Tissue Eng Regen Med.  2017 Apr;14(2):93-101. 10.1007/s13770-017-0023-8.

Polycaprolactone Triol–Citrate Scaffolds Enriched with Human Platelet Releasates Promote Chondrogenic Phenotype and Cartilage Extracellular Matrix Formation

• Rothan HA
• Mahmod SA
• Djordjevic I
• Golpich M
• Yusof R
• Snigh S

• KMID: 2377339
• DOI: http://doi.org/10.1007/s13770-017-0023-8

Abstract

In this paper we report the differentiating properties of platelet-rich plasma releasates (PRPr) on human chondrocytes within elastomeric polycaprolactone triol-citrate (PCLT-CA) porous scaffold. Human-derived chondrocyte cellular content of glycosaminoglycans (GAGs) and total collagen were determined after seeding into PCLT-CA scaffold enriched with PRPr cells. Immunostaining and real time PCR was applied to evaluate the expression levels of chondrogenic and extracellular gene markers. Seeding of chondrocytes into PCLT-CA scaffold enriched with PRPr showed significant increase in total collagen and GAGs production compared with chondrocytes grown within control scaffold without PRPr cells. The mRNA levels of collagen II and SOX9 increased significantly while the upregulation in Cartilage Oligomeric Matrix Protein (COMP) expression was statistically insignificant. We also report the reduction of the expression levels of collagen I and III in chondrocytes as a consequence of proximity to PRPr cells within the scaffold. Interestingly, the pre-loading of PRPr caused an increase of expression levels of following extracellular matrix (ECM) proteins: fibronectin, laminin and integrin β over the period of 3 days. Overall, our results introduce the PCLT-CA elastomeric scaffold as a new system for cartilage tissue engineering. The method of PRPr cells loading prior to chondrocyte culture could be considered as a potential environment for cartilage tissue engineering as the differentiation and ECM formation is enhanced significantly.

Keyword

Cartilage tissue engineering; PCLT–CA scaffolds; PRPr cells; Human chondrocytes; ECM formation

MeSH Terms

Blood Platelets*
Cartilage Oligomeric Matrix Protein
Cartilage*
Chondrocytes
Collagen
Elastomers
Extracellular Matrix*
Fibronectins
Glycosaminoglycans
Humans*
Laminin
Methods
Phenotype*
Platelet-Rich Plasma
Real-Time Polymerase Chain Reaction
RNA, Messenger
Tissue Engineering
Up-Regulation
Collagen
Elastomers
Fibronectins
Glycosaminoglycans
Laminin
RNA, Messenger