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https://www.readbyqxmd.com/read/27921219/nationwide-scorpion-exposures-reported-to-us-poison-control-centers-from-2005-to-2015
#1
A Min Kang, Daniel E Brooks
INTRODUCTION: Previous studies of scorpion envenomation in the United States (US) have focused on Arizona and the bark scorpion, Centruroides sculpturatus. Although many other scorpion species live in the US, information about envenomations in other states is lacking. METHODS: Nationwide scorpion exposures from 2005 to 2015 were analyzed using the National Poison Data System. RESULTS: Of the 185,402 total exposures, Arizona (68.2%), Texas (10...
December 5, 2016: Journal of Medical Toxicology: Official Journal of the American College of Medical Toxicology
https://www.readbyqxmd.com/read/27917162/activity-of-scorpion-venom-derived-antifungal-peptides-against-planktonic-cells-of-candida-spp-and-cryptococcus-neoformans-and-candida-albicans-biofilms
#2
Fernanda Guilhelmelli, Nathália Vilela, Karina S Smidt, Marco A de Oliveira, Alice da Cunha Morales Álvares, Maria C L Rigonatto, Pedro H da Silva Costa, Aldo H Tavares, Sônia M de Freitas, André M Nicola, Octávio L Franco, Lorena da Silveira Derengowski, Elisabeth F Schwartz, Márcia R Mortari, Anamélia L Bocca, Patrícia Albuquerque, Ildinete Silva-Pereira
The incidence of fungal infections has been increasing in the last decades, while the number of available antifungal classes remains the same. The natural and acquired resistance of some fungal species to available therapies, associated with the high toxicity of these drugs on the present scenario and makes an imperative of the search for new, more efficient and less toxic therapeutic choices. Antimicrobial peptides (AMPs) are a potential class of antimicrobial drugs consisting of evolutionarily conserved multifunctional molecules with both microbicidal and immunomodulatory properties being part of the innate immune response of diverse organisms...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27914892/straightforward-approach-to-produce-recombinant-scorpion-toxins-pore-blockers-of-potassium-channels
#3
Oksana Nekrasova, Ksenia Kudryashova, Arkadiy Fradkov, Sergey Yakimov, Maria Savelieva, Mikhail Kirpichnikov, Alexey Feofanov
Scorpion venom peptide blockers (KTx) of potassium channels are a valuable tool for structure-functional studies and prospective candidates for medical applications. Low yields of recombinant KTx hamper their wide application. We developed convenient and efficient bioengineering approach to a large-scale KTx production that meets increasing demands for such peptides. Maltose-binding protein was used as a carrier for cytoplasmic expression of folded disulfide-rich KTx in E. coli. TEV protease was applied for in vitro cleavage of the target peptide from the carrier...
November 30, 2016: Journal of Biotechnology
https://www.readbyqxmd.com/read/27914888/the-first-report-on-transcriptome-analysis-of-the-venom-gland-of-iranian-scorpion-hemiscorpius-lepturus
#4
Fatemeh Kazemi-Lomedasht, Vahid Khalaj, Kamran Pooshang Bagheri, Mahdi Behdani, Delavar Shahbazzadeh
Hemiscorpius lepturus scorpion is one of the most venomous members of the Hemiscorpiidae family. H. lepturus is distributed in Iran, Iraq and Yemen. The prevalence and severity of scorpionism is high and health services are not able to control it. Scorpionism in Iran especially in the southern regions (Khuzestan, Sistan and Baluchestan, Hormozgan, Ilam) is one of the main health challenges. Due to the medical and health importance of scorpionism, the focus of various studies has been on the identification of H...
November 30, 2016: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/27912864/clinical-and-epidemiological-aspects-of-scorpionism-in-the-world-a-systematic-review
#5
REVIEW
Maria S V Santos, Cláudio G L Silva, Basílio Silva Neto, Cícero R P Grangeiro Júnior, Victor H G Lopes, Antônio G Teixeira Júnior, Deryk A Bezerra, João V C P Luna, Josué B Cordeiro, Jucier Gonçalves Júnior, Marcos A P Lima
OBJECTIVE: Scorpion stings are registered worldwide, but the incidence and the features of the envenomations vary depending on the region. The aim of this review was to summarize the epidemiological, clinical, diagnostic, and therapeutic data worldwide regarding humans stung by scorpions. METHODS: A systematic review of the literature was conducted through the online databases of the Virtual Health Library (VHL), which hosts Medline and the Latin American and Caribbean Center on Health Sciences Informational (LILACS) database...
December 2016: Wilderness & Environmental Medicine
https://www.readbyqxmd.com/read/27912176/novel-designed-vmct1-analogs-with-increased-antimicrobial-activity
#6
Cibele Nicolaski Pedron, Marcelo Der Torossian Torres, Julia Aparecida da Silva Lima, Pedro Ismael Silva, Fernanda Dias Silva, Vani Xavier Oliveira
Antimicrobial peptides are biologically active molecules produced by a wide range of organisms as an essential component of the innate immune response. They have recently attracted great interest, since they have antimicrobial activity against a broad spectrum of microorganisms. VmCT1 is a cationic peptide from the venom of Vaejovis mexicanus smithi scorpions, which presents antibacterial activity and tends to helical structures. Its analogs were synthesized, characterized and the conformational studies were performed by circular dichroism...
November 24, 2016: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/27908665/diffuse-resistance-courtship-in-the-scorpion-rhopalurus-rochai-scorpiones-buthidae
#7
Shayanne Chantall-Rocha, Hilton F Japyassú
Male-female courtship signals are frequently subject to arms races, with patterns of behaviour evolving reciprocally to manipulate the reproductive output. Female resistance should be particularly effective when asymmetrical offspring care occurs under low and unpredictable resource distribution, because this would increase maternal costs. Our hypothesis is that under these conditions females will evolve diffuse mating strategies to avoid predictable exploitation by male optimal counter tactics. Mating in scorpions is a complex process, and female resistance occurs through specific behaviours...
November 28, 2016: Behavioural Processes
https://www.readbyqxmd.com/read/27900054/scorpion-venoms-in-gastric-cancer
#8
Xiao-Ying Zhang, Pei-Ying Zhang
Venom secretions from snakes, scorpions, spiders and bees, have been widely applied in traditional medicine and current biopharmaceutical research. Possession of anticancer potential is another novel discovery for animal venoms and toxins. An increasing number of studies have shown the anticancer effects of venoms and toxins of snakes, and scorpions in vitro and in vivo, which were achieved mainly through the inhibition of cancer growth, arrest of cell cycle, induction of apoptosis and suppression of cancer metastasis...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27891163/the-visual-system-of-harvestmen-opiliones-arachnida-chelicerata-a-re-examination
#9
Tobias Lehmann, Eva Lodde-Bensch, Roland R Melzer, Martina Metz
BACKGROUND: The visual systems in chelicerates are poorly understood, even though they show strong variation in eye and visual neuropil architecture, thus may provide valuable insights for the understanding of chelicerate phylogeny and eye evolution. Comparable morphological characters are desperately sought for reconstructions of the phylogeny of Chelicerata, especially with respect to Arachnida. So far, reliable data exist only for Pycnogonida, Xiphosura, Scorpiones, and Araneae. The few earlier studies of the organisation of the visual system in harvestmen are contradictory concerning the number, morphology, and position of the visual neuropils...
2016: Frontiers in Zoology
https://www.readbyqxmd.com/read/27889600/comparative-proteomic-analysis-of-female-and-male-venoms-from-the-mexican-scorpion-centruroides-limpidus-novel-components-found
#10
Jimena Isaias Cid Uribe, Juana Maria Jiménez Vargas, Cesar Vicente Ferreira Batista, Fernando Zamudio Zuñiga, Lourival Domingos Possani
Venom from male and female scorpions of the species Centruroides limpidus were separated by HPLC and their molecular masses determined by mass spectrometry. The relative concentration of components eluting in equivalent retention times from the HPLC column shows some differences. A new peptide with 29 amino acids, cross-linked by three disulfide bonds was found in male scorpions and its structure determined. Another unknown peptide present in female venom, with sequence identity similar to K(+)-channel blocking peptide was isolated...
November 24, 2016: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/27886129/insights-into-the-hypertensive-effects-of-tityus-serrulatus-scorpion-venom-purification-of-an-angiotensin-converting-enzyme-like-peptidase
#11
Daniela Cajado-Carvalho, Alexandre Kazuo Kuniyoshi, Bruno Duzzi, Leo Kei Iwai, Úrsula Castro de Oliveira, Inácio de Loiola Meirelles Junqueira de Azevedo, Roberto Tadashi Kodama, Fernanda Vieira Portaro
The number of cases of envenomation by scorpions has grown significantly in Brazil since 2007, with the most severe cases being caused by the Tityus serrulatus scorpion. Although envenomed patients mostly suffer neurotoxic manifestations, other symptoms, such as hypertension, cannot be exclusively attributed to neurotoxins. Omics analyses have detected plentiful amounts of metalloproteases in T. serrulatus venom. However, the roles played by these enzymes in envenomation are still unclear. Endeavoring to investigate the functions of scorpion venom proteases, we describe here for the first time an Angiotensin I-Converting Enzyme-like peptidase (ACE-like) purified from T...
November 24, 2016: Toxins
https://www.readbyqxmd.com/read/27876931/the-prevalence-of-non-indigenous-parasitic-copepod-neoergasilus-japonicus-spreads-with-fishes-of-pet-trade-in-kerman-iran
#12
Mohammad Mirzaei, Hosein Khovand, Reza Kheirandish
Ergasilids are copepods living in the river mouth of freshwaters and parasitic on Teleost fish family in both natural and artificial environments. So far, 5 species of the copepod have been discovered that belong to the genus Neoergasilus. This copepod is most likely to be disseminated through aquarium trades, aquaculture and over-nutrition, or construction of sand carrying water. The females of Ergasilidae are external parasites attaching to the anal and dorsal fins and sometimes to gills and nasal cavities of fish living in freshwaters...
December 2016: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/27873007/difference-in-capsaicinoid-biosynthesis-gene-expression-in-the-pericarp-reveals-elevation-of-capsaicinoid-contents-in-chili-peppers-capsicum-chinense
#13
Yoshiyuki Tanaka, Fumihiro Nakashima, Erasmus Kirii, Tanjuro Goto, Yuichi Yoshida, Ken-Ichiro Yasuba
This research reveals that the up-regulated expression of multiple capsaicinoid biosynthetic genes in pericarp tissue leads to the elevation of total capsaicinoid content in chili pepper fruit. Capsaicinoids are health-functional compounds that are produced uniquely in chili pepper fruits. A high capsaicinoid level is one of the major parameters determining the commercial quality and health-promoting properties of chili peppers. To investigate the mechanisms responsible for its high contents, we compared an extremely pungent cultivar 'Trinidad Moruga Scorpion Yellow' (MY) with other cultivars of different pungency levels (Fushimi-amanaga, Takanotsume, Red Habanero)...
November 21, 2016: Plant Cell Reports
https://www.readbyqxmd.com/read/27871874/functional-and-immuno-reactive-characterization-of-a-previously-undescribed-peptide-from-the-venom-of-the-scorpion-centruroides-limpidus
#14
Timoteo Olamendi-Portugal, Rita Restano-Cassulini, Lidia Riaño-Umbarila, Baltazar Becerril, Lourival D Possani
A previously undescribed toxic peptide named Cl13 was purified from the venom of the Mexican scorpion Centruroides limpidus. It contains 66 amino acid residues, including four disulfide bonds. The physiological effects assayed in 7 different subtypes of voltage gated Na(+)-channels, showed that it belongs to the β-scorpion toxin type. The most notorious effects were observed in subtypes Nav1.4, Nav1.5 and Nav1.6. Although having important sequence similarities with two other lethal toxins from this scorpion species (Cll1m and Cll2), the recently developed single chain antibody fragments (scFv) of human origin were not capable of protecting against Cl13...
November 18, 2016: Peptides
https://www.readbyqxmd.com/read/27869422/-scorpionism-in-children-in-tucum%C3%A3-n-descriptive-analysis-of-cases-in-a-second-level-of-complexity-hospital
#15
Mauricio R Ezquer, Manuel Villarreal, Javier Muntaner
Scorpionism in Tucumán is very frequent. The aim is to describe the clinical and epidemiological characteristics of cases of scorpionism that were seen in the Emergency Department of Eva Perón Hospital, Banda del Río Salí, Tucumán, between July 2013 and March 2015. Forty patients were assisted, 21 boys and 19 girls. The average age was 6.89 years. Thirty four (85%) resultedmild, 3 (7.5%) moderated, 3 (7.5%) moderated-severe. Hands (22.6%) and feet (20%) were the places in the body where the stings were more frequently localized...
December 1, 2016: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/27866407/forecasting-and-prediction-of-scorpion-sting-cases-in-biskra-province-algeria-using-a-seasonal-autoregressive-integrated-moving-average-model
#16
Schehrazad Selmane, Mohamed L'Hadj
OBJECTIVES: The aims of this study were to highlight some epidemiological aspects of scorpion envenomations, to analyse and interpret the available data for Biskra province, Algeria, and to develop a forecasting model for scorpion sting cases in Biskra province, which records the highest number of scorpion stings in Algeria. METHODS: In addition to analysing the epidemiological profile of scorpion stings that occurred throughout the year 2013, we used the Box-Jenkins approach to fit a seasonal autoregressive integrated moving average (SARIMA) model to the monthly recorded scorpion sting cases in Biskra from 2000 to 2012...
2016: Epidemiology and Health
https://www.readbyqxmd.com/read/27863510/establishing-a-reference-array-for-the-cs-%C3%AE-%C3%AE-superfamily-of-defensive-peptides
#17
D Ellen K Tarr
BACKGROUND: "Invertebrate defensins" belong to the cysteine-stabilized alpha-beta (CS-αβ), also known as the scorpion toxin-like, superfamily. Some other peptides belonging to this superfamily of defensive peptides are indistinguishable from "defensins," but have been assigned other names, making it unclear what, if any, criteria must be met to qualify as an "invertebrate defensin." In addition, there are other groups of defensins in invertebrates and vertebrates that are considered to be evolutionarily unrelated to those in the CS-αβ superfamily...
November 18, 2016: BMC Research Notes
https://www.readbyqxmd.com/read/27863128/one-component-aluminium-heteroscorpionate-catalysts-for-the-formation-of-cyclic-carbonates-from-epoxides-and-carbon-dioxide
#18
Agustín Lara-Sánchez, Javier Marínez, José A Castro-Osma, Carlos Alonso-Moreno, Antonio Rodríguez-Diéguez, Michael North, Antonio Otero
New neutral and zwitterionic chiral NNO-donor scorpionate ligands (1 and 2) have been designed to obtain new mononuclear and dinuclear NNO-heteroscorpionate aluminium complexes. Reaction of 1 with [AlR3] (R = Me, Et) in a 1:1 or 1:2 molar ratio afforded the neutral mononuclear alkyl complexes [AlR2(2-bpzappe)], R = Me (3), Et (4) and bimetallic complexes [{AlR2(2-bpzappe)}(µ-O){AlR3}], R = Me (5), Et (6). By reaction of complexes (36) with PhCH2Br, mononuclear and dinuclear zwitterionic aluminium complexes [AlR2(2-bbpzappe)]Br, R = Me (7), Et (8), and [{AlR2(2-bbpzappe)}(µ-O){AlR3}]Br, R = Me (9), Et (10), were synthesised...
November 10, 2016: ChemSusChem
https://www.readbyqxmd.com/read/27861683/-hospitalizations-due-to-external-causes-involving-contact-with-animals-in-a-general-hospital-in-the-interior-of-bahia-state-brazil-2009-2011
#19
Érica Assunção Carmo, Adriana Alves Nery, Cleber Souza de Jesus, Cezar Augusto Casotti
OBJECTIVE: to describe the characteristics of hospitalizations due to external causes involving contact with animals in a general hospital in the interior of Bahia State (BA), Brazil, from 2009 to 2011. METHODS: this was a descriptive study using data on hospital admissions in Jequié-BA. RESULTS: there were 246 admissions owing to accidents involving contact with animals, especially venomous ones (83.3% snake venom, and 6.5% scorpion venom); most involved male victims (66...
January 2016: Epidemiologia e Servicos de Saude: Revista do Sistema Unico de Saude do Brasil
https://www.readbyqxmd.com/read/27845058/identification-of-the-immunogenic-epitopes-of-the-whole-venom-component-of-the-hemiscorpius-lepturus-scorpion-using-the-phage-display-peptide-library
#20
Roghaye Jahdasani, Fatemeh Rahimi Jamnani, Mahdi Behdani, Mahdi Habibi-Anbouhi, Najmeh Yardehnavi, Delavar Shahbazzadeh, Fatemeh Kazemi-Lomedasht
The venom of the Hemiscorpius lepturus scorpion contains mixtures of bioactive compounds that disturb biochemical and physiological functions of the victims. Hemiscorpius lepturus envenomation is recognized as a serious health concern in tropical regions. So far, there is no preventive procedure, and the main focus is on treatment of victims with an antiserum purified from hyper-immunized horses. Although antisera can neutralize the venom, they, in some cases, lead to anaphylactic shock and even death. Selection of peptides mimicking antigenic and immunogenic epitopes of toxins from random peptide libraries is a novel approach for the development of recombinant toxins and poly-epitopic vaccine...
December 15, 2016: Toxicon: Official Journal of the International Society on Toxinology
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