Regeneration in Annelids

Herlant-Meewis, Henriette

doi:10.1016/b978-1-4831-9951-1.50008-5

Cited by 75 publications

(60 citation statements)

References 61 publications

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“…Growth factors and hormones that mediate regeneration processes could also be synthesized by other tissues, like body wall or alimentary canal. In addition, earthworm VNC not only mediates the regeneration but also has an enormous capability to regenerate itself after injury (Herlant-Meewis 1964;Lubics et al 2002).…”

Section: Introductionmentioning

confidence: 97%

“…Neoblasts are small basophilic mesodermal cells characterized by high nuclear-cytoplasm ratio. These cells are totipotent stem cells found in all segments of intact earthworms and migrate to severed body parts in regenerating animals and believed to play a role in the formation of renewed tissues (Herlant-Meewis 1964;Jamieson 1981).…”

Section: Introductionmentioning

confidence: 98%

“…Some earthworm species have enormous capability to regenerate lost body parts; however, the anatomical site of amputation determines the mode and success of regeneration (Herlant-Meewis 1964). During caudal regeneration of earthworm, when segments up to clitellar region of the body are amputated, wound healing and blastema formation can be seen at the severed segments.…”

Section: Introductionmentioning

confidence: 99%

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Expression of PACAP-Like Compounds During the Caudal Regeneration of the Earthworm Eisenia fetida

et al. 2008

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The regeneration of the ventral nerve cord ganglion and peripheral tissues was investigated by radioimmunoassay and immunohistochemistry in the model animal, Eisenia fetida (Annelida, Oligochaeta). It is now well-established that pituitary adenylate cyclase-activating polypeptide (PACAP) is a neurotrophic factor, playing important roles in the development of the nervous system in vertebrate animals. Based on the apparent evolutionary conservation of PACAP and on the several common mechanisms of vertebrate and invertebrate nervous regeneration, the question was raised whether PACAP has any role in the regeneration of the earthworm nervous system. As a first step, we studied the distribution, concentration, and time-course of PACAP-like immunoreactivity during caudal regeneration of both lost segments and the ventral nerve cord ganglia in E. fetida. A strong upregulation of PACAP-like immunoreactivity was observed in most tissues following injury as determined by radioimmunoassay and immunohistochemistry. Significant increases in the concentration of PACAP-like compounds were found in the body wall, alimentary canal, and in coelomocytes. The most characteristic morphological feature was the accumulation of immunolabeled neoblasts in the injured tissues, especially in the ventral nerve cord ganglion that initiates and mediates regeneration processes. Our present results show that PACAP/PACAP-like peptides accumulate in the regenerating tissues of the earthworm, suggesting trophic functions of these compounds in earthworm tissues similarly to vertebrate species.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Expression of PACAP-Like Compounds During the Caudal Regeneration of the Earthworm Eisenia fetida

et al. 2008

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“…Following removal of only the asegmental region, regeneration of the prostomium has been documented in several species of Erséus and Källersjö (2004), Struck et al (2007), Struck et al (2011), andWeigert et al (2014). Regeneration data are from Morgulis (1909), Cresp (1952), Olive and Moore (1975), Nusetti et al (2005), Hentschel and Harper (2006), and Giani et al (2011) or are reviewed in Hyman (1940), Berrill (1952, Herlant-Meewis (1964), Bely (2006Bely ( , 2010. AR -anterior regeneration; PR -posterior regeneration. naidid clitellates (including one that cannot regenerate segments), but fails to occur in at least one species of naidid, two species of dorvilleid, and one species of nereid (Pfannenstiel, 1973(Pfannenstiel, , 1974Bely and Sikes, 2010a).…”

Section: Annelidamentioning

confidence: 99%

Regeneration in spiralians: evolutionary patterns and developmental processes

Bely¹,

Zattara²,

Sikes³

2014

Int. J. Dev. Biol.

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Animals differ markedly in their ability to regenerate, yet still little is known about how regeneration evolves. In recent years, important advances have been made in our understanding of animal phylogeny and these provide new insights into the phylogenetic distribution of regeneration. The developmental basis of regeneration is also being investigated in an increasing number of groups, allowing commonalities and differences across groups to become evident. Here, we focus on regeneration in the Spiralia, a group that includes several champions of animal regeneration, as well as many groups with more limited abilities. We review the phylogenetic distribution and developmental processes of regeneration in four major spiralian groups: annelids, nemerteans, platyhelminths, and molluscs. Although comparative data are still limited, this review highlights phylogenetic and developmental patterns that are emerging regarding regeneration in spiralians and identifies important avenues for future research.

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“…A brain hormone released soon after segment loss that initiates the process of regeneration in Eisenia fetida, Lumbricus terrestris, Allolobophora terrestris and Lumbricus rubellus [5,6]. In contrast, it was found that brain removal followed by loss of body segments did not prevent posterior regeneration in Eisenia fetida [7] and Allolobophora icterica [8]. The ventral nerve cord C 3 neurosecretory cells exhibited spectacular cytological response to the loss of anterior segments [9].…”

mentioning

confidence: 99%

Neuroendocrine control of posterior regeneration in tropical earthworm, Eudrilus eugeniae (Kinberg)

Banik¹,

Chaudhuri²

2016

JLS

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Eudrilus eugeniae (Kinberg), well known vermicomposting earthworms, are often subjected to predator attacks leading to loss of body parts due to their surface living habit. Thus nature has gifted them the power of regeneration of lost body parts. As neurosecretion is the sole source of hormone in oligochaetes, we hypothesize that neurohormone secreted from the neurosecretory cells of the central nervous system (CNS) will control the phenomenon of regeneration in earthworms. In Eudrilus eugeniae, appearance of regeneration blastema was noticed within 72 h of posterior amputation. In fact, posterior amputation brought about multiple cytoplasmic alteration in the neurosecretory cells (NSCs) viz. deep stained A cells and moderately stained B cells in cerebral ganglia, deep stained 'U' cells and moderately stained B cells in the sub-esophageal and ventral nerve cord ganglia. Massive depletion followed by marginal accumulation of NSM in the NSCs following 24 h and 48 h of amputation were recorded. Thereafter (72 h and 96 h of amputation) moderate to massive engorgement of NSM in the B cells, coupled with spectacular increase in number of A cells were noticed. Sequential changes involved in the secretory dynamics of NSCs, as well as, NSM accumulation both within and periphery of the ganglia (perineurium) provides evidence for the utilization of materials through repaired vascular systems during posterior regeneration in E. eugeniae.

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Regeneration in Annelids

Cited by 75 publications

References 61 publications

Expression of PACAP-Like Compounds During the Caudal Regeneration of the Earthworm Eisenia fetida

Expression of PACAP-Like Compounds During the Caudal Regeneration of the Earthworm Eisenia fetida

Regeneration in spiralians: evolutionary patterns and developmental processes

Neuroendocrine control of posterior regeneration in tropical earthworm, Eudrilus eugeniae (Kinberg)

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