Renata Graciele Zanon

Dr. Renata Graciele Zanon

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Research Focus & Metrics

Academic Career Length

21Years (2006-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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24 May 2010 in Journal of Neuroinflammation
Verified
Journal Article
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AEAmanda Emirandetti
Amanda Emirandetti
GSGustavo Simões
Gustavo Simões
RZRenata Graciele Zanon
Renata Graciele Zanon
Alexandre OliveiraAlexandre Oliveira
Alexandre Oliveira
Background: Astrocytes play a major role in preserving and restoring structural and physiological integrity following injury to the nervous system. After peripheral axotomy, reactive gliosis propagates within adjacent spinal segments, influenced by the local synthesis of nitric oxide (NO). The present work investigated the importance of inducible nitric oxide synthase (iNOS) activity in acute and late glial responses after injury and in major histocompatibility complex class I (MHC I) expression and synaptic plasticity of inputs to lesioned alpha motoneurons. Methods: In vivo analyses were carried out using C57BL/6J-iNOS knockout (iNOS-/-) and C57BL/6J mice. Glial response after axotomy, glial MHC I expression, and the effects of axotomy on synaptic contacts were measured using immunohistochemistry and transmission electron microscopy. For this purpose, 2-month-old animals were sacrificed and fixed one or two weeks after unilateral sciatic nerve transection, and spinal cord sections were incubated with antibodies against classical MHC I, GFAP (glial fibrillary acidic protein - an astroglial marker), Iba-1 (an ionized calcium binding adaptor protein and a microglial marker) or synaptophysin (a presynaptic terminal marker). Western blotting analysis of MHC I and nNOS expression one week after lesion were also performed. The data were analyzed using a two-tailed Student's t test for parametric data or a two-tailed Mann-Whitney U test for nonparametric data. Results: A statistical difference was shown with respect to astrogliosis between strains at the different time points studied. Also, MHC I expression by iNOS-/- microglial cells did not increase at one or two weeks after unilateral axotomy. There was a difference in synaptophysin expression reflecting synaptic elimination, in which iNOS-/- mice displayed a decreased number of the inputs to alpha motoneurons, in comparison to that of C57BL/6J. Conclusion: The findings herein indicate that iNOS isoform activity influences MHC I expression by microglial cells one and two weeks after axotomy. This finding was associated with differences in astrogliosis, number of presynaptic terminals and synaptic covering of alpha motoneurons after lesioning in the mutant mice.

1 November 2018 in Neurochemistry International
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Journal Article
Closed access
AOAriadne de Almeida Branco Oliveira
Ariadne de Almeida Branco Oliveira
NMNayara de Freitas Martins Melo
Nayara de Freitas Martins Melo
ÉVÉrica dos Santos Vieira
Érica dos Santos Vieira
PNPedro Augusto Silva Nogueira
Pedro Augusto Silva Nogueira
ACAndressa Coope
Andressa Coope
RZRenata Graciele Zanon
Renata Graciele Zanon

1 January 2006 in Acta Ortopedica Brasileira
Verified
Journal Article
Open access
RZRenata Graciele Zanon
Renata Graciele Zanon
ABAdriana Kundrat Brasil
Adriana Kundrat Brasil
MIMarta Imamura
Marta Imamura
Neste trabalho avaliou-se a eficácia do ultra-som contínuo e alta intensidade como tratamento na fasciíte plantar. Foram avaliadas 22 pessoas, com dor a mais de seis meses, através de questionário funcional e escala visual para a dor no primeiro apoio matinal. Vinte e sete pés foram distribuídos nos grupos: grupo 1 (alongamento + ultra-som desligado) e grupo 2 (alongamento + ultra-som 2 w/cm²). Após 15 sessões de tratamento, foi realizada análise dos valores absolutos e das porcentagens de melhora das variáveis coletadas. Houve melhora funcional para os dois grupos, sem diferença entre eles. A análise dos valores absolutos de intensidade de dor (primeira, oitava e última sessão) mostrou semelhança entre os grupos. A porcentagem de melhora nas 15 sessões não apresentou diferença entre os grupos. Esta porcentagem também foi calculada para dois períodos (antes e após a oitava sessão). Notou-se que a porcentagem de melhora das 15 sessões do grupo2 (46,5%) foi inferior à porcentagem das oito primeiras sessões do grupo1 (54,6%). Portanto, o ultra-som contínuo com alta intensidade não acrescentou ganhos em relação à função e à dor; além disso, apenas a realização de alongamentos específicos foi eficaz para a redução de mais de 50% da dor na fasciíte plantar crônica.

1 June 2016 in Virus Research
Verified
Journal Article
Closed access
AZAdriano Lara Zuza
Adriano Lara Zuza
HBHeber Leão Silva Barros
Heber Leão Silva Barros
TOThelma Fátima de Mattos Silva Oliveira
Thelma Fátima de Mattos Silva Oliveira
JCJuliana Helena Chavez-Pavoni
Juliana Helena Chavez-Pavoni
RZRenata Graciele Zanon
Renata Graciele Zanon

1 September 2021 in Brain Research Bulletin
Verified
Journal Article
Closed access
TOTárika Gonçalves Do Carmo Oliveira
Tárika Gonçalves Do Carmo Oliveira
ASAna Cláudia Moreira dos Santos
Ana Cláudia Moreira dos Santos
AAAlex Dias Assis
Alex Dias Assis
RBRaphael Teixeira Borges
Raphael Teixeira Borges
JSJéssica Regina da Costa Silva
Jéssica Regina da Costa Silva
RZRenata Graciele Zanon
Renata Graciele Zanon

1 January 2020 in Journal of Chemical Neuroanatomy
Verified
Journal Article
Closed access
PNPedro Augusto Silva Nogueira
Pedro Augusto Silva Nogueira
MPMiriam Pimenta Pereira
Miriam Pimenta Pereira
JSJeferson José Gomes Soares
Jeferson José Gomes Soares
JGJuliana Gomes
Juliana Gomes
DRDaniele Lisboa Ribeiro
Daniele Lisboa Ribeiro
RZRenata Graciele Zanon
Renata Graciele Zanon