Increased expression of RNA binding protein GNL3 has potential influence
on osteoarthritis by up-regulating IL24 and PTN
Abstract
Osteoarthritis (OA) is a degenerative joint disorder which affects about
80% of the population above 65 years revealing radiographic evidence of
OA. Recently, more and more researches have been conducted on the
molecular mechanism of OA to find target treatments. RNA binding
proteins (RBPs) play a key role in genome regulation. Nucleolar
GTP-binding Protein 3 (GNL3) is abundantly expressed in bone marrow
mesenchymal stem cells and correlates with chondrocytes differentiation.
Here we report the transcriptome study of GNL3, which regulates
transcription in osteoarthritis (OA). In this study, RNA sequencing
(RNA-seq) was used to analyze the global transcription level in HeLa
cells. The results showed that the expression of IL24 and PTN was
down-regulated when GNL3 was knocked down. Likewise, in the lesions of
osteoarthritis, the expression level of GNL3, IL24 and PTN gene were
significantly up-regulated compared with the control group. IL24
contributes to the progression of osteoarthritis by inducing bone cells
apoptosis at the joint, and PTN contributes to the progression of
osteoarthritis by promoting angiogenesis. This study aimed to assess the
association between GNL3 and both of these two downstream genes as a
potential biomarker for investigating the development of OA.