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  • ISSN 1674-8301
  • CN 32-1810/R
Volume 29 Issue 4
Jun.  2015
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Tanja Stachon, Jiong Wang, Xufei Song, Achim Langenbucher, Berthold Seitz, No´ra Szentma´ry. Impact of crosslinking/riboflavin-UVA-photodynamic inactivation on viability, apoptosis and activation of human keratocytes in vitro[J]. The Journal of Biomedical Research, 2015, 29(4): 321-325. DOI: 10.7555/JBR.29.20130173
Citation: Tanja Stachon, Jiong Wang, Xufei Song, Achim Langenbucher, Berthold Seitz, No´ra Szentma´ry. Impact of crosslinking/riboflavin-UVA-photodynamic inactivation on viability, apoptosis and activation of human keratocytes in vitro[J]. The Journal of Biomedical Research, 2015, 29(4): 321-325. DOI: 10.7555/JBR.29.20130173
shu

Impact of crosslinking/riboflavin-UVA-photodynamic inactivation on viability, apoptosis and activation of human keratocytes in vitro

  • 1.

    Department of Ophthalmology, Saarland University Medical Center, Homburg, Saar 66424, Germany

  • 2.

    Department of Ophthalmology, Renmin Hospital of Wuhan University, Wuhan, Hubei 43060, China

  • 3.

    Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, Jilin 130041, China

  • 4.

    Experimental Ophthalmology, Saarland University, Homburg, Saar 66424, Germany.

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  • Received Date: November 07, 2015
    Graphical Abstract
    • Abstract
  • Riboflavin-UVA photodynamic inactivation is a potential treatment alternative in therapy resistant infectious keratitis. The purpose of our study was to determine the impact of riboflavin-UVA photodynamic inactivation on viability, apop- tosis and activation of human keratocytes in vitro. Primary human keratocytes were isolated from human corneal buttons and cultured in DMEM/Ham9s F12 medium supplemented with 10% fetal calf serum. Keratocytes underwent UVA light illumination (375 nm) for 4.10 minutes (2 J/cm 2) during exposure to different concentrations of riboflavin. Twenty-four hours after treatment, cell viability was evaluated photometrically, whereas apoptosis, CD34 and alpha-smooth muscle actin (a-SMA) expression were assessed using flow cytometry. We did not detect significant changes in cell viability, apoptosis, CD34 and a-SMA expression in groups only treated with riboflavin or UVA light. In the group treated with riboflavin-UVA-photodynamic inactivation, viability of keratocytes decreased significantly at 0.1% riboflavin (P,0.01) while the percentage of CD34 (P,0.01 for both 0.05% and 0.1% riboflavin) and alpha-SMA positive keratocytes (P,0.01 and P,0.05 for 0.05% and 0.1% riboflavin, respectively) increased significantly compared to the controls. There was no significant change in the percentage of apoptotic keratocytes compared to controls at any of the used ribo- flavin concentrations (P50.09 and P50.13). We concluded that riboflavin-UVA-photodynamic-inactivation decreases viability of myofibroblastic transformation and multipotent haematopoietic stem cell transformation; however, it does not have an impact on apoptosis of human keratocytes in vitro.
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