title: Expression of the anti-inflammatory suppressor of cytokine signaling 3 (SOCS3) in human clear cell renal cell carcinoma.
abstract: The oncogenic transcription factor signal transducer and activator of transcription 3 (STAT3) is a cytokine-activated transcription factor controlling inflammation, cell proliferation, survival, and differentiation in normal tissue as well as in tumor growth. One of its most important negative regulators is the suppressor of cytokine signaling 3 (SOCS3). Here, we analyzed SOCS3 and other tumor-associated local immune regulators in human clear cell renal cell carcinoma (ccRCC). Analyses were performed in tumor and adjacent tumor-free healthy renal tissue from 35 patients with ccRCC. For functional analysis, ccRCC Caki-1 cell lines were stimulated with IL-6 and IFNγ in cell culture assays. We observed significantly lower SOCS3 messenger RNA (mRNA) levels in tumor tissue compared to healthy tissue. SOCS3 mRNA strongly correlated within tumor and healthy tissue. Interestingly vice versa, SOCS3 protein levels were significantly higher in tumor tissue than in healthy tissue. IL-22 and IL-22R1 mRNA displayed no differences in tumor and healthy tissue. Stimulation of Caki-1 cells with IFNγ resulted in markedly increased SOCS3 mRNA levels. We conclude that SOCS3 along with STAT3 participates in regulatory mechanisms in ccRCC, which certainly features only one of multiple factors involved but nevertheless merits further attention.
authors.affiliation: Department of Urology and Pediatric Urology, University Hospital of the Philipps-University Marburg, Baldinger Strasse, Marburg, Germany. anja.urbschat@staff.uni-marburg.de.
authors.forename: Anja
authors.initials: A
authors.lastname: Urbschat
authors.affiliation: Department of Urology and Pediatric Urology, University Hospital of the Philipps-University Marburg, Baldinger Strasse, Marburg, Germany.
authors.forename: Svenja
authors.initials: S
authors.lastname: Stumpf
authors.affiliation: Department of Urology and Pediatric Urology, University Hospital of the Philipps-University Marburg, Baldinger Strasse, Marburg, Germany.
authors.forename: Jörg
authors.initials: J
authors.lastname: Hänze
authors.affiliation: Department of Anesthesiology and Operative Intensive Care Medicine, Kepler University Hospital Linz, Linz, Austria.
authors.forename: Patrick
authors.initials: P
authors.lastname: Paulus
authors.affiliation: Department of Biomedicine, Aarhus University, Aarhus, Denmark.
authors.forename: Thorsten J
authors.initials: TJ
authors.lastname: Maier
authors.affiliation: Clinic of Urology and Andrology, Landeskrankenhaus Hall in Tirol, Hall, Austria.
authors.forename: Christine
authors.initials: C
authors.lastname: Weipert
authors.affiliation: Department of Urology and Pediatric Urology, University Hospital of the Philipps-University Marburg, Baldinger Strasse, Marburg, Germany.
authors.forename: Rainer
authors.initials: R
authors.lastname: Hofmann
authors.affiliation: Department of Urology and Pediatric Urology, University Hospital of the Philipps-University Marburg, Baldinger Strasse, Marburg, Germany.
authors.forename: Axel
authors.initials: A
authors.lastname: Hegele
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002292:Carcinoma, Renal Cell / Q000235:genetics*; D045744:Cell Line, Tumor; D005260:Female; D005786:Gene Expression Regulation / Q000235:genetics; D006801:Humans; D007249:Inflammation / Q000235:genetics; D007371:Interferon-gamma / Q000235:genetics; D015850:Interleukin-6 / Q000235:genetics; D007378:Interleukins / Q000235:genetics; D008297:Male; D008875:Middle Aged; D012333:RNA, Messenger / Q000235:genetics; D050796:STAT3 Transcription Factor / Q000235:genetics; D000071223:Suppressor of Cytokine Signaling 3 Protein / Q000235:genetics*; D000097043:Interleukin-22
chemical_list: D007371:Interferon-gamma; D015850:Interleukin-6; D007378:Interleukins; D012333:RNA, Messenger; D050796:STAT3 Transcription Factor; D000071223:Suppressor of Cytokine Signaling 3 Protein; D000097043:Interleukin-22; C106644:SOCS3 protein, human
keywords: Clear cell renal cell carcinoma; JAK2; SOCS3; STAT3