title: [Expression profile of TGF-β1 and BMP-7 in serum of preterm infants with respiratory distress syndrome].
abstract: OBJECTIVE
  To study the expression profile and significance of serum transforming growth factor-beta 1 (TGF-β1) and bone morphogenetic protein-7 (BMP-7) in preterm infants with respiratory distress syndrome (RDS).
  
  
  METHODS
  Thirty-two preterm infants with RDS who were given pulmonary surfactant (PS) within 12 hours after birth were enrolled as the PS group. Twenty-eight preterm infants with RDS who were not given PS were selected as the non-PS group. Another 30 preterm infants without RDS were used as the control group. Serum levels of TGF-β1 and BMP-7 in the three groups were measured using enzyme-linked immunosorbent assay at 0, 1, 3, and 7 days after birth.
  
  
  RESULTS
  The PS group had higher serum levels of TGF-β1 than the control group at 1 and 3 days after birth (P<0.05). The non-PS group had significantly higher serum levels of TGF-β1 than the control group at 1, 3, and 7 days after birth (P<0.05), and serum levels of TGF-β1 in the non-PS group were significantly higher than the PS group at 3 and 7 days after birth (P<0.05). The PS group had higher serum levels of BMP-7 than the control group at 1 and 3 days after birth (P<0.05). The non-PS group had higher serum levels of BMP-7 than the control group at 1, 3, and 7 days after birth (P<0.05). The levels of BMP-7 in the non-PS group at 7 days after birth were reduced than before, but were still higher than in the PS group (P<0.05).
  
  
  CONCLUSIONS
  Both serum TGF-β1 and BMP-7 levels increase in the early stage in preterm infants with RDS, however, in the late stage, the expression of BMP-7 decreases with the increase in TGF-β1 expression, suggesting that administration of exogenous BMP-7 may reduce the expression of TGF-β1, which might be a therapeutic approach for RDS in preterm infants.
authors.affiliation: Department of Neonatology, Second Affiliated Hospital of Xi'an Medical College, Xi'an 037008, China. lixqsxmu@163.com.
authors.forename: Xiao-Qing
authors.initials: XQ
authors.lastname: Li
authors.forename: Ling-Fang
authors.initials: LF
authors.lastname: Zheng
mesh_terms: D055419:Bone Morphogenetic Protein 7 / Q000097:blood*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D008297:Male; D012127:Respiratory Distress Syndrome, Newborn / Q000097:blood*; D053773:Transforming Growth Factor beta1 / Q000097:blood*
chemical_list: D055419:Bone Morphogenetic Protein 7; D053773:Transforming Growth Factor beta1