Table 3.

Differential expression detected by microarray versus that detected by real-time RT-PCR between hTERT-OA 13AFLS and hTERT-RA 516 FLS. Numbers are the ratio of the relative expression level of a gene in hTERT-OA 13A FLS to the relative expression level of a gene in hTERT-RA 516 FLS.

Gene	Microarray (passage 8)	Microarray (passage 25)	RT-PCR (passage 25)	Description
HLA-DRA	2.5	82	89.6	Major histocompatibility complex, class II, DR alpha
MGST1	4.5	164	230.1	Microsomal glutathione S-transferase 1
RAB27B	4.3	6.8	16.6	Ras-related GTP-binding protein 27b, GTP-binding protein and GTPase
MMP1	–	1.74	5.2	Matrix metalloproteinase 1
COL5A3	–	11.38	12.41	Collagen, type III, Alpha 1
COL8A2	–	8.04	12.28	Collagen, type V, alpha 3
ADAMTS1	0.16	0.20	0.36	ADAM metallopeptidase with thrombospondin type 1 motif 1