Transfer of 45Ca during amelogenesis studied by autoradiography and electron microscopy

Calcified Tissue Research
N Nagai, R M Frank

Abstract

45Ca transfer through the stratum intermedium and the secreting ameloblasts towards enamel has been studied by quantitative electron microscopical autoradiography in tooth-germs of newborn cats following intravenous injection of the isotope. Two transfer pathways were demonstrated. The relatively more important direct path passed through the stratum intermedium and ameloblast intercellular spaces and reached the enamel directly. The second pathway consisted in an intracellular transfer through the ameloblasts. 45Ca penetrated the cell through its basal pole. The mitochondria were the most highly labeled organelles at the different experimental time intervals studied. A maximum of radioactivity was respectively noticed at 30 min and 1 h in the endoplasmic reticulum and the Golgi apparatus. A total absence of silver grains was noted over the secretory ameloblastic bodies. At 6 h, the highest labeling was observed over enamel and especailly over the inner enamel along the enameldentin junction.

References

Jan 1, 1974·Cell and Tissue Research·N Nagai, R M Frank
Jun 1, 1968·The Anatomical Record·H Warshawsky
Jan 1, 1971·Clinical Orthopaedics and Related Research·E Bonucci
Jan 1, 1972·Calcified Tissue Research·P N Hirschmann, G Nichols
Oct 1, 1972·Journal of Ultrastructure Research·G W Bernard
Jun 1, 1971·Journal of Ultrastructure Research·E Kallenbach
Jul 1, 1967·Archives of Oral Biology·N W Johnson
Jan 1, 1970·Journal of Ultrastructure Research·E J Reith
Mar 27, 1968·Calcified Tissue Research·J L MatthewsE J Collins
May 1, 1962·Archives of Oral Biology·E J REITH, V F COTTY

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Citations

Apr 1, 1987·Cell and Tissue Research·T Sasaki, P R Garant
Feb 1, 1997·The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society·T Kawamoto, M Shimizu
Mar 1, 1977·Journal of Dental Research·J W Bawden, A Wennberg
May 1, 1978·The Anatomical Record·K J Kuhar, D R Eisenmann
Mar 1, 1979·The Anatomical Record·D R EisenmannA Neiman
Feb 1, 1978·Journal of Dental Research·A Wennberg, J W Bawden
Jun 1, 1990·Calcified Tissue International·T Kawamoto, M Shimizu
Dec 1, 1987·Advances in Dental Research·T SasakiP R Garant
Jan 1, 1984·Histochemistry·E J ReithA Boyde
Mar 1, 1979·Journal of Dental Research·J W Bawden, A Wennberg
Dec 1, 1987·Advances in Dental Research·P R GarantP E Colflesh
Dec 1, 1987·Advances in Dental Research·T Kawamoto, M Shimizu
Apr 1, 1989·Scandinavian Journal of Dental Research·M CaracatsanisL Hammarström
Jun 1, 1989·The Anatomical Record·J W Bawden

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