ISSN:
1573-4919
Schlagwort(e):
blood andplasma vitamin Q
;
ubiquinone
;
coenzyme Q10
;
CoQ10
;
plasma vitamin E
;
a-tocopherol
;
antioxidants
;
oxygen burst
;
free radicals
;
membrane trauma
;
erythrocyte
;
hemolysis
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
,
Chemie und Pharmazie
,
Medizin
Notizen:
Abstract Whole blood vitamin Q (ubiquinone), plasma vitamins Q and E(alpha-(a-)tocopherol) and free cholesterol (FC) were studied before(control or base-line value, sample I) and during open chest surgery andextracorporal circulation (samples II-IV) in 10 male IHD patients. Identityexisted between control whole blood and plasma ubiquinone. During surgery anincreased discrepancy with lower plasma vitamin Q levels were seen. Controlplasma vitamins Q, E and FC averaged 0.88 ± 0.16 (SE), 12.1 ±2.2 mg × 1-1 and 0.75 ± 0.15 g × 1-1. Corresponding molarvalues were 1.02 ± 0.17, 28.1 ± 5.1 µmol × 1-1 and1.94 ± 0.74 mmol × 1-1. Vitamin Q and E decreased continuouslyand averaged 0.64 mg × 1-1 in sample IV (0.74 µmol × 1-1,p 〈 0.001) and 9.4 mg × 1-1 in sample III (21.8 µmol ×1-1, p 〈 0.001). Hemolysis in all sample IV vials, ruined all vitamin Edeterminations. When normalized for FC (NQ and NE), decreases were found tobe 17 (IV) and 12% (III), respectively. Large interindividual variationsexisted. High control NQ and NE values allowed a larger antioxidant vitamindepletion. High NQ seemed also to be a prerequisite for NE depletion. Inaddition, signs indicated an active liver vitamin Q release for patientsrich in control antioxidant values. It was suggested that the antioxidantvitamin depletion did not prevent from radical trauma to membrane structurallipids (especially omega-3 fatty acids or vitamin F1), less membranefluidity, erythrocyte fragility and hemolysis.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1023/A:1006874923181
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