Proteinase inhibitors from Streptomyces with antiviral activity

✍ Scribed by Julia Serkedjieva; Lidiya Angelova; Mimi Remichkova; Iskra Ivanova

• Book ID: 102390719
• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 94 KB
• Volume: 46
• Category: Article
• ISSN: 0233-111X
• DOI: 10.1002/jobm.200510127

✦ Synopsis

Abstract

An extensive screening study for the production of proteolytic inhibitors has been carried out on 75 Streptomyces strains. It was found that 18 of the strains and/or their variants (24%) produced proteinaceous substances, which belonged to the group of typical serine protease inhibitors. 23 samples were tested for inhibitory activity on the replication of influenza virus A/Germany/34, strain Rostock (H7N1) (A/Rostock) in chicken embryonic fibroblast (CEF) cells. Eleven of the tested samples (52.2%) significantly inhibited viral growth. Further the specific inhibitory effect on the replication of influenza virus A/Aichi/2/68 (H3N2) (A/Aichi) in Madin‐Darby canine kidney (MDCK) cells and on the growth of herpes simplex virus type 1, strain DA (HSV‐1) in Madin‐Darby bovine kidney (MDBK) cells was tested. Nine samples significantly inhibited A/Aichi and four – HSV‐1. The most effective inhibitors, produced by Streptomyces sp. 225b (SS 225b) and Streptomyces chromofuscus 34‐1 (SS 34‐1) protected mice from mortality in the experimental influenza A/Aichi virus infection. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)