Dynamics of non-specific esterase during fat resorption in the jejunum of the house mouse, Mus musculus

Böcking, Alfred; O, von Deimling

doi:10.1007/bf00496740

Cited by 10 publications

(1 citation statement)

References 17 publications

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“…Thus, it can be postulated that each segment plays a specific role. The variations in the level of activity in the histologically identical principal cells of segment IV are probably the expression of different functional states, as shown in other tissues by biochemical and cytochemical determinations (Feustel et al, 1970;Bocking and Deimling, 1982).…”

Section: Discussionmentioning

confidence: 97%

Subcellular distribution of the nonspecific esterase in the mouse epididymis with special reference to regional differences

Abou‐Haïla¹

1986

Anat. Rec.

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The subcellular distribution of esterases was studied in mouse epididymis by using 5-bromo-indoxyl-acetate as a substrate. In all the cells of the duct, a low level of esterase activity was detected except in one of the five segments of the head--segment IV; in one of the three types of apical cells--the "prominent cells"; and in the "clear cells" scattered in the middle and distal parts. In these cells, the intensity of the reaction was high. The reaction product was consistently found in the endoplasmic reticulum and was more abundant in cells showing a high level of activity than in others. In cells with low esterase activity, the reaction was mainly restricted to this organelle. In highly active cells, the spectrum of subcellular locations was selectively enlarged and esterase was demonstrated in almost all cell compartments, including the cell membrane, nuclear envelope, mitochondria, lytic structures, and, more rarely in the Golgi apparatus or microvilli. These locations were dependent on cell type. A weak enzyme activity also appeared on mature spermatozoa.

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Section: Discussionmentioning

confidence: 97%

Subcellular distribution of the nonspecific esterase in the mouse epididymis with special reference to regional differences

Abou‐Haïla¹

1986

Anat. Rec.

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Fat distribution in the skin of bottlenose dolphins (Tursiops truncatus and Tursiops gilli)

Stromberg

1985

Journal of Morphology

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Frozen sections stained with Oil-red-O and semithin (0.5 μm) plastic sections stained with toluidine blue revealed an abundance of fat globules of various sizes in all strata of the epidermis of bottlenose dolphins (Tursiops truncatus and T. gilli). The fat was rather evenly distributed but sometimes appeared as circumscribed areas of heavier concentration involving hundreds of cells (as seen in a single plane). Occasionally, there were smaller groups of epidermal cells heavily loaded with lipid. The dermis presented a unique phenomenon in the presence of abundant extracellular fat distributed among the collagen bundles as droplets of various sizes or as larger, irregularly shaped lipid particles that seemed to conform to the spaces between collagen bundles. These lipid particles were sometimes seen to be closely applied to the dermal surface of the stratum basale. Equally unusual was the presence of lipid particles of various sizes and shapes in the lumen of some of the vessels of the dermal papillae. Granular cells resembling mast cells were commonly seen in the papillary dermis and some were closely associated with lipid particles. Blood vessels of the reticular dermis tended to have collections of lipid droplets in the loose connective tissue often found adjacent to the tunica adventitia. It is postulated that the extracellular dermal lipids (probably mainly triglycerides) are broken down to free fatty acids that diffuse into the basal layer of the epidermis and are there resynthesized into triglycerides. Possible uses for the epidermal lipids are discussed.

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The non-specific esterases of mouse lung

1983

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The non-specific esterases of the lung of the house mouse, M. musculus, were examined by polyacrylamide electrophoresis and by isoelectric focusing. At least 13 different esterases were distinguished and identified, mainly by their catalytic properties, susceptibility to inhibition, developmental patterns and phenotypic variation amongst different strains. A list of diagnostic features of the 13 esterases was presented. None of the esterases was lung-specific. However, the pattern of esterases found in the adult lung was characteristic of that organ. It was pointed out that this pattern is associated with the high degree of tissue differentiation in the adult lung. At least 8 esterases were found which belong to the isozyme system of carboxylesterase EC 3.1.1.1, under the control of genes located on chromosome 8. These esterases accounted for about 90% of the esterase activity in the lung.

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Dynamics of non-specific esterase during fat resorption in the jejunum of the house mouse, Mus musculus

Cited by 10 publications

References 17 publications

Subcellular distribution of the nonspecific esterase in the mouse epididymis with special reference to regional differences

Subcellular distribution of the nonspecific esterase in the mouse epididymis with special reference to regional differences

Fat distribution in the skin of bottlenose dolphins (Tursiops truncatus and Tursiops gilli)

The non-specific esterases of mouse lung

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