Topography-Guided Proliferation: Distinct Surface Microtopography Increases Proliferation of Chondrocytes In Vitro

Tissue Eng Part A. 2015 Nov;21(21-22):2757-65. doi: 10.1089/ten.TEA.2014.0697. Epub 2015 Oct 1.

Abstract

Chondrocyte-based cartilage repair techniques require control of articular chondrocyte expansion ex vivo. Articular chondrocytes have limited availability, and prolonged culturing to obtain a cell number sufficient for clinical use often results in phenotypic alterations and increased costs. In this study, we applied a screening library consisting of micrometer-sized topographical features, termed biosurface structure array (BSSA), to identify specific topographical microstructures affecting the proliferation of human chondrocytes in passage 1 (P1) or 2 (P2). The BSSA library comprised 10 patterns and 16 combinations of pillar size (X) and interpillar gap size (Y). Specific microstructures significantly increased the chondrocytes' proliferative responsiveness in term of patterns, X and Y for P2 compared with P1. The P1 and P2 chondrocytes responded independently to similar patterns after 4 days of culturing, whereas only chondrocytes at P2 responded to specific microstructures with Y = 1 μm and X = 2, 4 μm by a 2.3- and 4.4-fold increased proliferation, respectively. In conclusion, these findings indicate that specific surface topographies promote chondrocyte proliferation and may, indeed, be a tool to control the behavior of chondrocytes in vitro.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biocompatible Materials / chemistry*
  • Cell Proliferation / physiology*
  • Cells, Cultured
  • Chondrocytes / cytology*
  • Chondrocytes / physiology*
  • Equipment Design
  • Equipment Failure Analysis
  • Guided Tissue Regeneration / instrumentation*
  • Guided Tissue Regeneration / methods
  • Humans
  • Materials Testing
  • Surface Properties
  • Tissue Engineering / instrumentation*
  • Tissue Engineering / methods
  • Tissue Scaffolds

Substances

  • Biocompatible Materials