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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Human intestinal Caco-2 cell line in vitro assay to evaluate the absorption of Cd, Cu, Mn and Zn from urban environmental matrices

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Boim, Alexys Giorgia Friol [1] ; Wragg, Joanna [2] ; Canniatti-Brazaca, Solange Guidolin [3] ; Alleoni, Luis Reynaldo Ferracciu [1]
Total Authors: 4
[1] Univ Sao Paulo, Luiz Queiroz Coll Agr, Dept Soil Sci, ESALQ, USP, BR-13418-900 Piracicaba, SP - Brazil
[2] Environm Sci Centre, British Geological Survey, Nicker Hill, Keyworth, Nottingham - England
[3] Dept Agri, Food Ind, Food, Nutr, ESALQ, USP, Piracicaba - Brazil
Total Affiliations: 3
Document type: Journal article
Source: ENVIRONMENTAL GEOCHEMISTRY AND HEALTH; v. 42, n. 2, p. 601-615, FEB 2020.
Web of Science Citations: 3

The Caco-2 cell line is derived from a human colon adenocarcinoma and is generally used in toxicity assays. The ingestion of soil or dust is a significant route of human exposure to potential harmful elements (PHE), and assays of bioaccessibility or bioavailability can be used to measure the potential hazard posed by exposure to toxic substances. The in vitro digestion (UBM method) and Caco-2 cell model were used to investigate the bioaccessibility and absorption by intestinal cells of the PHE in four matrices (two urban soils and two soils with lead (Pb)-mining tailings) along with the guidance material for bioaccessibility measurements, BGS 102. The gastrointestinal (GI) compartment was simulated, and the resulting material added to Caco-2 cells. In the GI, the average bioaccessibility was 24% for cadmium (Cd), 17% for copper (Cu), 0.2% for Pb, 44% for manganese (Mn) and 6% for zinc (Zn). The poor reproducibility was attributed to the pH (6.3) and the highly complex GI fluid that formed PHE precipitates and complexes. In 2 h, Caco-2 cells absorbed 0.2 ng mg(-1) of cellular protein for Cd, 13.4 ng mg(-1) for Cu, 5 ng mg(-1) for Mn and 31.7 mu g mg(-1) for Zn. Lead absorption was lower than the limit of quantification (< 2 mu g L-1). Cd was presented in the cell monolayer and could interfere in the intracellular accumulation of Cu, Mn and Zn. The use of in vitro assays allowed for an estimation of the absorption of Cd, Cu, Mn and Zn from environmental matrices to be made, and except for Mn, it had a positive correlation with bioaccessible concentration, suggesting a common association of these elements in the cellular environment. (AU)

FAPESP's process: 15/19332-9 - Oral and respiratory bioacessibility of potentially toxic elements in urban soils and sediments
Grantee:Alexys Giorgia Friol Boim
Support Opportunities: Scholarships in Brazil - Doctorate