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STUDIES ON EXPERIMENTAL HYPERTENSION : XX. THE BIOASSAY OF RENIN.
H Goldblatt1, Y J Katz, H A Lewis
1Institute of Pathology, Western Reserve University, Cleveland.
The Journal of Experimental Medicine
|October 30, 2009
Summary
A new bioassay method for renin provides reliable results using a standardized dog unit. This method simplifies potency and purity determination, making it unnecessary to adjust for dog body weight.
Area of Science:
- Biochemistry
- Physiology
- Pharmacology
Background:
- Renin is a crucial enzyme in the renin-angiotensin system, regulating blood pressure.
- Accurate bioassays for renin are essential for research and clinical applications.
- Existing methods may lack standardization or consistency.
Purpose of the Study:
- To present a simple, rapid, and reliable bioassay method for renin.
- To establish a standardized "dog unit" for renin potency.
- To provide a method for expressing renin yield and purity.
Main Methods:
- Developed a bioassay using unanesthetized dogs (10-25 kg).
- Defined a "dog unit" as the amount of renin raising blood pressure by 30-35 mm Hg within 3 minutes.
- Measured renin potency in dog units per cubic centimeter and per gram of renal tissue.
- Assessed purity as dog units per milligram of nitrogen.
Main Results:
- The method yields reliable and consistent results.
- Dog body weight (10-25 kg) does not affect renin response, simplifying calculations.
- Established clear metrics for renin yield and purity.
- Demonstrated the utility of the dog unit for standardization.
Conclusions:
- The presented bioassay method is simple, rapid, and reliable.
- The established dog unit provides a standardized measure for renin.
- The method allows for accurate estimation of renin yield and purity.
- This standardized bioassay is proposed for widespread adoption.
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