ABSTRACT
Objective To investigate the effect of ectodysplasin A (EDA‐A1) gene of hypohidrotic ectodermal dysplasia on pro‐liferation and cell cycle of human umbilical vein endothelial cell (ECV304). Methods Recombinant eukaryotic expression vectors pcDNA3. 1(‐)‐EDA‐A1‐M /W (mutant, M and wild, W) containing the coding sequence were transected into ECV304 cells. EDA‐A1 gene was amplified by reverse transcription polymerase chain reaction (RT‐PCR), and the protein was detected by Western blot. Cell viability and cycle distribution were invested by MTT and Flow cytometry (FCM ). Results The EDA‐A1 gene and pro‐tein were detected respectively by RT‐PCR and Western blot in ECV cells transfected with pcDNA3. 1(‐)‐EDA‐A1‐M /W, but not in ECV cells transfected with plasmid pcDNA3. 1(‐) and cells without transection. And also, compared with control groups, EDA‐A1 gene mutant significantly decreased proliferation of ECV cells and its inhibition rate was 45. 70% ( P 0. 05). A significant increase of the G0 /G1 and S fraction was seen in the ECV cells of mutant group, compared with wild group with an accumulation in S phase and a concomitant decrease in G2 /M phase population (P< 0. 05). Conclusion Mutant and wild EDA‐A1 gene may have distinct biological functions on proliferation and cell cycle distribution of cultured human umbilical vein endothelial cell.