Ultrastructural Features of Gut Regeneration in Five-Month-Old Pentactulae of the Holothurian Eupentacta fraudatrix

Ultrastructural Features of Gut Regeneration in Five-Month-Old Pentactulae of the Holothurian... Posterior regeneration of the digestive system after bisection was investigated in the anterior halves of the five-month-old pentactulae of the holothurian Eupentacta fraudatrix using electron microscopy. Three stages of gut restoration were distinguished. The first stage is characterized by degradation of the damaged part of the gut followed by wound healing. Active morphogenetic processes (cell proliferation, dedifferentiation, cell migration, and redifferentiation) are observed at the second stage. During the third (final) stage, the ablated parts differentiate in the posterior portion of the intestine. The cells of the gut remnant tissues were shown to be the cell sources of regeneration. Based on both the data available from the literature and the results of our study, the conclusion was drawn that the mechanisms of gut restoration differ significantly in the pentactulae and adults of E. fraudatrix. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Marine Biology Springer Journals

Ultrastructural Features of Gut Regeneration in Five-Month-Old Pentactulae of the Holothurian Eupentacta fraudatrix

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Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2001 by MAIK “Nauka/Interperiodica”
Subject
Life Sciences; Freshwater & Marine Ecology
ISSN
1063-0740
eISSN
1608-3377
D.O.I.
10.1023/A:1013705504876
Publisher site
See Article on Publisher Site

Abstract

Posterior regeneration of the digestive system after bisection was investigated in the anterior halves of the five-month-old pentactulae of the holothurian Eupentacta fraudatrix using electron microscopy. Three stages of gut restoration were distinguished. The first stage is characterized by degradation of the damaged part of the gut followed by wound healing. Active morphogenetic processes (cell proliferation, dedifferentiation, cell migration, and redifferentiation) are observed at the second stage. During the third (final) stage, the ablated parts differentiate in the posterior portion of the intestine. The cells of the gut remnant tissues were shown to be the cell sources of regeneration. Based on both the data available from the literature and the results of our study, the conclusion was drawn that the mechanisms of gut restoration differ significantly in the pentactulae and adults of E. fraudatrix.

Journal

Russian Journal of Marine BiologySpringer Journals

Published: Oct 16, 2004

References

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