Effect of low-level light therapy before radiotherapy in oral squamous cell carcinoma: An in vitro study

Radiation therapy for head and neck squamous cell carcinoma (HNSCC) is associated with several complications. Although photobiomodulation (PBM) has radioprotective effects in normal tissue, it could also enhance the growth of neoplastic cells. Thus, the present study aimed to investigate the cellula...

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Veröffentlicht in:Lasers in medical science 2022-12, Vol.37 (9), p.3527-3536
Hauptverfasser: Tabosa, Angeliny Tamiarana Lima, Souza, Marcela Gonçalves, de Jesus, Sabrina Ferreira, Rocha, Danielle Ferreira, Queiroz, Lorena dos Reis Pereira, Santos, Eloá Mangabeira, Guimarães, Victor Hugo Dantas, Andrade, Luciano Alves de Araújo, Santos, Sérgio Henrique, de Paula, Alfredo Maurício Batista, de Souza, Paulo Eduardo Narcizo, Farias, Lucyana Conceição, Guimarães, André Luiz Sena
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container_end_page 3536
container_issue 9
container_start_page 3527
container_title Lasers in medical science
container_volume 37
creator Tabosa, Angeliny Tamiarana Lima
Souza, Marcela Gonçalves
de Jesus, Sabrina Ferreira
Rocha, Danielle Ferreira
Queiroz, Lorena dos Reis Pereira
Santos, Eloá Mangabeira
Guimarães, Victor Hugo Dantas
Andrade, Luciano Alves de Araújo
Santos, Sérgio Henrique
de Paula, Alfredo Maurício Batista
de Souza, Paulo Eduardo Narcizo
Farias, Lucyana Conceição
Guimarães, André Luiz Sena
description Radiation therapy for head and neck squamous cell carcinoma (HNSCC) is associated with several complications. Although photobiomodulation (PBM) has radioprotective effects in normal tissue, it could also enhance the growth of neoplastic cells. Thus, the present study aimed to investigate the cellular response of oral squamous cell carcinoma with pre-exposure to low-level phototherapy before radiotherapy. SCC9, Cal-27, A431, and HaCaT cell lines were subjected to low-level light therapy and radiotherapy. The cells were treated with a single energy density (300 J/cm 2 ) of a light-emitting diode (660 nm) prior to ionizing radiation at different doses (0, 2, 4, and 6 Gy). After 24 h, wound scratch, proliferation, clonogenic cell survival, cell death, and reactive oxygen species (ROS) analyses were performed to evaluate cell response. The cell lines pre-exposed to PBM at the analyzed dosage were radiosensitive. The treatment significantly reduced cell proliferation and clonogenic cell survival. Migration and cell death assays also revealed positive results, with the treatment group showing lower rate of migration and higher cell death than did the control group. Moreover, PBM effectively increased the intracellular levels of ROS. PBM at 300 J/cm 2 is a promising radiosensitizing modality to reduce the radiation dose and avoid the intolerable side effects of radiotherapy for HNSCC, thus increasing the probability of successful treatment. However, further studies are needed to support and confirm the results.
doi_str_mv 10.1007/s10103-022-03632-x
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subjects Apoptosis
Cancer
Cell death
Cell migration
Cell proliferation
Cell survival
Complications
Dentistry
Head & neck cancer
Head and neck carcinoma
Intracellular levels
Ionizing radiation
Lasers
Light emitting diodes
Light therapy
Medicine
Medicine & Public Health
Mortality
Optical Devices
Optics
Oral cancer
Oral carcinoma
Oral squamous cell carcinoma
Original Article
Photonics
Phototherapy
Quantum Optics
Radiation dosage
Radiation therapy
Reactive oxygen species
Side effects
Squamous cell carcinoma
Survival
title Effect of low-level light therapy before radiotherapy in oral squamous cell carcinoma: An in vitro study
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