The prostaglandin I2 biosynthetic capacity of aortae from spontaneously hypertensive rats of various ages (1, 2, 3, 4, and 5 months) was investigated. An age-dependent increase in enzyme activity was observed reaching maximum by three months of age which correlated well with the age- related increase in the systolic blood pressure. These results support our notion that the enhanced aortic synthesis of the potent vasodepressor prostaglandin I2 by the spontaneously hypertensive rat likely represents an adaptive mechanism for the attenuation of the sustained elevation in blood pressure in this animal model.
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The corresponding record at NLM can be accessed at https://www.ncbi.nlm.nih.gov/pubmed/383156