BACKGROUND: MicroRNAs (miRNAs) are a class of small, functional, noncoding RNAs of 19 to 23 nucleotides which induce degradation of specific messenger RNAs (mRNAs), thus controlling the translational process (ie, synthesis of proteins from mRNAs). In addition, mRNAs regulate the promoter of specific miRNAs activating an autoregulatory feedback loop. PURPOSE: Titanium and zirconium dioxide ceramics (ZDCs) are used to make dental implants. Because the molecular mechanism by which ZDC and Ti act on osteoblasts is incompletely understood, we attempted to get more information by comparing the effect of ZDC and Ti on osteoblast miRNAs. MATERIALS AND METHODS: By using miRNA microarray technique, we identified in osteoblast-like cell line (MG63) grown on grade 3 Ti and ZDC disks several miRNAs whose expression was modified. We collected mRNAs after 24 hours of cell culturing to better understand molecular events related to early bone healing around inserted implants. An mRNA microarray technique was then performed as a control. RESULTS: There were six up- and four down-regulated miRNAs. Because every miRNA regulates hundreds of genes, we focused only on those related to bone formation. Among them, the most notable are BMP4 and 7, which are both up-regulated in osteoblasts cultured on Ti disks. CONCLUSION: The detected miRNAs differentially expressed in osteoblast-like cells grown on ZDC versus Ti act on a limited number of miRNAs and bone-related genes. The most notable are BMP4 and 7, which are more expressed in osteoblasts exposed to Ti surface. Consequently, we suggest that Ti surfaces could provide some advantages to immediate load implantology.
BACKGROUND: MicroRNAs (miRNAs) are a class of small, functional, noncoding RNAs of 19 to 23 nucleotides which induce degradation of specific messenger RNAs (mRNAs), thus controlling the translational process (ie, synthesis of proteins from mRNAs). In addition, mRNAs regulate the promoter of specific miRNAs activating an autoregulatory feedback loop. PURPOSE:Titanium and zirconium dioxide ceramics (ZDCs) are used to make dental implants. Because the molecular mechanism by which ZDC and Ti act on osteoblasts is incompletely understood, we attempted to get more information by comparing the effect of ZDC and Ti on osteoblast miRNAs. MATERIALS AND METHODS: By using miRNA microarray technique, we identified in osteoblast-like cell line (MG63) grown on grade 3 Ti and ZDC disks several miRNAs whose expression was modified. We collected mRNAs after 24 hours of cell culturing to better understand molecular events related to early bone healing around inserted implants. An mRNA microarray technique was then performed as a control. RESULTS: There were six up- and four down-regulated miRNAs. Because every miRNA regulates hundreds of genes, we focused only on those related to bone formation. Among them, the most notable are BMP4 and 7, which are both up-regulated in osteoblasts cultured on Ti disks. CONCLUSION: The detected miRNAs differentially expressed in osteoblast-like cells grown on ZDC versus Ti act on a limited number of miRNAs and bone-related genes. The most notable are BMP4 and 7, which are more expressed in osteoblasts exposed to Ti surface. Consequently, we suggest that Ti surfaces could provide some advantages to immediate load implantology.
Authors: Sabine A S Langie; Gudrun Koppen; Daniel Desaulniers; Fahd Al-Mulla; Rabeah Al-Temaimi; Amedeo Amedei; Amaya Azqueta; William H Bisson; Dustin G Brown; Gunnar Brunborg; Amelia K Charles; Tao Chen; Annamaria Colacci; Firouz Darroudi; Stefano Forte; Laetitia Gonzalez; Roslida A Hamid; Lisbeth E Knudsen; Luc Leyns; Adela Lopez de Cerain Salsamendi; Lorenzo Memeo; Chiara Mondello; Carmel Mothersill; Ann-Karin Olsen; Sofia Pavanello; Jayadev Raju; Emilio Rojas; Rabindra Roy; Elizabeth P Ryan; Patricia Ostrosky-Wegman; Hosni K Salem; A Ivana Scovassi; Neetu Singh; Monica Vaccari; Frederik J Van Schooten; Mahara Valverde; Jordan Woodrick; Luoping Zhang; Nik van Larebeke; Micheline Kirsch-Volders; Andrew R Collins Journal: Carcinogenesis Date: 2015-06 Impact factor: 4.944
Authors: Rogerio B Kato; Bhaskar Roy; Fabiola S De Oliveira; Emanuela P Ferraz; Paulo T De Oliveira; Austin G Kemper; Mohammad Q Hassan; Adalberto L Rosa; Marcio M Beloti Journal: J Cell Physiol Date: 2014-11 Impact factor: 6.384
Authors: A Moorthi; S Vimalraj; C Avani; Zhiming He; Nicola C Partridge; N Selvamurugan Journal: Int J Biol Macromol Date: 2013-03-01 Impact factor: 6.953
Authors: Nathan P Thomas; Nhiem Tran; Phong A Tran; Jerry L Walters; John D Jarrell; Roman A Hayda; Christopher T Born Journal: J Mater Sci Mater Med Date: 2013-11-17 Impact factor: 3.896