Consulta: creatorFacets:"Santos,Lucilene Delazari dos"
Registros recuperados: 5
Data/hora: 11/06/2024 01:23:08

Heterologous fibrin sealant derived from snake venom: from bench to bedside – an overview
Provedor de dados: Journal of Venomous Animals and Toxins Including Tropical Diseases
Autores: Ferreira Jr,Rui Seabra; Barros,Luciana Curtolo de; Abbade,Luciana Patrícia Fernandes; Barraviera,Silvia Regina Catharino Sartori; Silvares,Maria Regina Cavariani; Pontes,Leticia Gomes de; Santos,Lucilene Delazari dos; Barraviera,Benedito.
Abstract Hemostatic and adhesive agents date back to World War II, when homologous fibrin sealant came onto scene. Considering that infectious diseases can be transmitted via human blood, a new heterologous fibrin sealant was standardized in the 1990s. Its components were a serine protease (a thrombin-like enzyme) extracted from the venom of Crotalus durissus terrificus snakes and a fibrinogen-rich cryoprecipitate extracted from the blood of Bubalus bubalis buffaloes. This new bioproduct has been used as a coagulant, sealant, adhesive and recently as a candidate scaffold for mesenchymal stem cells and bone and cartilage repair. This review discusses the composition of a new heterologous fibrin sealant, and cites published articles related to its...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fibrin sealant; Snake venom; Cryoprecipitate coagulum; Thrombin-like enzyme; Buffaloes.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992017000100204

A clinical trial protocol to treat massive Africanized honeybee (Apis mellifera) attack with a new apilic antivenom
Provedor de dados: Journal of Venomous Animals and Toxins Including Tropical Diseases
Autores: Barbosa,Alexandre Naime; Boyer,Leslie; Chippaux,Jean-Philippe; Medolago,Natalia Bronzatto; Caramori,Carlos Antonio; Paixão,Ariane Gomes; Poli,João Paulo Vasconcelos; Mendes,Mônica Bannwart; Santos,Lucilene Delazari dos; Ferreira Jr,Rui Seabra; Barraviera,Benedito.
Abstract  Background  Envenomation caused by multiple stings from Africanized honeybees Apis mellifera constitutes a public health problem in the Americas. In 2015, the Brazilian Ministry of Health reported 13,597 accidents (incidence of seven cases per 100,000 inhabitants) with 39 deaths (lethality of 0.25%). The toxins present in the venom, which include melittin and phospholipase A2, cause lesions in diverse organs and systems that may be fatal. As there has been no specific treatment to date, management has been symptomatic and supportive only.  Methods  In order to evaluate the safety and neutralizing capacity of a new apilic antivenom, as well as to confirm its lowest effective dose, a clinical protocol was developed to be applied in a multicenter,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apis mellifera; Bee venom; Toxins; Envenomation; Heterologous serum; Apilic antivenom; Bee antivenom.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992017000100309

Crotalus durissus terrificus crotapotin naturally displays preferred positions for amino acid substitutions
Provedor de dados: Journal of Venomous Animals and Toxins Including Tropical Diseases
Autores: Oliveira,Laudicéia Alves de; Ferreira Jr,Rui Seabra; Barraviera,Benedito; Carvalho,Francilene Capel Tavares de; Barros,Luciana Curtolo de; Santos,Lucilene Delazari dos; Pimenta,Daniel Carvalho.
Abstract  Background  Classically, Crotalus durissus terrificus (Cdt) venom can be described, according to chromatographic criteria, as a simple venom, composed of four major toxins, namely: gyroxin, crotamine, crotoxin and convulxin. Crotoxin is a non-covalent heterodimeric neurotoxin constituted of two subunits: an active phospholipase A2 and a chaperone protein, termed crotapotin. This molecule is composed of three peptide chains connected by seven disulfide bridges. Naturally occurring variants/isoforms of either crotoxin or crotapotin itself have already been reported.  Methods  The crude Cdt venom was separated by using RP-HPLC and the toxins were identified by mass spectrometry (MS). Crotapotin was purified, reduced and alkylated in order to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crotalus durissus terrificus; Venom; Crotoxin; Crotapotin; Isoforms.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992017000100319

Traceability of animal protein byproducts in ruminants by multivariate analysis of isotope ratio mass spectrometry to prevent transmission of prion diseases
Provedor de dados: Journal of Venomous Animals and Toxins Including Tropical Diseases
Autores: Ferreira Jr.,Rui Seabra; Silva,Daniela Alessandra Fossato da; Biscola,Natália Perussi; Sartori,Maria Márcia Pereira; Denadai,Juliana Célia; Jorge,André Mendes; Santos,Lucilene Delazari dos; Barraviera,Benedito.
Abstract  Background: Ruminant feed containing animal byproduct proteins (ABPs) is prohibited in many countries due to its risk of transmitting prion diseases (PD). In most cases the entire herd is sacrificed, which causes great harm to the producer countries by preventing their exportation of ruminant derived-products.  Methods: We used stable isotope ratio mass spectrometry (IRMS) of carbon (13C/12C) and nitrogen (15N/14N) to trace the animal protein in the blood of 15 buffaloes (Bubalus bubalis) divided into three experimental groups: 1 - received only vegetable protein (VP) during 117 days; 2 - received animal and vegetable protein (AVP); and 3 - received animal and vegetable protein with animal protein subsequently removed (AVPR). Groups 2 and 3...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Prion diseases; Monitoring; Bovine spongiform; Encephalopathy; Stable isotopes.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992019000100312

Melittin induces in vitro death of Leishmania (Leishmania) infantum by triggering the cellular innate immune response
Provedor de dados: Journal of Venomous Animals and Toxins Including Tropical Diseases
Autores: Pereira,Andreia Vieira; Barros,Gustavo de; Pinto,Erika Gracielle; Tempone,Andre Gustavo; Orsi,Ricardo de Oliveira; Santos,Lucilene Delazari dos; Calvi,Sueli; Ferreira Jr,Rui Seabra; Pimenta,Daniel Carvalho; Barraviera,Benedito.
Abstract  Background Apis mellifera venom, which has already been recommended as an alternative anti-inflammatory treatment, may be also considered an important source of candidate molecules for biotechnological and biomedical uses, such as the treatment of parasitic diseases.  Methods  Africanized honeybee venom from Apis mellifera was fractionated by RP-C18-HPLC and the obtained melittin was incubated with promastigotes and intracellular amastigotes of Leishmania (L.) infantum. Cytotoxicity to mice peritoneal macrophages was evaluated through mitochondrial oxidative activity. The production of anti- and pro-inflammatory cytokines, NO and H2O2 by macrophages was determined.  Results  Promastigotes and intracellular amastigotes were susceptible to melittin...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Melittin; Apis mellifera; Leishmania; Leishmaniasis; Peptides; Toxins; Antiparasitic; Cytokines.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992016000100301