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  • 1
    ISSN: 1432-1440
    Keywords: Atherogenese ; Arterieller Hochdruck ; Cholesteringefütterten Kaninchen ; Cholesterin-Ester ; Phospholipide ; Atherogenesis ; Hypertension ; Cholesterol-fed rabbits ; Cholesterol Ester ; Phospholipid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The effect of prior hypertension on the in vitro incorporation of [1-14C]-oleate into phospholipid and cholesterol ester in aortae from cholesterolfed and normal fed rabbits was studied. Incorporation of [1-14C]-oleate into phospholipid was not increased in aortae from either hypertensive normal-fed or hypertensive cholesterol-fed rabbits when compared to the appropriate normotensive controls. In the normal-fed rabbits, incorporation of [1-14C]-oleate into cholesterol ester was increased by hypertension in all aortic regions. In cholesterol-fed rabbits cholesterol esterification was found to be proportional to the intimal cholesterol concentration, irrespective of the prior blood pressure or the particular aortic region studied. It is concluded that the increased lipid synthesis in atherosclerotic vessels from hypertensive rabbits is a consequence of the increased lipid accumulation produced by hypertension and not the result of hypertension directly stimulating arterial wall metabolism.
    Notes: Zusammenfassung Der Einfluß von früherem arteriellen Hochdruck auf den in-vitro Einbau (1-14C)-Oleat in Phospholipide und Cholesterin-Ester in Aorten von Cholesterin-gefütterten und normal-gefütterten Kaninchen wurde untersucht. Im Vergleich zu den respektiven normotensiven Kontroll-Tieren stieg der Einbau (1-14C)-Oleat in Phospholipide in Aorten von hypertensiv normal-gefütterten und hypertensiv Cholesterin-gefütterten Kaninchen nicht an. In normal-gefütterten Kaninchen wurde der Einbau der (1-14C)-Oleat in allen Gegenden der Aorta mit Hochdruck vermehrt. Bei Cholesterin-gefütterten Kaninchen wurde die Cholesterin-Ester-Synthese der jeweiligen intimalen Cholesterin-Konzentration angemessen, unabhängig von welcher Aorten-Gegend untersucht wurde oder von der Höhe des früheren Blutdrucks. Daraus folgert, daß die gesteigerte Lipid-Synthese in atherosklerotischen Gefäßen hypertensiver Kaninchen eine Folge gesteigerter Lipidanhäufung ist, und nicht auf einen vom Hochdruck direkt vermehrten Arterienwandstoffwechsel zurückzuführen ist.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of applied physiology 68 (1994), S. 470-476 
    ISSN: 1439-6327
    Keywords: Blood ; Viscosity ; Athletes ; Haemoglobin ; Ergometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract This study investigated the relationships between resting whole blood viscosity (WBV), haemoglobin concentration (HGB), haematocrit (HCT), and performance in 25 highly-trained national squad rowers (11 women and 14 men). The WBV and HGB were measured at rest prior to a 2500 m simulated race on a Concept rowing ergometer when performance (P) was measured by average velocity. A group of 12 rowers were measured on just one occasion, another 11 were measured twice with an intervening 5 weeks of continued training and 2 were measured three times, the third test after another 4 weeks. Regression analyses making simultaneous use of both intra- and interindividual data indicated a significant inverse relationship between P and WBV (at both high and low shear rates), a relationship which was strengthened after statistically controlling for the effects of HGB, this effect being slightly more significant than HCT. A significant positive regression also emerged between P and HGB, but only after statistically controlling for the influence of WBV at high shear rate. Overall, stronger relationships were demonstrated in the male rowers compared with the female. These data, in the light of previous evidence that fitter people tend to have lower WBV, would indicate that blood rheology unrelated to HGB (or HCT) is related to performance in relatively homogeneous and already highly-trained athletes.
    Type of Medium: Electronic Resource
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