Structure and permeability of the septate junction in the kidney sac of Helix pomatia L.

Newell, P. F.; Skelding, J. M.

doi:10.1007/bf00306598

Cited by 37 publications

(7 citation statements)

References 18 publications

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“…Light microscopic analysis in the present study of the kidney of E. vermiculata showed similarity to some extent to that described for other molluscs as Agriolimax reticulates (Runham and Hunter, 1971); Helix pomatia (Newell and Skelding, 1973); Littorina littrea and Planorbarius corneus (Klobučar et al, 2001). Molluscan kidney consists of a tubule enclosing a luminal cavity derived from the coelom.…”

Section: (A) a Continuous Epithelium Of Columnar Cells The Nephrocytsupporting

confidence: 85%

Histopathological Changes Induced by Metaldehyde in Eobania vermiculata (Müller 1774)

2011

Alexandria Science Exchange Journal: An International Quarterly

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Metaldehyde is a specific molluscicide for terrestrial snails and slugs. Histopathological changes induced by metaldehyde in the terrestrial snail E. vermiculata were investigated by light microscopy in order to study its cellular toxicity. Alterations in digestive gland included cellular infiltration, destruction of intertubular connective tissue, and extensive vacuolation in the cytoplasm of digestive cells. Degeneration and necrosis in the lining epithelium of the digestive tubules were also noticed. Irregular thickening in the outer covering muscular layer, thinning of basal layer, atrophy and degeneration of mucous cells were the most observed changes in dart gland. The histological alterations in the kidney were degeneration of nephrocytes, and an increase in the number and size of concretions in nephrocytes. Metaldehyde showed cytotoxic effects in all tested organs, that in turn leads to failure of the digestive, reproductive and excretory systems.

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Section: (A) a Continuous Epithelium Of Columnar Cells The Nephrocytsupporting

confidence: 85%

Histopathological Changes Induced by Metaldehyde in Eobania vermiculata (Müller 1774)

2011

Alexandria Science Exchange Journal: An International Quarterly

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“…A role as a filter has been proposed on speculative ground for the substructure of the basement membrane in the gut of Aedes and in Sepia branchial heart (Terzakis 1967, Schipp 1977. This function has been confirmed for the basement membrane of the kidney sac of Helix pomatia (Newell and Skelding 1973) , and for that of the ovotestis of Agriolimax reticulatus (Hill 1977). The last one shows a substructural pattern like that of the kidney sac of Arion.…”

Section: Discussionmentioning

confidence: 94%

A basement membrane substructured in the kidney sac of arionid slugs (Mollusca:Pulmonata).

Angulo

Moya

1986

CYTOLOGIA

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“…The fate of tracers has not been followed in Helisomo, but pinocytotic vesicles containing horseradish peroxidase or carbon particles have been observed in the epithelial cells of the kidney sac. Horseradish peroxidase was found to be blocked by septate desmosomes in Helix pomutia (Newell and Skelding 1973).…”

Section: In Vitro Studiesmentioning

confidence: 98%

“…In Helix pomatia (Verwohl 1961) and Achatina fulica (Martin et al 1965), the kidney sac was suggested to be the site of ultrafiltration. Skelding (1973) and Newell and Skelding (1973) demonstrated filtration barriers in the kidney sac of Achatina achatina and Helix pomatia, respectively. Potts (1967) suggested that ultrafiltration in pulmonates may occur directly from the blood into the kidney sac.…”

Section: Introductionmentioning

confidence: 98%

Effects of osmotic changes and neurosecretory extracts on kidney ultrastructure in the freshwater pulmonate Helisoma

Khan¹,

Saleuddin²

1979

Can. J. Zool.

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The ultrastructure of the heart and kidney, and the effects of media of different osmotic concentrations and of nervous tissue extracts, have been investigated in Helisoma duryi and H. trivolvis. The auricle and ventricle walls do not appear to be possible sites for urine formation. In the kidney sac, ferritin and carbon particles are retained by the basement membrane of the epithelium, whereas horseradish peroxidase passes through the basement membrane into the intercellular spaces 10 min after injection. Epithelial cells have deep basal membrane infoldings. Intercellular spaces and spaces in the infoldings are wide in snails kept in distilled water but narrow in snails kept in isosmotic saline. When kidney sacs from saline-acclimated snails were treated in vitro with visceral ganglion extract from snails kept in distilled water these spaces rapidly expanded. Visceral ganglion extract from snails kept in saline, or extracts of other ganglia, had no effect. It is suggested that urine formation occurs in the kidney sac, and that a factor (probably neurosecretory) from the visceral ganglion may act on kidney sac epithelium to alter the rate of filtration and fluid (prourine) transport.

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Structure and permeability of the septate junction in the kidney sac of Helix pomatia L.

Cited by 37 publications

References 18 publications

Histopathological Changes Induced by Metaldehyde in Eobania vermiculata (Müller 1774)

Histopathological Changes Induced by Metaldehyde in Eobania vermiculata (Müller 1774)

A basement membrane substructured in the kidney sac of arionid slugs (Mollusca:Pulmonata).

Effects of osmotic changes and neurosecretory extracts on kidney ultrastructure in the freshwater pulmonate Helisoma

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