Competition
The protein gp120 is necessary during the initial binding of HIV to its target cell. Consequently, anything which binds to gp120 or its targets can block gp120 from binding to a cell by being physically in the way. Only one such agent, Maraviroc, which binds the co-receptor CCR5 is currently licensed and in clinical use. No agent targeting gp120's main first cellular interaction partner, CD4, is currently licensed since interfering with such a central molecule of the immune system can cause toxic side effects, such as the anti-CD4 monoclonal antibody OKT4. Targeting gp120 itself has proven extremely difficult due to its high degree of variability and shielding.
Read more about this topic: Envelope Glycoprotein GP120
Famous quotes containing the word competition:
“The praise of ancient authors proceeds not from the reverence of the dead, but from the competition and mutual envy of the living.”
—Thomas Hobbes (1588–1679)
“All adults who care about a baby will naturally be in competition for that baby.... Each adult wishes that he or she could do each job a bit more skillfully for the infant or small child than the other.”
—T. Berry Brazelton (20th century)
“Like many businessmen of genius he learned that free competition was wasteful, monopoly efficient. And so he simply set about achieving that efficient monopoly.”
—Mario Puzo (b. 1920)