In the article by Chen et al in the February 2006 issue of Hypertension (Chen Y, Chen H, Hoffmann A, Cool DR, Diz DI, Chappell MC, Chen A, Morris M. Adenovirus-mediated small-interference RNA for in vivo silencing of angiotensin AT1a receptors in mouse brain. Hypertension 2006;47:230–237) the following errors occur. In the author list, Dr Chen’s name should appear as Alex F. Chen. In the Experimental Protocols section, the virus concentration for Ad-LacZ virus should be 1.9×1012 pfu/mL, and the virus concentration for Ad-AT1a-siRNA virus should be 2.3×1010 pfu/mL. In Table 2, the last entry under the Light column of Day 0 should be 567±20. The authors regret the errors.