REVIEWSGene Targeting Approaches to Analyzing HypertensionTAKAHASHI, NOBUYUKI; SMITHIES, OLIVER Author Information Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina. Correspondence to Dr. Nobuyuki Takahashi, 701 Brinkhous-Bullitt Building, CB #7525, Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7525. Phone: 919-966-6915; Fax: 919-966-8800; E-mail: [email protected] Received December 29, 1998. Accepted January 4, 1999. Journal of the American Society of Nephrology 10(7):p 1598-1605, July 1999. | DOI: 10.1681/ASN.V1071598 Buy Metrics Abstract Essential hypertension probably results from combinations of small genetic variations that are partly normal variations and may not be appreciably harmful individually. Strategies to identify genes contributing to hypertension are discussed in this review. Gene targeting approaches, especially gene titration, have been used in these studies of hypertension. Gene titration experiments vary the expression of a chosen gene product by generating animals having different numbers of copies of the gene coding for the product. Gene titration is powerful for analyzing quantitative variations seen in common polygenic disorders, such as kidney diseases, diabetes mellitus, and atherosclerosis, as well as hypertension, because it allows tests of causation by determining the effects on a phenotype by changes in expression of the altered gene and because it matches normal quantitative variations more closely than is possible with classic transgenic mice. The use of zero-copy (gene “knockout”) animals generated by gene disruption for studies of qualitative gene effects is also discussed. These various gene targeting experiments help identify genes regulating BP, promote a better understanding of the pathophysiology of the condition, and help identify potential targets for therapies. Copyright © 1999 The Authors. Published by Wolters Kluwer Health, Inc. All rights reserved.