Germinal granules in interstitial cells of the colonial hydroids Obelia longissima pallas, 1766 and Ectopleura crocea Agassiz, 1862

Isaeva, V. V.; Akhmadieva, A. V.; Aleksandrova, Ya. N.; Shukalyuk, Andrey I.; Chernyshev, A. V.

doi:10.1134/s1063074011040055

Cited by 6 publications

(4 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In earthworm E. eugeniae, very limited regeneration studies have been reported [Johnson Retnaraj Samuel et al, 2012;Daisy et al, 2016], and the question why regeneration depends on the clitellum is still not studied in detail. Alkaline phosphatase (ALP) acts as a stem cell marker, and its activity is reported in human embryonic stem cells [O'Connor et al, 2008], regenerating arms of the sea star [Donachy et al, 1990], putative stem cells of hydrozoans [Isaeva et al, 2011], ascidians [Rinkevich et al, 2013], parasitic crustaceans [Shukalyuk et al, 2005], and also in the earthworm, Eisenia fetida [Powell, 1951]. In the present study, using ALP signals, stem cells are tracked in the regeneration events of E. eugeniae using a foldscope.…”

Section: Introductionmentioning

confidence: 94%

Understanding the Role of the Clitellum in the Regeneration Events of the Earthworm Eudrilus eugeniae

Christyraj

Azhagesan

Ganesan

et al. 2019

Cells Tissues Organs

View full text Add to dashboard Cite

Regeneration is a complex mechanism to restore lost or damaged body parts. In earthworms, regeneration capability varies among different species, and it is important to explore the mechanism behind the regeneration process. Interestingly, regeneration in earthworms is either dependent or independent of clitellum segments. In the present study, juvenile earthworms (Eudrilus eugeniae) were amputated at 3 different sites, namely the head, clitellum, and tail segments (at segments 10, 15, and 30, respectively), and their regeneration ability was documented using a foldscope. The amputated segments having the intact clitellum were able to heal the wounds and form the regenerative blastema. The smaller portions of the amputated segments (segments 1-10 and 1-15) without intact clitellum were unable to heal the wound, and death occurs within 12-24 h. The larger portions of the amputated segments (segments 15 and 30 to anus) without intact clitellum were able to heal the wound but lacked the regeneration capability. In control worms, al-kaline phosphatase (ALP) signals were observed at the anterior tip, clitellum, and gut epithelium tissues, whereas, upon amputation, the enriched signals from the clitellum diminished, but profound signals were observed at the amputation site and regenerative blastema. Interestingly, on days 3 and 4, blastemal tips lacked ALP signals due to initiation of the differentiation process in the regeneration blastema. In summary, using a foldscope microscope, the role of the clitellum in the regeneration mechanism was indicated by ALP activity.

show abstract

Section: Introductionmentioning

confidence: 94%

Understanding the Role of the Clitellum in the Regeneration Events of the Earthworm Eudrilus eugeniae

Christyraj

Azhagesan

Ganesan

et al. 2019

Cells Tissues Organs

View full text Add to dashboard Cite

show abstract

“…Alkaline phosphatases have also been linked to stem cells in some organisms (O'Connor et al, 2008;Rinkevich et al, 2013;Shukalyuk et al, 2005;Isaeva et al, 2011). We currently do not know whether opercular regeneration in P. lamarckii involves a stem cell system.…”

Section: Fig 5 Sequences Of Opercular Alkaline Phosphatases (Alp) mentioning

confidence: 99%

“…ALP activity is a sensitive marker of pluripotency in human embryonic stem cells (O'Connor et al, 2008) and is present in putative stem cells of ascidians (Rinkevich et al, 2013), parasitic crustaceans (Shukalyuk et al, 2005) and hydrozoans (Isaeva et al, 2011). ALPs are also active in the mammalian germ line (Buchet et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

The dynamics of alkaline phosphatase activity during operculum regeneration in the polychaete Pomatoceros lamarckii

Szabó¹,

Ferrier²

2014

Int. J. Dev. Biol.

View full text Add to dashboard Cite

Alkaline phosphatase enzymes are found throughout the living world and fulfil a variety of functions. They have been linked to regeneration, stem cells and biomineralisation in a range of animals. Here we describe the pattern of alkaline phosphatase activity in a spiralian appendage, the operculum of the serpulid polychaete Pomatoceros lamarckii. The P. lamarckii operculum is reinforced by a calcified opercular plate and is capable of rapid regeneration, making it an ideal model system to study these key processes in annelids. Alkaline phosphatase activity is present in mesodermal tissues of both intact and regenerating opercular filaments, in a strongly regionalised pattern correlated with major morphological features. Based on the lack of epidermal activity and the broad distribution of staining in mesodermal tissues, calcification-or stem cell-specific roles are unlikely. Transcriptomic data reveal that at least four distinct genes contribute to the detected activity. Opercular alkaline phosphatase activity is sensitive to levamisole. Phylogenetic analysis of metazoan alkaline phosphatases indicates homology of the P. lamarckii sequences to other annelid alkaline phosphatases, and shows that metazoan alkaline phosphatase evolution was characterised by extensive lineage-specific duplications.

show abstract

“…By imposing specific opportunities for and constraints on reproduction, the biophysical properties of seawater and the connectivity of marine habitats are the main physical factors affecting marine organisms (Heyland, Degnan, & Reitzel, 2011). Because fitness is critical for the dispersal and evolution of sedentary organisms (Isaeva, Akhmadieva, Aleksandrova, Shukalyuk, & Chernyshev, 2011; Ritson‐Williams et al., 2009; Shikina & Chang, 2016; Whalan, Johnson, Harvey, & Battershill, 2005), these organisms have developed a diverse array of reproductive strategies and complex life histories (Braendle et al., 2011). One remarkable dispersal strategy is via larvae that may have direct or indirect development, the latter of which is involved in metamorphosis, a transformation from the larval to juvenile stage (Bishop, Huggett, Heyland, Hodin, & Brandhorst, 2006; McEdward, 2000).…”

Section: Introductionmentioning

confidence: 99%

Life‐history traits ofTubastraea coccinea: Reproduction, development, and larval competence

Luz

Domênico

Migotto

et al. 2020

Ecology and Evolution

View full text Add to dashboard Cite

The sun coral Tubastraea coccinea Lesson, 1829 (Dendrophylliidae) is a widely distributed shallow‐water scleractinian that has extended its range to non‐native habitats in recent decades. With its rapid spread, this coral is now one of the main invasive species in Brazil. Its high invasive capability is related to opportunistic characteristics, including several reproductive strategies that have allowed it to disperse rapidly and widely. To better understand the reproductive biology of T. coccinea and aid in developing management strategies for invaded areas, we investigated aspects of its reproductive performance and life cycle, including the effects of colony size, seawater temperature and salinity, and lunar periodicity on offspring production and larval metamorphosis competence. A total of 18,139 offspring were released in different developmental stages, mainly from the larger colonies, which also produced larvae with longer competence periods. The main reproductive peak occurred during the First Quarter and New Moon phases and was highest in water temperatures around 26°C. Together, these results help to explain the rapid expansion of T. coccinea into non‐native habitats such as the Caribbean and southwestern Atlantic, and will inform actions of the recent Brazilian National Plan for the prevention, eradication, control, and monitoring of sun corals.

show abstract

Germinal granules in interstitial cells of the colonial hydroids Obelia longissima pallas, 1766 and Ectopleura crocea Agassiz, 1862

Cited by 6 publications

References 34 publications

Understanding the Role of the Clitellum in the Regeneration Events of the Earthworm <b><i>Eudrilus eugeniae</i></b>

Understanding the Role of the Clitellum in the Regeneration Events of the Earthworm <b><i>Eudrilus eugeniae</i></b>

The dynamics of alkaline phosphatase activity during operculum regeneration in the polychaete Pomatoceros lamarckii

Life‐history traits ofTubastraea coccinea: Reproduction, development, and larval competence

Contact Info

Product

Resources

About