Key result
Oral nicotine reduces iliac vascular resistance in rats while equivalent tobacco smoke has no effect.
Why the study?
The differential effects of chronic nicotine consumption by oral administration versus tobacco smoke on iliac vascular resistance in rats were unclear.
Supports route-dependent nicotine effects in rat models; hypothesis-generating and should not yet inform clinical practice.
In summary these studies have demonstrated that chronic nicotine consumption by oral administration elicits a reduction in vascular resistance within the iliac circulation of the rat. The mechanism appears to involve a change in the vascular architecture as opposed to modification of vascular tone. By contrast long-term consumption of an equivalent amount of nicotine via tobacco smoke had no significant effect.
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Richardson et al. (1979) studied this question. Chronic nicotine consumption by oral administration vs. Tobacco smoke was evaluated on Iliac vascular resistance. Chronic oral nicotine consumption reduced iliac vascular resistance in rats, whereas an equivalent amount of nicotine via tobacco smoke had no significant effect.
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