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Platelet aggregation in spontaneous hypertension: genetic determination and correlation analysis
1Institute of Physiology, Czech Academy of Sciences, Prague.
Journal of Hypertension
|December 1, 1992
Summary
Spontaneous hypertension in rats does not correlate with platelet aggregation. This suggests that the link between platelet function and hypertension seen in population studies may be coincidental and requires further investigation in genetically defined models.
Area of Science:
- Cardiovascular Research
- Platelet Physiology
- Hypertension Genetics
Background:
- Hyper-responsive platelets are frequently observed in essential hypertension.
- Platelets may indicate contractile cell dysfunction in hypertensive individuals.
- The relationship between platelet aggregation and genetic hypertension in rats was investigated.
Purpose of the Study:
- To analyze the association between platelet aggregation and genetic hypertension in rats.
- To determine if platelet function is a reliable indicator of hypertension-related contractile cell abnormalities.
- To clarify the link between spontaneous hypertension and platelet activity.
Main Methods:
- Linear regression analysis of mean values in recombinant inbred strains.
- Evaluation of the relationship between blood pressure and adenosine diphosphate (ADP)-induced platelet aggregation.
- Utilizing spontaneously hypertensive rats (SHR) and normotensive Brown Norway (BN) rats.
Main Results:
- ADP-induced platelet aggregation was significantly lower in SHR compared to BN rats.
- Correlation analysis in recombinant inbred strains showed platelet aggregation and blood pressure are independent traits.
- No significant correlation was found between blood pressure and platelet aggregation in genetically defined rat models.
Conclusions:
- The observed link between spontaneous hypertension and platelet hypo-aggregability in SHR is likely due to chance during selective inbreeding.
- The independence of these traits in genetically defined models suggests previous population-based findings may need re-evaluation.
- Further studies using pedigree analysis in genetically defined situations are recommended to confirm alterations in platelet function in essential hypertension.