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Kumari A, Singh K, Uttam G. Tenuazonic acid-induced mycotoxicosis in an immunosuppressed mouse model and its prophylaxis with cinnamaldehyde. CHEMOSPHERE 2024; 363:142812. [PMID: 39004150 DOI: 10.1016/j.chemosphere.2024.142812] [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: 03/14/2024] [Revised: 06/12/2024] [Accepted: 07/07/2024] [Indexed: 07/16/2024]
Abstract
Patients with impaired immune systems are particularly vulnerable to infections. With the increasing number of immunocompromised patients, it becomes necessary to design studies that evaluate the effects of toxic contaminants that are a part of our daily lives. Simultaneously, the management of these toxic components also becomes essential. Therefore, the present study evaluated the possible protective role of cinnamaldehyde (Cin) against tenuazonic acid-induced mycotoxicosis in the immunosuppressed murine model. Tenuazonic acid (TeA), a toxin usually produced by Alternaria species, is a common contaminant in tomato and tomato-based products. Evaluating the potential toxicity of a hazardous chemical necessitates the use of in vitro, in vivo, and in silico methods. Here, the immunomodulatory effect of TeA was assessed in vitro using mouse splenocytes. In silico docking was carried out for the tumour markers of eight organs and TeA. The haematological, histopathological, and biochemical aspects were analysed in vivo. The sub-chronic intoxication of mice with TeA showed elevated malondialdehyde, reduced catalase, and superoxide dismutase production, along with abnormal levels of aspartate aminotransferase and alanine transaminase. The treatment with Cin prevented TeA-induced alterations of antioxidant defense enzyme activities and significantly forbade TeA-induced organ damage, showing therapeutic effects and toxicity reduction in TeA-induced mycotoxicosis.
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Affiliation(s)
- Ankita Kumari
- Animal Mycology Laboratory, Department of Zoology (MMV), Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Karuna Singh
- Animal Mycology Laboratory, Department of Zoology (MMV), Banaras Hindu University, Varanasi, Uttar Pradesh, India.
| | - Gunjan Uttam
- Animal Mycology Laboratory, Department of Zoology (MMV), Banaras Hindu University, Varanasi, Uttar Pradesh, India
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2
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Wang G, Wei W, Jiang Z, Jiang J, Han J, Zhang H, Hu J, Zhang P, Li X, Chen T, He J, Li Z, Lai J, Liang H, Ning C, Ye L. Talaromyces marneffei activates the AIM2-caspase-1/-4-GSDMD axis to induce pyroptosis in hepatocytes. Virulence 2022; 13:963-979. [PMID: 35639503 PMCID: PMC9176249 DOI: 10.1080/21505594.2022.2080904] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Talaromyces marneffei tends to induce systemic infection in immunocompromised individuals, which is one of the causes of the high mortality. The underlying molecular mechanisms of T.marneffei-induced abnormal liver function are still poorly understood. In this study, we found that T.marneffei-infected patients could develop abnormal liver function, evidenced by reduced albumin and increased levels of aspartate aminotransferase (AST) and AST/alanine aminotransferase (ALT). T. marneffei-infected mice exhibited similar characteristics. In vitro investigations showed that T.marneffei induced the death of AML-12 cells. Furthermore, we determined that T.marneffei infection induced pyroptosis in hepatocytes of C57BL/6J mice and AML-12 cells, demonstrated by the increase of AIM2, caspase-1/-4, Gasdermin D(GSDMD) and pyroptosis-related cytokines in T.marneffei-infected mice/cells. Importantly, cell death was markedly suppressed in the presence of VX765 (an inhibitor of caspase-1/-4). Furthermore, in the presence of VX765, T.marneffei-induced pyroptosis was blocked. Nevertheless, necroptosis and apoptosis were also detected in infected animal model at 14 days post-infection. In conclusion, T.marneffei induces pyroptosis in hepatocytes through activation of the AIM2-caspase-1/-4-GSDMD axis, which may be an important cause of liver damage, and other death pathways including necroptosis and apoptosis may also be involved in the later stage of infection.
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Affiliation(s)
- Gang Wang
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, Guangxi, China
| | - Wudi Wei
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, Guangxi, China
| | - Zhongsheng Jiang
- Department of Infectious Diseases, Liuzhou People's Hospital, Liuzhou, Guangxi, China
| | - Junjun Jiang
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, Guangxi, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Science Institute, Guangxi Medical University, Nanning, Guangxi, China
| | - Jing Han
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, Guangxi, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Science Institute, Guangxi Medical University, Nanning, Guangxi, China
| | - Hong Zhang
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, Guangxi, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Science Institute, Guangxi Medical University, Nanning, Guangxi, China
| | - Jiaguang Hu
- Department of Infectious Diseases, Liuzhou People's Hospital, Liuzhou, Guangxi, China
| | - Peng Zhang
- Department of Infectious Diseases, Liuzhou People's Hospital, Liuzhou, Guangxi, China
| | - Xu Li
- Department of Infectious Diseases, Liuzhou People's Hospital, Liuzhou, Guangxi, China
| | - Tao Chen
- Department of Infectious Diseases, Liuzhou People's Hospital, Liuzhou, Guangxi, China
| | - Jinhao He
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, Guangxi, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Science Institute, Guangxi Medical University, Nanning, Guangxi, China
| | - Zhen Li
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, Guangxi, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Science Institute, Guangxi Medical University, Nanning, Guangxi, China
| | - Jingzhen Lai
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, Guangxi, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Science Institute, Guangxi Medical University, Nanning, Guangxi, China
| | - Hao Liang
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, Guangxi, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Science Institute, Guangxi Medical University, Nanning, Guangxi, China
| | - Chuanyi Ning
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, Guangxi, China.,Nursing College, Guangxi Medical University, Nanning, Guangxi, China
| | - Li Ye
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, Guangxi, China
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3
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Abstract
The mutational landscape of colorectal cancer (CRC) does not enable predictions to be made about the survival of patients or their response to therapy. Instead, studying the polarization and activation profiles of immune cells and stromal cells in the tumour microenvironment has been shown to be more informative, thus making CRC a prototypical example of the importance of an inflammatory microenvironment for tumorigenesis. Here, we review our current understanding of how colon cancer cells interact with their microenvironment, comprised of immune cells, stromal cells and the intestinal microbiome, to suppress or escape immune responses and how inflammatory processes shape the immune pathogenesis of CRC.
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4
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Sasazaki N, Uno S, Kokushi E, Toda K, Hasunuma H, Matsumoto D, Miyashita A, Yamato O, Okawa H, Ohtani M, Fink-Gremmels J, Taniguchi M, Takagi M. Mitigation of sterigmatocystin exposure in cattle by difructose anhydride III feed supplementation and detection of urinary sterigmatocystin and serum amyloid A concentrations. Arch Anim Breed 2021; 64:257-264. [PMID: 34189253 PMCID: PMC8223015 DOI: 10.5194/aab-64-257-2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 05/18/2021] [Indexed: 11/25/2022] Open
Abstract
We evaluated the effects of supplementing cattle feed with difructose anhydride III (DFA III) by measuring urinary sterigmatocystin (STC) concentrations using 20 Japanese Black cattle aged 9–10 months from one herd. DFA III was supplemented for 2 weeks for 10 animals, and non-treated animals served as controls. The natural STC concentration in the dietary feed was 0.06 mgkg-1 (mixture of roughage and concentrate) at the beginning of the study (Day 0). The urine STC concentration was measured using liquid chromatography with tandem mass spectrometry 1 d prior to DFA III administration, 9 and 14 d thereafter, and 9 d following supplementation cessation, concomitant with the measurement of serum amyloid A (SAA). The number of heifers in which STC was detected in the urine was low (10 %) in the DFA III group compared to that (60 %) in the control group on Day 9. After 9 d following supplementation cessation (Day 23), STC concentrations were significantly lower (P=0.032) in the DFA III group than in the control group, although there was no difference in the number of heifers in which urinary STC was detected or in SAA concentrations between the two groups. Our findings demonstrate the effect of DFA III on reducing the urinary concentration of STC in Japanese Black cattle.
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Affiliation(s)
- Naoya Sasazaki
- Joint Graduate School of Veterinary Sciences, Yamaguchi University, Yamaguchi 753-8515, Japan.,Shepherd Central Livestock Clinic, Kagoshima 899-1611, Japan
| | - Seiich Uno
- Faculty of Fisheries, Kagoshima University, Kagoshima 890-0056, Japan
| | - Emiko Kokushi
- Faculty of Fisheries, Kagoshima University, Kagoshima 890-0056, Japan
| | - Katsuki Toda
- Shepherd Central Livestock Clinic, Kagoshima 899-1611, Japan
| | | | | | - Ayaka Miyashita
- Shiiba Village Office Livestock Clinic, Shiiba 883-1601, Japan
| | - Osamu Yamato
- Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima 890-0062, Japan
| | | | - Masayuki Ohtani
- Nippon Beet Sugar Manufacturing Co., Ltd., Obihiro 080-0835, Japan
| | - Johanna Fink-Gremmels
- Faculty of Veterinary Medicine, Utrecht University, Yalelaan 104, Utrecht, the Netherlands
| | - Masayasu Taniguchi
- Joint Graduate School of Veterinary Sciences, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Mitsuhiro Takagi
- Joint Graduate School of Veterinary Sciences, Yamaguchi University, Yamaguchi 753-8515, Japan
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5
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Zingales V, Fernández-Franzón M, Ruiz MJ. Sterigmatocystin: Occurrence, toxicity and molecular mechanisms of action – A review. Food Chem Toxicol 2020; 146:111802. [DOI: 10.1016/j.fct.2020.111802] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 10/01/2020] [Accepted: 10/02/2020] [Indexed: 12/22/2022]
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6
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Mucosa microbiome of gastric lesions: Fungi and bacteria interactions. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2020; 171:195-213. [PMID: 32475522 DOI: 10.1016/bs.pmbts.2020.03.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Many components of the gastric non-Helicobacter pylori microbiota have been identified recently thanks to advances in DNA sequencing techniques. Several lines of evidence support the hypothesis that the gastric microbiome is essential for gastric disorders such as gastric cancer. Microbial interactions impact the pathophysiology of various gastric disorders. This chapter provides an overview of recent findings regarding general gastric microbial community profiling, microbial interactions in the stomach, and microbial characteristics in various gastric disorders.
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7
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Sterigmatocystin-induced cytotoxicity via oxidative stress induction in human neuroblastoma cells. Food Chem Toxicol 2020; 136:110956. [DOI: 10.1016/j.fct.2019.110956] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 10/28/2019] [Accepted: 11/06/2019] [Indexed: 11/22/2022]
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8
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Jakšić D, Šegvić Klarić M, Crnolatac I, Šijaković Vujičić N, Smrečki V, Górecki M, Pescitelli G, Piantanida I. Unique Aggregation of Sterigmatocystin in Water Yields Strong and Specific Circular Dichroism Response Allowing Highly Sensitive and Selective Monitoring of Bio-Relevant Interactions. Mar Drugs 2019; 17:E629. [PMID: 31698712 PMCID: PMC6891739 DOI: 10.3390/md17110629] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 10/30/2019] [Accepted: 11/04/2019] [Indexed: 12/28/2022] Open
Abstract
We demonstrated the hitherto unknown property of the mycotoxin sterigmatocystin (STC) to provide homogeneous solutions in aqueous medium by forming a unique aggregate type (not formed by analogous aflatoxins), characterized by exceptionally strong circular dichroism (CD) bands in the 300-400 nm range. Results showed that these CD bands do not originate from intrinsic STC chirality but are a specific property of a peculiar aggregation process similar to psi-DNA CD response. Transmission electron microscopy (TEM) experiments revealed a fine fiber network resembling a supramolecular gel structure with helical fibers. Thermodynamic studies of aggregates by differential scanning calorimetry (DSC) revealed high reversibility of the dominant aggregation process. We demonstrated that the novel STC psi-CD band at 345 nm could be applied at biorelevant conditions (100 nanomolar concentration) and even in marine-salt content conditions for specific and quantitative monitoring of STC. Also, we showed that STC strongly non-covalently interacts with ds-DNA with likely toxic effects, thus contrary to the previous belief requiring prior enzyme epoxidation.
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Affiliation(s)
- Daniela Jakšić
- Faculty of Pharmacy and Biochemistry, Department of Microbiology, University of Zagreb, Schrottova 39, 10000 Zagreb, Croatia; (D.J.); (M.Š.K.)
| | - Maja Šegvić Klarić
- Faculty of Pharmacy and Biochemistry, Department of Microbiology, University of Zagreb, Schrottova 39, 10000 Zagreb, Croatia; (D.J.); (M.Š.K.)
| | - Ivo Crnolatac
- Ruđer Bošković Institute, Bijenička c. 54, 10000 Zagreb, Croatia; (I.C.); (N.Š.V.)
| | | | - Vilko Smrečki
- Ruđer Bošković Institute, Bijenička c. 54, 10000 Zagreb, Croatia; (I.C.); (N.Š.V.)
| | - Marcin Górecki
- Department of Chemistry, University of Pisa, via Moruzzi 13, 56124 Pisa, Italy; (M.G.); (G.P.)
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52 St., 01-224 Warsaw, Poland
| | - Gennaro Pescitelli
- Department of Chemistry, University of Pisa, via Moruzzi 13, 56124 Pisa, Italy; (M.G.); (G.P.)
| | - Ivo Piantanida
- Ruđer Bošković Institute, Bijenička c. 54, 10000 Zagreb, Croatia; (I.C.); (N.Š.V.)
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9
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New sterigmatocystin-producing species of Aspergillus section Versicolores from indoor air in Croatia. Mycol Prog 2016. [DOI: 10.1007/s11557-016-1250-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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10
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Gao W, Jiang L, Ge L, Chen M, Geng C, Yang G, Li Q, Ji F, Yan Q, Zou Y, Zhong L, Liu X. Sterigmatocystin-induced oxidative DNA damage in human liver-derived cell line through lysosomal damage. Toxicol In Vitro 2015; 29:1-7. [DOI: 10.1016/j.tiv.2014.08.007] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2014] [Revised: 06/24/2014] [Accepted: 08/14/2014] [Indexed: 10/24/2022]
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11
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Measurement of sterigmatocystin concentrations in urine for monitoring the contamination of cattle feed. Toxins (Basel) 2014; 6:3117-28. [PMID: 25375815 PMCID: PMC4247257 DOI: 10.3390/toxins6113117] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Revised: 09/22/2014] [Accepted: 10/29/2014] [Indexed: 12/04/2022] Open
Abstract
This study aimed (1) at determining the levels of the fungal toxin sterigmatocystin (STC) in the feed and urine of cattle and (2) at evaluating the effects of supplementing the feed with a mycotoxin adsorbent (MA) on STC concentrations in urine. Two herds of female Japanese Black cattle were used in this study. The cattle in each herd were fed a standard ration containing rice straw from different sources and a standard concentrate; two groups of cattle from each herd (n = six per group) received the commercial MA, mixed with the concentrate or given as top-dressing, whereas a third group received no supplement and served as control. Urine and feed samples were collected at various time points throughout the experiment. STC concentrations were measured using liquid chromatography-tandem mass spectrometry (LC-TMS). STC concentrations in straw were higher in Herd 1 (range 0.15–0.24 mg/kg DM) than in Herd 2 (range <0.01–0.06 mg/kg DM). In Herd 1, STC concentrations in urine significantly declined 2 weeks after replacing the contaminated feed, whereas MA supplementation had no effect. In conclusion, mycotoxins in urine samples are useful biological markers for monitoring the systemic exposure of cattle to multiple mycotoxins, as well as evaluating the effectiveness of interventions.
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12
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Wang ZK, Yang YS, Stefka AT, Sun G, Peng LH. Review article: fungal microbiota and digestive diseases. Aliment Pharmacol Ther 2014; 39:751-66. [PMID: 24612332 DOI: 10.1111/apt.12665] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Revised: 09/16/2013] [Accepted: 01/29/2014] [Indexed: 12/12/2022]
Abstract
BACKGROUND The role of the fungal microbiota in digestive diseases is poorly defined, but is becoming better understood due to advances in metagenomics. AIM To review the gastrointestinal fungal microbiota and its relationship with digestive diseases. METHODS Search of the literature using PubMed and MEDLINE databases. Subject headings including 'fungal-bacterial interactions', 'mycotoxins', 'immunity to fungi', 'fungal infection', 'fungal microbiota', 'mycobiome' and 'digestive diseases' were used. RESULTS The fungal microbiota is an integral part of the gastrointestinal microecosystem with up to 10(6) microorganisms per gram of faeces. Next-generation sequencing of the fungal 18S rRNA gene has allowed better characterisation of the gastrointestinal mycobiome. Numerous interactions between fungi and bacteria and the complex immune response to gastrointestinal commensal or pathogenic fungi all impact on the pathophysiology of inflammatory bowel disease and other gastrointestinal inflammatory entities such as peptic ulcers. Mycotoxins generated as fungal metabolites contribute to disturbances of gastrointestinal barrier and immune functions and are associated with chronic intestinal inflammatory conditions as well as hepatocellular and oesophagogastric cancer. Systemic and gastrointestinal disease can also lead to secondary fungal infections. Fungal genomic databases and methodologies need to be further developed and will allow a much better understanding of the diversity and function of the mycobiome in gastrointestinal inflammation, tumourigenesis, liver cirrhosis and transplantation, and its alteration as a consequence of antibiotic therapy and chemotherapy. CONCLUSIONS The fungal microbiota and its metabolites impact gastrointestinal function and contribute to the pathogenesis of digestive diseases. Further metagenomic analyses of the gastrointestinal mycobiome in health and disease is needed.
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Affiliation(s)
- Z K Wang
- Department of Gastroenterology and Hepatology, Chinese PLA General Hospital, Chinese PLA Medical Academy, Beijing, China
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13
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Three new sterigmatocystin analogues from marine-derived fungus Aspergillus versicolor MF359. Appl Microbiol Biotechnol 2014; 98:3753-8. [DOI: 10.1007/s00253-013-5409-5] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 11/05/2013] [Accepted: 11/14/2013] [Indexed: 11/25/2022]
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14
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Eom SY, Yim DH, Zhang Y, Yun JK, Moon SI, Yun HY, Song YJ, Youn SJ, Hyun T, Park JS, Kim BS, Lee JY, Kim YD, Kim H. Dietary aflatoxin B1 intake, genetic polymorphisms of CYP1A2, CYP2E1, EPHX1, GSTM1, and GSTT1, and gastric cancer risk in Korean. Cancer Causes Control 2013; 24:1963-72. [PMID: 23949201 DOI: 10.1007/s10552-013-0272-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Accepted: 07/31/2013] [Indexed: 12/11/2022]
Abstract
PURPOSE We investigated the effects of aflatoxin B1 (AFB1) intake, genetic polymorphisms of AFB1 metabolic enzymes, and interactions between the polymorphisms and intake of AFB1 with regard to the risk of gastric cancer in Korean. METHODS The participants in the study included 477 gastric cancer patients and 477 age- and sex-matched control subjects. Direct interviews and a structured questionnaire were used to determine the level of exposure to AFB1, and the GoldenGate assay and multiplex polymerase chain reaction were used for genotypic analyses of the cytochrome P450 1A2 (CYP1A2), cytochrome P450 1E1, epoxide hydrolase 1, and glutathione S-transferase genes. RESULTS The probable daily intake of AFB1 was significantly higher among gastric cancer patients than among control subjects (cases vs. controls: 1.91 ± 0.87 vs. 1.65 ± 0.72 ng/kg bw/day, p < 0.0001), and increased AFB1 intake was significantly associated with an elevated risk of gastric cancer (odds ratio 1.94; 95 % confidence interval 1.43-2.63). However, genetic polymorphisms of AFB1 metabolic enzymes were not associated with gastric cancer, with the exception of CYP1A2. Moreover, there was no interaction between AFB1 intake and the genotypes of metabolic enzymes that affect gastric cancer risk. CONCLUSIONS Our results suggest that dietary AFB1 exposure might be associated with a risk of gastric cancer. However, the effect of AFB1 on gastric carcinogenesis may not be modulated by genetic polymorphisms of AFB1 metabolic enzymes.
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Affiliation(s)
- Sang-Yong Eom
- Department of Preventive Medicine and Medical Research Institute, College of Medicine, Chungbuk National University, 52 Naesudong-ro, Heungdok-gu, Cheongju, 361-763, Korea
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15
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Scientific Opinion on the risk for public and animal health related to the presence of sterigmatocystin in food and feed. EFSA J 2013. [DOI: 10.2903/j.efsa.2013.3254] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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16
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Zhang D, Cui Y, Shen H, Xing L, Cui J, Wang J, Zhang X. Sterigmatocystin-induced DNA damage triggers G2 arrest via an ATM/p53-related pathway in human gastric epithelium GES-1 cells in vitro. PLoS One 2013; 8:e65044. [PMID: 23705030 PMCID: PMC3660384 DOI: 10.1371/journal.pone.0065044] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2012] [Accepted: 04/25/2013] [Indexed: 11/18/2022] Open
Abstract
Sterigmatocystin (ST), which is commonly detected in food and feed commodities, is a mutagenic and carcinogenic mycotoxin that has been recognized as a possible human carcinogen. Our previous study showed that ST can induce G2 phase arrest in GES-1 cells in vitro and that the MAPK and PI3K signaling pathways are involved in the ST-induced G2 arrest. It is now widely accepted that DNA damage plays a critical role in the regulation of cell cycle arrest and apoptosis. In response to DNA damage, a complex signaling network is activated in eukaryotic cells to trigger cell cycle arrest and facilitate DNA repair. To further explore the molecular mechanism through which ST induces G2 arrest, the current study was designed to precisely dissect the role of DNA damage and the DNA damage sensor ataxia telangiectasia-mutated (ATM)/p53-dependent pathway in the ST-induced G2 arrest in GES-1 cells. Using the comet assay, we determined that ST induces DNA damage, as evidenced by the formation of DNA comet tails, in GES-1 cells. We also found that ST induces the activation of ATM and its downstream molecules, Chk2 and p53, in GES-1 cells. The ATM pharmacological inhibitor caffeine was found to effectively inhibit the activation of the ATM-dependent pathways and to rescue the ST-induced G2 arrest in GES-1 cells, which indicating its ATM-dependent characteristic. Moreover, the silencing of the p53 expression with siRNA effectively attenuated the ST-induced G2 arrest in GES-1 cells. We also found that ST induces apoptosis in GES-1 cells. Thus, our results show that the ST-induced DNA damage activates the ATM/53-dependent signaling pathway, which contributes to the induction of G2 arrest in GES-1 cells.
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Affiliation(s)
- Donghui Zhang
- Laboratory of Pathology, Hebei Medical University, Shijiazhuang, China
- Department of Pathology, The Second Hospital, Hebei Medical University, Shijiazhuang, China
| | - Yu Cui
- Laboratory of Pathology, Hebei Medical University, Shijiazhuang, China
| | - Haitao Shen
- Laboratory of Pathology, Hebei Medical University, Shijiazhuang, China
| | - Lingxiao Xing
- Laboratory of Pathology, Hebei Medical University, Shijiazhuang, China
| | - Jinfeng Cui
- Department of Pathology, The Second Hospital, Hebei Medical University, Shijiazhuang, China
| | - Juan Wang
- Laboratory of Pathology, Hebei Medical University, Shijiazhuang, China
| | - Xianghong Zhang
- Laboratory of Pathology, Hebei Medical University, Shijiazhuang, China
- Department of Pathology, The Second Hospital, Hebei Medical University, Shijiazhuang, China
- * E-mail:
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