Regulatable atrial natriuretic peptide gene therapy for hypertension
- Kurt J. Schillinger*,
- Sophia Y. Tsai*,
- George E. Taffet†,
- Anilkumar K. Reddy†,
- Ali J. Marian†,
- Mark L. Entman†,
- Kazuhiro Oka*,
- Lawrence Chan*, and
- Bert W. O'Malley*,‡
- Departments of *Molecular and Cellular Biology and †Medicine, Sections of Cardiovascular Sciences and Cardiology and DeBakey Heart Center, Baylor College of Medicine, 1 Baylor Plaza, Houston, TX 77030
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Contributed by Bert W. O'Malley, August 10, 2005
Abstract
Hypertension (HTN) is a disease that begins with dysfunctional renal-sodium excretion and progresses to a syndrome of highly elevated systolic, diastolic, and mean arterial pressures. Inadequacies in the therapy of HTN have led to the investigation of the gene therapy of this disease by using systemic overproduction of vasodilatory peptides, such as atrial natriuretic peptide (ANP). However, gene-therapy approaches to HTN using ANP are limited by the need for long-term ANP gene expression and, most important, control of ANP gene expression. Here, we introduce a helper-dependent adenoviral vector carrying the mifepristone (Mfp)-inducible gene-regulatory system to control in vivo ANP expression. In the BPH/2 mouse model of HTN, Mfp-inducible ANP expression was seen for a period of >120 days after administration of vector. Physiological effects of ANP, including decreased systolic blood pressure, increased urinary cGMP output, and decreases in heart weight as a percentage of body weight were also under the control of Mfp. Given these capabilities, this vector represents a paradigm for the gene therapy of HTN.
Footnotes
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↵ ‡ To whom correspondence should be addressed. E-mail: berto{at}bcm.tmc.edu.
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Author contributions: K.J.S., S.Y.T., and B.W.O. designed research; K.J.S. performed research; K.J.S., G.E.T., A.K.R., A.J.M., M.L.E., K.O., and L.C. contributed new reagents/analytic tools; K.J.S., S.Y.T., G.E.T., A.K.R., A.J.M., M.L.E., and B.W.O. analyzed data; and K.J.S. wrote the paper.
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Abbreviations: HTN, hypertension; ANP, atrial natriuretic peptide; Mfp, mifepristone; MIGRS, Mfp-inducible gene-regulatory system; HD-Ad, helper-dependent adenoviral; HW/BW, heart weight as a percentage of body weight.
- Copyright © 2005, The National Academy of Sciences
