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Imaoka T, Tanaka S, Tomita M, Doi K, Sasatani M, Suzuki K, Yamada Y, Kakinuma S, Kai M. Human-mouse comparison of the multistage nature of radiation carcinogenesis in a mathematical model. Int J Cancer 2024; 155:1101-1111. [PMID: 38688826 DOI: 10.1002/ijc.34987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 02/19/2024] [Accepted: 04/12/2024] [Indexed: 05/02/2024]
Abstract
Mouse models are vital for assessing risk from environmental carcinogens, including ionizing radiation, yet the interspecies difference in the dose response precludes direct application of experimental evidence to humans. Herein, we take a mathematical approach to delineate the mechanism underlying the human-mouse difference in radiation-related cancer risk. We used a multistage carcinogenesis model assuming a mutational action of radiation to analyze previous data on cancer mortality in the Japanese atomic bomb survivors and in lifespan mouse experiments. Theoretically, the model predicted that exposure will chronologically shift the age-related increase in cancer risk forward by a period corresponding to the time in which the spontaneous mutational process generates the same mutational burden as that the exposure generates. This model appropriately fitted both human and mouse data and suggested a linear dose response for the time shift. The effect per dose decreased with increasing age at exposure similarly between humans and mice on a per-lifespan basis (0.72- and 0.71-fold, respectively, for every tenth lifetime). The time shift per dose was larger by two orders of magnitude in humans (7.8 and 0.046 years per Gy for humans and mice, respectively, when exposed at ~35% of their lifetime). The difference was mostly explained by the two orders of magnitude difference in spontaneous somatic mutation rates between the species plus the species-independent radiation-induced mutation rate. Thus, the findings delineate the mechanism underlying the interspecies difference in radiation-associated cancer mortality and may lead to the use of experimental evidence for risk prediction in humans.
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Affiliation(s)
- Tatsuhiko Imaoka
- Department of Radiation Effects Research, Institute for Radiological Science, National Institutes for Quantum Science and Technology, Chiba, Japan
- Institute for Quantum Life Science, National Institutes for Quantum Science and Technology, Chiba, Japan
| | - Satoshi Tanaka
- Department of Radiobiology, Institute for Environmental Sciences, Rokkasho, Japan
| | - Masanori Tomita
- Sustainable System Research Laboratory, Central Research Institute of Electric Power Industry, Chiba, Japan
| | - Kazutaka Doi
- Department of Radiation Regulatory Science Research, Institute for Radiological Science, National Institutes for Quantum Science and Technology, Chiba, Japan
| | - Megumi Sasatani
- Department of Experimental Oncology, Research Institute for Radiation Biology and Medicine, Hiroshima, Japan
| | - Keiji Suzuki
- Department of Radiation Medical Sciences, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan
| | - Yutaka Yamada
- Department of Radiation Effects Research, Institute for Radiological Science, National Institutes for Quantum Science and Technology, Chiba, Japan
| | - Shizuko Kakinuma
- Department of Radiation Effects Research, Institute for Radiological Science, National Institutes for Quantum Science and Technology, Chiba, Japan
| | - Michiaki Kai
- Department of Health Sciences, Nippon Bunri University, Oita, Japan
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Hu M, Xu J, Shi L, Shi L, Yang H, Wang Y. The p38 MAPK/snail signaling axis participates in cadmium-induced lung cancer cell migration and invasiveness. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:24042-24050. [PMID: 38436850 DOI: 10.1007/s11356-024-32746-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 02/28/2024] [Indexed: 03/05/2024]
Abstract
To determine that p38 MAPK activation contributes to the migration and invasion of lung cancer cells caused by cadmium (Cd). A549 lung cancer cell migration and invasion were assessed using a transwell plate system, and the role of p38 was determined by knocking down p38 activity with two different inhibitors of p38. The activity of p38 was measured by western blot analysis using phospho-specific p38 antibodies and normalized to blots using antibodies directed to total p38 proteins. Snail transcripts were measured using qRT-PCR. The inhibition of p38 blocked Cd-induced migration and invasion, which correlated with an increased activation of p38 as a function of dose and time. Furthermore, Cd-induced activation of p38 MAPK controlled the increase of snail mRNA expression. The p38 MAPK/snail signaling axis was involved in Cd-induced lung cancer cell migration and invasion.
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Affiliation(s)
- Mengke Hu
- Department of Epidemiology, School of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Jie Xu
- Department of Epidemiology, School of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Liqin Shi
- Department of Epidemiology, School of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Li Shi
- Department of Epidemiology, School of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Haiyan Yang
- Department of Epidemiology, School of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Yadong Wang
- Department of Toxicology, Henan Center for Disease Control and Prevention, No. 105 of South Nongye Road, Zhengzhou, 450016, China.
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Rusyn I, Wright FA. Ten years of using key characteristics of human carcinogens to organize and evaluate mechanistic evidence in IARC Monographs on the identification of carcinogenic hazards to humans: Patterns and associations. Toxicol Sci 2024; 198:141-154. [PMID: 38141214 PMCID: PMC10901152 DOI: 10.1093/toxsci/kfad134] [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] [Indexed: 12/25/2023] Open
Abstract
Systematic review and evaluation of mechanistic evidence using the Key Characteristics approach was proposed by the International Agency for Research on Cancer (IARC) in 2012 and used by the IARC Monographs Working Groups since 2015. Key Characteristics are 10 features of agents known to cause cancer in humans. From 2015 to 2022, a total of 19 Monographs (73 agents combined) used Key Characteristics for cancer hazard classification. We hypothesized that a retrospective analysis of applications of the Key Characteristics approach to cancer hazard classification using heterogenous mechanistic data on diverse agents would be informative for systematic reviews in decision-making. We extracted information on the conclusions, data types, and the role mechanistic data played in the cancer hazard classification from each Monograph. Statistical analyses identified patterns in the use of Key Characteristics, as well as trends and correlations among Key Characteristics, data types, and ultimate decisions. Despite gaps in data for many agents and Key Characteristics, several significant results emerged. Mechanistic data from in vivo animal, in vitro animal, and in vitro human studies were most impactful in concluding that an agent could cause cancer via a Key Characteristic. To exclude the involvement of a Key Characteristic, data from large-scale systematic in vitro testing programs such as ToxCast, were most informative. Overall, increased availability of systemized data streams, such as human in vitro data, would provide the basis for more confident and informed conclusions about both positive and negative associations and inform expert judgments on cancer hazard.
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Affiliation(s)
- Ivan Rusyn
- Department of Veterinary Pharmacology and Physiology, Texas A&M University, College Station, Texas 77843, USA
| | - Fred A Wright
- Department of Statistics, Bioinformatics Research Center, North Carolina State University, Raleigh, North Carolina 27606, USA
- Department of Biological Sciences, Bioinformatics Research Center, North Carolina State University, Raleigh, North Carolina 27606, USA
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Rusyn I, Wright FA. Ten Years of Using Key Characteristics of Human Carcinogens to Organize and Evaluate Mechanistic Evidence in IARC Monographs on the Identification of Carcinogenic Hazards to Humans: Patterns and Associations. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.07.11.548354. [PMID: 37503163 PMCID: PMC10369858 DOI: 10.1101/2023.07.11.548354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Systematic review and evaluation of the mechanistic evidence only recently been instituted in cancer hazard identification step of decision-making. One example of organizing and evaluating mechanistic evidence is the Key Characteristics approach of the International Agency for Research on Cancer (IARC) Monographs on the Identification of Carcinogenic Hazards to Humans. The Key Characteristics of Human Carcinogens were proposed almost 10 years ago and have been used in every IARC Monograph since 2015. We investigated the patterns and associations in the use of Key Characteristics by the independent expert Working Groups. We examined 19 Monographs (2015-2022) that evaluated 73 agents. We extracted information on the conclusions by each Working Group on the strength of evidence for agent-Key Characteristic combinations, data types that were available for decisions, and the role mechanistic data played in the final cancer hazard classification. We conducted both descriptive and association analyses within and across data types. We found that IARC Working Groups were cautious when evaluating mechanistic evidence: for only ∼13% of the agents was strong evidence assigned for any Key Characteristic. Genotoxicity and cell proliferation were most data-rich, while little evidence was available for DNA repair and immortalization Key Characteristics. Analysis of the associations among Key Characteristics revealed that only chemical's metabolic activation was significantly co-occurring with genotoxicity and cell proliferation/death. Evidence from exposed humans was limited, while mechanistic evidence from rodent studies in vivo was often available. Only genotoxicity and cell proliferation/death were strongly associated with decisions on whether mechanistic data was impactful on the final cancer hazard classification. The practice of using the Key Characteristics approach is now well-established at IARC Monographs and other government agencies and the analyses presented herein will inform the future use of mechanistic evidence in regulatory decision-making.
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Zainab N, Mehmood S, Amna Shafiq-Ur-Rehman, Munir A, Tanveer ZI, Nisa ZU, Imran M, Javed MT, Chaudhary HJ. Health risk assessment and bioaccumulation of potentially toxic metals from water, soil, and forages near coal mines of district Chakwal, Punjab, Pakistan. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2023; 45:5441-5466. [PMID: 37029254 DOI: 10.1007/s10653-023-01531-w] [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: 07/04/2022] [Accepted: 03/03/2023] [Indexed: 06/19/2023]
Abstract
Water, forages, and soil contamination with potentially toxic metals (PTMs) through anthropogenic activities has become a significant environmental concern. It is crucial to find out the level of PTMs in water, soil, and forages near industrial areas. The PTMs enter the body of living organisms through these sources and have become a potential risk for humans and animals. Therefore, the present study aims at the health risk assessment of PTMs and their accumulation in soil, water, and forages of three tehsils (Kallar Kahar, Choa Saidan Shah, and Chakwal) in district Chakwal. Samples of wastewater, soil, and forages were collected from various sites of district Chakwal. PTMs detected in the present study were cadmium (Cd), chromium (Cr), lead (Pb), zinc (Zn), cobalt (Co), copper (Cu), and nickel (Ni), and their levels were measured through atomic absorption spectrophotometer (AAs GF95 graphite furnace auto sampler). Pollution load index (PLI), bio concentration factor (BCF), soil enrichment factors (EF), daily intake value (DIM), and health risk index (HRI) in sheep, cow, and buffalo were also analyzed. The results revealed that the mean concentration (mg/L) of Cd (0.72-0.91 mg/L), Cr (1.84-2.23 mg/L), Pb (0.95-3.22 mg/L), Co (0.74-2.93 mg/L), Cu (0.84-1.96 mg/L), and Ni (1.39-4.39 mg/L) in wastewater samples was higher than permissible limits set by WHO, NEQS, WWF, USEPA, and Pakistan in all three tehsils of district Chakwal. Similarly, in soil samples, concentrations of Cd (1.21-1.95 mg/kg), Cr (38.1-56.4 mg/kg), and Ni (28.3-55.9 mg/kg) were higher than their respective threshold values. The mean concentration of PTMs in forage samples (Parthenium hysterophorus, Mentha spicata, Justicia adhatoda, Calotropis procera, Xanthium strumarium, Amaranthaceae sp.) showed that maximum values of Cd (5.35-7.55 mg/kg), Cr (5.47-7.51 mg/kg), Pb (30-36 mg/kg), and Ni (12.6-57.5 mg/kg) were beyond their safe limit set for forages. PLI, BCF, and EF were > 1.0 for almost all the PTMs. The DIM and HRI for sheep were less than < 1.0 but for cows and buffalo were > 1.0. The current study showed that soil, water, and forages near coal mines area are contaminated with PTMs which enter the food chain and pose significant harm to humans and animals. In order to prevent their dangerous concentration in the food chain, regular assessment of PTMs present in soil, forages, irrigating water, and food is recommended.
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Affiliation(s)
- Nida Zainab
- Department of Plant Sciences, Quaid-I-Azam University, Islamabad, 45320, Pakistan
| | - Shehzad Mehmood
- Department of Plant Sciences, Quaid-I-Azam University, Islamabad, 45320, Pakistan
- Department of Environmental Sciences, Comsats University Islamabad, Vehari, 61100, Pakistan
| | - Amna Shafiq-Ur-Rehman
- Department of Plant Sciences, Quaid-I-Azam University, Islamabad, 45320, Pakistan
- Department of Department of Botany, University of Okara, Okara, 53900, Pakistan
- Department of Botany, Rawalpindi Women University, 6Th Road Satellite Town, Rawalpindi, Pakistan
| | - Adeela Munir
- Department of Plant Sciences, Quaid-I-Azam University, Islamabad, 45320, Pakistan
| | | | - Zaib Un Nisa
- Cotton Research Institute, Multan, Punjab, Pakistan
| | - Muhammad Imran
- Department of Environmental Sciences, Comsats University Islamabad, Vehari, 61100, Pakistan
| | - Muhammad Tariq Javed
- Department of Botany, Government College University, Faisalabad, 38000, Pakistan
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Liu Q, Sun M, Wang T, Zhou Y, Sun M, Li H, Liu Y, Xu A. The Differential Antagonistic Ability of Curcumin against Cytotoxicity and Genotoxicity Induced by Distinct Heavy Metals. TOXICS 2023; 11:233. [PMID: 36976998 PMCID: PMC10053940 DOI: 10.3390/toxics11030233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 02/11/2023] [Accepted: 02/26/2023] [Indexed: 06/18/2023]
Abstract
Widespread heavy metal pollution has aroused severe health risks worldwide. Curcumin has been reported to play a wide-spectrum protective role for various heavy metals. However, the specificity and difference in the antagonistic ability of curcumin against distinct types of heavy metals are still largely unknown. Here, using cadmium (Cd), arsenic (As), lead (Pb), and nickel (Ni) as the typical heavy metals, we systematically compared the detoxification efficiency of curcumin on the cytotoxicity and genotoxicity elicited by different heavy metals under the same experimental conditions. Curcumin was proved to have a significant discrepant antagonistic capacity when counteracting the adverse effect of different heavy metals. Stronger protective effects of curcumin emerged when antagonizing the toxicity of Cd and As, rather than Pb and Ni. Curcumin exhibits a better detoxification ability against heavy metal-induced genotoxicity than cytotoxicity. Mechanistically, inhibiting the oxidative stress elicited by heavy metals and reducing the bioaccumulation of metal ions both contributed to the detoxification of curcumin against all the tested heavy metals. Our results illustrated that curcumin shows prominent detoxification specificity against different types of heavy metals and toxic endpoints, which provides a new clue for the better and targeted application of curcumin in heavy metal detoxification.
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Affiliation(s)
- Qiao Liu
- School of Basic Medical Sciences, Anhui Medical University, No. 81, Meishan Road, Hefei 230032, China
- Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - Mengzi Sun
- School of Basic Medical Sciences, Anhui Medical University, No. 81, Meishan Road, Hefei 230032, China
- Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - Tong Wang
- Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - Yemian Zhou
- Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - Meng Sun
- Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - Han Li
- Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - Yun Liu
- Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - An Xu
- School of Basic Medical Sciences, Anhui Medical University, No. 81, Meishan Road, Hefei 230032, China
- Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
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Junior SFS, Mannarino CF, de Farias Araújo G, Bila DM, Hauser-Davis RA, Saint'Pierre T, da Costa GL, Oliveira MME, Parente CET, Correia FV, Saggioro EM. A comprehensive assessment of leachate contamination at a non-operational open dumpsite: mycoflora screening, metal soil pollution indices, and ecotoxicological risks. ENVIRONMENTAL MONITORING AND ASSESSMENT 2022; 195:243. [PMID: 36576602 DOI: 10.1007/s10661-022-10885-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 12/21/2022] [Indexed: 06/17/2023]
Abstract
The final disposal of municipal solid waste (MSW) in dumpsites is still a reality worldwide, especially in low- and middle-income countries, leading to leachate-contaminated zones. Therefore, the aim of this study was to carry out soil and leachate physicochemical, microbiological, and toxicological characterizations from a non-operational dumpsite. The L-01 pond samples presented the highest physicochemical parameters, especially chloride (Cl; 4101 ± 44.8 mg L-1), electrical conductivity (EC; 10,452 ± 0.1 mS cm-1), and chemical oxygen demand (COD; 760 ± 6.6 mg L-1) indicating the presence of leachate, explained by its close proximity to the landfill cell. Pond L-03 presented higher parameters compared to pond L-02, except for N-ammoniacal and phosphorus levels, explained by the local geological configuration, configured as a slope from the landfill cell towards L-03. Seven filamentous and/or yeast fungi genera were identified, including the opportunistic pathogenic fungi Candida krusei (4 CFU) in an outcrop sample. Regarding soil samples, Br, Se, and I were present at high concentrations leading to high soil contamination (CF ≤ 6). Pond L-02 presented the highest CF for Br (18.14 ± 18.41 mg kg-1) and I (10.63 ± 3.66 mg kg-1), while pond L-03 presented the highest CF for Se (7.60 ± 1.33 mg kg-1). The most severe lethal effect for Artemia salina was observed for L-03 samples (LC50: 79.91%), while only samples from L-01 were toxic to Danio rerio (LC50: 32.99%). The highest lethality for Eisenia andrei was observed for L-02 samples (LC50: 50.30%). The applied risk characterization indicates high risk of all proposed scenarios for both aquatic (RQ 375-909) and terrestrial environments (RQ > 1.4 × 105). These findings indicate that the investigated dumpsite is contaminated by both leachate and metals, high risks to living organisms and adjacent water resources, also potentially affecting human health.
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Affiliation(s)
- Sidney Fernandes Sales Junior
- Post-Graduation Program in Public Health and Environment, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, 1480 Leopoldo Bulhões Ave, 21041-210, Rio de Janeiro, RJ, Brazil
- Environmental Health Evaluation and Promotion Laboratory, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, 4365 Brasil Ave, 21045-900, Rio de Janeiro, RJ, Brazil
| | - Camille Ferreira Mannarino
- Sanitation and Environment Health Department, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, 1480 Leopoldo Bulhões Ave, 21041-210, Rio de Janeiro, RJ, Brazil
| | - Gabriel de Farias Araújo
- Post-Graduation Program in Public Health and Environment, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, 1480 Leopoldo Bulhões Ave, 21041-210, Rio de Janeiro, RJ, Brazil
- Environmental Health Evaluation and Promotion Laboratory, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, 4365 Brasil Ave, 21045-900, Rio de Janeiro, RJ, Brazil
| | - Daniele Maia Bila
- Department of Sanitary and Environment Engineering, State University of Rio de Janeiro, 524 São Francisco Xavier Street, Room 5029-F, 20550-900, Rio de Janeiro, Brazil
| | - Rachel Ann Hauser-Davis
- Environmental Health Evaluation and Promotion Laboratory, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, 4365 Brasil Ave, 21045-900, Rio de Janeiro, RJ, Brazil
| | - Tatiana Saint'Pierre
- Department of Chemistry, Pontifical Catholic University of Rio de Janeiro, Marquês de São Vicente Street, 225, 22541-041, Gávea, Rio de Janeiro, RJ, Brazil
| | - Gisela Lara da Costa
- Laboratory of Taxonomy, Biochemistry and Bioprospecting of Fungi, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, 4365 Brasil Ave, 21045-900, Rio de Janeiro, RJ, Brazil
| | - Manoel Marques Evangelista Oliveira
- Laboratory of Taxonomy, Biochemistry and Bioprospecting of Fungi, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, 4365 Brasil Ave, 21045-900, Rio de Janeiro, RJ, Brazil
| | - Cláudio Ernesto Taveira Parente
- Laboratório de Radioisótopos, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho s/n, Bloco G0, Sala 60, Subsolo, Rio de Janeiro, 21941-902, Brazil
| | - Fábio Veríssimo Correia
- Department of Natural Sciences, Federal University of the State of Rio de Janeiro, 458 Pasteur Ave, 22290-20, Urca, Rio de Janeiro, Brazil
| | - Enrico Mendes Saggioro
- Post-Graduation Program in Public Health and Environment, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, 1480 Leopoldo Bulhões Ave, 21041-210, Rio de Janeiro, RJ, Brazil.
- Environmental Health Evaluation and Promotion Laboratory, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, 4365 Brasil Ave, 21045-900, Rio de Janeiro, RJ, Brazil.
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Wu J, Yang D, Song Z, Qian Q, Dai J, Dong J. Target RNA expression omics approach to reveal the liver detoxification effect induced by Chinese medicine prescription Niu Huang Jie Du against realgar overexposure to mice. JOURNAL OF ETHNOPHARMACOLOGY 2022; 298:115610. [PMID: 35973632 DOI: 10.1016/j.jep.2022.115610] [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: 06/15/2022] [Revised: 07/20/2022] [Accepted: 08/03/2022] [Indexed: 06/15/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Niu Huang Jie Du prescription (NHJD) is a traditional Chinese medicine (TCM) widely used in patients suffering from excessive inner fire toxin (Huo Du Nei Sheng) syndrome, such as sore throat, gingival swelling, and pain, mouth and tongue sores, etc. This formula contains realgar (As4S4) which is one of the 28 toxic medicinal materials promulgated by the Chinese Ministry of Health. Many studies reported its toxicity on the liver and kidney, and the detoxification effect of NHJD. However, its detoxification mechanism is still unclear. AIM OF THE STUDY To clarify the detoxification mechanism of NHJD to realgar, this study evaluated the detoxification effect of NHJD on realgar exposure in mice, and analyzed differences in mRNA expression profiles in liver tissues and associated functional predictions. MATERIAL AND METHODS ICR mice were administered with NHJD, realgar, and CMC-Na as blank control for 12 weeks, respectively. Liver injury was evaluated by histopathologic examination and liver mRNA gene were sequenced by Illumina. Differentially expressed gene, functionally enrichment and protein association network analysis were conducted. RESULTS 43 genes were screened out, among which 15 genes in the realgar group were decreased, but the extent of the decline has been restored in the NHJD group. The remaining 28 genes have exactly the opposite trends. Functional module analysis revealed that those detoxification function-related genes were primarily for positive regulation of glutathione metabolism, P450 on the metabolism of exogenous compounds, oxidative stress and immune-related, etc. CONCLUSIONS: The results indicated that realgar mainly causes liver damage by changing the common enzymes of drug metabolism, especially the expression of genes related to CYPs, GSTs family, oxidative stress, and complement immunity, while the TCM prescription NHJD has a regulatory effect on the abnormal expression of corresponding genes. Our results will provide some clues for the detoxification mechanism of arsenic-containing TCM prescriptions.
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Affiliation(s)
- Juan Wu
- Department of Public Health, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Dongqing Yang
- Department of Public Health, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Ziwei Song
- The Third School of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | | | - Jianguo Dai
- Department of Pathology and Pathophysiology, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Ju Dong
- Department of Public Health, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China.
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Model systems and organisms for addressing inter- and intra-species variability in risk assessment. Regul Toxicol Pharmacol 2022; 132:105197. [DOI: 10.1016/j.yrtph.2022.105197] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 05/20/2022] [Accepted: 05/25/2022] [Indexed: 12/12/2022]
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10
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Rusyn I, Arzuaga X, Cattley RC, Christopher Corton J, Ferguson SS, Godoy P, Guyton KZ, Kaplowitz N, Khetani SR, Roberts R, Roth RA, Smith MT. Key Characteristics of Human Hepatotoxicants as a Basis for Identification and Characterization of the Causes of Liver Toxicity. Hepatology 2021; 74:3486-3496. [PMID: 34105804 PMCID: PMC8901129 DOI: 10.1002/hep.31999] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 05/05/2021] [Accepted: 06/07/2021] [Indexed: 12/13/2022]
Abstract
Hazard identification regarding adverse effects on the liver is a critical step in safety evaluations of drugs and other chemicals. Current testing paradigms for hepatotoxicity rely heavily on preclinical studies in animals and human data (epidemiology and clinical trials). Mechanistic understanding of the molecular and cellular pathways that may cause or exacerbate hepatotoxicity is well advanced and holds promise for identification of hepatotoxicants. One of the challenges in translating mechanistic evidence into robust decisions about potential hepatotoxicity is the lack of a systematic approach to integrate these data to help identify liver toxicity hazards. Recently, marked improvements were achieved in the practice of hazard identification of carcinogens, female and male reproductive toxicants, and endocrine disrupting chemicals using the key characteristics approach. Here, we describe the methods by which key characteristics of human hepatotoxicants were identified and provide examples for how they could be used to systematically identify, organize, and use mechanistic data when identifying hepatotoxicants.
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Affiliation(s)
- Ivan Rusyn
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX, USA
| | - Xabier Arzuaga
- Center for Public Health and Environmental Assessment, Environmental Protection Agency, Washington, DC, USA
| | | | - J. Christopher Corton
- Center for Computational Toxicology and Exposure, Environmental Protection Agency, Durham, NC, USA
| | - Stephen S. Ferguson
- National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, Durham, NC, USA
| | - Patricio Godoy
- Roche Pharma Research and Early Development, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd., Basel, Switzerland
| | - Kathryn Z. Guyton
- Monographs Programme, International Agency for Research on Cancer, Lyon, France
| | - Neil Kaplowitz
- Research Center for Liver Disease, University of Southern California, Los Angeles, CA, USA
| | - Salman R. Khetani
- Department of Bioengineering, University of Illinois at Chicago, Chicago, IL, USA
| | - Ruth Roberts
- ApconiX, Alderley Edge, United Kingdom
- School of Biosciences, University of Birmingham, Birmingham, United Kingdom
| | - Robert A. Roth
- Department of Pharmacology and Toxicology, Michigan State University, East Lancing, MI, USA
| | - Martyn T. Smith
- Division of Environmental Health Sciences, University of California Berkeley, Berkeley, CA, USA
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Marques CAV, Figueiredo END, Gutiérrez MGRD. Breast cancer screening program for risk groups: facts and perspectives. Rev Bras Enferm 2021; 75:e20210050. [PMID: 34669830 DOI: 10.1590/0034-7167-2021-0050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Accepted: 06/22/2021] [Indexed: 12/09/2022] Open
Abstract
OBJECTIVES to measure the frequency and compliance of breast cancer screening, according to the risk for this disease. METHODS a cross-sectional study with 950 female users of 38 public Primary Health Care services in São Paulo, between October and December 2013. According to UHS criteria, participants were grouped into high risk and standard risk, and frequency, association (p≤0.05), and screening compliance were measured. RESULTS 6.7% had high risk and 93.3% standard risk, respectively; in these groups, the frequency and compliance of clinical breast examination were 40.3% and 37.1%, and 43.5% and 43.0% (frequency p=0.631, compliance p=0.290). Mammograms were 67.7% and 35.5% for participants at high risk, and 57.4% and 25.4% for those at standard risk (frequency p=0.090, compliance p=0.000). CONCLUSIONS in the groups, attendance and conformity of the clinical breast exam were similar; for mammography, it was higher in those at high risk, with assertiveness lower than the 70% set in UHS.
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12
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Sales Junior SF, Costa Amaral IC, Mannarino CF, Hauser-Davis RA, Correia FV, Saggioro EM. Long-term landfill leachate exposure modulates antioxidant responses and causes cyto-genotoxic effects in Eisenia andrei earthworms. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 287:117351. [PMID: 34000669 DOI: 10.1016/j.envpol.2021.117351] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/06/2021] [Accepted: 05/09/2021] [Indexed: 06/12/2023]
Abstract
It is estimated that approximately 0.4% of the total leachate produced in a landfill is destined for treatment plants, while the rest can reach the soil and groundwater. In this context, this study aimed to perform leachate toxicity evaluations through immune system cytotoxic assessments, genotoxic (comet assay) appraisals and antioxidant system (superoxide dismutase - SOD; catalase - CAT, glutathione-S-transferase - GST; reduced glutathione - GSH and metallothionein - MT) evaluations in Eisenia andrei earthworms exposed to a Brazilian leachate for 77 days. The leachate sample contained high organic matter (COD - 10,630 mg L-1) and ammoniacal nitrogen (2398 mg L-1), as well as several metals, including Ca, Cr, Fe, Mg, Ni and Zn. Leachate exposure resulted in SOD activity alterations and increased CAT activity and MT levels. Decreased GST activity and GSH levels were also observed. Antioxidant system alterations due to leachate exposure led to increased malondialdehyde levels as a result of lipid peroxidation after the 77 day-exposure. An inflammatory process was also observed in exposed earthworms, evidenced by increased amoebocyte density, and DNA damage was also noted. This study demonstrates for the first time that sublethal effect assessments in leachate-exposed earthworms comprise an important tool for solid waste management.
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Affiliation(s)
- Sidney Fernandes Sales Junior
- Center of Studies on Worker's Health and Human Ecology, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Leopoldo Bulhões 1480, 21041-210, Rio de Janeiro, RJ, Brazil
| | - Isabele Campos Costa Amaral
- Center of Studies on Worker's Health and Human Ecology, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Leopoldo Bulhões 1480, 21041-210, Rio de Janeiro, RJ, Brazil
| | - Camille Ferreira Mannarino
- Sanitation and Environment Health Department, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Leopoldo Bulhões 1480, 21041-210, Rio de Janeiro, RJ, Brazil
| | - Rachel Ann Hauser-Davis
- Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, 21040-360, Rio de Janeiro, Brazil
| | - Fábio Veríssimo Correia
- UNIRIO,Departamento de Ciências Naturais, Av. Pasteur, 458, Urca, 22290-20, Rio de Janeiro, Brazil
| | - Enrico Mendes Saggioro
- Center of Studies on Worker's Health and Human Ecology, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Leopoldo Bulhões 1480, 21041-210, Rio de Janeiro, RJ, Brazil; Sanitation and Environment Health Department, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Leopoldo Bulhões 1480, 21041-210, Rio de Janeiro, RJ, Brazil.
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13
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Valdiviezo A, Luo YS, Chen Z, Chiu WA, Rusyn I. Quantitative in Vitro-to-in Vivo Extrapolation for Mixtures: A Case Study of Superfund Priority List Pesticides. Toxicol Sci 2021; 183:60-69. [PMID: 34142158 DOI: 10.1093/toxsci/kfab076] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
In vitro cell-based toxicity testing methods generate large amounts of data informative for risk-based evaluations. To allow extrapolation of the quantitative outputs from cell-based tests to the equivalent exposure levels in humans, reverse toxicokinetic (RTK) modeling is used to conduct in vitro-to-in vivo extrapolation (IVIVE) from in vitro effective concentrations to in vivo oral dose equivalents. IVIVE modeling approaches for individual chemicals are well-established; however, the potential implications of chemical-to-chemical interactions in mixture settings on IVIVE remains largely unexplored. We hypothesized that chemical co-exposures could modulate both protein binding efficiency and hepatocyte clearance of the chemicals in a mixture, which would in turn affect the quantitative IVIVE toxicokinetic parameters. To test this hypothesis, we used 20 pesticides from the Agency for Toxic Substances and Disease Registry (ATSDR) Substance Priority List, both individually and as equimolar mixtures, and investigated the concentration-dependent effects of chemical interactions on in vitro toxicokinetic parameters. Plasma protein binding efficiency was determined by using ultracentrifugation, and hepatocyte clearance was estimated in suspensions of cryopreserved primary human hepatocytes. We found that for single chemicals, the protein binding efficiencies were similar at different test concentrations. In a mixture, however, both protein binding efficiency and hepatocyte clearance were affected. When IVIVE was conducted using mixture-derived toxicokinetic data, more conservative estimates of Activity-to-Exposure Ratios (AERs) were produced as compared to using data from single chemical experiments. Because humans are exposed to mixtures of chemicals, this study is significant as it demonstrates the importance of incorporating mixture-derived parameters into IVIVE for in vitro bioactivity data in order to accurately prioritize risks and facilitate science-based decision-making.
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Affiliation(s)
- Alan Valdiviezo
- Interdisciplinary Faculty of Toxicology and Department of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, 77843
| | - Yu-Syuan Luo
- Interdisciplinary Faculty of Toxicology and Department of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, 77843
| | - Zunwei Chen
- Interdisciplinary Faculty of Toxicology and Department of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, 77843
| | - Weihsueh A Chiu
- Interdisciplinary Faculty of Toxicology and Department of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, 77843
| | - Ivan Rusyn
- Interdisciplinary Faculty of Toxicology and Department of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, 77843
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14
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Sales Junior SF, Mannarino CF, Bila DM, Taveira Parente CE, Correia FV, Saggioro EM. Lethal and long-term effects of landfill leachate on Eisenia andrei earthworms: Behavior, reproduction and risk assessment. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 285:112029. [PMID: 33578208 DOI: 10.1016/j.jenvman.2021.112029] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 12/03/2020] [Accepted: 01/18/2021] [Indexed: 06/12/2023]
Abstract
Leachate is difficult to biodegrade, and presents variable physical, chemical and biological characteristics, as well as high toxicological potential for soil, groundwater and water bodies. In this context, untreated leachate toxicity was evaluated through acute and chronic exposures in Eisenia andrei earthworms. Physico-chemical leachate characterizations indicate a complex composition, with high organic matter (COD - 10,634 mg L-1) and ammoniacal nitrogen (2388 mg L-1) concentrations. Metals with carcinogenic potential, such as Cr, As and Pb, were present at 0.60, 0.14 and 0.01 μg L-1, respectively and endocrine disrupting compounds were detected in estradiol equivalents of 660 ± 50 ng L-1. Acute tests with Eisenia andrei indicated an LC50 (72 h) of 1.3 ± 0.1 μL cm-2 in a filter paper contact test and 53.9 ± 1.3 mL kg-1 in natural soil (14 days). The EC50 in a behavioral test was estimated as 31.6 ± 6.8 mL kg-1, indicating an escape effect for concentrations ranging from 35.0 to 70.0 mL kg-1 and habitat loss from 87.5 mL kg-1 of leachate exposure. Chronic exposure (56 days) led to reproduction effects, resulting in a 4-fold decreased cocoon production and 7-fold juvenile decrease. This effect was mainly attributed to the possible presence of endocrine disrupting compounds. An estimated NOAEL of 1.7 mL L-1 and LOAEL of 3.5 mL L-1 were estimated for earthworms exposed to the assessed effluent. Extremely high-risk quotients (RQ ≥ 1) were estimated based on leachate application in irrigation. Thus, adequate municipal solid waste management is paramount, especially with regard to generated by-products, which can result in high toxicological risks for terrestrial organisms.
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Affiliation(s)
- Sidney Fernandes Sales Junior
- Center of Studies on Worker's Health and Human Ecology, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Leopoldo Bulhões 1480, 21041-210, Rio de Janeiro, RJ, Brazil
| | - Camille Ferreira Mannarino
- Sanitation and Environment Health Department, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Leopoldo Bulhões 1480, 21041-210, Rio de Janeiro, RJ, Brazil
| | - Daniele Maia Bila
- Department of Sanitary and Environment Engineering, State University of Rio de Janeiro, 524 São Francisco Xavier Street, Room 5029-F, 20550-900, Rio de Janeiro, Brazil
| | - Cláudio Ernesto Taveira Parente
- Laboratório de Radioisótopos, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho s/n, Bloco G0, 21941-902, Rio de Janeiro, Brazil
| | - Fábio Veríssimo Correia
- UNIRIO, Departamento de Ciências Naturais, Av. Pasteur, 458, Urca, 22290-20, Rio de Janeiro, Brazil.
| | - Enrico Mendes Saggioro
- Center of Studies on Worker's Health and Human Ecology, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Leopoldo Bulhões 1480, 21041-210, Rio de Janeiro, RJ, Brazil; Sanitation and Environment Health Department, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Leopoldo Bulhões 1480, 21041-210, Rio de Janeiro, RJ, Brazil.
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15
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Fishbein A, Hammock BD, Serhan CN, Panigrahy D. Carcinogenesis: Failure of resolution of inflammation? Pharmacol Ther 2021; 218:107670. [PMID: 32891711 PMCID: PMC7470770 DOI: 10.1016/j.pharmthera.2020.107670] [Citation(s) in RCA: 95] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/19/2020] [Indexed: 02/06/2023]
Abstract
Inflammation in the tumor microenvironment is a hallmark of cancer and is recognized as a key characteristic of carcinogens. However, the failure of resolution of inflammation in cancer is only recently being understood. Products of arachidonic acid and related fatty acid metabolism called eicosanoids, including prostaglandins, leukotrienes, lipoxins, and epoxyeicosanoids, critically regulate inflammation, as well as its resolution. The resolution of inflammation is now appreciated to be an active biochemical process regulated by endogenous specialized pro-resolving lipid autacoid mediators which combat infections and stimulate tissue repair/regeneration. Environmental and chemical human carcinogens, including aflatoxins, asbestos, nitrosamines, alcohol, and tobacco, induce tumor-promoting inflammation and can disrupt the resolution of inflammation contributing to a devastating global cancer burden. While mechanisms of carcinogenesis have focused on genotoxic activity to induce mutations, nongenotoxic mechanisms such as inflammation and oxidative stress promote genotoxicity, proliferation, and mutations. Moreover, carcinogens initiate oxidative stress to synergize with inflammation and DNA damage to fuel a vicious feedback loop of cell death, tissue damage, and carcinogenesis. In contrast, stimulation of resolution of inflammation may prevent carcinogenesis by clearance of cellular debris via macrophage phagocytosis and inhibition of an eicosanoid/cytokine storm of pro-inflammatory mediators. Controlling the host inflammatory response and its resolution in carcinogen-induced cancers will be critical to reducing carcinogen-induced morbidity and mortality. Here we review the recent evidence that stimulation of resolution of inflammation, including pro-resolution lipid mediators and soluble epoxide hydrolase inhibitors, may be a new chemopreventive approach to prevent carcinogen-induced cancer that should be evaluated in humans.
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Affiliation(s)
- Anna Fishbein
- Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA; Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA.
| | - Bruce D. Hammock
- Department of Entomology and Nematology, and UCD Comprehensive Cancer Center, University of California, Davis, CA 95616, USA
| | - Charles N. Serhan
- Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Dipak Panigrahy
- Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA,Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
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16
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Liu D, Xu G, Bai C, Gu Y, Wang D, Li B. Differential effects of arsenic species on Nrf2 and Bach1 nuclear localization in cultured hepatocytes. Toxicol Appl Pharmacol 2021; 413:115404. [PMID: 33434570 DOI: 10.1016/j.taap.2021.115404] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 01/03/2021] [Accepted: 01/06/2021] [Indexed: 12/28/2022]
Abstract
Arsenic is a ubiquitous metalloid element present in both inorganic and organic forms in the environment. The liver is considered to be a primary organ of arsenic biotransformation and methylation, as well as the main target of arsenic toxicity. Studies have confirmed that Chang human hepatocytes have an efficient arsenic methylating capacity. Our previous studies have proven that arsenite activates nuclear factor erythroid 2-related factor 2 (Nrf2) pathway in hepatocytes. This study aimed to explore the activation of the Nrf2 pathway upon treatment of arsenic in various forms, including inorganic and organic arsenic. Our results showed that inorganic arsenic-both As2O3 and Na2HAsO4 significantly induced the expression of Nrf2 protein and mRNA, enhanced the transcription activity of Nrf2, and induced the expression of downstream target genes. These results confirmed the inorganic arsenic-induced Nrf2 pathway activation in hepatocytes. Although all arsenic chemicals used in the study induced Nrf2 protein accumulation, the organic arsenic C2H7AsO2 did not affect the expression of Nrf2 downstream genes which were elevated by inorganic arsenic exposures. Through qRT-PCR and Nrf2 luciferase reporter assays, we further confirmed that C2H7AsO2 neither increased Nrf2 mRNA level nor activated the Nrf2 transcription activity. Mechanistically, our results confirmed inorganic arsenic-induced both the nuclear import of Nrf2 and export of Bach1 (BTB and CNC homology 1), which is an Nrf2 transcriptional repressor, while organic arsenic only induced Nrf2 translocation. The unique pattern of Nrf2 regulation by organic arsenic underlines the critical role of Nrf2 and Bach1 in the arsenic toxicology.
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Affiliation(s)
- Dan Liu
- Environment and Non-Communicable Disease Research Center, Key Laboratory of Arsenic-related Biological Effects and Prevention and Treatment in Liaoning Province, School of Public Health, China Medical University, Shenyang, PR China; Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, PR China
| | - Guowei Xu
- Environment and Non-Communicable Disease Research Center, Key Laboratory of Arsenic-related Biological Effects and Prevention and Treatment in Liaoning Province, School of Public Health, China Medical University, Shenyang, PR China
| | - Caijun Bai
- Environment and Non-Communicable Disease Research Center, Key Laboratory of Arsenic-related Biological Effects and Prevention and Treatment in Liaoning Province, School of Public Health, China Medical University, Shenyang, PR China
| | - Yuqin Gu
- Environment and Non-Communicable Disease Research Center, Key Laboratory of Arsenic-related Biological Effects and Prevention and Treatment in Liaoning Province, School of Public Health, China Medical University, Shenyang, PR China
| | - Da Wang
- Environment and Non-Communicable Disease Research Center, Key Laboratory of Arsenic-related Biological Effects and Prevention and Treatment in Liaoning Province, School of Public Health, China Medical University, Shenyang, PR China
| | - Bing Li
- Environment and Non-Communicable Disease Research Center, Key Laboratory of Arsenic-related Biological Effects and Prevention and Treatment in Liaoning Province, School of Public Health, China Medical University, Shenyang, PR China.
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17
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Analysis of reproducibility and robustness of a human microfluidic four-cell liver acinus microphysiology system (LAMPS). Toxicology 2020; 448:152651. [PMID: 33307106 DOI: 10.1016/j.tox.2020.152651] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 10/06/2020] [Accepted: 11/27/2020] [Indexed: 02/07/2023]
Abstract
A human microfluidic four-cell liver acinus microphysiology system (LAMPS), was evaluated for reproducibility and robustness as a model for drug pharmacokinetics and toxicology. The model was constructed using primary human hepatocytes or human induced pluripotent stem cell (iPSC)-derived hepatocytes and 3 human cell lines for the endothelial, Kupffer and stellate cells. The model was tested in two laboratories and demonstrated to be reproducible in terms of basal function of hepatocytes, Terfenadine metabolism, and effects of Tolcapone (88 μM), Troglitazone (150 μM), and caffeine (600 μM) over 9 days in culture. Additional experiments compared basal outputs of albumin, urea, lactate dehydrogenase (LDH) and tumor necrosis factor (TNF)α, as well as drug metabolism and toxicity in the LAMPS model, and in 2D cultures seeded with either primary hepatocytes or iPSC-hepatocytes. Further experiments to study the effects of Terfenadine (10 μM), Tolcapone (88 μM), Trovafloxacin (150 μM with or without 1 μg/mL lipopolysaccharide), Troglitazone (28 μM), Rosiglitazone (0.8 μM), Pioglitazone (3 μM), and caffeine (600 μM) were carried out over 10 days. We found that both primary human hepatocytes and iPSC-derived hepatocytes in 3D culture maintained excellent basal liver function and Terfenadine metabolism over 10 days compared the same cells in 2D cultures. In 2D, non-overlay monolayer cultures, both cell types lost hepatocyte phenotypes after 48 h. With respect to drug effects, both cell types demonstrated comparable and more human-relevant effects in LAMPS, as compared to 2D cultures. Overall, these studies show that LAMPS is a robust and reproducible in vitro liver model, comparable in performance when seeded with either primary human hepatocytes or iPSC-derived hepatocytes, and more physiologically and clinically relevant than 2D monolayer cultures.
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18
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Augustin Y, Staines HM, Krishna S. Artemisinins as a novel anti-cancer therapy: Targeting a global cancer pandemic through drug repurposing. Pharmacol Ther 2020; 216:107706. [PMID: 33075360 PMCID: PMC7564301 DOI: 10.1016/j.pharmthera.2020.107706] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 10/09/2020] [Accepted: 10/13/2020] [Indexed: 02/07/2023]
Abstract
Artemisinins are a unique class of antimalarial drugs with significant potential for drug repurposing for a wide range of diseases including cancer. Cancer is a leading cause of death globally and the majority of cancer related deaths occur in Low and Middle Income Countries (LMICs) where conventional treatment options are often limited by financial cost. Drug repurposing can significantly shorten new therapeutic discovery pathways, ensuring greater accessibility and affordability globally. Artemisinins have an excellent safety and tolerability profile as well as being affordable for deployment in Low and Middle Class Income Countries at around USD1 per daily dose. Robust, well designed clinical trials of artemisinin drug repurposing are indicated for a variety of different cancers and treatment settings.
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Affiliation(s)
- Yolanda Augustin
- Institute of Infection & Immunity, St George's University of London, United Kingdom
| | - Henry M Staines
- Institute of Infection & Immunity, St George's University of London, United Kingdom
| | - Sanjeev Krishna
- Institute of Infection & Immunity, St George's University of London, United Kingdom.
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19
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Rusyn I, Chiu WA, Wright FA. Questioning Existing Cancer Hazard Evaluation Standards in the Name of Statistics. Toxicol Sci 2020; 177:521-522. [PMID: 32462183 PMCID: PMC7778332 DOI: 10.1093/toxsci/kfaa077] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Ivan Rusyn
- Department of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas 77843
| | - Weihsueh A Chiu
- Department of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas 77843
| | - Fred A Wright
- Bioinformatics Research Center
- Departments of Statistics and Biological Sciences, North Carolina State University, Raleigh, North Carolina 27695
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20
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Ismail A, Akhtar S, Riaz M, Gong YY, Routledge MN, Naeem I. Prevalence and Exposure Assessment of Aflatoxins Through Black Tea Consumption in the Multan City of Pakistan and the Impact of Tea Making Process on Aflatoxins. Front Microbiol 2020; 11:446. [PMID: 32296399 PMCID: PMC7136417 DOI: 10.3389/fmicb.2020.00446] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Accepted: 03/02/2020] [Indexed: 11/13/2022] Open
Abstract
Aflatoxins are the highly toxic secondary metabolites of certain fungi, being mainly produced by Aspergillus flavus and Aspergillus parasiticus. Aflatoxins are classified as group 1 category carcinogens by the International Agency for Research on Cancer (IARC). A large number of food commodities are reported to be contaminated with aflatoxins. Tea is the world's second most consumed beverage and the consumption of tea is increasing day by day. Besides being a source of several health promoting substances, tea leaves are also reported to be contaminated with aflatoxins. However, not a single study is reported from Pakistan regarding the level of aflatoxins in commercially available black tea samples. The current study aimed to quantify the level of aflatoxins in commercially available branded and non-branded black tea samples. The estimated daily intake (EDI) of aflatoxins through branded and non-branded black tea consumption and the health risk assessment based on margin of exposure (MOE) approach was assessed. Furthermore, the impact of local tea making processes on the concentration of aflatoxins in tea beverage (filtrate) was also investigated.
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Affiliation(s)
- Amir Ismail
- Institute of Food Science and Nutrition, Bahauddin Zakariya University, Multan, Pakistan
| | - Saeed Akhtar
- Institute of Food Science and Nutrition, Bahauddin Zakariya University, Multan, Pakistan
| | - Muhammad Riaz
- Institute of Food Science and Nutrition, Bahauddin Zakariya University, Multan, Pakistan
| | - Yun Yun Gong
- School of Food Science and Nutrition, University of Leeds, Leeds, United Kingdom
| | - Michael N. Routledge
- School of Medicine, Faculty of Medicine and Health, University of Leeds, Leeds, United Kingdom
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Iqra Naeem
- Institute of Food Science and Nutrition, Bahauddin Zakariya University, Multan, Pakistan
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21
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Jinadasa BKKK, Monteau F, Morais S. Critical review of micro-extraction techniques used in the determination of polycyclic aromatic hydrocarbons in biological, environmental and food samples. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2020; 37:1004-1026. [PMID: 32186468 DOI: 10.1080/19440049.2020.1733103] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Polycyclic Aromatic Hydrocarbons (PAHs) are ubiquitous environmental contaminants and their accurate determination is very important to human health and environment safety. In this review, sorptive-based micro-extraction techniques [such as Solid-Phase Micro-extraction (SPME), Stir Bar Sorptive Extraction (SBSE), Micro-extraction in Packed Sorbent (MEPS)] and solvent-based micro-extraction [Membrane-Mediated Liquid-Phase Micro-extraction (MM-LPME), Dispersive Liquid-Liquid Micro-extraction (DLLME), and Single Drop Micro-extraction (SDME)] developed for quantification of PAHs in environmental, biological and food samples are reviewed. Moreover, recent micro-extraction techniques that have been coupled with other sample extraction strategies are also briefly discussed. The main objectives of these micro-extraction techniques are to perform extraction, pre-concentration and clean up together as one step, and the reduction of the analysis time, cost and solvent following the green chemistry guidelines.
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Affiliation(s)
- B K K K Jinadasa
- Laboratoire D'étude Des Résidus Et Contaminants Dans Les Aliments (LABERCA), Nantes-Atlantic National College of Veterinary Medicine, Food Science, and Engineering (ONIRIS) , Nantes, France
| | - Fabrice Monteau
- Laboratoire D'étude Des Résidus Et Contaminants Dans Les Aliments (LABERCA), Nantes-Atlantic National College of Veterinary Medicine, Food Science, and Engineering (ONIRIS) , Nantes, France
| | - Simone Morais
- REQUIMTE-LAQV, Instituto Superior De Engenharia Do Porto, Instituto Politécnico Do Porto , Porto, Portugal
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22
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Portier CJ. A comprehensive analysis of the animal carcinogenicity data for glyphosate from chronic exposure rodent carcinogenicity studies. Environ Health 2020; 19:18. [PMID: 32050978 PMCID: PMC7014589 DOI: 10.1186/s12940-020-00574-1] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 02/06/2020] [Indexed: 05/15/2023]
Abstract
Since the introduction of glyphosate-tolerant genetically-modified plants, the global use of glyphosate has increased dramatically making it the most widely used pesticide on the planet. There is considerable controversy concerning the carcinogenicity of glyphosate with scientists and regulatory authorities involved in the review of glyphosate having markedly different opinions. One key aspect of these opinions is the degree to which glyphosate causes cancer in laboratory animals after lifetime exposure. In this review, twenty-one chronic exposure animal carcinogenicity studies of glyphosate are identified from regulatory documents and reviews; 13 studies are of sufficient quality and detail to be reanalyzed in this review using trend tests, historical control tests and pooled analyses. The analyses identify 37 significant tumor findings in these studies and demonstrate consistency across studies in the same sex/species/strain for many of these tumors. Considering analyses of the individual studies, the consistency of the data across studies, the pooled analyses, the historical control data, non-neoplastic lesions, mechanistic evidence and the associated scientific literature, the tumor increases seen in this review are categorized as to the strength of the evidence that glyphosate causes these cancers. The strongest evidence shows that glyphosate causes hemangiosarcomas, kidney tumors and malignant lymphomas in male CD-1 mice, hemangiomas and malignant lymphomas in female CD-1 mice, hemangiomas in female Swiss albino mice, kidney adenomas, liver adenomas, skin keratoacanthomas and skin basal cell tumors in male Sprague-Dawley rats, adrenal cortical carcinomas in female Sprague-Dawley rats and hepatocellular adenomas and skin keratocanthomas in male Wistar rats.
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Affiliation(s)
- Christopher J Portier
- Rollins School of Public Health, Emory University, Atlanta, GA, USA.
- Department of Toxicogenomics, Maastricht University, Maastricht, Netherlands.
- CJP Consulting, Seattle, Washington, USA.
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