In vitro and In vivo toxicity analysis of zinc selenium/zinc sulfide (ZnSe/ ZnS) quantum dots

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dc.contributor.authorReshma, VG
dc.contributor.authorSabareeswaran, A
dc.contributor.authorRajeev, KS
dc.contributor.authorMohanan, PV
dc.date.accessioned2020-12-08T08:40:33Z
dc.date.available2020-12-08T08:40:33Z
dc.date.issued2020-11
dc.description.abstractDespite the versatility of quantum dots (QDs) in optoelectronics and biomedical field, their toxicity risks remain a considerable hindrance for clinical applications. Cytotoxicity of Cadmium containing QDs is well documented and reveals that they are toxic to cells. Reports suggest that the presence of toxic elements at the QD core (e.g., cadmium, selenium) is responsible for its toxicity in in vivo and in vitro levels. Hence, here the toxicity of heavy metal free ZnSe/ZnS QDs on two scenarios were assessed, (i) HEK cells as in vitro system and (ii) Swiss Albino mice as in vivo model. Before toxicity analysis, QDs subjected to various optical and physico-chemical characterization methods such as absorption and emission spectra analysis, observation under U.V light, TEM, DLS, Zeta potential, FTIR, Raman and XPS spectra, ICP-OES, TGA and DTG curve. It is very necessary to characterize the synthesized QDs because their toxicity greatly influenced by the physico-chemical properties. On checking the vulnerability of HEK cells on exposure to ZnSe/ZnS QDs, the obtained results disclose that ZnSe/ZnS QDs showed merest impact on cellular viability at a concentration less than 100 μg/ml. Acute toxicity of 10 mg/kg ZnSe/ZnS QDs was studied in mice and no clinical or behavioural changes were observed. It did not induce any changes in haematological parameters and any loss of body or organ weight. Moderate pathological changes were evident only in the liver, all others organs like kidney, spleen and brain did not show any manifestations of toxicity. Current work lays substantial bedrock for safe biomedical and environmental application of ZnSe/ZnS QDs in near future.en_US
dc.identifier.citationReshma VG, Sabareeswaran A, Rajeev KS, Mohanan PV. In vitro and In vivo toxicity analysis of zinc selenium/zinc sulfide (ZnSe/ ZnS) quantum dots. Food and Chemical Toxicology. 2020 Nov; 145, 111718en_US
dc.identifier.urihttps://doi.org/10.1016/j.fct.2020.111718
dc.identifier.urihttps://dspace.sctimst.ac.in/handle/123456789/11009
dc.publisherFood and Chemical Toxicologyen_US
dc.subjectQuantum dotsSafety and toxicityApoptosisFlow cytometryLysosomal integrityen_US
dc.titleIn vitro and In vivo toxicity analysis of zinc selenium/zinc sulfide (ZnSe/ ZnS) quantum dotsen_US
dc.typeArticleen_US
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