Ubiquinol-10 and ubiquinone-10 levels in umbilical cord blood of healthy foetuses and the venous blood of their mothers.
Despite their being good markers of oxidative stress for clinical use, little is known about ubiquinol-10 (reduced coenzyme Q10) and ubiquinone-10 (oxidized coenzyme Q10) levels in foetuses and their mothers. This study investigates oxidative stress in 10 healthy maternal venous, umbilical arterial and venous bloods after vaginal delivery by measuring ubiquinol-10 and ubiquinone-10 levels. Serum ubiquinol-10 and ubiquinone-10 levels were measured by HPLC with a highly sensitive electrochemical detector. Maternal venous ubiquinol-10 and ubiquinone-10 levels were significantly higher than umbilical arterial and venous levels (all p < 0.001). However, the ubiquinone-10/total coenzyme Q10 (CoQ10) ratio, which reflects the redox status, was significantly higher in umbilical arterial and umbilical venous blood compared to maternal venous blood (all p < 0.001). The ubiquinone-10/total CoQ10 ratio was higher in umbilical arterial than in umbilical venous blood (p < 0.01). The present study demonstrated that foetuses were under higher oxidative stress than their mothers.
Matsuzaki
Masayo
M
Department of Midwifery and Women's Health, Division of Health Sciences & Nursing, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan. msumi-tky@umin.ac.jp
Haruna
Megumi
M
Hasumi
Yoko
Y
Sekine
Kyouichi
K
Tanizaki
Takashi
T
Watanabe
Etsuko
E
Murashima
Sachiyo
S
D000328:Adult; D002851:Chromatography, High Pressure Liquid; D003430:Cross-Sectional Studies; D005260:Female; D005312:Fetal Blood / Q000737:chemistry / Q000378:metabolism*; D005333:Fetus; D006801:Humans; D009035:Mothers; D011247:Pregnancy / Q000097:blood*; D014451:Ubiquinone / Q000031:analogs & derivatives* / Q000097:blood; D055815:Young Adult
D014451:Ubiquinone; C025204:Ubiquinone Q2; C003741:ubiquinol