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Low-level laser therapy decreases levels of lung neutrophils anti-apoptotic factors by a NF-kappaB dependent mechanism

Aimbire F, Santos FV, Albertini R, Castro-Faria-Neto HC, Mittmann J, Pacheco-Soares C.
Source: Institute of Research and Development - IP&D - UNIVAP. Av. Shishima Hifumi, 2911, CEP: 12244-000, SP, Brazil.

BACKGROUND AND OBJECTIVE: Low-level laser therapy (LLLT) is a known modulator of inflammatory process. Herein we studied the effect of 660 nm diode laser on mRNA levels of neutrophils anti-apoptotic factors in lipopolysaccharide (LPS)-induced lung inflammation.

STUDY DESIGN/METHODOLOGY: Mice were divided into 8 groups (n=7 for each group) and irradiated with energy dosage of 7.5 J/cm(2). The Bcl-xL and A1 mRNA levels in neutrophils were evaluated by Real Time-PCR (RT-PCR). The animals were irradiated after exposure time of LPS.

RESULTS: LLLT and an inhibitor of NF-kappaB nuclear translocation (BMS 205820) attenuated the mRNA levels of Bcl-xL and A1 mRNA in lung neutrophils obtained from mice subjected to LPS-induced inflammation.

CONCLUSION: LLLT reduced the levels of anti-apoptotic factors in LPS inflamed mice lung neutrophils by an action mechanism in which the NF-kappaB seems to be involved.

Low Level Laser Therapy (LLLT) Decreases Pulmonary Microvascular Leakage, Neutrophil Influx and IL-1beta Levels in Airway and Lung from Rat Subjected to LPS-Induced Inflammation

Aimbire F, Ligeiro de Oliveira AP, Albertini R, Corrêa JC, Ladeira de Campos CB, Lyon JP, Silva JA Jr, Costa MS.
Source: Instituto de Pesquisa & Desenvolvimento-IP&D, Universidade do Vale do Paraíba-UNIVAP, Av. Shishima Hifumi, 2911, CEP: 12244-000, São José dos Campos, SÃO Paulo, Brazil, This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

BACKGROUND AND OBJECTIVE: Low level laser therapy (LLLT) is a known anti-inflammatory therapy. Herein we studied the effect of LLLT on lung permeability and the IL-1beta level in LPS-induced pulmonary inflammation.

STUDY DESIGN/METHODOLOGY: Rats were divided into 12 groups (n = 7 for each group). Lung permeability was measured by quantifying extravasated albumin concentration in lung homogenate, inflammatory cells influx was determined by myeloperoxidase activity, IL-1beta in BAL was determined by ELISA and IL-1beta mRNA expression in trachea was evaluated by RT-PCR. The rats were irradiated on the skin over the upper bronchus at the site of tracheotomy after LPS.

RESULTS: LLLT attenuated lung permeability. In addition, there was reduced neutrophil influx, myeloperoxidase activity and both IL-1beta in BAL and IL-1beta mRNA expression in trachea obtained from animals subjected to LPS-induced inflammation.

CONCLUSION: LLLT reduced the lung permeability by a mechanism in which the IL-1beta seems to have an important role.

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This website contains information that has not been reviewed or approved by the FDA. Some of the claims and representations of the products contained on this site are cleared by regional regulatory bodies such as CE and Health Canada and may differ from those that are FDA 510K cleared.
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