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Toxicokinetics of copper and cadmium in the soil model Enchytraeus crypticus (Oligochaeta).
Chemosphere. 2021 May; 270:129433.C

Abstract

Toxicokinetics information is key to understanding the underlying intoxication processes, although this is often lacking. Hence, in the present study the toxicokinetics of copper (Cu) and cadmium (Cd) was assessed in the soil invertebrate Enchytraeus crypticus. The animals were exposed in LUFA 2.2 natural soil spiked to the estimated EC20 for reproduction effects in the Enchytraeid Reproduction Test (ERT), i.e. 80 mg Cu/kg soil Dry Weight (DW) and 20 mg Cd/kg soil DW. Tests followed the OECD guideline 317, including a 14-day uptake phase in spiked soil followed by 14 days elimination in clean soil, with samplings at days 0, 1, 2, 4, 7, 10, and 14. Exposure to Cu showed fast uptake, reaching a steady state after approx. 7 days, whereas for Cd, internal concentration increased and did not reach a clear steady state even after 14 days. When transferred to clean soil, Cu was rapidly eliminated returning to initial levels, while Cd-exposed animals still contained increased residue levels after 14 days. These differences in toxicokinetics have consequences for the toxicity and toxicodynamics and are indicative of the way essential and non-essential elements are handled by enchytraeids, likely also other soil invertebrates. This argues for the relevancy of longer exposure testing for elements like Cd compared to Cu, where phenotypical effects can well occur later at non-tested periods, e.g. after the 21 days' duration of the standard ERT using E. crypticus.

Authors+Show Affiliations

Department of Biology & CESAM, University of Aveiro, 3810-193, Aveiro, Portugal.Department of Ecological Science. Faculty of Science, Vrije Universiteit Amsterdam De Boelelaan 1085, 1081, HV Amsterdam, the Netherlands.Department of Biology & CESAM, University of Aveiro, 3810-193, Aveiro, Portugal. Electronic address: mjamorim@ua.pt.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

33401072

Citation

Santos, Fátima C F., et al. "Toxicokinetics of Copper and Cadmium in the Soil Model Enchytraeus Crypticus (Oligochaeta)." Chemosphere, vol. 270, 2021, p. 129433.
Santos FCF, van Gestel CAM, Amorim MJB. Toxicokinetics of copper and cadmium in the soil model Enchytraeus crypticus (Oligochaeta). Chemosphere. 2021;270:129433.
Santos, F. C. F., van Gestel, C. A. M., & Amorim, M. J. B. (2021). Toxicokinetics of copper and cadmium in the soil model Enchytraeus crypticus (Oligochaeta). Chemosphere, 270, 129433. https://doi.org/10.1016/j.chemosphere.2020.129433
Santos FCF, van Gestel CAM, Amorim MJB. Toxicokinetics of Copper and Cadmium in the Soil Model Enchytraeus Crypticus (Oligochaeta). Chemosphere. 2021;270:129433. PubMed PMID: 33401072.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Toxicokinetics of copper and cadmium in the soil model Enchytraeus crypticus (Oligochaeta). AU - Santos,Fátima C F, AU - van Gestel,Cornelis A M, AU - Amorim,Mónica J B, Y1 - 2020/12/26/ PY - 2020/09/30/received PY - 2020/12/18/revised PY - 2020/12/21/accepted PY - 2021/1/6/pubmed PY - 2021/3/11/medline PY - 2021/1/5/entrez KW - Bioaccumulation KW - Elimination KW - Enchytraeids KW - Kinetics KW - Toxicodynamics KW - Uptake SP - 129433 EP - 129433 JF - Chemosphere JO - Chemosphere VL - 270 N2 - Toxicokinetics information is key to understanding the underlying intoxication processes, although this is often lacking. Hence, in the present study the toxicokinetics of copper (Cu) and cadmium (Cd) was assessed in the soil invertebrate Enchytraeus crypticus. The animals were exposed in LUFA 2.2 natural soil spiked to the estimated EC20 for reproduction effects in the Enchytraeid Reproduction Test (ERT), i.e. 80 mg Cu/kg soil Dry Weight (DW) and 20 mg Cd/kg soil DW. Tests followed the OECD guideline 317, including a 14-day uptake phase in spiked soil followed by 14 days elimination in clean soil, with samplings at days 0, 1, 2, 4, 7, 10, and 14. Exposure to Cu showed fast uptake, reaching a steady state after approx. 7 days, whereas for Cd, internal concentration increased and did not reach a clear steady state even after 14 days. When transferred to clean soil, Cu was rapidly eliminated returning to initial levels, while Cd-exposed animals still contained increased residue levels after 14 days. These differences in toxicokinetics have consequences for the toxicity and toxicodynamics and are indicative of the way essential and non-essential elements are handled by enchytraeids, likely also other soil invertebrates. This argues for the relevancy of longer exposure testing for elements like Cd compared to Cu, where phenotypical effects can well occur later at non-tested periods, e.g. after the 21 days' duration of the standard ERT using E. crypticus. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/33401072/Toxicokinetics_of_copper_and_cadmium_in_the_soil_model_Enchytraeus_crypticus__Oligochaeta__ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(20)33631-6 DB - PRIME DP - Unbound Medicine ER -