What effect does the overexpression of PRR have on blood pressure through an angiotensin II-dependent pathway?

• A. It decreases blood pressure
• B. It has no effect on blood pressure
• C. It increases blood pressure
• D. It stabilizes blood pressure

Answer: (C)

The overexpression of PRR (promoter region of renin) is linked to increased blood pressure through an angiotensin II-dependent pathway. Angiotensin II is a potent vasoconstrictor that plays a crucial role in regulating blood pressure by constricting blood vessels and promoting salt and water retention by the kidneys. When PRR is overexpressed, it enhances the sensitivity to angiotensin II, leading to amplified vasoconstriction and an increase in blood volume. This combination results in a rise in blood pressure.

Additionally, PRR is involved in various signaling pathways that influence cardiovascular functions, including promoting hypertrophic responses in cardiac cells. By exacerbating these pathways, overexpression of PRR can further contribute to the elevation of blood pressure. Therefore, the correct answer reflects the role of increased PRR levels in enhancing the effects of angiotensin II, culminating in an overall increase in systemic blood pressure.