SCH-C (SCH 351125), an orally bioavailable, small molecule antagonist of the chemokine receptor CCR5, is a potent inhibitor of HIV-1 infection in vitro and in vivo Academic Article uri icon


MeSH Major

  • Acquired Immunodeficiency Syndrome
  • Anti-HIV Agents
  • CCR5 Receptor Antagonists
  • Cyclic N-Oxides
  • HIV-1
  • Piperidines
  • Pyridines


  • We describe here the identification and properties of SCH-C (SCH 351125), a small molecule inhibitor of HIV-1 entry via the CCR5 coreceptor. SCH-C, an oxime-piperidine compound, is a specific CCR5 antagonist as determined in multiple receptor binding and signal transduction assays. This compound specifically inhibits HIV-1 infection mediated by CCR5 in U-87 astroglioma cells but has no effect on infection of CXCR4-expressing cells. SCH-C has broad and potent antiviral activity in vitro against primary HIV-1 isolates that use CCR5 as their entry coreceptor, with mean 50% inhibitory concentrations ranging between 0.4 and 9 nM. Moreover, SCH-C strongly inhibits the replication of an R5-using HIV-1 isolate in SCID-hu Thy/Liv mice. SCH-C has a favorable pharmacokinetic profile in rodents and primates with an oral bioavailability of 50-60% and a serum half-life of 5-6 h. On the basis of its novel mechanism of action, potent antiviral activity, and in vivo pharmacokinetic profile, SCH-C is a promising new candidate for therapeutic intervention of HIV infection.

publication date

  • October 23, 2001



  • Academic Article



  • eng

PubMed Central ID

  • PMC60120

Digital Object Identifier (DOI)

  • 10.1073/pnas.221375398

PubMed ID

  • 11606733

Additional Document Info

start page

  • 12718

end page

  • 23


  • 98


  • 22