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ISSN 2992-779X (Electronic)
ISSN 2007-6452 (Print)

2013, Number 3

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Investigación en Discapacidad 2013; 2 (3)

Characterization of the arm regeneration of the echinoderm Ophiothrix lineata (Lyman, 1860)

Alarcón-Reyes YE, Zarza-Meza E, San Martín AP, Hernández-Herrera RI, Cuervo R

Language: Spanish
References: 17
Page: 103-109
PDF size: 325.27 Kb.


ABSTRACT

Body regeneration is a common ability in most protostomate species, opposite to the lack of such ability in deuterostomates. Regeneration in Echinodermata species is important to understand regeneration in some exceptional chordate species. Echinodermata species have a great ability to regenerate anatomical structures from their three germinal layers. In present study, an arm was cut at its insertion in disc, at the first vertebra in Ophiotrix lineata, which is a deuterostomate eccinoderm in search for its regeneration ability by recording periodical stages in such a potential ability, since the very starting of a bud until the whole functional differentiation. Records were taken every five days during a one-month span. Histological examinations were performed through the first eight days after amputation. Results demonstrated a growth of 0.23 mm per day. Regeneration process was observed in four stages as follows: first, re-epithelization of hurt disc, second, the formation of a regenerative blastema, third, lengthening and segmentation of blastema, and fourth, cellular differentiation and mechanical function of regenerated arm. It is remarkable the rapid formation of blastema as well as the presence of radial nerve at sixth day after amputation.


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