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Lasers in Medical Science
Published in: Lasers in Medical Science 1/2018

01-01-2018 | Original Article

cDNA microarray analysis of human keratinocytes cells of patients submitted to chemoradiotherapy and oral photobiomodulation therapy: pilot study

Authors: Heliton S. Antunes, Gabriel Wajnberg, Marcos B. Pinho, Natasha Andressa Nogueira Jorge, Joyce Luana Melo de Moraes, Claudio Gustavo Stefanoff, Daniel Herchenhorn, Carlos M. M. Araújo, Celia Maria Pais Viégas, Mariana P. Rampini, Fernando L. Dias, Patricia Savio de Araujo-Souza, Fabio Passetti, Carlos G. Ferreira

Published in: Lasers in Medical Science | Issue 1/2018

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Abstract

Oral mucositis is an acute toxicity that occurs in patients submitted to chemoradiotherapy to treat head and neck squamous cell carcinoma. In this study, we evaluated differences in gene expression in the keratinocytes of the oral mucosa of patients treated with photobiomodulation therapy and tried to associate the molecular mechanisms with clinical findings. From June 2009 to December 2010, 27 patients were included in a randomized double-blind pilot study. Buccal smears from 13 patients were obtained at days 1 and 10 of chemoradiotherapy, and overall gene expression of samples from both dates were analyzed by complementary DNA (cDNA) microarray. In addition, samples from other 14 patients were also collected at D1 and D10 of chemoradiotherapy for subsequent validation of cDNA microarray findings by qPCR. The expression array analysis identified 105 upregulated and 60 downregulated genes in our post-treatment samples when compared with controls. Among the upregulated genes with the highest fold change, it was interesting to observe the presence of genes related to keratinocyte differentiation. Among downregulated genes were observed genes related to cytotoxicity and immune response. The results indicate that genes known to be induced during differentiation of human epidermal keratinocytes were upregulated while genes associated with cytotoxicity and immune response were downregulated in the laser group. These results support previous clinical findings indicating that the lower incidence of oral mucositis associated with photobiomodulation therapy might be correlated to the activation of genes involved in keratinocyte differentiation.
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Metadata
Title
cDNA microarray analysis of human keratinocytes cells of patients submitted to chemoradiotherapy and oral photobiomodulation therapy: pilot study
Authors
Heliton S. Antunes
Gabriel Wajnberg
Marcos B. Pinho
Natasha Andressa Nogueira Jorge
Joyce Luana Melo de Moraes
Claudio Gustavo Stefanoff
Daniel Herchenhorn
Carlos M. M. Araújo
Celia Maria Pais Viégas
Mariana P. Rampini
Fernando L. Dias
Patricia Savio de Araujo-Souza
Fabio Passetti
Carlos G. Ferreira
Publication date
01-01-2018
Publisher
Springer London
Published in
Lasers in Medical Science / Issue 1/2018
Print ISSN: 0268-8921
Electronic ISSN: 1435-604X
DOI
https://doi.org/10.1007/s10103-017-2313-8

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