RT - Journal Article T1 - THE EFFECTS OF CRYOPRESERVATION AND LYOPHILIZATION ON ENDOTHELIAL CELLS ADHESION TO HUMAN AMNIOTIC MEMBRANE JF - URMIAMJ YR - 2013 JO - URMIAMJ VO - 24 IS - 10 UR - http://umj.umsu.ac.ir/article-1-1981-en.html SP - 753 EP - 762 K1 - Amnion K1 - Cryopreservation K1 - Lyophilization K1 - Endothelial cells K1 - Adhesion K1 - Extracellular matrix AB - Background & Aims: Human amniotic membrane has some specific properties making it an appropriate biomaterial for using in vascular tissue engineering. In this study, amniotic membrane was preserved with different methods. Effects of preservation on amniotic extracellular matrix and adhesion of cultured endothelial cells to membrane were compared with fresh samples of amniotic membrane. Materials & Methods: Human amniotic membrane was preserved with cryopreservation (-80 ̊C for 12 month) or lyophilization methods. Extracellular matrix components were assayed with immunohistochemistry method. The adhesion of cultured endothelial cells was studied with MTT assay. Results between groups were compared with ANOVA (Post-test Tukey). Results: Results demonstrated that extracellular matrix components were same in cryopreserved samples in comparison to fresh ones but there are some differences in lyophilized samples. Adhesion of endothelial cells to lyophilized samples was significantly more than cryopreserved or fresh samples (P Value < 0.05). Conclusion: Both cryopreservation and lyophilization affect extracellular matrix of human amniotic membrane which can determine the rate of the adhesion of endothelial cells to amniotic membrane. Lyophilized amniotic membrane is a better choice for culture of endothelial cells in vascular tissue engineering. SOURCE: URMIA MED J 2013: 24(10): 762 ISSN: 1027-3727 LA eng UL http://umj.umsu.ac.ir/article-1-1981-en.html M3 ER -