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https://www.readbyqxmd.com/read/29446223/evolution-and-development-of-scyphozoan-jellyfish
#1
Rebecca R Helm
Scyphozoan jellyfish, or scyphomedusae, are conspicuous members of many ocean ecosystems, and have large impacts on human health and industry. Most scyphomedusae are the final stage in a complex life cycle that also includes two intermediate stages: the larval planula and benthic polyp. In species with all three life-cycle stages, the metamorphosis of a polyp into a juvenile scyphomedusa (ephyra) is termed strobilation, and polyps can produce one ephyra (termed monodisc strobilation) or many ephyrae (termed polydisc strobilation)...
February 14, 2018: Biological Reviews of the Cambridge Philosophical Society
https://www.readbyqxmd.com/read/29444861/interacting-heads-motif-has-been-conserved-as-a-mechanism-of-myosin-ii-inhibition-since-before-the-origin-of-animals
#2
Kyoung Hwan Lee, Guidenn Sulbarán, Shixin Yang, Ji Young Mun, Lorenzo Alamo, Antonio Pinto, Osamu Sato, Mitsuo Ikebe, Xiong Liu, Edward D Korn, Floyd Sarsoza, Sanford I Bernstein, Raúl Padrón, Roger Craig
Electron microscope studies have shown that the switched-off state of myosin II in muscle involves intramolecular interaction between the two heads of myosin and between one head and the tail. The interaction, seen in both myosin filaments and isolated molecules, inhibits activity by blocking actin-binding and ATPase sites on myosin. This interacting-heads motif is highly conserved, occurring in invertebrates and vertebrates, in striated, smooth, and nonmuscle myosin IIs, and in myosins regulated by both Ca 2+ binding and regulatory light-chain phosphorylation...
February 14, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29442315/cnidarian-zic-genes
#3
Michael J Layden
To understand the ancestral and evolved roles of zic homologs, it is important to reconstruct the putative roles of ancient zic homologs in the animal phylogeny. Most studies of zic genes have been conducted in model systems that are members of the bilaterian phylum. However, two additional phyla have zic homologs encoded in their genomes. The three animal phyla that contain zic homologs all share a common ancestor and collectively are termed the parahoxozoans (cnidarians (corals, sea anemones, and jellyfish), placozoans (Trichoplax adhaerens), and bilaterians (chordates, insects, nematodes, annelids, echinoderms, etc...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29434219/nemopilema-nomurai-jellyfish-venom-exerts-an-anti-metastatic-effect-by-inhibiting-smad-and-nf-%C3%AE%C2%BAb-mediated-epithelial-mesenchymal-transition-in-hepg2-cells
#4
Hyunkyoung Lee, Min Jung Pyo, Seong Kyeong Bae, Yunwi Heo, Indu Choudhary, Duhyeon Hwang, Hyeryeon Yang, Je-Hein Kim, Jinho Chae, Chang Hoon Han, Changkeun Kang, Seungshic Yum, Euikyung Kim
Epithelial-mesenchymal transition (EMT) is a key initial step in metastasis for malignant cancer cells to obtain invasive and motile properties. Inhibiting EMT has become a new strategy for cancer therapy. In our previous in vivo study, Nemopilema nomurai jellyfish venom (NnV) -treated HepG2 xenograft mice group showed that E-cadherin expression was strongly detected compared with non-treated groups. Therefore, this study aimed to determine whether NnV could inhibit the invasive and migratory abilities of HepG2 human hepatocellular carcinoma cells and to examine its effect on EMT...
February 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29427249/prefoldin-a-jellyfish-like-molecular-chaperone-functional-cooperation-with-a-group-ii-chaperonin-and-beyond
#5
REVIEW
Muhamad Sahlan, Tamotsu Zako, Masafumi Yohda
Prefoldin is a hexameric molecular chaperone found in the cytosol of archaea and eukaryotes. Its hexameric complex is built from two related classes of subunits and has the appearance of a jellyfish: its body consists of a double beta-barrel assembly with six long tentacle-like coiled coils protruding from it. Using the tentacles, prefoldin captures an unfolded protein substrate and transfers it to a group II chaperonin. The prefoldin-group II chaperonin system is thought to be important for the folding of newly synthesized proteins and for their maintenance, or proteostasis, in the cytosol...
February 9, 2018: Biophysical Reviews
https://www.readbyqxmd.com/read/29426422/improved-collagen-extraction-from-jellyfish-acromitus-hardenbergi-with-increased-physical-induced-solubilization-processes
#6
Nicholas M H Khong, Fatimah Md Yusoff, B Jamilah, Mahiran Basri, I Maznah, Kim Wei Chan, Nurdin Armania, Jun Nishikawa
Efficiency and effectiveness of collagen extraction process contribute to huge impacts to the quality, supply and cost of the collagen produced. Jellyfish is a potential sustainable source of collagen where their applications are not limited by religious constraints and threats of transmittable diseases. The present study compared the extraction yield, physico-chemical properties and toxicology in vitro of collagens obtained by the conventional acid-assisted and pepsin-assisted extraction to an improved physical-aided extraction process...
June 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29423370/jellyfish-ingestion-was-safe-for-patients-with-crustaceans-cephalopods-and-fish-allergy
#7
Luís Amaral, António Raposo, Zilda Morais, Alice Coimbra
No abstract text is available yet for this article.
January 2018: Asia Pacific Allergy
https://www.readbyqxmd.com/read/29410055/jellyfish-collagen-a-new-allergen-in-the-beach
#8
José Antonio Cañas, José Manuel Rodrigo-Muñoz, Stalyn Humberto Rondon-Cepeda, Cesar Bordehore, Mar Fernández-Nieto, Victoria Del Pozo
No abstract text is available yet for this article.
February 1, 2018: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/29389121/an-anti-inflammatory-ppar-%C3%AE-agonist-from-the-jellyfish-derived-fungus-penicillium-chrysogenum-j08nf-4
#9
Sen Liu, Mingzhi Su, Shao-Jiang Song, Jongki Hong, Hae Young Chung, Jee H Jung
An investigation of the jellyfish-derived fungus Penicillium chrysogenum J08NF-4 led to the isolation of two new meroterpene derivatives, chrysogenester (1) and 5-farnesyl-2-methyl-1-O-methylhydroquinone (2), and four known farnesyl meroterpenes. Docking analysis of 1 showed that it binds to PPAR-γ in the same manner as the natural PPAR-γ agonist amorfrutin B (7). Compound 1 activated PPAR-γ in murine Ac2F liver cells and increased nuclear PPAR-γ protein levels in murine RAW 264.7 macrophages. Because one of the main biological functions of PPAR-γ agonists is to suppress inflammatory response, an in vitro study was performed to explore the anti-inflammatory potency of 1 and the mechanism involved...
February 1, 2018: Journal of Natural Products
https://www.readbyqxmd.com/read/29384596/eating-jellyfish-safety-chemical-and-sensory-properties
#10
António Raposo, Alice Coimbra, Luís Amaral, Amparo Gonçalves, Zilda Morais
BACKGROUND: People's preference for fish with a high trophic level, like Atlantic cod and tuna, leads to a large food footprint. Responsible seafood consumption should include underutilised local products; hence the culinary use of edible jellyfish can be an effective contribution. The present work focused on Catostylus tagi to contribute to the consumption of edible jellyfish in the west. RESULTS: A questionnaire conducted with 192 young people showed an interest in tasting jellyfish-based food (64...
January 31, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29373572/intraspecific-variation-in-oxidative-stress-tolerance-in-a-model-cnidarian-differences-in-peroxide-sensitivity-between-and-within-populations-of-nematostella-vectensis
#11
Lauren E Friedman, Thomas D Gilmore, John R Finnerty
Nematostella vectensis is a member of the phylum Cnidaria, a lineage that includes anemones, corals, hydras, and jellyfishes. This estuarine anemone is an excellent model system for investigating the evolution of stress tolerance because it is easy to collect in its natural habitat and to culture in the laboratory, and it has a sequenced genome. Additionally, there is evidence of local adaptation to environmental stress in different N. vectensis populations, and abundant protein-coding polymorphisms have been identified, including polymorphisms in proteins that are implicated in stress responses...
2018: PloS One
https://www.readbyqxmd.com/read/29358214/identification-of-jellyfish-neuropeptides-that-act-directly-as-oocyte-maturation-inducing-hormones
#12
Noriyo Takeda, Yota Kon, Gonzalo Quiroga Artigas, Pascal Lapébie, Carine Barreau, Osamu Koizumi, Takeo Kishimoto, Kazunori Tachibana, Evelyn Houliston, Ryusaku Deguchi
Oocyte meiotic maturation is crucial for sexually reproducing animals, and its core cytoplasmic regulators are highly conserved between species. By contrast, the few known maturation-inducing hormones (MIHs) that act on oocytes to initiate this process are highly variable in their molecular nature. Using the hydrozoan jellyfish species Clytia and Cladonema, which undergo oocyte maturation in response to dark-light and light-dark transitions, respectively, we deduced amidated tetrapeptide sequences from gonad transcriptome data and found that synthetic peptides could induce maturation of isolated oocytes at nanomolar concentrations...
January 22, 2018: Development
https://www.readbyqxmd.com/read/29355106/shedding-light-on-spawning-in-jellyfish
#13
Laurinda A Jaffe
An opsin receptor has a central role in the production and release of eggs by female jellyfish.
January 22, 2018: ELife
https://www.readbyqxmd.com/read/29350092/focus-on-the-target-angiographic-features-of-the-fistulous-point-and-prognosis-of-transvenous-embolization-of-cavernous-sinus-dural-arteriovenous-fistula
#14
Hui Guo, QianKun Yin, Peng Liu, Ning Guan, Xiaochuan Huo, Youxiang Li
Background and purpose Transvenous embolization (TVE) is widely utilized as an effective and safe treatment option for cavernous sinus dural arteriovenous fistula (CS-dAVF); however, detecting the exact location of the fistula is challenging. The present study identified the angiographic features of the fistulous point and evaluated the match with the microcatheter tip and fistulous point. Materials and methods An analysis cohort of 45 consecutive patients with CS-dAVF treated by TVE was analyzed retrospectively...
January 1, 2018: Interventional Neuroradiology
https://www.readbyqxmd.com/read/29349786/acute-lion-s-mane-jellyfish-cyanea-capillata-cnideria-scyphozoa-exposure-to-atlantic-salmon-salmo-salar-l
#15
M D Powell, Å Åtland, T Dale
Jellyfish-induced gill pathology relies upon occasional diagnostic observations yet the extent and impact of jellyfish blooms on aquaculture may be significant. Idiopathic gill lesions are often observed in apparently healthy fish. This study exposed Atlantic salmon (Salmo salar L.) smolts to macerated Cyanea capillata at 2.5 and 5 g/L for 2 hr under controlled laboratory conditions. Blood chemistry and gill histopathology were examined over a subsequent 4-week period. Fish showed an acute response to the presence of jellyfish, including characteristic external "whiplash" discoloration of the skin and acute increases in blood electrolytes and CO2 concentration; however, these were resolved within 4 days after exposure...
January 18, 2018: Journal of Fish Diseases
https://www.readbyqxmd.com/read/29303958/separation-and-characterization-of-antioxidative-and-angiotensin-converting-enzyme-inhibitory-peptide-from-jellyfish-gonad-hydrolysate
#16
Qin Zhang, Chengcheng Song, Jun Zhao, Xiaomei Shi, Meiling Sun, Jing Liu, Yinghuan Fu, Wengang Jin, Beiwei Zhu
The gonad of jellyfish (RhopilemaesculentumKishinouye), containing high protein content with a rich amino acid composition, is suitable for the preparation of bioactive peptides. Jellyfish gonad was hydrolysed with neutral protease to obtain jellyfish gonad protein hydrolysate (JGPH), which was then purified sequentially by ultrafiltration, gel filtration chromatography, and RP-HPLC. The peptides were characterized with HPLC-MS/MS. One peptide with amino acid sequence Ser-Tyr (SY) was identified and synthesized, which showed good ACE inhibitory and antioxidant activity...
January 5, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29303477/a-gonad-expressed-opsin-mediates-light-induced-spawning-in-the-jellyfish-clytia
#17
Gonzalo Quiroga Artigas, Pascal Lapébie, Lucas Leclère, Noriyo Takeda, Ryusaku Deguchi, Gáspár Jékely, Tsuyoshi Momose, Evelyn Houliston
Across the animal kingdom, environmental light cues are widely involved in regulating gamete release, but the molecular and cellular bases of the photoresponsive mechanisms are poorly understood. In hydrozoan jellyfish, spawning is triggered by dark-light or light-dark transitions acting on the gonad, and is mediated by oocyte maturation-inducing neuropeptide hormones (MIHs) released from the ectoderm. We determined in Clytia hemisphaerica that blue-cyan light triggers spawning in isolated gonads. A candidate opsin (Opsin9) was found co-expressed with MIH within specialised ectodermal cells...
January 5, 2018: ELife
https://www.readbyqxmd.com/read/29291125/jellyfish-on-the-menu-mtdna-assay-reveals-scyphozoan-predation-in-the-irish-sea
#18
Philip D Lamb, Ewan Hunter, John K Pinnegar, Simon Creer, Richard G Davies, Martin I Taylor
Localized outbreaks of jellyfish, known as blooms, cause a variety of adverse ecological and economic effects. However, fundamental aspects of their ecology remain unknown. Notably, there is scant information on the role jellyfish occupy in food webs: in many ecosystems, few or no predators are known. To identify jellyfish consumers in the Irish Sea, we conducted a molecular gut content assessment of 50 potential predators using cnidarian-specific mtDNA primers and sequencing. We show that jellyfish predation may be more common than previously acknowledged: uncovering many previously unknown jellyfish predators...
November 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/29290624/acid-tolerant-monomeric-gfp-from-olindias-formosa
#19
Hajime Shinoda, Yuanqing Ma, Ryosuke Nakashima, Keisuke Sakurai, Tomoki Matsuda, Takeharu Nagai
The fluorescent protein (FP) color palette has greatly contributed to the visualization of molecular and cellular processes. However, most FPs lose fluorescence at a pH lower than their neutral pKa (∼6), and this has hampered their application in acidic organelles (pH ∼4.5-6.0). Currently, several cyan- and red-colored acid-tolerant FPs are available; however, there are few reports of acid-tolerant green FPs (GFPs) that are practically applicable to bioimaging. Here, we developed the acid-tolerant monomeric GFP "Gamillus" from the jellyfish Olindias formosa, with excellent brightness, maturation speed, and photostability...
December 23, 2017: Cell Chemical Biology
https://www.readbyqxmd.com/read/29285938/novel-kunitz-like-peptides-discovered-in-the-zoanthid-palythoa-caribaeorum-through-transcriptome-sequencing
#20
Qiwen Liao, Shengnan Li, Shirley Weng In Siu, Binrui Yang, Chen Huang, Judy Yuet-Wa Chan, Jean-Étienne Morlighem, Clarence Tsun Ting Wong, Gandhi Radis-Baptista, Simon Ming-Yuen Lee
Palythoa caribaeorum (class Anthozoa) is a zoanthid that together jellyfishes, hydra, and sea anemones, which are venomous and predatory, belongs to the Phyllum Cnidaria. The distinguished feature in these marine animals is the cnidocytes in the body tissues, responsible for toxin production and injection that are used majorly for prey capture and defense. With exception for other anthozoans, the toxin cocktails of zoanthids have been scarcely studied and are poorly known. Here, based on the analysis of P. caribaeorum transcriptome, numerous predicted venom-featured polypeptides were identified, including allergens, neurotoxins, membrane-active and Kunitz-like peptides (PcKuz)...
December 29, 2017: Journal of Proteome Research
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