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https://www.readbyqxmd.com/read/29674882/-oculogryphus-chenghoiyanae-sp-n-coleoptera-lampyridae-a-new-ototretine-firefly-from-hong-kong-with-descriptions-of-its-bioluminescent-behavior-and-ultraviolet-induced-fluorescence-in-females
#1
Vor Yiu, Ming-Luen Jeng
The first Oculogryphus species with associated males and female was found in Hong Kong and is described as new: O. chenghoiyanae sp. n. Adults of both sexes were collected live in the field and their bioluminescent behavior is reported for the first time in the genus. The captive males emit weak and continuous light from a pair of light spots on abdominal ventrite 6 or do so when disturbed. The larviform (highly paedomorphic) females can glow brightly from a pair of light-emitting organs on the abdomen. The females of Oculogryphus and Stenocladius are to date the only documented representatives of paedomorphism in ototretine fireflies...
2018: ZooKeys
https://www.readbyqxmd.com/read/29666447/episodic-records-of-jellyfish-ingestion-of-plastic-items-reveal-a-novel-pathway-for-trophic-transference-of-marine-litter
#2
A Macali, A Semenov, V Venuti, V Crupi, F D'Amico, B Rossi, I Corsi, E Bergami
Invertebrates represent the most plentiful component of marine biodiversity. To date, only few species have been documented for marine litter intake. Here, we report for the first time the presence of macroplastic debris in a jellyfish species. Such novel target to plastic pollution highlights an under studied vector of marine litter along marine trophic web, raising further concern over the impact on marine wildlife.
April 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29603311/delayed-allergic-reactions-to-jellyfish-stings-usefulness-of-ultrasonographic-evaluation
#3
Priscila Giavedoni, Verónica Velasco, Daniel Morgado-Carrasco, Santiago Nogué, Jose Manuel Mascaró Galy
Jellyfish stings often cause immediate local skin reactions, and, less frequently, the affected individuals may develop delayed allergic reactions days or months after the sting. Here, we present 4 such cases. In all cases, color Doppler ultrasonography was performed at the time of diagnosis, and in 3 of the cases, clinical follow-ups with ultrasonographic evaluations were performed. Ultrasonography initially showed dermal thickening with decreased echogenicity that progressively normalized during follow-up...
March 30, 2018: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29570829/gonadal-histology-of-box-jellyfish-cnidaria-cubozoa-reveals-variation-between-internal-fertilizing-species-alatina-alata-alatinidae-and-copula-sivickisi-tripedaliidae
#4
Jimena García-Rodríguez, Cheryl Lewis Ames, José Eduardo A R Marian, Antonio Carlos Marques
Cubozoans (box jellyfish) are gonochoristic cnidarians with distinct reproductive strategies. This comparative histological study examines the gonad organization of Alatina alata and Copula sivickisi, two box jellyfish species that exhibit different modes of internal fertilization. A. alata reproduces via spermcasting aggregations while C. sivickisi reproduces via copulation; in both cases, internal fertilization occurs in the gastrovascular cavity. Herein, we provide the first histological description of subgastric sacs-structures unique to C...
March 23, 2018: Journal of Morphology
https://www.readbyqxmd.com/read/29570625/impact-of-scyphozoan-venoms-on-human-health-and-current-first-aid-options-for-stings
#5
REVIEW
Alessia Remigante, Roberta Costa, Rossana Morabito, Giuseppa La Spada, Angela Marino, Silvia Dossena
Cnidaria include the most venomous animals of the world. Among Cnidaria, Scyphozoa (true jellyfish) are ubiquitous, abundant, and often come into accidental contact with humans and, therefore, represent a threat for public health and safety. The venom of Scyphozoa is a complex mixture of bioactive substances-including thermolabile enzymes such as phospholipases, metalloproteinases, and, possibly, pore-forming proteins-and is only partially characterized. Scyphozoan stings may lead to local and systemic reactions via toxic and immunological mechanisms; some of these reactions may represent a medical emergency...
March 23, 2018: Toxins
https://www.readbyqxmd.com/read/29537083/adaptation-to-hypoxic-environments-bearded-gobies-sufflogobius-bibarbatus-in-the-benguela-upwelling-ecosystem
#6
A G V Salvanes, M J Gibbons
The oceans of the world are slowly losing oxygen, in part because of climate change and in part because of anthropogenic eutrophication. This deoxygenation affects marine organisms in species-specific ways. This paper reviews what is known on how hypoxia tolerant species respond to low dissolved oxygen, using the bearded goby Sufflogobius bibarbatus as a model system. This species is endemic to the Benguela upwelling ecosystem, where, off Namibia, 9000 km2 of the shelf is hypoxic. Here, the species is now considered central to ecosystem functioning and in recent decades it has sustained commercial fisheries...
March 2018: Journal of Fish Biology
https://www.readbyqxmd.com/read/29536838/-contact-with-jellyfish-led-to-intermittent-severe-hypertension
#7
Carina Kirstine Klarskov, Connie Bondo Dydensborg
Jellyfish is the number one cause of human pathologies due to contact with marine organisms. Jellyfish stings can cause a vast number of symptoms in humans like contact derma-titis, itching, pain, cardiovascular problems, anaphylaxis, and even death. This case report is about a 72-year-old woman with intermittent severe hypertension after being stung by jellyfish. Because of tourism and jellyfish migration the prevalence of patients with symptoms after jellyfish stings is increasing.
March 5, 2018: Ugeskrift for Laeger
https://www.readbyqxmd.com/read/29534027/biphasic-scaffolds-from-marine-collagens-for-regeneration-of-osteochondral-defects
#8
Anne Bernhardt, Birgit Paul, Michael Gelinsky
BACKGROUND: Collagens of marine origin are applied increasingly as alternatives to mammalian collagens in tissue engineering. The aim of the present study was to develop a biphasic scaffold from exclusively marine collagens supporting both osteogenic and chondrogenic differentiation and to find a suitable setup for in vitro chondrogenic and osteogenic differentiation of human mesenchymal stroma cells (hMSC). METHODS: Biphasic scaffolds from biomimetically mineralized salmon collagen and fibrillized jellyfish collagen were fabricated by joint freeze-drying and crosslinking...
March 13, 2018: Marine Drugs
https://www.readbyqxmd.com/read/29521032/collagen-from-marine-biological-sources-and-medical
#9
REVIEW
Fatuma Felix Felician, Chunlei Xia, Weiyan Qi, Hanmei Xu
Collagen is the most studied protein with a wide range of applications including pharmaceutical, biomedical, cosmetics, leather and film industries due to its special characteristics that are high biocompatibility, good bioactivity, and weak antigenicity. Although collagen sources are abundant, the outbreak of varied diseases among land animals posed threat to its utilization in our daily life. Thus, a probe for an alternative source began, which in turn revealed the immense untapped marine sources, such as fish, jellyfish, and some marine Mammals...
March 9, 2018: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/29518561/loss-of-metagenesis-and-evolution-of-a-parasitic-life-style-in-a-group-of-open-ocean-jellyfish
#10
Bastian Bentlage, Karen J Osborn, Dhugal J Lindsay, Russell R Hopcroft, Kevin A Raskoff, Allen G Collins
Loss or stark reduction of the free-swimming medusa or jellyfish stage is common in the cnidarian class Hydrozoa. In the hydrozoan clade Trachylina, however, many species do not possess a sessile polyp or hydroid stage. Trachylines inhabiting freshwater and coastal ecosystems (i.e., Limnomedusae) possess a metagenetic life cycle involving benthic, sessile polyp and free-swimming medusa. In contrast, the paradigm is that open ocean inhabiting, oceanic trachylines (in the orders Narcomedusae and Trachymedusae) develop from zygote to medusa via a free-swimming larva, forgoing the polyp stage...
March 5, 2018: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/29513832/anaphylactic-reaction-angioedema-associated-with-jellyfish-sting
#11
João Claudio Campos Pereira, David Szpilman, Vidal Haddad Junior
The most frequent jellyfish in Southern Brazil causes mainly local pain and skin plaques. A 3-year-old female bather presented an erythematous, irregular plaque on the left forearm after contact with a jellyfish and intense facial angioedema with facial flushing. The lungs had vesicular murmur, wheezes, and snorts, and pink and spumous secretion in the airways with intercostal retraction. She was administered subcutaneous adrenaline (0.1mg/kg) and hydrocortisone intravenous (10mg/kg) with total recovery in a few minutes...
January 2018: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/29500959/an-aqueous-extract-of-nomura-s-jellyfish-ameliorates-inflammatory-responses-in-lipopolysaccharide-stimulated-raw264-7-cells-and-a-zebrafish-model-of-inflammation
#12
Su Jung Hwang, Eun-Young Ahn, Youmie Park, Hyo-Jong Lee
The recent mass emergence of Nomura's jellyfish (Nemopilema nomurai) has caused much economic and environmental damage. However, there is no innovative strategy to dispose of or utilize these jellyfish. Some reports suggest that the jellyfish may be bioactive resources and a source of important compounds with antibacterial activity. Here, we examined the effect of an aqueous extract of Nomura's jellyfish (AENJ) on lipopolysaccharide (LPS)-stimulated Raw 264.7 macrophages and a zebrafish model of inflammation and analyzed the underlying molecular mechanisms...
February 28, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29469797/a-gastronomic-delight
#13
Livia Francine Soriano, Bernard Cummings, Victoria Jolliffe
Flagellate dermatitis (FD) exhibits a striking clinical appearance similar to whiplash marks. General dermatologists are likely to encounter this clinical appearance as a more localized presentation of phytophotodermatosis. Jellyfish stings may also cause localized linear or FD. Chemotherapeutic agents such as bleomycin, doxorubicin, docetaxel, and trastuzumab are well-recognized causes of a widespread FD and it may more rarely be seen in connective tissue disease such as dermatomyositis or Still disease. In our case, this was a presentation of shiitake mushroom dermatitis...
October 15, 2017: Dermatology Online Journal
https://www.readbyqxmd.com/read/29466636/-spatial-and-temporal-abundance-and-distribution-of-stomolophus-meleagris-rhizostomae-stomolophidae-in-a-lagoon-system-southern-gulf-of-mexico
#14
Francisco Javier Félix Torres, Arturo Garrido Mora, Yessenia Sánchez Alcudia, Alberto de Jesús Sánchez Martínez, Andrés Arturo Granados Berber, José Luis Ramos Palma
The scyphomedusae feed mainly on microscopic crustaceans, eggs and fish larvae, molluscs and some other jellyfishes. The distribution and abundance of the scyphomedusae has an economic and ecological impact as they are predators that have an influence on the population dynamics of other fisheries. This investigation took place in the lagoon system ‘Arrastradero-Redonda’, Tabasco, from September 2013 to August 2014, with the purpose to provide information on the distribution, and spatial and temporal abundance of Stomolophus meleagris; along with its relation to environmental parameters...
March 2017: Revista de Biología Tropical
https://www.readbyqxmd.com/read/29446223/evolution-and-development-of-scyphozoan-jellyfish
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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