The main characteristics of each study with the proteins affected in patients in PTL compared to normal individual.

Index:(S)PTB = (Spontaneous) Preterm birth.1D-GE = 1D gel electrophoresis.2D-CF = 2D chromatographic fractionation.2D-LC = 2D liquid chromatography.2D-DIGE = Fluorescence two-dimensional differential gel electrophoresis.2D-GE/2DE = 2D (gel) electrophoresis.AF = Amniotic fluid.AFC = Amniotic fluid culture.AMBP = Alpha-1-microglobulin/bikunin precursor.APO = Apolipoprotein.CF = Cervical fluid.cLC = Capillary liquid chromatography.CVF = Cervical-vaginal fluid.DSCR2 = Down syndrome critical region protein 2.ELISAs = Enzyme-linked immunosorbent assays.EOI-TOFMS = Electrospray-ionization, time-of-flight mass spectrometry.ESI-IT MS = Electrospray ionization-ion trap mass spectrometry.FPLC = Fast protein liquid chromatography.HNP = Human neutrophil protein.HP8 = Human peptide 8.HPLC = High performance liquid chromatography.IAI = Intra-amniotic infection/inflammation.IGFBP-1 = Insulin-like growth factor binding protein-1.IL = Interleukin.ITIH4 = Inter-alpha-trypsin inhibitor heavy chain 4.iTRAQ = Isobaric tag for relative and absolute quantitation.LC-MS/MS = Liquid chromatography – tandem mass spectrometry.LTBP1 = Latent-transforming growth factor β-binding protein isoform 1L.LTF = Growth-inhibiting protein 12/Lactoferrin.MALDI-TOF = Matrix-assisted laser desorption time-of-flight.MHC = Major histocompatibility complex.MRM = Multiple reaction monitoring.MS = Mass spectrometry.N/A = Not Applicable.N = Number of participants.OGN = Mimecan precursor.PANTHER = Protein analysis through evolutionary relationships.PPROM = preterm premature/(pre-labour) rupture of membranes.PT = Placental tissue.PTB = Preterm birth.PTL = Preterm labour.RBC = Red blood cell.RETN = Resistin.RP-HPLC = Reversed-phase high performance liquid chromatography.SCX chromatography column = Strong cation exchange column.SD = Standard deviation.SDS-PAGE = Sodium dodecyl sulfate-polyacrylamide gel electrophoresis.SELDI TOF = Surface-enhanced laser desorption ionization time-of-flight.SILAP = Stable isotope labeled proteome.SLPI = Antileukoproteinase.SRY = Sex determining region Y.TMSL3 = Thymosin-like 3.TPMsk1 = Tropomyosin sk1 fragment.WB = Western nlotting.WBC = White blood cells.