Comparative Biochemistry and Physiology Part A: Physiology
General paperAlterations in the digestive gland and shell of the snail Helix aspersa Müller (gastropoda, pulmonata) after prolonged starvation
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Differential response to Cadmium exposure by expression of a two and a three-domain metallothionein isoform in the land winkle Pomatias elegans: Valuating the marine heritage of a land snail
2019, Science of the Total EnvironmentCitation Excerpt :Hence, it is comprehensible that the midgut gland shares a homologous morphology among all gastropod species, consisting of mainly two or three cell types (digestive cells, excretory cells and calcium cells) which form an epithelium that delimits the lumen of digestive tubuli (Sumner, 1965). Overall, the midgut gland cells are characterized by their huge adaptive plasticity (Triebskorn and Köhler, 1992; Marigómez et al., 1993; Porcel et al., 1996; Lobo-da-Cunha, 1999; Taïeb and Vicente, 1999). In response to environmental stimuli, the midgut gland tissue of gastropods can thus shortly change its structure (Cajaraville et al., 1990; Benito et al., 2017).
Effects of dietary Pb and Cd and their combination on lysosomal and tissue-level biomarkers and histopathology in digestive gland of the land snail, Cantareus apertus (Born, 1778)
2018, Ecotoxicology and Environmental SafetyCitation Excerpt :Moreover, dietary exposure to 100 mg Pb/kg food dry-wt caused severe breakdown of digestive cells and enhancement of apocrine secretion, whilst exposure to 2500 mg Pb/kg caused severe atrophy of the digestive acini. In general terms, digestive cell breakdown and loss seem to be a general response after metal exposure (Porcel et al., 1996; Chabicovsky et al., 2004; Manzl et al., 2004; Zaldibar et al., 2007b). Nevertheless, the most severe damage, including exacerbated apocrine secretion from digestive cells, was exerted since the first week of treatment by high doses of the metals in combination (2500 mg Pb/kg + 100 mg Cd/kg), which led after 8 wk treatment to extreme alterations in the three epithelial cell types.
Complex species interaction in tropical backreef communities
2010, Journal of Experimental Marine Biology and EcologyCitation Excerpt :While these results could be related as a function of perceived susceptibility, the data indicate that the trend may instead be driven by stagnant or decreasing thickness in exposed snails and normal growth in controls. A comparable occurrence was observed by Porcel et al. (1996), who noted body mass loss and shell thinning in starved land snails. However, lip thinning is somewhat unexpected in marine snails that are consumed by shell crushing predators.
Changes in cell-type composition in digestive gland of slugs and its influence in biomarkers following transplantation between a relatively unpolluted and a chronically metal-polluted site
2008, Environmental PollutionCitation Excerpt :Accordingly, high relative numbers of excretory and calcium cells were found in slugs inhabiting an abandoned Cu mine for various generations (chronic pollution), where digestive cells were active in excretion of cytoplasmic granules and highly vacuolated (Marigómez et al., 1998), which might again be simply explained by a permanent release of digestive cells. Likewise, it has been proposed that excretory cells are digestive cells in a final step in their cell cycle, rather than a distinct cell type (Porcel et al., 1996; Dimitriadis and Konstantinidou, 2002), which might explain why the proportions of digestive and excretory cells follow opposite directions after food deprivation or pollutant exposure (Porcel et al., 1996; Marigómez et al., 1998; Dimitriadis and Konstantinidou, 2002). Moreover, the augmented relative presence of basophilic cells seems to be mainly attributed to hypertrophy rather than to increased numbers (Marigómez et al., 1996; Chabicovsky et al., 2004).
Influence of temperature acclimation and gut content on the supercooling ability of the land snail Cornu aspersum
2008, Comparative Biochemistry and Physiology - A Molecular and Integrative Physiology