Virus-like particles in Urastoma cyprinae, a turbellarian parasite of Mytilus galloprovincialis

Crespo-González, Celia; Rodríguez, Helena; Soto-Búa, M.; Iglesias, R.; Arias-Fernández, C.; Estévez, Juan José Ibáñez

doi:10.3354/dao01889

Cited by 7 publications

(8 citation statements)

References 13 publications

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“…The turbellarians observed in the present work are probably Urastoma cyprinae since they usually occur in mantle cavities and gills of bivalves (Brun et al , 1999; Rayyan et al , 2004; Crespo-González et al , 2008). The encysted organisms found in A. brasiliana probably resulted from the incubation of gills in RFTM that induced the formation of cysts coating the turbellarian to protect it from the unusual external environmental.…”

Section: Discussionmentioning

confidence: 52%

Pathologies in commercial bivalve species from Santa Catarina State, southern Brazil

2011

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A survey on esophageal cancer exposure from 1995 to 1997 was carried at the radiother-apy service of the Charity Hospital in Florianopolis city, capital of Santa Catarina State, southern region of Brazil. From a total of 2,495 medical registers, 134 cases were of esophageal cancer affecting 80.5% of males and only 19.5% of females. Most of the patients were from the South and West regions of Santa Catarina (28 and 27%, respectively), regions of high corn flour consumption and maize production. It was observed that farmers presented the highest incidence of esophageal cancer, followed by bricklayers, miners, drivers, and carpenters. Most of the patients had the habit of smoking and drinking alcohol regularly, and 27% of patients used to drink chimarrao. Some patients had those habits associated i.e., they used to smoke, drink alcohol, and also have chimarrdo.

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Section: Discussionmentioning

confidence: 52%

Pathologies in commercial bivalve species from Santa Catarina State, southern Brazil

2011

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“…Detection of new viruses is often a serendipitous event during ultrastructural studies (e.g. 20,23,30 ). In our case we found VLPs when studied of symbiotic associations of bacteria with an invertebrate.…”

Section: Discussionmentioning

confidence: 99%

First evidence of virus-like particles in the bacterial symbionts of Bryozoa

Vishnyakov

Karagodina

Lim-Fong

et al. 2021

Sci Rep

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Bacteriophage communities associated with humans and vertebrate animals have been extensively studied, but the data on phages living in invertebrates remain scarce. In fact, they have never been reported for most animal phyla. Our ultrastructural study showed for the first time a variety of virus-like particles (VLPs) and supposed virus-related structures inside symbiotic bacteria in two marine species from the phylum Bryozoa, the cheilostomes Bugula neritina and Paralicornia sinuosa. We also documented the effect of VLPs on bacterial hosts: we explain different bacterial ‘ultrastructural types’ detected in bryozoan tissues as stages in the gradual destruction of prokaryotic cells caused by viral multiplication during the lytic cycle. We speculate that viruses destroying bacteria regulate symbiont numbers in the bryozoan hosts, a phenomenon known in some insects. We develop two hypotheses explaining exo- and endogenous circulation of the viruses during the life-cycle of B. neritina. Finally, we compare unusual ‘sea-urchin’-like structures found in the collapsed bacteria in P. sinuosa with so-called metamorphosis associated contractile structures (MACs) formed in the cells of the marine bacterium Pseudoalteromonas luteoviolacea which are known to trigger larval metamorphosis in a polychaete worm.

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“…Detection of new viruses is often a serendipitous event during ultrastructural studies (e.g. Reuter 1975; Vacelet & Gallissian 1978; Crespo-González et al 2008). In our case we found VLPs when studied of symbiotic associations of bacteria with an invertebrate.…”

Section: Discussionmentioning

confidence: 99%

“…In the marine realm, the large variety of viruses are found across diverse taxa, including protists and various invertebrates such as sponges, cnidarians, flatworms, polychaetes, mollusks, crustaceans and echinoderms (reviewed in Johnson 1984; Weinbauer 2004; Munn 2006; Lang et al 2009; Rosario et al 2015; see also Reuter 1975; Vijayan et al 2005; Nobiron et al 2008; Crespo-González et al 2008; Marhaver et al 2008; Claverie et al 2009; Jackson et al 2016 and references therein). Being present in large numbers in the seawater (Suttle 2005; Brum et al 2013), viruses, among others, enter suspension-feeders (e.g.…”

Section: Introductionmentioning

confidence: 99%

First evidence of virus-like particles in the bacterial symbionts of Bryozoa

Vishnyakov

Karagodina

Lim-Fong

et al. 2020

Preprint

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23Bacteriophage communities associated with humans and vertebrate animals have been 24 extensively studied, but the data on phages living in invertebrates remain scarce. In 25 fact, they have never been reported for most animal phyla. Our ultrastructural study 26 2 showed for the first time a variety of virus-like particles (VLPs) and supposed virus-27 related structures inside symbiotic bacteria in two marine species from the phylum 28 Bryozoa, the cheilostomes Bugula neritina and Paralicornia sinuosa. We also 29 documented the effect of VLPs on bacterial hosts: we explain different bacterial 30 'ultrastructural types' detected in bryozoan tissues as stages in the gradual destruction 31 of prokaryotic cells caused by viral multiplication during the lytic cycle. We speculate 32 that viruses destroying bacteria regulate symbiont numbers in the bryozoan hosts, a 33 phenomenon known in some insects. We develop two hypotheses explaining exo-and 34 endogenous circulation of the viruses during the life-cycle of B. neritina. Finally, we 35 compare unusual 'sea-urchin'-like structures found in the collapsed bacteria in P. 36 sinuosa with so-called metamorphosis associated complexes (MACs) known to trigger 37 larval metamorphosis in a polychaete worm. 38 39 Importance 40 Complex symbiotic systems, including metazoan hosts, their bacterial symbionts and 41 bacteriophages are widely studied using vertebrate models whereas much less is 42 known about invertebrates. Our ultrastructural research revealed replication of the 43 viruses and/or activation of virus related elements in the bacterial symbionts inhabiting 44 tissues of the marine colonial invertebrates (phylum Bryozoa). The virus activity in the 45 bacterial cells that are believed to be transmitted exclusively vertically is of a special 46 importance. In addition, in the bacterial symbionts of one of the bryozoan hosts we 47 observed the massive replication of the structures seemingly related to the 48 Metamorphosis associated complexes (MAC). To our knowledge, MACs were never 49 reported in the animal prokaryotic symbionts. Our findings indicate that Bryozoa may be 50 new suitable model to study the role of bacteriophages and phage-related structures in 51 the complex symbiotic systems hosted by marine invertebrates.52 3In the marine realm, the large variety of viruses are found across diverse taxa, 78 including protists and various invertebrates such as sponges, cnidarians, flatworms, 79 polychaetes, mollusks, crustaceans and echinoderms (reviewed in Johnson

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Virus-like particles in Urastoma cyprinae, a turbellarian parasite of Mytilus galloprovincialis

Cited by 7 publications

References 13 publications

Pathologies in commercial bivalve species from Santa Catarina State, southern Brazil

Pathologies in commercial bivalve species from Santa Catarina State, southern Brazil

First evidence of virus-like particles in the bacterial symbionts of Bryozoa

First evidence of virus-like particles in the bacterial symbionts of Bryozoa

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