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The acquired immunodeficiency syndrome (AIDS) is accompanied by a metabolic disturbance. Serum samples from persons with antibodies against the AIDS associated human immunodeficiency virus (HIV/LAV/HTLV III) including persons without overt symptoms, patients with lymphadenopathy syndrome (LAS) and patients with AIDS or AIDS-related complex (ARC) contain on the average significantly elevated concentrations of arginine and glutamate. The serum from patients with overt AIDS contains also, on the average, significantly reduced concentrations of methionine and cystine. In vitro experiments revealed that the [3H]thymidine incorporation by mitogenically stimulated murine lymphocytes and cloned T cells is inhibited by an elevation of the extracellular glutamate concentration and augmented by the addition of cysteine. This suggests the possibility that the abnormal concentrations of glutamate and cystine in the blood of HIV-infected persons may contribute to the defect in the lymphoid system.

Abnormal Amino-Acid Concentrations in the Blood of Patients with Acquired Immunodeficiency Syndrome (AIDS) May Contribute to the Immunological Defect