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Treatment of AIDS-associated progressive multifocal leukoencephalopathy with highly active antiretroviral therapy.
AIDS 1998 December 25
OBJECTIVES: To evaluate the efficacy of highly active antiretroviral therapy (HAART) in 12 patients with AIDS-associated progressive multifocal leukoencephalopathy (PML).
PATIENTS AND METHODS: The diagnosis of PML was established by brain biopsy in six patients and by neuroimaging findings and PCR detection of JC virus in cerebrospinal fluid (CSF) in six patients. We also studied 13 consecutive AIDS patients with biopsy-proven PML cared for in the same institution before HAART was available. Eleven patients of the HAART group and eight patients of the control group received intravenous arabinoside cytosine cycles.
RESULTS: With HAART, the median decrease in the HIV viral load was 3.58 log10 copies/ml and the median increase in the CD4 cell count was 74x10(6)/l. The median survival time after PML diagnosis was 545 days in the HAART group and 60 days in the control group (P<0.001, log-rank test). In the HAART group, the neurological deficits improved substantially in six patients and stabilized in six patients. Eleven patients underwent follow-up cranial computed tomography or magnetic resonance scan that showed improvement of PML lesions in 10 patients and stabilization in one patient. Follow-up CSF analysis showed clearance of JC virus in six out of seven patients who had an initial positive result.
CONCLUSIONS: This study shows that HAART may increase the survival, clinical status and radiological features of AIDS patients with PML. Clearance of JC virus from CSF has been found, suggesting that immune reconstitution can interrupt the JC virus lytic cycle.
PATIENTS AND METHODS: The diagnosis of PML was established by brain biopsy in six patients and by neuroimaging findings and PCR detection of JC virus in cerebrospinal fluid (CSF) in six patients. We also studied 13 consecutive AIDS patients with biopsy-proven PML cared for in the same institution before HAART was available. Eleven patients of the HAART group and eight patients of the control group received intravenous arabinoside cytosine cycles.
RESULTS: With HAART, the median decrease in the HIV viral load was 3.58 log10 copies/ml and the median increase in the CD4 cell count was 74x10(6)/l. The median survival time after PML diagnosis was 545 days in the HAART group and 60 days in the control group (P<0.001, log-rank test). In the HAART group, the neurological deficits improved substantially in six patients and stabilized in six patients. Eleven patients underwent follow-up cranial computed tomography or magnetic resonance scan that showed improvement of PML lesions in 10 patients and stabilization in one patient. Follow-up CSF analysis showed clearance of JC virus in six out of seven patients who had an initial positive result.
CONCLUSIONS: This study shows that HAART may increase the survival, clinical status and radiological features of AIDS patients with PML. Clearance of JC virus from CSF has been found, suggesting that immune reconstitution can interrupt the JC virus lytic cycle.
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