Journal
CURRENT DRUG TARGETS
Volume 5, Issue 2, Pages 119-136Publisher
BENTHAM SCIENCE PUBL LTD
DOI: 10.2174/1389450043490604
Keywords
influenza; pandemic; neuraminidase; nhibitors; haemagglutinin; ion channels; Relenza; Tamiflu; sialic acid
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Despite the fact that influenza is a disease which affects millions of people, sometimes with fatal consequences.. there has not, until recently, been any drug effective against all strains. Vaccines may be relatively or totally ineffective, so drugs are needed. Random screening of many thousands of compounds by pharmaceutical companies has resulted in only two compounds, amantadine and rimantidine, which target the M2 ion channel on the virus. These drugs have major disadvantages. Knowledge of the crystal structure of influenza virus neuraminidase, on the other hand, has allowed the rational design of four plug-drugs which bind to the active site of flu neuraminidase and stop replication of the virus. Two of these compounds, Relenza and Tamiflu, are now being used worldwide and, although effective when used properly, suffer from problems of delivery. They need to be given very soon after infection to be effective, they only inhibit the influenza virus and none of the other respiratory agents which cause flu-like symptoms, and they are very expensive.
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