Antiviral and immunomodulatory treatment for AIDS-related primary central nervous system lymphoma: AIDS Malignancies Consortium pilot study 019.

PURPOSE

A consistent association with Epstein-Barr Virus (EBV) distinguishes acquired immunodeficiency syndrome (AIDS)-related primary central nervous system lymphoma (PCNSL) from that which occurs in the general population. Recent descriptions of long-term remissions in patients with posttransplantation EBV-associated PCNSL who received EBV-specific therapy suggest some antitumor effect is anti-EBV mediated.

PATIENTS AND METHODS

We enrolled 4 patients with AIDS-related PCNSL into a novel antiviral and immunomodulatory protocol. An additional patient was treated in a similar fashion off protocol. Treatment consisted of intravenously administered zidovudine (1.5 g twice daily), ganciclovir (5 mg/kg twice daily), and interleukin-2 (2,000,000 U twice daily). After 2 weeks of therapy, patients were switched to oral ganciclovir (1 g 3 times daily), patient-specific, highly active, antiretroviral therapy, and subcutaneous interleukin-2 (2,000,000 U 3 times weekly). A final patient was treated with intravenous zidovudine and hydroxyurea. All 6 patients had advanced-stage AIDS as reflected by a CD4+ T-lymphocyte cell count of < 50/microL and a detectable human immunodeficiency virus (HIV)-1 viral RNA load (median copies, 135,000/mL; range, 2170-360,000/mL). One of 4 protocol-enrolled patients remains in complete remission with > 4 years' follow-up.

RESULTS

Three patients died from complications of progressive PCNSL. Two patients treated off protocol exhibited favorable responses and remain in complete remission at 28 months and 52 months, respectively. Grade 3/4 myelosuppression was uniformly noted, but there were no clinically significant hemorrhagic or infectious complications.

CONCLUSION

We conclude that for patients with AIDS and PCNSL, treatments with dual efficacy against HIV and EBV merit further investigation. Our experience provides a platform for future studies.