1
|
Acharya B, Dey S, Sahu PK, Behera A, Chowdhury B, Behera S. Perspectives on chick embryo models in developmental and reproductive toxicity screening. Reprod Toxicol 2024; 126:108583. [PMID: 38561097 DOI: 10.1016/j.reprotox.2024.108583] [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: 11/15/2023] [Revised: 03/18/2024] [Accepted: 03/27/2024] [Indexed: 04/04/2024]
Abstract
Teratology, the study of congenital anomalies and their causative factors intersects with developmental and reproductive toxicology, employing innovative methodologies. Evaluating the potential impacts of teratogens on fetal development and assessing human risk is an essential prerequisite in preclinical research. The chicken embryo model has emerged as a powerful tool for understanding human embryonic development due to its remarkable resemblance to humans. This model offers a unique platform for investigating the effects of substances on developing embryos, employing techniques such as ex ovo and in ovo assays, chorioallantoic membrane assays, and embryonic culture techniques. The advantages of chicken embryonic models include their accessibility, cost-effectiveness, and biological relevance to vertebrate development, enabling efficient screening of developmental toxicity. However, these models have limitations, such as the absence of a placenta and maternal metabolism, impacting the study of nutrient exchange and hormone regulation. Despite these limitations, understanding and mitigating the challenges posed by the absence of a placenta and maternal metabolism are critical for maximizing the utility of the chick embryo model in developmental toxicity testing. Indeed, the insights gained from utilizing these assays and their constraints can significantly contribute to our understanding of the developmental impacts of various agents. This review underscores the utilization of chicken embryonic models in developmental toxicity testing, highlighting their advantages and disadvantages by addressing the challenges posed by their physiological differences from mammalian systems.
Collapse
Affiliation(s)
- Biswajeet Acharya
- School of Pharmacy, Centurion University of Technology and Management, Odisha, India; State Forensic Laboratory, Bhubaneswar, Odisha, India
| | - Sandip Dey
- Birla Institute of Technology, Mesra, Ranchi, Jharkhand, India; State Forensic Laboratory, Bhubaneswar, Odisha, India
| | - Prafulla Kumar Sahu
- School of Pharmacy, Centurion University of Technology and Management, Odisha, India; State Forensic Laboratory, Bhubaneswar, Odisha, India.
| | - Amulyaratna Behera
- School of Pharmacy, Centurion University of Technology and Management, Odisha, India; State Forensic Laboratory, Bhubaneswar, Odisha, India.
| | - Bimalendu Chowdhury
- Roland Institute of Pharmaceutical Sciences, Khodasingi, Brahmapur, Odisha, India; State Forensic Laboratory, Bhubaneswar, Odisha, India
| | - Suchismeeta Behera
- Roland Institute of Pharmaceutical Sciences, Khodasingi, Brahmapur, Odisha, India; State Forensic Laboratory, Bhubaneswar, Odisha, India
| |
Collapse
|
2
|
Hughes S, Hessel EVS. Zebrafish and nematodes as whole organism models to measure developmental neurotoxicity. Crit Rev Toxicol 2024; 54:330-343. [PMID: 38832580 DOI: 10.1080/10408444.2024.2342448] [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: 11/30/2023] [Accepted: 04/05/2024] [Indexed: 06/05/2024]
Abstract
Despite the growing epidemiological evidence of an association between toxin exposure and developmental neurotoxicity (DNT), systematic testing of DNT is not mandatory in international regulations for admission of pharmaceuticals or industrial chemicals. However, to date around 200 compounds, ranging from pesticides, pharmaceuticals and industrial chemicals, have been tested for DNT in the current OECD test guidelines (TG-443 or TG-426). There are calls for the development of new approach methodologies (NAMs) for DNT, which has resulted in a DNT testing battery using in vitro human cell-based assays. These assays provide a means to elucidate the molecular mechanisms of toxicity in humans which is lacking in animal-based toxicity tests. However, cell-based assays do not represent all steps of the complex process leading to DNT. Validated models with a multi-organ network of pathways that interact at the molecular, cellular and tissue level at very specific timepoints in a life cycle are currently missing. Consequently, whole model organisms are being developed to screen for, and causally link, new molecular targets of DNT compounds and how they affect whole brain development and neurobehavioral endpoints. Given the practical and ethical restraints associated with vertebrate testing, lower animal models that qualify as 3 R (reduce, refine and replace) models, including the nematode (Caenorhabditis elegans) and the zebrafish (Danio rerio) will prove particularly valuable for unravelling toxicity pathways leading to DNT. Although not as complex as the human brain, these 3 R-models develop a complete functioning brain with numerous neurodevelopmental processes overlapping with human brain development. Importantly, the main signalling pathways relating to (neuro)development, metabolism and growth are highly conserved in these models. We propose the use of whole model organisms specifically zebrafish and C. elegans for DNT relevant endpoints.
Collapse
Affiliation(s)
- Samantha Hughes
- Department of Environmental Health and Toxicology, A-LIFE, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Ellen V S Hessel
- Centre for Health Protection, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
| |
Collapse
|
3
|
Collins EMS, Hessel EVS, Hughes S. How neurobehavior and brain development in alternative whole-organism models can contribute to prediction of developmental neurotoxicity. Neurotoxicology 2024; 102:48-57. [PMID: 38552718 PMCID: PMC11139590 DOI: 10.1016/j.neuro.2024.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 03/01/2024] [Accepted: 03/23/2024] [Indexed: 04/12/2024]
Abstract
Developmental neurotoxicity (DNT) is not routinely evaluated in chemical risk assessment because current test paradigms for DNT require the use of mammalian models which are ethically controversial, expensive, and resource demanding. Consequently, efforts have focused on revolutionizing DNT testing through affordable novel alternative methods for risk assessment. The goal is to develop a DNT in vitro test battery amenable to high-throughput screening (HTS). Currently, the DNT in vitro test battery consists primarily of human cell-based assays because of their immediate relevance to human health. However, such cell-based assays alone are unable to capture the complexity of a developing nervous system. Whole organismal systems that qualify as 3 R (Replace, Reduce and Refine) models are urgently needed to complement cell-based DNT testing. These models can provide the necessary organismal context and be used to explore the impact of chemicals on brain function by linking molecular and/or cellular changes to behavioural readouts. The nematode Caenorhabditis elegans, the planarian Dugesia japonica, and embryos of the zebrafish Danio rerio are all suited to low-cost HTS and each has unique strengths for DNT testing. Here, we review the strengths and the complementarity of these organisms in a novel, integrative context and highlight how they can augment current cell-based assays for more comprehensive and robust DNT screening of chemicals. Considering the limitations of all in vitro test systems, we discuss how a smart combinatory use of these systems will contribute to a better human relevant risk assessment of chemicals that considers the complexity of the developing brain.
Collapse
Affiliation(s)
- Eva-Maria S Collins
- Swarthmore College, Biology, 500 College Avenue, Swarthmore, PA 19081, USA; Department of Neuroscience, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA; Center of Excellence in Environmental Toxicology, University of Pennsylvania, Philadelphia, PA, USA.
| | - Ellen V S Hessel
- Centre for Health Protection, National Institute for Public Health and the Environment (RIVM), Antonie van Leeuwenhoeklaan 9, Bilthoven, 3721 MA, the Netherlands
| | - Samantha Hughes
- Department of Environmental Health and Toxicology, A-LIFE, Vrije Universiteit Amsterdam, de Boelelaan 1085, Amsterdam, 1081 HV, the Netherlands.
| |
Collapse
|
4
|
da Silva Prado L, Grivicich I, Miri JM, Charão MF, Bonfada A, Endres da Rocha G, Bondan da Silva J, Menezes Boaretto FB, Garcia ALH, da Silva J, Picada JN. Toxicological assessment of minoxidil: A drug with therapeutic potential besides alopecia. Food Chem Toxicol 2023; 182:114211. [PMID: 38007212 DOI: 10.1016/j.fct.2023.114211] [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: 10/13/2023] [Revised: 11/07/2023] [Accepted: 11/18/2023] [Indexed: 11/27/2023]
Abstract
Minoxidil is regularly prescribed for alopecia, and its therapeutic potential has expanded in recent times. However, few studies have been conducted to evaluate its toxicity, and controversial findings regarding its mutagenic activities remain unsolved. This study aimed to access cytotoxic, genotoxic, and mutagenic properties of minoxidil using the 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl tetrazolium bromide (MTT) assay, comet assay, and micronucleus test in mouse fibroblast (L929) cells and its point mutation induction potential in the Salmonella/microsome assay. Furthermore, an in vivo toxicity assessment was conducted in Caenorhabditis elegans. Minoxidil showed cytotoxicity at 2.0 mg/mL in MTT assay. Genotoxicity was observed after 3 h treatment in L929 cells using comet assay. No mutagenic effect was observed in both the micronucleus test and the Salmonella/microsome assay. The lethal dose 50 in C. elegans was determined to be 1.75 mg/mL, and a delay in body development was detected at all concentrations. In conclusion, minoxidil induces DNA damage only in early treatment, implying that this DNA damage may be repairable. This observation corroborates the absence of mutagenic activities observed in L929 cells and Salmonella typhimurium strains. However, the toxicity of minoxidil was evident in both C. elegans and L929 cells, underscoring the need for caution in its use.
Collapse
Affiliation(s)
- Lismare da Silva Prado
- Toxicological Genetics Laboratory, Graduate Program in Cellular and Molecular Biology Applied to Health, Luteran University of Brazil (ULBRA), Av. Farroupilha, 8001, 92425-900, Canoas, RS, Brazil
| | - Ivana Grivicich
- Cancer Biology Laboratory, Graduate Program in Cellular and Molecular Biology Applied to Health, Luteran University of Brazil (ULBRA), Av. Farroupilha 8001, 92425-900, Canoas, RS, Brazil
| | - Jessica Machado Miri
- Cancer Biology Laboratory, Graduate Program in Cellular and Molecular Biology Applied to Health, Luteran University of Brazil (ULBRA), Av. Farroupilha 8001, 92425-900, Canoas, RS, Brazil
| | - Mariele Feiffer Charão
- Graduate Program in Toxicology and Analytical Toxicology, Feevale University, ERS-239, 93525-075, Novo Hamburgo, Brazil
| | - Amanda Bonfada
- Graduate Program in Toxicology and Analytical Toxicology, Feevale University, ERS-239, 93525-075, Novo Hamburgo, Brazil
| | - Gabriela Endres da Rocha
- Graduate Program in Toxicology and Analytical Toxicology, Feevale University, ERS-239, 93525-075, Novo Hamburgo, Brazil
| | - Juliana Bondan da Silva
- Toxicological Genetics Laboratory, Graduate Program in Cellular and Molecular Biology Applied to Health, Luteran University of Brazil (ULBRA), Av. Farroupilha, 8001, 92425-900, Canoas, RS, Brazil
| | - Fernanda Brião Menezes Boaretto
- Toxicological Genetics Laboratory, Graduate Program in Cellular and Molecular Biology Applied to Health, Luteran University of Brazil (ULBRA), Av. Farroupilha, 8001, 92425-900, Canoas, RS, Brazil
| | - Ana Letícia Hilario Garcia
- Toxicological Genetics Laboratory, Graduate Program in Cellular and Molecular Biology Applied to Health, Luteran University of Brazil (ULBRA), Av. Farroupilha, 8001, 92425-900, Canoas, RS, Brazil; Toxicological Genetics Laboratory, LaSalle University, Av. Victor Barreto, 2288, 92010-000, Canoas, RS, Brazil
| | - Juliana da Silva
- Toxicological Genetics Laboratory, Graduate Program in Cellular and Molecular Biology Applied to Health, Luteran University of Brazil (ULBRA), Av. Farroupilha, 8001, 92425-900, Canoas, RS, Brazil; Toxicological Genetics Laboratory, LaSalle University, Av. Victor Barreto, 2288, 92010-000, Canoas, RS, Brazil
| | - Jaqueline Nascimento Picada
- Toxicological Genetics Laboratory, Graduate Program in Cellular and Molecular Biology Applied to Health, Luteran University of Brazil (ULBRA), Av. Farroupilha, 8001, 92425-900, Canoas, RS, Brazil.
| |
Collapse
|
5
|
Camacho JA, Welch B, Sprando RL, Hunt PR. Reproductive-Toxicity-Related Endpoints in C. elegans Are Consistent with Reduced Concern for Dimethylarsinic Acid Exposure Relative to Inorganic Arsenic. J Dev Biol 2023; 11:jdb11020018. [PMID: 37218812 DOI: 10.3390/jdb11020018] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 04/10/2023] [Accepted: 04/21/2023] [Indexed: 05/24/2023] Open
Abstract
Exposures to arsenic and mercury are known to pose significant threats to human health; however, the effects specific to organic vs. inorganic forms are not fully understood. Caenorhabditis elegans' (C. elegans) transparent cuticle, along with the conservation of key genetic pathways regulating developmental and reproductive toxicology (DART)-related processes such as germ stem cell renewal and differentiation, meiosis, and embryonic tissue differentiation and growth, support this model's potential to address the need for quicker and more dependable testing methods for DART hazard identification. Organic and inorganic forms of mercury and arsenic had different effects on reproductive-related endpoints in C. elegans, with methylmercury (meHgCl) having effects at lower concentrations than mercury chloride (HgCl2), and sodium arsenite (NaAsO2) having effects at lower concentrations than dimethylarsinic acid (DMA). Progeny to adult ratio changes and germline apoptosis were seen at concentrations that also affected gravid adult gross morphology. For both forms of arsenic tested, germline histone regulation was altered at concentrations below those that affected progeny/adult ratios, while concentrations for these two endpoints were similar for the mercury compounds. These C. elegans findings are consistent with corresponding mammalian data, where available, suggesting that small animal model test systems may help to fill critical data gaps by contributing to weight of evidence assessments.
Collapse
Affiliation(s)
- Jessica A Camacho
- Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, Food and Drug Administration, 8301 Muirkirk Road, Laurel, MD 20708, USA
| | - Bonnie Welch
- Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, Food and Drug Administration, 8301 Muirkirk Road, Laurel, MD 20708, USA
| | - Robert L Sprando
- Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, Food and Drug Administration, 8301 Muirkirk Road, Laurel, MD 20708, USA
| | - Piper R Hunt
- Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, Food and Drug Administration, 8301 Muirkirk Road, Laurel, MD 20708, USA
| |
Collapse
|
6
|
Tang Y, Zhang X, Lin Y, Sun J, Chen S, Wang W, Li J. Insights into the Oxidative Stress Alleviation Potential of Enzymatically Prepared Dendrobium officinale Polysaccharides. Molecules 2023; 28:molecules28073071. [PMID: 37049834 PMCID: PMC10095697 DOI: 10.3390/molecules28073071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 03/23/2023] [Accepted: 03/27/2023] [Indexed: 04/14/2023] Open
Abstract
(1) Background: The extraction parameters can dramatically alter the extraction rate and biological activity of polysaccharides. (2) Methods: Here, an enzyme-assisted extraction (EAE) was employed to extract D. officinale polysaccharides (DOPs), and its optimal extraction conditions were established by single-factor and Box-Behnken design (BBD) experiments. Further, on the basis of in vitro antioxidant capacity, the paraquat (PQ)-induced oxidative stress of Caenorhabditis elegans (C. elegans) was chosen as a research model to explore the antioxidant activity of DOPs. (3) Results: The results showed that the extraction yield of DOPs reached 48.66% ± 1.04% under the optimal condition. In vitro experiments had shown that DOPs have considerable ABTS+ radical scavenging capacity (EC50 = 7.27 mg/mL), hydroxyl radical scavenging capacity (EC50 = 1.61 mg/mL), and metal chelating power (EC50 = 8.31 mg/mL). Furthermore, in vivo experiments indicated that DOPs (0.25 mg/mL) significantly prolonged the lifespan, increased antioxidant enzyme activity, and upregulated the expression of daf-16 (>5.6-fold), skn-1 (>5.2-fold), and sir-2.1 (>2.3-fold) of C. elegans. (4) Conclusions: DOPs can be efficiently extracted by EAE and are effective in the reduction of oxidative stress levels in C. elegans.
Collapse
Affiliation(s)
- Yingqi Tang
- College of Life Sciences, China Jiliang University, Hangzhou 310018, China
| | - Xiong Zhang
- Hangzhou Zaoxianyibu Food Technology Co., Ltd., Hangzhou 310018, China
| | - Yudan Lin
- College of Life Sciences, China Jiliang University, Hangzhou 310018, China
| | - Jiehan Sun
- College of Life Sciences, China Jiliang University, Hangzhou 310018, China
| | - Shihao Chen
- Hangzhou Jiuxian Biotechnology Co., Ltd., Hangzhou 311618, China
| | - Weimin Wang
- College of Life Sciences, China Jiliang University, Hangzhou 310018, China
| | - Jia Li
- College of Life Sciences, China Jiliang University, Hangzhou 310018, China
- Key Laboratory of Specialty Agri-Product Quality and Hazard Controlling Technology of Zhejiang Province, Hangzhou 310018, China
| |
Collapse
|
7
|
Feng Z, McLamb F, Vu JP, Gong S, Gersberg RM, Bozinovic G. Physiological and transcriptomic effects of hexafluoropropylene oxide dimer acid in Caenorhabditis elegans during development. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 244:114047. [PMID: 36075119 DOI: 10.1016/j.ecoenv.2022.114047] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 08/26/2022] [Accepted: 08/29/2022] [Indexed: 06/15/2023]
Abstract
Per- and polyfluoroalkyl substances (PFAS) are chemicals resistant to degradation. While such a feature is desirable in consumer and industrial products, some PFAS, including perfluorooctanoic acid (PFOA), are toxic and bioaccumulate. Hexafluoropropylene oxide dimer acid (HFPO-DA), an emerging PFAS developed to replace PFOA, has not been extensively studied. To evaluate the potential toxicity of HFPO-DA with a cost- and time-efficient approach, we exposed C. elegans larvae for 48 h to 4 × 10-9-4 g/L HFPO-DA in liquid media and measured developmental, behavioral, locomotor, and transcriptional effects at various exposure levels. Worms exposed to 1.5-4 g/L HFPO-DA were developmentally delayed, and progeny production was significantly delayed (p < 0.05) in worms exposed to 2-4 g/L HFPO-DA. Statistically significant differential gene expression was identified in all fourteen HFPO-DA exposure groups ranging from 1.25 × 10-5 to 4 g/L, except for 6.25 × 10-5 g/L. Among 10298 analyzed genes, 2624 differentially expressed genes (DEGs) were identified in the developmentally delayed 4 g/L group only, and 78 genes were differentially expressed in at least one of the thirteen groups testing 1.25 × 10-5-2 g/L HFPO-DA exposures. Genes encoding for detoxification enzymes including cytochrome P450 and UDP glucuronosyltransferases were upregulated in 0.25-4 g/L acute exposure groups. DEGs were also identified in lower exposure level groups, though they did not share biological functions except for six ribosomal protein-coding genes. While our transcriptional data is inconclusive to infer mechanisms of toxicity, the significant gene expression differences at 1.25 × 10-5 g/L, the lowest concentration tested for transcriptional changes, calls for further targeted analyses of low-dose HFPO-DA exposure effects.
Collapse
Affiliation(s)
- Zuying Feng
- Boz Life Science Research and Teaching Institute, 3030 Bunker Hill Street, San Diego, CA, USA; School of Public Health, San Diego State University, 5500 Campanile Drive, San Diego, CA, USA.
| | - Flannery McLamb
- Boz Life Science Research and Teaching Institute, 3030 Bunker Hill Street, San Diego, CA, USA; Division of Extended Studies, University of California San Diego, 9600N. Torrey Pines Road, La Jolla, CA, USA.
| | - Jeanne P Vu
- Boz Life Science Research and Teaching Institute, 3030 Bunker Hill Street, San Diego, CA, USA; School of Public Health, San Diego State University, 5500 Campanile Drive, San Diego, CA, USA; Division of Extended Studies, University of California San Diego, 9600N. Torrey Pines Road, La Jolla, CA, USA.
| | - Sylvia Gong
- Boz Life Science Research and Teaching Institute, 3030 Bunker Hill Street, San Diego, CA, USA; School of Public Health, San Diego State University, 5500 Campanile Drive, San Diego, CA, USA; Division of Extended Studies, University of California San Diego, 9600N. Torrey Pines Road, La Jolla, CA, USA.
| | - Richard M Gersberg
- School of Public Health, San Diego State University, 5500 Campanile Drive, San Diego, CA, USA.
| | - Goran Bozinovic
- Boz Life Science Research and Teaching Institute, 3030 Bunker Hill Street, San Diego, CA, USA; School of Public Health, San Diego State University, 5500 Campanile Drive, San Diego, CA, USA; Division of Biological Sciences, University of California San Diego, 9500 Gilman Dr., La Jolla, CA, USA.
| |
Collapse
|
8
|
Zhu A, Zheng F, Zhang W, Li L, Li Y, Hu H, Wu Y, Bao W, Li G, Wang Q, Li H. Oxidation and Antioxidation of Natural Products in the Model Organism Caenorhabditiselegans. Antioxidants (Basel) 2022; 11:antiox11040705. [PMID: 35453390 PMCID: PMC9029379 DOI: 10.3390/antiox11040705] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 03/30/2022] [Accepted: 03/31/2022] [Indexed: 12/15/2022] Open
Abstract
Natural products are small molecules naturally produced by multiple sources such as plants, animals, fungi, bacteria and archaea. They exert both beneficial and detrimental effects by modulating biological targets and pathways involved in oxidative stress and antioxidant response. Natural products’ oxidative or antioxidative properties are usually investigated in preclinical experimental models, including virtual computing simulations, cell and tissue cultures, rodent and nonhuman primate animal models, and human studies. Due to the renewal of the concept of experimental animals, especially the popularization of alternative 3R methods for reduction, replacement and refinement, many assessment experiments have been carried out in new alternative models. The model organism Caenorhabditis elegans has been used for medical research since Sydney Brenner revealed its genetics in 1974 and has been introduced into pharmacology and toxicology in the past two decades. The data from C. elegans have been satisfactorily correlated with traditional experimental models. In this review, we summarize the advantages of C. elegans in assessing oxidative and antioxidative properties of natural products and introduce methods to construct an oxidative damage model in C. elegans. The biomarkers and signaling pathways involved in the oxidative stress of C. elegans are summarized, as well as the oxidation and antioxidation in target organs of the muscle, nervous, digestive and reproductive systems. This review provides an overview of the oxidative and antioxidative properties of natural products based on the model organism C. elegans.
Collapse
Affiliation(s)
- An Zhu
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350108, China; (Y.W.); (W.B.)
- Correspondence: (A.Z.); (G.L.); (Q.W.); (H.L.)
| | - Fuli Zheng
- Department of Preventive Medicine, School of Public Health, Fujian Medical University, Fuzhou 350108, China; (F.Z.); (H.H.)
| | - Wenjing Zhang
- Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning, Beijing Center for Disease Prevention and Control, Beijing 100013, China;
| | - Ludi Li
- Department of Toxicology, School of Public Health, Peking University, Beijing 100191, China; (L.L.); (Y.L.)
| | - Yingzi Li
- Department of Toxicology, School of Public Health, Peking University, Beijing 100191, China; (L.L.); (Y.L.)
| | - Hong Hu
- Department of Preventive Medicine, School of Public Health, Fujian Medical University, Fuzhou 350108, China; (F.Z.); (H.H.)
| | - Yajiao Wu
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350108, China; (Y.W.); (W.B.)
- Department of Pathogen Biology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350108, China
| | - Wenqiang Bao
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350108, China; (Y.W.); (W.B.)
- Department of Pathogen Biology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350108, China
| | - Guojun Li
- Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning, Beijing Center for Disease Prevention and Control, Beijing 100013, China;
- School of Public Health, Capital Medical University, Beijing 100069, China
- Correspondence: (A.Z.); (G.L.); (Q.W.); (H.L.)
| | - Qi Wang
- Department of Toxicology, School of Public Health, Peking University, Beijing 100191, China; (L.L.); (Y.L.)
- Key Laboratory of State Administration of Traditional Chinese Medicine for Compatibility Toxicology, Peking University, Beijing 100191, China
- Beijing Key Laboratory of Toxicological Research and Risk Assessment for Food Safety, Peking University, Beijing 100191, China
- Correspondence: (A.Z.); (G.L.); (Q.W.); (H.L.)
| | - Huangyuan Li
- Department of Preventive Medicine, School of Public Health, Fujian Medical University, Fuzhou 350108, China; (F.Z.); (H.H.)
- The Key Laboratory of Environment and Health, School of Public Health, Fujian Medical University, Fuzhou 350108, China
- Fujian Provincial Key Laboratory of Environment Factors and Cancer, School of Public Health, Fujian Medical University, Fuzhou 350108, China
- Correspondence: (A.Z.); (G.L.); (Q.W.); (H.L.)
| |
Collapse
|
9
|
van der Voet M, Teunis M, Louter-van de Haar J, Stigter N, Bhalla D, Rooseboom M, Wever KE, Krul C, Pieters R, Wildwater M, van Noort V. Towards a reporting guideline for developmental and reproductive toxicology testing in C. elegans and other nematodes. Toxicol Res (Camb) 2021; 10:1202-1210. [PMID: 34950447 PMCID: PMC8692742 DOI: 10.1093/toxres/tfab109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 10/07/2021] [Accepted: 10/27/2021] [Indexed: 11/13/2022] Open
Abstract
Implementation of reliable methodologies allowing Reduction, Refinement, and Replacement (3Rs) of animal testing is a process that takes several decades and is still not complete. Reliable methods are essential for regulatory hazard assessment of chemicals where differences in test protocol can influence the test outcomes and thus affect the confidence in the predictive value of the organisms used as an alternative for mammals. Although test guidelines are common for mammalian studies, they are scarce for non-vertebrate organisms that would allow for the 3Rs of animal testing. Here, we present a set of 30 reporting criteria as the basis for such a guideline for Developmental and Reproductive Toxicology (DART) testing in the nematode Caenorhabditis elegans. Small organisms like C. elegans are upcoming in new approach methodologies for hazard assessment; thus, reliable and robust test protocols are urgently needed. A literature assessment of the fulfilment of the reporting criteria demonstrates that although studies describe methodological details, essential information such as compound purity and lot/batch number or type of container is often not reported. The formulated set of reporting criteria for C. elegans testing can be used by (i) researchers to describe essential experimental details (ii) data scientists that aggregate information to assess data quality and include data in aggregated databases (iii) regulators to assess study data for inclusion in regulatory hazard assessment of chemicals.
Collapse
Affiliation(s)
| | - Marc Teunis
- Utrecht University of Applied Sciences, Innovative testing in Life Sciences & Chemistry, 3584 CH, Utrecht, the Netherlands
| | - Johanna Louter-van de Haar
- Utrecht University of Applied Sciences, Innovative testing in Life Sciences & Chemistry, 3584 CH, Utrecht, the Netherlands
| | - Nienke Stigter
- Utrecht University of Applied Sciences, Innovative testing in Life Sciences & Chemistry, 3584 CH, Utrecht, the Netherlands
| | - Diksha Bhalla
- KU Leuven, Centre of Microbial and Plant Genetics, Faculty of Bioscience Engineering, 3001, Leuven, Belgium
| | - Martijn Rooseboom
- Toxicology group Shell International B.V., 2596 HR, The Hague, the Netherlands
| | - Kimberley E Wever
- Radboud University Medical Center, Radboud Institute for Health Sciences, Department for Health Evidence, 6525 GA, Nijmegen, the Netherlands
| | - Cyrille Krul
- Utrecht University of Applied Sciences, Innovative testing in Life Sciences & Chemistry, 3584 CH, Utrecht, the Netherlands
| | - Raymond Pieters
- Utrecht University of Applied Sciences, Innovative testing in Life Sciences & Chemistry, 3584 CH, Utrecht, the Netherlands
- Utrecht University, Institute for Risk Assessment Sciences, 3584 CM, Utrecht, the Netherlands
| | | | - Vera van Noort
- KU Leuven, Centre of Microbial and Plant Genetics, Faculty of Bioscience Engineering, 3001, Leuven, Belgium
- Leiden University, Institute of Biology Leiden, 2333 BE, Leiden, the Netherlands
| |
Collapse
|
10
|
Rethinking agrochemical safety assessment: A perspective. Regul Toxicol Pharmacol 2021; 127:105068. [PMID: 34678328 DOI: 10.1016/j.yrtph.2021.105068] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 10/09/2021] [Accepted: 10/18/2021] [Indexed: 11/20/2022]
Abstract
Agrochemical safety assessment has traditionally relied on the use of animals for toxicity testing, based on scientific understanding and test guidelines developed in the 1980s. However, since then, there have been significant advances in the toxicological sciences that have improved our understanding of mechanisms underpinning adverse human health effects. The time is ripe to 'rethink' approaches used for human safety assessments of agrochemicals to ensure they reflect current scientific understanding and increasingly embrace new opportunities to improve human relevance and predictivity, and to reduce the reliance on animals. Although the ultimate aim is to enable a paradigm shift and an overhaul of global regulatory data requirements, there is much that can be done now to ensure new opportunities and approaches are adopted and implemented within the current regulatory frameworks. This commentary reviews current initiatives and emerging opportunities to embrace new approaches to improve agrochemical safety assessment for humans, and considers various endpoints and initiatives (including acute toxicity, repeat dose toxicity studies, carcinogenicity, developmental and reproductive toxicity, exposure-driven approaches, inhalation toxicity, and data modelling). Realistic aspirations to improve safety assessment, incorporate new technologies and reduce reliance on animal testing without compromising protection goals are discussed.
Collapse
|
11
|
Di Paolo C, Hoffmann S, Witters H, Carrillo JC. Minimum reporting standards based on a comprehensive review of the zebrafish embryo teratogenicity assay. Regul Toxicol Pharmacol 2021; 127:105054. [PMID: 34653553 DOI: 10.1016/j.yrtph.2021.105054] [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: 06/10/2021] [Revised: 09/08/2021] [Accepted: 10/04/2021] [Indexed: 11/20/2022]
Abstract
Reproductive toxicity chemical safety assessment involves extensive use of vertebrate animals for regulatory testing purposes. Although alternative methods such as the zebrafish embryo teratogenicity assay (identified in the present manuscript by the acronym ZETA) are promising for replacing tests with mammals, challenges to regulatory application involve lack of standardization and incomplete validation. To identify key protocol aspects and ultimately support improving this situation, a comprehensive review of the literature on the level of harmonization/standardization and validation status of the ZETA has been conducted. The gaps and needed advances of the available ZETA protocols were evaluated and discussed with respect to its applicability as an alternative approach for teratogenicity assessment. Based on the review outcomes, a set of minimum reporting standards for the experimental protocol is proposed. Together with other initiatives towards implementation of alternative approaches at the screening and regulatory levels, the application of minimum reporting requirements is anticipated to support future method standardization and validation, as well as identifying potential improvement aspects. Present findings are expected to ultimately support advancing the ongoing validation initiatives towards the regulatory acceptance of the ZETA.
Collapse
Affiliation(s)
- Carolina Di Paolo
- Shell Health, Shell International, B.V. Carel van Bylandtlaan 16, 2596, HR, The Hague, the Netherlands.
| | | | - Hilda Witters
- Flemish Institute for Technological Research (VITO), Unit Health, Boeretang 200, B-2400, Mol, Belgium
| | - Juan-Carlos Carrillo
- Shell Health, Shell International, B.V. Carel van Bylandtlaan 16, 2596, HR, The Hague, the Netherlands
| |
Collapse
|
12
|
Pippi B, Joaquim AR, Merkel S, Zanette RA, Nunes MEM, da Costa Silva DG, Schimith LE, Teixeira ML, Franco JL, Fernandes de Andrade S, Fuentefria AM. Antifungal activity and toxicological parameters of 8-hydroxyquinoline-5-sulfonamides using alternative animal models. J Appl Microbiol 2020; 130:1925-1934. [PMID: 33128257 DOI: 10.1111/jam.14915] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 10/14/2020] [Accepted: 10/26/2020] [Indexed: 11/29/2022]
Abstract
AIM The purpose of this study was to evaluate the antifungal activity and toxicological parameters of 8-hydroxyquinoline derivatives PH151 and PH153 using alternative animal models, to understand their behaviour when subjected to in vivo experiments. METHODS AND RESULTS We used Toll-deficient Drosophila melanogaster to test the protective effect of compounds against Candida albicans infection. Toxicological parameters were investigated in chicken and zebrafish embryos. PH151 and PH153 showed low toxicity and the treated flies with these compounds had a significantly higher survival rate than untreated flies after 7 days of infection. The compounds did not cause interruption of chicken embryogenesis. Zebrafish embryos exposed to compounds showed dose-dependent toxicity. CONCLUSIONS The data supported the potential of PH151 and PH153 for the treatment of systemic candidiasis and demonstrated to be appropriate drug candidates for further studies using mammalian models. SIGNIFICANCE AND IMPACT OF THE STUDY The increased incidence of Candida infections resistant to antifungals currently available requires acceleration of the discovery of new agents with properties of inhibiting this fungal pathogen. In this study, we have described the antifungal potential and toxicity of two 8-hydroxyquinoline derivatives using in vivo alternative models, and the results confirm their potential to be developed as new drug candidates.
Collapse
Affiliation(s)
- B Pippi
- Programa de Pós-Graduação em Microbiologia Agrícola e do Ambiente, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - A R Joaquim
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - S Merkel
- Programa de Pós-Graduação em Ciências Biológicas: Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - R A Zanette
- Programa de Pós-Graduação em Ciências Biológicas: Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - M E M Nunes
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica e Toxicologia, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - D G da Costa Silva
- Programa de Pós-Graduação em Ciências Biológicas, Universidade Federal do Pampa, São Gabriel, Brazil
| | - L E Schimith
- Faculdade de Biotecnologia, Universidade Federal do Pampa, São Gabriel, Brazil
| | - M L Teixeira
- Laboratório de Farmacologia, Instituto Federal Catarinense, Concórdia, Brazil
| | - J L Franco
- Programa de Pós-Graduação em Ciências Biológicas, Universidade Federal do Pampa, São Gabriel, Brazil
| | - S Fernandes de Andrade
- Programa de Pós-Graduação em Microbiologia Agrícola e do Ambiente, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.,Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - A M Fuentefria
- Programa de Pós-Graduação em Microbiologia Agrícola e do Ambiente, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.,Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| |
Collapse
|
13
|
de Sousa Melo B, Fernandes BHV, Lopes-Ferreira MVA, Henrique C, Piazza RMF, Luz D. Zebrafish embryo sensitivity test as in vivo platform to anti-Shiga toxin compound screening. Braz J Microbiol 2020; 51:1021-1027. [PMID: 32449119 DOI: 10.1007/s42770-020-00305-1] [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: 03/03/2020] [Accepted: 05/18/2020] [Indexed: 10/24/2022] Open
Abstract
Shiga toxin-producing Escherichia coli (STEC) pathotype secretes two types of AB5 cytotoxins (Stx1 and Stx2), responsible for complications such as hemorrhagic colitis (HC) and hemolytic uremic syndrome (HUS) in infected patients, which could lead to sequels and death. Currently, there is no effective treatment against the cytotoxic effect of these toxins. However, in order to approve any therapy molecule, an animal experiment is required in order to evaluate the efficacy and safety of therapeutic approaches. The use of alternative small host models is growing among human infectious disease studies, particularly the vertebrate zebrafish model, since relevant results have been described for pathogen-host interaction. In this sense, the present work aimed to analyze the toxic effect of Shiga toxins in zebrafish embryo model in order to standardize this method in the future to be used as a fast, simple, and efficient methodology for the screening of therapeutic molecules. Herein, we demonstrated that the embryos were sensitive in a dose-dependent manner to both Stx toxins, with LD50 of 22 μg/mL for Stx1 and 33 μg/mL for Stx2, and the use of anti-Stx polyclonal antibody abolished the toxic effect. Therefore, this methodology can be a rapid alternative method for selecting promising compounds against Stx toxins, such as recombinant antibodies.
Collapse
Affiliation(s)
| | - Bianca Helena Ventura Fernandes
- Laboratório de Controle Genético e Sanitário Animal, Unidade Zebrafish, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | | | - Camila Henrique
- Laboratório de Bacteriologia, Instituto Butantan, São Paulo, Brazil
| | | | - Daniela Luz
- Laboratório de Bacteriologia, Instituto Butantan, São Paulo, Brazil. .,Laboratório de Monoclonais, Instituto de Ciência e Tecnologia, Universidade Federal de São Paulo, Rua Talim, 330, São José dos Campos, SP, 12231-280, Brazil.
| |
Collapse
|
14
|
Souto C, Göethel G, Peruzzi CP, Cestonaro LV, Garcia I, Ávila DS, Eifler‐Lima V, Carmo H, Bastos MDL, Garcia SC, Arbo MD. Piperazine designer drugs elicit toxicity in the alternative in vivo model
Caenorhabditis elegans. J Appl Toxicol 2019; 40:363-372. [DOI: 10.1002/jat.3909] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Accepted: 09/06/2019] [Indexed: 12/17/2022]
Affiliation(s)
- Caroline Souto
- Laboratório de Toxicologia (LATOX), Departamento de Análises, Faculdade de FarmáciaUniversidade Federal do Rio Grande do Sul (UFRGS) Porto Alegre RS Brazil
| | - Gabriela Göethel
- Laboratório de Toxicologia (LATOX), Departamento de Análises, Faculdade de FarmáciaUniversidade Federal do Rio Grande do Sul (UFRGS) Porto Alegre RS Brazil
- Programa de Pós‐Graduação em Ciências Farmacêuticas, Faculdade de FarmáciaUniversidade Federal do Rio Grande do Sul (UFRGS) Porto Alegre RS Brazil
| | - Caroline Portela Peruzzi
- Laboratório de Toxicologia (LATOX), Departamento de Análises, Faculdade de FarmáciaUniversidade Federal do Rio Grande do Sul (UFRGS) Porto Alegre RS Brazil
- Programa de Pós‐Graduação em Ciências Farmacêuticas, Faculdade de FarmáciaUniversidade Federal do Rio Grande do Sul (UFRGS) Porto Alegre RS Brazil
| | - Larissa Vivan Cestonaro
- Laboratório de Toxicologia (LATOX), Departamento de Análises, Faculdade de FarmáciaUniversidade Federal do Rio Grande do Sul (UFRGS) Porto Alegre RS Brazil
- Programa de Pós‐Graduação em Ciências Farmacêuticas, Faculdade de FarmáciaUniversidade Federal do Rio Grande do Sul (UFRGS) Porto Alegre RS Brazil
| | - Ingrid Garcia
- Laboratório de Toxicologia (LATOX), Departamento de Análises, Faculdade de FarmáciaUniversidade Federal do Rio Grande do Sul (UFRGS) Porto Alegre RS Brazil
| | - Daiana Silva Ávila
- Grupo de Pesquisa em Bioquímica e Toxicologia em Caenorhabditis elegans (GBToxCE)Universidade Federal do Pampa (UNIPAMPA) Uruguaiana RS Brazil
| | - Vera Eifler‐Lima
- Programa de Pós‐Graduação em Ciências Farmacêuticas, Faculdade de FarmáciaUniversidade Federal do Rio Grande do Sul (UFRGS) Porto Alegre RS Brazil
- Laboratório de Síntese Orgânica Medicinal (LaSOM), Departamento de Produção de Matéria Prima, Faculdade de FarmáciaUniversidade Federal do Rio Grande do Sul (UFRGS) Porto Alegre RS Brazil
| | - Helena Carmo
- UCIBIO/REQUIMTE, Laboratório de Toxicologia, Departamento de Ciências Biológicas, Faculdade de FarmáciaUniversidade do Porto Porto Portugal
| | - Maria de Lurdes Bastos
- UCIBIO/REQUIMTE, Laboratório de Toxicologia, Departamento de Ciências Biológicas, Faculdade de FarmáciaUniversidade do Porto Porto Portugal
| | - Solange C. Garcia
- Laboratório de Toxicologia (LATOX), Departamento de Análises, Faculdade de FarmáciaUniversidade Federal do Rio Grande do Sul (UFRGS) Porto Alegre RS Brazil
- Programa de Pós‐Graduação em Ciências Farmacêuticas, Faculdade de FarmáciaUniversidade Federal do Rio Grande do Sul (UFRGS) Porto Alegre RS Brazil
| | - Marcelo Dutra Arbo
- Laboratório de Toxicologia (LATOX), Departamento de Análises, Faculdade de FarmáciaUniversidade Federal do Rio Grande do Sul (UFRGS) Porto Alegre RS Brazil
- Programa de Pós‐Graduação em Ciências Farmacêuticas, Faculdade de FarmáciaUniversidade Federal do Rio Grande do Sul (UFRGS) Porto Alegre RS Brazil
| |
Collapse
|
15
|
Weeks JC, Robinson KJ, Lockery SR, Roberts WM. Anthelmintic drug actions in resistant and susceptible C. elegans revealed by electrophysiological recordings in a multichannel microfluidic device. Int J Parasitol Drugs Drug Resist 2018; 8:607-628. [PMID: 30503202 PMCID: PMC6287544 DOI: 10.1016/j.ijpddr.2018.10.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 10/17/2018] [Accepted: 10/18/2018] [Indexed: 12/22/2022]
Abstract
Many anthelmintic drugs used to treat parasitic nematode infections target proteins that regulate electrical activity of neurons and muscles: ion channels (ICs) and neurotransmitter receptors (NTRs). Perturbation of IC/NTR function disrupts worm behavior and can lead to paralysis, starvation, immune attack and expulsion. Limitations of current anthelmintics include a limited spectrum of activity across species and the threat of drug resistance, highlighting the need for new drugs for human and veterinary medicine. Although ICs/NTRs are valuable anthelmintic targets, electrophysiological recordings are not commonly included in drug development pipelines. We designed a medium-throughput platform for recording electropharyngeograms (EPGs)-the electrical signals emitted by muscles and neurons of the pharynx during pharyngeal pumping (feeding)-in Caenorhabditis elegans and parasitic nematodes. The current study in C. elegans expands previous work in several ways. Detecting anthelmintic bioactivity in drugs, compounds or natural products requires robust, sustained pharyngeal pumping under baseline conditions. We generated concentration-response curves for stimulating pumping by perfusing 8-channel microfluidic devices (chips) with the neuromodulator serotonin, or with E. coli bacteria (C. elegans' food in the laboratory). Worm orientation in the chip (head-first vs. tail-first) affected the response to E. coli but not to serotonin. Using a panel of anthelmintics-ivermectin, levamisole and piperazine-targeting different ICs/NTRs, we determined the effects of concentration and treatment duration on EPG activity, and successfully distinguished control (N2) and drug-resistant worms (avr-14; avr-15; glc-1, unc-38 and unc-49). EPG recordings detected anthelmintic activity of drugs that target ICs/NTRs located in the pharynx as well as at extra-pharyngeal sites. A bus-8 mutant with enhanced permeability was more sensitive than controls to drug treatment. These results provide a useful framework for investigators who would like to more easily incorporate electrophysiology as a routine component of their anthelmintic research workflow.
Collapse
Affiliation(s)
- Janis C Weeks
- Institute of Neuroscience, University of Oregon, 1254 University of Oregon, Eugene, OR, 97403-1254, USA.
| | - Kristin J Robinson
- Institute of Neuroscience, University of Oregon, 1254 University of Oregon, Eugene, OR, 97403-1254, USA.
| | - Shawn R Lockery
- Institute of Neuroscience, University of Oregon, 1254 University of Oregon, Eugene, OR, 97403-1254, USA.
| | - William M Roberts
- Institute of Neuroscience, University of Oregon, 1254 University of Oregon, Eugene, OR, 97403-1254, USA.
| |
Collapse
|
16
|
Norberg-King TJ, Embry MR, Belanger SE, Braunbeck T, Butler JD, Dorn PB, Farr B, Guiney PD, Hughes SA, Jeffries M, Journel R, Lèonard M, McMaster M, Oris JT, Ryder K, Segner H, Senac T, Der Kraak GV, Whale G, Wilson P. An International Perspective on the Tools and Concepts for Effluent Toxicity Assessments in the Context of Animal Alternatives: Reduction in Vertebrate Use. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2018; 37:2745-2757. [PMID: 30359486 PMCID: PMC6534126 DOI: 10.1002/etc.4259] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 05/03/2018] [Accepted: 08/16/2018] [Indexed: 06/01/2023]
Abstract
Since the 1940s, effluent toxicity testing has been used to assess potential ecological impacts of effluents and help determine necessary treatment options for environmental protection prior to release. Strategic combinations of toxicity tests, analytical tools, and biological monitoring have been developed. Because the number of vertebrates utilized in effluent testing is thought to be much greater than that used for individual chemical testing, there is a new need to develop strategies to reduce the numbers of vertebrates (i.e., fish) used. This need will become more critical as developing nations begin to use vertebrates in toxicity tests to assess effluent quality. A workshop was held to 1) assess the state of science in effluent toxicity testing globally; 2) determine current practices of regulators, industry, private laboratories, and academia; and 3) explore alternatives to vertebrate (fish) testing options and the inclusion of modified/new methods and approaches in the regulatory environment. No single approach was identified, because of a range of factors including regulatory concerns, validity criteria, and wider acceptability of alternatives. However, a suite of strategies in a weight-of-evidence approach would provide the flexibility to meet the needs of the environment, regulators, and the regulated community; and this "toolbox" approach would also support reduced reliance on in vivo fish tests. The present Focus article provides a brief overview of wastewater regulation and effluent testing approaches. Alternative methodologies under development and some of the limitations and barriers to regulatory approaches that can be selected to suit individual country and regional requirements are described and discussed. Environ Toxicol Chem 2018;37:2745-2757. © 2018 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals, Inc. on behalf of SETAC.
Collapse
Affiliation(s)
| | | | | | | | | | | | - Brianna Farr
- Health and Environmental Science Institute, Washington, DC, USA
| | | | | | | | | | | | - Mark McMaster
- Environment and Climate Change Canada, Burlington, ON, Canada
| | | | | | | | | | | | | | | |
Collapse
|
17
|
Liu H, Wu Q, Chu T, Mo Y, Cai S, Chen M, Zhu G. High-dose acute exposure of paraquat induces injuries of swim bladder, gastrointestinal tract and liver via neutrophil-mediated ROS in zebrafish and their relevance for human health risk assessment. CHEMOSPHERE 2018; 205:662-673. [PMID: 29723724 DOI: 10.1016/j.chemosphere.2018.04.151] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Revised: 04/23/2018] [Accepted: 04/24/2018] [Indexed: 06/08/2023]
Abstract
The exact toxicological mechanisms of paraquat (PQ) poisoning are not entirely clear, especially on the high-level acute exposure. To assess the health risk of PQ, especially to suicidal individuals, accidental ingestion eaters, occupational groups, and special multitude, firstly we explored the acute toxic effect and the possible mechanisms of high-level exposure of PQ using zebrafish. The mainly target organs of PQ were swim bladder which is the homolog of the mammalian lung, followed by gastrointestinal tract and liver. Morphological malformations which were further defined by histopathologic examination include smaller size, fibrosis and inflammatory cell invasion for swim bladder; irregularly arranged or dissolved epithelial folds, loss of villous architecture, and ecclasis of mucosal cells in a smaller lumen for gastrointestinal tract; as well as smaller size, degeneration, fibrous proliferation, atrophy for liver. In addition, PQ enhanced leukocyte recruitment (neutrophil migrated first, followed by macrophage) into swim bladder and induced ROS which can be scavenged by glutathione. Moreover, qRT-PCR results showed that PQ increased the expression level of genes involved in the inflammatory response, such as L-1β, IL-6, IL-8, TNF-α, TNF-β, IFN-1, TGF-β, and NF-kB. For the first time, our results demonstrated that acute exposure of PQ induced pulmonary toxicity which was followed by gastrointestinal and hepatic toxicity via neutrophil-mediated ROS in zebrafish. In summary, these findings generated here will contribute to our better understanding of characteristics of PQ acute poisoning and can provide valuable information on better PQ poisoning treatments, occupational disease prevention, and providing theoretical foundation for risk management measures.
Collapse
Affiliation(s)
- Hongcui Liu
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310058, China
| | - Qiong Wu
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310058, China
| | - Tianyi Chu
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310058, China
| | - Yinyuan Mo
- Department of Pharmacology/Toxicology and Cancer Institute, University of Mississippi Medical Center, Jackson, MS 39216, USA.
| | - Shuyang Cai
- Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Mengli Chen
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310058, China.
| | - Guonian Zhu
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310058, China
| |
Collapse
|
18
|
Liu X, Zhang M, Liu H, Zhou A, Cao Y, Liu X. Preliminary characterization of the structure and immunostimulatory and anti-aging properties of the polysaccharide fraction ofHaematococcus pluvialis. RSC Adv 2018; 8:9243-9252. [PMID: 35541856 PMCID: PMC9078644 DOI: 10.1039/c7ra11153c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 02/23/2018] [Indexed: 11/21/2022] Open
Abstract
In this study, a polysaccharide fraction (HPP-c3-s1) was obtained from Haematococcus pluvialis using DEAE-52 anion exchange and Sephacryl S400 chromatographies. The structure of HPP-c3-s1 was partially characterized and its biological activity was investigated. HPP-c3-s1 is a homogeneous polysaccharide with a molecular weight of 23 413 kDa as determined by high-performance gel permeation chromatography and polyacrylamide gel electrophoresis. Periodate oxidation and Smith degradation analysis combined with GC-MS determined that HPP-c3-s1 contains 1 → 2, 1 → 3, 1 → 4, and probably a few 1 → 6 glycosyl linkages. Fourier transform infrared spectroscopy and nuclear magnetic resonance analyses indicate HPP-c3-s1 is a pyranose containing an amino and O-acetyl group. The sugar chains in HPP-c3-s1 contain both α and β glycosidic configurations, where the β configuration is the primary form. It was observed that the HPP-c3-s1 nanostructure had linear and branched forms at a concentration of 5 μg mL−1 and created different sized aggregates at a higher concentration of 50 μg mL−1. Furthermore, HPP-c3-s1 had significant immunostimulatory effects on splenocytes and B lymphocytes. In assays assessing anti-aging effects, HPP-c3-s1 extended the mean survival of Caenorhabditis elegans without adversely affecting reproduction. In addition, treatment with HPP-c3-s1 resulted in delays in age-related physiologic parameters, including body movement, rates of head swing and body bending, and accumulation of intestinal lipofuscinosis in C. elegans. Overall, these results suggest HPP-c3-s1 has remarkable immunomodulatory and anti-aging properties that may serve as the basis for development of functional foods and dietary supplements. HPP-c3-s1 is a pyranose with an average molecular weights of 23 413 kDa, which exhibited siginificant immunomodulatory and anti-aging activities.![]()
Collapse
Affiliation(s)
- Xiaojuan Liu
- Department of Food Science
- College of Food Science
- South China Agricultural University
- Guangzhou 510642
- China
| | - Miao Zhang
- Department of Food Science
- College of Food Science
- South China Agricultural University
- Guangzhou 510642
- China
| | - Han Liu
- Department of Food Science
- College of Food Science
- South China Agricultural University
- Guangzhou 510642
- China
| | - Aimei Zhou
- Department of Food Science
- College of Food Science
- South China Agricultural University
- Guangzhou 510642
- China
| | - Yong Cao
- Department of Food Science
- College of Food Science
- South China Agricultural University
- Guangzhou 510642
- China
| | - Xin Liu
- Department of Food Science
- College of Food Science
- South China Agricultural University
- Guangzhou 510642
- China
| |
Collapse
|
19
|
Legradi JB, Di Paolo C, Kraak MHS, van der Geest HG, Schymanski EL, Williams AJ, Dingemans MML, Massei R, Brack W, Cousin X, Begout ML, van der Oost R, Carion A, Suarez-Ulloa V, Silvestre F, Escher BI, Engwall M, Nilén G, Keiter SH, Pollet D, Waldmann P, Kienle C, Werner I, Haigis AC, Knapen D, Vergauwen L, Spehr M, Schulz W, Busch W, Leuthold D, Scholz S, vom Berg CM, Basu N, Murphy CA, Lampert A, Kuckelkorn J, Grummt T, Hollert H. An ecotoxicological view on neurotoxicity assessment. ENVIRONMENTAL SCIENCES EUROPE 2018; 30:46. [PMID: 30595996 PMCID: PMC6292971 DOI: 10.1186/s12302-018-0173-x] [Citation(s) in RCA: 136] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 10/31/2018] [Indexed: 05/04/2023]
Abstract
The numbers of potential neurotoxicants in the environment are raising and pose a great risk for humans and the environment. Currently neurotoxicity assessment is mostly performed to predict and prevent harm to human populations. Despite all the efforts invested in the last years in developing novel in vitro or in silico test systems, in vivo tests with rodents are still the only accepted test for neurotoxicity risk assessment in Europe. Despite an increasing number of reports of species showing altered behaviour, neurotoxicity assessment for species in the environment is not required and therefore mostly not performed. Considering the increasing numbers of environmental contaminants with potential neurotoxic potential, eco-neurotoxicity should be also considered in risk assessment. In order to do so novel test systems are needed that can cope with species differences within ecosystems. In the field, online-biomonitoring systems using behavioural information could be used to detect neurotoxic effects and effect-directed analyses could be applied to identify the neurotoxicants causing the effect. Additionally, toxic pressure calculations in combination with mixture modelling could use environmental chemical monitoring data to predict adverse effects and prioritize pollutants for laboratory testing. Cheminformatics based on computational toxicological data from in vitro and in vivo studies could help to identify potential neurotoxicants. An array of in vitro assays covering different modes of action could be applied to screen compounds for neurotoxicity. The selection of in vitro assays could be guided by AOPs relevant for eco-neurotoxicity. In order to be able to perform risk assessment for eco-neurotoxicity, methods need to focus on the most sensitive species in an ecosystem. A test battery using species from different trophic levels might be the best approach. To implement eco-neurotoxicity assessment into European risk assessment, cheminformatics and in vitro screening tests could be used as first approach to identify eco-neurotoxic pollutants. In a second step, a small species test battery could be applied to assess the risks of ecosystems.
Collapse
Affiliation(s)
- J. B. Legradi
- Institute for Environmental Research, Department of Ecosystem Analysis, ABBt–Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
- Environment and Health, VU University, 1081 HV Amsterdam, The Netherlands
| | - C. Di Paolo
- Institute for Environmental Research, Department of Ecosystem Analysis, ABBt–Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - M. H. S. Kraak
- FAME-Freshwater and Marine Ecology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P.O. Box 94248, 1090 GE Amsterdam, The Netherlands
| | - H. G. van der Geest
- FAME-Freshwater and Marine Ecology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P.O. Box 94248, 1090 GE Amsterdam, The Netherlands
| | - E. L. Schymanski
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, 6 Avenue du Swing, 4367 Belvaux, Luxembourg
| | - A. J. Williams
- National Center for Computational Toxicology, Office of Research and Development, U.S. Environmental Protection Agency, 109 T.W. Alexander Dr., Research Triangle Park, NC 27711 USA
| | - M. M. L. Dingemans
- KWR Watercycle Research Institute, Groningenhaven 7, 3433 PE Nieuwegein, The Netherlands
| | - R. Massei
- Department Effect-Directed Analysis, Helmholtz Centre for Environmental Research-UFZ, Permoserstr. 15, Leipzig, Germany
| | - W. Brack
- Department Effect-Directed Analysis, Helmholtz Centre for Environmental Research-UFZ, Permoserstr. 15, Leipzig, Germany
| | - X. Cousin
- Ifremer, UMR MARBEC, Laboratoire Adaptation et Adaptabilités des Animaux et des Systèmes, Route de Maguelone, 34250 Palavas-les-Flots, France
- INRA, UMR GABI, INRA, AgroParisTech, Domaine de Vilvert, Batiment 231, 78350 Jouy-en-Josas, France
| | - M.-L. Begout
- Ifremer, Laboratoire Ressources Halieutiques, Place Gaby Coll, 17137 L’Houmeau, France
| | - R. van der Oost
- Department of Technology, Research and Engineering, Waternet Institute for the Urban Water Cycle, Amsterdam, The Netherlands
| | - A. Carion
- Laboratory of Evolutionary and Adaptive Physiology, Institute of Life, Earth and Environment, University of Namur, 5000 Namur, Belgium
| | - V. Suarez-Ulloa
- Laboratory of Evolutionary and Adaptive Physiology, Institute of Life, Earth and Environment, University of Namur, 5000 Namur, Belgium
| | - F. Silvestre
- Laboratory of Evolutionary and Adaptive Physiology, Institute of Life, Earth and Environment, University of Namur, 5000 Namur, Belgium
| | - B. I. Escher
- Department of Cell Toxicology, Helmholtz Centre for Environmental Research-UFZ, Permoserstr. 15, 04318 Leipzig, Germany
- Eberhard Karls University Tübingen, Environmental Toxicology, Center for Applied Geosciences, 72074 Tübingen, Germany
| | - M. Engwall
- MTM Research Centre, School of Science and Technology, Örebro University, Fakultetsgatan 1, 70182 Örebro, Sweden
| | - G. Nilén
- MTM Research Centre, School of Science and Technology, Örebro University, Fakultetsgatan 1, 70182 Örebro, Sweden
| | - S. H. Keiter
- MTM Research Centre, School of Science and Technology, Örebro University, Fakultetsgatan 1, 70182 Örebro, Sweden
| | - D. Pollet
- Faculty of Chemical Engineering and Biotechnology, University of Applied Sciences Darmstadt, Stephanstrasse 7, 64295 Darmstadt, Germany
| | - P. Waldmann
- Faculty of Chemical Engineering and Biotechnology, University of Applied Sciences Darmstadt, Stephanstrasse 7, 64295 Darmstadt, Germany
| | - C. Kienle
- Swiss Centre for Applied Ecotoxicology Eawag-EPFL, Überlandstrasse 133, 8600 Dübendorf, Switzerland
| | - I. Werner
- Swiss Centre for Applied Ecotoxicology Eawag-EPFL, Überlandstrasse 133, 8600 Dübendorf, Switzerland
| | - A.-C. Haigis
- Institute for Environmental Research, Department of Ecosystem Analysis, ABBt–Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - D. Knapen
- Zebrafishlab, Veterinary Physiology and Biochemistry, University of Antwerp, Wilrijk, Belgium
| | - L. Vergauwen
- Zebrafishlab, Veterinary Physiology and Biochemistry, University of Antwerp, Wilrijk, Belgium
| | - M. Spehr
- Institute for Biology II, Department of Chemosensation, RWTH Aachen University, Aachen, Germany
| | - W. Schulz
- Zweckverband Landeswasserversorgung, Langenau, Germany
| | - W. Busch
- Department of Bioanalytical Ecotoxicology, UFZ–Helmholtz Centre for Environmental Research, Leipzig, Germany
| | - D. Leuthold
- Department of Bioanalytical Ecotoxicology, UFZ–Helmholtz Centre for Environmental Research, Leipzig, Germany
| | - S. Scholz
- Department of Bioanalytical Ecotoxicology, UFZ–Helmholtz Centre for Environmental Research, Leipzig, Germany
| | - C. M. vom Berg
- Department of Environmental Toxicology, Swiss Federal Institute of Aquatic Science and Technology, Eawag, Dübendorf, 8600 Switzerland
| | - N. Basu
- Faculty of Agricultural and Environmental Sciences, McGill University, Montreal, Canada
| | - C. A. Murphy
- Department of Fisheries and Wildlife, Michigan State University, East Lansing, USA
| | - A. Lampert
- Institute of Physiology (Neurophysiology), Aachen, Germany
| | - J. Kuckelkorn
- Section Toxicology of Drinking Water and Swimming Pool Water, Federal Environment Agency (UBA), Heinrich-Heine-Str. 12, 08645 Bad Elster, Germany
| | - T. Grummt
- Section Toxicology of Drinking Water and Swimming Pool Water, Federal Environment Agency (UBA), Heinrich-Heine-Str. 12, 08645 Bad Elster, Germany
| | - H. Hollert
- Institute for Environmental Research, Department of Ecosystem Analysis, ABBt–Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| |
Collapse
|
20
|
Huang Y, Zheng X, Zhang H, Ding H, Guo X, Yang Y, Chen X, Zhou Q, Du A. Site-Directed Mutagenesis Study Revealed Three Important Residues in Hc-DAF-22, a Key Enzyme Regulating Diapause of Haemonchus contortus. Front Microbiol 2017; 8:2176. [PMID: 29167662 PMCID: PMC5682392 DOI: 10.3389/fmicb.2017.02176] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 10/23/2017] [Indexed: 02/01/2023] Open
Abstract
Haemonchus contortus (H. contortus) is one of the most important parasites of small ruminants, especially goats and sheep. The complex life cycle of this nematode is a main obstacle for the control and prevention of haemonchosis. So far, a special form of arrested development called diapause different from the dauer stage in Caenorhabditis elegans (C. elegans) has been found in many parasitic nematodes. In our previous study, we have characterized a novel gene Hc-daf-22 from H. contortus sharing high homology with Ce-daf-22 and functional analysis showed this gene has similar biological function with Ce-daf-22. In this study, Hc-daf-22 mutants were constructed using site-directed mutagenesis, and carried out rescue experiments, RNA interference (RNAi) experiments and in vitro enzyme activity analysis with the mutants to further explore the precise function site of Hc-DAF-22. The results showed that Hc-daf-22 mutants could be expressed in the rescued ok693 worms and the expression positions were mainly in the intestine which was identical with that of Hc-daf-22 rescued worms. Through lipid staining we found that Hc-daf-22 could rescue daf-22 mutant (ok693) from the fatty acid metabolism deficiency while Hc-daf-22 mutants failed. Brood size and body length analyses in rescue experiment along with body length and life span analyses in RNAi experiment elucidated that Hc-daf-22 resembled Ce-daf-22 in effecting the development and capacity of C. elegans and mutants impaired the function of Hc-daf-22. Together with the protease activity assay, this research revealed three important active resides 84C/299H/349H in Hc-DAF-22 by site-directed mutagenesis.
Collapse
Affiliation(s)
- Yan Huang
- College of Animal Sciences, Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Zhejiang University, Hangzhou, China
| | - Xiuping Zheng
- College of Animal Sciences, Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Zhejiang University, Hangzhou, China
| | - Hongli Zhang
- Zhejiang Center of Animal Disease Control, Hangzhou, China
| | - Haojie Ding
- College of Animal Sciences, Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Zhejiang University, Hangzhou, China
| | - Xiaolu Guo
- College of Animal Sciences, Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Zhejiang University, Hangzhou, China
| | - Yi Yang
- College of Animal Sciences, Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Zhejiang University, Hangzhou, China
| | - Xueqiu Chen
- College of Animal Sciences, Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Zhejiang University, Hangzhou, China
| | - Qianjin Zhou
- Faculty of Life Science and Biotechnology, Ningbo University, Ningbo, China
| | - Aifang Du
- College of Animal Sciences, Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Zhejiang University, Hangzhou, China
| |
Collapse
|