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  • 1
    Electronic Resource
    Electronic Resource
    Odontoclastic resorption of the superficial nonmineralized layer of predentine in the shedding of human deciduous teeth (1994)
    Springer
    Cell & tissue research 277 (1994), S. 19-26 
    Details
    ISSN: 1432-0878
    Keywords: Odontoclasts ; Resorption ; Predentine ; Ultrastructure ; Histochemistry ; TR-ACPase (tartrateresistant acid phosphatase) ; Deciduous teeth ; Shedding ; Human
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Resorption by odontoclasts of a superficial nonmineralized layer of predentine that occurs in prior to the shedding of human deciduous teeth was studied by light and electron microscopy. As resorption of the tooth roots neared completion, multinucleate cells appeared on the predentine surface of the coronal dentine between the degenerated odontoblasts, excavated characteristic resorption lacunae in the nonmineralized predentine. These multinucleate cells had the same ultrastructural characteristics as odontoclasts and histochemical demonstration of tartrate-resistant acid phosphatase activity in the multinucleate cells revealed intense staining in numerous small granules identified as lysosomes. Occasionally, the multinucleate cells simultaneously resorbed both nonmineralized and calcospherite-mineralized matrix in the predentine. The study demonstrates that multinucleate odontoclasts can resorb nonmineralized predentine matrix in vivo, probably in the same way as they resorb demineralized organic matrix in the resorption zone underlying their ruffled border.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00303076
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Odontoclastic resorption of the superficial nonmineralized layer of predentine in the shedding of human deciduous teeth (1994)
    Springer
    Cell & tissue research 277 (1994), S. 19-26 
    Details
    ISSN: 1432-0878
    Keywords: Key words: Odontoclasts – Resorption – Predentine – Ultrastructure – Histochemistry – TR-ACPase (tartrate-resistant acid phosphatase) – Deciduous teeth – Shedding – Human
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. Resorption by odontoclasts of a superficial nonmineralized layer of predentine that occurs in prior to the shedding of human deciduous teeth was studied by light and electron microscopy. As resorption of the tooth roots neared completion, multinucleate cells appeared on the predentine surface of the coronal dentine between the degenerated odontoblasts, excavated characteristic resorption lacunae in the nonmineralized predentine. These multinucleate cells had the same ultrastructural characteristics as odontoclasts and histochemical demonstration of tartrate-resistant acid phosphatase activity in the multinucleate cells revealed intense staining in numerous small granules identified as lysosomes. Occasionally, the multinucleate cells simultaneously resorbed both nonmineralized and calcospherite-mineralized matrix in the predentine. The study demonstrates that multinucleate odontoclasts can resorb nonmineralized predentine matrix in vivo, probably in the same way as they resorb demineralized organic matrix in the resorption zone underlying their ruffled border.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00303076
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Fine structure of submandibular glands of mice with testicular feminization (Tfm/Y) (1984)
    Springer
    Cell & tissue research 235 (1984), S. 295-301 
    Details
    ISSN: 1432-0878
    Keywords: Tfm/Y mouse ; Submandibular gland ; Sexual ; dimorphism ; Androgens ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The fine structure of the submandibular gland of the mouse with testicular feminization (Tfm/Y) was studied by light and electron microscopy. The architecture of the Tfm/Y gland proved to be rather similar to that of the normal female mouse in both tubular ratio and structure. Granular convoluted tubular cells in Tfm/Y mice characteristically had fewer secretory granules and increased cytoplasmic vacuoles than normal littermates, suggesting an altered synthesis of secretory granules in this cell type of the Tfm/Y mouse. Moreover, there were differences in the ultrastructure of submandibular glands between Tfm/Y and normal female mice. In the gland of the Tfm/Y mouse, basal striations of the striated secretory tubular cells were not so developed and granular intercalated duct cells were less than those of normal females. These findings support the evidence that the secretory tubule of the mouse submandibular gland responds to androgens, resulting in accentuated development in the male, while also suggesting the possibility that the mouse submandibular gland is regulated by other factors which lead to the prominent sexual dimorphism observed in this gland.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00217853
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Lateral diffusion of luminal membrane components during secretion in parotid acinar cells of the rat (1990)
    Springer
    Cell & tissue research 261 (1990), S. 461-466 
    Details
    ISSN: 1432-0878
    Keywords: Secretion ; Plasmalemma ; Membrane dynamics ; Immunocytochemistry ; Freeze-fracturing ; Rat (Wistar)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The movements of the molecular components of the luminal plasma membrane during exocytotic secretion in parotid acinar cells were examined. For immunocytochemical study, we used an antiserum of dipeptidyl peptidase IV as a marker for the components of the luminal plasma membrane of acinar cells. In unstimulated acinar cells, dipeptidyl peptidase IV immunoreactivity is restricted to the luminal plasma membrane. However, after secretion was stimulated with a β-adrenergic agonist, isoproterenol, immunostaining became detectable on the membrane of discharged granules. Freeze-fracture images showed that the density of intramembrane particles on the P-fracture leaflets of discharged granule membranes is much higher than that of undischarged granule membranes during secretion. These results suggest that in parotid acinar cells of the rat, the components of the luminal plasma membrane move laterally, during secretion, to the membranes of discharged granules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00313524
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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