Abstract
After incubation of aldehyde-fixed sections of rat molar germs in an alkaline solution of lead pyrophosphate, a positive sulphide staining reaction was observed in the mineralization front of the dentin, in the stratum intermedium, and in the subodontoblastic cells. In the electron microscope, the number and size of visible needle-like crystallites was increased in the mineralization zone (intermediate dentin). A fine precipitate was observed predominantly in the nuclei of the stratum intermedium and subodontoblastic cells. The effects of EDTA, Zn2+, Ca2+, Mg2+ and citrate were also studied and the probability of inorganic pyrophosphatase activities is discussed in relation to the observed lead deposits. The interaction of an inorganic pyrophosphatase cannot be excluded in the precipitation of lead phosphate. However, the staining reaction may also be due to uncatalyzed adsorption of the lead compound onto the apatite crystals.
Résumé
Après incubation de coupes de germes de molaires de rats, fixés aux aldéhydes, dans une solution alcaline de pyrophosphate de plomb, une réaction positive de coloration au sulfure est localisée au niveau du front de minéralisation de la dentine, dans le stratum intermedium et les cellules sous-odontoblastiques. Au microscope électronique, le nombre et la taille de cristaux, en forme d'aiguilles, sont augmentés dans la zone en voie de minéralisation (denture intermédiaire). Un fin précipité est surtout observé dans les noyaux du stratum intermedium et les cellules sous-odontoblastiques. Les effects de l'EDTA, Zn2+, Ca2+, Mg2+ et citrate sont aussi étudiés et la probabilité d'activité en pyrophosphatase inorganique est discutée en fonction des dépôts de plomb observés. L'action d'une pyrophosphatase inorganique sur la précipitation du phosphate de plomb ne peut être exclue. Cependant, la réaction de coloration peut être aussi due à une absorption non catalysée de composé de plomb sur les cristaux d'apatite.
Zusammenfassung
Schnitte von Ratten-Molarkeimen, die mit Aldehyd fixiert und in einer alkalischen Blei-Pyrophosphat-Lösung inkubiert wurden, zeigten an folgenden Stellen eine positive Sulfid-Färbungsreaktion: in der Mineralisierungsfront des Dentins, im Stratum intermedium, und in den subodontoblastischen Zellen. Elektronenmikroskopisch waren Anzahl und Größe der sichtbaren, nadelartigen Kristallite in der Mineralisationszone (intermediäres Dentin) erhöht. Ein feiner Niederschlag konnte vorwiegend in den Nuclei des Stratum intermedium und der subodontoblastischen Zellen beobachtet werden. Es wurde zudem die Wirkungsweise von EDTA, Zn2+, Ca2+, Mg2+ und Zitrat untersucht. Schließlich wird die Wahrscheinlichkeit einer Aktivität von anorganischer Pyrophosphatase im Zusammenhang mit den beobachteten Bleiablagerungen besprochen. Daß anorganische Pyrophosphatase bei der Fällung von Bleiphosphat eine Rolle Spielt, ist nicht auszuschließen. Allerdings kann die Farbreaktion auch durch nicht-katalysierte Adsorption der Bleiverbinding an die Apatitkristalle bedingt sein.
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References
Alcock, N. W., Shils, M. D.: Association of inorganic pyrophosphatase activity with normal calcification of rat costal cartilagein vitro. Biochem. J.112, 505–510 (1969)
Bachra, B. N., Fischer, H. R. A.: The effect of some inhibitors on the nucleation and crystal growth of apatite. Calcif. Tiss. Res.3, 348–357 (1969)
Barka, T., Anderson, P. J.: Histochemical methods for acid phosphatase using hexazonium pararosanilin as coupler. J. Histochem.10, 741–753 (1962)
Beckman, G.: Genetics of human placental phosphatases. (Thesis) Tryckeriaktiebolaget City, Umeå (1970)
Bisaz, S., Russel, R. G. G., Fleisch, H.: Isolation of inorganic pyrophosphate from bovine and human teeth. Arch. oral. Biol.13, 683–696 (1968)
Bowness, J. M.: Present concepts of the role of ground substance in calcification. Clin. Orthop.59, 233–247 (1968)
Cartier, P.: Les constituants mineraux des tissus calcifies. V. Separation et identification des pyrophosphates dans le tissu osseux. Bull. Soc. Chim. biol. (Paris)39, 169–180 (1957)
Cox, R. P., Gilbert, P., Griffin, M. J.: Alkaline inorganic pyrophosphatase activity of mammalian cell alkaline phosphatase. Biochem. J.105, 155–161 (1967)
Fleisch, H.: Role of nucleation and inhibition in calcification. Clin. Orthop.32, 170–180 (1964)
Fleisch, H., Russel, R. G. G., Bisaz, S.: Influence of pyrophosphate on the transformation of amorphous to crystalline calcium phosphate. Calcif. Tiss. Res.2, 49–59 (1968)
Fleisch, H., Russel, R. G. G., Straumann, F.: Effect of pyrophosphate on hydroxyapatite and its implications in calcium homeostasis. Nature (Lond.)212, 901–903 (1966)
Fromme, H. G., Höhling, H. J., Riedel, H.: Elektronenmikroskopische Studien über die Dentinbildung 1. Mitteilung: Lokalisation von Calcium und alkalischer Phosphatase. Dtsch. zahnärztl. Z.26, 359–364 (1971)
Glimcher, M. J., Krane, S. M.: The incorporation of radioactive inorganic orthophosphate as organic phosphate by collagen fibrils in vitro. Biochemistry3, 195–203 (1964)
Gomori, G.: Microscopic histochemistry. Chicago: Chicago Univ. Press 1952
Hägg, G.: General and anorganic chemistry [in Swedish]. 4: e uppl. Uppsala: Almquist & Wiksells 1969
Höhling, H. J., Kreilos, R., Neubauer, G., Boyde, A.: Electron microscopy and electron microscopical measurements of collagen mineralization in hard tissues. Z. Zellforsch.122, 36–52 (1971)
Höhling, H. J., Steffens, H.: Untersuchungen zur Mineralisierungsdichte im Hartgewebe mit Protein-polysaccharid bzw. mit Kollagen als Hauptbestandteil der Matrix. Z. Zellforsch.134, 283–296 (1972)
Hugon, J., Borgers, M.: Ultrastructural localization of alkaline phosphatase activity in the absorbing cells of the duodenum of mouse. J. Histochem. Cytochem.14, 629–640 (1966)
Korhonen, L. K.: Der histochemische Nachweis von anorganischen Pyrophosphatasen. I. Die „alkalische” anorganische Pyrophosphatase. Acta histochem. (Jena)17, 174–185 (1964)
Kuhlman, R. E.: Phosphatases in epiphyseal cartilage. J. Bone Jt Surg. A47, 545–550 (1965)
Libanati, C. M., Tandler, C. J.: The distribution of the watersoluble inorganic orthophosphate ions within the cell: accumulation in the nucleus. J. Cell Biol.42, 754–765 (1969)
Litsova, I., Holman, J., Hruska, K. J.: Histochemical demonstration of alkaline inorganic pyrophosphatase in male accessory sexual glands of the mouse, rat and guinea-pig. Acta histochem. (Jena)32, 178–186 (1969)
Luft, J. H.: Improvements in epoxy resin embedding methods. J. biophys. biochem. Cytol.9, 409–414 (1961)
Matsuzawa, T., Anderson, H. C.: Phosphatases of epiphyseal cartilage studied by electron microscopic cytochemical methods. J. Histochem. Cytochem.19, 801–808 (1971)
Meyer, J. L., Eick, J. D., Nancollas, G. H., Johnson, L. N.: A scanning electron microscopic study of the growth of hydroxyapatite crystals. Calcif. Tiss. Res.10, 91–102 (1972)
Molnar, Zelma: Development of the parietal bone of young mice. I. Crystals of bone mineral in frozen dried preparations. J. Ultrastruct. Res.3, 39–42 (1959)
Nayudu, P. R. V., Miles, P. L.: Inhibition of pyrophosphatase activity of mouse duodenal alkaline phosphatase by Mg ions. Biochem. J.115, 29–35 (1969)
Nelson, L.: Inorganic pyrophosphatase distribution in spermatozoan flagella. J. Histochem. Cytochem.7, 293–295 (1959)
Novikoff, A. B.: The validity of histochemical phosphatase methods on the intracellular level. Science113, 320–325 (1951)
Nuki, K., Bonting, S. L.: Quantitative histochemistry of the developing hamster tooth: alkaline phosphatase and lactic dehydrogenase. J. Histochem. Cytochem.9, 117–125 (1961)
Pak, C. Y. C., Diller, E. C.: Ionic interaction with bone mineral. V. Effect of Mg2+, citrate3−, F− and SO4 2− on the solubility, dissolution and growth of bone mineral. Calcif. Tiss. Res.4, 69–77 (1969)
Perkins, H. R., Walker, P. G.: The occurrence of pyrophosphate in bone. J. Bone Jt Surg. B40, 333–339 (1958)
Plocke, D. J., Levinthal, C., Vallee, B. L.: Alkaline phosphatase ofEscherichia coli: A zinc metalloenzyme. Biochemistry1, 373–378 (1962)
Posner, A. S.: Crystal chemistry of bone mineral. Physiol. Rev.49, 760–792 (1969)
Reynolds, E. S.: The use of lead citrate at high pH as an electronopaque stain in electron microscopy. J. Cell Biol.17, 208–212 (1963)
Robertson, W. G., Morgan, D. B.: Effect of pyrophosphate on the exchangeable calcium pool of hydroxyapatite crystals. Biochim. biophys. Acta (Amst.)230, 495–503 (1970)
Sobel, A. E., Burger, M., Nobel, S.: Mechanisms of nuclei formation in mineralizing tissues. Clin. Orthop.17, 103–123 (1960)
Strates, B., Neuman, W. F.: On the mechanism of calcification. Proc. Soc. exp. Biol. (N.Y.)97, 688–691 (1958)
Symons, N. B. B.: The microanatomy and histochemistry of dentinogenesis. In: Structural and chemical organization of teeth, p. 285–324. Ed. A. E. W. Miles, London-New York: Acad. Press 1967
Takuma, S.: Ultrastructure of dentinogenesis. In: Structural and chemical organisation of teeth, p. 325–370. Ed. A. E. W. Miles. London-New York: Acad. Press 1967
Termine, J. D., Posner, A. S.: Amorphous/crystalline interrelationships in bone mineral. Calcif. Tiss. Res.1, 8–23 (1967)
Termine, J. D., Posner, A. S.: Calcium phosphate formation in vitro. I. Factors affecting initial phase separation. Arch. Biochem. Biophys.140, 307–317 (1970)
Urist, M. R.: Origins of current ideas about calcification. Clin. Orthop.44, 13–39 (1966)
Urist, M. R., Dowell, T. A.: The newly deposited mineral in cartilage and bone matrix. Clin. Orthop.50, 291–308 (1967)
Vallee, B. L., Coombs, T. L., Hoch, F. L.: The “active site” of bovine pancreatic carboxypeptidase A. J. biol. Chem.235, PC45-PC47 (1960)
Wachstein, M., Meisel, E.: Histochemistry of hepatic phosphatases at a physiologic pH. Amer. J. clin. Path.27, 13–23 (1957)
Wöltgens, J. H. M., Bonting, S. L., Bijvoet, C. L. M.: Relationship of inorganic pyrophosphatase and alkaline phosphatase in hamster molars. Calcif. Tiss. Res.5, 333–343 (1970)
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Larsson, Å., Helander, H.F. Studies on dentinogenesis in the rat. Light, electron microscopic and histochemical studies on the interaction between lead pyrophosphate solutions and dentin-producing tissues. Calc. Tis Res. 14, 87–104 (1974). https://doi.org/10.1007/BF02060286
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DOI: https://doi.org/10.1007/BF02060286