Spider Venom
Mostrando 1-12 de 71 artigos, teses e dissertações.
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1. Antinociceptive effect of PnTx4(5-5), a peptide from Phoneutria nigriventer spider venom, in rat models and the involvement of glutamatergic system
ABSTRACT Background: The venom of Phoneutria nigriventer spider is a source of numerous bioactive substances, including some toxins active in insects. An example is PnTx4(5-5) that shows a high insecticidal activity and no apparent toxicity to mice, although it inhibited NMDA-evoked currents in rat hippocampal neurons. In this work the analgesic activity o
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 12/08/2019
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2. Spider venom peptides as potential drug candidates due to their anticancer and antinociceptive activities
Abstract Spider venoms are known to contain proteins and polypeptides that perform various functions including antimicrobial, neurotoxic, analgesic, cytotoxic, necrotic, and hemagglutinic activities. Currently, several classes of natural molecules from spider venoms are potential sources of chemotherapeutics against tumor cells. Some of the spider peptide to
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 03/06/2019
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3. Neuroprotective properties of RT10, a fraction isolated from Parawixia bistriata spider venom, against excitotoxicity injury in neuron-glia cultures
Abstract Background: L-Glutamate (L-Glu), the major excitatory neurotransmitter in the mammalian Central Nervous System (CNS), is essential to cognitive functions. However, when L-Glu is accumulated in large concentrations at the synaptic cleft, it can induce excitotoxicity that results in secondary damage implicated in many neurological disorders. Current
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 16/05/2019
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4. Effects of copaiba oil on dermonecrosis induced by Loxosceles intermedia venom
ABSTRACT Background: Accidents caused by spiders of the genus Loxosceles constitute an important public health problem in Brazil. The venom of Loxosceles sp induces dermonecrosis at the bite site and systemic disease in severe cases. Traditional medicine based on plant-derived products has been proven to reduce the local effects of envenomation. The present
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 25/04/2019
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5. Intravitreal injection of the synthetic peptide LyeTx I b, derived from a spider toxin, into the rabbit eye is safe and prevents neovascularization in a chorioallantoic membrane model
Abstract Background: The great diversity of molecules found in spider venoms include amino acids, polyamines, proteins and peptides, among others. Some of these compounds can interact with different neuronal receptors and ion channels including those present in the ocular system. To study potential toxicity and safety of intravitreal injection in rabbits of
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 17/12/2018
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6. Highlights in the knowledge of brown spider toxins
Abstract Brown spiders are venomous arthropods that use their venom for predation and defense. In humans, bites of these animals provoke injuries including dermonecrosis with gravitational spread of lesions, hematological abnormalities and impaired renal function. The signs and symptoms observed following a brown spider bite are called loxoscelism. Brown spi
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 16/03/2017
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7. A spider derived peptide, PnPP-19, induces central antinociception mediated by opioid and cannabinoid systems
Abstract Background Some peptides purified from the venom of the spider Phoneutria nigriventer have been identified as potential sources of drugs for pain treatment. In this study, we characterized the antinociceptive effect of the peptide PnPP-19 on the central nervous system and investigated the possible involvement of opioid and cannabinoid systems in i
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 19/01/2017
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8. Arachnids of medical importance in Brazil: main active compounds present in scorpion and spider venoms and tick saliva
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 u
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 29/09/2015
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9. The History of Venomous Spider Identification, Venom Extraction Methods and Antivenom Production: a Long Journey at the Butantan Institute, São Paulo, Brazil
Abstract The article provides a historical report on venomous spider identification, venom obtainment methods and serum production at the Butantan Institute, São Paulo, Brazil. It is based on literature and personnal experience during the last 50 years. This result is the discovery that the real species causing potential severe human accide
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 11/08/2015
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10. A comparison between the recombinant expression and chemical synthesis of a short cysteine-rich insecticidal spider peptide
Abstract Background: The choice between heterologous expression versus chemical synthesis for synthesizing short cysteine-rich insecticidal peptides from arthropods may impact the obtainment of yields and well-folded bioactive molecules for scientific research. Therefore, two recombinant expression systems were compared to
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 11/08/2015
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11. Detection and identification of huwentoxin-IV interacting proteins by biotin-avidin chemistry combined with mass spectrometry
Background : Numerous spider toxins are of interest as tools for neurophysiological research or as lead molecules for the development of pharmaceuticals and insecticides. Direct detection and identification of the interacting proteins of a spider toxin are helpful for its action-mechanism analysis and practical application. The present study employed a com
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 20/05/2014
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12. Purification and characterization of a hyaluronidase from venom of the spider Vitalius dubius (Araneae, Theraphosidae)
BackgroundVenom hyaluronidase (Hyase) contributes to the diffusion of venom from the inoculation site. In this work, we purified and characterized Hyase from the venom of Vitalius dubius (Araneae, Theraphosidae), a large theraphosid found in southeastern Brazil. Venom obtained by electrical stimulation of adult male and female V. dubius was initially fractio
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 04/02/2014