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Fu P, Li R, Sze SCW, Yung KKL. Associations between fine particulate matter and colorectal cancer: a systematic review and meta-analysis. REVIEWS ON ENVIRONMENTAL HEALTH 2024; 39:447-457. [PMID: 36810202 DOI: 10.1515/reveh-2022-0222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 02/08/2023] [Indexed: 06/18/2023]
Abstract
Colorectal cancer (CRC) is the second deadliest cancer worldwide. The impact of fine particulate matter (PM2.5) on many diseases is a global concern, yet its association with CRC is unclear. This study aimed to assess the effect of PM2.5 exposure on CRC. We searched PubMed, Web of Science, and Google Scholar databases for population-based articles published before September 2022, providing risk estimates with 95% confidence intervals (CI). Among 85,743 articles, we identified 10 eligible studies across multiple countries and regions in North America and Asia. We calculated the overall risk, incidence and mortality and performed subgroup analyses according to countries and regions. The results revealed an association between PM2.5 and increased risk of CRC (total risk, 1.19 [95% CI 1.12-1.28]; incidence, OR=1.18 [95% CI 1.09-1.28]; mortality, OR=1.21 [95% CI 1.09-1.35]). The elevated risks of CRC associated with PM2.5 were different across countries and regions, at 1.34 [95% CI 1.20-1.49], 1.00 [95% CI 1.00-1.00], 1.08 [95% CI 1.06-1.10], 1.18 [95% CI 1.07-1.29], 1.01 [95% CI 0.79-1.30], in the United States, China, Taiwan, Thailand, and Hong Kong, respectively. Incidence and mortality risks were higher in North America than those in Asia. In particular, the incidence and mortality were highest in the United States (1.61 [95% CI 1.38-1.89] and 1.29 [95% CI 1.17-1.42], respectively) than those in other countries. This study is the first comprehensive meta-analysis to find a strong association between PM2.5 exposure and increased CRC risk.
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Affiliation(s)
- Pengfei Fu
- Department of Biology, Faculty of Science, Hong Kong Baptist University, Hong Kong, China
- Golden Meditech Center for NeuroRegeneration Sciences, Hong Kong Baptist University, Hong Kong, China
| | - Ruijin Li
- Institute of Environmental Science, Shanxi University, Taiyuan, China
| | - Stephen Cho Wing Sze
- Department of Biology, Faculty of Science, Hong Kong Baptist University, Hong Kong, China
- Golden Meditech Center for NeuroRegeneration Sciences, Hong Kong Baptist University, Hong Kong, China
| | - Ken Kin Lam Yung
- Department of Biology, Faculty of Science, Hong Kong Baptist University, Hong Kong, China
- Golden Meditech Center for NeuroRegeneration Sciences, Hong Kong Baptist University, Hong Kong, China
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2
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Tomlinson MM, Pugh F, Nail AN, Newton JD, Udoh K, Abraham S, Kavalukas S, Guinn B, Tamimi RM, Laden F, Iyer HS, States JC, Ruther M, Ellis CT, DuPré NC. Heavy-metal associated breast cancer and colorectal cancer hot spots and their demographic and socioeconomic characteristics. Cancer Causes Control 2024:10.1007/s10552-024-01894-0. [PMID: 38916703 DOI: 10.1007/s10552-024-01894-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Accepted: 06/01/2024] [Indexed: 06/26/2024]
Abstract
PURPOSE Cancer registries offer an avenue to identify cancer clusters across large populations and efficiently examine potential environmental harms affecting cancer. The role of known metal carcinogens (i.e., cadmium, arsenic, nickel, chromium(VI)) in breast and colorectal carcinogenesis is largely unknown. Historically marginalized communities are disproportionately exposed to metals, which could explain cancer disparities. We examined area-based metal exposures and odds of residing in breast and colorectal cancer hotspots utilizing state tumor registry data and described the characteristics of those living in heavy metal-associated cancer hotspots. METHODS Breast and colorectal cancer hotspots were mapped across Kentucky, and area-based ambient metal exposure to cadmium, arsenic, nickel, and chromium(VI) were extracted from the 2014 National Air Toxics Assessment for Kentucky census tracts. Among colorectal cancer (n = 56,598) and female breast cancer (n = 77,637) diagnoses in Kentucky, we used logistic regression models to estimate Odds Ratios (ORs) and 95% Confidence Intervals to examine the association between ambient metal concentrations and odds of residing in cancer hotspots, independent of individual-level and neighborhood risk factors. RESULTS Higher ambient metal exposures were associated with higher odds of residing in breast and colorectal cancer hotspots. Populations in breast and colorectal cancer hotspots were disproportionately Black and had markers of lower socioeconomic status. Furthermore, adjusting for age, race, tobacco and neighborhood factors did not significantly change cancer hotspot ORs for ambient metal exposures analyzed. CONCLUSION Ambient metal exposures contribute to higher cancer rates in certain geographic areas that are largely composed of marginalized populations. Individual-level assessments of metal exposures and cancer disparities are needed.
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Affiliation(s)
- Madeline M Tomlinson
- Department of Epidemiology and Population Health, School of Public Health and Information Sciences, University of Louisville, 485 E Gray St, Louisville, KY, 40202, USA
| | - Felicia Pugh
- Department of Epidemiology and Population Health, School of Public Health and Information Sciences, University of Louisville, 485 E Gray St, Louisville, KY, 40202, USA
- Louisville Metro Department of Public Health and Wellness, Center for Health Equity, Louisville, KY, USA
| | - Alexandra N Nail
- Department of Pharmacology and Toxicology, School of Medicine, University of Louisville, Louisville, KY, USA
| | - Johnnie D Newton
- Department of Epidemiology and Population Health, School of Public Health and Information Sciences, University of Louisville, 485 E Gray St, Louisville, KY, 40202, USA
| | - Karen Udoh
- Department of Surgery, School of Medicine, University of Louisville, Louisville, KY, USA
| | - Stephie Abraham
- Department of Epidemiology and Population Health, School of Public Health and Information Sciences, University of Louisville, 485 E Gray St, Louisville, KY, 40202, USA
| | - Sandy Kavalukas
- Department of Surgery, School of Medicine, University of Louisville, Louisville, KY, USA
| | - Brian Guinn
- Department of Epidemiology and Population Health, School of Public Health and Information Sciences, University of Louisville, 485 E Gray St, Louisville, KY, 40202, USA
| | - Rulla M Tamimi
- Department of Population Health Sciences, Weill Cornell Medical, New York, NY, USA
| | - Francine Laden
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
- Department of Epidemiology and Department of Environmental Health, Harvard TH Chan School of Public Health, Boston, MA, USA
| | - Hari S Iyer
- Section of Cancer Epidemiology and Health Outcomes, Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA
| | - J Christopher States
- Department of Pharmacology and Toxicology, School of Medicine, University of Louisville, Louisville, KY, USA
- Center for Integrative Environmental Health Sciences, University of Louisville, Louisville, KY, USA
| | - Matthew Ruther
- Department of Urban and Public Affairs, College of Arts and Sciences, University of Louisville, Louisville, KY, USA
| | - C Tyler Ellis
- Department of Surgery, School of Medicine, University of Louisville, Louisville, KY, USA
- Center for Integrative Environmental Health Sciences, University of Louisville, Louisville, KY, USA
| | - Natalie C DuPré
- Department of Epidemiology and Population Health, School of Public Health and Information Sciences, University of Louisville, 485 E Gray St, Louisville, KY, 40202, USA.
- Center for Integrative Environmental Health Sciences, University of Louisville, Louisville, KY, USA.
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3
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Rio P, Gasbarrini A, Gambassi G, Cianci R. Pollutants, microbiota and immune system: frenemies within the gut. Front Public Health 2024; 12:1285186. [PMID: 38799688 PMCID: PMC11116734 DOI: 10.3389/fpubh.2024.1285186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 04/24/2024] [Indexed: 05/29/2024] Open
Abstract
Pollution is a critical concern of modern society for its heterogeneous effects on human health, despite a widespread lack of awareness. Environmental pollutants promote several pathologies through different molecular mechanisms. Pollutants can affect the immune system and related pathways, perturbing its regulation and triggering pro-inflammatory responses. The exposure to several pollutants also leads to alterations in gut microbiota with a decreasing abundance of beneficial microbes, such as short-chain fatty acid-producing bacteria, and an overgrowth of pro-inflammatory species. The subsequent intestinal barrier dysfunction, together with oxidative stress and increased inflammatory responses, plays a role in the pathogenesis of gastrointestinal inflammatory diseases. Moreover, pollutants encourage the inflammation-dysplasia-carcinoma sequence through various mechanisms, such as oxidative stress, dysregulation of cellular signalling pathways, cell cycle impairment and genomic instability. In this narrative review, we will describe the interplay between pollutants, gut microbiota, and the immune system, focusing on their relationship with inflammatory bowel diseases and colorectal cancer. Understanding the biological mechanisms underlying the health-to-disease transition may allow the design of public health policies aimed at reducing the burden of disease related to pollutants.
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Affiliation(s)
| | | | | | - Rossella Cianci
- Department of Translational Medicine and Surgery, Catholic University of Sacred Heart, Fondazione Policlinico Universitario A. Gemelli, IRCCS, Rome, Italy
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Xie PP, Zong ZQ, Qiao JC, Li ZY, Hu CY. Exposure to pesticides and risk of colorectal cancer: A systematic review and meta-analysis. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 345:123530. [PMID: 38341063 DOI: 10.1016/j.envpol.2024.123530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 02/03/2024] [Accepted: 02/07/2024] [Indexed: 02/12/2024]
Abstract
Colorectal cancer (CRC) is a widespread malignancy worldwide, and its relationship with pesticide exposure remains inconclusive. This study aims to elucidate the relationship between pesticide exposure and the risk of colon, rectal, or CRC, focusing on specific pesticide groups. We conducted an extensive literature search for peer-reviewed studies published up to March 31, 2023. Summary risk ratios (RR) and their corresponding 95% confidence intervals (CI) were calculated using stratified random-effects meta-analyses, taking into account different types of exposure and outcomes, and various exposed populations and pesticide subgroups. This approach aimed to address the substantial heterogeneity observed across the literature. We also assessed heterogeneity and potential small-study effects to ensure the robustness of our findings. From the 50 studies included in this review, 33 contributed to the meta-analysis. Our results indicate a significant association between herbicide exposure and colon cancer in both lifetime-days (LDs) (RR = 1.20; 95% CI = 1.01-1.42) and intensity-weighted lifetime-days (IWLDs) (RR = 1.29, 95% CI = 1.12-1.49) exposure. Similarly, insecticide exposure was associated with an increased risk of colon cancer in IWLDs (RR = 1.32; 95% CI = 1.02-1.70) exposure, and rectal cancer in any versus never exposure (RR = 1.21; 95% CI = 1.07-1.36), IDs (RR = 1.86; 95% CI = 1.30-2.67) and IWLDs (RR = 1.70; 95% CI = 1.03-2.83) exposure. While these findings suggest significant associations of herbicide and insecticide exposure with colon and rectal cancer, respectively, further research is needed to explore the impact of other pesticide groups and deepen our understanding of pesticide exposure. These results have important implications for policymakers and regulators, underscoring the need for stricter supervision and regulation of pesticide use to mitigate CRC risk.
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Affiliation(s)
- Pin-Peng Xie
- Department of Clinical Medicine, The Second School of Clinical Medicine, Anhui Medical University, 81 Meishan Road, Hefei, 230032, China
| | - Zhi-Qiang Zong
- Department of Clinical Medicine, The Second School of Clinical Medicine, Anhui Medical University, 81 Meishan Road, Hefei, 230032, China
| | - Jian-Chao Qiao
- Department of Clinical Medicine, The Second School of Clinical Medicine, Anhui Medical University, 81 Meishan Road, Hefei, 230032, China
| | - Zhuo-Yan Li
- Department of Clinical Medicine, The Second School of Clinical Medicine, Anhui Medical University, 81 Meishan Road, Hefei, 230032, China
| | - Cheng-Yang Hu
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, China; Department of Humanistic Medicine, School of Humanistic Medicine, Anhui Medical University, 81 Meishan Road, Hefei, 230032, China.
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5
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Matin S, Joukar F, Maroufizadeh S, Asgharnezhad M, Karimian P, Mansour-Ghanaei F. The frequency of colorectal lesions in the first-degree relatives of patients with colorectal lesions among PERSIAN Guilan Cohort Study population (PGCS). BMC Gastroenterol 2024; 24:88. [PMID: 38408909 PMCID: PMC10898130 DOI: 10.1186/s12876-024-03177-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Accepted: 02/16/2024] [Indexed: 02/28/2024] Open
Abstract
BACKGROUND This study aimed to investigate the frequency of colorectal lesions in the first-degree relatives of patients with colorectal lesions among the Prospective Epidemiological Research Studies in Iran (PERSIAN )Guilan Cohort Study (PGCS) population. METHODS In this cross-sectional study, 162 first-degree relatives with a history of colorectal lesions were randomly selected from 52 participants in PGCS. All subjects underwent total colonoscopy by a gastroenterologist, and a pathologist evaluated colorectal biopsies. Also, individuals' demographic information, clinical data, and dietary habits were recorded. RESULTS The mean age of the participants was 56.55 ± 7.04. Of 86 colon polyps, 52 neoplastic and 34 non-neoplastic polyps were observed in 56 patients (34.6%). Individuals with age > 60 years had 3.29-fold increased odds of developing colorectal polyps (OR = 3.29, 95% CI: 1.13-9.56, P = 0.029). The smokers were 2.73 times more susceptible to developing colorectal polyps than non-smokers (OR = 2.73, 95% CI: 1.24-6.02, P = 0.013). Moreover, consumption of vegetables more than three times per day was associated with decreased OR of colorectal polyp development (OR = 0.43, CI: 0.19-0.98, P = 0.045). CONCLUSIONS Considering the high prevalence of neoplastic colorectal polyps among the first-degree relatives of patients with colorectal lesions, early screening is recommended for individuals with a family history of colorectal lesions.
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Affiliation(s)
- Somaieh Matin
- Department of Internal Medicine, School of Medicine, Imam Khomeini Hospital, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Farahnaz Joukar
- Gastrointestinal and Liver Diseases Research Center, Guilan University of Medical Sciences, Razi Hospital, Sardar-Jangle Ave, 41448-95655, Rasht, Iran
| | - Saman Maroufizadeh
- Department of Biostatistics and Epidemiology, School of Health, Guilan University of Medical Sciences, Rasht, Iran
| | - Mehrnaz Asgharnezhad
- Gastrointestinal and Liver Diseases Research Center, Guilan University of Medical Sciences, Razi Hospital, Sardar-Jangle Ave, 41448-95655, Rasht, Iran
| | - Paridokht Karimian
- Department of Pathology, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran
| | - Fariborz Mansour-Ghanaei
- Gastrointestinal and Liver Diseases Research Center, Guilan University of Medical Sciences, Razi Hospital, Sardar-Jangle Ave, 41448-95655, Rasht, Iran.
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Ashraf SA, Mahmood D, Elkhalifa AEO, Siddiqui AJ, Khan MI, Ashfaq F, Patel M, Snoussi M, Kieliszek M, Adnan M. Exposure to pesticide residues in honey and its potential cancer risk assessment. Food Chem Toxicol 2023; 180:114014. [PMID: 37659576 DOI: 10.1016/j.fct.2023.114014] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 08/14/2023] [Accepted: 08/30/2023] [Indexed: 09/04/2023]
Abstract
Honey is the most recognized natural food by-product derived from flower nectar and the upper aero-digestive tract of the honeybees. Significance of honey for its medicinal importance are well-documented in the world's oldest medical literatures. However, the current urbanization, environmental contaminations and changes in agricultural, as well as apiculture practices has led to various types of contaminations in honey. Among all, pesticide contamination has become one of the major issues worldwide. This review focuses on the recent updates concerning pesticides occurrence in honey, as well as how the repeated use and long-term exposure to honey contaminated with pesticide residues could affect the human physiological functions, possibly leading to the development of various cancers. Our findings suggests that uncontrolled use of pesticides in farming and apiculture practices leads to the occurrence of pesticides residues in honey. Therefore, regular consumption of such honey will pose a serious threat to human health, since most of the pesticides has been reported as potential carcinogens. This review will draw the attention of honey consumers, scientific communities, apiculture farmers, as well as governing bodies to strictly monitor the pesticide usage in floriculture, agriculture as well as other related practices.
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Affiliation(s)
- Syed Amir Ashraf
- Department of Clinical Nutrition, College of Applied Medical Sciences, University of Ha'il, P.O. Box 2440, Ha'il, Saudi Arabia.
| | - Danish Mahmood
- Department of Pharmacology and Toxicology, Unaizah College of Pharmacy, Qassim University, P.O. Box 5888, Unaizah, 51911, Saudi Arabia
| | - Abd Elmoneim O Elkhalifa
- Department of Clinical Nutrition, College of Applied Medical Sciences, University of Ha'il, P.O. Box 2440, Ha'il, Saudi Arabia
| | - Arif Jamal Siddiqui
- Department of Biology, College of Science, University of Ha'il, Ha'il, P.O. Box 2440, Saudi Arabia
| | - Mohammad Idreesh Khan
- Department of Clinical Nutrition, College of Applied Health Sciences in Ar Rass, Qassim University, ArRass, 51921, Saudi Arabia
| | - Fauzia Ashfaq
- Clinical Nutrition Department, Applied Medical Sciences College, Jazan University, Jazan, 82817, Saudi Arabia
| | - Mitesh Patel
- Research and Development Cell, Department of Biotechnology, Parul Institute of Applied Sciences, Parul University, Vadodara, 391760, India
| | - Mejdi Snoussi
- Department of Biology, College of Science, University of Ha'il, Ha'il, P.O. Box 2440, Saudi Arabia
| | - Marek Kieliszek
- Department of Food Biotechnology and Microbiology, Institute of Food Sciences, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159 C, 02-776, Warsaw, Poland
| | - Mohd Adnan
- Department of Biology, College of Science, University of Ha'il, Ha'il, P.O. Box 2440, Saudi Arabia.
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Cavalier H, Trasande L, Porta M. Exposures to pesticides and risk of cancer: Evaluation of recent epidemiological evidence in humans and paths forward. Int J Cancer 2023; 152:879-912. [PMID: 36134639 PMCID: PMC9880902 DOI: 10.1002/ijc.34300] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 09/05/2022] [Accepted: 09/12/2022] [Indexed: 02/02/2023]
Abstract
Knowledge of the role in cancer etiology of environmental exposures as pesticides is a prerequisite for primary prevention. We review 63 epidemiological studies on exposure to pesticides and cancer risk in humans published from 2017 to 2021, with emphasis on new findings, methodological approaches, and gaps in the existing literature. While much of the recent evidence suggests causal relationships between pesticide exposure and cancer, the strongest evidence exists for acute myeloid leukemia (AML) and colorectal cancer (CRC), diseases in which the observed associations were consistent across several studies, including high-quality prospective studies and those using biomarkers for exposure assessment, with some observing dose-response relationships. Though high-quality studies have been published since the IARC monograph on organophosphate insecticides in 2017, there are still gaps in the literature on carcinogenic evidence in humans for a large number of pesticides. To further knowledge, we suggest leveraging new techniques and methods to increase sensitivity and precision of exposure assessment, incorporate multi-omics data, and investigate more thoroughly exposure to chemical mixtures. There is also a strong need for better and larger population-based cohort studies that include younger and nonoccupationally exposed individuals, particularly during developmental periods of susceptibility. Though the existing evidence has limitations, as always in science, there is sufficient evidence to implement policies and regulatory action that limit pesticide exposure in humans and, hence, further prevent a significant burden of cancers.
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Affiliation(s)
- Haleigh Cavalier
- Department of PediatricsNew York University (NYU) School of MedicineNew YorkNew YorkUSA
- Department of Environmental MedicineNew York University (NYU) School of MedicineNew YorkNew YorkUSA
- Department of Population HealthNew York University (NYU) School of MedicineNew YorkNew YorkUSA
| | - Leonardo Trasande
- Department of PediatricsNew York University (NYU) School of MedicineNew YorkNew YorkUSA
- Department of Environmental MedicineNew York University (NYU) School of MedicineNew YorkNew YorkUSA
- Department of Population HealthNew York University (NYU) School of MedicineNew YorkNew YorkUSA
- NYU School of Global Public HealthNew YorkNew YorkUSA
| | - Miquel Porta
- Department of PediatricsNew York University (NYU) School of MedicineNew YorkNew YorkUSA
- School of MedicineUniversitat Autònoma de BarcelonaBarcelonaSpain
- Hospital del Mar Medical Research Institute (IMIM PSMar PRBB)BarcelonaCataloniaSpain
- Department of Epidemiology, Gillings School of Global Public HealthUniversity of North Carolina at Chapel HillChapel HillNorth CarolinaUSA
- Centro de Investigación Biomédica en Red en Epidemiología y Salud Pública (CIBERESP)MadridSpain
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Bitencourt de Morais Valentim JM, Fagundes TR, Okamoto Ferreira M, Lonardoni Micheletti P, Broto Oliveira GE, Cremer Souza M, Geovana Leite Vacario B, da Silva JC, Scandolara TB, Gaboardi SC, Zanetti Pessoa Candiotto L, Mara Serpeloni J, Rodrigues Ferreira Seiva F, Panis C. Monitoring residues of pesticides in food in Brazil: A multiscale analysis of the main contaminants, dietary cancer risk estimative and mechanisms associated. Front Public Health 2023; 11:1130893. [PMID: 36908412 PMCID: PMC9992878 DOI: 10.3389/fpubh.2023.1130893] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 01/27/2023] [Indexed: 02/24/2023] Open
Abstract
Introduction Pesticides pose a risk for cancer development and progression. People are continuously exposed to such substances by several routes, including daily intake of contaminated food and water, especially in countries that are highly pesticide consumers and have very permissive legislation about pesticide contamination as Brazil. This work investigated the relationship among pesticides, food contamination, and dietary cancer risk. Methods Analyzed two social reports from the Brazilian Government: the Program for Analysis of Residues of Pesticides in Food (PARA) and The National Program for Control of Waste and Contaminants (PNCRC). Results and discussion First, we characterized the main pesticide residues detected over the maximum limits allowed by legislation or those prohibited for use in food samples analyzed across the country. Based on this list, we estimated the dietary cancer risks for some of the selected pesticides. Finally, we searched for data about dietary cancer risks and carcinogenic mechanisms of each pesticide. We also provided a critical analysis concerning the pesticide scenario in Brazil, aiming to discuss the food contamination levels observed from a geographical, political, and public health perspective. Exposures to pesticides in Brazil violate a range of human rights when food and water for human consumption are contaminated.
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Affiliation(s)
| | - Tatiane Renata Fagundes
- Department of Biological Sciences, Universidade Estadual do Norte do Paraná (UENP), Jacarezinho, Brazil
| | - Mariane Okamoto Ferreira
- Center of Health Sciences, Universidade Estadual do Oeste do Paraná (UNIOESTE), Blumenau, Brazil
| | | | | | - Milena Cremer Souza
- Department of Pathological Sciences, Universidade Estadual de Londrina (UEL), Londrina, Brazil
| | | | | | | | - Shaiane Carla Gaboardi
- Center of Health Sciences, Universidade Estadual do Oeste do Paraná (UNIOESTE), Blumenau, Brazil
- Instituto Federal Catarinense, Blumenau, Brazil
| | | | - Juliana Mara Serpeloni
- Department of Pathological Sciences, Universidade Estadual de Londrina (UEL), Londrina, Brazil
| | - Fábio Rodrigues Ferreira Seiva
- Department of Pathological Sciences, Universidade Estadual de Londrina (UEL), Londrina, Brazil
- Department of Biological Sciences, Universidade Estadual do Norte do Paraná (UENP), Jacarezinho, Brazil
| | - Carolina Panis
- Department of Pathological Sciences, Universidade Estadual de Londrina (UEL), Londrina, Brazil
- Center of Health Sciences, Universidade Estadual do Oeste do Paraná (UNIOESTE), Blumenau, Brazil
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9
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Popli S, Badgujar PC, Agarwal T, Bhushan B, Mishra V. Persistent organic pollutants in foods, their interplay with gut microbiota and resultant toxicity. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 832:155084. [PMID: 35395291 DOI: 10.1016/j.scitotenv.2022.155084] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 03/09/2022] [Accepted: 04/03/2022] [Indexed: 06/14/2023]
Abstract
Persistent Organic Pollutants (POPs) have become immensely prevalent in the environment as a result of their unique chemical properties (persistent, semi-volatile and bioaccumulative nature). Their occurrence in the soil, water and subsequently in food has become a matter of concern. With food being one of the major sources of exposure, the detrimental impact of these chemicals on the gut microbiome is inevitable. The gut microbiome is considered as an important integrant for human health. It participates in various physiological, biochemical and immunological activities; thus, affects the metabolism and physiology of the host. A myriad of studies have corroborated an association between POP-induced gut microbial dysbiosis and prevalence of disorders. For instance, ingestion of polychlorinated biphenyls, polybrominated diphenyl ethers or organochlorine pesticides influenced bile acid metabolism via alteration of bile salt hydrolase activity of Lactobacillus, Clostridium or Bacteroides genus. At the same time, some chemicals such as DDE have the potential to elevate Proteobacteria and Firmicutes/Bacteriodetes ratio influencing their metabolic activity leading to enhanced short-chain fatty acid synthesis, ensuing obesity or a pre-diabetic state. This review highlights the impact of POPs exposure on the gut microbiota composition and metabolic activity, along with an account of its corresponding consequences on the host physiology. The critical role of gut microbiota in impeding the POPs excretion out of the body resulting in their prolonged exposure and consequently, enhanced degree of toxicity is also emphasized.
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Affiliation(s)
- Shivani Popli
- Department of Basic and Applied Sciences, National Institute of Food Technology Entrepreneurship and Management, Kundli, Sonepat, Haryana 131 028, India
| | - Prarabdh C Badgujar
- Department of Food Science and Technology, National Institute of Food Technology Entrepreneurship and Management, Kundli, Sonepat, Haryana 131 028, India.
| | - Tripti Agarwal
- Department of Agriculture and Environmental Sciences, National Institute of Food Technology Entrepreneurship and Management, Kundli, Sonepat, Haryana 131 028, India
| | - Bharat Bhushan
- Department of Basic and Applied Sciences, National Institute of Food Technology Entrepreneurship and Management, Kundli, Sonepat, Haryana 131 028, India
| | - Vijendra Mishra
- Department of Basic and Applied Sciences, National Institute of Food Technology Entrepreneurship and Management, Kundli, Sonepat, Haryana 131 028, India.
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10
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Detection of Persistent Organic Pollutants in Omental Adipose Tissue from Patients with Diffuse-Gastric Cancer: A Pilot Study. Cancers (Basel) 2021; 13:cancers13194874. [PMID: 34638358 PMCID: PMC8508119 DOI: 10.3390/cancers13194874] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 09/21/2021] [Accepted: 09/26/2021] [Indexed: 12/02/2022] Open
Abstract
Simple Summary This pilot study reported the observation that great omentum could be analyzed to detect persistent organic pollutants (POPs). Diffuse gastric cancer is an increasing disease that could be associated with pollutants’ exposition. Here, we report a specific POP profile regarding a patient not affected by cancer, nor by diffuse gastric cancer or other abdominal cancers. The widespread presence of a substantial list of POPs (PCDDs/Fs, PCBs, and brominated flame retardants) was found in the omentum from patients with diffuse gastric cancer with minor presence of some organochlorine pesticides. Abstract The greater omentum represents a specific adipose tissue resected with gastric surgery for cancer. Diffuse gastric adenocarcinoma (diffuse-GC) is of major relevance among gastric cancers due to its unknown origin, aggressiveness, and metastasis in the peritoneal cavity. We postulated that persistent organic pollutants (POPs) could be detected in the greater omentum. Great omentum from patients with (i) diffuse-GC, or (ii) with other peritoneal metastatic cancer, and (iii) control group without cancer disease were analyzed for the distribution of a large panel of 96 POPs. POPs include polychlorinated dioxins/furans (PCDD/Fs), polychlorobiphenyls (PCBs), polybrominated diphenyl ethers (PBDE), polybrominated biphenyls (PBB), hexabromocyclododecanes, organochlorine pesticides, and polycyclic aromatic hydrocarbons (PAHs). The widespread presence of a substantial list of POPs (PCDDs/Fs, PCBs, and brominated flame retardants) was found in the omentum from patients with aggressive diffuse-GC, with minor presence of some organochlorine pesticides and PAHs at the low analyzed levels. Some chemicals appeared in larger concentrations in diffuse-GC or other cancer groups, including some PCDDs, PCB105, 123, 138, PBDE209, and PBB153. Overall, the present pilot study provides novel information regarding POPs levels in the omental fat, which is an understudied fat depot in terms of POPs load, and diffuse-GC association.
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Matich EK, Laryea JA, Seely KA, Stahr S, Su LJ, Hsu PC. Association between pesticide exposure and colorectal cancer risk and incidence: A systematic review. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 219:112327. [PMID: 34029839 PMCID: PMC8694176 DOI: 10.1016/j.ecoenv.2021.112327] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 05/07/2021] [Accepted: 05/08/2021] [Indexed: 05/14/2023]
Abstract
BACKGROUND Studies investigating the association between pesticide exposure and colorectal cancer (CRC) risk have been inconclusive. OBJECTIVES Investigate the association between pesticide exposure and CRC risk through a systematic literature review. METHODS CRC has the fourth-highest rate of cancer-caused death in the US after lung cancer, breast cancer in women, and prostate cancer in men. Here we have conducted a systematic literature search on studies examining the association between any pesticide exposure and CRC risk using PubMed, MEDLINE via EBSCO host, and Embase according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses checklist. RESULTS Following the review, 139 articles were included for qualitative evaluation. Study participants were farmers, pesticide applicators, pesticide manufacturers, spouses of pesticide applicators, farm residents, Korean veterans of the Vietnam War, rural communities, and those who consumed food with pesticide residues. The studies' results were split between those with significant positive (39 significant results) and inverse (41 significant results) associations when comparing pesticide exposure and CRC risk. DISCUSSION From our literature review, we have identified a similar number of significant positive and inverse associations of pesticide exposure with CRC risk and therefore cannot conclude whether pesticide exposure has a positive or inverse association with CRC risk overall. However, certain pesticides such as terbufos, dicamba, trifluralin, S-ethyl dipropylthiocarbamate (EPTC), imazethapyr, chlorpyrifos, carbaryl, pendimethalin, and acetochlor are of great concern not only for their associated elevated risk of CRC, but also for the current legal usage in the United States (US). Aldicarb and dieldrin are of moderate concern for the positive associations with CRC risk, and also for the illegal usage or the detection on imported food products even though they have been banned in the US. Pesticides can linger in the soil, water, and air for weeks to years and, therefore, can lead to exposure to farmers, manufacturing workers, and those living in rural communities near these farms and factories. Approximately 60 million people in the US live in rural areas and all of the CRC mortality hotspots are within the rural communities. The CRC mortality rate is still increasing in the rural regions despite the overall decreasing of incidence and mortality of CRC elsewhere. Therefore, the results from this study on the relationship between pesticide exposure and CRC risk will help us to understand CRC health disparities.
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Affiliation(s)
- Eryn K Matich
- Department of Environmental and Occupational Health, College of Public Health, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Jonathan A Laryea
- Department of Surgery, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Kathryn A Seely
- Public Health Laboratory, Arkansas Department of Health, Little Rock, AR, USA
| | - Shelbie Stahr
- Department of Epidemiology, College of Public Health, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - L Joseph Su
- Department of Epidemiology, College of Public Health, University of Arkansas for Medical Sciences, Little Rock, AR, USA.
| | - Ping-Ching Hsu
- Department of Environmental and Occupational Health, College of Public Health, University of Arkansas for Medical Sciences, Little Rock, AR, USA.
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Mustieles V, Pérez-Carrascosa FM, León J, Lange T, Bonde JP, Gómez-Peña C, Artacho-Cordón F, Barrios-Rodríguez R, Olmedo-Requena R, Expósito J, Jiménez-Moleón JJ, Arrebola JP. Adipose Tissue Redox Microenvironment as a Potential Link between Persistent Organic Pollutants and the 16-Year Incidence of Non-hormone-Dependent Cancer. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:9926-9937. [PMID: 34180659 PMCID: PMC8474112 DOI: 10.1021/acs.est.0c08180] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
We aimed to assess the relationships among the adipose tissue's (AT) oxidative microenvironment, in situ accumulated persistent organic pollutant (POP) concentrations, and cancer development. POP and oxidative stress levels were quantified in AT samples from 382 adults recruited within the GraMo cohort (2003-2004) in Granada (Spain). The 16-year cancer incidence was ascertained by reviewing health/administrative databases. Cox-regression models and mediation analyses were performed. The enzymes superoxide dismutase (SOD) and glutathione reductase (GRd) were positively associated with the risk of non-hormone-dependent (NHD) cancer [adjusted hazard ratio (HR) 1.76; 95% confidence interval (CI): 1.17, 2.64 and HR 2.35; 95% CI: 1.41, 3.94, respectively]. After adjustment for covariates, polychlorinated biphenyl-138 (PCB-138) (HR 1.78; 95% CI: 1.03, 3.09), β-hexachlorocyclohexane (β-HCH) (HR 1.70; 95% CI: 1.09, 2.64), and hexachlorobenzene (HR 1.54; 95% CI: 1.02, 2.33) were also positively associated with the risk of NHD cancer. Although confidence intervals included the null value, probably because of the modest number of cancer cases, we observed a potential mediation effect of SOD and GRd on the associations between β-HCH and the risk of NHD tumors (percent mediated = 33 and 47%, respectively). Our results highlight the relevance of human AT's oxidative microenvironment as a predictor of future cancer risk as well as its potential mediating role on POP-related carcinogenesis. Given their novelty, these findings should be interpreted with caution and confirmed in future studies.
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Affiliation(s)
- Vicente Mustieles
- Center
for Biomedical Research (CIBM), University
of Granada, Instituto de Investigación Biosanitaria Ibs GRANADA, 18016 Granada, Spain
- Consortium
for Biomedical Research in Epidemiology and Public Health (CIBER Epidemiología
y Salud Pública, CIBERESP), 28029 Madrid, Spain
- Department
of Radiology and Physical Medicine, University
of Granada, 18016 Granada, Spain
| | - Francisco M. Pérez-Carrascosa
- Instituto
de Investigación Biosanitaria Ibs GRANADA, 18012 Granada, Spain
- Radiotherapy
and Oncology Department, University Hospital
Virgen de las Nieves Granada, 18014 Granada, Spain
| | - Josefa León
- Instituto
de Investigación Biosanitaria Ibs GRANADA, 18012 Granada, Spain
- Unidad
de
Gestión Clínica de Aparato Digestivo, Hospital Universitario San Cecilio de Granada, 18016 Granada, Spain
| | - Theis Lange
- Section
of Biostatistics, Department of Public Health, University of Copenhagen, DK-1165 Copenhagen, Denmark
| | - Jens-Peter Bonde
- Department
of Occupational and Environmental Medicine, Bispebjerg University Hospital, Bispebjerg Bakke 23F, 2400 Copenhagen NV, Denmark
| | - Celia Gómez-Peña
- Instituto
de Investigación Biosanitaria Ibs GRANADA, 18012 Granada, Spain
- Unidad
de
Gestión Clínica de Aparato Digestivo, Hospital Universitario San Cecilio de Granada, 18016 Granada, Spain
| | - Francisco Artacho-Cordón
- Consortium
for Biomedical Research in Epidemiology and Public Health (CIBER Epidemiología
y Salud Pública, CIBERESP), 28029 Madrid, Spain
- Department
of Radiology and Physical Medicine, University
of Granada, 18016 Granada, Spain
- Instituto
de Investigación Biosanitaria Ibs GRANADA, 18012 Granada, Spain
| | - Rocío Barrios-Rodríguez
- Consortium
for Biomedical Research in Epidemiology and Public Health (CIBER Epidemiología
y Salud Pública, CIBERESP), 28029 Madrid, Spain
- Instituto
de Investigación Biosanitaria Ibs GRANADA, 18012 Granada, Spain
- Universidad
de Granada, Departamento de Medicina Preventiva
y Salud Pública, 18016 Granada, Spain
| | - Rocío Olmedo-Requena
- Consortium
for Biomedical Research in Epidemiology and Public Health (CIBER Epidemiología
y Salud Pública, CIBERESP), 28029 Madrid, Spain
- Instituto
de Investigación Biosanitaria Ibs GRANADA, 18012 Granada, Spain
- Universidad
de Granada, Departamento de Medicina Preventiva
y Salud Pública, 18016 Granada, Spain
| | - José Expósito
- Instituto
de Investigación Biosanitaria Ibs GRANADA, 18012 Granada, Spain
- Radiotherapy
and Oncology Department, University Hospital
Virgen de las Nieves Granada, 18014 Granada, Spain
| | - José J. Jiménez-Moleón
- Consortium
for Biomedical Research in Epidemiology and Public Health (CIBER Epidemiología
y Salud Pública, CIBERESP), 28029 Madrid, Spain
- Instituto
de Investigación Biosanitaria Ibs GRANADA, 18012 Granada, Spain
- Universidad
de Granada, Departamento de Medicina Preventiva
y Salud Pública, 18016 Granada, Spain
| | - Juan P. Arrebola
- Consortium
for Biomedical Research in Epidemiology and Public Health (CIBER Epidemiología
y Salud Pública, CIBERESP), 28029 Madrid, Spain
- Instituto
de Investigación Biosanitaria Ibs GRANADA, 18012 Granada, Spain
- Universidad
de Granada, Departamento de Medicina Preventiva
y Salud Pública, 18016 Granada, Spain
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Park EY, Kim J, Park E, Oh JK, Kim B, Lim MK. Serum concentrations of persistent organic pollutants and colorectal cancer risk: A case-cohort study within Korean National Cancer Center Community (KNCCC) cohort. CHEMOSPHERE 2021; 271:129596. [PMID: 33460900 DOI: 10.1016/j.chemosphere.2021.129596] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 11/10/2020] [Accepted: 01/04/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND & AIMS Recent prospective cohort studies have suggested that circulating persistent organic pollutants (POPs) may be associated with the development of cancers. We investigated the association between pre-diagnostic serum concentrations of POPs and colorectal cancer (CRC) risk. METHODS A case-cohort study within a community-based prospective cohort was performed, including 104 CRC cases and 235 subcohort participants. Serum concentrations of POPs were measured by high resolution gas chromatography/high-resolution mass spectrometry. Multivariable Cox proportional hazards regression models were used. RESULTS The association between serum concentrations of organochlorine pesticides (OCs) and CRC risk was significant (cis-heptachlor epoxide: 3rd tercile [HR (95% CI): 2.76 (1.25-6.07); trans-nonachlor: 2nd tercile [HR (95% CI): 3.90 (1.56-9.75)], 3rd tercile [HR (95% CI): 4.86 (1.95-12.16)]); p,p'-DDD: 2nd tercile [HR (95% CI): 6.02 (2.05-17.70)], 3rd tercile [HR (95% CI): 7.43 (2.42-22.84)]). Certain polychlorinated biphenyls (PCBs) congeners were significantly associated with CRC risk (PCB-105: 3rd tercile HR [95% CI]: 3.15 [1.38-7.19], PCB-118: 3rd tercile HR [95% CI]: 2.68 [1.22-5.92]; PCB-138: 2nd tercile [HR (95% CI): 2.51 (1.19-5.28)], 3rd tercile [HR (95% CI): 3.27 (1.50-7.12)]; PCB-153: 2nd tercile [HR (95% CI): 3.93 (1.81-8.54)], 3rd tercile [HR (95% CI): 5.02 (2.09-12.07)]; PCB-156: 2nd tercile [HR (95% CI): 2.61 (1.21-5.59)], 3rd tercile [HR (95% CI): 4.07 (1.73-9.61)]; PCB-180: 2nd tercile [HR (95% CI): 2.58 (1.15-5.78)], 3rd tercile [HR (95% CI): 4.01 (1.68-9.59)]).results CONCLUSIONS: This study suggests that serum concentrations of POPs could increase the CRC risk in the general population.
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Affiliation(s)
- Eun Young Park
- Division of Cancer Prevention & Early Detection, National Cancer Control Institute, National Cancer Center, Goyang-si, Gyeonggi-do, 10408, Republic of Korea
| | - Jinsun Kim
- Division of Cancer Prevention & Early Detection, National Cancer Control Institute, National Cancer Center, Goyang-si, Gyeonggi-do, 10408, Republic of Korea
| | - Eunjung Park
- Division of Cancer Prevention & Early Detection, National Cancer Control Institute, National Cancer Center, Goyang-si, Gyeonggi-do, 10408, Republic of Korea
| | - Jin-Kyoung Oh
- Division of Cancer Prevention & Early Detection, National Cancer Control Institute, National Cancer Center, Goyang-si, Gyeonggi-do, 10408, Republic of Korea; Department of Cancer Control and Population Health, National Cancer Center Graduate School of Cancer Science and Policy, Goyang-si, Gyeonggi-do, 10408, Republic of Korea
| | - Byungmi Kim
- Division of Cancer Prevention & Early Detection, National Cancer Control Institute, National Cancer Center, Goyang-si, Gyeonggi-do, 10408, Republic of Korea
| | - Min Kyung Lim
- Department of Cancer Control and Population Health, National Cancer Center Graduate School of Cancer Science and Policy, Goyang-si, Gyeonggi-do, 10408, Republic of Korea.
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Lakkis NA, El-Kibbi O, Osman MH. Colorectal Cancer in Lebanon: Incidence, Temporal Trends, and Comparison to Regional and Western Countries. Cancer Control 2021; 28:1073274821996869. [PMID: 33618551 PMCID: PMC8482742 DOI: 10.1177/1073274821996869] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 12/02/2020] [Accepted: 01/28/2021] [Indexed: 01/02/2023] Open
Abstract
Global trends in the incidence and mortality rates of colorectal cancer show a steady increase with significant predilection to western developed countries, possibly linking it to westernized lifestyles among other risk factors. This study aims to investigate the incidence and trends of colorectal cancer in Lebanon, a country in the Middle East and North Africa region, and to compare these rates to those in regional and western countries. Colorectal cancer incidence data were extracted from the Lebanese National Cancer Registry for the currently available years 2005 to 2016. The calculated age-standardized incidence rates and age-specific rates were expressed as per 100,000 population. The age-standardized incidence rates of colorectal cancer in Lebanon increased from 16.3 and 13.0 per 100,000 in 2005 to 23.2 and 20.2 per 100,000 in 2016, among males and females, respectively. The incidences were higher for males, and they increased with age. The annual percent change was +4.36% and +4.45%, in males and females respectively (p-value < 0.05). There was a non-statistically significant trend of decrease in recent years (since 2012 in males and since 2011 in females). The age-standardized incidence rates in Lebanon were higher than those in the majority of the regional countries, but lower than the rates in developed western countries. There were high age-specific incidence rates at age groups 40-44 and 45-49 years in Lebanon in both males and females (with significant rising temporal trend) compared to other countries, including the ones reported to have the highest colorectal cancer age-standardized incidence rate worldwide. Therefore, the burden of colorectal cancer is significant in Lebanon. This raises the necessity to develop national strategies tailored to reduce colorectal cancer incidence through promoting healthy lifestyles, raising awareness, and early detection as of 40 years of age.
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Affiliation(s)
- Najla A. Lakkis
- Department of Family Medicine, American University of Beirut Medical Center (AUBMC) Beirut, Lebanon
| | - Ola El-Kibbi
- Faculty of Medicine, American University of Beirut Medical Center (AUBMC) Beirut, Lebanon
| | - Mona H. Osman
- Department of Family Medicine, American University of Beirut Medical Center (AUBMC) Beirut, Lebanon
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15
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Goodson WH, Lowe L, Gilbertson M, Carpenter DO. Testing the low dose mixtures hypothesis from the Halifax project. REVIEWS ON ENVIRONMENTAL HEALTH 2020; 35:333-357. [PMID: 32833669 DOI: 10.1515/reveh-2020-0033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 06/02/2020] [Indexed: 05/24/2023]
Abstract
In 2013, 60 scientists, representing a larger group of 174 scientists from 26 nations, met in Halifax, Nova Scotia to consider whether - using published research - it was logical to anticipate that a mixture of chemicals, each thought to be non-carcinogenic, might act together in that mixture as a virtual carcinogen. The group identified 89 such chemicals, each one affecting one or more Hallmark(s) - collectively covering all Hallmarks of Cancer - confirming the possibility that a chemical mixture could induce all the Hallmarks and function as a virtual carcinogen, thereby supporting the concern that chemical safety research that does not evaluate mixtures, is incomplete. Based on these observations, the Halifax Project developed the Low-Dose Carcinogenesis Hypothesis which posits "…that low-dose exposures to [mixtures of] disruptive chemicals that are not individually carcinogenic may be capable of instigating and/or enabling carcinogenesis." Although testing all possible combinations of over 80,000 chemicals of commerce would be impractical, prudence requires designing a methodology to test whether low-dose chemical mixtures might be carcinogenic. As an initial step toward testing this hypothesis, we conducted a mini review of published empirical observations of biological exposures to chemical mixtures to assess what empirical data exists on which to base future research. We reviewed studies on chemical mixtures with the criteria that the studies reported both different concentrations of chemicals and mixtures composed of different chemicals. We found a paucity of research on this important question. The majority of studies reported hormone related processes and used chemical concentrations selected to facilitate studying how mixtures behave in experiments that were often removed from clinical relevance, i.e., chemicals were not studied at human-relevant concentrations. New research programs must be envisioned to enable study of how mixtures of small doses of chemicals affect human health, starting, when at all possible, from non-malignant specimens when studies are done in vitro. This research should use human relevant concentrations of chemicals, expand research beyond the historic focus on endocrine endpoints and endocrine related cancers, and specifically seek effects that arise uniquely from exposure to chemical mixtures at human-relevant concentrations.
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Affiliation(s)
- William H Goodson
- Department of Surgery, California Pacific Medical Center Research Institute, San Francisco, CA, 94115, USA
| | - Leroy Lowe
- Getting to Know Cancer (NGO), Truro, NS, B2N 1X5, Canada
| | - Michael Gilbertson
- Occupational and Environmental Health Research Group, University of Stirling, Stirling, Scotland
| | - David O Carpenter
- Institute for Health and the Environment, University at Albany, Rensselaer, NY, 12144, USA
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16
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García-Pérez J, Fernández de Larrea-Baz N, Lope V, Molina AJ, O'Callaghan-Gordo C, Alonso MH, Rodríguez-Suárez MM, Mirón-Pozo B, Alguacil J, Gómez-Acebo I, Ascunce N, Vanaclocha-Espi M, Amiano P, Chirlaque MD, Simó V, Jiménez-Moleón JJ, Tardón A, Moreno V, Castaño-Vinyals G, Martín V, Aragonés N, Pérez-Gómez B, Kogevinas M, Pollán M. Residential proximity to industrial pollution sources and colorectal cancer risk: A multicase-control study (MCC-Spain). ENVIRONMENT INTERNATIONAL 2020; 144:106055. [PMID: 32827807 DOI: 10.1016/j.envint.2020.106055] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 07/16/2020] [Accepted: 08/08/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Colorectal cancer is the third most frequent tumor in males and the second in females worldwide. In Spain, it is an important and growing health problem, and epidemiologic research focused on potential risk factors, such as environmental exposures, is necessary. OBJECTIVES To analyze the association between colorectal cancer risk and residential proximity to industries, according to pollution discharge route, industrial groups, categories of carcinogens and other toxic substances, and specific pollutants released, in the context of a population-based multicase-control study of incident cancer carried out in Spain (MCC-Spain). METHODS MCC-Spain included 557 colorectal cancer cases and 2948 controls in 11 provinces, frequency matched by sex, age, and region of residence. Distances were computed from subjects' residences to each of the 134 industries located in the study area. Logistic regression was used to estimate odds ratios (ORs) and 95% confidence intervals (95%CIs) for categories of distance (from 1 km to 3 km) to industrial facilities, adjusting for matching variables and other confounders. RESULTS Excess risk (OR; 95%CI) of colorectal cancer was detected near industries overall for all distances analyzed, from 1 km (2.03; 1.44-2.87) to 3 km (1.26; 1.00-1.59). In general, industries releasing pollutants to air showed higher excess risks than facilities releasing pollution to water. By industrial sector, excess risk (OR; 95%CI) was found near (≤3 km) production of metals (2.66; 1.77-4.00), surface treatment of metals (1.48; 1.08-2.02), glass and mineral fibers (2.06; 1.39-3.07), organic chemical industry (4.80; 3.20-7.20), inorganic chemical industry (6.74; 4.38-10.36), food/beverage sector (3.34; 2.38-4.68), and surface treatment using organic solvents (6.16; 4.06-9.36). By pollutants, the main excess risks (OR; 95%CI) were found near (≤3 km) industries releasing nonylphenol (9.19; 5.91-14.28), antimony (5.30; 3.45-8.15), naphthalene (3.11; 2.16-4.49), organotin compounds (2.64; 1.76-3.98), manganese (2.53; 1.63-3.93), dichloromethane (2.52; 1.74-3.66), and vanadium (2.49; 1.59-3.91). CONCLUSIONS Our results support the hypothesis that residing in the proximity of industries may be a risk factor for colorectal cancer.
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Affiliation(s)
- Javier García-Pérez
- Cancer and Environmental Epidemiology Unit, Department of Epidemiology and Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, Avda. Monforte de Lemos 5, 28029 Madrid, Spain; Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública - CIBERESP), Av. de Monforte de Lemos 3-5, 28029 Madrid, Spain.
| | - Nerea Fernández de Larrea-Baz
- Cancer and Environmental Epidemiology Unit, Department of Epidemiology and Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, Avda. Monforte de Lemos 5, 28029 Madrid, Spain; Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública - CIBERESP), Av. de Monforte de Lemos 3-5, 28029 Madrid, Spain.
| | - Virginia Lope
- Cancer and Environmental Epidemiology Unit, Department of Epidemiology and Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, Avda. Monforte de Lemos 5, 28029 Madrid, Spain; Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública - CIBERESP), Av. de Monforte de Lemos 3-5, 28029 Madrid, Spain.
| | - Antonio J Molina
- The Research Group in Gene - Environment and Health Interactions (GIIGAS)/Institute of Biomedicine (IBIOMED), Universidad de León, Campus Universitario de Vegazana, 24071 León, Spain; Faculty of Health Sciences, Department of Biomedical Sciences, Area of Preventive Medicine and Public Health, Universidad de León, Campus Universitario de Vegazana, 24071 León, Spain.
| | - Cristina O'Callaghan-Gordo
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública - CIBERESP), Av. de Monforte de Lemos 3-5, 28029 Madrid, Spain; Faculty of Health Sciences, Universitat Oberta de Catalunya, Rambla de Poblenou 156, 08018 Barcelona, Spain; Institute of Global Health (ISGlobal), Carrer del Rosselló 132, 08036 Barcelona, Spain; Universitat Pompeu Fabra (UPF), Campus del Mar, Carrer del Dr. Aiguader 80, 08003 Barcelona, Spain.
| | - María Henar Alonso
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública - CIBERESP), Av. de Monforte de Lemos 3-5, 28029 Madrid, Spain; Unit of Biomarkers and Susceptibility, Oncology Data Analytics Program, Catalan Institute of Oncology (ICO), Hospital Duran i Reynals, Avinguda de la Gran Via de l'Hospitalet 199-203, 08908 L'Hospitalet de Llobregat, Barcelona, Spain; Colorectal Cancer Group, ONCOBELL Program, Bellvitge Biomedical Research Institute (IDIBELL), Avinguda de la Gran Via de l'Hospitalet 199, 08908 L'Hospitalet de Llobregat, Barcelona, Spain; Department of Clinical Sciences, Faculty of Medicine, University of Barcelona, Carrer de Casanova 143, 08036 Barcelona, Spain.
| | - Marta María Rodríguez-Suárez
- Hospital Universitario Central de Asturias (HUCA), Av. Roma s/n, 33011 Oviedo, Spain; Servicio de Salud del Principado de Asturias (SESPA), Oviedo, Spain; Public Health Department, Universidad de Oviedo, 33003 Oviedo, Spain
| | - Benito Mirón-Pozo
- Service of Surgery, Hospital Universitario Clínico San Cecilio, Av. del Conocimiento s/n, 18016 Granada, Spain.
| | - Juan Alguacil
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública - CIBERESP), Av. de Monforte de Lemos 3-5, 28029 Madrid, Spain; Centro de Investigación en Recursos Naturales, Salud y Medio Ambiente (RENSMA), Universidad de Huelva, Campus Universitario de El Carmen, 21071 Huelva, Spain.
| | - Inés Gómez-Acebo
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública - CIBERESP), Av. de Monforte de Lemos 3-5, 28029 Madrid, Spain; Universidad de Cantabria - IDIVAL, Avenida Cardenal Herrera Oria s/n, 39011 Santander, Spain.
| | - Nieves Ascunce
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública - CIBERESP), Av. de Monforte de Lemos 3-5, 28029 Madrid, Spain; Navarra Public Health Institute, Calle Leyre, 15, 31003 Pamplona, Navarra; IdiSNA, Navarra Institute for Health Research, Calle Leyre 15, 31003 Pamplona, Spain.
| | - Mercedes Vanaclocha-Espi
- Cancer and Public Health Area, FISABIO - Public Health, Avda. de Catalunya 21, 46020 Valencia, Spain.
| | - Pilar Amiano
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública - CIBERESP), Av. de Monforte de Lemos 3-5, 28029 Madrid, Spain; Public Health Division of Gipuzkoa, Biodonostia Health Research Institute, Ministry of Health of the Basque Government, Paseo Dr. Beguiristain s/n, 20014 San Sebastian, Spain.
| | - María Dolores Chirlaque
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública - CIBERESP), Av. de Monforte de Lemos 3-5, 28029 Madrid, Spain; Department of Epidemiology, Regional Health Council, IMIB-Arrixaca, Murcia University, Campus de Ciencias de la Salud, Carretera Buenavista s/n, 30120 El Palmar, Murcia, Spain.
| | - Vicente Simó
- Department of General Surgery, León University Hospital (CAULE), Altos de Nava s/n, 24071 León, Spain.
| | - José J Jiménez-Moleón
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública - CIBERESP), Av. de Monforte de Lemos 3-5, 28029 Madrid, Spain; Department of Preventive Medicine and Public Health, School of Medicine, University of Granada, Av. de la Investigación 11, 18016 Granada, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Doctor Azpitarte 4 4ª Planta, Edificio Licinio de la Fuente, 18012 Granada, Spain.
| | - Adonina Tardón
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública - CIBERESP), Av. de Monforte de Lemos 3-5, 28029 Madrid, Spain; Instituto Universitario de Oncología (IUOPA), Universidad de Oviedo, Facultad de Medicina, Campus de El Cristo B, 33006 Oviedo, Spain; Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Av. Roma s/n, 33011 Oviedo, Spain.
| | - Víctor Moreno
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública - CIBERESP), Av. de Monforte de Lemos 3-5, 28029 Madrid, Spain; Unit of Biomarkers and Susceptibility, Oncology Data Analytics Program, Catalan Institute of Oncology (ICO), Hospital Duran i Reynals, Avinguda de la Gran Via de l'Hospitalet 199-203, 08908 L'Hospitalet de Llobregat, Barcelona, Spain; Colorectal Cancer Group, ONCOBELL Program, Bellvitge Biomedical Research Institute (IDIBELL), Avinguda de la Gran Via de l'Hospitalet 199, 08908 L'Hospitalet de Llobregat, Barcelona, Spain; Department of Clinical Sciences, Faculty of Medicine, University of Barcelona, Carrer de Casanova 143, 08036 Barcelona, Spain.
| | - Gemma Castaño-Vinyals
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública - CIBERESP), Av. de Monforte de Lemos 3-5, 28029 Madrid, Spain; Institute of Global Health (ISGlobal), Carrer del Rosselló 132, 08036 Barcelona, Spain; Universitat Pompeu Fabra (UPF), Campus del Mar, Carrer del Dr. Aiguader 80, 08003 Barcelona, Spain; IMIM (Hospital del Mar Medical Research Institute), Carrer del Dr. Aiguader 88, 08003 Barcelona, Spain.
| | - Vicente Martín
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública - CIBERESP), Av. de Monforte de Lemos 3-5, 28029 Madrid, Spain; The Research Group in Gene - Environment and Health Interactions (GIIGAS)/Institute of Biomedicine (IBIOMED), Universidad de León, Campus Universitario de Vegazana, 24071 León, Spain; Faculty of Health Sciences, Department of Biomedical Sciences, Area of Preventive Medicine and Public Health, Universidad de León, Campus Universitario de Vegazana, 24071 León, Spain.
| | - Nuria Aragonés
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública - CIBERESP), Av. de Monforte de Lemos 3-5, 28029 Madrid, Spain; Epidemiology Section, Public Health Division, Department of Health of Madrid, C/San Martín de Porres, 6, 28035 Madrid, Spain.
| | - Beatriz Pérez-Gómez
- Cancer and Environmental Epidemiology Unit, Department of Epidemiology and Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, Avda. Monforte de Lemos 5, 28029 Madrid, Spain; Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública - CIBERESP), Av. de Monforte de Lemos 3-5, 28029 Madrid, Spain.
| | - Manolis Kogevinas
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública - CIBERESP), Av. de Monforte de Lemos 3-5, 28029 Madrid, Spain; Institute of Global Health (ISGlobal), Carrer del Rosselló 132, 08036 Barcelona, Spain; Universitat Pompeu Fabra (UPF), Campus del Mar, Carrer del Dr. Aiguader 80, 08003 Barcelona, Spain; IMIM (Hospital del Mar Medical Research Institute), Carrer del Dr. Aiguader 88, 08003 Barcelona, Spain.
| | - Marina Pollán
- Cancer and Environmental Epidemiology Unit, Department of Epidemiology and Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, Avda. Monforte de Lemos 5, 28029 Madrid, Spain; Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública - CIBERESP), Av. de Monforte de Lemos 3-5, 28029 Madrid, Spain.
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17
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Fernández-Martínez NF, Ching-López A, Olry de Labry Lima A, Salamanca-Fernández E, Pérez-Gómez B, Jiménez-Moleón JJ, Sánchez MJ, Rodríguez-Barranco M. Relationship between exposure to mixtures of persistent, bioaccumulative, and toxic chemicals and cancer risk: A systematic review. ENVIRONMENTAL RESEARCH 2020; 188:109787. [PMID: 32798941 DOI: 10.1016/j.envres.2020.109787] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 06/03/2020] [Accepted: 06/03/2020] [Indexed: 05/15/2023]
Abstract
Environmental risks are responsible for one in five of all deaths worldwide. Persistent, bioaccumulative, and toxic substances are chemicals that can subsist for decades in human tissues and the environment. They include heavy metals, organochlorines, polychlorinated biphenyls, organobromines, organofluorines, and polycyclic aromatic hydrocarbons among others. Although humans are often exposed to multiple pollutants simultaneously, their negative effects on health have generally been studied for each one separately. Among the most severe of these harmful effects is cancer. Here, to compile and analyze the available evidence on the relationship between exposure to mixtures of persistent, bioaccumulative, and toxic chemicals and the risk of developing cancer in the general population, we provide a systematic review based on the main databases (Cochrane, PubMed and Embase), together with complementary sources, using the general methodology of the PRISMA Statement. The articles analyzed were selected by two researchers working independently and their quality was evaluated by reference to the Newcastle-Ottawa scale. The initial search yielded 2379 results from the main sources of information and 22 from the complementary ones. After the article selection process, 22 were included in the final review (21 case-control studies and one cohort study). Analysis of the selected studies revealed that most of the mixtures analyzed were positively associated with risk of cancer, especially that of the breast, colon-rectum or testis, and more strongly so than each contaminant alone. In view of the possible stronger association observed with the development of cancer for some mixtures of pollutants than when each one is present separately, exposure to mixtures should also be monitored and measured, preferably in cohort designs, to complement the traditional approach to persistent, bioaccumulative, and toxic chemicals. The results presented should be taken into account in public health policies in order to strengthen the regulatory framework for cancer prevention and control.
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Affiliation(s)
- Nicolás Francisco Fernández-Martínez
- Unidad de Gestión Clínica Interniveles de Prevención, Promoción y Vigilancia de La Salud, Hospital Universitario Reina Sofía, Córdoba, Spain; Maimonides Institute for Research in Biomedicine of Cordoba (IMIBIC), Córdoba, Spain
| | - Ana Ching-López
- CIBER de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain; Andalusian School of Public Health (EASP), Granada, Spain
| | - Antonio Olry de Labry Lima
- CIBER de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain; Andalusian School of Public Health (EASP), Granada, Spain; Instituto de Investigación Biosanitaria Ibs.GRANADA, Granada, Spain
| | - Elena Salamanca-Fernández
- Andalusian School of Public Health (EASP), Granada, Spain; Instituto de Investigación Biosanitaria Ibs.GRANADA, Granada, Spain
| | - Beatriz Pérez-Gómez
- CIBER de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain; Department of Epidemiology of Chronic Diseases, National Centre for Epidemiology, Carlos III Institute of Health, Madrid, Spain
| | - José Juan Jiménez-Moleón
- CIBER de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain; Instituto de Investigación Biosanitaria Ibs.GRANADA, Granada, Spain; Department of Preventive Medicine and Public Health, University of Granada, Granada, Spain
| | - Maria José Sánchez
- CIBER de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain; Andalusian School of Public Health (EASP), Granada, Spain; Instituto de Investigación Biosanitaria Ibs.GRANADA, Granada, Spain; Department of Preventive Medicine and Public Health, University of Granada, Granada, Spain.
| | - Miguel Rodríguez-Barranco
- CIBER de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain; Andalusian School of Public Health (EASP), Granada, Spain; Instituto de Investigación Biosanitaria Ibs.GRANADA, Granada, Spain
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18
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Johanson SM, Swann JR, Umu ÖCO, Aleksandersen M, Müller MHB, Berntsen HF, Zimmer KE, Østby GC, Paulsen JE, Ropstad E. Maternal exposure to a human relevant mixture of persistent organic pollutants reduces colorectal carcinogenesis in A/J Min/+ mice. CHEMOSPHERE 2020; 252:126484. [PMID: 32199166 DOI: 10.1016/j.chemosphere.2020.126484] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 03/10/2020] [Accepted: 03/12/2020] [Indexed: 06/10/2023]
Abstract
An increased risk of developing colorectal cancer has been associated with exposure to persistent organic pollutants (POPs) and alteration in the gut bacterial community. However, there is limited understanding about the impact of maternal exposure to POPs on colorectal cancer and gut microbiota. This study characterized the influence of exposure to a human relevant mixture of POPs during gestation and lactation on colorectal cancer, intestinal metabolite composition and microbiota in the A/J Min/+ mouse model. Surprisingly, the maternal POP exposure decreased colonic tumor burden, as shown by light microscopy and histopathological evaluation, indicating a restriction of colorectal carcinogenesis. 1H nuclear magnetic resonance spectroscopy-based metabolomic analysis identified alterations in the metabolism of amino acids, lipids, glycerophospholipids and energy in intestinal tissue. In addition, 16S rRNA sequencing of gut microbiota indicated that maternal exposure modified fecal bacterial composition. In conclusion, the results showed that early-life exposure to a mixture of POPs reduced colorectal cancer initiation and promotion, possibly through modulation of the microbial and biochemical environment. Further studies should focus on the development of colorectal cancer after combined maternal and dietary exposures to environmentally relevant low-dose POP mixtures.
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Affiliation(s)
- Silje M Johanson
- Department of Production Animal Clinical Sciences, Norwegian University of Life Sciences, P.O. Box 369 Sentrum, NO-0102, Oslo, Norway.
| | - Jonathan R Swann
- Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, SW7 2AZ, United Kingdom.
| | - Özgün C O Umu
- Department of Paraclinical Sciences, Norwegian University of Life Sciences, P.O. Box 369 Sentrum, NO-0102, Oslo, Norway.
| | - Mona Aleksandersen
- Department of Preclinical Sciences and Pathology, Norwegian University of Life Sciences, P.O. Box 369 Sentrum, NO-0102, Oslo, Norway.
| | - Mette H B Müller
- Department of Paraclinical Sciences, Norwegian University of Life Sciences, P.O. Box 369 Sentrum, NO-0102, Oslo, Norway.
| | - Hanne F Berntsen
- Department of Production Animal Clinical Sciences, Norwegian University of Life Sciences, P.O. Box 369 Sentrum, NO-0102, Oslo, Norway; National Institute of Occupational Health, P.O. Box 5330 Majorstuen, NO-0304, Oslo, Norway.
| | - Karin E Zimmer
- Department of Preclinical Sciences and Pathology, Norwegian University of Life Sciences, P.O. Box 369 Sentrum, NO-0102, Oslo, Norway.
| | - Gunn C Østby
- Department of Production Animal Clinical Sciences, Norwegian University of Life Sciences, P.O. Box 369 Sentrum, NO-0102, Oslo, Norway.
| | - Jan E Paulsen
- Department of Paraclinical Sciences, Norwegian University of Life Sciences, P.O. Box 369 Sentrum, NO-0102, Oslo, Norway.
| | - Erik Ropstad
- Department of Production Animal Clinical Sciences, Norwegian University of Life Sciences, P.O. Box 369 Sentrum, NO-0102, Oslo, Norway.
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19
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Molecular Aspects of Colorectal Adenomas: The Interplay among Microenvironment, Oxidative Stress, and Predisposition. BIOMED RESEARCH INTERNATIONAL 2020; 2020:1726309. [PMID: 32258104 PMCID: PMC7102468 DOI: 10.1155/2020/1726309] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 12/23/2019] [Accepted: 12/30/2019] [Indexed: 12/11/2022]
Abstract
The development of colorectal cancer (CRC) is a multistep process initiated by a benign polyp that has the potential to evolve into in situ carcinoma through the interactions between environmental and genetic factors. CRC incidence rates are constantly increased for young adult patients presenting an advanced tumor stage. The majority of CRCs arise from colonic adenomas originating from aberrant cell proliferation of colon epithelium. Endoscopic polypectomy represents a tool for early detection and removal of polyps, although the occurrence of cancers after negative colonoscopy shows a significant incidence. It has long been recognized that the aberrant regulation of Wingless/It (Wnt)/β-Catenin signaling in the pathogenesis of colorectal cancer is supported by its critical role in the differentiation of stem cells in intestinal crypts and in the maintenance of intestinal homeostasis. For this review, we will focus on the development of adenomatous polyps through the interplay between renewal signaling in the colon epithelium and reactive oxygen species (ROS) production. The current knowledge of molecular pathology allows us to deepen the relationships between oxidative stress and other risk factors as lifestyle, microbiota, and predisposition. We underline that the chronic inflammation and ROS production in the colon epithelium can impair the Wnt/β-catenin and/or base excision repair (BER) pathways and predispose to polyp development. In fact, the coexistence of oxidative DNA damage and errors in DNA polymerase can foster C>T transitions in various types of cancer and adenomas, leading to a hypermutated phenotype of tumor cells. Moreover, the function of Adenomatous Polyposis Coli (APC) protein in regulating DNA repair is very important as therapeutic implication making DNA damaging chemotherapeutic agents more effective in CRC cells that tend to accumulate mutations. Additional studies will determine whether approaches based on Wnt inhibition would provide long-term therapeutic value in CRC, but it is clear that APC disruption plays a central role in driving and maintaining tumorigenesis.
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