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Abstract:

The modulation of purinergic receptors plays an important role in the regulation of bone formation by the osteoblast. On the other hand, bone morphogenetic proteins (BMPs), members of the transforming growth factor-β superfamily, regulate the differentiation of osteoprogenitor bone cells and stimulate bone formation. In this study, we investigate the effects of several nucleotides on osteoblast differentiation and function, and their relation with the gene expression of osteogenic proteins BMP-2, BMP-4 and BMP-5 as well as of differentiation markers alkaline phosphatase (ALP) and bone sialoprotein (BSP). Our results indicate that 100μM ATP, ATPγS and UTP, but not ADP, ADPβS or UDP, promote ALP activity in rat primary osteoblasts, showing a peak about day 7 of the treatment. ATP, ATPγS and UTP also increase the mRNA levels of ALP, BMP-2, BMP-4, BMP-5 and BSP. Both the ALP activity and ALP and BMP-4 mRNA increments induced by ATP and UTP are inhibited by Ly294002, a PI3K inhibitor, suggesting the involvement of PI3K/AKT signaling pathway in purinergic modulation of osteoblast differentiation. Furthermore, bone mineralization enhance 1 and 1.5 fold after culturing osteoblasts in the presence of 100μM ATP or UTP, respectively, but not of ADP or UDP for 22 days. This information suggests that P2Y2 receptors (responsive to ATP, ATPγS and UTP) enhance osteoblast differentiation involving PI3K/AKT signaling pathway activation and gene expression induction of ALP, BMP-2, BMP-4, BMP-5 and BSP. Our findings state a novel molecular mechanism that involves specific gene expression activation of osteoblast function by the purinoreceptors, which would be of help in setting up new pharmacological strategies for the intervention in bone loss pathologies. © 2013 Elsevier Inc.

Registro:

Documento: Artículo
Título:ATP and UTP stimulate bone morphogenetic protein-2,-4 and -5 gene expression and mineralization by rat primary osteoblasts involving PI3K/AKT pathway
Autor:Ayala-Peña, V.B.; Scolaro, L.A.; Santillán, G.E.
Filiación:Departamento de Biología Bioquímica y Farmacia, Universidad Nacional del Sur, San Juan 670, Bahía Blanca, Buenos Aires B8000ICN, Argentina
Laboratorio de Virología, Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, Piso 4, Buenos Aires 1428, Argentina
Palabras clave:ATP; BMPs; Osteoblast; PI3K/AKT; Purinergic receptor; UTP; 2 morpholino 8 phenylchromone; adenosine diphosphate; adenosine triphosphate; alkaline phosphatase; bone morphogenetic protein; bone morphogenetic protein 2; bone morphogenetic protein 4; bone morphogenetic protein 5; calcium; messenger RNA; phosphatidylinositol 3 kinase; protein kinase B; purinergic receptor; uridine diphosphate; uridine triphosphate; animal cell; article; bone cell; bone development; bone mineralization; cell differentiation; cell lysate; cell proliferation; cell structure; controlled study; enzyme activity; newborn; nonhuman; ossification; osteoblast; osteolysis; priority journal; protein expression; rat; signal transduction; Rattus
Año:2013
Volumen:319
Número:13
Página de inicio:2028
Página de fin:2036
DOI: http://dx.doi.org/10.1016/j.yexcr.2013.05.006
Título revista:Experimental Cell Research
Título revista abreviado:Exp. Cell Res.
ISSN:00144827
CODEN:ECREA
CAS:2 morpholino 8 phenylchromone, 154447-36-6; adenosine diphosphate, 20398-34-9, 58-64-0; adenosine triphosphate, 15237-44-2, 56-65-5, 987-65-5; alkaline phosphatase, 9001-78-9; calcium, 7440-70-2, 14092-94-5; phosphatidylinositol 3 kinase, 115926-52-8; protein kinase B, 148640-14-6; uridine diphosphate, 58-98-0; uridine triphosphate, 63-39-8
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00144827_v319_n13_p2028_AyalaPena

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Citas:

---------- APA ----------
Ayala-Peña, V.B., Scolaro, L.A. & Santillán, G.E. (2013) . ATP and UTP stimulate bone morphogenetic protein-2,-4 and -5 gene expression and mineralization by rat primary osteoblasts involving PI3K/AKT pathway. Experimental Cell Research, 319(13), 2028-2036.
http://dx.doi.org/10.1016/j.yexcr.2013.05.006
---------- CHICAGO ----------
Ayala-Peña, V.B., Scolaro, L.A., Santillán, G.E. "ATP and UTP stimulate bone morphogenetic protein-2,-4 and -5 gene expression and mineralization by rat primary osteoblasts involving PI3K/AKT pathway" . Experimental Cell Research 319, no. 13 (2013) : 2028-2036.
http://dx.doi.org/10.1016/j.yexcr.2013.05.006
---------- MLA ----------
Ayala-Peña, V.B., Scolaro, L.A., Santillán, G.E. "ATP and UTP stimulate bone morphogenetic protein-2,-4 and -5 gene expression and mineralization by rat primary osteoblasts involving PI3K/AKT pathway" . Experimental Cell Research, vol. 319, no. 13, 2013, pp. 2028-2036.
http://dx.doi.org/10.1016/j.yexcr.2013.05.006
---------- VANCOUVER ----------
Ayala-Peña, V.B., Scolaro, L.A., Santillán, G.E. ATP and UTP stimulate bone morphogenetic protein-2,-4 and -5 gene expression and mineralization by rat primary osteoblasts involving PI3K/AKT pathway. Exp. Cell Res. 2013;319(13):2028-2036.
http://dx.doi.org/10.1016/j.yexcr.2013.05.006