Weight loss in patients with hematological neoplasias is associated with immune system stimulation - PubMed (original) (raw)

Weight loss in patients with hematological neoplasias is associated with immune system stimulation

H Denz et al. Clin Investig. 1993 Jan.

Abstract

Weight loss is the main symptom of so-called tumor cachexia. The pathogenetic mechanisms underlying cachexia are poorly understood; however, it appears that enhanced formation of cytokines such as interferon-gamma and tumor necrosis factor-alpha are involved. In 94 patients suffering from hematological neoplasias we compared body weight changes with serum neopterin, tryptophan, and kynurenine. Biochemical changes, the formation of neopterin, the degradation of tryptophan are closely related to interferon-gamma activity. The majority of our patients had increased neopterin and decreased tryptophan concentrations. Weight loss was seen particularly in patients with higher neopterin and lower tryptophan values. An association between higher neopterin levels and greater weight loss was apparent at study entry and during the follow-up of patients. Our data support the concept that weight loss is closely linked to endogenous interferon-gamma activity.

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