[Effects of HOXB2 antisense oligodeoxynucleotides on the biological properties of primary human umbilical vein endothelial cells].
OBJECTIVE
To explore the effects of HOXB2 antisense oligodeoxynuc leotides (Asodn) on the biological properties of primary human umbilical vein endothelial cells (ECs).


METHODS
Fluorescent labelled Asodn was transfected into the endothelial cells of human unbilical vein mediated liposome and its distribution within endothelia was observed. (3)H-TdR incorporation test was employed to determine its effects on the DNA synthesis. Flow cytometry was applied to determine the change of the cell cycle. In the same time, RT-PCR was adopted to study the influence of Asodn on the expression of target genes.


RESULTS
Fifteen minutes after the transfection, weak nucleic staining was observed. The fluorescent staining was the strongest 4 approximately 8 hours after the transfection and began to weaken in 16 hours. The proportion of cells in G1/0 phase in Asodn group was 53.4 +/- 3.1, significantly higher than that in control group (35.8 +/- 7.3, P < 0.01), and the proportion of cells in S phase in Asodn group was 42.2 +/- 3.5, significantly lower than that in control group (60.8 +/- 6.2, P < 0.01). The expression of HOXB2 mRNA was remarkably decreased during 24 to 48 hours.


CONCLUSIONS
HOXB2 Asodn exerts inhibitory effects on EC proliferation dose-dependently, delays the conversion of G1 phase to S Phase, and inhibits the expression of HOXB2 mRNA. HOXB2 gene plays an important role in proliferation of endothelial cells and the mechanism is related to cell cycle.
Zhang
Xiaoqi
X
Institute of Burn Research, Southwestern Hospital, Third Military Medical University, Chongqing 400038  China.
Liu
Xusheng
X
D002453:Cell Cycle; D002455:Cell Division; D002478:Cells, Cultured; D004730:Endothelium, Vascular / Q000166:cytology* / Q000187:drug effects; D018398:Homeodomain Proteins / Q000235:genetics*; D006801:Humans; D020319:Oligodeoxyribonucleotides, Antisense / Q000494:pharmacology*; D014157:Transcription Factors / Q000235:genetics*; D014471:Umbilical Veins / Q000166:cytology
C086061:HOXB2 protein, human; D018398:Homeodomain Proteins; D020319:Oligodeoxyribonucleotides, Antisense; D014157:Transcription Factors