This article appears in the following NDT Plus issue: Key Insights into Present and Future Treatments of Anaemia in CKD Patients [View the issue table of contents]
Inflammation and its impact on anaemia in chronic kidney disease: from haemoglobin variability to hyporesponsiveness
1 Servicio de Nefrología, Hospital Universitario Valdecilla, Santander, Spain
2 Njurmediciniska klin. Karolinska Solna, Sweden
3 Institut Cochin, Université Paris Descartes, CNRS (UMR 8104)
4 Inserm, U567, Paris, France
Correspondence: Angel L. M. de Francisco, Presidente de la Sociedad Española de Nefrología, Servicio de Nefrología, Hospital Universitario Valdecilla, Santander, Spain. Tel: +34-942-202738; Fax: +34-942-320415; E-mail: martinal{at}unican.es
| Abstract |
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The availability of erythropoiesis-stimulating agents (ESAs) has revolutionized the treatment of anaemia in patients with chronic kidney disease. However, maintaining patients at haemoglobin (Hb) levels that are both safe and provide maximal benefit is a continuing challenge in the field. Based on emerging data on the potential risks of Hb treatment targets >13 g/dL, treatment targets have recently been lowered. In the latest revision (March 2008) of the European product labelling for the ESA class of drugs, the target treatment range was lowered to 10–12 g/dL. Fluctuation of Hb levels or Hb variability during treatment with ESAs is a well-documented phenomenon. Hb levels that are either too high or too low may have an adverse effect on patient outcomes; thus, it is important to understand the causes of Hb variability in order to achieve optimal treatment. Several factors are believed to contribute to variation in the Hb level, including patient comorbidities and intercurrent events. Inflammation is also an important factor associated with Hb variability, and the consequences of persistent inflammatory activity are far-reaching in affected patients. This review addresses the complex role of inflammation in chronic kidney disease, as evidenced by the apparent state of deranged inflammatory markers. The mechanisms by which inflammatory cytokines may affect the response to ESAs, the development of anaemia and poor treatment outcomes are also examined. In addition, various options for intervention to enhance the response to ESAs in haemodialysis patients with inflammation are considered.
Key Words: anaemia management chronic kidney disease epoetin hyporesponsiveness haemoglobin variability inflammation
Received for publication September 19, 2008. Accepted for publication October 21, 2008.