General characterization of regeneration in Aeolosoma viride (Annelida, Aeolosomatidae)
Journal
Invertebrate Biology
Journal Volume
139
Journal Issue
1
Start Page
e12277
ISSN
1077-8306
Date Issued
2020-01-19
Author(s)
Chen, Chiao‐Ping
Fok, Sheridan Ke-Wing
Hsieh, Yu‐Wen
Chen, Cheng‐Yi
Chang, Yao‐Hsiang
Abstract
Regeneration has long been the focus of scientific interest for its potential to restore lost, damaged, or aged tissues and organs. A wide range of regenerative studies have been conducted on different vertebrate and invertebrate model organisms. Annelids are known for their regenerative capacities, and because of their relatively complex organ systems, they are an ideal organism for regeneration study. Our present work focused on the freshwater annelid Aeolosoma viride, an asexually reproducing annelid capable of regenerating both anteriorly and posteriorly. Even though regenerative ability has been documented in this animal in previous studies, detailed characterization of the process is still unavailable. The objective of this study was to evaluate the regenerative ability of A. viride. We described the sequential morphological events during the process of regeneration, such as wound healing and the formation of blastema, mouth, and pygidium. In order to clarify the capacity and type of regeneration, we conducted a series of observations and experiments using a cell proliferation assay. Massive proliferation and the absence of cell migration indicated that the animal regenerates primarily through epimorphosis. Our study of the epimorphic regenerative process of A. viride provides a clearer picture of the evolutionary origin of regeneration in annelids.
Subjects
annelids
blastema
cell proliferation
epimorphosis
morphallaxis
Publisher
Blackwell Publishing Inc.
Description
Article number e12277
Type
journal article