Key result
Oxidized Lp(a) dose-dependently suppresses endothelium-dependent dilation, unlike native or oxidized LDL.
Why the study?
Does oxidized lipoprotein(a) impair endothelium-dependent dilation in isolated rabbit renal arteries?
Population
Isolated, saline-perfused, preconstricted rabbit renal arterial segments
Comparison
In vitro oxidized human lipoprotein for 150… vs Native lipoprotein, native LDL, and oxidized LDL…
Design
Preclinical
Follow-up
150 minutes (incubation time)
Authors
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Oxidized Lp(a) may impair endothelium-dependent dilation; hypothesis-generating in animal arteries and leaves open human cardiovascular relevance.
Does oxidized lipoprotein(a) impair endothelium-dependent dilation in isolated rabbit renal arteries?
Oxidized lipoprotein(a) impairs endothelium-dependent dilation more potently than oxidized LDL, likely via superoxide formation and nitric oxide inactivation.
Galle et al. (1995) studied this question. Oxidized lipoprotein(a) vs. Native lipoprotein(a), native LDL, and oxidized LDL was evaluated on Acetylcholine-induced, endothelium-dependent dilator responses. Exposure to in vitro oxidized lipoprotein(a) suppressed acetylcholine-induced endothelium-dependent dilator responses in a dose-dependent manner, whereas native and oxidized LDL had no effect.
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