Nucleotidase activities in membrane preparations of nervous ganglia and digestive gland of the snail Helix aspersa

Borges, Eliane; Cognato, Giana de Paula; Vuaden, Fernanda Cenci; Bogo, Maurı́cio Reis; Fauth, Maria da Graça; Bonan, Carla Denise; Dias, Renato Dutra

doi:10.1016/j.cbpc.2003.11.012

Cited by 5 publications

(1 citation statement)

References 39 publications

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“…A unique Ca 2+ ‐activated ATPase has been identified on the nervous ganglia of the terrestrial slug Phyllocaulis soleiformis (Da Silva et al. 2002) and nucleotidase activities in membrane preparations of ganglia and digestive gland of the snail H. aspersa have been described (Borges et al. 2004).…”

Section: Invertebratesmentioning

confidence: 99%

Evolutionary origins of the purinergic signalling system

2009

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Purines appear to be the most primitive and widespread chemical messengers in the animal and plant kingdoms. The evidence for purinergic signalling in plants, invertebrates and lower vertebrates is reviewed. Much is based on pharmacological studies, but important recent studies have utilized the techniques of molecular biology and receptors have been cloned and characterized in primitive invertebrates, including the social amoeba Dictyostelium and the platyhelminth Schistosoma, as well as the green algae Ostreococcus, which resemble P2X receptors identified in mammals. This suggests that contrary to earlier speculations, P2X ion channel receptors appeared early in evolution, while G protein-coupled P1 and P2Y receptors were introduced either at the same time or perhaps even later. The absence of gene coding for P2X receptors in some animal groups [e.g. in some insects, roundworms (Caenorhabditis elegans) and the plant Arabidopsis] in contrast to the potent pharmacological actions of nucleotides in the same species, suggests that novel receptors are still to be discovered.

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Section: Invertebratesmentioning

confidence: 99%

Evolutionary origins of the purinergic signalling system

2009

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Effects of starvation on haemolymphatic glucose levels, glycogen contents and nucleotidase activities in different tissues of Helix aspersa (Müller, 1774) (mollusca, gastropoda)

et al. 2004

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In the present study, the glucose concentration in the haemolymph and glycogen levels were determined in the various body parts of the Helix aspersa snail after feeding lettuce ad libitum and after various periods of starvation. To characterize the effect of starvation on nucleotidase activity, enzyme assays were performed on membranes of the nervous ganglia and digestive gland. Results demonstrated the maintenance of the haemolymph glucose concentration for up to 30 days of starvation, probably due to the consumption of glycogen from the mantle. In the nervous ganglia, depletion of glycogen occurs progressively during the different periods of starvation. No significant changes were observed on ATP and ADP hydrolysis in the membranes of nervous ganglia and no alterations in Ca2+ -ATPase and Mg2+ -ATPase occurred in the membranes of the digestive gland of H. aspersa during the different periods of starvation. Although there were no changes in the enzyme activities during starvation, they could be modulated by effectors in situ with concomitant changes in products/reactants during starvation.

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Evolution of Purinergic Signalling

Burnstock

Verkhratsky

2012

Purinergic Signalling and the Nervous System

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Nucleotidase activities in membrane preparations of nervous ganglia and digestive gland of the snail Helix aspersa

Cited by 5 publications

References 39 publications

Evolutionary origins of the purinergic signalling system

Evolutionary origins of the purinergic signalling system

Effects of starvation on haemolymphatic glucose levels, glycogen contents and nucleotidase activities in different tissues of Helix aspersa (Müller, 1774) (mollusca, gastropoda)

Evolution of Purinergic Signalling

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