Abstract
Using immunological techniques, we have demonstrated that about half the trypsin-activatable renin in normal rat plasma is prorenin, while the other is not, and that inactive renin in nephrectomized rat plasma is not prorenin. In the present study, the trypsin-induced angiotensin I generating activity not related to prorenin from normal rat plasma disappeared after HPLC on G3000SW. HPLC analysis of trypsin-treated plasma showed the generation of active renin by trypsin for normal rat plasma, while it did not for nephrectomized rat plasma. These results indicate that trypsin treatment of crude plasma results in the generation of angiotensin I generating activity not due to prorenin, as well as activation of prorenin. HPLC on G3000SW is a useful tool for the determination of plasma prorenin.
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