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Russian Journal of Marine Biology

, Volume 27, Issue 3, pp 168–173 | Cite as

Regeneration of the Digestive Tube in the Holothurian Apostichopus japonicusafter Evisceration

  • A. I. Shukalyuk
  • I. Yu. Dolmatov
Article

Abstract

We performed a TEM study of regeneration of the intestine in the Far Eastern trepang, the holothurian Apostichopus japonicus, after evisceration. The following stages were distinguished in the restoration process of the digestive tube: the growth of connective tissue along the margin of the mesenterium, in the place of rupture; dedifferentiation of cells and their migration and proliferation; the rooting of the esophagus lining into the connective tissue anlage; and the transformation of esophagus cells into cells of the middle part of the intestine. The migration of epithelium into the area of regeneration takes place through a solid cellular layer, without breaking of the cell contacts. The mitotic activity was registered in all stages of restoration; the dividing cells were located chaotically, without the development of a blastema.

regeneration evisceration Apostichopus japonicus digestive tube 

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Copyright information

© MAIK “Nauka/Interperiodica” 2001

Authors and Affiliations

  • A. I. Shukalyuk
    • 1
  • I. Yu. Dolmatov
    • 1
  1. 1.Institute of Marine Biology, Far East DivisionRussian Academy of SciencesVladivostokRussia

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