The effects of 2 μM Hg++ on the ethogram of Euplotes vannus (Ciliata, Hypotrichida)*
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Cited by (22)
Comparative evaluation of genotoxicity induced by nitrofurazone in two ciliated protozoa by detecting DNA strand breaks and DNA-protein crosslinks
2015, Ecological IndicatorsCitation Excerpt :The model organisms chosen in this present study, Euplotes vannus and Pseudokeronopsis rubra, are common species in marine aquatic environments but with different morphological features, phylogenetic position, behaviours (Chen et al., 2011; Hu and Song, 2001; Yi et al., 2008), and niche (Esteban and Finlay, 2007; Gong et al., 2005; Li et al., 2011; Xu et al., 2011). Compared to E. vannus, very little information has been reported in relation to the ecotoxicological effects on P. rubra (Li et al., 2014; Ricci et al., 1997; Slabbing et al., 1990; Zhou et al., 2011). When considering organism-specific factors, therefore, the question that arises is whether the experimental data obtained from E. vannus is applicable to P. rubra?
Acute effects of heavy metals on the expression of glutathione-related antioxidant genes in the marine ciliate Euplotes crassus
2014, Marine Pollution BulletinCitation Excerpt :Despite their importance at the ecological level and their value as a eukaryotic model system, studies on the effects of heavy metals on ciliated protozoa are relatively rare compared to the studies on other eukaryotic microorganisms. To date, studies on the toxicity of heavy metals in ciliates have mainly focused on accumulation and resistance (Rehman et al., 2009), acute effects such as cell growth and viability (Madoni et al., 1992, 1994; Gilron and Lynn, 1998; Díaz et al., 2006; Madoni and Romeo, 2006), cellular structure (Piccinni et al., 1987; Nilsson, 1997; Martín-González et al., 2005), and cell activities (Ricci et al., 1997; Coppellotti, 1998; Trielli et al., 2007) in freshwater ciliates. At the molecular level, induction of metallothionein in response to heavy metals is only well-documented in freshwater ciliates (Díaz et al., 2007; Guo et al., 2008; Shuja and Shakoori, 2009).
The use of protozoa in ecotoxicology: Application of multiple endpoint tests of the ciliate E. crassus for the evaluation of sediment quality in coastal marine ecosystems
2013, Science of the Total EnvironmentCitation Excerpt :In a recent study, ciliate cells treated with 0.3 μg/mL of Cu and 20 ng/mL of benzo(a)pyrene exhibited significantly inhibited replication rates (Gomiero et al., 2012). Moreover, Coppellotti (1998), Fleury and Fryd-Versavel (1981), Al-Rasheid and Sleigh (1994), Roberts and Berk (2006) and Nilsson (1979, 1981, 1989) noted that exposure to both heavy metals and organic pollutants can increase the stimulation of endocytosis in E. vannus and Tetrahymena pyriformis, causing a subsequent inhibition of cellular digestion due to the coalescence of food vacuoles and the elevation of the cellular pH. Moreover, it has been reported that the occurrence of environmentally relevant concentrations of heavy metals can have pronounced effects on the behaviour of Euplotes spp., mainly inducing a decrease in the organism's creeping velocity (Mori et al., 2003; Ricci et al., 1997). A possible explanation for this finding might be a metal-driven disruption of the membrane potential.
The use of multiple endpoints to assess cellular responses to environmental contaminants in the interstitial marine ciliate Euplotes crassus
2012, Aquatic ToxicologyCitation Excerpt :The absence of a cell wall allows protists to respond quickly to environmental stimuli. Studies performed on ciliates (Ricci, 1995; Ricci et al., 1997) led to considering their behavior as one of the most interesting expressions of the adaptive response to environmental stress, capable of revealing alterations at higher, like population or community, levels. Hence, the potential of protists as a predictive tool for hazard and risk assessment in the water and sediments quality criteria of estuarine and coastal environments has been evaluated by performing toxicity tests under strictly controlled laboratory conditions.
Heavy metals generate reactive oxygen species in terrestrial and aquatic ciliated protozoa
2009, Comparative Biochemistry and Physiology - C Toxicology and Pharmacology
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The research was supported by grants from MURST, CRU (Vigoni Program), CNR, Deutsche Forschungsgemeinschaft, SFB 171/C7.