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| Registros recuperados: 22 | |
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| Ozkan,O; Yagmur,EA; Ark,M. |
| Currently, medically significant scorpion species belong to the Buthidae family and are represented by the genera Androctonus, Buthus, Mesobuthus, Hottentotta, Parabuthus, Tityus, Centruroides, Leiurus. Although Leiurus was originally considered a monotypic genus, four additional species have since been described. Leiurus abdullahbayrami (previously identified as L. quinquestriatus in Turkey) was classified as a new Leiurus species. This is the first report conducted on the lethality and biologic effects of L. abdullahbayrami scorpion venom in mice. In this study, the electrophoretic protein pattern of its venom was also determined. Two protein bands with molecular masses of 4 and 6 kDa were more strongly detected than other protein bands in the venom... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Scorpions; Leiurus spp.; Scorpion venom; Lethality; In vivo effects. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992011000400008 |
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| Nunan,E.A.; Arya,V.; Hochhaus,G.; Cardoso,V.N.; Moraes-Santos,T.. |
| The pharmacokinetics of scorpion venom and its toxins has been investigated in experimental models using adult animals, although, severe scorpion accidents are associated more frequently with children. We compared the effect of age on the pharmacokinetics of tityustoxin, one of the most active principles of Tityus serrulatus venom, in young male/female rats (21-22 days old, N = 5-8) and in adult male rats (150-160 days old, N = 5-8). Tityustoxin (6 µg) labeled with 99mTechnetium was administered subcutaneously to young and adult rats. The plasma concentration vs time data were subjected to non-compartmental pharmacokinetic analysis to obtain estimates of various pharmacokinetic parameters such as total body clearance (CL/F), distribution volume (Vd/F),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Scorpion venom; Tityustoxin; Pharmacokinetics; Age; Bootstrapping resampling; Non-compartmental analysis. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000300016 |
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| Mata,Élida Cleyse Gomes da; Mourão,Caroline Barbosa Farias; Rangel,Marisa; Schwartz,Elisabeth Ferroni. |
| Abstract Viruses exhibit rapid mutational capacity to trick and infect host cells, sometimes assisted through virus-coded peptides that counteract host cellular immune defense. Although a large number of compounds have been identified as inhibiting various viral infections and disease progression, it is urgent to achieve the discovery of more effective agents. Furthermore, proportionally to the great variety of diseases caused by viruses, very few viral vaccines are available, and not all are efficient. Thus, new antiviral substances obtained from natural products have been prospected, including those derived from venomous animals. Venoms are complex mixtures of hundreds of molecules, mostly peptides, that present a large array of biological activities and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antiretroviral agents; Antiviral agents; HIV; Scorpion venom; Snake venom; Amphibian venom; Insect venom; Marine animal peptides. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992017000100200 |
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| Cordeiro,Francielle A.; Amorim,Fernanda G.; Anjolette,Fernando A. P.; Arantes,Eliane C.. |
| Arachnida is the largest class among the arthropods, constituting over 60,000 described species (spiders, mites, ticks, scorpions, palpigrades, pseudoscorpions, solpugids and harvestmen). Many accidents are caused by arachnids, especially spiders and scorpions, while some diseases can be transmitted by mites and ticks. These animals are widely dispersed in urban centers due to the large availability of shelter and food, increasing the incidence of accidents. Several protein and non-protein compounds present in the venom and saliva of these animals are responsible for symptoms observed in envenoming, exhibiting neurotoxic, dermonecrotic and hemorrhagic activities. The phylogenomic analysis from the complementary DNA of single-copy nuclear protein-coding... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arachnid toxins; Scorpion venom; Spider venom; Tick saliva. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992015000100211 |
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| Mirakabadi,A. Z.; Jalali,A.; Jahromi,A. E.; Vatanpur,H.; Akbary,A.. |
| Many toxins from scorpion venoms cause neurotransmitters release by activating the autonomic system. The aim of the present work was to determine osmotic fragility of red blood cells (RBCs) and serum biochemical changes produced by the venom of Odonthobuthus doriae (O. doriae), a dangerous species of scorpion in Iran. For this study we selected 2 groups, each one containing 10 New Zealand white rabbits weighing 2 ± 0.2 kg. In vivo and in vitro osmotic fragilities as well as packed cell volume (PCV) were determined. Serum was separated and used for determination of glucose, blood urea nitrogen (BUN), creatinine, uric acid (UA), triglycerides, cholesterol, aspartate aminotransferase (AST, EC 2.6.1.1), and alanine aminotransferase (ALT, EC 2.6.1.2). Results... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Scorpion venom; Odonthobuthus doriae; Biochemical changes; Manifestation of envenomation; Osmotic fragility of RBCs. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992006000100006 |
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| Erdeş,Efe; Doğan,Tuğba Somay; Coşar,İlhan; Danışman,Tarık; Kunt,Kadir Boğaç; Şeker,Tamay; Yücel,Meral; Özen,Can. |
| Background Scorpion venoms are rich bioactive peptide libraries that offer promising molecules that may lead to the discovery and development of new drugs.Leiurus abdullahbayrami produces one of the most potent venoms among Turkish scorpions that provokes severe symptoms in envenomated victims.Methods In the present study, the peptide profile of the venom was investigated by electrophoretic methods, size-exclusion and reversed-phase chromatography and mass spectroscopy. Cytotoxic and antimicrobial effects were evaluated on a breast cancer cell line (MCF-7) and various bacterial and fungal species.Results Proteins make up approximately half of the dry weight of L. abdullahbayrami crude venom. Microfluidic capillary electrophoresis indicated the presence of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Scorpion venom; Toxin; Peptide; Leiurus abdullahbayrami; Microfluidic capillary; Electrophoresis; Peptidomics; Venomics; Cytotoxicity; Antimicrobial activity; Turkey. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992014000200338 |
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| Chaubey,MK. |
| The present study aimed to investigate the effects of Mesobuthus tamulus gangeticus Pocock (Buthidae) venom on albino mice (NIH strain). Whole venom was obtained by electrical stimulation and its toxicity was determined in albino mice by subcutaneous envenomation. The venom LD50 was 2.5 mg kg-1 of mouse body weight. Toxic effects on different biochemical and enzymatic parameters in blood serum and other tissues of albino mice were determined after experimental envenomation with sublethal doses of M. tamulus gangeticus venom. Increased levels of glucose, uric acid and cholesterol, as well as decreased serum total proteins, were observed at 2 and 4 hours after the envenomation. In the liver and muscles, glycogen content dropped after venom injection.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mesobuthus tamulus gangeticus; Scorpion venom; Hyperglycemia; Serum enzymes. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992010000300011 |
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| Omran,M. A. A.. |
| Scorpion venom toxicity is of major concern due to its influence on human activities and public health. The cytotoxicity and apoptosis induced by scorpion L. quinquestriatus venom on two established eukaryotic cell lines (293T and C2C12) were analyzed. Both cultured cell lines were incubated with varying doses (10, 20, and 50 µg/ml) of scorpion venom in serum free medium (SFM) for 0.5, 1, 2, 4, and 8 hours at 37°C. The percentage of total lactate dehydrogenase (LDH) released in the culture during venom incubation was used as an index of cell damage. Control culture was treated with an equal amount of SFM. Cell injury was recognized morphologically and apoptosis was researched by a Fluorescing Apoptosis Detection System using the principle of TUNEL... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Scorpion venom; Leiurus quinquestriatus; Cytotoxicity; Apoptosis; LDH. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992003000200008 |
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| Abdoon,N. A.; Ali,A. A.; Alnema,A. A.; Hag-Ali,M.; Fatani,A. J.. |
| The cumulative actions of scorpion neurotoxins are complex and may be traced to activation of different ion channels with subsequent release of various transmitters and modulators including inflammatory mediators. This could lead to various pathological manifestations such as acute respiratory distress syndrome (ARDS), systemic inflammatory response syndrome (SIRS), and multiple organ failure (MOF). Several approaches have been advocated to treat the multitude of scorpion-venom-elicited pathological changes. However, few have tried to combat the venom-induced effects on the inflammatory process, which manifest as ARDS, SIDS and MOF. Thus, the aim of this study was to determine the capability of inhibitors of different steps of the inflammatory sequence of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leiurus quinquestriatus quinquestriatus; Scorpion venom; Acute respiratory distress syndrome; Systemic inflammatory response syndrome; Multiple organ failure; Montelukast; Hydrocortisone; Indomethacin. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992006000300003 |
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| Nencioni,Ana Leonor Abrahão; Beraldo Neto,Emidio; Freitas,Lucas Alves de; Dorce,Valquiria Abrão Coronado. |
| Abstract In Brazil, the scorpion species responsible for most severe incidents belong to the Tityus genus and, among this group, T. serrulatus, T. bahiensis, T. stigmurus and T. obscurus are the most dangerous ones. Other species such as T. metuendus, T. silvestres, T. brazilae, T. confluens, T. costatus, T. fasciolatus and T. neglectus are also found in the country, but the incidence and severity of accidents caused by them are lower. The main effects caused by scorpion venoms - such as myocardial damage, cardiac arrhythmias, pulmonary edema and shock - are mainly due to the release of mediators from the autonomic nervous system. On the other hand, some evidence show the participation of the central nervous system and inflammatory response in the process.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazilian scorpions; Central nervous system; Scorpion venom; Scorpion toxins. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992018000100202 |
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| Valdez-Velázquez,Laura L.; Olamendi-Portugal,Timoteo; Restano-Cassulini,Rita; Zamudio,Fernando Z.; Possani,Lourival D.. |
| Abstract Background Centruroides hirsutipalpus, of the family Buthidae, is a scorpion endemic to the Western Pacific region of Mexico. Although medically important, its venom has not yet been studied. Therefore, this communication aims to identify their venom components and possible functions. Methods Fingerprinting mass analysis of the soluble venom from this scorpion was achieved by high-performance liquid chromatography and electrospray mass spectrometry. Furthermore, the soluble venom and its toxic effects were evaluated extensively via electrophysiological assays in HEK cells expressing human voltage-gated Na+ channels (hNav 1.1 to Nav1.6), CHO cells expressing hNav 1.7, potassium channel hERG 1 (Ether-à-go-go-related-gene) and the human K+-channel... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Centruroides; Electrophysiology; Mass fingerprinting; Scorpion venom. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992018000100310 |
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| Lima,Priscila C.; Bordon,Karla C. F.; Pucca,Manuela B.; Cerni,Felipe A.; Zoccal,Karina F.; Faccioli,Lucia H.; Arantes,Eliane C.. |
| Abstract Background The yellow scorpion Tityus serrulatus (Ts) is responsible for the highest number of accidents and the most severe scorpion envenoming in Brazil. Although its venom has been studied since the 1950s, it presents a number of orphan peptides that have not been studied so far. The objective of our research was to isolate and identify the components present in the fractions VIIIA and VIIIB of Ts venom, in order to search for a novel toxin. The major isolated toxins were further investigated for macrophage modulation. Methods The fractions VIIIA and VIIIB, obtained from Ts venom cation exchange chromatography, were rechromatographed on a C18 column (4.6 × 250 mm) followed by a reversed-phase chromatography using another C18 column (2.1 ×... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Β-KTx; Cytokine; Interleukin; Neurotoxin; Pro-inflammatory; Scorpion venom; Tityus serrulatus. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992015000100353 |
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| Amorim,Fernanda Gobbi; Longhim,Heloisa Tavoni; Cologna,Camila Takeno; Degueldre,Michel; Pauw,Edwin De; Quinton,Loïc; Arantes,Eliane Candiani. |
| Abstract Background: Tityus serrulatus venom (Ts venom) is a complex mixture of several compounds with biotechnological and therapeutical potentials, which highlights the importance of the identification and characterization of these components. Although a considerable number of studies have been dedicated to the characterization of this complex cocktail, there is still a limitation of knowledge concerning its venom composition. Most of Ts venom studies aim to isolate and characterize their neurotoxins, which are small, basic proteins and are eluted with high buffer concentrations on cation exchange chromatography. The first and largest fraction from carboxymethyl cellulose-52 (CMC-52) chromatography of Ts venom, named fraction I (Fr I), is a mixture of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tityus serrulatus; Scorpion venom; Enzymes; Proteases; ACE inhibitors; Proteome. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992019000100308 |
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| MURTHY,K. RADHA KRISHNA; ZARE,M. ABBAS. |
| Electrocardiographic (ECG) changes were induced in dogs by injection of scorpion venom from Mesobuthus tamulus concanesis, Pocock. Venom (3 mg/kg body weight) was given subcutaneously (SQ) while 10 ml of scorpion antivenom (SAV) was administered intravenously (IV) to experimental dogs. Group 1 received only the venom; Groups 2, 3, and 4 received SAV at 0, 30, and 60 min, respectively, following envenoming. Thick, ropy and profuse salivation; muscle fasciculation; clonus and tetany-like contractions; frequent urination; and bowel emptying sometimes stained with bile and occasionally blood and bile were observed 20-25 minutes after envenoming. Following envenoming, hyperglycemia, increase in free fatty acid (FFA) levels, and reduction in triglyceride levels... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antivenom; Scorpion venom; Mesobuthus tamulus concanesis; Hyperglycemia; Free fatty acids; Triglycerides; Insulin; Hyperinsulinemia; Insulin resistance; Electrocardiographic changes. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79302002000100004 |
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| MURUGESAN,S.; RADHA KRISHNA MURTHY,K.; NORONHA,O. P. D.; SAMUEL,A. M.. |
| Labelling of scorpion (Mesobuthus tamulus concanesis Pocock) venom was successfully achieved with Tc 99m using direct tin reduction procedure. Biodistribution studies were carried out in Wistar rats at different time intervals after i.v. administration of the labelled venom. Scintiimages were obtained after scorpion envenoming using a large field of view gamma camera to ascertain the pharmacological action of venom in the body. Within 5 min of administration, labelled venom was found in the blood (27.7%), muscle (30.11%), bone (13.3%), kidneys (11.5%), liver (10.4%), and other organs. The level of venom in the kidneys was higher than in the liver. The labelled venom was excreted through renal and hepatobiliary pathways. An immunoreactivity study was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mesobuthus tamulus concanesis; Tc 99m; Scorpion venom. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79301999000100003 |
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| Registros recuperados: 22 | |
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