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)

Projetos de Pesquisa
Unidades Organizacionais
Cargo

Resultados de Busca

Agora exibindo 1 - 10 de 26
  • Artigo IPEN-doc 26265
    Characterization and evaluation of the enzymatic activity of tetanus toxin submitted to gamma radiation by Cobalt 60
    2019 - SARTORI, GISELLE P.; COSTA, ANDREA; MACARINI, FERNANDA L.S.; MARIANO, DOUGLAS O.C.; PIMENTA, DANIEL C.; SPENCER, PATRICK J.; GALISTEO JUNIOR, ANDRES J.
    Tetanus is a neurological disease which blocks the inhibitory neurotransmitters liberation. Also treatment does not cure the disease, and its main form of prevention is through vaccination. The vaccine is produced by the inactivation of tetanic toxin (TeNT) with formaldehyde, which may cause side effects. An alternative way is the use of ionizing radiation for inactivation of the toxin and also to improve the potential immunogenic response and to reduce the pos-vaccination side effects. Therefore, the aim of this study was to characterize the TeNT structure after different doses of ionizing radiation of Cobalt 60, and also to assess the enzymatic activity after the radiation. SDS PAGE and MALDI-TOF analysis revealed gradual modification on the TeNT structure according to doses increase. Also, fragmentation and possible aggregations of the protein fragments were observed in higher doses. In the analysis of peptide preservation by enzymatic digestion and mass spectrometry, there was a slight modification in the recognition up to the dose of 4 kGy at subsequent doses, recognition was minimal. The analysis of the enzymatic activity by fluorescence showed a 35 % attenuation in the activity even at higher doses. In the antigenic evaluation performed by ELISA and Western Blot, anti-TeNT antibodies were detected against the irradiated toxins at the different doses, with a gradual decrease as the dose increased, but remaining at satisfactory levels, indicating the possibility of possible use as an immunogen, however, studies of enzymatic activity on higher should be further analyzed.
  • Artigo IPEN-doc 24156
    Previous 60-CO radiation from Paratrygon aiereba mucus induces the production of highly responsive antibodies and a better immune response in mice
    2017 - THOMAZI, GABRIELA O.C.; COSTA, ANDREA da; RODRIGUES, JAQUELINE P.; ALVES, GLAUCIE J.; TURIBIO, THOMPSON de O.; ROCHA, ANDRE M.; AIRES, RAQUEL da S.; JACOME, LARISSA B.S.; SEIBERT, CARLA S.; SPENCER, PATRICK J.; GALISTEO JUNIOR, ANDRES J.; ANDRADE JUNIOR, HEITOR F. de
    Wounds from stinging freshwater stingrays are painful, difficult to heal and cause extensive necrosis and systemic phenomena. The treatment is symptomatic, of low efficiency and there is no therapy, which causes more suffering to the injured. This study aimed to evaluate the immune response induced by the native or irradiated by 60-Co gamma from Paratrygon aiereba mucus. IPEN’s Committee on Ethics in the Use of Animals (n.º126/2013) and lanes captured under license from the Chico Mendes Institute for Biodiversity Conservation (n.º6781-1/2014) approved this research. For the assays, sera from Swiss mice previously immunized against native or irradiated mucus were used. The proliferation of splenic B cells in response to mucus was evaluated by the In Vitro Induced Antibody Production method and serum and splenic cytokines were also quantified. Our data demonstrate that the irradiated mucus of P. aiereba induces greater production of antibodies and more immunological memory in the mice. Spleen cells from animals immunized against irradiated mucus produced IFN-γ, TNF-α and IL-10, and serum TNF-α (immunized group against irradiated mucus) and IL-6 and IL-17 (immunized group against native mucus). The results corroborate the use of ionizing radiation, with production of highly responsive antibodies and better immune response, besides proving that Paratrygon aiereba mucus is capable of stimulating cellular and humoral adaptive immune response, contributing to the continuity of associated investigations.
  • Artigo IPEN-doc 21107
    Comparative nephrotoxicity of native or Co-60 gamma rays irradiated crotoxin in mice
    2015 - ROCHA, ANDRE M.; ROCHA, JOSEFA M.N.; MAGALHAES FILHO, ASTERIO S.; ALVES, GLAUCIE J.; AIRES, RAQUEL da S.; TURIBIO, THOMPSON O.; THOMAZI, GABRIELA O.C.; SPENCER, PATRICK J.; NASCIMENTO, NANCI do
  • Artigo IPEN-doc 21030
    Humoral immune response against native or sup(60)Co irradiated venm and mucus from stingray Paratrygon aiereba
    2015 - THOMAZI, GABRIELA O.C.; ALVES, GLAUCIE J.; AIRES, RAQUEL da S.; TURBIO, THOMPSON de O.; ROCHA, ANDRE M.; SEIBERT, CARLA S.; SPENCER, PATRICK J.; NASCIMENTO, NANCI do
  • Artigo IPEN-doc 07248
    Effects of sup(60)Co radiation on bothropstoxin-1 structure
    2000 - SPENCER, P.J.; BYME, M.; NASCIMENTO, N.; ROGERO, J.R.; SMITH, L.A.
  • Artigo IPEN-doc 13685
    Study of resveratrol stability immobilization on poly vinyl pyrrolidone hydrogel dressing for dermatological use
    2008 - MOMESSO, ROBERTA G.R.A.P.; MORENO, CAROLINA S.; ROGERO, SIZUE O.; ROGERO, JOSE R.; SPENCER, PATRICK J.; LUGAO, ADEMAR B.
  • Artigo IPEN-doc 10724
    Influence of reactive radicals OH and Esup(-)sub(AQ) in irradiation of protein in aqueous solutions
    2005 - BACETI, A.A.; CESARE, M.; SPENCER, P.J.; NASCIMENTO, N.
  • Artigo IPEN-doc 10775
    Evaluation of toxic activity loss and maintenance of immunological properties of crotoxin after gamma irradiation
    2005 - SILVA, M.C.S.; SPENCER, P.J.; ALVES, J.B.; NASCIMENTO, N.
  • Artigo IPEN-doc 10737
    Immune response against bothropstoxin-I irradiated with sup(60) gamma rays
    2005 - BAPTISTA, J.A.; SPENCER, P.J.; HIGA, O.Z.; ANDRADE JUNIOR, H.F.; CESARE, M.S.; CAMPOS, L.A.; NASCIMENTO, N.
  • Artigo IPEN-doc 19269
    Structural analysis of irradiated crotoxin by spectroscopic techniques
    2013 - OLIVEIRA, KARINA C. de; FUCASE, TAMARA M.; SILVA, ED CARLOS S.E.; CHAGAS, BRUNO B.; BUCHI, ALISSON T.; VIALA, VINCENT L.; SPENCER, PATRICK J.; NASCIMENTO, NANCI do