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Related Experiment Video

Updated: Jul 25, 2026

Calcification of Vascular Smooth Muscle Cells and Imaging of Aortic Calcification and Inflammation

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Published on: May 31, 2016

Calcified arteries in a gastropod.

A S Tompa, N Watabe

Calcified Tissue Research

|December 22, 1976

Summary

Land snails like Anguispira alternata store significant calcium carbonate deposits within their major arteries. These unique arterial calcium deposits are found inside specialized spherule cells.

Area of Science:

* Invertebrate Biology
* Biomineralization
* Comparative Physiology

Background:

* Calcium deposits are observed in various invertebrate tissues.
* Arterial calcification has not been previously documented in invertebrate vessels.
* Spherule cells containing calcium deposits are found in the arteries of Anguispira alternata.

Purpose of the Study:

* To investigate the presence and nature of calcium deposits in the arterial walls of the land snail Anguispira alternata.
* To characterize the cellular location and morphology of these deposits.
* To determine the incorporation of calcium into these structures.

Main Methods:

* Histological examination of the anterior aorta and major arteries.
* Identification of calcium deposits within intracellular spherules.

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* Radioisotope tracing using 45Ca injection to track calcium incorporation.

Main Results:

* Large calcium carbonate deposits were identified within spherule cells lining the arterial walls.
* These deposits exhibit layered organic and inorganic material.
* Radioactive 45Ca was rapidly incorporated into the spherule cells after injection.

Conclusions:

* The land snail Anguispira alternata possesses arterial calcium deposits within specialized cells.
* These deposits represent a novel occurrence of calcification in invertebrate arterial systems.
* The physiological role of these arterial calcium deposits remains undetermined.