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Decrease in endothelium-dependent relaxation in the mesenteric arterial bed following vascular calcium overload
D Henrion1, J M Chillon, M Hoffman
1Laboratoire de Pharmacologie Cardio-vasculaire, Faculté de Pharmacie, Nancy, France.
Life Sciences
|January 1, 1991
Summary
Vitamin D3 and nicotine treatment in rats increased arterial calcium and impaired blood vessel responses. This model helps study calcium overload
Area of Science:
- Cardiovascular research
- Vascular biology
- Calcium metabolism
Background:
- Cardiovascular calcium overload is linked to vascular dysfunction.
- Vitamin D3 and nicotine administration offers a potential model for studying this condition.
Purpose of the Study:
- To investigate the effects of a vitamin D3 plus nicotine model on rat mesenteric arteries.
- To assess the role of calcium overload in vascular endothelial dysfunction.
Main Methods:
- Young rats were treated with vitamin D3 and nicotine.
- Mesenteric arterial calcium content was measured.
- In vitro vasoconstrictor and vasodilator responses were evaluated.
Main Results:
- Treatment increased mesenteric arterial calcium.
- Vasoconstrictor responses to norepinephrine and serotonin were reduced.
- Endothelium-dependent vasodilation was impaired, while direct smooth muscle effects were unchanged.
Conclusions:
- The vitamin D3 plus nicotine model effectively increases arterial calcium.
- This model demonstrates impaired vascular endothelial function due to calcium overload.
- It serves as a valuable tool for investigating calcium's role in vascular disease.