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Taxonomic redescription of the Portuguese man-of-war, Physalia physalis (Cnidaria, Hydrozoa, Siphonophorae, Cystonectae) from Brazil Iheringia, Sér. Zool.
Bardi,Juliana; Marques,Antonio C..
Although Physalia physalis (Linnaeus, 1758) is widely known from the Brazilian waters, specimens from this coast were never properly described. We describe Brazilian specimens of P. physalis including information on morphology, cnidome, SEM, and histological studies. Taxonomical issues concerning the development of the colonies and eventual synonymy with Physalia utriculus (La Martinière, 1787) are also added.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cnidarian; Hydrozoan; Siphonophore; Pleuston; Systematics.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212007000400011
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An improved whole life cycle culture protocol for the hydrozoan genetic model Clytia hemisphaerica ArchiMer
Lechable, Marion; Jan, Anne-cecile; Duchene, Axel; Uveira, Julie; Weissbourd, Brandon; Gissat, Loann; Collet, Sophie; Gilletta, Laurent; Chevalier, Sandra; Leclère, Lucas; Peron, Sophie; Barreau, Carine; Lasbleiz, Régis; Houliston, Evelyn; Momose, Tsuyoshi.
The jellyfish species Clytia hemisphaerica (Cnidaria, Hydrozoa) has emerged as a new experimental model animal in the last decade. Favorable characteristics include a fully transparent body suitable for microscopy, daily gamete production and a relatively short life cycle. Furthermore, whole genome sequence assembly and efficient gene editing techniques using CRISPR/Cas9 have opened new possibilities for genetic studies. The quasi-immortal vegetatively-growing polyp colony stage provides a practical means to maintain mutant strains. In the context of developing Clytia as a genetic model, we report here an improved whole life cycle culture method including an aquarium tank system designed for culture of the tiny jellyfish form. We have compared different...
Tipo: Text Palavras-chave: Animal culture; Cnidarian; Developmental biology; Genetics; Jellyfish.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00656/76820/77996.pdf
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Implication of the host TGF beta pathway in the onset of symbiosis between larvae of the coral Fungia scutaria and the dinoflagellate Symbiodinium sp (clade C1f) ArchiMer
Berthelier, Jeremy; Schnitzler, Christine E.; Wood-charlson, Elisha M.; Poole, Angela Z.; Weis, Virginia M.; Detournay, Olivier.
Dinoflagellate-cnidarian associations form both the trophic and structural foundation of coral-reef ecosystems. Previous studies have highlighted the role of host innate immunity in regulation of these partnerships. This study reveals the presence of a transforming growth factor beta (TGF beta) in the coral Fungia scutaria that clusters with TGF beta sensu stricto (ss) from other animals. In functional studies of F. scutaria larvae, we show that (1) TGF beta ss mRNA is expressed during early stages of development prior to the onset of symbiosis; (2) apparent interference of the TGF beta pathway impairs the onset of symbiosis; and (3) this effect is associated with an increase of cytotoxic nitric oxide secretion, an immune response. This work highlights the...
Tipo: Text Palavras-chave: Transforming growth factor beta; Cnidarian; Coral bleaching; Dinoflagellate; Symbiodinium; Symbiosis.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00412/52389/56297.pdf
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Hemolytic, anticancer and antigiardial activity of Palythoa caribaeorum venom J. Venom. Anim. Toxins incl. Trop. Dis.
Lazcano-Pérez,Fernando; Zavala-Moreno,Ariana; Rufino-González,Yadira; Ponce-Macotela,Martha; García-Arredondo,Alejandro; Cuevas-Cruz,Miguel; Gómez-Manzo,Saúl; Marcial-Quino,Jaime; Arreguín-Lozano,Barbarín; Arreguín-Espinosa,Roberto.
Abstract Background Cnidarian venoms and extracts have shown a broad variety of biological activities including cytotoxic, antibacterial and antitumoral effects. Most of these studied extracts were obtained from sea anemones or jellyfish. The present study aimed to determine the toxic activity and assess the antitumor and antiparasitic potential of Palythoa caribaeorum venom by evaluating its in vitro toxicity on several models including human tumor cell lines and against the parasite Giardia intestinalis. Methods The presence of cytolysins and vasoconstrictor activity of P. caribaeorum venom were determined by hemolysis, PLA2 and isolated rat aortic ring assays, respectively. The cytotoxic effect was tested on HCT-15 (human colorectal adenocarcinoma),...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cnidarian; Palythoa caribaeorum; Cytotoxin; Antitumoral effect; Giardiasis.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992018000100306
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