Here we describe a novel function for members of the well-characterized hum
an natriuretic peptide family. Human "brain-type natriuretic peptide" (hBNP
-32) as well as other members of this peptide class are antimicrobially act
ive against Gram-positive and Gram-negative bacteria and yeast in a dose-de
pendent manner. This activity of natriuretic-peptides is comparable to that
of known antimicrobial peptides such as casocidins or magainins.