title: [Growth Factors and Interleukins in Amniotic Membrane Tissue Homogenate].
abstract: OBJECTIVE
  Application of amniotic membrane homogenate eye drops may be a potential treatment alternative for therapy resistant corneal epithelial defects. The purpose of this study was to determine the concentrations of epidermal growth factor (EGF), fibroblast growth factor basic (bFGF), hepatocyte growth factor (HGF), keratinocyte growth factor (KGF), interleukin-6 (IL-6) and interleukin-8 (IL-8) in amniotic membrane homogenates.
  
  
  METHODS
  Amniotic membranes of 8 placentas were prepared and thereafter stored at - 80 °C using the standard methods of the LIONS Cornea Bank Saar-Lor-Lux, Trier/Westpfalz. Following defreezing, amniotic membranes were cut in two pieces and homogenized in liquid nitrogen. One part of the homogenate was prepared in cell-lysis buffer, the other part was prepared in PBS. The tissue homogenates were stored at - 20 °C until enzyme-linked immunosorbent assay (ELISA) analysis for EGF, bFGF, HGF, KGF, IL-6 and IL-8 concentrations.
  
  
  RESULTS
  Concentrations of KGF, IL-6 and IL-8 were below the detection limit using both preparation techniques. The EGF concentration in tissue homogenates treated with cell-lysis buffer (2412 pg/g tissue) was not significantly different compared to that of tissue homogenates treated with PBS (1586 pg/g tissue, p = 0.72). bFGF release was also not significantly different using cell-lysis buffer (3606 pg/g tissue) or PBS treated tissue homogenates (4649 pg/g tissue, p = 0.35). HGF release was significantly lower using cell-lysis buffer (23,555 pg/g tissue), compared to PBS treated tissue (47,766 pg/g tissue, p = 0.007).
  
  
  CONCLUSIONS
  Containing EGF, bFGF and HGF, and lacking IL-6 and IL-8, the application of amniotic membrane homogenate eye drops may be a potential treatment alternative for therapy-resistant corneal epithelial defects.
authors.affiliation: Klinik für Augenheilkunde, Universitätsklinikum des Saarlandes UKS, Homburg/Saar.
authors.forename: T
authors.initials: T
authors.lastname: Stachon
authors.affiliation: Klinik für Augenheilkunde, LIONS-Hornhautbank, Saar-Lor-Lux, Trier/Westpfalz, Homburg/Saar.
authors.forename: M
authors.initials: M
authors.lastname: Bischoff
authors.affiliation: Klinik für Augenheilkunde, Universitätsklinikum des Saarlandes UKS, Homburg/Saar.
authors.forename: B
authors.initials: B
authors.lastname: Seitz
authors.affiliation: Klinik für Augenheilkunde, Universitätsklinikum des Saarlandes UKS, Homburg/Saar.
authors.forename: M
authors.initials: M
authors.lastname: Huber
authors.affiliation: Klinik für Augenheilkunde, Universitätsklinikum des Saarlandes UKS, Homburg/Saar.
authors.forename: M
authors.initials: M
authors.lastname: Zawada
authors.affiliation: Institut für Experimentelle Ophthalmologie, Universität des Saarlandes, Homburg/Saar.
authors.forename: A
authors.initials: A
authors.lastname: Langenbucher
authors.affiliation: Klinik für Augenheilkunde, Universitätsklinikum des Saarlandes UKS, Homburg/Saar.
authors.forename: N
authors.initials: N
authors.lastname: Szentmáry
mesh_terms: D000650:Amnion / Q000737:chemistry*; D036341:Intercellular Signaling Peptides and Proteins / Q000032:analysis* / Q000737:chemistry; D007378:Interleukins / Q000032:analysis* / Q000737:chemistry; D008422:Materials Testing; D009883:Ophthalmic Solutions / Q000032:analysis* / Q000737:chemistry*
chemical_list: D036341:Intercellular Signaling Peptides and Proteins; D007378:Interleukins; D009883:Ophthalmic Solutions