Amélie Châtel

Amélie Châtel
Catholic University of the West | UCO · Faculty of Sciences

About

60
Publications
23,814
Reads
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1,409
Citations
Introduction
I'm working on the impact of emerging contaminants such as nanomaterials and micro and nanoplastics on aquatic invertebrates (estuarine species : Hediste diversicolor and Scrobicularia plana and marine species : Mytilus edulis) at molecular, cellular, individual levels. My research includes field sampling as well and lab approaches using different scale scenarios : in vitro, microscosm, mesocosm exposures.
Additional affiliations
January 2007 - March 2009
Johannes Gutenberg-Universität Mainz
Position
  • PhD Student
September 2006 - December 2009
Université de Bretagne Occidentale
Position
  • PhD Student
Education
September 2004 - July 2006
University of Nantes
Field of study
  • Biology, Biotechnology and therapeutic research

Publications

Publications (60)
Article
Plastics pollution in marine environment has become an issue of increasing scientific concern. This work aims to study the temporal and spatial distribution of plastics in sediments from three different Tunisian ecosystems; Rimel Beach, Bizerta lagoon and Ichkeul lake. Sediment sampling was conducted in surface (2 cm) and depth (15 cm) during sprin...
Article
Full-text available
Blossoming advancements and implementation of technologies in nanosciences have thrown open avenues for the nano-revolution, which divulge the contribution of microorganisms in bio and green synthesis of nanomaterials (NMs), which seemed to have drawn indisputable attention of researchers towards this new area of research. However, many approaches...
Article
The Seine Estuary is historically one of the most contaminated estuaries in Europe. In 2002 the estuary underwent major redevelopment which emphasized environmental remediation to measure biological effects. The present study investigated the health status of the sentinel species Hediste diversicolor in the Seine estuary by comparing data from a sa...
Article
Full-text available
The widespread use and release of nanomaterials (NMs) in aquatic ecosystems is a concerning issue as well as the fate and behavior of the NMs in relation to the aquatic organisms. In this work, the freshwater microcrustacean D. magna was exposed to 12 different and well-known NMs under the same conditions for 24h and then placed in clean media for...
Article
Full-text available
Nanotechnology is a key enabling technology with billions of euros in global investment from public funding, which include large collaborative projects that have investigated environmental and health safety aspects of nanomaterials, but the reuse of accumulated data is clearly lagging behind. Here we summarize challenges and provide recommendations...
Article
Full-text available
The risk of plastic debris, and specifically micro(nano)plastic particles, to ecosystems remains to be fully characterized. One particular issue that warrants further characterization is the hazards associated with chemical additives within micro(nano)plastic as they are not chemically bound within the polymers and can be persistent and biologicall...
Article
Full-text available
Plastic particles have been described in aquatic ecosystems worldwide. An increasing number of studies have tried to evaluate the toxic impacts of microplastics (1–5000 µm) but also nanoplastics (<1 µm) in marine and freshwater organisms. However, the wide variety of plastic particles characteristics such as various sizes, shapes, functionalization...
Article
Plastic particles are ubiquitous in marine and freshwater environments. While many studies have focused on the toxicity of microplastics (MPs) and nanoplastics (NPs) in aquatic environments there is no clear conclusion on their environmental risk, which can be attributed to a lack of standardization of protocols for in situ sampling, laboratory exp...
Poster
Full-text available
L’utilisation de nanomatériaux (NMs) soulève certaines interrogations en ce qui concerne leur devenir dans les compartiments environnementaux et leurs effets potentiels vis-à-vis des organismes aquatiques. L’une des singularités de ces substances est leur dualité d’action, à la fois physique (i.e. adhésion, adsorption, altération physique des tissu...
Article
The implementation of Safe(r) by Design (SbD) in industrial innovations requires an integrated approach where the human, environmental and economic impact of the SbD measures is evaluated across and throughout the nanomaterial (NM) life cycle. SbD was implemented in six industrial companies where SbD measures were applied to NMs, nano-enabled produ...
Article
Production of Manufactured Nanomaterials (MNMs) has increased extensively due to economic interest in the current years. However, this widespread use raises concern about their impact on human and environment. Current efforts are made, both at national and international levels to help developing safer MNMs in the market. In order to assess hazards...
Article
Full-text available
Since nanomaterials (NMs) are particulate contaminants, their first contact with organisms is a physical encounter ruled by physic-chemical processes that can determinate the potential NMs accumulation, toxicity, and trophic transfer. Freshwater ecosystems often become a final depository for NMs, so they can get in contact with the biota, especiall...
Article
Full-text available
The presence of plastic debris < 5 mm called microplastics (MPs) which results mainly from macroplastic’s fragmentation has been reported in aquatic ecosystems. Several studies have shown that MPs are persistent and their accumulation was observed in various aquatic species. However, the majority of studies focused on marine species, and much less...
Article
The aim of the present study was to evaluate the presence and potential toxic effects of plastic fragments (< 400 μm) of polyethylene and polypropylene on the Pacific oyster Crassostrea gigas. Oysters were exposed to environmentally relevant concentrations (0, 0.008, 10, 100 μg of particles/L) during 10 days, followed by a depuration period of 10 d...
Chapter
This chapter addresses the problematic of microplastics in aquatic environments through: the description of microplastics and their sources and distribution, their fate and behaviour, and also their presence and potential effect on aquatic fauna.
Article
Manufactured nanomaterial production is out pacing the ability to investigate environmental hazard using current regulatory paradigms, causing a backlog of materials requiring testing. To ameliorate this issue, regulatory bodies have proposed integrating safety into the production of novel nanomaterials, allowing for hazards to be identified early...
Poster
Full-text available
Flow cytometry could be useful for studying algae–NMs interaction. The algae-NMs interaction depends on: - The type of algae: Specially different for Desmodesmus subspicatus - The NMs properties: composition and physic-chemical Potential relevance of bio-nano interaction for the categorization of NMs
Presentation
The interaction between three different microalgae with 12 metallic nanomaterials and the physio-chemical properties that can be related
Poster
The Seine estuary plays an important ecological and socio-economic role but is also the most stressed estuary in France. The northern mudflat of the Seine estuary is continuously subjected for long time to complex environmental stressors, such as chemical pollution and physical modifications such as harbor construction (e.g. the construction of “Po...
Article
The main objective of the present study was to explore the potential link between acetylcholinesterase (AChE) activity and burrowing behaviour of the ragworm Hediste diversicolor, which may have consequences at higher levels of biological organisation. Two complementary studies were conducted. AChE activity, at the sub-individual level, and behavio...
Poster
The Seine estuary plays an important socio-economic and ecological role but is also the most stressed estuary in France. The northern mudflat of the Seine estuary is continuously subjected for long time to complex environmental stressors, such as chronic chemical pollution, physical modifications such as harbor construction (e.g. the construction o...
Article
Full-text available
The impact of a microplastic (MP) mixture composed of polyethylene (PE) and polypropylene (PP) plastic particles, prepared from commercially available products, was evaluated in blue mussels Mytilus spp. exposed to three environmentally relevant concentrations: 0.008 µg L −1 (low), 10 µg L −1 (medium), and 100 µg L −1 (high). Organisms were exposed...
Poster
État de la santé environnementale d’Hediste diversicolor et Scrobicularia Plana dans la vasière nord de l’estuaire de la Seine : une approche historique (2002-2018). Le présent travail s’inscrit dans le cadre du projet GIP-SEINE AVAL 6 SENTINELLES, qui cible deux compartiments clefs du fonctionnement de l’écosystème de l’estuaire de la Seine au ni...
Article
To have an understanding of potential mechanistic effects, sublethal endpoints able to discriminate between nanomaterials with similar physical and chemical features need to be used. In this sense, quantitative PCR was used to measure a battery of genes linked to a wide array of different cellular processes. Gene expression was measured in Mytilus...
Article
Manufactured nanomaterials are an ideal test case of the precautionary principle due to their novelty and potential environmental release. In the context of regulation, it is difficult to implement for manufactured nanomaterials as current testing paradigms identify risk late into the production process, slowing down innovation and increasing costs...
Article
Full-text available
Anthropogenic influences on the environment have been become a focal point for many social and political endeavors. With an ever-increasing rate of new contaminants being introduced into the environment every year, regulatory policies have begun to shift to prevention rather than mitigation. However, current in vivo testing strategies, in addition...
Presentation
Les déchets plastiques subissent des transformations dans l'environnement (effet des UV, des courants..) conduisant à la formation de débris de taille micrométrique et nanométrique appelés microplastiques (MP) et nanoplastiques. Des études récentes montrent que ces fragments sont rémanents et leur accumulation a été observée chez diverses espèces a...
Article
Identification of contamination in estuarine ecosystems that are impacted by anthropogenic pressures, such as the Seine estuary, is difficult to determine without considering the role environmental variation plays on the end points selected. Currently, there is interest in identifying methods in which the influence of confounding factors can be des...
Article
Combined influence of oxygenation and salinity on agglomeration and/or aggregation kinetics of silver (Ag) nanomaterials NM-300K was conducted and the relationship between their physico-chemical fate and toxicity towards an estuarine bivalve was established. The results showed that the presence of NaCl under oxygen conditions (8.5 ppm) promoted the...
Poster
In the second half of the 20th century, the production of plastic expanded resulting in the elaboration of various products from diverse plastic types. Nowadays, plastic products can be found in several fields (mainly as packaging), such as health, energy generation, construction, automotive industries, electronics, and textiles. Since the early 19...
Article
In recent years, the implication of genomics into ecotoxicological studies has been studied closely to allow a better understanding of organism’s responses to environmental contaminants including engineering nanomaterials (ENMs). ENMs are increasingly produced for various applications including cosmetics, electronics, sports equipment, biomedicine...
Article
The field of environmental toxicology developed as a result of growing concerns about anthropogenic influences on the environment and how to ameliorate ecological impact. Many governmental bodies are beginning to emphasize prevention rather than mitigation when addressing novel products, leading to more of a focus on identifying potential toxicity...
Article
Environmental risk assessment of engineered nanomaterials (ENMs) is an emergent field since nanotechnology industry is rapidly growing due to the interesting physicochemical properties of nanomaterials. Metal-based nanomaterials are among the most rapidly commercialized materials and their toxicity towards aquatic animals have been investigated at...
Article
Nanotechnology is a much promising field of science and technology with applications in a wide range of areas such as electronics, biomedical applications, energy, and cosmetics. Metal-based engineered nanoparticles (ENPs) are common in many technological applications; some of the most common nanoparticles available commercially are silver, gold, c...
Article
Evaluation of DNA quality of gametes is a relevant method to predict potential consequences of pollutants in the next generations, as it allows to define adverse outcome pathways implicated in pollutant-mediated toxicity for risk assessment. In the present study, a comet assay was developed for the spermatozoa of Scrobicularia plana exposed to 10 a...
Chapter
Full-text available
The ubiquitous presence and persistency of microplastics (MPs) in aquatic environments are of particular concern, since they constitute a potential threat to marine organisms and ecosystems. However, evaluating this threat and the impacts of MP on aquatic organisms is challenging. MPs form a very wide range of materials with different sizes, shapes...
Article
Because of their antibacterial properties, silver engineered nanomaterials (Ag ENMs) are included in many products. This study used a standardized Ag NM (NM-300K, 20 nm) supplied with a stabilizing agent. The aim was to investigate the behavior of Ag NM in an estuarine-like medium at two salinities (15 and 30 practical salinity unit). Uptake as wel...
Article
Full-text available
Derived polycyclic aromatic hydrocarbons (PAHs) such as nitro-PAHs are present in the environment and are known to be much more toxic than PAHs compounds. However, very few studies have analysed their effects on the aquatic environment and none have investigated the freshwater environment. In the present study, we determined whether 1-nitropyrene (...
Article
Full-text available
The objective of this paper is to synthesize results from seven published research papers employing different experimental approaches to evaluate the fate of metal-based nanoparticles (Ag NPs, Au NPs, CuO NPs, CdS NPs, ZnO NPs) in the marine environment and their effects on two marine endobenthic species, the bivalve Scrobicularia plana and the rag...
Article
Full-text available
Octopamine (OA) is an important neuroactive substance that modulates several physiological functions and behaviors of various invertebrate species. This biogenic monoamine, structurally related to noradrenaline, acts as a neurotransmitter, a neuromodulator or a neurohormone in insects. The tyramine-β-hydroxylase (TBH) catalyzes the last step in OA...
Article
Full-text available
The use of DNA adduct analysis has previously focused on the use of marine organisms for biomonitoring, whereas similar investigations in freshwater organisms are sparse. In that context, we have investigated the relevance of DNA adducts as biomarkers of genotoxicity in the freshwater mussels Dreissena polymorpha. The objective of the present study...
Article
Full-text available
Apoptosis signaling pathway was investigated in the marine mussel Mytilus galloprovincialis exposed to various stressors. Analyses were performed in mussels exposed to two major pollutants of the aquatic environment: tributyltin and the water soluble fraction of diesel oil, for 1 h and animals were then maintained in sea water for a recovery period...
Article
Full-text available
In the present study, we analyzed the effects of two major pollutants of the environment, tributyltin (TBT) and water-accommodated fraction (WAF) of diesel oil, on MAP kinase activation, apoptosis induction and DNA damage, in the marine sponge Suberites domuncula. Our results clearly demonstrated a differential activation of the MAPKs depending on...
Article
In the present study, the effects of environmental pollutants have been investigated in the Mediterranean mussel Mytilus galloprovincialis as sentinel species. For the purpose of detecting water contamination in the early stages, biomarkers of effect and exposure must be studied. Most specifically, proteins of intracellular signaling pathways appea...
Article
Full-text available
1 EA 4326 « Facteurs nerveux et structuration tissulaire » UBO -Brest Sections de rattachement : 65/68 Secteur : secondaire RÉSUMÉ. Les voies de signalisation des MAP kinases sont d'importants médiateurs activés en réponse à une grande variété de signaux extracellulaires (xénobiotiques, facteurs de croissance, stress osmotique, choc thermique, UV…)...
Article
The aim of this study was to evaluate the effect of two types of pollutants, Tributyltin (TBT) and Polycyclic Aromatic Hydrocarbons (PAHs), on MAP kinase signaling pathway activation and on apoptosis induction, on two marine invertebrates, the mussel Mytilus galloprovincialis and the sponge Suberites domuncula. It was shown that animal exposure to...
Article
Stimulation of MAP kinase signal transduction pathway by various stressful stimuli was investigated in the marine bivalve Mytilus galloprovincialis. Analyses were performed in animals exposed in laboratory to selected pollutants and in mussels collected in winter and summer along the eastern Adriatic coast (Croatia). Effects of oxidative stress, in...
Chapter
Full-text available
Multicellular organisms derived from one common ancestor, the Urmetazoa. The only living fossils, which can testify about the earliest evolutionary processes in Metazoa on the molecular level are sponges (phylum: Porifera). The present study outlines that stem cells may play essential roles in cellular specialization, embryogenesis and sponge Baupl...

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Projects

Projects (7)
Project
Toxicité des micro et nanoparticules de plastiques vis à vis d’organismes aquatiques le long du continuum eau douce-eau marine : évaluation du transfert trophique
Project
Assessing microplastics contamination in biotic compartments in the Seine estuary and evaluate toxic effects on the annelid polychaete Hediste diversicolor