PEDF Is Associated with the Termination of Chondrocyte Phenotype and Catabolism of Cartilage Tissue

Klinger P, Lukassen S, Ferrazzi F, Ekici AB, Hotfiel T, Swoboda B, Aigner T, Gelse K (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Book Volume: 2017

Pages Range: 7183516

DOI: 10.1155/2017/7183516

Abstract

Objective. To investigate the expression and target genes of pigment epithelium-derived factor (PEDF) in cartilage and chondrocytes, respectively. Methods. We analyzed the expression pattern of PEDF in different human cartilaginous tissues including articular cartilage, osteophytic cartilage, and fetal epiphyseal and growth plate cartilage, by immunohistochemistry and quantitative real-time (qRT) PCR. Transcriptome analysis after stimulation of human articular chondrocytes with rhPEDF was performed by RNA sequencing (RNA-Seq) and confirmed by qRT-PCR. Results. Immunohistochemically, PEDF could be detected in transient cartilaginous tissue that is prone to undergo endochondral ossification, including epiphyseal cartilage, growth plate cartilage, and osteophytic cartilage. In contrast, PEDF was hardly detected in healthy articular cartilage and in the superficial zone of epiphyses, regions that are characterized by a permanent stable chondrocyte phenotype. RNA-Seq analysis and qRT-PCR demonstrated that rhPEDF significantly induced the expression of a number of matrix-degrading factors including SAA1, MMP1, MMP3, and MMP13. Simultaneously, a number of cartilage-specific genes including COL2A1, COL9A2, COMP, and LECT were among the most significantly downregulated genes. Conclusions. PEDF represents a marker for transient cartilage during all neonatal and postnatal developmental stages and promotes the termination of cartilage tissue by upregulation of matrix-degrading factors and downregulation of cartilage-specific genes. These data provide the basis for novel strategies to stabilize the phenotype of articular cartilage and prevent its degradation.

Authors with CRIS profile

Involved external institutions

Klinikum Coburg Germany (DE)

How to cite

APA:

Klinger, P., Lukassen, S., Ferrazzi, F., Ekici, A.B., Hotfiel, T., Swoboda, B.,... Gelse, K. (2017). PEDF Is Associated with the Termination of Chondrocyte Phenotype and Catabolism of Cartilage Tissue. BioMed Research International, 2017, 7183516. https://doi.org/10.1155/2017/7183516

MLA:

Klinger, Patricia, et al. "PEDF Is Associated with the Termination of Chondrocyte Phenotype and Catabolism of Cartilage Tissue." BioMed Research International 2017 (2017): 7183516.

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