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Abstract Title:

Hydroxytyrosol influences exercise-induced mitochondrial respiratory complex assembly into supercomplexes in rats.

Abstract Source:

Free Radic Biol Med. 2019 Jan 24 ;134:304-310. Epub 2019 Jan 24. PMID: 30685403

Abstract Author(s):

Rafael A Casuso, Saad Al-Fazazi, Agustín Hidalgo-Gutierrez, Luis Carlos López, Julio Plaza-Díaz, Ascensión Rueda-Robles, Jesus R Huertas

Article Affiliation:

Rafael A Casuso

Abstract:

Hydroxytyrosol (HT) has been demonstrated to improve mitochondrial function, both in sedentary and in exercised animals. Herein, we assessed the effects of two different doses of HT on exercise-induced mitochondrial respiratory complex (C) assembly into supercomplexes (SCs) and the relation of the potential results to OPA1 levels and oxidative stress. Wistar rats were allocated into six groups: sedentary (SED), sedentary consuming 20 mg/kg/d of HT (SED-20), sedentary consuming 300 mg/kg/d of HT (SED-300); exercised (EXE), exercised consuming 20 mg/kg/d of HT (EXE-20) and exercised consuming 300 mg/kg/d of HT (EXE-300). Animals were exercised and/or supplemented for 10 weeks, and assembly of SCs, mitochondrial oxidativestatus and expression of OPA1 were quantified in the gastrocnemius muscle. Both EXE and EXE-20 animals exhibited increased assembly of CI into SCs, but this effect was absent in EXE-300 animals. Levels of CIIIassembled into SCs were only increased in EXE-20 animals. Notably EXE-300 animals showed a decreased relative expression of s-OPA1 isoforms. Therefore, HT exerted dose-dependent effects on SC assembly in exercised animals. Although the mechanisms leading to SCs assembly in response to exercise and HT are unclear, it seems that a high HT dose can prevent SCs assembly during exercise by decreasing the expression of the s-OPA1 isoforms.

Study Type : Animal Study
Additional Links
Therapeutic Actions : Exercise : CK(2795) : AC(411)

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