title: Suppressor of cytokine signaling (SOCS) 1 is down-regulated in renal transplant recipients with rejection.
abstract: The role of suppressor of cytokine signaling (SOCS) in maintaining the immunotolerance of renal allograft is unknown. To clarify this, peripheral blood mononuclear cells (PBMCs) from renal transplant patients with or without rejection were analyzed for the expression of SOCS family proteins by cell culture, immunoblot, flowcytometry and quantitative reverse transcription-polymerase chain reaction (qPCR). Patients with renal graft rejection expressed lower levels of SOCS1 while those without rejection showed a higher SOCS1 expression in the PBMC either on stimulation or not. In addition, SOCS1 was constitutively expressed in normal individuals as well as renal transplant patients with graft tolerance while patients with rejection exhibited down-regulation of the SOCS1 but not SOCS3. The qPCR tests and flowcytometric measurements have also showed that the reduction of SOCS1 expression in rejection could be quantitatively evaluated. These results have suggested that down-regulation of SOCS1 may be regarded as a biomarker for early detection of renal allograft rejection.
authors.affiliation: Division of Nephrology, Taipei Veterans General Hospital, Taiwan; Faculty of Medicine, National Yang-Ming University, Taipei, Taiwan.
authors.forename: Tsai-Hung
authors.initials: TH
authors.lastname: Wu
authors.affiliation: Division of Allergy, Immunology and Rheumatology, Mackay Memorial Hospital, Taiwan.
authors.forename: Hui-Ting
authors.initials: HT
authors.lastname: Lee
authors.affiliation: Division of Allergy, Immunology & Rheumatology, Department of Medicine, Taipei Veterans General Hospital, Taiwan; Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan.
authors.forename: Chien-Chih
authors.initials: CC
authors.lastname: Lai
authors.affiliation: Department of Pathology & Laboratory Medicine, Taipei Veterans General Hospital, Taiwan.
authors.forename: An-Hang
authors.initials: AH
authors.lastname: Yang
authors.affiliation: Division of Transplantation Surgery, Department of Surgery, Taipei Veterans General Hospital, Taiwan.
authors.forename: Che-Chuan
authors.initials: CC
authors.lastname: Loong
authors.affiliation: Department of Radiology, Taipei Veterans General Hospital, Taiwan.
authors.forename: Hsin-Kai
authors.initials: HK
authors.lastname: Wang
authors.affiliation: Division of Rheumatology, National Taiwan University Hospital, Taiwan.
authors.forename: Chia-Li
authors.initials: CL
authors.lastname: Yu
authors.affiliation: Division of Allergy, Immunology & Rheumatology, Department of Medicine, Taipei Veterans General Hospital, Taiwan; Faculty of Medicine, National Yang-Ming University, Taipei, Taiwan. Electronic address: cytsai@vghtpe.gov.tw.
authors.forename: Chang-Youh
authors.initials: CY
authors.lastname: Tsai
mesh_terms: D000328:Adult; D000368:Aged; D015415:Biomarkers / Q000378:metabolism*; D002478:Cells, Cultured; D015536:Down-Regulation; D005260:Female; D006084:Graft Rejection / Q000175:diagnosis / Q000276:immunology*; D006801:Humans; D007108:Immune Tolerance; D016030:Kidney Transplantation; D007963:Leukocytes, Mononuclear / Q000276:immunology*; D008297:Male; D008875:Middle Aged; D000071222:Suppressor of Cytokine Signaling 1 Protein / Q000235:genetics / Q000378:metabolism*; D055815:Young Adult
chemical_list: D015415:Biomarkers; C108944:SOCS1 protein, human; D000071222:Suppressor of Cytokine Signaling 1 Protein
keywords: Allograft kidney; Antibody-mediated rejection; Pro-inflammatory cytokines; Suppressor of cytokine signaling (SOCS)