Key result
Human urotensin-II acted synergistically with mildly oxidized low-density lipoprotein to significantly increase vascular smooth muscle cell DNA synthesis and proliferation.
Why the study?
Does human urotensin-II combined with mildly oxidized LDL increase vascular smooth muscle cell proliferation in rabbit aortic cells?
Population
Primary vascular smooth muscle cells isolated from the thoracic aortas of male New Zealand White rabbits
Comparison
Human urotensin-II alone or in combination with… vs Vehicle control, or other vasoactive agents…
Design
Preclinical
Follow-up
48 hours
Authors
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Hypothesis-generating for urotensin-II in atherosclerosis; leaves open translation to human disease or practice.
Does human urotensin-II combined with mildly oxidized LDL increase vascular smooth muscle cell proliferation in rabbit aortic cells?
p-value: p=<0.0001
U-II acts in synergy with mildly oxidized LDL to potently induce vascular smooth muscle cell proliferation via multiple signaling pathways, suggesting a cellular mechanism for its role in atherosclerosis.
Watanabe et al. (2006) studied Vascular smooth muscle cell proliferation (in vitro) (n=75). Human urotensin-II (U-II) and mildly oxidized low-density lipoprotein (mox-LDL) vs. Vehicle control or single agents was evaluated on [3H]Thymidine incorporation into DNA (index of VSMC proliferation) (p=<0.0001). Human urotensin-II acted synergistically with mildly oxidized low-density lipoprotein to significantly increase vascular smooth muscle cell DNA synthesis and proliferation.
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