IHEM 20887
INSTITUTO DE HISTOLOGIA Y EMBRIOLOGIA DE MENDOZA DR. MARIO H. BURGOS
Unidad Ejecutora - UE
artículos
Título:
Urate cells and tissues in the South American apple snail Pomacea canaliculata
Autor/es:
GIRAUD-BILLOUD M; KOCH E; VEGA C I A; GAMARRA-LUQUES C; CASTRO-VAZQUEZ A
Revista:
JOURNAL OF MOLLUSCAN STUDIES
Editorial:
Oxford University Press
Referencias:
Lugar: Oxford - UK; Año: 2008 vol. 74 p. 259 - 266
ISSN:
0260-1230
Resumen:
Intracellular urate concretions are known to occur in some insects, crustaceans and gastropods.
Crystalloid-containing urate cells and tissues are widespread in many organs of the apple-snail
Pomacea canaliculata. The occurrence of three different urate tissues (perivascular, compact and
nodular) correlated well with uric acid concentrations found in the organs containing them. The
highest uric acid concentrations were found in the coiled gut (showing both perivascular and
compact tissues), the style sac (compact tissue), the testis, the midgut gland and the lung (perivascular
tissue) and the aortic ampulla (nodular tissue). Lower concentrations were found in organs with
perivascular tissue associated only with their main supplying vessels (anterior kidney and ctenidium),
while organs devoid of urate tissues had minimal concentrations (mantle skirt, posterior kidney,
albumen gland and heart). Transmission electron microscopy of urate cells revealed a process of
sequential differentiation and death, accompanied by the formation and resorption of urate crystalloids.
This process occurred asynchronously in cells within the same tissue, suggesting an active turnover
of uric acid in the organs containing them.
nodular) correlated well with uric acid concentrations found in the organs containing them. The
highest uric acid concentrations were found in the coiled gut (showing both perivascular and
compact tissues), the style sac (compact tissue), the testis, the midgut gland and the lung (perivascular
tissue) and the aortic ampulla (nodular tissue). Lower concentrations were found in organs with
perivascular tissue associated only with their main supplying vessels (anterior kidney and ctenidium),
while organs devoid of urate tissues had minimal concentrations (mantle skirt, posterior kidney,
albumen gland and heart). Transmission electron microscopy of urate cells revealed a process of
sequential differentiation and death, accompanied by the formation and resorption of urate crystalloids.
This process occurred asynchronously in cells within the same tissue, suggesting an active turnover
of uric acid in the organs containing them.
. The occurrence of three different urate tissues (perivascular, compact and
nodular) correlated well with uric acid concentrations found in the organs containing them. The
highest uric acid concentrations were found in the coiled gut (showing both perivascular and
compact tissues), the style sac (compact tissue), the testis, the midgut gland and the lung (perivascular
tissue) and the aortic ampulla (nodular tissue). Lower concentrations were found in organs with
perivascular tissue associated only with their main supplying vessels (anterior kidney and ctenidium),
while organs devoid of urate tissues had minimal concentrations (mantle skirt, posterior kidney,
albumen gland and heart). Transmission electron microscopy of urate cells revealed a process of
sequential differentiation and death, accompanied by the formation and resorption of urate crystalloids.
This process occurred asynchronously in cells within the same tissue, suggesting an active turnover
of uric acid in the organs containing them.
