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Dadun > Depósito Académico > CIMA (Centro de Investigación Médica Aplicada) > Área de Oncología > Biomarcadores > DA - CIMA - Oncología - Biomarcadores - Artículos de Revista >

Malpighian tubules of Formica polyctena (Hymenoptera): light and electron microscopic study
Authors: Garayoa, M. (Mercedes)
Villaro, A.C. (Ana Cristina)
Montuenga, L.M. (Luis M.)
Sesma, M.P. (María Pilar)
Keywords: Formica polyctena
Malpighian tubules
Issue Date: 1992
Publisher: Wiley Blackwell
Publisher version:
ISSN: 1097-4687
Citation: Garayoa M, Villaro A, Montuenga L, Sesma P. Malpighian tubules of Formica polyctena (Hymenoptera): light and electron microscopic study. J Morphol 1992;214(2):159-171.
The study of semithin (1 μ in thickness) and thin sections of Epon-embedded material reveals that Malpighian tubules of Formica polyctena are composed of a single cellular type throughout their length. No differentiated regions were observed. Ultrastructural traits of the epithelial cells are those of highly metabolic cells engaged in water and ion transport: large euchromatic nucleus, several nucleoli, abundant mitochondria, a conspicuous brush border, and basolateral infoldings. Lysosomes, smooth endoplasmic reticulum, and intercellular junctions are also well developed. Mineral concretions occur within the cells and in the lumen. However, the degree of development of these cytological traits is variable among the different cells. The tubules drain into the gut through a specialized posterior region of the midgut or ampulla. In this region, the epithelial cells, although usually taller and showing conspicuous basal infoldings, display cytological structures similar to those of the Malpighian tubules.
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DA - CIMA - Oncología - Biomarcadores - Artículos de Revista

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