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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Low-level Laser (Light) Therapy Increases Mitochondrial Membrane Potential and ATP Synthesis in C2C12 Myotubes with a Peak Response at 3-6 h

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Ferraresi, Cleber [1, 2, 3, 4] ; Kaippert, Beatriz [1, 5] ; Avci, Pinar [1, 6] ; Huang, Ying-Ying [1, 6] ; de Sousa, Marcelo V. P. [1, 7] ; Bagnato, Vanderlei S. [3, 4] ; Parizotto, Nivaldo A. [2, 3] ; Hamblin, Michael R. [1, 6, 8]
Total Authors: 8
[1] Massachusetts Gen Hosp, Wellman Ctr Photomed, Boston, MA 02114 - USA
[2] Univ Fed Sao Carlos, Dept Phys Therapy, Lab Electrothermophototherapy, BR-13560 Sao Carlos, SP - Brazil
[3] Univ Fed Sao Carlos, Postgrad Program Biotechnol, BR-13560 Sao Carlos, SP - Brazil
[4] Univ Sao Paulo, Phys Inst Sao Carlos, Opt Grp, Sao Carlos, SP - Brazil
[5] Univ Fed Rio de Janeiro, Rio De Janeiro, RJ - Brazil
[6] Harvard Univ, Sch Med, Dept Dermatol, Boston, MA 02115 - USA
[7] Univ Sao Paulo, Inst Phys, Lab Radiat Dosimetry & Med Phys, Sao Carlos, SP - Brazil
[8] Harvard MIT Div Hlth Sci & Technol, Cambridge, MA - USA
Total Affiliations: 8
Document type: Journal article
Source: Photochemistry and Photobiology; v. 91, n. 2, p. 411-416, MAR-APR 2015.
Web of Science Citations: 35

Low-level laser (light) therapy has been used before exercise to increase muscle performance in both experimental animals and in humans. However, uncertainty exists concerning the optimum time to apply the light before exercise. The mechanism of action is thought to be stimulation of mitochondrial respiration in muscles, and to increase adenosine triphosphate (ATP) needed to perform exercise. The goal of this study was to investigate the time course of the increases in mitochondrial membrane potential (MMP) and ATP in myotubes formed from C2C12 mouse muscle cells and exposed to light-emitting diode therapy (LEDT). LEDT employed a cluster of LEDs with 20 red (630 +/- 10nm, 25mW) and 20 near-infrared (850 +/- 10nm, 50mW) delivering 28mWcm(2) for 90s (2.5Jcm(2)) with analysis at 5min, 3h, 6h and 24h post-LEDT. LEDT-6h had the highest MMP, followed by LEDT-3h, LEDT-24h, LEDT-5min and Control with significant differences. The same order (6h>3h>24h>5min> Control) was found for ATP with significant differences. A good correlation was found (r=0.89) between MMP and ATP. These data suggest an optimum time window of 3-6h for LEDT stimulate muscle cells. (AU)

FAPESP's process: 12/05919-0 - Effects of low level laser therapy on modulation of the transcriptome, immunohistochemistry of muscle tissue and physical performance of young men undergoing physical strength training
Grantee:Cleber Ferraresi
Support type: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 10/07194-7 - Use of low-level laser and light-emitting diode therapy to increase muscle performance: from in vitro and experimental studies to clinical applications
Grantee:Cleber Ferraresi
Support type: Scholarships in Brazil - Doctorate