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Experimental calcification in a number of species

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Abstract

The subcutaneous injection of dilute solutions of lead acetate in mice, rats, rabbits, guinea pigs, hamsters and chickens, was followed by calcification around the injection site. In spite of the variations in the number of mast cells present at the injection site in these different animals, marked macroscopic calcification occurred. The initial reaction is considered as a combination of the injected lead ions with collagen fibres. This is followed by an influx of calcium and phosphate ions from locally dilated capillaries followed by calcification. The role of the mast cell is considered to be that of dilating local small blood vessels associated with release of their granules. In the fowl, however, while the sequence of events was similar, mast cells were not seen around the injection site. Other vasodilators may, therefore, be involved in the process.

Résumé

L'injection sous-cutanée de solutions diluées d'acétate de plomb est suivie par une calcification autour des régions d'injection chez la souris, le rat, le lapin, le cobaye, le hamster et le poulet. Malgré les variations numériques des mastocytes présents dans les régions d'injection, une calcification marquée est observée. La réaction initiale est considérée comme une combinaison des ions de plomb avec les fibres collagènes, suivie par un afflux d'ions de calcium et phosphate, en provenance des capillaires locaux dilatés, avec calcification. Le rôle du mastocyte parait consister en une action dilatatrice locale des vaisseaux avec décharge de granules. Chez le poulet, bien que la séquence des évènements soit semblable, on n'observe pas de mastocytes dans les zones d'injection. D'autres vaso-dilatateurs peuvent done intervenir.

Zusammenfassung

Mäuse, Ratten, Kaninchen, Meerschweinchen, Hamster und Küken, welchen Bleiacetat-Lösungen subcutan injiziert wurden, zeigten Verkalkungen rund um die Injektionsstelle.

Trotz den unterschiedlichen Mengen von Mastzellen, welche sich bei diesen verschiedenen Tieren an der Injektionsstelle vorfanden, fand eine ausgeprägte makroskopische Verkalkung statt. Die Anfangsreaktion wird als eine Verbindung der injizierten Bleiionen mit Collagenfasern angesehen. Darauf folgt ein Zufluß von Calcium- und Phosphationen aus lokal dilatierten Capillaren und dann Verkalkung. Die Rolle der Mastzellen sieht man in ihrer Fähigkeit, lokale kleine Blutgefäße zu dilatieren, was einhergeht mit der Degranulation der Mastzellen. Beim Huhn ist der Ablauf der Ereignisse ähnlich, jedoch konnten keine Mastzellen rund um die Injektionsstelle gesehen werden. Deshalb ist es möglich, daß andere Vasodilatatoren ebenfalls an dem Vorgang beteiligt sind.

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Bridges, J.B., McClure, J. Experimental calcification in a number of species. Calc. Tis Res. 10, 136–141 (1972). https://doi.org/10.1007/BF02012543

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  • DOI: https://doi.org/10.1007/BF02012543

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