The maximal tolerable intravenous dosage of pentoxifylline in AIDS patients does not inhibit lipopolysaccharide-stimulated tumor necrosis factor alpha production.

Abstract:

:Tumor necrosis factor alpha (TNF-alpha) may be involved in the pathogenesis of metabolic and endocrine changes in HIV infection. Pentoxifylline (PTX) is able to suppress the production of TNF-alpha in vitro. The effect of two dosages of intravenously administered PTX on clinical symptoms and ex vivo LPS-stimulated TNF-alpha production was evaluated in six clinically stable AIDS patients in a saline-controlled study. PTX in a dosage of 1.5 mg/min was tolerated without side effects. PTX in a dosage of 2.1 mg/min resulted in intolerable nausea and necessitated termination of infusion after 30 min. The average plasma concentration of PTX after infusion of 1.5 mg/min for 6 hr was 510+/-56 ng/ml, which is considerably below the concentrations that have been reported to suppress TNF-alpha production in vitro. No effect of PTX infusion (1.5 mg/min) on LPS-stimulated TNF production ex vivo was found. Our conclusion is that the maximally tolerated i.v. dosage of PTX in AIDS patients is 1.5 mg/min. LPS-stimulated ex vivo TNF-alpha production, at the LPS concentrations tested, was not inhibited by the plasma concentration of PTX that could be achieved at this dosage.

authors

Heijligenberg R,Romijn JA,Ackermans M,Endert E,Timmer JG,Sauerwein HP

doi

10.1089/aid.1998.14.299

subject

Has Abstract

pub_date

1998-03-01 00:00:00

pages

299-303

issue

4

eissn

0889-2229

issn

1931-8405

journal_volume

14

pub_type

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