PATRICK JACK SPENCER

Resumo

Possui graduação em Ciências Biológicas pela Universidade Presbiteriana Mackenzie (1991), mestrado em Tecnologia Nuclear pela Universidade de São Paulo (1995) e doutorado em Tecnologia Nuclear pela Universidade de São Paulo (2000) tendo sido bolsista sandwich no US Army Medical Research Institute for Infeccious Diseases (98-99). É responsável pelo Biotério de criação e manutenção de animais de laboratório do IPEN. Tem experiência na área de Bioquímica, com ênfase em Proteínas, atuando principalmente nos seguintes temas: veneno, proteínas, bothrops, irradiação e miotoxina.(Texto extraído do Currículo Lattes em 22 dez. 2021)

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  • Artigo IPEN-doc 26495
    Proteomic analysis of soluble proteins retrieved from Duttaphrynus melanostictus skin secretion by IEx-batch sample preparation
    2019 - MARIANO, DOUGLAS O.C.; PREZOTTO-NETO, JOSE P.; SPENCER, PATRICK J.; SCIANI, JULIANA M.; PIMENTA, DANIEL C.
    Amphibians display a toxic secretion that works as chemical defenses against predators and/or microorganisms that is stored in specialized glands located in the tegument. For some animals, such glands have accumulated in specific regions of the body and formed prominent structures known as macroglands. The Bufonidae family displays conspicuous macroglands in a post-orbital position, termed parotoids, which secretions are known to be extremely viscous and rich in alkaloids and steroids. Few proteins have been described in this material, though. Mainly, because of the difficulties to handle such biological matrix. In this context, we have performed a proteomic study on the parotoid macrogland secretion of the Asian bufonid Duttaphrynus melanostictus. By employing the Ion-Exchange (IEx)-batch chromatography (anionic, cationic and both) we obtained six fractions - bound and unbound – that were submitted to an in solution-trypsin digestion followed by LC-MS/MS. Proteins related to: antioxidant activity, binding processes (carbohydrate/lipid/protein), energy metabolism, hydrolases, lipid metabolism and membrane traffic were identified. Moreover, IEx was able to preserve the biological activity of the retrieved proteins (peptidasic). The current study increases the knowledge on the proteins present in the bufonids parotoid macrogland secretion, providing a better understanding of the physiological role played by such molecules. Significance: The current approach allowed a detailed proteomic analysis of the several proteins synthesized in the D. melanostictus parotoid macrogland (Bufonidae) that are secreted into the skins, but embedded within a complex viscous biological matrix. Moreover, our results aim to increase the knowledge on the biological role played by such proteins at the skin.
  • Artigo IPEN-doc 21327
    Venomics of the Australian eastern brown snake (Pseudonaja textilis): Detection of new venom proteins and splicing variants
    2015 - VIALA, VINCENT L.; HILDEBRAND, DIANA; TRUSCH, MARIA; FUCASE, TAMARA M.; SCIANI, JULIANA M.; PIMENTA, DANIEL C.; ARNI, RAGHUVIR K.; SCHLUTER, HARTMUT; BETZEL, CHRISTIAN; MIRTSCHIM, PETER; DUNSTAN, NATHAN; SPENCER, PATRICK J.
  • Artigo IPEN-doc 21288
    Proteomic analysis of the rare Uracoan rattlesnake Crotalus vegrandis venom: Evidence of a broad arsenal of toxins
    2015 - VIALA, VINCENT L.; HILDEBRAND, DIANA; FUCASE, TAMARA M.; SCIANI, JULIANA M.; PREZOTTO NETO, JOSE P.; RIEDNER, MARIA; SANCHES, LEONARDO; NISHIMURA, PAULA J.; OGUIURA, NANCY; PIMENTA, DANIEL C.; SCHLUTER, HARTMUT; BETZEL, CHRISTIAN; ARNI, RAGHUVIR K.; SPENCER, PATRICK J.