Erythropoietin gone expression is suppressed after lipopolysaccharide or interleukin-1β injections in rats

Stilla Frede, Joachim Fandrey, Horst Pagel, Thomas Hellwig, Wolfgang Jelkmann*

*Corresponding author for this work
98 Citations (Scopus)


Proinflammatory cytokines play an important role in the pathogenesis of anemia in inflammatory diseases. Interleukin-1 (IL-1) and tumor necrosis factor-α (TNF-α) have been reported to inhibit the synthesis of erythropoietin (EPO) in vitro. To evaluate the in vive significance of this observation, we have investigated effects of the administration of bacterial lipopolysaccharide (LPS) and IL-1β on renal EPO production in rats. Measurements by competitive reverse-transcription polymerase chain reaction showed that EPO mRNA levels were significantly reduced in the kidneys of normoxic rats 6 h after the injection of LPS (0.1 or 1 mg/kg). In addition, LPS and IL-1β (1 μg/kg) inhibited the increase in EPO mRNA and plasma EPO levels when administered to rats before hypoxia exposure (8% O2 in the inspiratory gas). Evidence for an inflammatory reaction in the kidneys of LPS-treated rats was provided by measurements of greatly elevated renal TNF- α mRNA levels. Furthermore, kidneys isolated from LPS-treated rats produced less immunoreactive EPO when perfused hypoxically in vitro for 2 h. Thus mediators of the immune response inhibit renal EPO gene expression in vivo, which is relevant with respect to the impaired synthesis of EPO in inflammatory diseases in humans.

Original languageEnglish
JournalAmerican Journal of Physiology - Regulatory Integrative and Comparative Physiology
Issue number3 42-3
Pages (from-to)R1067-R1071
Publication statusPublished - 1997

Research Areas and Centers

  • Academic Focus: Center for Brain, Behavior and Metabolism (CBBM)


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