Objective:To detect the varied expressions of bone development-related genes by PCR microarray in enhanced and interfered human chondrocytes-articular(HC-a) X-linked spondyloepiphyseal dysplasia tarda(SEDL) gene expression groups

respectively. Methods:The vectors which targeting enhanced SEDL adenovirus vector p Ad5-SEDL and interfered SEDL lentivirus plasmid LV-si SEDL were constructed previously. 293 T cells were transformed with p Ad5-SEDL and LV-si SEDL respectively

and packaged recombinant adenovirus p Ad5-SEDL and lentivirus LV-si SEDL were amplified by HEK293 cells. The virus was collected and the virus titers were detected. The recombinant adenovirus and lentivirus infected HC-a on optimal multiplicity of infection(MOI);the experiment was divided into four groups:enhanced group(HC- a / p Ad5- SEDL

p Ad5- SEDL infected HC-a)

reinforced the negative control group(HC-a/empty vector(p Ad5)

p Ad5 infected HC-a)

interference group(HC-a/LV-si SEDL

LV-si SEDL infected HC-a)

interference group negative control group(HC-a/empty vector(LV)

LV infected HC-a). SEDL gene expression was detected by q PCR;sedlin protein was detected by Western blot to verify whether the SEDL gene expression was interfered or enhanced successfully. Then cellular m RNA of four groups was collected and detected osteogenesis PCR array. Results:1High titer recombinant adenovirus p Ad5-SEDL was harvested and the viral titer was 2.6×1011pfu/ml. Both of recombinant adenovirus p Ad5-SEDL and lentivirus LV-si SEDL infected HC-a successfully. 2 SEDL gene expression was higher in enhanced group(2.14 ±0.36) than in negative control group(1.21 ±0.25)(P =0.022);SEDL gene expression was lower in interference group(0. 86 ± 0. 11) than in interference group negative control group(1.34±0.06)(P=0.003). Sedlin protein expression was increased in enhanced group(0.56±0.04)than in negative control group(0.37±0.05)(P=0.006);Sedlin protein expression was lower in interference group(0.13±0.02)than in negative control group(0.36±0.04)(P=0.001). 3Microarray results:after HC-a disturbance within the SEDL

gene chip results showed that 21 genes were up-regulated

5 genes were down-regulated. After the HC-a within SEDL gene enhanced osteogenesis

PCR array results showed that 27 genes were up-regulated

while 12 genes were down-regulation. The varied expression in interference showed a reverse change in enhanced group. There were five developmental genes associated with cartilage:COL2A

BMP3

FLT1

GDF10

IGF1. Conclusion:By enhancing or silencing the SEDL gene of chondrocytes

we find some bone growth-related genes

eg. COL2 A

BMP3

FLT1

GDF10

IGF1 express differentially

which may be associated with SEDL gene.