open access

Vol 49, No 4 (2011)
Original paper
Submitted: 2012-01-16
Published online: 2012-01-16
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SOCS3 and SOCS5 mRNA expressions may predict initial steroid response in nephrotic syndrome children

Danuta Ostalska-Nowicka, Magdalena Smiech, Malgorzata Jaroniec, Katarzyna Zaorska, Piotr Zawierucha, Witold Szaflarski, Agnieszka Malinska, Michal Nowicki
DOI: 10.5603/FHC.2011.0096
·
Folia Histochem Cytobiol 2011;49(4):719-728.

open access

Vol 49, No 4 (2011)
ORIGINAL PAPERS
Submitted: 2012-01-16
Published online: 2012-01-16

Abstract

Suppressors of Cytokine Signaling (SOCS) inhibit Signal Transducers and Activators of Transcription (STATs) phosphorylation by binding and inhibiting Janus Kinases (JaKs). The aim of the present study was to evaluate the influence of glucocorticosteroids on the JaK/STAT signaling pathway in the leukocytes of nephrotic syndrome (NS) patients. The study group was composed of 34 steroid sensitive NS (SSNS) children and 20 steroid resistant NS (SRNS) subjects. Gene expression was assessed by real-time PCR using pre-designed human JaK/STAT PCR array. Protein expression was evaluated using ELISA assay (plasma concentration) and immunofluorescence (in situ protein expression). In SSNS children, the initial increased expression of JaK1, JaK2, JaK3, STAT1, STAT2, STAT6, TYK2, SOCS1, SOCS2, SOCS3, SOCS4 and SOCS5 was reduced back to the control limits. Similarly, in SRNS patients the increased levels of almost all mRNA expressions for the abovementioned genes were decreased, with the exceptions of SOCS3 and SOCS5 expressions. These mRNA expressions were still significantly increased and correlated with early unfavorable course of nephrotic syndrome in children. Plasma levels of SOCS3, SOCS5, IL-6 and IL-20 were significantly increased in SRNS subjects after six weeks of steroids medication compared to SSNS and control participants. We conclude that SOCS3 and SOCS5 increased mRNA expressions might predict initial resistance to steroids in NS patients. (Folia Histochemica et Cytobiologica 2011; Vol. 49, No. 4, pp. 719–728)

Abstract

Suppressors of Cytokine Signaling (SOCS) inhibit Signal Transducers and Activators of Transcription (STATs) phosphorylation by binding and inhibiting Janus Kinases (JaKs). The aim of the present study was to evaluate the influence of glucocorticosteroids on the JaK/STAT signaling pathway in the leukocytes of nephrotic syndrome (NS) patients. The study group was composed of 34 steroid sensitive NS (SSNS) children and 20 steroid resistant NS (SRNS) subjects. Gene expression was assessed by real-time PCR using pre-designed human JaK/STAT PCR array. Protein expression was evaluated using ELISA assay (plasma concentration) and immunofluorescence (in situ protein expression). In SSNS children, the initial increased expression of JaK1, JaK2, JaK3, STAT1, STAT2, STAT6, TYK2, SOCS1, SOCS2, SOCS3, SOCS4 and SOCS5 was reduced back to the control limits. Similarly, in SRNS patients the increased levels of almost all mRNA expressions for the abovementioned genes were decreased, with the exceptions of SOCS3 and SOCS5 expressions. These mRNA expressions were still significantly increased and correlated with early unfavorable course of nephrotic syndrome in children. Plasma levels of SOCS3, SOCS5, IL-6 and IL-20 were significantly increased in SRNS subjects after six weeks of steroids medication compared to SSNS and control participants. We conclude that SOCS3 and SOCS5 increased mRNA expressions might predict initial resistance to steroids in NS patients. (Folia Histochemica et Cytobiologica 2011; Vol. 49, No. 4, pp. 719–728)
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Keywords

JaK/STAT signaling pathway; leukocytes; nephrotic syndrome; resistance to steroids; children

About this article
Title

SOCS3 and SOCS5 mRNA expressions may predict initial steroid response in nephrotic syndrome children

Journal

Folia Histochemica et Cytobiologica

Issue

Vol 49, No 4 (2011)

Article type

Original paper

Pages

719-728

Published online

2012-01-16

DOI

10.5603/FHC.2011.0096

Bibliographic record

Folia Histochem Cytobiol 2011;49(4):719-728.

Keywords

JaK/STAT signaling pathway
leukocytes
nephrotic syndrome
resistance to steroids
children

Authors

Danuta Ostalska-Nowicka
Magdalena Smiech
Malgorzata Jaroniec
Katarzyna Zaorska
Piotr Zawierucha
Witold Szaflarski
Agnieszka Malinska
Michal Nowicki

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