keyword
MENU ▼
Read by QxMD icon Read
search

Scorpion

keyword
https://www.readbyqxmd.com/read/28209477/characterizing-the-biological-and-biochemical-profile-of-six-different-scorpion-venoms-from-the-buthidae-and-scorpionidae-family
#1
Sebastian Estrada-Gómez, Lyz Gomez-Rave, Leidy Vargas-Muñoz, Arie van der Meijden
The objective of this study was to characterize a selection of six different scorpion venoms using biological and biochemical methods, including a preliminary MS/MS and a post-translational modifications analysis. Despite the diversity of scorpion species of medical importance in Africa and Colombia, the venoms of these arachnids have been poorly studied in these two regions. We report the biochemical, electrophoretic, chromatographic profile, internal peptide sequences with a post-translational modification report, and a preliminary antitumor activity of five different scorpions of the Buthidae family, Androctonus amoreuxi, Babycurus jacksoni, Grosphus grandidieri, Hottentotta gentili and Tityus fuhrmanni, and one of the Scorpionidae family Pandinus imperator...
February 13, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28208885/study-on-distribution-of-scorpions-to-provide-prevention-and-interventions-in-combating-scorpionism-in-poldokhtar-county-lorestan-province-iran
#2
Mansour Nazari, Rastgar Hassan
INTRODUCTION: Scorpions are arthropods of medical importance classified in the class Arachnida, inhabiting hot and dry environments. All scorpions have a venomous sting and several thousand people die each year from scorpion stings, but this mortality is due to the venom of about 25 species located in northern Africa, the Middle East, India, Mexico and parts of South America. Poldokhtar County belongs to one of the southern cities of Lorestan Province, providing suitable habitats for many different species of scorpions due to its specific climatic conditions...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28202723/mapping-of-voltage-sensor-positions-in-resting-and-inactivated-mammalian-sodium-channels-by-lret
#3
Tomoya Kubota, Thomas Durek, Bobo Dang, Rocio K Finol-Urdaneta, David J Craik, Stephen B H Kent, Robert J French, Francisco Bezanilla, Ana M Correa
Voltage-gated sodium channels (Navs) play crucial roles in excitable cells. Although vertebrate Nav function has been extensively studied, the detailed structural basis for voltage-dependent gating mechanisms remain obscure. We have assessed the structural changes of the Nav voltage sensor domain using lanthanide-based resonance energy transfer (LRET) between the rat skeletal muscle voltage-gated sodium channel (Nav1.4) and fluorescently labeled Nav1.4-targeting toxins. We generated donor constructs with genetically encoded lanthanide-binding tags (LBTs) inserted at the extracellular end of the S4 segment of each domain (with a single LBT per construct)...
February 15, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28192687/corrigendum-to-the-first-report-on-transcriptome-analysis-of-the-venom-gland-of-iranian-scorpion-hemiscorpius-lepturus-toxicon-125-2017-123-130
#4
Elham Torabi, Saeme Asgari, Vahid Khalaj, Mahdi Behdani, Fatemeh Kazemi-Lomedasht, Kamran Pooshang Bagheri, Delavar Shahbazzadeh
No abstract text is available yet for this article.
February 10, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28181330/discrete-and-morphometric-traits-reveal-contrasting-patterns-and-processes-in-the-macroevolutionary-history-of-a-clade-of-scorpions
#5
Nicolas Mongiardino Koch, F Sara Ceccarelli, Andrés A Ojanguren-Affilastro, Martín J Ramírez
Many paleontological studies have investigated the evolution of entire body plans, generally relying on discrete character-taxon matrices. In contrast, macroevolutionary studies performed by neontologists have mostly focused on morphometric traits. Although these data types are very different, some studies have suggested that they capture common patterns. Nonetheless, the tests employed to support this claim have not explicitly incorporated a phylogenetic framework, and may therefore be susceptible to confounding effects due to the presence of common phylogenetic structure...
February 9, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28179135/c-terminal-residues-in-small-potassium-channel-blockers-odk1-and-osk3-from-scorpion-venom-fine-tune-the-selectivity
#6
Alexey I Kuzmenkov, Steve Peigneur, Anton O Chugunov, Valentin M Tabakmakher, Roman G Efremov, Jan Tytgat, Eugene V Grishin, Alexander A Vassilevski
We report isolation, sequencing, and electrophysiological characterization of OSK3 (α-KTx 8.8 in Kalium and Uniprot databases), a potassium channel blocker from the scorpion Orthochirus scrobiculosus venom. Using the voltage clamp technique, OSK3 was tested on a wide panel of 11 voltage-gated potassium channels expressed in Xenopus oocytes, and was found to potently inhibit Kv1.2 and Kv1.3 with IC50 values of ~331nM and ~503nM, respectively. OdK1 produced by the scorpion Odontobuthus doriae differs by just two C-terminal residues from OSK3, but shows marked preference to Kv1...
February 4, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28177037/correction-arachnidism-scorpionism-and-ophidism-in-ouro-preto-municipality-minas-gerais-state-brazil
#7
(no author information available yet)
[This corrects the article doi: 10.1590/0037-8682-0047-2016].
February 6, 2017: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/28159722/cell-penetrating-and-cargo-delivery-ability-of-a-spider-toxin-derived-peptide-in-mammalian-cells
#8
Nisha Ponnappan, Archana Chugh
Cell-penetrating peptides are short cationic peptides with inherent ability to cross the plasma membrane barrier as well as intracellularly deliver cargo molecules conjugated to them. Venoms from snakes, scorpions and spiders are rich in membrane-active peptides. Crotamine from snake venom as well as maurocalcine and imperatoxin isolated from scorpion venoms have been reported to possess cell-penetrating property in mammalian cells. Latarcins, a group of spider venom toxins, has also been reported to possess antimicrobial property...
January 31, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28159581/recombinant-expression-of-intrepicalcin-from-the-scorpion-vaejovis-intrepidus-and-its-effect-on-skeletal-ryanodine-receptors
#9
Leonel Vargas-Jaimes, Liang Xiao, Jing Zhang, Lourival D Possani, Héctor H Valdivia, Verónica Quintero-Hernández
BACKGROUND: Scorpion venoms contain toxins that modulate ionic channels, among which are the calcins, a small group of short, basic peptides with an Inhibitor Cystine Knot (ICK) motif that target calcium release channels/ryanodine receptors (RyRs) with high affinity and selectivity. Here we describe the heterologous expression of Intrepicalcin, identified by transcriptomic analysis of venomous glands from Vaejovis intrepidus. METHODS: Recombinant Intrepicalcin was obtained in Escherichia coli BL21-DE3 (periplasm) by fusing the Intrepicalcin gene to sequences coding for signal-peptide, thioredoxin, His-tag and enterokinase cleavage site...
January 31, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28144138/in-vitro-determination-of-the-efficacy-of-scorpion-venoms-as-anti-cancer-agents-against-colorectal-cancer-cells-a-nano-liposomal-delivery-approach
#10
Abdulrahman K Al-Asmari, Zabih Ullah, Ali Al Balowi, Mozaffarul Islam
The use of liposomes in biological and medicinal sciences is a relatively new approach. The liposomal strategy greatly depends on the technological advancement in the formation of vesicles of various sizes and properties. In the current study, we encapsulated the venoms obtained from medically important scorpions such as Androctonus bicolor (AB), Androctonus crassicauda (AC), and Leiurus quinquestriatus (LQ). To begin with, our first and foremost aim was to prepare biocompatible and biodegradable nanovesicles...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28143592/tracking-platyhelminth-parasite-diversity-from-freshwater-turtles-in-french-guiana-first-report-of-neopolystoma-price-1939%C3%A2-monogenea-polystomatidae-with-the-description-of-three-new-species
#11
Louis H Du Preez, Mathieu Badets, Laurent Héritier, Olivier Verneau
BACKGROUND: Polystomatid flatworms in chelonians are divided into three genera, i.e. Polystomoides Ward, 1917, Polystomoidella Price, 1939 and Neopolystoma Price, 1939, according to the number of haptoral hooks. Among the about 55 polystome species that are known to date from the 327 modern living chelonians, only four species of Polystomoides are currently recognised within the 45 South American freshwater turtles. METHODS: During 2012, several sites in the vicinity of the cities Cayenne and Kaw in French Guiana were investigated for freshwater turtles...
January 31, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28139934/oriented-reconstitution-of-the-full-length-kcsa-potassium-channel-in-a-lipid-bilayer-for-afm-imaging
#12
Ayumi Sumino, Takayuki Uchihashi, Shigetoshi Oiki
Here, we have developed a method of oriented reconstitution of the KcsA potassium channel amenable to high-resolution AFM imaging. The solubilized full-length KcsA channels with histidine-tagged (His-tag) C-terminal ends were attached to a Ni(2+)-coated mica surface, and then detergent-destabilized liposomes were added to fill the interchannel space. AFM revealed that the membrane-embedded KcsA channels were oriented with their extracellular faces upward, seen as a tetrameric square shape. This orientation was corroborated by the visible binding of a peptide scorpion toxin, agitoxin-2...
February 1, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28135895/neurologic-complications-in-children-with-scorpionism
#13
Khaled Saad, Mohamed A Abd El-Hamed, Mohamed Gamil M Abo-Elela, Ahmed E Ahmed, Khaled A Abdel-Baseer, Mohamed Diab Aboul-Khair, Kotb Abbass Metwalley, Amira A El-Houfey, Gamal M Hasan, Ahmad M El-Shareef
Scorpion envenomation is a life-threatening health problem in tropical and subtropical regions, particularly among children. The aim of this study was to describe the epidemiologic characteristics, clinical profile, and prognosis of neurologic complications among children with scorpionism in Upper Egypt. In this retrospective study, the neurologic complications of scorpionism in 2 university hospitals were analyzed from the points of epidemiologic and clinical picture and outcomes. The neurologic manifestations were found at a high percentage (85%)...
January 1, 2017: Journal of Child Neurology
https://www.readbyqxmd.com/read/28126552/design-and-expression-of-recombinant-toxins-from-mexican-scorpions-of-the-genus-centruroides-for-production-of-antivenoms
#14
J M Jiménez-Vargas, V Quintero-Hernández, L González-Morales, E Ortiz, L D Possani
This manuscript describes the design of plasmids containing the genes coding for four main mammalian toxins of scorpions from the genus Centruroides (C.) of Mexico. The genes that code for toxin 2 of C. noxius (Cn2), toxin 2 from C. suffusus (Css2) and toxins 1 and 2 from C. limpidus (Cll1 and Cll2) were included into individual plasmids carrying the genetic construction for expression of fusion proteins containing a leader peptide (pelB) that directs the expressed protein to the bacterial periplasm, a carrier protein (thioredoxin), the cleavage site for enterokinase, the chosen toxin and a poly-histidine tag (6xHis-tag) for purification of the hybrid protein by immobilized metal ion affinity chromatography after expression in Escherichia coli strain BL21 (DE3)...
January 23, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28124609/recombinant-expression-functional-characterization-of-two-scorpion-venom-toxins-with-three-disulfide-bridges-from-the-chinese-scorpion-buthus-martensii-karsch
#15
ShengGuo Lin, XueLin Wang, XueYao Hu, YongShan Zhao, MingYi Zhao, JingHai Zhang, Yong Cui
Scorpion venom contains a large variety of biologically active peptides. However, most of these peptides have not been identified and characterized. Peptides with three disulfide bridges, existing in the scorpion venom, have not been studied in detail and have been poorly characterized until now. Here, we report the recombinant expression and functional characterization of two kinds of venom peptides (BmKBTx and BmNaL-3SS2) with three disulfide bridges. This study adopted an effective E. coli system. The genes for BmKBTx and BmNaL-3SS2 were obtained by the Polymerase Chain Reaction method and finally cloned to the pSYPU-1b vector...
January 17, 2017: Protein and Peptide Letters
https://www.readbyqxmd.com/read/28124029/consequences-of-androctonus-mauretanicus-and-buthus-occitanus-scorpion-venoms-on-electrolyte-levels-in-rabbits
#16
Khadija Daoudi, Fatima Chgoury, Myriam Rezzak, Oussama Bourouah, Lotfi Boussadda, Abdelaziz Soukri, Jean-Marc Sabatier, Naoual Oukkache
Androctonus mauretanicus (A. mauretanicus) and Buthus occitanus (B. occitanus) scorpions, which belong to the Buthidae family, are the most venomous scorpions in Morocco. For the first time, we investigated the effects of such scorpion venoms on serum electrolytes in subcutaneously injected rabbits. For this purpose, 3 groups of 6 albinos adult male rabbits (New Zealand) were used in this experiment. Two of the groups were given a single subcutaneous injection of either crude Am venom (5 μg/kg) or Bo venom (8 μg/kg) whereas the third group (control group) only received physiological saline solution (NaCl 0...
January 2017: Heliyon
https://www.readbyqxmd.com/read/28123903/genetic-and-morphological-analyses-indicate-that-the-australian-endemic-scorpion-urodacus-yaschenkoi-scorpiones-urodacidae-is-a-species-complex
#17
Karen Luna-Ramirez, Adam D Miller, Gordana Rašić
BACKGROUND: Australian scorpions have received far less attention from researchers than their overseas counterparts. Here we provide the first insight into the molecular variation and evolutionary history of the endemic Australian scorpion Urodacus yaschenkoi. Also known as the inland robust scorpion, it is widely distributed throughout arid zones of the continent and is emerging as a model organism in biomedical research due to the chemical nature of its venom. METHODS: We employed Bayesian Inference (BI) methods for the phylogenetic reconstructions and divergence dating among lineages, using unique haplotype sequences from two mitochondrial loci (COXI, 16S) and one nuclear locus (28S)...
2017: PeerJ
https://www.readbyqxmd.com/read/28115184/venom-gland-transcriptomics-and-venom-proteomics-of-the-black-back-scorpion-hadrurus-spadix-reveal-detectability-challenges-and-an-unexplored-realm-of-animal-toxin-diversity
#18
Darin R Rokyta, Micaiah J Ward
The order Scorpiones is one of the most ancient and diverse lineages of venomous animals, having originated approximately 430 million years ago and diversified into 14 extant families. Although partial venom characterizations have been described for numerous scorpion species, we provided the first quantitative transcriptome/proteome comparison for a scorpion species using single-animal approaches. We sequenced the venom-gland transcriptomes of a male and female black-back scorpion (Hadrurus spadix) from the family Caraboctonidae using the Illumina sequencing platform and conducted independent quantitative mass-spectrometry analyses of their venoms...
March 15, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28105150/ovarian-metastasis-from-non-small-cell-lung-cancer-with-alk-and-egfr-mutations-a-report-of-two-cases
#19
Rosemary T Mushi, Yumei Yang, Qian Cai, Ruiguang Zhang, Gang Wu, Xiaorong Dong
Ovarian metastasis from non-small cell lung cancer (NSCLC) is a rare condition. The current study presents the cases of 2 female patients aged 38 and 47 years old, respectively, who were initially diagnosed with NSCLC adenocarcinoma on histology. Both patients initially presented with chest pain and a cough, and subsequently developed ovarian metastases following multiple treatments. The 38-year old patient exhibited an epidermal growth factor receptor mutation, confirmed by scorpion/amplified refractory mutation system analysis from a lung biopsy...
December 2016: Oncology Letters
https://www.readbyqxmd.com/read/28096686/peptide-consensus-sequence-determination-for-the-enhancement-of-the-antimicrobial-activity-and-selectivity-of-antimicrobial-peptides
#20
Ammar Almaaytah, Ya'u Ajingi, Ahmad Abualhaijaa, Shadi Tarazi, Nizar Alshar'i, Qosay Al-Balas
The rise of multidrug-resistant bacteria is causing a serious threat to the world's human population. Recent reports have identified bacterial strains displaying pan drug resistance against antibiotics and generating fears among medical health specialists that humanity is on the dawn of entering a post-antibiotics era. Global research is currently focused on expanding the lifetime of current antibiotics and the development of new antimicrobial agents to tackle the problem of antimicrobial resistance. In the present study, we designed a novel consensus peptide named "Pepcon" through peptide consensus sequence determination among members of a highly homologous group of scorpion antimicrobial peptides...
2017: Infection and Drug Resistance
keyword
keyword
12470
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"