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Review
. 2005 May;20(5):567-75.
doi: 10.1007/s00467-004-1766-8. Epub 2005 Feb 19.

Suppressors of cytokine signaling in health and disease

Jane C Tan  1 , Ralph Rabkin
Affiliations
Review

Suppressors of cytokine signaling in health and disease

Jane C Tan et al. Pediatr Nephrol. 2005 May.

Abstract

Cytokines consist of a large family of secreted proteins, including pro-inflammatory agents, growth hormone and erythropoietin, that utilize the Janus kinase (JAK) signal transducer and activator of transcription (STAT) signal transduction pathway to mediate many of their key physiologic and pathologic actions. These actions include cytokine-mediated inflammation, immunoregulation, hematopoiesis and growth. The JAK-STAT pathway is regulated by several processes, among which negative feedback regulation by the suppressors of cytokine signaling (SOCS), members of a family of eight proteins, is particularly important. Each cytokine induces one or more specific SOCS proteins that in turn down-regulate the signal initiated by the cytokine. Through their impact on the cytokine-activated JAK-STAT pathway, the SOCS proteins are involved in many diseases that come to the attention of the pediatric nephrologist. For example, an increase in the expression of SOCS-2 and -3 may be a cause of growth hormone resistance and thus may contribute to the growth retardation that affects children with chronic renal failure. Because of their obvious biologic importance, the SOCS proteins have been the subject of intense research that includes the development of strategies to utilize these proteins to control cytokine-induced JAK/STAT signal transduction for therapeutic purposes.

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