Bioinspired calcium phosphate mineralization on Net-Shape-Nonwoven chitosan scaffolds stimulates human bone marrow stromal cell differentiation

Biomed Mater. 2019 Jun 19;14(4):045017. doi: 10.1088/1748-605X/ab27a4.

Abstract

Chitosan fibers were processed using the Net-Shape-Nonwoven (NSN) technique in order to create porous scaffolds which were functionalized in two bioinspired ways: collagen type I coating and unique mineralization with organically modified hydroxyapatite (ormoHAP). While collagen is common to enhance cell attachment on surfaces, the electric-field assisted migration and deposition of ormoHAP on the surface of the NSN-scaffolds is a novel technique which enables sub-micrometer sized mineralization while maintaining the original pore structure. Microscopy revealed fast attachment and morphological adaptation of the cells on both, the pure and the functionalized NSN-scaffolds. Remarkably, the cell number of osteogenically induced hBMSC on ormoHAP-modified NSN-scaffolds increased 3.5-5 fold compared to pure NSN-scaffolds. Osteogenic differentiation of hBMSC/osteoblasts was highest on collagen-functionalized NSN-scaffolds. RT-PCR studies revealed gene expression of ALP, BSP II, and osteocalcin to be high for all NSN-scaffolds. Overall, the NSN-scaffold functionalization with collagen and ormoHAP improved attachment, proliferation, and differentiation of hBMSC and therefore revealed the remarkable potential of their application for the tissue engineering of bone.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Animals
  • Biocompatible Materials / chemistry*
  • Calcium Phosphates / chemistry*
  • Cattle
  • Cell Adhesion
  • Cell Differentiation
  • Cell Proliferation
  • Chitosan / chemistry*
  • Collagen / chemistry
  • Durapatite / chemistry
  • Female
  • Humans
  • Mesenchymal Stem Cells / cytology*
  • Osteoblasts / cytology
  • Osteogenesis
  • Tissue Engineering / methods
  • Tissue Scaffolds / chemistry*
  • X-Ray Microtomography
  • Young Adult

Substances

  • Biocompatible Materials
  • Calcium Phosphates
  • Collagen
  • Chitosan
  • Durapatite
  • calcium phosphate