Abstract: The binding mode of the antiviral compounds have been characterized through a variety of biophysical and structural studies, elaborating on the proposed aggregation mechanism of action. We demonstrate the direct binding of these antiviral compounds to NP using thermal shift enhancement assay (TSE) and NMR. In addition, we have completed a detailed analysis of the oligomerization mechanism of action using dynamic light scattering, analytical ultracentrifugation, and surface plasmon resonance (SPR). Structure determination using x-ray crystallography confirmed the proposed compound-induced oligomerization mechanism of action. The co-crystal structure revealed that two compounds bound in an anti-parallel fashion bridging two NP monomers, inducing a novel non-native NP oligomer.

Abstract: A compound of Formula I is set forth, including pharmaceutically acceptable salts thereof: wherein Het is a 5 or 6-membered heterocycle with —N, —O, or —S adjacent to the —Ar substituent or adjacent to the point of attachment for the —Ar substituent; Ar is aryl or heteroaryl; R is —CH3, —CH2F, or —CH?CH2; W is —NO2, —Cl, —Br, —CHO, —CH?CH2, or —CN; X is —Cl, —CH3, or —CN; Y is —CH or —N; and Z is C1-C6 alkyl, C3-C6 cycloalkyl, substituted aryl, substituted heteroaryl, OR1, or NHR1, wherein R1 is selected from the group of H, aryl, heteroaryl, C1-C6 alkyl and C3-C6 cycloalkyl. This compound is useful in compositions for the prevention and treatment of influenza virus.

Abstract: A compound of Formula I is set forth, including pharmaceutically acceptable salts thereof: wherein Het is a 5 or 6-membered heterocycle with —N, —O, or —S adjacent to the —Ar substituent or adjacent to the point of attachment for the —Ar substituent; Ar is aryl or heteroaryl; R is —CH3, —CH2F, —CHF2 or —CH?CH2; V is —H, —CH3 or ?O; W is —NO2, —Cl, —Br, —CH2OH, or —CN; X is —Cl, —Br, —F, —CH3, —OCH3, or —CN; Y is —CH or —N; and Z is —CH or —N. This compound is useful in compositions for the prevention and treatment of influenza virus.

Abstract: A compound of Formula I is set forth, including pharmaceutically acceptable salts thereof: wherein Het is a 5 or 6-membered heterocycle with —N, —O, or —S adjacent to the —Ar substituent or adjacent to the point of attachment for the —Ar substituent; Ar is aryl or heteroaryl; R is —CH3, —CH2F, or —CH?CH2; W is —NO2, —Cl, —Br, —CHO, —CH?CH2, or —CN; X is —Cl, —CH3, or —CN; Y is —CH or —N; and Z is C1-C6 alkyl, C3-C6 cycloalkyl, substituted aryl, substituted heteroaryl, OR1, or NHR1, wherein R1 is selected from the group of H, aryl, heteroaryl, C1-C6 alkyl and C3-C6 cycloalkyl. This compound is useful in compositions for the prevention and treatment of influenza virus.

Abstract: Novel capped oligonucleotides useful in treatment of influenza infection. A synthetically derived 67-nucleotide RNA substrate, containing a ?.sup.32 P! labeled cap-1 structure was used to analyze parameters of influenza virus endonuclease activity. This substrate was specifically cleaved by the influenza virus polymerase to yield a single capped 11-nucleotide fragment capable of directly priming transcription. An analysis of systematic truncations of this RNA substrate in cleavage, elongation, and binding reactions demonstrated that the minimum chain length required for cleavage was one nucleotide past the cleavage site. In contrast, the minimum chain length required for priming activity was found to be 9 nucleotides, while a chain length of at least 4 nucleotides was required for efficient binding.