A systematic review on toxicity assessment of persistent emerging pollutants (EPs) and associated microplastics (MPs) in the environment using the Hydra animal model

Vimalkumar, Krishnamoorthi; Seethappan, Sangeetha; Oscar, Felix Lewis; Kay, Paul

doi:10.1016/j.cbpc.2022.109320

Cited by 11 publications

(4 citation statements)

References 104 publications

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“…Additionally, some hydras are more sensitive to toxic chemicals because of their algicidal and anti-zoochlorellae activities when microalgae are present as endosymbiotic microbiome organisms. Hence, metal toxicity varies between symbiotic and aposymbiotic hydra species: symbiotic hydra species may tolerate a lower metal concentration (e.g., Cu), with the endosymbiotic algae being able to sequester Cu at lower concentrations, which reduces the degree of toxicity and effects on the polyps [34,60].…”

Section: Discussionmentioning

confidence: 99%

“…We propose hydra for the inexpensive and rapid in vivo and in vitro monitoring of the impact of devastating environmental pollutants. On one hand, its extreme sensitivity to minute concentrations of various types of toxic substances (from heavy metals, pharmaceuticals, and nanomaterials to microplastics) [34,53,60,65], and, on the other hand, its high survival rate even when interstitial stem cells are eliminated [66,67], makes hydra an efficient multifunctional biosensor for numerous aquatic ecosystems.…”

Section: Discussionmentioning

confidence: 99%

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Ecotoxicological Effects of Sodium Metasilicate on Two Hydra Species, Hydra viridissima Pallas, 1766 and Hydra oligactis Pallas, 1766

Kovačević,

Gračan,

Gottstein

2023

Water

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Sodium metasilicate (SM) is a synthetic hazardous water-soluble salt used in industry as an active ingredient in household cleaning products. The impact of SM on the aquatic environment has been discussed worldwide, but its toxicity has not been well documented and researched. Studies have only been performed on a handful of aquatic organisms: algae, plants, blackworms, water fleas, dipteran larvae, and two fish species. Hydra is a simple freshwater cnidarian with diploblastic organisation, where all the cells are in permanent contact with the surrounding aqueous media, and represents a sensitive model organism for environmental toxicity assessments. This research aimed to determine and compare the effect of SM on the morphology, excitability, and behaviour of green and brown hydra and endosymbiotic microalgae as a microbiome of green hydra. The hydras were treated with four sublethal SM concentrations (0.050, 0.365, 0.380, and 0.390 g/L) for 72 h. Standard preparations were made for the cyto-histological analysis of green hydra, and damaged cellular layers and mesoglea and a changed distribution of microalgae were recorded. The SM caused muted responses to mechanical stimuli and damage to the tentacles in both hydra species. The changes were more pronounced in brown hydra, while green hydra showed better adaptability to unfavourable environmental conditions.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Ecotoxicological Effects of Sodium Metasilicate on Two Hydra Species, Hydra viridissima Pallas, 1766 and Hydra oligactis Pallas, 1766

Kovačević,

Gračan,

Gottstein

2023

Water

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“…Microplastics (MPs) are an emerging pollutant, receiving increasing attention in recent years ( Santillo, Miller & Johnston, 2017 ; Luo et al, 2022 ; Krishnamoorthi et al, 2022 ). It is estimated that annually 4 to 23 times more plastic is released into the terrestrial environment than the marine environment ( Horton et al, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Accumulation and transfer of polystyrene microplastics in Solanum nigrum seedlings

Zhang,

Cao,

Zhu

et al. 2023

PeerJ

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Microplastic (MP) pollution is lately receiving increasing attention owing to its harmful impact on terrestrial ecosystems. In this microcosm study, we assessed the uptake and transfer of MPs in Solanum nigrum seedlings exposed to 50 mg L–1 of 0.2-µm polystyrene (PS) beads for 30 d. Confocal laser scanning micrographs helped detect highly intense red fluorescence signals from PS-MP beads in S. nigrum root compared with the controls. Confocal images revealed that the PS beads were primarily distributed in the epidermis and xylem of roots and vascular systems of stems and leaves. Scanning electron microscopy showed that PS beads were scattered on the cell walls of the root xylem and leaf vascular system. Few PS beads were transferred from roots to stems and leaves via the vascular system following the transpiration stream. In conclusion, our findings showed that PS beads accumulated in S. nigrum roots and were transferred from the roots to the aerial parts.

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“…Hydra sp. has been recently promoted as a suitable model for ecological risk assessment of legacy and contaminants of emerging concerns (CECs), including engineered nanomaterials (ENMs) [11,12].…”

Section: Introductionmentioning

confidence: 99%

Sensitivity of Hydra vulgaris to Nanosilver for Environmental Applications

Bellingeri

Battocchio

Faleri

et al. 2022

Toxics

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Nanosilver applications, including sensing and water treatment, have significantly increased in recent years, although safety for humans and the environment is still under debate. Here, we tested the environmental safety of a novel formulation of silver nanoparticles functionalized with citrate and L-cysteine (AgNPcitLcys) on freshwater cnidarian Hydra vulgaris as an emerging ecotoxicological model for the safety of engineered nanomaterials. AgNPcitLcys behavior was characterized by dynamic light scattering (DLS), while Ag release was measured by inductively coupled plasma mass spectrometry (ICP-MS). H. vulgaris (n = 12) subjects were evaluated for morphological aberration after 96 h of exposure and regeneration ability after 96 h and 7 days of exposure, after which the predatory ability was also assessed. The results show a low dissolution of AgNPcitLcys in Hydra medium (max 0.146% of nominal AgNPcitLcys concentration) and highlight a lack of ecotoxicological effects, both on morphology and regeneration, confirming the protective role of the double coating against AgNP biological effects. Predatory ability evaluation suggests a mild impairment of the entangling capacity or of the functionality of the tentacles, as the number of preys killed but not ingested was higher than the controls in all exposed animals. While their long-term sub-lethal effects still need to be further evaluated on H. vulgaris, AgNPcitLcys appears to be a promising tool for environmental applications, for instance, for water treatment and sensing.

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A systematic review on toxicity assessment of persistent emerging pollutants (EPs) and associated microplastics (MPs) in the environment using the Hydra animal model

Cited by 11 publications

References 104 publications

Ecotoxicological Effects of Sodium Metasilicate on Two Hydra Species, Hydra viridissima Pallas, 1766 and Hydra oligactis Pallas, 1766

Ecotoxicological Effects of Sodium Metasilicate on Two Hydra Species, Hydra viridissima Pallas, 1766 and Hydra oligactis Pallas, 1766

Accumulation and transfer of polystyrene microplastics in Solanum nigrum seedlings

Sensitivity of Hydra vulgaris to Nanosilver for Environmental Applications

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