title: Effect of gamma radiation on the expression of mRNA growth factors in glycerol cryopreserved human amniotic membrane.
abstract: Human amniotic membrane (HAM) due to its high biocompatibility, low immunogenicity, anti-microbial, anti-viral properties as well as the presence of growth factors has been used in various clinical applications. The growth factors play an important role in wound healing. The current study aimed to explore the effect of 15 kGy gamma radiation dose on selected growth factors and receptors mRNA present in HAM. Eight growth factors, namely, EGF, HGF, KGF, TGF-α, TGF-β1, TGF-β2, TGF-β3 and bFGF and two growth factor receptors, HGFR and KGFR were evaluated in this study. The total RNA was extracted and converted to complimentary DNA using commercial kits. Subsequently, the mRNA expressions of these growth factors were evaluated using real-time PCR and the results were statistically analyzed using REST-MCS software. This study confirmed the presence of these mRNA growth factors and receptors in fresh, glycerol cryopreserved and irradiated glycerol cryopreserved HAM. In glycerol cryopreserved HAM, the results showed up-regulation of HGF and bFGF and down-regulation of EGF, HGFR, KGF, KGFR, TGF-α, TGF-β1, TGF-β2 and TGF-β3 relative to the fresh HAM which acted as the control, whereas in irradiated glycerol cryopreserved HAM, the results showed up-regulation of EGF, HGF, KGF, KGFR, TGF-β1, TGF-β2 and TGF-β3 and down-regulation of HGFR, TGF-α and bFGF relative to the glycerol cryopreserved HAM which acted as the control. However, these mRNA expressions did not show any statistical significant difference compared to the control groups. This study concluded that a dose of 15 kGy of gamma radiation did not affect the mRNA expression for the growth factors' and receptors' in the glycerol cryopreserved HAM.
authors.affiliation: Tissue Bank, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, 16150, Kubang Kerian, Kelantan, Malaysia.
authors.forename: Rusidah Mat
authors.initials: RM
authors.lastname: Yatim
authors.affiliation: School of Dental Sciences, Universiti Sains Malaysia, Health Campus, 16150, Kubang Kerian, Kelantan, Malaysia. kannan@usm.my.|Human Genome Centre, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, 16150, Kubang Kerian, Kelantan, Malaysia. kannan@usm.my.
authors.forename: Thirumulu Ponnuraj
authors.initials: TP
authors.lastname: Kannan
authors.affiliation: Tissue Bank, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, 16150, Kubang Kerian, Kelantan, Malaysia.
authors.forename: Suzina Sheikh
authors.initials: SS
authors.lastname: Ab Hamid
mesh_terms: D000650:Amnion / Q000187:drug effects / Q000378:metabolism* / Q000528:radiation effects*; D015925:Cryopreservation / Q000379:methods; D003451:Cryoprotective Agents / Q000494:pharmacology; D005260:Female; D005720:Gamma Rays; D015870:Gene Expression / Q000187:drug effects / Q000528:radiation effects*; D005990:Glycerol / Q000494:pharmacology; D006801:Humans; D036341:Intercellular Signaling Peptides and Proteins / Q000235:genetics*; D012333:RNA, Messenger / Q000235:genetics*; D017978:Receptors, Growth Factor / Q000235:genetics
chemical_list: D003451:Cryoprotective Agents; D036341:Intercellular Signaling Peptides and Proteins; D012333:RNA, Messenger; D017978:Receptors, Growth Factor; D005990:Glycerol
keywords: Gamma radiation; Gene expression; Glycerol cryopreservation; Growth factors; Human amniotic membrane