AIDS OPPORTUNISTIC INFECTIONS DRUG DESIGN

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Pneumocystis carinii pneumonia (PCP) is the leading killer of patients with AIDS. Similarly, Toxomplasma gondii, a pervasive parasitic protozoan, causes significant morbidity and mortality among AIDS patients. Current treatment regimens for both P. carinii and T. gondii infections often produce severe side effects, leading to the cessation of therapy. It is widely recognized that new drugs having novel mechanisms of action are urgently needed for the treatment of PCP and toxoplasmosis. Building upon prior medicinal chemistry research, we have initiated two structure-based drug design programs to make improved inhibitors of T. gondii hypoxanthine-guanine phosphoribosyltransferase (HGPRT), T. gondii dihydrofolate reductase-thymidylate synthase (DHFR-TS) and P. carinii DHFR.