Volume 274, June 1998 Volume 43, June 1998 

Pages H1885-H1894: R. H. Adamson, B. Liu, G. Nilson Fry, L. L. Rubin, and F. E. Curry. "Microvascular permeability and number of tight junctions are modulated by cAMP." On page H1891, right column, sixth line down, the phrase "we found" was inadvertently introduced, and the complete sentence should read as the following: "Similarly, using human umbilical artery endothelial cells, Langeler and van Hinsbergh (21) found that forskolin (25 µM) alone induced an immeasurable change in cAMP, 3-isobutyl-1-methylxanthine (1 µM, a nonselective PDE inhibitor) alone approximately doubled the cAMP content, and combined treatment with both drugs produced an 8- to 10-fold increase in cAMP content within 5 min." We regret this error.