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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Erythro-9-(2-hydroxy-3-nonyl)adenine as a specific inhibitor of herpes simplex virus replication in the presence and absence of adenosine analogues.

Erythro-9-(2-hydroxy-3-nonyl)adenine (EHNA; erythro-9-[3-(hydroxynonyl)]adenine), a reversible inhibitor of adenosine deaminase, significantly inhibits replication of herpes simplex virus (HSV), whereas the more active inhibitor of the deaminase, 2'-deoxycoformycin, does not. At 10 micron EHNA, which does not affect viability, growth, or DNA synthesis of uninfected HeLa cells, production of HSV and HSV-specific DNA is inhibited 75-90% and 60%, respectively. HSV multiplies normally in cells pretreated with EHNA and washed to remove this inhibitor. EHNA (10 micron) also markedly potentiates the toxicity of adenine arabinonucleoside and of cordycepin (3'-deoxyadenosine) against HeLa cells and against the production of HSV in those cells. Cordycepin alone (10 micron) does not inhibit HSV replication whereas in combination with 10 micron EHNA there is a greater than 99% inhibition of virus production. Under these conditions, RNA synthesis is inhibited by more than 80% whereas protein and DNA synthesis are inhibited to a lesser extent; in this system, virtually all of the DNA synthesis in infected cells is that of host DNA. Thus, EHNA appears to affect the synthesis of HSV DNA specifically in two different ways, depending on whether it is used alone or in the presence of cordycepin.[1]


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