Control of cellular activity of osteoblastic cells with microtopography of biphasic calcium phosphate scaffolds

Shinnosuke Okada, Yuya Oaki, Jun Komotori, Hiroaki Imai

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We studied the activity of osteoblastic cells on biphasic calcium phosphate (BCP) containing ca. 50 wt% hydroxyapatite and ca. 50 wt% β-tricalcium phosphate. The influence of the microtopography on the cellular activity was investigated by using three kinds of BCP scaffolds, which were composed of densely packed domains of 35μm in size (dense-BCP), a porous framework of 31μmin width (micro-BCP), and aggregated particles of 3100nm in diameter (nano-BCP). Basically, stable adhesion of the cells was achieved with defined focal adhesions on the BCP scaffolds regardless of their topography. The alkaline phosphatase (ALP) activity in the initial stage of the adhesion was more enhanced on micro- and nano-BCPs than it was on dense-BCPs due to the presence of a large number of calcium ions eluted from small grains in the micro- and nano-BCPs. However, the proliferation and the ALP activity were suppressed in the long-term culture on nano-BCP because of the limitation of the domain area for the formation of focal adhesions. Therefore, the cellular activity was successfully controlled with the surface microtopography of the scaffolds. The microstructured surface providing a sufficient domain area and essential ions would be suitable as a scaffold for osteoblastic cells.

Original languageEnglish
Pages (from-to)635-639
Number of pages5
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume119
Issue number1392
Publication statusPublished - 2011 Aug

Fingerprint

calcium phosphates
Calcium phosphate
Scaffolds
Cells
cells
adhesion
Adhesion
phosphatases
Phosphatases
Alkaline Phosphatase
Ions
Durapatite
hydroxyapatite-beta tricalcium phosphate
Hydroxyapatite
Topography
calcium
Calcium
phosphates
topography
ions

Keywords

  • β-tricalcium phosphate
  • Biphasic
  • Hydroxyapatite
  • Osteoblast
  • Topography

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry
  • Chemistry(all)
  • Condensed Matter Physics

Cite this

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abstract = "We studied the activity of osteoblastic cells on biphasic calcium phosphate (BCP) containing ca. 50 wt{\%} hydroxyapatite and ca. 50 wt{\%} β-tricalcium phosphate. The influence of the microtopography on the cellular activity was investigated by using three kinds of BCP scaffolds, which were composed of densely packed domains of 35μm in size (dense-BCP), a porous framework of 31μmin width (micro-BCP), and aggregated particles of 3100nm in diameter (nano-BCP). Basically, stable adhesion of the cells was achieved with defined focal adhesions on the BCP scaffolds regardless of their topography. The alkaline phosphatase (ALP) activity in the initial stage of the adhesion was more enhanced on micro- and nano-BCPs than it was on dense-BCPs due to the presence of a large number of calcium ions eluted from small grains in the micro- and nano-BCPs. However, the proliferation and the ALP activity were suppressed in the long-term culture on nano-BCP because of the limitation of the domain area for the formation of focal adhesions. Therefore, the cellular activity was successfully controlled with the surface microtopography of the scaffolds. The microstructured surface providing a sufficient domain area and essential ions would be suitable as a scaffold for osteoblastic cells.",
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T1 - Control of cellular activity of osteoblastic cells with microtopography of biphasic calcium phosphate scaffolds

AU - Okada, Shinnosuke

AU - Oaki, Yuya

AU - Komotori, Jun

AU - Imai, Hiroaki

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N2 - We studied the activity of osteoblastic cells on biphasic calcium phosphate (BCP) containing ca. 50 wt% hydroxyapatite and ca. 50 wt% β-tricalcium phosphate. The influence of the microtopography on the cellular activity was investigated by using three kinds of BCP scaffolds, which were composed of densely packed domains of 35μm in size (dense-BCP), a porous framework of 31μmin width (micro-BCP), and aggregated particles of 3100nm in diameter (nano-BCP). Basically, stable adhesion of the cells was achieved with defined focal adhesions on the BCP scaffolds regardless of their topography. The alkaline phosphatase (ALP) activity in the initial stage of the adhesion was more enhanced on micro- and nano-BCPs than it was on dense-BCPs due to the presence of a large number of calcium ions eluted from small grains in the micro- and nano-BCPs. However, the proliferation and the ALP activity were suppressed in the long-term culture on nano-BCP because of the limitation of the domain area for the formation of focal adhesions. Therefore, the cellular activity was successfully controlled with the surface microtopography of the scaffolds. The microstructured surface providing a sufficient domain area and essential ions would be suitable as a scaffold for osteoblastic cells.

AB - We studied the activity of osteoblastic cells on biphasic calcium phosphate (BCP) containing ca. 50 wt% hydroxyapatite and ca. 50 wt% β-tricalcium phosphate. The influence of the microtopography on the cellular activity was investigated by using three kinds of BCP scaffolds, which were composed of densely packed domains of 35μm in size (dense-BCP), a porous framework of 31μmin width (micro-BCP), and aggregated particles of 3100nm in diameter (nano-BCP). Basically, stable adhesion of the cells was achieved with defined focal adhesions on the BCP scaffolds regardless of their topography. The alkaline phosphatase (ALP) activity in the initial stage of the adhesion was more enhanced on micro- and nano-BCPs than it was on dense-BCPs due to the presence of a large number of calcium ions eluted from small grains in the micro- and nano-BCPs. However, the proliferation and the ALP activity were suppressed in the long-term culture on nano-BCP because of the limitation of the domain area for the formation of focal adhesions. Therefore, the cellular activity was successfully controlled with the surface microtopography of the scaffolds. The microstructured surface providing a sufficient domain area and essential ions would be suitable as a scaffold for osteoblastic cells.

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