Prophylactic application of laser light restores L-FABP expression in the livers of rats submitted to partial ischemia

• Published in: Clinics (São Paulo, Brazil) Vol. 73; p. e113
• Main Authors: Vilalva, Kelvin Henrique, Figueira, Rebeca Lopes, Silveira, Marina, Graf, Catarina, Gonçalves, Frances Lanhellas, Sbragia, Lourenço, Gomes, Maria Cecília, Mumic, Fabrícia, Vollet-Filho, José Dirceu, Bagnato, Vanderlei Salvador, D'Albuquerque, Luiz Augusto Carneiro, Castro-e-Silva, Orlando
• Format: Journal Article
• Language: English
• Published: Brazil Elsevier España, S.L.U 01-01-2018; Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo; Faculdade de Medicina / USP; Elsevier España
• Subjects: Alanine Transaminase - blood; Animals; Aspartate Aminotransferases - blood; Blotting, Western; Fatty Acid-Binding Proteins - analysis; Fatty Acid-Binding Proteins - metabolism; Ischemia; Ischemic Preconditioning - methods; L-FABP; Laser Therapy; Liver - blood supply; Liver - metabolism; Liver - radiation effects; Low-Level Light Therapy - methods; Malondialdehyde - analysis; Malondialdehyde - radiation effects; MEDICINE, GENERAL & INTERNAL; Mitochondrial Membranes - drug effects; Mitochondrial Swelling - radiation effects; Original; Rats, Wistar; Reperfusion Injury; Reperfusion Injury - prevention & control; Reproducibility of Results; L-FABP; Ischemia; Reperfusion Injury; Laser Therapy
• DOI: 10.6061/clinics/2018/e113
• EISSN: 1980-5322
• ISSN: 1807-5932; 1980-5322

The objective of the present study was to evaluate the protective effect of pre-conditioning treatment with laser light on hepatic injury in rats submitted to partial ischemia using mitochondrial function and liver fatty acid binding protein as markers.
Rats were divided into four groups (n=5): 1) Control, 2) Control + Laser, 3) Partial Ischemia and 4) Partial Ischemia + Laser. Ischemia was induced by clamping the hepatic pedicle of the left and middle lobes of the liver for 60 minutes. Laser light at 660 nm was applied to the liver immediately prior to the induction of ischemia at 22.5 J/cm2, with 30 seconds of illumination at five individual points. The animals were sacrificed after 30 minutes of reperfusion. Blood and liver tissues were collected for analysis of mitochondrial function, determination of malondialdehyde and analysis of fatty acid binding protein expression by Western blot.
Mitochondrial function decreased in the Partial Ischemia group, especially during adenosine diphosphate-activated respiration (state 3), and the expression of fatty acid binding protein was also reduced. The application of laser light prevented bioenergetic changes and restored the expression of fatty acid binding protein.
Prophylactic application of laser light to the livers of rats submitted to partial ischemia was found to have a protective effect in the liver, with normalization of both mitochondrial function and fatty acid binding protein tissue expression.