Are the mitochondrial respiratory complexes blocked by NO the targets for the laser and LED therapy?
Lasers Med Sci
; 30(1): 173-80, 2015 Jan.
Article
en En
| MEDLINE
| ID: mdl-25118663
ABSTRACT
Effects of laser (442 and 532 nm) and light-emitting diode (LED) (650 nm) radiation on mitochondrial respiration and mitochondrial electron transport rate (complexes II-III and IV) in the presence of nitric oxide (NO) were investigated. It was found that nitric oxide (300 nM-10 µM) suppresses mitochondrial respiration. Laser irradiation of mitochondria (442 nm, 3 J cm(-2)) partly restored mitochondrial respiration (approximately by 70 %). Irradiation with green laser (532 nm) or red LED (650 nm) in the same dose had no reliable effect. Evaluation of mitochondrial electron transport rate in complexes II-III and IV and effects of nitric oxide demonstrated almost similar sensitivity of complex II-III and IV to NO, with approximately 50 % inhibition at NO concentration of 3 µM. Subsequent laser or LED irradiation (3 J cm(-2)) showed partial recovery of electron transport only in complex IV and only under irradiation with blue light (442 nm). Our results support the hypothesis of the crucial role of cytochrome c oxidase (complex IV) in photoreactivation of mitochondrial respiration suppressed by NO.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Mitocondrias Hepáticas
/
Complejo IV de Transporte de Electrones
/
Complejo III de Transporte de Electrones
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Terapia por Luz de Baja Intensidad
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Complejo II de Transporte de Electrones
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Óxido Nítrico
Límite:
Animals
Idioma:
En
Revista:
Lasers Med Sci
Asunto de la revista:
BIOTECNOLOGIA
/
RADIOLOGIA
Año:
2015
Tipo del documento:
Article