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Kim M, Gunathilake M, Lee J, Oh JH, Chang HJ, Sohn DK, Shin A, Kim J. Sex-specific associations of empirically derived dietary patterns with colorectal cancer risk in a Korean population: a case‒control study. Sci Rep 2024; 14:6709. [PMID: 38509114 PMCID: PMC10954725 DOI: 10.1038/s41598-024-55524-5] [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: 08/09/2023] [Accepted: 02/24/2024] [Indexed: 03/22/2024] Open
Abstract
Dietary patterns may be a crucial modifiable factor in colorectal cancer (CRC) risk. This study aimed to examine the associations of dietary patterns derived from two methods with CRC risk in Korea. In a study of 1420 CRC patients and 2840 control participants, we obtained dietary patterns by principal component analysis (PCA) and reduced rank regression (RRR) using 33 predefined food groups. The associations between dietary patterns and CRC risk were assessed using unconditional logistic regression models to calculate odds ratios (ORs) and 95% confidence intervals (CIs). We identified two similar dietary patterns, derived from PCA 1 (prudent) and RRR (healthy), characterized by higher consumption of green/yellow vegetables, light-colored vegetables, fruits, eggs, and milk in both men and women. In women, higher prudent and healthy pattern scores were significantly associated with a lower risk of CRC (prudent, ORQ4 vs. Q1 = 0.59, 95% CI 0.40-0.86, P for trend = 0.005; healthy, ORQ4 vs. Q1 = 0.62, 95% CI 0.43-0.89, P for trend = 0.007). In men, a significant inverse association between dietary pattern and risk of rectal cancer was found only for the healthy dietary pattern (ORQ4 vs. Q1 = 0.66, 95% CI 0.45-0.97, P for trend = 0.036). Compared with the dietary pattern derived by PCA, the RRR dietary pattern had a slightly stronger association with a lower risk of distal colon cancer (ORQ4 vs. Q1 = 0.58, 95% CI 0.35-0.97, P for trend = 0.025) and rectal cancer (ORQ4 vs. Q1 = 0.29, 95% CI 0.15-0.57, P for trend < 0.001) in women. Our findings suggest cancer prevention strategies focusing on a diet rich in vegetables, fruits, eggs, and milk. Moreover, the use of both PCA and RRR methods may be advantageous to explore the associations between dietary patterns and risk of CRC.
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Affiliation(s)
- Minji Kim
- Department of Cancer Biomedical Science, National Cancer Center Graduate School of Cancer Science and Policy, Goyang-si, Gyeonggi-do, South Korea
| | - Madhawa Gunathilake
- Department of Cancer Biomedical Science, National Cancer Center Graduate School of Cancer Science and Policy, Goyang-si, Gyeonggi-do, South Korea
| | - Jeonghee Lee
- Department of Cancer Biomedical Science, National Cancer Center Graduate School of Cancer Science and Policy, Goyang-si, Gyeonggi-do, South Korea
| | - Jae Hwan Oh
- Center for Colorectal Cancer, National Cancer Center Hospital, National Cancer Center, Goyang-si, Gyeonggi-do, South Korea
| | - Hee Jin Chang
- Center for Colorectal Cancer, National Cancer Center Hospital, National Cancer Center, Goyang-si, Gyeonggi-do, South Korea
| | - Dae Kyung Sohn
- Center for Colorectal Cancer, National Cancer Center Hospital, National Cancer Center, Goyang-si, Gyeonggi-do, South Korea
| | - Aesun Shin
- Department of Preventive Medicine, Seoul National University College of Medicine, Jongno-gu, Seoul, South Korea
| | - Jeongseon Kim
- Department of Cancer Biomedical Science, National Cancer Center Graduate School of Cancer Science and Policy, Goyang-si, Gyeonggi-do, South Korea.
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Walia HK, Sharma P, Singh N, Sharma S. Synergistic polymorphic interactions of phase II metabolizing genes and their association toward lung cancer susceptibility in North Indians. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2024; 34:103-126. [PMID: 36251537 DOI: 10.1080/09603123.2022.2133095] [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: 08/12/2022] [Accepted: 10/03/2022] [Indexed: 06/16/2023]
Abstract
Lung cancer is a multifactorial carcinoma with diverse heterogeneity. Genetic variations in drug-metabolizing enzymes may lead to defective detoxification and clearance of carcinogenic compounds. The high-order gene-gene interaction has been carried out between different genotypes of Phase II detoxification genes (NQO1, SULT1A1, NAT2, and EPHX1). Our results depict the genetic combination of SULT1A1 R213H with NAT2 × 5B L161L, SULT1A1 R213H with NAT2 × 5C K268R, EPHX1 H139R and NAT2 × 5B L161L exhibit a protective effect towards lung cancer risk. Further, the triple combinations of NQO1 P187S, EPHX1 Y113H, and EPHX1 H139R; NQO1 P187S, EPHX1 Y113H, and NAT2 × 6 R197Q; NQO1 P187S, EPHX1 Y113H, and NAT2 × 7 G286E; SULT1A1 R213H, EPHX1 H139R, and NAT2 × 7 G286E suggested a two-fold increased risk of lung cancer for subjects. Genetic polymorphisms of phase II detoxifying genes (NAT2, NQO1, EPHX1, SULT1A1) are prognostic markers for lung cancer.
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Affiliation(s)
- Harleen Kaur Walia
- Department of Biotechnology, Thapar Institute of Engineering & Technology, Patiala, India
| | - Parul Sharma
- Department of Biotechnology, Thapar Institute of Engineering & Technology, Patiala, India
| | - Navneet Singh
- Department of Pulmonary Medicine, Post Graduate Institute of Medical Education & Research (PGIMER), Chandigarh, India
| | - Siddharth Sharma
- Department of Biotechnology, Thapar Institute of Engineering & Technology, Patiala, India
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El Malah T, Farag H, Awad HM, Abdelrahman MT, Shamroukh AH. Design and Click Synthesis of Novel 1- Substituted-4-(3,4-Dimethoxyphenyl)-1 H-1,2,3-Triazole Hybrids for Anticancer Evaluation and Molecular Docking. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2137205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Affiliation(s)
- Tamer El Malah
- Photochemistry Department, Chemical Industries Research Institute, National Research Centre, Cairo, Egypt
| | - Hanaa Farag
- Pesticide Chemistry Department, Chemical Industries Research Institute, National Research Centre, Cairo, Egypt
| | - Hanem Mohamed Awad
- Department of Tanning Materials and Leather Technology, National Research Centre, Cairo, Egypt
| | - Mohamad Taha Abdelrahman
- Radioisotopes Department, Nuclear Research Centre, Egyptian Atomic Energy Authority, Cairo, Egypt
| | - Ahmed Hussien Shamroukh
- Photochemistry Department, Chemical Industries Research Institute, National Research Centre, Cairo, Egypt
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Srilaxmi D, Reddy AG, Sireesha R, Rao PV, Kiran MR, Kolli D, Rao MVB. Design and Synthesis of Different Aryl Substituted 1,3,4-Oxadiazole-imidazo[1,5-a]pyridine Derivatives as Anticancer Agents. RUSS J GEN CHEM+ 2022. [DOI: 10.1134/s107036322205019x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Sireesha R, Tej MB, Poojith N, Sreenivasulu R, Musuluri M, Subbarao M. Synthesis of Substituted Aryl Incorporated Oxazolo[4,5-b]Pyridine-Triazole Derivatives: Anticancer Evaluation and Molecular Docking Studies. Polycycl Aromat Compd 2021. [DOI: 10.1080/10406638.2021.2021256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Reddymasu Sireesha
- Department of Chemistry, Acharya Nagarjuna University, Guntur, Andhra Pradesh, India
| | - Mandava Bhuvan Tej
- Department of Pharmacy, Sri Ramachandra Institute of Higher Education and Research, Porur, Chennai, Tamilnadu, India
| | | | - Reddymasu Sreenivasulu
- Department of Chemistry, University College of Engineering (Autonomous), Jawaharlal Nehru Technological University, Kakinada, Andhra Pradesh, India
| | - Murali Musuluri
- Department of Chemistry, RVR & JC College of Engineering, Guntur, Andhra Pradesh, India
| | - Mannam Subbarao
- Department of Chemistry, Acharya Nagarjuna University, Guntur, Andhra Pradesh, India
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Hajiali S, Khajavi R, Kalaee MR, Montazer M. Dual‐functioning
core@shell nanofiber strip for enhancing drinking water quality: Polysulfone/graphene oxide adsorbent core layer and polyvinylpyrrolidone/mint sacrificial shell layer. J Appl Polym Sci 2021. [DOI: 10.1002/app.51291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Affiliation(s)
- Sepideh Hajiali
- Faculty of Engineering, Department of Polymer Engineering Islamic Azad University Tehran Iran
| | - Ramin Khajavi
- Faculty of Engineering, Department of Polymer Engineering Islamic Azad University Tehran Iran
| | - Mohammad Reza Kalaee
- Faculty of Engineering, Department of Polymer Engineering Islamic Azad University Tehran Iran
- Nanotechnology Research Centre Islamic Azad University Tehran Iran
| | - Majid Montazer
- Department of Textile Engineering Amirkabir University of Technology (Tehran Polytechnic) Tehran Iran
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7
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Suma VR, Sreenivasulu R, Rao MVB, Subramanyam M, Ahsan MJ, Alluri R, Rao KRM. Design, synthesis, and biological evaluation of chalcone-linked thiazole-imidazopyridine derivatives as anticancer agents. Med Chem Res 2020. [DOI: 10.1007/s00044-020-02590-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Pragathi YJ, Sreenivasulu R, Veronica D, Raju RR. Design, Synthesis, and Biological Evaluation of 1,2,4-Thiadiazole-1,2,4-Triazole Derivatives Bearing Amide Functionality as Anticancer Agents. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2020; 46:225-232. [PMID: 32837812 PMCID: PMC7243954 DOI: 10.1007/s13369-020-04626-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 05/10/2020] [Indexed: 12/18/2022]
Abstract
A novel library of amide functionality having 1,2,4-thiadiazole-1,2,4-triazole (8a–j) analogs was designed, synthesized, and structures were characterized by 1H NMR, 13C NMR, and mass (ESI–MS) spectral data. Further, all compounds were evaluated for their anticancer activities against four different cancer cell lines including breast cancer (MCF-7, MDA MB-231), lung cancer (A549), and prostate cancer (DU-145) by MTT reduction assay method, and etoposide acts as a standard drug. The results confirmed that majority of the synthesized compounds showed moderate to potent anticancer activities aligned with four cell lines. Among the synthesized compounds, 8b, 8c, 8d, 8e, 8g and 8i displayed more potent activity along with inhibitory concentration values ranging from 0.10 ± 0.084 to 11.5 ± 6.49 µM than the standard IC50 values, which ranges from 1.91 ± 0.84 to 3.08 ± 0.135 µM, respectively.
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Affiliation(s)
- Yazala Jyothsna Pragathi
- Department of Chemistry, Acharya Nagarjuna University, Nagarjuna Nagar, Andhra Pradesh 522510 India
| | - Reddymasu Sreenivasulu
- Department of Chemistry, University College of Engineering (Autonomous), Jawaharlal Nehru Technological University, Kakinada, Andhra Pradesh 533 003 India
| | - Deekala Veronica
- Department of Chemistry, Acharya Nagarjuna University, Nagarjuna Nagar, Andhra Pradesh 522510 India
| | - Rudraraju Ramesh Raju
- Department of Chemistry, Acharya Nagarjuna University, Nagarjuna Nagar, Andhra Pradesh 522510 India
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Allafchian AR, Farajmand B, Koupaei AJ. A Paper-Based Analytical Device Based on Combination of Thin Film Microextraction and Reflection Scanometry for Sensitive Colorimetric Determination of Ni(II) in Aqueous Matrix. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2018; 100:529-535. [PMID: 29460145 DOI: 10.1007/s00128-018-2297-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2017] [Accepted: 12/29/2017] [Indexed: 06/08/2023]
Abstract
In this research, the thin film microextraction method was applied for the extraction of Ni(II) ion from aqueous matrixes. Chemically modified cellulosic filter paper with phosphorus was used as a thin film extractor. After extraction, the thin film was treated with a solution of dimethylglyoxime. The colored film was captured by flatbed scanner and the absorbance of the images was extracted by some suitable software. Under the optimum conditions and at the pH 7.0, with the sample volume of 100 mL, the stirring rate of 800 rpm, and the extraction time of 50 min, the calibration curve was obtained in the range of 0.05-5 mg/L Ni(II) (R2 = 0.989). Limit and relative standard deviation were achieved to be 18 µg/L and less than 6.7%, respectively. Relative recoveries were obtained in the range of 87%-105%. Finally, the proposed method was found to be simple and cost-effective, with adequate analytical performance for the rapid detection of Ni(II) in river and wastewater samples.
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Affiliation(s)
- Ali Reza Allafchian
- Research Institute for Nanotechnology and Advanced Material, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
| | - Bahman Farajmand
- Department of chemistry, Faculty of Science, University of Zanjan, Zanjan, Iran
| | - Amin Javaheri Koupaei
- Research Institute for Nanotechnology and Advanced Material, Isfahan University of Technology, Isfahan, 84156-83111, Iran
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Vasu KK, Digwal CS, Pandya AN, Pandya DH, Sharma JA, Patel S, Agarwal M. Imidazo[1,2- a ]pyridines linked with thiazoles/thiophene motif through keto spacer as potential cytotoxic agents and NF-κB inhibitors. Bioorg Med Chem Lett 2017; 27:5463-5466. [DOI: 10.1016/j.bmcl.2017.10.060] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 10/05/2017] [Accepted: 10/25/2017] [Indexed: 01/03/2023]
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11
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Choi M, Jo H, Park HJ, Sateesh Kumar A, Lee J, Yun J, Kim Y, Han SB, Jung JK, Cho J, Lee K, Kwak JH, Lee H. Design, synthesis, and biological evaluation of benzofuran- and 2,3-dihydrobenzofuran-2-carboxylic acid N-(substituted)phenylamide derivatives as anticancer agents and inhibitors of NF-κB. Bioorg Med Chem Lett 2015; 25:2545-9. [DOI: 10.1016/j.bmcl.2015.04.050] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 04/06/2015] [Accepted: 04/17/2015] [Indexed: 01/02/2023]
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12
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Harrison IP, Selemidis S. Understanding the biology of reactive oxygen species and their link to cancer: NADPH oxidases as novel pharmacological targets. Clin Exp Pharmacol Physiol 2015; 41:533-42. [PMID: 24738947 DOI: 10.1111/1440-1681.12238] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 04/01/2014] [Accepted: 04/02/2014] [Indexed: 12/18/2022]
Abstract
Reactive oxygen species (ROS), the cellular products of myriad physiological processes, have long been understood to lead to cellular damage if produced in excess and to be a causative factor in cancer through the oxidation and nitration of various macromolecules. Reactive oxygen species influence various hallmarks of cancer, such as cellular proliferation and angiogenesis, through the promotion of cell signalling pathways intrinsic to these processes and can also regulate the function of key immune cells, such as macrophages and regulatory T cells, which promote angiogenesis in the tumour environment. Herein we emphasize the family of NADPH oxidase enzymes as the most likely source of ROS, which promote angiogenesis and tumourigenesis through signalling pathways within endothelial, immune and tumour cells. In this review we focus on the pharmacological inhibitors of NADPH oxidases and suggest that, compared with traditional anti-oxidants, they are likely to offer better alternatives for suppression of tumour angiogenesis. Despite the emerging enthusiasm towards the use of NADPH oxidase inhibitors for cancer therapy, this field is still in its infancy; in particular, there is a glaring lack of knowledge of the roles of NADPH oxidases in in vivo animal models and in human cancers. Certainly a clearer understanding of the relevant signalling pathways influenced by NADPH oxidases during angiogenesis in cancer is likely to yield novel therapeutic approaches.
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Affiliation(s)
- Ian P Harrison
- Department of Pharmacology, Monash University, Melbourne, Vic., Australia
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13
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Raykov Z, Ivanov V, Raikova E, Galabov A. Folic Acid Role in Mutagenesis, Carcinogenesis, Prevention and Treatment of Cancer. BIOTECHNOL BIOTEC EQ 2014. [DOI: 10.1080/13102818.2004.10817133] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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14
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Xu W, Zhou Y, Hang X, Shen D. Current evidence on the relationship between CYP1B1 polymorphisms and lung cancer risk: a meta-analysis. Mol Biol Rep 2011; 39:2821-9. [PMID: 21674184 DOI: 10.1007/s11033-011-1041-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2010] [Accepted: 06/04/2011] [Indexed: 11/30/2022]
Abstract
The association between single-nucleotide polymorphisms (SNPs) of the CYP1B1 gene and lung cancer risk is still ambiguous. In this meta analysis, we assessed 10 case-control studies included 7,067 cases and 9,374 controls of the association between CYP1B1 SNPs of Leu432Val (rs1056836, 432C>G), Asn453Ser (rs1800440, 453A>G), Ala119Ser (rs1056827, 119G>T), Arg48Gly (rs10012, 48C>G) and the risk of lung cancer. Crude odds ratios (ORs) with 95% confidence intervals (CIs) were used to evaluate the strength of association between the polymorphism and lung cancer risk under codominant model, dominant model and additive model respectively. Although there were limitations, this meta analysis indicated that individuals with 432GG genotype had a 39.7% higher risk of having lung cancer than those with the 432CC genotype, and individuals with the 432G allele had a 26.3% increased risk as well. An increased risk of lung cancer of 2.13 fold was observed in individuals with 119TT genotype. For Arg48Gly, individuals with 48GG genotype had a significantly increased risk of lung cancer compared with individuals with 48CC (OR 3.859; 95% CI 2.536-5.87). Elevated risk of lung cancer were observed in dominant model (OR 2.115; 95% CI 1.653-2.705) as well. The risk of lung cancer was elevated as the frequency of G allele increased in additive model (P = 0.000). For individuals with the polymorphism at codon 453, no evidence of such association was observed. Furthermore, a possible association between the CYP1B1 polymorphism at codon 432 and the lung cancer could be detected in individuals of Caucasian origin, while a negative association was suggested in Asians and African-Americans. An increased lung cancer risk was also found in women with polymorphism at codon 453. These results are supportive for the hypothesis that the CYP1B1 432GG, 119TT and 48GG genotypes are low-penetrance risk factors for developing lung cancer, and further studies are needed to validate these associations.
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Affiliation(s)
- Wenhuan Xu
- Department of Oncology, The Fourth Affiliated Hospital of Suzhou University, Huihe Road 200, Wuxi 214000, China.
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15
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Al-Akwa AA, Shaher M, Al-Akwa S, Aleryani SL. Free radicals are present in human serum of Catha edulis Forsk (Khat) abusers. JOURNAL OF ETHNOPHARMACOLOGY 2009; 125:471-473. [PMID: 19619634 DOI: 10.1016/j.jep.2009.07.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2009] [Revised: 06/26/2009] [Accepted: 07/11/2009] [Indexed: 05/28/2023]
Abstract
OBJECTIVE Khat (Catha edulis Forsk) is a naturally occurring drug with an amphetamine-like structure and action. It has been postulated that amphetamine induces free radical formation. On this basis, we have hypothesized that Khat may promote synthesis of reactive oxygen and nitrogen species in the same way that amphetamine promotes free radical production. MATERIALS AND METHODS Forty male subjects were enrolled in two groups: those with a chronic Khat chewing habit (n=20), and those without a chewing habit (controls; n=20). Both groups were matched with regard to age. Total antioxidant capacity and cholinesterase (AChE) activity were assayed. RESULTS This study showed that Khat consumption inhibited serum free radical scavenging enzymes, resulting in significant elevations in free radical loads (p=0.01; n=20). We also showed that serum acetyl cholinesterase (AChE) was significantly inhibited in the Khat chewing group (p=0.002; n=20). CONCLUSION These results show for the first time that Khat may contribute to high levels of free radicals. In addition, the presence of pesticides in Khat leaves is implicated in the inhibition of AChE activity.
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Affiliation(s)
- Ahmed A Al-Akwa
- Department of Clinical Biochemistry and Molecular Biology, Faculty of Medicine and Health Sciences, Sana'a University, Yemen
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16
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Richardson RB. Factors that elevate the internal radionuclide and chemical retention, dose and health risks to infants and children in a radiological-nuclear emergency. RADIATION PROTECTION DOSIMETRY 2009; 134:167-180. [PMID: 19460847 DOI: 10.1093/rpd/ncp078] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The factors that influence the dose and risk to vulnerable population groups from exposure and internal uptake of chemicals are examined and, in particular, the radionuclides released in chemical, biological, radiological, nuclear and explosive events. The paper seeks to identify the areas that would benefit from further research. The intake and body burdens of carbon and calcium were assessed as surrogates for contaminants that either act like or bind to hydrocarbons (e.g. tritium and (14)C) or bone-seeking radionuclides (e.g. (90)Sr and (239)Pu). The shortest turnover times for such materials in the whole body were evaluated for the newborn: 11 d and 0.5 y for carbon and calcium, respectively. However, their biokinetic behaviour is complicated by a particularly high percentage of the gut-absorbed dietary intake of carbon (approximately 16%) and calcium (approximately 100%) that is incorporated into the soft tissue and skeleton of the growing neonate. The International Commission on Radiological Protection dose coefficients (Sv Bq(-1)) were examined for 14 radionuclides, including 9 of concern because of their potential use in radiological dispersal devices. The dose coefficients for a 3-month-old are greater than those for adults (2-56 times more for ingestion and 2-12 times for inhalation). The age-dependent dose and exposure assessment of contaminant intakes would improve by accounting for gender and growth where it is currently neglected. Health risk is evaluated as the product of the exposure and hazard factors, the latter being about 10-fold greater in infants than in adults. The exposure factor is also approximately 10-fold higher for ingestion by infants than by adults, and unity for inhalation varying with the contaminant. Qualitative and quantitative physiological and epidemiological evidence supports infants being more vulnerable to cancer and neurological deficit than older children.
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Affiliation(s)
- Richard B Richardson
- Radiation Biology and Health Physics Branch, Atomic Energy of Canada Limited (AECL), Chalk River Laboratories, Chalk River, ON, Canada.
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17
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Gresner P, Gromadzinska J, Wasowicz W. Polymorphism of selected enzymes involved in detoxification and biotransformation in relation to lung cancer. Lung Cancer 2007; 57:1-25. [PMID: 17337085 DOI: 10.1016/j.lungcan.2007.02.002] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2006] [Revised: 01/30/2007] [Accepted: 02/04/2007] [Indexed: 01/22/2023]
Abstract
Available data indicate that there are significant differences in individual susceptibility to lung cancer within the human population. It is believed to be underlie by inherited genetic predispositions related to the genetic polymorphism of several enzymes involved in the detoxification and xenobiotic metabolism. In this review, we collect and discuss the evidence reported up to date on the association between lung cancer and genetic polymorphism of cytochromes P450, N-acetyltransferase, glutathione S-transferases, microsomal epoxide hydrolase, NAD(P)H:quinone oxidoreductase, myeloperoxidase and glutathione peroxidase. All these genes might appear to be candidates for lung cancer susceptibility genes, nevertheless, the present state of the art still offers only a limited explanation of the link between such polymorphisms and increased risk of lung cancer.
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Affiliation(s)
- Peter Gresner
- Department of Toxicology and Carcinogenesis, Nofer Institute of Occupational Medicine, Lodz, Poland.
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18
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Ozturk F, Ozturk IC, Batcioglu K, Vardi N. The effect of melatonin on 7,12-dimethyl-benz[a]anthracene injury in comparison with vitamin E + selenium in mouse kidneys. Fundam Clin Pharmacol 2006; 20:359-64. [PMID: 16867019 DOI: 10.1111/j.1472-8206.2006.00419.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The aims of this study were to observe the changes in antioxidative defense enzymes and renal morphology after 7,12-dimethyl-benz[a]anthracene (7,12-DMBA) administration in mice and to investigate the possible protective effects of melatonin against 7,12-DMBA-induced renal damage in comparison with vitamin E + selenium (vit E + Se). Forty female mice were divided into four groups: control, DMBA, DMBA + vit E + Se and DMBA + melatonin. In the DMBA group, mice were given injections of 7,12-DMBA (20 mg/kg). DMBA + vit E + Se group mice received injections of 7,12-DMBA + vit E + Se (20 mg/kg + 90 mg/kg + 1.8 microg/kg). In the melatonin group, mice were given injections of 7,12-DMBA + melatonin (20 mg/kg + 4.2 mg/kg). The experiment lasted for 21 days. Mice were killed and the kidneys were taken for enzyme analyses and histologic examination. Catalase (CAT) and glutathione peroxidase (GSH-Px) activities were found significantly decreased in the DMBA group and in the DMBA + vit E + Se group when compared with the control group (P < 0.05), whereas CAT and GSH-Px activities were found significantly elevated in the DMBA + melatonin group when compared with the control (P < 0.05) and the DMBA group (P < 0.01). Exposure to DMBA resulted in tubular alterations in renal cortex. Morphometric analysis revealed proximal and distal tubular damage (P < 0.05). These alterations were found to be prevented by melatonin but not with vit E + Se administration. These results reveal that melatonin stimulates CAT and GSH-Px activities and prevents renal injury better than vit E + Se combination in mice kidneys.
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Affiliation(s)
- Feral Ozturk
- Department of Embryology and Histology, Inonu University Faculty of Medicine, Malatya, Turkey.
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Chen W, Guo P, Song J, Cao W, Bian J. The ortho hydroxy-amino group: another choice for synthesizing novel antioxidants. Bioorg Med Chem Lett 2006; 16:3582-5. [PMID: 16621555 DOI: 10.1016/j.bmcl.2006.03.091] [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: 01/20/2006] [Revised: 03/13/2006] [Accepted: 03/22/2006] [Indexed: 10/24/2022]
Abstract
Four ortho hydroxy-amino derivatives have been designed based on the structures of flavonoids to explore the effect of the ortho hydroxy-amino group on the antioxidant properties of molecules, and their bond dissociation enthalpies (BDE), ionization potentials (IP), the highest occupied molecular orbitals (HOMO), and spin densities have been calculated. The results reveal that the ortho hydroxy-amino group plays an important role in promoting the antioxidant properties of molecules because of its lowering effect on BDE, IP, and spin density. The derivatives with ortho hydroxy-amino group show stronger antioxidant activity than the derivatives with mono hydroxy or ortho dihydroxy group. Thus, the ortho hydroxy-amino group can be used as another potential functional group to synthesize novel antioxidants as guessed.
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Affiliation(s)
- Weijun Chen
- Department of Chemical Engineering, Northwest University, Xi'an 710069, China
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Zaidi SMKR, Al-Qirim TM, Hoda N, Banu N. Modulation of restraint stress induced oxidative changes in rats by antioxidant vitamins. J Nutr Biochem 2004; 14:633-6. [PMID: 14629894 DOI: 10.1016/s0955-2863(03)00117-7] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the present study we examined immobilization stress-induced antioxidant defense changes in rat plasma and also observed the antioxidant effects of pre and post vitamins A, E and C administration (15 mg/Kg of body weight) individually and in combination (vit E + C) on these alterations.Following immobilization stress the circulating activities of superoxide dismutase, catalase and glutathione-S-transferase were decreased, while the level of thiobarbituric acid reactive substances (TBARS) was increased as compared to non-stressed control rats. Post treatment with individual vitamins A, E and C (after exposure to stress) resulted in a less marked alteration of plasma TBARS levels and activities of SOD, GST and catalase as compared to pre vitamin stress or stress alone treatments. Both pre and post vitamin treatments were effective in preventing stress induced derangement of free radical metabolism with a relative dominance by latter. The combined treatment with vitamin E and C did not show any additive antioxidant effect on restraint stress induced altered free radical metabolism, rather a predominant effect similar to vitamin E alone was observed. The prevention of oxidative stress generated in response to restraint stress by the vitamins can be summarized as: vitamin (E + C) i.e. vit E > vit C > vit A, thus combined vitamin (E + C) treatment though showed maximum preventive effect, but was similar to vitamin E treatment alone, in terms of the circulating activities of SOD, GST, catalase and TBARS levels.
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Abstract
Carcinogenesis is a multistage process. At each step of this process, there are natural mechanisms protecting against development of cancer. The majority of cancers in humans is induced by carcinogenic factors present in our environment including our food. However, some natural substances present in our diet or synthesized in our cells are able to block, trap or decompose reactive oxygen species (ROS) participating in carcinogenesis. Carcinogens can also be removed from our cells. If DNA damage occurs, it is repaired in most of the cases. Unrepaired DNA alterations can be fixed as mutations in proliferating cells only and mutations of very few strategic genes can induce tumor formation, the most relevant are those activating proto-oncogenes and inactivating tumor suppressor genes. A series of mutations and/or epigenetic changes is required to drive transformation of a normal cell into malignant tumor. The apparently unrestricted growth has to be accompanied by a mechanism preserving telomeres which otherwise shorten with succeeding cell divisions leading to growth arrest. Tumor can not develop beyond the size of 1-2mm in diameter without the induction of angiogenesis which is regulated by natural inhibitors. To invade the surrounding tissues epithelial tumor cells have to lose some adhesion molecules keeping them attached to each other and to produce enzymes able to dissolve the elements of the basement membrane. On the other hand, acquisition of other adhesion molecules enables interaction of circulating tumor cells with endothelial cells facilitating extravasation and metastasis. One of the last barriers protecting against cancer is the activity of the immune system. Both innate and adaptive immunity participates in anti-tumor effects including the activity of natural killer (NK) cells, natural killer T cells, macrophages, neutrophils and eosinophils, complement, various cytokines, specific antibodies, and specific T cytotoxic cells. Upon activation neutrophils and macrophages are able to kill tumor cells but they can also release ROS, angiogenic and immunosuppressive substances. Many cytokines belonging to different families display anti-tumor activity but their role in natural anti-tumor defense remains largely to be established.
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Affiliation(s)
- Marek Jakóbisiak
- Department of Immunology, Center of Biostructure, The Medical University of Warsaw, Chalubińskiego 5, 02-004 Warsaw, Poland.
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Al-Qirim TM, Shahwan M, Zaidi KR, Uddin Q, Banu N. Effect of khat, its constituents and restraint stress on free radical metabolism of rats. JOURNAL OF ETHNOPHARMACOLOGY 2002; 83:245-250. [PMID: 12426093 DOI: 10.1016/s0378-8741(02)00251-9] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The leaves of khat (Catha edulis) are found to have stimulating and pleasurable effect and are chewed habitually by people of East Africa and Arabian Peninsula. Due to various toxic and psychostimulative effect of khat the present study was undertaken to evaluate the effect of intragastric khat alone or its major constituents flavonoids/alkaloids administration and before and after 4 h of immobilization stress in terms of alteration of free radical scavenging/metabolizing enzymes, uric acid and glucose in rats. Oral khat, alkaloid administration or 4 h restraint stress resulted in the decrease of the circulating levels of superoxide dismutase, catalase, glutathione-S-transferase and glucose with enhanced uric acid concentrations as compared with control rats. Oral treatment with flavonoid fraction of khat was found to enhance the activities of GST and catalase but showed no effect on SOD while the level of glucose was decreased and uric acid increased. The levels of these biochemical parameters were more altered in post stress khat/alkaloid treated rats than pre stress khat/alkaloid treated rats. The alteration in the levels of SOD, GST, catalase and uric acid in the pre stress khat treated rats were comparable with that of khat alone, except the level of glucose which was further decreased in pre stress khat treated rats. The flavonoid fraction of khat reduced the stress induced oxidative stress in terms of above mentioned biochemical parameters. The present study suggests that khat alone or khat/alkaloid consumption preceding stress may significantly decrease the levels of free radical metabolizing/scavenging enzymes and glucose leading to enhanced free radical concentration and toxicity of khat, which could be due to its alkaloid fraction as flavonoids were found to show antioxidant properties for oxidative stress generated during restraint stress.
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Affiliation(s)
- Tariq M Al-Qirim
- Department of Biochemistry, F/o Life Sciences, A.M.U., 202002 Aligarh, India
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Croci S, Pedrazzi G, Passeri G, Piccolo P, Ortalli I. Acetylphenylhydrazine induced haemoglobin oxidation in erythrocytes studied by Mössbauer spectroscopy. BIOCHIMICA ET BIOPHYSICA ACTA 2001; 1568:99-104. [PMID: 11731091 DOI: 10.1016/s0304-4165(01)00205-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The oxidative action of acetylphenylhydrazine (APH) on red blood cells obtained from healthy donors and from patients with breast cancer has been investigated by Mössbauer spectroscopy. Whole blood was incubated with APH for different time periods and the Mössbauer spectra of the packed red cells were recorded and compared. The evolution with time of the oxidation products has been followed. The largest difference in red cells analysis between healthy persons and patients was found after about 50 min of treatment where Mössbauer spectra of patient samples show a much broader spectral pattern due to an advanced haemoglobin oxidation.
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Affiliation(s)
- S Croci
- Instituto di Scienze Fisiche, INFM-Udr Parma, University of Parma, Italy
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Biri H, Oztürk HS, Kaçmaz M, Karaca K, Tokuçoğlu H, Durak I. Activities of DNA turnover and free radical metabolizing enzymes in cancerous human prostate tissue. Cancer Invest 1999; 17:314-9. [PMID: 10370358 DOI: 10.3109/07357909909032872] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Activities of adenosine deaminase (ADA), 5'nucleotidase (5'NT), xanthine oxidase (XO), superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), and catalase (CAT) and levels of thiobarbituric acid reagent substances (TBARS) were measured in 10 cancerous and 10 noncancerous human prostate tissues. Decreased activities of DNA turnover enzymes (ADA and 5'NT), increased activities of GSH-Px and CAT, and unchanged activities of SOD and XO were observed in cancerous prostate tissues compared with those of noncancerous ones. TBARS levels were found to be higher in cancerous tissues than noncancerous ones. In correlation analysis, mostly positive correlations were established between enzyme activities of the cancerous tissues, whereas no meaningful correlations were found between enzyme activities of the noncancerous tissues except for a positive correlation between XO and SOD. The results indicate that the activities of DNA turnover enzymes were reduced, which was possibly an attempt to lower the rate of purine catabolism, and the activities of GSH-Px and CAT enzymes were increased, probably in response to increased free radical stress occurring in cancerous prostate tissues. Increased concentrations of TBARS suggested oxidant stress and thus accelerated peroxidative reactions in the cancerous tissues, even though antioxidant defense mechanisms were activated. These findings suggest that enzymatic antioxidant systems of cancerous prostate tissues cannot sufficiently eliminate oxidant factors and prevent cellular peroxidative reactions occurring during the carcinogenic process.
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Affiliation(s)
- H Biri
- Gazi University, Medical Faculty, Urology Department, Ankara, Turkey
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Ramjiawan B, Czubryt MP, Massaeli H, Gilchrist JS, Pierce GN. Oxidation of nuclear membrane cholesterol inhibits nucleoside triphosphatase activity. Free Radic Biol Med 1997; 23:556-62. [PMID: 9215801 DOI: 10.1016/s0891-5849(97)00003-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Oxygen derived free radicals can oxidize membrane cholesterol. We have previously shown that cholesterol in the nuclear membrane can modulate nuclear nucleoside triphosphatase (NTPase) activity. Nucleocytoplasmic transport of peptides and mRNA via the nuclear pore complex may be regulated by the NTPase. The purpose of the present study was to determine if oxidation of nuclear cholesterol could alter NTPase activity. Nuclear membrane cholesterol was oxidized in situ with cholesterol oxidase (to selectively oxidize cholesterol) and NTPase activity measured. HPLC analysis confirmed the formation of cholesterol oxides. The activity of the NTPase was strikingly inhibited by cholesterol oxidase treatment. The Vmax of the NTPase was significantly decreased after cholesterol oxidase treatment but the Km value was unchanged. The sensitivity of NTPase activity to varying cholesterol oxidase concentrations also suggested that cholesterol located in the inner leaflet of the nuclear membrane appeared to be more important in the modulation of NTPase activity than that in the cytoplasmic leaflet. Our results indicate that oxidation of nuclear membrane cholesterol inhibits NTPase activity. These results have implications for peptide and mRNA flux across the nuclear membrane during conditions where lipid oxidation may be expected.
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Affiliation(s)
- B Ramjiawan
- Institute of Cardiovascular Sciences, St. Boniface General Hospital Research Centre, and the Department of Physiology, University of Manitoba, Winnipeg, Canada
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Environmental impacts associated with the application of radical-scavenging stabilizers in polymers. Polym Degrad Stab 1996. [DOI: 10.1016/0141-3910(96)00011-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Duthie SJ, Ross M, Collins AR. The influence of smoking and diet on the hypoxanthine phosphoribosyltransferase (hprt) mutant frequency in circulating T lymphocytes from a normal human population. Mutat Res 1995; 331:55-64. [PMID: 7666869 DOI: 10.1016/0027-5107(95)00051-j] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The influence of the dietary antioxidants vitamin C, alpha- and beta-carotene, lycopene, lutein/zeaxanthin, phytofluene, beta-cryptoxanthin, retinol and alpha- and gamma-tocopherol on the hypoxanthine phosphoribosyltransferase (hprt) mutant frequency in human peripheral T lymphocytes was investigated. Twenty-five male non-smokers and 27 male smokers in the age range 50-59 years were recruited. Smokers showed a significantly higher mutant frequency compared with non-smokers (X1.5, P < 0.01). In addition, there was a significant positive relationship between hprt mutant frequency and the number of cigarettes that individuals reported smoking daily (P < 0.01). Smokers showed significantly lower levels of plasma vitamin C and the carotenoid alpha-carotene than non-smokers (P < 0.01 and P < 0.05 respectively). Both hprt mutant frequency and lymphocyte plating efficiency were weakly inversely associated with plasma vitamin C levels (P < 0.07 and P < 0.06 respectively) suggesting that vitamin C may be protective against mutation at the hprt locus. This relationship was markedly stronger in smokers (P < 0.01).
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Affiliation(s)
- S J Duthie
- Rowett Research Institute, Bucksburn, Aberdeen, UK
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Banerjee S, Hawksby C, Miller S, Dahill S, Beattie AD, McColl KE. Effect of Helicobacter pylori and its eradication on gastric juice ascorbic acid. Gut 1994; 35:317-22. [PMID: 8150339 PMCID: PMC1374582 DOI: 10.1136/gut.35.3.317] [Citation(s) in RCA: 117] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The presence of ascorbic acid in gastric juice may protect against gastric carcinoma and peptic ulceration. This study examined the effect of Helicobacter pylori (H pylori) on the secretion of ascorbic acid into gastric juice by measuring fasting plasma and gastric juice ascorbic acid concentrations in patients with and without the infection and also before and after its eradication. Gastric juice ascorbic acid concentrations in 19 H pylori positive patients were significantly lower (median 2.8, range 0-28.8 micrograms/ml) than those in 10 H pylori negative controls (median 17.8, range 5.6-155.4 micrograms/ml) (p < 0.0005) despite similar plasma ascorbic acid concentrations in both groups. The median gastric juice:plasma ascorbic acid ratio in the H pylori positive patients was only 1.16 (range 0.02-6.67), compared with a median ratio of 4.87 (range 0.76-21.33) in H pylori negative controls (p < 0.01). In the patients with H pylori infection there was a significant negative correlation between the severity of the antral polymorphonuclear infiltrate and gastric juice ascorbic acid concentrations (correlation coefficient -0.52, p = 0.02). After eradication of H pylori in 11 patients, gastric juice ascorbic acid concentrations rose from 2.4 (0-12.8 micrograms/ml) to 11.2 (0-50 micrograms/ml) (p = 0.01). The median gastric juice: plasma ascorbic acid ratio also increased from 1.33 (0.05-6.67) to 2.89 (0.01-166) (p = 0.01). In conclusion, the high gastric juice:plasma ascorbic acid ratio in H pylori negative subjects shows active secretion of ascorbic acid into gastric juice. Secondly, H pylori infection causes a reversible lowering of gastric juice ascorbic acid concentrations, which may predispose to gastric carcinoma and peptic ulceration.
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Affiliation(s)
- S Banerjee
- Gastrointestinal Centre, Southern General Hospital, Glasgow
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