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Laranjeiro F, Rotander A, López-Ibáñez S, Vilas A, Södergren Seilitz F, Clérandeau C, Sampalo M, Rial D, Bellas J, Cachot J, Almeda R, Beiras R. Comparative assessment of the acute toxicity of commercial bio-based polymer leachates on marine plankton. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 946:174403. [PMID: 38960198 DOI: 10.1016/j.scitotenv.2024.174403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 06/23/2024] [Accepted: 06/29/2024] [Indexed: 07/05/2024]
Abstract
Conventional plastics have become a major environmental concern due to their persistence and accumulation in marine ecosystems. The development of potential degradable polymers (PBP), such as polyhydroxyalkanoates (PHAs) and polylactic acid (PLA), has gained attention as an alternative to mitigate plastic pollution, since they have the potential to biodegrade under certain conditions, and their production is increasing as replacement of conventional polyolefins. This study aimed to assess and compare the toxicity of leachates of pre-compounding PBP (PLA and the PHA, polyhydroxybutyrate-covalerate (PHBv)) and polypropylene (PP) on five marine planktonic species. A battery of standard bioassays using bacteria, microalgae, sea urchin embryos, mussel embryos and copepod nauplii was conducted to assess the toxicity of leachates from those polymers. Additionally, the presence of chemical additives in the leachates was also verified through GC-MS and LC-HRMS analysis. Results showed that PHBv leachates exhibited higher toxicity compared to other polymers, with the microalgae Rhodomonas salina, being the most sensitive species to the tested leachates. On the other hand, PP and PLA generally displayed minimal to no toxicity in the studied species. Estimated species sensitivity distribution curves (SSD) show that PHBv leachates can be 10 times more hazardous to marine plankton than PP or PLA leachates, as demonstrated by the calculated Hazardous Concentration for 5 % of species (HC5). Qualitative chemical analysis supports the toxicological results, with 80 % of compounds being identified in PHBv leachates of which 2,4,6-trichlorophenol is worth mentioning due to the deleterious effects to aquatic biota described in literature. These findings underscore the fact that whereas environmental persistence can be targeted using PBP, the issue of chemical safety remains unsolved by some alternatives, such as PHBv. Gaining a comprehensive understanding of the toxicity profiles of PBP materials through a priori toxicological risk assessment is vital for their responsible application as alternatives to conventional plastics.
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Affiliation(s)
- F Laranjeiro
- ECIMAT, Centro de Investigación Mariña (CIM), Universidade de Vigo, 36331 Vigo, Galicia, Spain.
| | - A Rotander
- MTM Research Centre, Örebro University, Örebro, Sweden
| | - S López-Ibáñez
- ECIMAT, Centro de Investigación Mariña (CIM), Universidade de Vigo, 36331 Vigo, Galicia, Spain
| | - A Vilas
- ECIMAT, Centro de Investigación Mariña (CIM), Universidade de Vigo, 36331 Vigo, Galicia, Spain
| | | | - C Clérandeau
- EPOC, University of Bordeaux, CNRS, Bordeaux INP, UMR 5805, F-33600 Pessac, France
| | - M Sampalo
- EOMAR, ECOAQUA, University of Las Palmas of Gran Canaria, Canary Islands, Spain
| | - D Rial
- Instituto Español de Oceanografía (IEO-CSIC), Centro Oceanográfico de Vigo, Subida a Radio Faro, 50-52 36390 Vigo, Galicia, Spain
| | - J Bellas
- Instituto Español de Oceanografía (IEO-CSIC), Centro Oceanográfico de Vigo, Subida a Radio Faro, 50-52 36390 Vigo, Galicia, Spain
| | - J Cachot
- EPOC, University of Bordeaux, CNRS, Bordeaux INP, UMR 5805, F-33600 Pessac, France
| | - R Almeda
- EOMAR, ECOAQUA, University of Las Palmas of Gran Canaria, Canary Islands, Spain
| | - R Beiras
- ECIMAT, Centro de Investigación Mariña (CIM), Universidade de Vigo, 36331 Vigo, Galicia, Spain
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Miralha A, Contins M, Carpenter LBT, Pinto RL, Marques Calderari MRC, Neves RAF. Leachates of weathering plastics from an urban sandy beach: Toxicity to sea urchin fertilization and early development. MARINE POLLUTION BULLETIN 2024; 199:115980. [PMID: 38171163 DOI: 10.1016/j.marpolbul.2023.115980] [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: 08/14/2023] [Revised: 12/16/2023] [Accepted: 12/23/2023] [Indexed: 01/05/2024]
Abstract
Plastic leachates have chemical and biological implications for marine environments. This study experimentally evaluated acute effects of weathering plastic leachates (0, 25, 50, 75 and 100 %) on fertilization and early development of the sea urchin Lytechinus variegatus. Fertilization, embryonic and larval development were drastically inhibited (~75 %) when gametes were exposed to intermediate and high leachate concentrations or delayed when exposed to the lowest concentration. Fertilization and first cleavage stages were highly affected by exposure to intermediate and high leachate concentrations. None of the cells incubated at concentrations from 50 % reached blastula stage, suggesting that embryonic development was the most sensitive stage. Abnormalities in embryos and larvae were observed in all leachate treatments. Chemical analysis detected high concentration of bisphenol A, which may induce these observed effects. Our results highlight the potential threats of plastic pollution to sea urchin populations, which may severely affect the structure and functioning of coastal ecosystems.
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Affiliation(s)
- Agatha Miralha
- Graduate Program in Neotropical Biodiversity (PPGBIO), Institute of Biosciences (IBIO), Federal University of the State of Rio de Janeiro (UNIRIO), Brazil; Research Group of Experimental and Applied Aquatic Ecology, Department of Ecology and Marine Resources, Institute of Biosciences (IBIO), Federal University of the State of Rio de Janeiro (UNIRIO), Brazil
| | - Mariana Contins
- Science and Culture Forum, Federal University of Rio de Janeiro (UFRJ), Brazil
| | - Letícia B T Carpenter
- Centre of Analysis Fernanda Coutinho, State University of Rio de Janeiro (UERJ), Brazil
| | - Rafael L Pinto
- Centre of Analysis Fernanda Coutinho, State University of Rio de Janeiro (UERJ), Brazil
| | | | - Raquel A F Neves
- Graduate Program in Neotropical Biodiversity (PPGBIO), Institute of Biosciences (IBIO), Federal University of the State of Rio de Janeiro (UNIRIO), Brazil; Research Group of Experimental and Applied Aquatic Ecology, Department of Ecology and Marine Resources, Institute of Biosciences (IBIO), Federal University of the State of Rio de Janeiro (UNIRIO), Brazil.
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Santos LDD, Souza TLD, Silva GID, Mello MFFD, Oliveira JMD, Romano MA, Romano RM. Prepubertal oral exposure to relevant doses of acrylamide impairs the testicular antioxidant system in adulthood, increasing protein carbonylation and lipid peroxidation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 334:122132. [PMID: 37414124 DOI: 10.1016/j.envpol.2023.122132] [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: 05/23/2023] [Revised: 06/21/2023] [Accepted: 06/30/2023] [Indexed: 07/08/2023]
Abstract
The increased prevalence of human infertility due to male reproductive disorders has been linked to extensive exposure to chemical endocrine disruptors. Acrylamide (AA) is a compound formed spontaneously during the thermal processing of some foods that are mainly consumed by children and adolescents. We previously found that prepubertal exposure to AA causes reduced sperm production and functionality. Oxidative stress is recognized as the main cause of reduced sperm quality and quantity. In this sense, our objective was to evaluate the expression and activity of genes related to enzymatic antioxidant defense, nonprotein thiols, lipid peroxidation (LPO), protein carbonylation (PC) and DNA damage in the testes of rats exposed to acrylamide (2.5 or 5 mg/kg) from weaning to adult life by gavage. For the AA2.5 and AA5 groups, there were no alterations in the transcript expression of genes related to enzymatic antioxidant defense. The enzymatic activities and metabolic parameters were also not affected in the AA2.5 group. For the AA5 group, the enzymatic activities of G6PDH and GPX were reduced, SOD was increased, and protein carbonylation (PC) was increased. Data were also evaluated by Integrate Biomarker Response (IBRv2), a method to analyze and summarize the effects on biomarkers between doses. The IBRv2 index was calculated as 8.9 and 18.71 for AA2.5 and AA5, respectively. The following biomarkers were affected by AA2.5: decreased enzymatic activities of G6PDH, SOD, and GPX, increased GST and GSH, increased LPO and PC, and decreased DNA damage. For AA5, decreased enzymatic activities of G6PDH, GST, CAT and GPX, increased SOD and GSH, increased PC, and decreased LPO and DNA damage were observed. In conclusion, AA exposure during the prepubertal period causes imbalances in the testicular enzymatic antioxidant defense, contributing to the altered spermatic scenario in the testes of these rats.
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Affiliation(s)
- Luciana Dalazen Dos Santos
- Laboratory of Reproductive Toxicology and Molecular Biology, Department of Medicine, State University of Centro-Oeste (UNICENTRO), Alameda Élio Antonio Dalla Vecchia, 838, Zip-Code, 85040-167, Parana, Brazil
| | - Tugstênio Lima de Souza
- Laboratório de Toxicologia Celular, Departamento de Biologia Celular, Universidade Federal Do Paraná, CEP 81.531-980, Curitiba, PR, Brazil
| | - Gabriel Ian da Silva
- Laboratory of Reproductive Toxicology and Molecular Biology, Department of Medicine, State University of Centro-Oeste (UNICENTRO), Alameda Élio Antonio Dalla Vecchia, 838, Zip-Code, 85040-167, Parana, Brazil
| | - Mateus Francescon Ferreira de Mello
- Laboratory of Reproductive Toxicology and Molecular Biology, Department of Medicine, State University of Centro-Oeste (UNICENTRO), Alameda Élio Antonio Dalla Vecchia, 838, Zip-Code, 85040-167, Parana, Brazil
| | - Jeane Maria de Oliveira
- Laboratory of Reproductive Toxicology and Molecular Biology, Department of Medicine, State University of Centro-Oeste (UNICENTRO), Alameda Élio Antonio Dalla Vecchia, 838, Zip-Code, 85040-167, Parana, Brazil
| | - Marco Aurelio Romano
- Laboratory of Reproductive Toxicology and Molecular Biology, Department of Medicine, State University of Centro-Oeste (UNICENTRO), Alameda Élio Antonio Dalla Vecchia, 838, Zip-Code, 85040-167, Parana, Brazil
| | - Renata Marino Romano
- Laboratory of Reproductive Toxicology and Molecular Biology, Department of Medicine, State University of Centro-Oeste (UNICENTRO), Alameda Élio Antonio Dalla Vecchia, 838, Zip-Code, 85040-167, Parana, Brazil.
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