title: Analysis of serum protein fractions from women with recurrent miscarriage.
abstract: Recurrent miscarriage occurs in 1-5% of women at reproductive age. The most common cause of recurrent miscarriage is chromosomal abnormalities of the embryo (41%), chromosomal aberrations parents (10%), anatomical abnormalities of the uterus (5%), infectious and hormonal factors. In about 25% of women, no cause of recurrent miscarriage is usually found. Therefore it seems important to study all factors possibly inducing pregnancy disorders.
  
  
  OBJECTIVE
  The aim of this study was to find a difference in serum protein fractions between women with primary and secondary recurrent miscarriage.
  
  
  METHODS
  The study group consisted of 52 women (aged 36.0 +/- 4.9) with recurrent miscarriage. Nine of them (17%) reported one earlier regular pregnancy ending with childbirth without complications. Control group comprised 30 non-pregnant women (aged 36.1 +/- 3.6), who had given vaginal birth to healthy children at least twice. Serum protein fractions were separated by electrophoresis in the SDS PAGE buffer system using a Mini PROTEAN 3 cell device. BioRad SDS PAGE Molecular Weight Standards covering mass range of 6.5-200 kDa were used as a reference. Gels were stained with Coomassie Blue R 250 solution. BioRad QuantityOne software was used for the assessment of molecular weight of each protein fraction.
  
  
  RESULTS
  Electrophoretic separation revealed 39 protein fractions of 10,243 kDa. Particularly interesting was a 38 kDa fraction present exclusively in serum of women with recurrent pregnancy who had never given birth. Another fraction (74 kDa), not detected in the control group, was found in all women with recurrent pregnancy loss. Protein fractions of 76 and 151 kDa were present only in the control group.
  
  
  CONCLUSIONS
  The presence of the protein fractions of low- or mid-weight in serum from women with recurrent miscarriage may potentially play a role in the pathomechanism of this disorder
authors.affiliation: Department of Laboratory Medicine, Nicolaus Copernicus University in Torun, Collegium Medicum in Bydgoszcz, Poland. lenucha@o2.pl
authors.forename: Lena
authors.initials: L
authors.lastname: Nowak-Łoś
authors.forename: Grazyna
authors.initials: G
authors.lastname: Odrowaz-Sypniewska
authors.forename: Jolanta
authors.initials: J
authors.lastname: Zegarska
authors.forename: Marta
authors.initials: M
authors.lastname: Zalewska-Zacharek
authors.forename: Joanna
authors.initials: J
authors.lastname: Kłyszejko-Molska
authors.forename: Marek
authors.initials: M
authors.lastname: Grabiec
authors.forename: Rafał
authors.initials: R
authors.lastname: Adamczak
mesh_terms: D000026:Abortion, Habitual / Q000097:blood* / Q000175:diagnosis* / Q000276:immunology; D000328:Adult; D001798:Blood Proteins / Q000032:analysis* / Q000737:chemistry; D015331:Cohort Studies; D005260:Female; D006801:Humans; D008970:Molecular Weight; D011237:Predictive Value of Tests; D011247:Pregnancy; D011250:Pregnancy Complications, Hematologic / Q000175:diagnosis* / Q000276:immunology
chemical_list: D001798:Blood Proteins