic procarcinogenic effect of this dietary factor. One of these three predisposing combinations was also shown to interact positively with obesity. Provided that they are validated, our results suggest the need to develop robust combinative methods to improve genetic investigations into the susceptibility to CRC.
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Affiliation(s)
- Sébastien Küry
- Laboratoire d'Etude de l'ADN, Faculté de Médecine de Nantes, 1 rue Gaston Veil, 44035 Nantes Cedex, France.
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43
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Gu K, Bi L, Zhao M, Wang C, Ju J, Peng S. Toward the development of chemoprevention agents. Part 1: Design, synthesis, and anti-inflammatory activities of a new class of 2,5-disubstituted-dioxacycloalkanes. Bioorg Med Chem 2007; 15:4775-99. [PMID: 17512740 DOI: 10.1016/j.bmc.2007.05.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2007] [Revised: 04/20/2007] [Accepted: 05/01/2007] [Indexed: 11/18/2022]
Abstract
A new class of 2,5-disubstituted-dioxacycloalkanes were designed and synthesized via stereoselective synthetic method as cancer chemoprevention agents. The anti-inflammatory activities of these compounds were tested using the xylene-induced mouse ear edema model. Some of these compounds exhibited comparable or better anti-inflammatory activities than that of aspirin suggesting that they can be further developed as potential anti-inflammatory drug lead compounds. In addition, treatment of these anti-inflammatory agents did not prolong tail bleeding time in mice. The structure/activity relationships were also analyzed among these compounds.
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Affiliation(s)
- Keli Gu
- College of Pharmaceutical Sciences, Capital University of Medical Sciences, Beijing 100054, PR China
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44
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De Preter V, Raemen H, Cloetens L, Houben E, Rutgeerts P, Verbeke K. Effect of dietary intervention with different pre- and probiotics on intestinal bacterial enzyme activities. Eur J Clin Nutr 2007; 62:225-31. [PMID: 17327863 DOI: 10.1038/sj.ejcn.1602706] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To investigate the influence of different pre- and probiotics on faecal beta-glucuronidase and beta-glucosidase activity, as one of the claimed beneficial effects of pre- and probiotics is the hypothesis that these substrates are able to reduce the production of toxic and carcinogenic metabolites by suppressing specific enzyme activities in the colon. SETTING Department of Gastrointestinal Research, University Hospital Gasthuisberg, KU Leuven, Belgium. DESIGN AND SUBJECTS The effect was evaluated in a randomized, crossover study in 53 healthy volunteers who were randomly assigned to one of five treatment groups. INTERVENTIONS At the start and after a 4-week treatment period, the healthy volunteers collected faeces during 72 h. Lactulose and oligofructose-enriched inulin (OF-IN) were chosen as prebiotics, whereas Lactobacillus casei Shirota, Bifidobacterium breve and Saccharomyces boulardii were selected as probiotics. Two synbiotic combinations were evaluated as well. The enzyme activity was assessed spectrophotometricly. RESULTS Lactulose and OF-IN significantly decreased beta-glucuronidase activity, whereas a tendency to a decreased beta-glucuronidase activity was observed after L. casei Shirota and B. breve intake. To the contrary, B. breve increased beta-glucosidase levels. Supplementation with the synbiotic did not appear to be more beneficial than either compound alone. No influence of S. boulardii was noted. CONCLUSIONS Administration of lactulose, OF-IN, L. casei Shirota or B. breve resulted in a decrease of the beta-glucuronidase activity, which is considered beneficial for the host.
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Affiliation(s)
- V De Preter
- Department of Gastrointestinal Research, University Hospital Gasthuisberg, Leuven, Belgium
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45
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Naccarati A, Pardini B, Hemminki K, Vodicka P. Sporadic colorectal cancer and individual susceptibility: a review of the association studies investigating the role of DNA repair genetic polymorphisms. Mutat Res 2007; 635:118-145. [PMID: 17419091 DOI: 10.1016/j.mrrev.2007.02.001] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2006] [Revised: 02/08/2007] [Accepted: 02/12/2007] [Indexed: 02/08/2023]
Abstract
Mutations in one of the DNA repair genes are one of the most common reasons for cancer, and it may be assumed that the individual genetic background modulating the DNA repair capacity may affect the susceptibility to cancer. Numerous polymorphisms (mainly SNPs) have been identified for DNA repair genes, although their functional outcome and phenotypic effect is often unknown. The aim of the present review is to evaluate the studies investigating a possible influence of DNA repair polymorphisms in the risk of sporadic colorectal cancer and/or adenoma. Overall, no relevant common findings emerge among the studies, except for some statistically significant associations between polymorphisms in the XRCC1 and XPD genes, mainly for colorectal adenoma risk. Other individual associations remain to be confirmed. This inconclusive data may suggest that the modulation of cancer risk depends not only on a single gene/SNP, but also on a joint effect of multiple polymorphisms (or haplotypes) within different genes or pathways, in close interaction with environmental factors. The relevance of many low-penetrance genes in cancer susceptibility is supposed to be very subtle. Several reviewed association studies revealed weaknesses in their design. However, there has been a progressive improvement over the years in aspects such as simultaneous genotyping and combined analyses of different polymorphisms in larger numbers of patients and controls, as well as stratification of results by ethnicity, gender, and tumor localization. This gained experience shows that only carefully designed studies of a sufficient statistical power may resolve the relationships between polymorphisms and colorectal cancer risk.
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Affiliation(s)
- Alessio Naccarati
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Barbara Pardini
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Prague, Czech Republic; Department of Biology, University of Pisa, Italy
| | - Kari Hemminki
- German Cancer Research Center (DKFZ), Heidelberg, Germany; Department of Biosciences at Novum, Karolinska Institute, Huddinge, Sweden
| | - Pavel Vodicka
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Prague, Czech Republic.
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Flynn C, Montrose DC, Swank DL, Nakanishi M, Ilsley JNM, Rosenberg DW. Deoxycholic acid promotes the growth of colonic aberrant crypt foci. Mol Carcinog 2007; 46:60-70. [PMID: 17091474 DOI: 10.1002/mc.20253] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
AKR/J mice are resistant to the tumorigenic properties of the colon carcinogen, azoxymethane (AOM). Following AOM exposure, limited numbers of preneoplastic lesions, referred to as aberrant crypt foci (ACF), are formed in the colon, and their progression to tumors rarely occurs. To determine whether genetic resistance can be overcome by exposure to a dietary tumor promoter, AOM-exposed AKR/J mice were fed a diet containing 0.25% deoxycholic acid (DCA). DCA exposure was begun 1 wk prior to or 1 wk after tumor initiation with AOM. Mice placed on the DCA diet prior to AOM treatment developed a significantly higher multiplicity of ACF compared to AOM-exposed mice fed a control diet (15.50 +/- 0.96 vs. 6.17 +/- 0.48, respectively; P < 0.05). When DCA exposure was begun after AOM treatment (post-initiation), ACF formation was further enhanced (34.00 +/- 1.22). Interestingly, increased numbers of ACF were associated with the presence of nuclear beta-catenin, assessed by immunohistochemistry. While approximately 33% of ACF from mice exposed to DCA prior to AOM treatment contained positive nuclear beta-catenin staining, approximately 77% of ACF from mice fed DCA after AOM were positive. Accumulation of nuclear beta-catenin was not associated with a loss of E-cadherin from the plasma membrane, although loss of APC staining was a consistent feature of most AOM-induced ACF, regardless of DCA exposure. These results demonstrate that exposure to DCA, an important digestive component, is sufficient to sensitize the resistant AKR/J colon to formation of high-grade dysplasia, and that nuclear translocation of beta-catenin may play an important role in this process.
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Affiliation(s)
- Christopher Flynn
- The Carole and Ray Neag Comprehensive Cancer Center, The University of Connecticut Health Center, Farmington, Connecticut, USA
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47
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Kiefer J, Beyer-Sehlmeyer G, Pool-Zobel BL. Mixtures of SCFA, composed according to physiologically available concentrations in the gut lumen, modulate histone acetylation in human HT29 colon cancer cells. Br J Nutr 2007; 96:803-10. [PMID: 17092367 DOI: 10.1017/bjn20061948] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Intake of fibre has beneficial properties on gut health. Butyrate, a product of bacterial gut fermentation, is thought to contribute to positive effects by retarding growth and enhancing apoptosis of tumour cells. One mechanism is seen in its capacity to modulate histone acetylation and thereby transcriptional activity of genes. Next to butyrate, propionate and acetate are also major products of gut fermentation and together they may exert different potencies of cellular effects than butyrate alone. Since virtually nothing is known on combination effects by SCFA mixtures, here we had the aim to assess how physiological relevant concentrations and mixtures of SCFA modulate histone acetylation in human colon cells. HT29 colon cancer cells were incubated with mixtures of butyrate, acetate and propionate and with the individual compounds as controls. Histone acetylation was determined with acid-urea gel electrophoresis and immunoblotting. Acetylated histones slowly increased over 24 h and persisted up to 72 h in butyrate-treated HT29 cells. Butyrate (5-40 mM) and propionate (20-40 mM) enhanced histone acetylation significantly after 24 h incubation, whereas acetate (2.5-80 mM) was ineffective. Mixtures of these SCFA also modulated histone acetylation, mainly due to additive effects of butyrate and propionate, but not due to acetate. In conclusion, physiological concentrations of propionate together with butyrate could have more profound biological activities than generally assumed. Together, these SCFA could possibly mediate important processes related to an altered transcriptional gene activation and thus contribute to biological effects possibly related to cancer progression or prevention.
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Affiliation(s)
- Jeannette Kiefer
- Department of Nutritional Toxicology, Institute for Nutrition, Friedrich-Schiller-University, Dornburger Str. 25, D-07743 Jena, Germany
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48
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Knöbel Y, Weise A, Glei M, Sendt W, Claussen U, Pool-Zobel BL. Ferric iron is genotoxic in non-transformed and preneoplastic human colon cells. Food Chem Toxicol 2006; 45:804-11. [PMID: 17157427 DOI: 10.1016/j.fct.2006.10.028] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2005] [Revised: 10/09/2006] [Accepted: 10/30/2006] [Indexed: 01/13/2023]
Abstract
Iron could be a relevant risk factor for carcinogenesis since it catalyses the formation of reactive oxygen species (ROS), which damage DNA. We previously demonstrated genotoxic effects by ferric iron using the human colon cancer cell line HT29. Here we investigated ferric iron in primary non-transformed colon cells and in a preneoplastic colon adenoma cell line (LT97), which both are suitable models to study effects of carcinogens during early stages of cell transformation. Genetic damage was determined using the Comet assay. Comet FISH (fluorescence in situ hybridization) was used to assess specific effects on TP53. Fe-NTA (0-1000 microM, 30 min, 37 degrees C) significantly induced single strand breaks in primary colon cells (500 microM Fe-NTA: Tail intensity [TI] 22.6%+/-5.0% versus RPMI control: TI 10.6%+/-3.9%, p<0.01) and in LT97 cells (1000 microM Fe-NTA: TI 26.8%+/-7.3% versus RPMI control: TI 11.1%+/-3.7%, p<0.01). With the Comet FISH protocol lower concentrations of Fe-NTA significantly increased DNA damage already at 100 and 250 microM Fe-NTA in primary colon and LT97 adenoma cells, respectively. This damage was detected as an enhanced migration of TP53 signals into the comet tail in both cell types, which indicates a high susceptibility of this tumor relevant gene towards Fe-NTA. In conclusion, Fe-NTA acts genotoxic in non-transformed and in preneoplastic human colon cells, in which it also enhances migration of TP53 at relatively low concentrations. Translated to the in vivo situation these results suggest that iron overload putatively contributes to a genotoxic risk during early stages of colorectal carcinogenesis on account of its genotoxic potential in non-tumorigenic human colon cells.
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Affiliation(s)
- Y Knöbel
- Institute of Nutrition, Department of Nutritional Toxicology, Friedrich-Schiller-University, Dornburger Str. 25, 07743 Jena, Germany
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49
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Chung LWK, Huang WC, Sung SY, Wu D, Odero-Marah V, Nomura T, Shigemura K, Miyagi T, Seo S, Shi C, Molitierno J, Elmore J, Anderson C, Isotani S, Edlund M, Hsieh CL, Wang R, Shehata B, Zhau HE. Stromal-epithelial interaction in prostate cancer progression. Clin Genitourin Cancer 2006; 5:162-70. [PMID: 17026806 DOI: 10.3816/cgc.2006.n.034] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Cancer is not a single-cell disease, and its existence and behavior are constantly modulated by the host. Cancer gene expression and genetics are also highly dynamic and are regulated epigenetically by the host through gene-environment interaction. In this article, we describe the molecular pathways leading to an unusual property of cancer cells: the ability to mimic the host microenvironment and, in particular, the characteristics of osteomimicry and vasculogenic mimicry, which are likely to be regulated by soluble and insoluble factors in the tumor-adjacent microenvironment. We also discuss the importance of host inflammatory and stem cells that contribute to the growth and survival of cancer cells. By understanding the salient features of cancer-host interaction, novel therapeutics might be developed to target the cancer and its host in the treatment of lethal prostate cancer metastases.
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Affiliation(s)
- Leland W K Chung
- Molecular Urology and Therapeutics Program, Department of Urology and Winship Cancer Institute, Emory University School of Medicine, Atlanta, GA 30322, USA.
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Chell S, Kaidi A, Kadi A, Williams AC, Paraskeva C. Mediators of PGE2 synthesis and signalling downstream of COX-2 represent potential targets for the prevention/treatment of colorectal cancer. Biochim Biophys Acta Rev Cancer 2006; 1766:104-19. [PMID: 16859832 DOI: 10.1016/j.bbcan.2006.05.002] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2006] [Revised: 05/18/2006] [Accepted: 05/18/2006] [Indexed: 12/25/2022]
Abstract
Colorectal cancer is a major cause of mortality and whilst up to 80% of sporadic colorectal tumours are considered preventable, trends toward increasing obesity suggest the potential for a further increase in its worldwide incidence. Novel methods of colorectal cancer prevention and therapy are therefore of considerable importance. Non-steroidal anti-inflammatory drugs (NSAIDs) are chemopreventive against colorectal cancer, mainly through their inhibitory effects on the cyclooxygenase isoform COX-2. COX enzymes represent the committed step in prostaglandin biosynthesis and it is predominantly increased COX-2-mediated prostaglandin-E2 (PGE2) production that has a strong association with colorectal neoplasia, by promoting cell survival, cell growth, migration, invasion and angiogenesis. COX-1 and COX-2 inhibition by traditional NSAIDs (for example, aspirin) although chemopreventive have some side effects due to the role of COX-1 in maintaining the integrity of the gastric mucosa. Interestingly, the use of COX-2 selective NSAIDs has also shown promise in the prevention/treatment of colorectal cancer while having a reduced impact on the gastric mucosa. However, the prolonged use of high dose COX-2 selective inhibitors is associated with a risk of cardiovascular side effects. Whilst COX-2 inhibitors may still represent viable adjuvants to current colorectal cancer therapy, there is an urgent need to further our understanding of the downstream mechanisms by which PGE2 promotes tumorigenesis and hence identify safer, more effective strategies for the prevention of colorectal cancer. In particular, PGE2 synthases and E-prostanoid receptors (EP1-4) have recently attracted considerable interest in this area. It is hoped that at the appropriate stage, selective (and possibly combinatorial) inhibition of the synthesis and signalling of those prostaglandins most highly associated with colorectal tumorigenesis, such as PGE2, may have advantages over COX-2 selective inhibition and therefore represent more suitable targets for long-term chemoprevention. Furthermore, as COX-2 is found to be overexpressed in cancers such as breast, gastric, lung and pancreatic, these investigations may also have broad implications for the prevention/treatment of a number of other malignancies.
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Affiliation(s)
- Simon Chell
- Cancer Research UK, Colorectal Tumour Biology Group, Department of Cellular and Molecular Medicine, University Walk, The Medical School, Bristol University, Bristol BS91SB, UK
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