Low level laser therapy modulates kinin receptors mRNA expression in the subplantar muscle of rat paw subjected to carrageenan-induced inflammation

Low level laser therapy (LLLT) has been used clinically in order to treat inflammatory processes. In this work, we evaluated if LLLT alters kinin receptors mRNA expression in the carrageenan-induced rat paw edema. Experimental groups were designed as followed: A1 (Control-saline), A2 (Carrageenan-on...

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Bibliographic Details
Published in:International immunopharmacology 2008-02, Vol.8 (2), p.206-210
Main Authors: Bortone, F., Santos, H.A., Albertini, R., Pesquero, J.B., Costa, M.S., Silva, J.A.
Format: Article
Language:English
Subjects:
Animals
B1 and B2 receptors
Carrageenan
Edema - metabolism
Edema - radiotherapy
Kinins
Low level laser therapy
Low-Level Light Therapy
Male
Muscle, Skeletal - metabolism
Rats
Rats, Wistar
Receptor, Bradykinin B1 - genetics
Receptor, Bradykinin B2 - genetics
RNA, Messenger - analysis
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Summary:Low level laser therapy (LLLT) has been used clinically in order to treat inflammatory processes. In this work, we evaluated if LLLT alters kinin receptors mRNA expression in the carrageenan-induced rat paw edema. Experimental groups were designed as followed: A1 (Control-saline), A2 (Carrageenan-only), A3 (Carrageenan+laser 660 nm) and A4 (Carrageenan+laser 684 nm). Edema was measured by a plethysmometer. Subplantar tissue was collected for kinin receptors mRNA quantification by Real time-PCR. LLLT of both 660 and 684 nm wavelengths administrated 1 h after carrageenan injection was able to promote the reduction of edema produced by carrageenan. In the A2 group, B1 receptor expression presented a significantly increase when compared to control group. Kinin B1 receptor mRNA expression significantly decreased after LLLT's 660 or 684 nm wavelength. Kinin B2 receptor mRNA expression also diminished after both laser irradiations. Our results suggest that expression of both kinin receptors is modulated by LLLT, possibly contributing to its anti-inflammatory effect.
ISSN:1567-5769
1878-1705
DOI:10.1016/j.intimp.2007.09.004