1
|
Li J, Dai L, Feng Y, Cao Z, Ding Y, Xu H, Xu A, Du H. Multigenerational effects and mutagenicity of three flame retardants on germ cells in Caenorhabditis elegans. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 269:115815. [PMID: 38091675 DOI: 10.1016/j.ecoenv.2023.115815] [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: 09/10/2023] [Revised: 11/14/2023] [Accepted: 12/09/2023] [Indexed: 01/12/2024]
Abstract
Flame retardants (FRs) have raised public concerns because of their environmental persistence and negative impacts on human health. Recent evidence has revealed that many FRs exhibit reproductive toxicities and transgenerational impacts, whereas the toxic effects of FRs on germ cells remain barely explored. Here we investigated the multigenerational effects of three flame retardants (TBBPA, TCEP and TCPP) on germ cell development in Caenorhabditis elegans, and examined the germ cell mutagenicity of these FRs by using whole genome sequencing. Parental exposure to three FRs markedly increased germ cell apoptosis, and impeded oogenesis in F1-F6 offspring. In addition, the double-increased mutation frequencies observed in progeny genomes uncover the mutagenic actions of FRs on germ cells. Analysis of mutation spectra revealed that these FRs predominantly induced point mutations at A:T base pairs, whereas both small and large indels were almost unaffected. These results revealed the long-term effects of FRs on development and genomic stability of germ cells, which may pose risks to environmental organisms and human reproductive health. Taken together, our findings suggest that germ cell mutagenicity should be carefully examined for the environmental risk assessment of FRs and other emerging pollutants.
Collapse
Affiliation(s)
- Jiali Li
- Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, Anhui, China; Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, CAS, Hefei 230031, Anhui, China; Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, CAS, Hefei Institutes of Physical Science, CAS, Hefei 230031, Anhui, China
| | - Linglong Dai
- Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, CAS, Hefei 230031, Anhui, China; Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, CAS, Hefei Institutes of Physical Science, CAS, Hefei 230031, Anhui, China; Science Island Branch, Graduate School of USTC, Hefei 230026, Anhui, China
| | - Yu Feng
- Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, CAS, Hefei 230031, Anhui, China; Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, CAS, Hefei Institutes of Physical Science, CAS, Hefei 230031, Anhui, China; Science Island Branch, Graduate School of USTC, Hefei 230026, Anhui, China
| | - Zhenxiao Cao
- Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, CAS, Hefei 230031, Anhui, China; Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, CAS, Hefei Institutes of Physical Science, CAS, Hefei 230031, Anhui, China; School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Yuting Ding
- Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, CAS, Hefei 230031, Anhui, China; Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, CAS, Hefei Institutes of Physical Science, CAS, Hefei 230031, Anhui, China; School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Hao Xu
- Department of Neurosurgery, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, Anhui, China
| | - An Xu
- Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, CAS, Hefei 230031, Anhui, China; Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, CAS, Hefei Institutes of Physical Science, CAS, Hefei 230031, Anhui, China.
| | - Hua Du
- Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, CAS, Hefei 230031, Anhui, China; Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, CAS, Hefei Institutes of Physical Science, CAS, Hefei 230031, Anhui, China.
| |
Collapse
|
2
|
Feng Y, Cao Z, Xu A, Du H. Evaluation of toxicity and mutagenicity of oxaliplatin on germ cells in an alternative in vivo model Caenorhabditis elegans. Food Chem Toxicol 2023:113902. [PMID: 37331561 DOI: 10.1016/j.fct.2023.113902] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 06/05/2023] [Accepted: 06/15/2023] [Indexed: 06/20/2023]
Abstract
The platinum compound oxaliplatin is a widely used chemotherapeutic drug that shows a broad spectrum of activity in various human tumors. While the treatment-related side effects of oxaliplatin on directly treated individuals have been well-documented, little is known about the influence of oxaliplatin on germ cells and non-exposed progenies. Here we investigated the reproductive toxicity of oxaliplatin in a 3R-compliant in vivo model Caenorhabditis elegans, and evaluated the germ cell mutagenicity of oxaliplatin by using whole genome sequencing. Our results indicated that oxaliplatin treatment significantly disrupts development of spermatids and oocytes. By treating parental worms with oxaliplatin for three successive generations, sequencing data unveiled the clear mutagenic effects of oxaliplatin on germ cells. Analysis of genome-wide mutation spectra showed the preferentially induction of indels by oxaliplatin. In addition, we uncovered the involvement of translesion synthesis polymerase ζ in modulating mutagenic effects of oxaliplatin. These findings suggest that germ cell mutagenicity is worthy of consideration for the health risk assessment of chemotherapeutic drugs, while the combined use of alternative in vivo models and next generation sequencing technology appears to be a promising way for the preliminary safety assessment of various drugs.
Collapse
Affiliation(s)
- Yu Feng
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, CAS, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, CAS, Hefei, 230031, Anhui, PR China; Science Island Branch, Graduate School of USTC, Hefei, 230026, Anhui, PR China
| | - Zhenxiao Cao
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, CAS, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, CAS, Hefei, 230031, Anhui, PR China; School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei, 230026, Anhui, PR China
| | - An Xu
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, CAS, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, CAS, Hefei, 230031, Anhui, PR China.
| | - Hua Du
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, CAS, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, CAS, Hefei, 230031, Anhui, PR China.
| |
Collapse
|
3
|
Duan Z, Chen C, Ni C, Xiong J, Wang Z, Cai J, Tan W. How different is the remediation effect of biochar for cadmium contaminated soil in various cropping systems? A global meta-analysis. JOURNAL OF HAZARDOUS MATERIALS 2023; 448:130939. [PMID: 36860073 DOI: 10.1016/j.jhazmat.2023.130939] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 01/31/2023] [Accepted: 02/02/2023] [Indexed: 06/18/2023]
Abstract
Cadmium (Cd) poses great threats to human health as a major contaminant in agricultural soil. Biochar shows great potential in the remediation of agricultural soil. However, it remains unclear whether the remediation effect of biochar on Cd pollution is affected by various cropping systems. Here, this study used 2007 paired observations from 227 peer-reviewed articles and employed hierarchical meta-analysis to investigate the response of three types of cropping systems to the remediation of Cd pollution by using biochar. As a result, biochar application significantly reduced the Cd content in soil, plant roots and edible parts of various cropping systems. The decrease in Cd level ranged from 24.9% to 45.0%. The feedstock, application rate, and pH of biochar as well as soil pH and cation exchange capacity were dominant factors for Cd remediation effect of biochar, and their relative importance all exceeded 37.4%. Lignocellulosic and herbal biochar were found to be suitable for all cropping systems, while the effects of manure, wood and biomass biochar were limited in cereal cropping systems. Furthermore, biochar exhibited a more long-lasting remediation effect on paddy soils than on dryland. This study provides new insights into the sustainable agricultural management of typical cropping systems.
Collapse
Affiliation(s)
- Zihao Duan
- State Environmental Protection Key Laboratory of Soil Health and Green Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Chang Chen
- State Environmental Protection Key Laboratory of Soil Health and Green Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.
| | - Chunlan Ni
- State Environmental Protection Key Laboratory of Soil Health and Green Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Juan Xiong
- State Environmental Protection Key Laboratory of Soil Health and Green Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Zhen Wang
- State Environmental Protection Key Laboratory of Soil Health and Green Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Junxiong Cai
- State Environmental Protection Key Laboratory of Soil Health and Green Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China; Hubei Provincial Academy of Ecological and Environmental Science, Wuhan, Hubei 430072, China
| | - Wenfeng Tan
- State Environmental Protection Key Laboratory of Soil Health and Green Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| |
Collapse
|
4
|
Pfenninger M, Foucault Q, Waldvogel AM, Feldmeyer B. Selective effects of a short transient environmental fluctuation on a natural population. Mol Ecol 2023; 32:335-349. [PMID: 36282585 DOI: 10.1111/mec.16748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 09/21/2022] [Accepted: 10/21/2022] [Indexed: 01/11/2023]
Abstract
Natural populations experience continuous and often transient changes of environmental conditions. These in turn may result in fluctuating selection pressures leading to variable demographic and evolutionary population responses. Rapid adaptation as short-term response to a sudden environmental change has in several cases been attributed to polygenic traits, but the underlying genomic dynamics and architecture are poorly understood. In this study, we took advantage of a natural experiment in an insect population of the non-biting midge Chironomus riparius by monitoring genome-wide allele frequencies before and after a cold snap event. Whole genome pooled sequencing of time series samples revealed 10 selected haplotypes carrying ancient polymorphisms, partially with signatures of balancing selection. By constantly cold exposing genetically variable individuals in the laboratory, we could demonstrate with whole genome resequencing (i) that among the survivors, the same alleles rose in frequency as in the wild, and (ii) that the identified variants additively predicted fitness (survival time) of its bearers. Finally, by simultaneously sequencing the genome and the transcriptome of cold exposed individuals we could tentatively link some of the selected SNPs to the cis- and trans-regulation of genes and pathways known to be involved in cold response of insects, such as cytochrome P450 and fatty acid metabolism. Altogether, our results shed light on the strength and speed of selection in natural populations and the genomic architecture of its underlying polygenic trait. Population genomic time series data thus appear as promising tool for measuring the selective tracking of fluctuating selection in natural populations.
Collapse
Affiliation(s)
- Markus Pfenninger
- Department of Molecular Ecology, Senckenberg Biodiversity and Climate Research Centre, Frankfurt am Main, Germany.,LOEWE Centre for Translational Biodiversity Genomics, Senckenberg Biodiversity and Climate Research Centre, Frankfurt am Main, Germany.,Institute for Molecular and Organismic Evolution, Johannes Gutenberg University, Mainz, Germany
| | - Quentin Foucault
- Department of Molecular Ecology, Senckenberg Biodiversity and Climate Research Centre, Frankfurt am Main, Germany
| | - Ann-Marie Waldvogel
- Department of Ecological Genomics, Institute of Zoology, University of Cologne, Köln, Germany
| | - Barbara Feldmeyer
- Department of Molecular Ecology, Senckenberg Biodiversity and Climate Research Centre, Frankfurt am Main, Germany
| |
Collapse
|
5
|
Wang M, Feng Y, Cao Z, Yu N, Wang J, Wang X, Kang D, Su M, Hu J, Du H. Multiple generation exposure to ZnO nanoparticles induces loss of genomic integrity in Caenorhabditis elegans. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 249:114383. [PMID: 36508841 DOI: 10.1016/j.ecoenv.2022.114383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 11/27/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
Zinc oxide nanoparticles (ZnO NPs) are commonly used in industrial and household applications, prompting the assessment of their associated health risks. Previous studies indicated that ZnO NPs can induce somatic cell mutations, while the aging process appears to increase the mutagenicity of ZnO NPs. However, little is known about the influence of ZnO NPs on genome stability of germ cells, and non-exposed progeny. Here we show that 20 nm ZnO NPs exposure disrupts germ cell development, and elevates the overall mutation frequency of germ cells in Caenorhabditis elegans (C. elegans). We observed that pristine ZnO NPs elicit germ cell apoptosis to a greater extent than the 60-day aged ZnO NPs. By treating parental worms with ZnO NPs for seven successive generations, whole-genome sequencing data revealed that, although the frequency of point mutations is kept unchanged, large deletions are significantly increased in F8 worms. Furthermore, we found that the mutagenicity of ZnO NPs might be partially attributed to the release of Zn2+ ions. Together, our results demonstrate the genotoxic effects of ZnO NPs on germ cells, and the possible underlying mechanism. These findings suggest that germ cell mutagenicity is worthy of consideration for the health risk assessment of engineered NPs.
Collapse
Affiliation(s)
- Meimei Wang
- Department of Pathophysiology, School of Basic Medical Science, Anhui Medical University, No. 81, Mei-Shan Road, Hefei 230032, Anhui, PR China.
| | - Yu Feng
- High Magnetic Field Laboratory, Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, PR China
| | - Zhenxiao Cao
- High Magnetic Field Laboratory, Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, PR China; School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei 230026, PR China
| | - Na Yu
- Department of Pathophysiology, School of Basic Medical Science, Anhui Medical University, No. 81, Mei-Shan Road, Hefei 230032, Anhui, PR China
| | - Juan Wang
- Department of Public Health Inspection and Quarantine, School of Public Health, Anhui Medical University, Hefei 230032, Anhui, PR China
| | - Xiaowei Wang
- Department of Pathophysiology, School of Basic Medical Science, Anhui Medical University, No. 81, Mei-Shan Road, Hefei 230032, Anhui, PR China
| | - Dixiang Kang
- Department of Pathophysiology, School of Basic Medical Science, Anhui Medical University, No. 81, Mei-Shan Road, Hefei 230032, Anhui, PR China
| | - Mingqin Su
- Department of Pathophysiology, School of Basic Medical Science, Anhui Medical University, No. 81, Mei-Shan Road, Hefei 230032, Anhui, PR China
| | - Jian Hu
- Department of Pathophysiology, School of Basic Medical Science, Anhui Medical University, No. 81, Mei-Shan Road, Hefei 230032, Anhui, PR China
| | - Hua Du
- High Magnetic Field Laboratory, Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, PR China.
| |
Collapse
|
6
|
Cao Z, Wang M, Zhou T, Xu A, Du H. Whole-Genome Sequencing Reveals Germ Cell Mutagenicity of α-Endosulfan in Caenorhabditis elegans. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:16024-16032. [PMID: 36239620 DOI: 10.1021/acs.est.2c06817] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Endosulfan is an extensively used organochlorine pesticide around the world, which was classified as a persistent organic pollutant (POP) in 2009. Although previous studies have documented the reproductive toxicity of endosulfan in a variety of organisms, little is known about the influence of endosulfan on the genome stability of germ cells and nonexposed progeny. Here we applied whole-genome sequencing to explore the germ cell mutagenicity of α-endosulfan in Caenorhabditis elegans (C. elegans). We found that, although low doses of α-endosulfan exhibited a minor effect on the reproductive capacity of C. elegans, chronic exposure to 1 μM α-endosulfan significantly increased the mutation frequencies of nonexposed progeny. Further analysis of genome-wide mutation spectra demonstrated that α-endosulfan preferentially elicited A:T → G:C substitutions and clustered mutations. By using worms deficient in DNA damage response genes, our results suggest the involvement of translesion synthesis polymerase η in modulating α-endosulfan-induced mutations in germ cells. Together, these observations reveal the germ cell mutagenicity of α-endosulfan in C. elegans and the possible underlying mechanism. In addition, our findings implicate that germ cell mutagenicity might be a necessary consideration for the health risk assessment of environmental chemicals such as POPs.
Collapse
Affiliation(s)
- Zhenxiao Cao
- School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei 230026, Anhui, P. R. China
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, CAS; Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, CAS, Hefei 230031, Anhui, P. R. China
| | - Meimei Wang
- Department of Pathophysiology, School of Basic Medical Science, Anhui Medical University, No. 81 Mei-Shan Rd, Hefei 230032, Anhui, P. R. China
| | - Tong Zhou
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, CAS; Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, CAS, Hefei 230031, Anhui, P. R. China
| | - An Xu
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, CAS; Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, CAS, Hefei 230031, Anhui, P. R. China
| | - Hua Du
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, CAS; Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, CAS, Hefei 230031, Anhui, P. R. China
| |
Collapse
|
7
|
Toman R, Psenkova M, Tancin V, Miskeje M. Mutagens in raw ewe milk in Orava region, northern Slovakia: metals. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:62259-62271. [PMID: 35604602 DOI: 10.1007/s11356-022-20871-1] [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: 06/30/2021] [Accepted: 05/12/2022] [Indexed: 06/15/2023]
Abstract
The aim of this work was to determine the concentrations of selected mutagenic elements (As, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, and Se) in raw ewe milk from undisturbed environment in Orava region, northern Slovakia. There are possible sources of some of the analyzed metals which may be distributed from the metallurgical plants located in the Ostrava region, Czech Republic, and Katowice, Poland. In total, forty milk samples were analyzed in June and August using an inductively coupled plasma optical emission spectrometry. The differences in elements concentrations between the seasonal periods were not significant except of iron (p < 0.0001). The concentrations of most of the metals in ewe milk were low and under the permissible or recommended limits. However, arsenic and selenium concentrations were elevated and could pose a risk of the mutagenic effect, particularly in children. The frequency of element occurrence in June was as follows: Se > Fe > As > Cu > Mn > Ni > Co > Pb > Cr > Cd, and in August: Se > Fe = As > Cu > Mn > Pb > Co > Ni > Cr > Cd. The correlation analysis revealed very strong positive correlation between Cu:Pb (p < 0.05), very strong negative correlation between Fe:Se (p < 0.05). The strong correlations were also found between other elements. The present study showed that milk produced in the relatively undisturbed environment might contain various mutagenic elements. The relationships between the elements might result in the additive or synergistic effects of elements and increase the risk of their mutagenic effects even in low concentrations. Therefore, attention must be paid to the monitoring of metals in the areas where food sources destined especially for child nutrition are produced.
Collapse
Affiliation(s)
- Robert Toman
- Slovak University of Agriculture, Tr. A. Hlinku 2, 94976, Nitra, Slovak Republic.
| | - Martina Psenkova
- Slovak University of Agriculture, Tr. A. Hlinku 2, 94976, Nitra, Slovak Republic
| | - Vladimir Tancin
- Slovak University of Agriculture, Tr. A. Hlinku 2, 94976, Nitra, Slovak Republic
| | - Michal Miskeje
- Slovak University of Agriculture, Tr. A. Hlinku 2, 94976, Nitra, Slovak Republic
| |
Collapse
|
8
|
Khosrovyan A, Doria HB, Kahru A, Pfenninger M. Polyamide microplastic exposure elicits rapid, strong and genome-wide evolutionary response in the freshwater non-biting midge Chironomus riparius. CHEMOSPHERE 2022; 299:134452. [PMID: 35367228 DOI: 10.1016/j.chemosphere.2022.134452] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 03/20/2022] [Accepted: 03/25/2022] [Indexed: 06/14/2023]
Abstract
Susceptibility to hazardous materials and contamination is largely determined by genetic make-up and evolutionary history of affected organisms. Yet evolutionary adaptation and microevolutionary processes triggered by contaminants are rarely considered in ecotoxicology. Using an evolve and resequencing approach, we investigated genome-wide responses of the midge C. riparius exposed to virgin polyamide microplastics (0-180 μm size range, at concentration 1 g kg-1) during seven consecutive generations. The results were integrated to a parallel life-cycle experiment ran under the same exposure conditions. Emergence, life-cycle trait, showed first a substantial reduction in larval survival, followed by a rapid recovery within three generations. On the genomic level, we observed substantial selectively driven allele frequency changes (mean 0.566 ± 0.0879) within seven generations, associated with a mean selection coefficient of 0.322, indicating very strong selection pressure. Putative selection targets were mainly connected to oxidative stress in the microplastics exposed C. riparius population. This is the first multigenerational study on chironomids to provide evidence that upon exposure to polyamide microplastic there are changes on the genomic level, providing basis to rapid adaptation of aquatic organisms to microplastics.
Collapse
Affiliation(s)
- Alla Khosrovyan
- National Institute of Chemical Physics and Biophysics, Laboratory of Environmental Toxicology, 23 Akadeemia Tee, 12618, Tallinn, Estonia.
| | - Halina Binde Doria
- Dept. Molecular Ecology, Senckenberg Biodiversity and Climate Research Centre, Georg-Voigt-Str. 14-16, D-60325, Frankfurt am Main, Germany; LOEWE Centre for Translational Biodiversity Genomics, Senckenberg Biodiversity and Climate Research Centre, Senckenberganlage 25, 60325, Frankfurt am Main, Germany.
| | - Anne Kahru
- National Institute of Chemical Physics and Biophysics, Laboratory of Environmental Toxicology, 23 Akadeemia Tee, 12618, Tallinn, Estonia; Estonian Academy of Sciences, 6 Kohtu, 10130, Tallinn, Estonia
| | - Markus Pfenninger
- Dept. Molecular Ecology, Senckenberg Biodiversity and Climate Research Centre, Georg-Voigt-Str. 14-16, D-60325, Frankfurt am Main, Germany; LOEWE Centre for Translational Biodiversity Genomics, Senckenberg Biodiversity and Climate Research Centre, Senckenberganlage 25, 60325, Frankfurt am Main, Germany; Institute for Molecular and Organismic Evolution, Johannes Gutenberg University, Johann-Joachim-Becher-Weg 7, 55128, Mainz, Germany
| |
Collapse
|
9
|
Doria HB, Hannappel P, Pfenninger M. Whole genome sequencing and RNA-seq evaluation allowed to detect Cd adaptation footprint in Chironomus riparius. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 819:152843. [PMID: 35033566 DOI: 10.1016/j.scitotenv.2021.152843] [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: 10/26/2021] [Revised: 12/27/2021] [Accepted: 12/28/2021] [Indexed: 06/14/2023]
Abstract
Evolutionary adaptation and phenotypic plasticity are important processes on how organisms respond to pollutant exposure. We dissected here the contribution of both processes to increased tolerance in Chironomus riparius to cadmium (Cd) exposure in a multi-generation experiment and inferred the underlying genomic basis. We simulated environmentally realistic conditions by continuously increasing contaminant concentration in six replicates initiated with 1000 larvae each, three pre-exposed to Cd and three not exposed to Cd (no-Cd) over eight generations. We measured life-cycle traits, transcriptomic responses and genome-wide allele frequency changes from this evolve and resequencing (E&R) experiment. Overall, life cycle tests revealed little phenotypic adaptation to Cd exposure, but a slightly increase in survival in the first larval stage was observed. Population genomic analyses showed a strong genome-wide selective response in all replicates, highlighting two main biological functions involved in development and growth of the chironomids. Emphasizing that laboratory conditions continually exert selective pressure. However, the integration of the transcriptomic to the genomic data allowed to distinguish pathways specifically selected by the Cd exposure related to microtubules and organelles and cellular movement. Those pathways could be functionally related to an excretion of metals. Thus, our results indicate that genetic adaptation to Cd in C. riparius can happen within few generations under an environmentally relevant exposure scenario, but substantial phenotypic tolerance might take more time to arise. With our approach, we introduce an experimental setup to fill the existing gap in evolutionary ecotoxicology to investigate these early signs of genetic adaptation.
Collapse
Affiliation(s)
- Halina Binde Doria
- LOEWE Centre for Translational Biodiversity Genomics, Senckenberg Biodiversity and Climate Research Centre, Georg-Voigt-Str. 14-16, D-60325 Frankfurt am Main, Germany; Department of Molecular Ecology, Senckenberg Biodiversity and Climate Research Centre, Georg-Voigt-Str. 14-16, D-60325 Frankfurt am Main, Germany.
| | - Pauline Hannappel
- Department of Molecular Ecology, Senckenberg Biodiversity and Climate Research Centre, Georg-Voigt-Str. 14-16, D-60325 Frankfurt am Main, Germany
| | - Markus Pfenninger
- LOEWE Centre for Translational Biodiversity Genomics, Senckenberg Biodiversity and Climate Research Centre, Georg-Voigt-Str. 14-16, D-60325 Frankfurt am Main, Germany; Department of Molecular Ecology, Senckenberg Biodiversity and Climate Research Centre, Georg-Voigt-Str. 14-16, D-60325 Frankfurt am Main, Germany; Institute for Molecular and Organismic Evolution, Johannes Gutenberg University, Johann-Joachim-Becher-Weg 7, 55128 Mainz, Germany
| |
Collapse
|
10
|
Pfenninger M, Doria HB, Nickel J, Thielsch A, Schwenk K, Cordellier M. Spontaneous rate of clonal single nucleotide mutations in Daphnia galeata. PLoS One 2022; 17:e0265632. [PMID: 35363773 PMCID: PMC8975155 DOI: 10.1371/journal.pone.0265632] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 03/05/2022] [Indexed: 11/30/2022] Open
Abstract
Mutations are the ultimate source of heritable variation and therefore the fuel for evolution, but direct estimates of mutation rates exist only for few species. We estimated the spontaneous single nucleotide mutation rate among clonal generations in the waterflea Daphnia galeata with a short-term mutation accumulation approach. Individuals from eighteen mutation accumulation lines over five generations were deep sequenced to count de novo mutations that were not present in a pool of F1 individuals, representing the parental genotype. We identified 12 new nucleotide mutations in 90 clonal generational passages. This resulted in an estimated single nucleotide mutation rate of 0.745 x 10-9 (95% c.f. 0.39 x 10-9-1.26 x 10-9), which is slightly lower than recent estimates for other Daphnia species. We discuss the implications for the population genetics of Cladocerans.
Collapse
Affiliation(s)
- Markus Pfenninger
- Department Molecular Ecology, Senckenberg Biodiversity and Climate Research Centre, Frankfurt am Main, Germany
- Institute for Molecular and Organismic Evolution, Johannes Gutenberg University, Mainz, Germany
- LOEWE Centre for Translational Biodiversity Genomics, Senckenberg Biodiversity and Climate Research Centre, Frankfurt am Main, Germany
| | - Halina Binde Doria
- Department Molecular Ecology, Senckenberg Biodiversity and Climate Research Centre, Frankfurt am Main, Germany
- LOEWE Centre for Translational Biodiversity Genomics, Senckenberg Biodiversity and Climate Research Centre, Frankfurt am Main, Germany
| | - Jana Nickel
- Institut für Zoologie, Fakultät für Mathematik, Informatik und Naturwissenschaften, Universität Hamburg, Hamburg, Germany
| | - Anne Thielsch
- Institute for Environmental Sciences, Universität Koblenz-Landau, Landau, Germany
| | - Klaus Schwenk
- Institute for Environmental Sciences, Universität Koblenz-Landau, Landau, Germany
| | - Mathilde Cordellier
- Institut für Zoologie, Fakultät für Mathematik, Informatik und Naturwissenschaften, Universität Hamburg, Hamburg, Germany
| |
Collapse
|
11
|
Waldvogel AM, Pfenninger M. Temperature dependence of spontaneous mutation rates. Genome Res 2021; 31:1582-1589. [PMID: 34301628 PMCID: PMC8415371 DOI: 10.1101/gr.275168.120] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 07/21/2021] [Indexed: 11/29/2022]
Abstract
Mutation is the source of genetic variation and the fundament of evolution. Temperature has long been suggested to have a direct impact on realized spontaneous mutation rates. If mutation rates vary in response to environmental conditions, such as the variation of the ambient temperature through space and time, they should no longer be described as species-specific constants. By combining mutation accumulation with whole-genome sequencing in a multicellular organism, we provide empirical support to reject the null hypothesis of a constant, temperature-independent mutation rate. Instead, mutation rates depended on temperature in a U-shaped manner with increasing rates toward both temperature extremes. This relation has important implications for mutation-dependent processes in molecular evolution, processes shaping the evolution of mutation rates, and even the evolution of biodiversity as such.
Collapse
Affiliation(s)
- Ann-Marie Waldvogel
- Senckenberg Biodiversity and Climate Research Centre, 60325 Frankfurt am Main, Germany
- Institute of Zoology, University of Cologne, 50674 Cologne, Germany
| | - Markus Pfenninger
- Senckenberg Biodiversity and Climate Research Centre, 60325 Frankfurt am Main, Germany
- LOEWE Centre for Translational Biodiversity Genomics, Senckenberg Biodiversity and Climate Research Centre, 60325 Frankfurt am Main, Germany
- Institute for Organismic and Molecular Evolution, Johannes Gutenberg University, 55128 Mainz, Germany
| |
Collapse
|