vasa‐related genes and their expression in stem cells of colonial parasitic rhizocephalan barnacle Polyascus polygenea (Arthropoda: Crustacea: Cirripedia: Rhizocephala)

  title={vasa‐related genes and their expression in stem cells of colonial parasitic rhizocephalan barnacle Polyascus polygenea (Arthropoda: Crustacea: Cirripedia: Rhizocephala)},
  author={Andrey I. Shukalyuk and Kseniya Golovnina and Sergei I. Baiborodin and Konstantin V. Gunbin and Alexander G. Blinov and Valeria V. Isaeva},
  journal={Cell Biology International},

Morphofunctional organization of reserve stem cells providing for asexual and sexual reproduction of invertebrates

Stem cells in animals of such diverse taxa feature the presence of germinal granules, are positive for proliferating cell nuclear antigen, and demonstrate alkaline phosphatase activity (a marker of embryonic stem cells and primary germ cells in vertebrates).

Crustacean Parasites as Phylogenetic Indicators in Decapod Evolution

The evolutionary history of decapods and their parasites is assessed with particular reference to the use of parasites as proxies for host phylogeny, suggesting that host switching has been frequent in these parasites, with cblonization of caridean shrimp occurring in both groups.

The hidden coloniality at the parasitic stage in Peltogaster reticulatus (Crustacea: Rhizocephala)

It is shown that stolon buds and primordial externae in P. reticulatus internae intensively express alkaline phosphatase activity, the classical histochemical marker for mammalian embryonic stem and primary germ cells.

Identification and characteristics of DDX3 gene in the earthworm, Perionyx excavatus

In this study, the DDX3 gene in the earthworm, Perionyx excavatus having a powerful regeneration capacity, total RNA was isolated from adult head containing clitellum and identified by RT-PCR using the total RNA from head as a template and it was confirmed that Pe-DDX3 has the nine conserved motifs of DEAD-box family.

Stem cells in reproductive strategy of asexually reproducing invertebrates

Stem cells of the colonial rhizocephalans, Peltogasterella gracilis, Polyascus polygenea and Thylacoplethus isaevae, the turbellarian Dugesia tigrina, the colonial hydroid Obelia longissima, and cultured embryonic stem cells of mouse are studied.

Germline maintenance and regeneration in the amphipod crustacean, Parhyale hawaiensis

Insight is provided into germline specification, the GSC niche, and adult regeneration in the amphipod crustacean, Parhyale hawaiensis, and the potential role of bone morphogenetic protein (BMP) signaling in Par Hyalegermline maintenance and regeneration is investigated.



Comparative morphology and phylogeny of the family Thompsoniidae (Cirripedia, Rhizocephala, Akentrogonida), with descriptions of three new genera and seven new species

A numerical cladistic analysis of all Rhizocephala Akentrogonida using the Hennig 86 program leads to a redefinition of the Thompsoniidae HOeg and Rybakov, 1992 and a phylogeny for the redefined family is proposed.


A new genus is established, Polyascus, to accommodate three members of this clade of parasitic crustaceans that exclusively parasitize other Crustacea which also share a number of common morphological features.

The structure of colonial interna in Sacculina polygenea (Crustacea: Cirripedia: Rhizocephala)

It is shown that the colonial interna of S. polygeneαinterna comprising numerous elements of reproductive and trophic systems represented b y numerous primordia of externae at different stages of development.

Characterization of an ascidian DEAD-box gene, Ci-DEAD1: specific expression in the germ cells and its mRNA localization in the posterior-most blastomeres in early embryos

This work proposes precursors of primordial germ cells in ascidians, which were present in unfertilized eggs and in the central cytoplasm of blastomeres until the two-cell stage.

Oyster vasa-like gene as a marker of the germline cell development in Crassostrea gigas.

Asexual reproduction as part of the life cycle in Sacculina polygenea (Cirripedia: Rhizocephala: Sacculinidae).

It is estimated that the externae die and are replaced 1-3 times during the life of a crab, the host molting and growing between replacements, and the average number and size of theExternae increase at each instar.

Development of primordial externae in the colonial interna of Polyascus polygenea (Crustacea: Cirripedia: Rhizocephala)

Careful and thorough investigations of rnorpho・ genesis i n prirnordial externae support the previous results and agree with the findings of other authors.

Organization of Interna in Sacculina polygenea (Crustacea: Rhizocephala)

Trophic and reproductive systems of colonial interna in Sacculina polygenea, a parasite of the coastal crab Hemigrapsus sanguineus, are found and the term individual is proposed to be used for the externa in rhizocephalan barnacles with its trophic system.

A study of the morphology and biology of Thompsonia littoralis (Crustacea : Cirripedia : Rhizocephala)

The presence of externae significantly prolongs the host's normal intermoult period and minimizes its growth, and the parasite has little effect on thehost's sexual characters although females are normally sterilized.

The vasa‐like gene, olvas, identifies the migration path of primordial germ cells during embryonic body formation stage in the medaka, Oryzias latipes

The medaka homolog of the Drosophila vasa gene, olvas (Oryzias latipes vas) was obtained using polymerase chain reaction of medaka cDNA from the testis and ovary, and the distribution and migration path of primordial germ cells during early stages of embryonic‐body formation were revealed using the olva gene as a germline cell marker.