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Mostrando ítems 746-765 de 1169
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Myonecrosis induced in mice by a basic myotoxin isolated from the venom of the snake Bothrops nummifer (jumping viper) from Costa Rica
(1989)The mode of action of a basic myotoxin isolated from Bothrops nummifer venom was studied. This myotoxin is a basic polypeptide of 13,000 mol.wt, with a high content of lysine and aspartate, as well as of hydrophobic amino ... -
Myotoxic and cytolytic activities of dimeric Lys49 phospholipase A2 homologues are reduced, but not abolished, by a pH-induced dissociation
(2005-09-01)Lys49 phospholipase A2 (PLA2) homologues are myotoxic proteins devoid of catalytic activity. Their toxic determinants map to the C-terminal region 115–129, which plays an effector role in membrane damage. The dimeric state ... -
Myotoxic phospholipases A2 in Bothrops snake venoms: Effect of chemical modifications on the enzymatic and pharmacological properties of bothropstoxins from Bothrops jararacussu
(2000-08)Venoms from eight Bothrops spp. were fractionated by ion-exchange chromatography on CM-Sepharose at pH 8.0 for the purification of myotoxins. Chromatographic profiles showed differences regarding myotoxic components among ... -
Myotoxin II from Bothrops asper (Terciopelo) venom is a lysine-49 phospholipase A2
(1991)A basic, dimeric myotoxic protein, myotoxin II, purified from Bothrops asper venom has a similar molecular weight and is immunologically cross-reactive with antibodies raised to previously isolated B. asper phospholipases ... -
Myotoxin-neutralizing peptides
(2018-03-27)The present invention relates to polypeptides having myotoxin-neutralizing properties and their use for treatment of envenomation. The present invention further relates to methods for neutralizing a venom using the polypeptide ... -
N-Formyl-Perosamine Surface Homopolysaccharides Hinder the Recognition of Brucella abortus by Mouse Neutrophils
(2016-06)Brucella abortus is an intracellular pathogen of monocytes, macrophages, dendritic cells, and placental trophoblasts. This bacterium causes a chronic disease in bovines and in humans. In these hosts, the bacterium also ... -
N-terminal peptide of myotoxin II from Bothrops asper venom enhances the activity of endothelin converting enzyme and neprilysin
(2016)Neprilysin (NEP) and endothelin converting enzyme-1 (ECE-1) are two enzymes that degrade amyloid beta in the brain. Currently there are no molecules to stimulate the activity of these enzymes. Here we report, the discovery ... -
Neotropical Bats from Costa Rica harbour Diverse Coronaviruses
(2015-02-04)Bats are hosts of diverse coronaviruses (CoVs) known to potentially cross the host–species barrier. For analysing coronavirus diversity in a bat species-rich country, a total of 421 anal swabs/faecal samples from Costa ... -
Neotropical bats that co-habit with humans function as dead-end hosts for dengue virus
(2017-05-18)Several studies have shown Dengue Virus (DENV) nucleic acids and/or antibodies present in Neotropical wildlife including bats, suggesting that some bat species may be susceptible to DENV infection. Here we aim to elucidate ... -
Neotropical primary bat cell lines show restricted dengue virus replication
(2017-02)Dengue is the most widespread arboviral disease affecting humans. Bats are recognized carriers of emerging viral zoonoses and have been proposed as dengue reservoirs, since RNA/NS1 and/or antiviral antibodies have been ... -
Neurotoxicity and other pharmacological activities of the snake venom phospholipase A2 OS2: the N-terminal region is more important than enzymatic activity
(2006-05)Several snake venom secreted phospholipases A2 (sPLA2s) including OS2 exert a variety of pharmacological effects ranging from central neurotoxicity to anti-HIV activity by mechanisms that are not yet fully understood. To ... -
Neutralización de las actividades tóxicas y enzimáticas de cuatro venenos de serpientes de Guatemala y Honduras por el antiveneno polivalente producido en Costa Rica
(1987)We studied the ability of the polyvalent antivenom produced in Costa Rica to neutralize lethal, hemorrhagic, edema-forming, proteolytic, hemolytic, hyaluronidase and fibrinolytic activities of the venoms of Bothrops asper ... -
Neutralization of Bothrops asper venom by antibodies, natural products, and synthetic drugs: contributions to understanding snakebite envenomings and their treatment
(2009)Interest in studies on the neutralization of snake venoms and toxins by diverse types of inhibitors is two-fold. From an applied perspective, results enclose the potential to be translated into useful therapeutic products ... -
Neutralization of Bothrops mattogrossensis snake venom from Bolivia: Experimental evaluation of llama and donkey antivenoms produced by caprylic acid precipitation
(2010-02-01)Polyspecific bothropic/crotalic and bothropic/lachesic antivenoms were produced in Bolivia by immunizing two donkeys with the venoms of Bothrops mattogrossensis and Crotalus durissus terrificus and one llama with the venoms ... -
Neutralization of coral snake Micrurus nigrocinctus venom by a monovalent antivenom
(1991)The neutralizing ability of a monovalent anti-Micrurus nigrocinctus (coral snake) antivenom produced in Costa Rica was tested against the lethal, myotoxic and phospholipase A2 activities of homologous venom. In addition, ... -
Neutralization of crotaline snake venoms from Central and South America by antivenoms produced in Brazil and Costa Rica
(2000-10)A study was performed on the ability of antivenoms, produced in Brazil and Costa Rica, to neutralize lethal, hemorrhagic and coagulant activities of the venoms of 16 species of Central and South American snakes of the ... -
Neutralization of four Peruvian Bothrops sp. snake venoms by polyvalent antivenoms produced in Perú and Costa Rica: preclinical assessment
(2005-06)Envenomations after bites inflicted by snakes of the genus Bothrops constitute a public health hazard in Perú, and the intravenous administration of equine-derived antivenoms represents the only scientifically validated ... -
Neutralization of local effects of the terciopelo (Bothrops asper) venom by blood serum of the colubrid snake Clelia clelia
(1982)The neutralizing capacity of the blood serum of the non-venomous snake Clelia clelia against the hemorrhagic, edematous and myonecrotic effects of Bothrops asper venom in white mice was tested using in vitro preincubation ... -
Neutralization of local tissue damage induced by Bothrops asper (terciopelo) snake venom
(1998-11)Local tissue damage represents a serious consequence of Bothrops asper envenomations. It encompasses a complex series of alterations, including myonecrosis, dermonecrosis, hemorrhage and edema. Due to its rapid development ... -
Neutralization of myonecrosis, hemorrhage, and edema induced by Bothrops asper snake venom by homologous and heterologous pre-existing antibodies in mice
(1996)The ability of pre-existing antibodies to neutralize locally-acting toxins of Bothrops asper snake venom was investigated. Hemorrhage, myonecrosis, and edema were markedly reduced in actively immunized mice, although ...