Research Article

The Novel Diagnostic Biomarkers for Focal Segmental Glomerulosclerosis

Table 2

Putative specific biomarkers for FSGS.

Protein IDProtein nameBiological processCellular compartmentMolecular functionFold change (FSGS/normal)Up/downregulation

CD59CD59 glycoproteinBlood coagulation/cell surface receptor signaling pathway/negative regulation of apoptotic processAnchored to external side of plasma membranePotent inhibitor of the complement membrane attack complex (MAC) action24.41

CD44CD44 antigenWound healing involved in inflammatory response/negative regulation of apoptotic processExternal side of plasma membraneBlood group antigen receptor22.95

IBP7Insulin-like growth factor-binding protein 7Negative regulation of cell proliferation/regulation of cell growthExtracellular spaceInsulin-like growth factor-binding13.06

UROMUromodulinNegative regulation of cell proliferation/regulation of ion homeostasisApical plasma membrane/extracellular spaceCalcium ion binding12.63

GRNGranulinSignal transduction/positive regulation of epithelial cell proliferationExtracellular spaceGrowth factor activity11.08

SAPProactivator polypeptideRegulation of lipid metabolic process/regulation of MAPK cascadeExtracellular space/lysosomal membraneEnzyme activator activity/lipid binding9.73

TRFESerotransferrinTransferrin transport/cellular iron ion homeostasisApical plasma membrane/basal plasma membrane/extracellular regionFerric iron binding15.15

A1ATAlpha-1-antitrypsinRegulation of proteolysis/response to cytokine stimulus/blood coagulationExtracellular spaceSerine-type endopeptidase inhibitor activity11.52

ApoA-1Apolipoprotein A-INegative regulation of cytokine secretion involved in immune response/negative regulation of inflammatory responseSpherical high-density lipoprotein particle/secretory granuleHigh-density lipoprotein particle binding5.64

ANT3Antithrombin-IIIBlood coagulation/negative regulation of inflammatory response/response to nutrient/regulation of proteolysisExtracellular space/plasma membraneSerine-type endopeptidase inhibitor activity5.18

A1AG1Alpha-1-acid glycoprotein 1Regulation of immune system process/acute-phase responseExtracellular spaceFunctioning as transport protein in the blood stream3.85

Robo4Roundabout homolog 4Cell differentiation/negative regulation of cell migrationExternal side of plasma membraneReceptor activity3.09

DPEP1*Dipeptidase 1Leukotriene metabolic process/negative regulation of apoptotic processExtracellular space/anchored to membraneMetallodipeptidase activityā€”ā€”

DPEP1: this protein is a qualitative biomarker. All healthy subjects had this protein while it was not detected in FSGS samples at all.