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ECB-ART-47767
Eur J Histochem 2002 Jan 01;462:185-94. doi: 10.4081/1669.
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Engagement of the periesophageal ring during Holothuria polii response to erythrocyte injection.

D'Ancona Lunetta G , Michelucci ML .


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In Holothuria polii, the periesophageal ring is an important organ supplying spherule cells after stimulation with foreign material. In animals injected with formalinized sheep erythrocytes, in fact, a depletion of spherule cells is observed in the periesophageal ring, whereas in the connective tissue, in the external epithelium and around the antigen-injected site, small, transparent cells can be visualized. It is supposed that the latter are stem cells of spherule cells.

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