Xa Factor
Mostrando 1-12 de 164 artigos, teses e dissertações.
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1. Quando indicar uso de anticoagulante para um paciente com Fibrilação Atrial(FA)?
Quando a FA apresentar escore CHA2DS2-Vasc maior ou igual a 1, neste caso, pontuado pela hipertensão e pela idade, tem indicação de anticoagulação adequada. São utilizados medicamentos antagonistas da vitamina K, como o Warfarin ou algum dos novos ACO (NACO), classe de medicamentos de inibidores diretos do fator Xa, como a rivaroxabana, a ap
Núcleo de Telessaúde Santa Catarina. Publicado em: 12/06/2023
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2. Subproteome of Lachesis muta rhombeata venom and preliminary studies on LmrSP-4, a novel snake venom serine proteinase
Abstract Background: Lachesis muta rhombeata is one of the venomous snakes of medical importance in Brazil whose envenoming is characterized by local and systemic effects which may produce even shock and death. Its venom is mainly comprised of serine and metalloproteinases, phospholipases A2 and bradykinin-potentiating peptides. Based on a previously report
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 15/04/2019
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3. Pyrazolyl-Tetrazoles and Imidazolyl-Pyrazoles as Potential Anticoagulants and their Integrated Multiplex Analysis Virtual Screening
This article reports a novel virtual screening algorithm seeking the rational identification of novel lead anticoagulants. Seven 5-(3-methyl-1-aryl-1H-pyrazol-4-yl)-1H-tetrazoles and seven novel 1-aryl-4-(4,5-dihydro-1H-imidazol-2-yl)-3-methyl-1H-pyrazoles were obtained in three steps starting from arylhydrazine hydrochlorides as raw materials in good yields
J. Braz. Chem. Soc.. Publicado em: 2019-01
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4. Purification and enzymatic characterization of a novel metalloprotease from Lachesis muta rhombeata snake venom
Abstract Background: Lachesis muta rhombeata (Lmr) is the largest venomous snake in Latin America and its venom contains mainly enzymatic components, such as serine and metalloproteases, L-amino acid oxidase and phospholipases A2. Metalloproteases comprise a large group of zinc-dependent proteases that cleave basement membrane components such as fibronectin
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 17/12/2018
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5. Microwave Assisted Synthesis of Novel Six-Membered 4-C, 4-O and 4-S Lactams Derivatives: Characterization and in vitro Biological Evaluation of Cytotoxicity and Anticoagulant Activity
A series of six-membered lactam derivatives containing C, O and S atoms in position 4 were synthesized using microwave methodology through coupling reactions. The novel compounds were synthesized following two step reaction to yield fifteen derivatives. The final derivative N-(4-(3-oxotiomorpholin)phenyl) hexanamide was selectively toxic to the HCT-116 cell
J. Braz. Chem. Soc.. Publicado em: 2017-02
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6. Leishmania amazonensis exhibits phosphatidylserine-dependent procoagulant activity, a process that is counteracted by sandfly saliva
Leishmania parasites expose phosphatidylserine (PS) on their surface, a process that has been associated with regulation of host's immune responses. In this study we demonstrate that PS exposure by metacyclic promastigotes of Leishmania amazonensis favours blood coagulation. L. amazonensis accelerates in vitro coagulation of human plasma. In addition, L. am
Mem. Inst. Oswaldo Cruz. Publicado em: 2013-09
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7. Isolated biomolecules of pharmacological interest in hemostasis from Cerastes cerastes venom
Biomolecules from Cerastes cerastes venom have been purified and characterized. Two phospholipases isolated from Cerastes cerastes venom share 51% of homology. CC2-PLA2 exhibits antiplatelet activity that blocks coagulation. CCSV-MPase, a non-hemorrhagic Zn2+-metalloproteinase, significantly reduced the plasmatic fibrinogen level and hydrolyzes only its Bβ
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 01/05/2013
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8. Procoagulant properties of human MV3 melanoma cells
A correlation between cancer and prothrombotic states has long been described. More recently, a number of studies have focused on the procoagulant mechanisms exhibited by tumor cells. In the present study, we dissected the molecular mechanisms responsible for the procoagulant activity of MV3, a highly aggressive human melanoma cell line. It was observed that
Brazilian Journal of Medical and Biological Research. Publicado em: 11/01/2008
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9. Heterologous expression of an insecticidal gene from the armed spider (Phoneutria nigriventer)
Insect-pests are global problems that cause severe damage to crop plants, and their control is commonly based on chemical insecticides. However, negative effects of pesticides on the environment and human health emphasize the necessity to develop alternative methods for insect-pest control. In the present study, a gene coding for the insecticidal peptide TX4
Journal of Venomous Animals and Toxins including Tropical Diseases. Publicado em: 2008
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10. The role of autolysis loop in determining the specificity of coagulation proteases
We recently demonstrated that the substitution of the autolysis loop (residues 143 to 154 in the chymotrypsin numbering system) of activated protein C (APC) with the corresponding loop of factor Xa (fXa) renders the APC mutant (APC/fX143-154) susceptible to inhibition by antithrombin (AT) in the presence of pentasaccharide. Our recent results further indicat
Brazilian Journal of Medical and Biological Research. Publicado em: 22/06/2007
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11. Purificação e caracterização bioquimica de um fator procoagulante do veneno de Lonomia obliqua / Purification and biochemistry characterization of a procoagulant factor of Lonomia oblique venom
Since 1986 accidents caused by contact with caterpillars of butterflies of the Lonomia obliqua species comes being notified in the South Region of Brazil. The human envenoming for this species results in alterations of the coagulation system, characterizing a disseminated intravascular coagulation, associated to a severe fibrinolytic syndrome. Studies had de
Publicado em: 2006
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12. Obtenção de uma desintegrina recombinante de Agkistrodon contortrix laticinctus e estudo dos efeitos de desintegrinas na expressão do fator de crescimento de endotélio vascular.
As desintegrinas são proteínas de veneno de serpente usadas no estudo de processos biológicos envolvendo a adesão celular mediada por integrinas. A produção de desintegrinas recombinantes é de grande importância para tais estudos, pois podem ser obtidas de forma mais rápida, com maior rendimento e qualidade mais constante quando comparada com a obte
Publicado em: 2005