[Effects of delta1 gene transfection on biological behaviors of rat dendritic cells].
OBJECTIVE
To explore the effects of Delta1 gene on rat bone marrow-derived dendritic cells (DCs).


METHODS
pcDNA3.1/delta1 plasmid was transfected into Rat DCs with lipofectamine gene transfection method. The expression of activation markers(Iad, CD80 and CD86) were examined by flow cytometry, the release of cytokines IL-12 were examined by ELISA and the stimulatory capacity of the resulting DCs in vitro were examined by mixed lymphocyte reaction(MLR).


RESULTS
The biological character of DCs in experimental group, empty vector group and control group were examined by electron microscope, flow cytometry and cell growth rate counting. There were no differences of cell cycles, ultrastructure and cell growth rate among these three group cells (P>0.05). It stated that delta1 gene had no effect on the growth of DCs. Even at the stimulation of LPS, In the delta1 transfected DCs, we observed no significant effects on the expression of activation markers(Iad, CD80 or CD86). The release of IL-12 in DCs/delta1 was reduced compared with control DCs(P<0.05). The levels of IFN-gamma and IL-2 of the DCs/delta1 were significantly lower than those of the DCs(P<0.05), and the levels of IL-4 and IL-10 were significantly higher than that in control DCs(P<0.05).


CONCLUSIONS
Our data demonstrates that the delta1 gene transfection does not interfere with the differentiation or maturation of DCs, but reduce the ability to stimulating T cells, and the mechanism may be related to the decrease of Th1 /Th2 ratio by impairing the production of DCs-derived IL-12.
Zheng
Kai
K
Organ Transplanatiot Institute, Fuzhou General Hospital, Nanjing Military Command, Fuzhou 350025, China.
Tan
Jian-Ming
JM
Wu
Wei-Zhen
WZ
Yang
Shun-Liang
SL
D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects / Q000502:physiology*; D002454:Cell Differentiation / Q000187:drug effects* / Q000502:physiology; D049109:Cell Proliferation / Q000187:drug effects; D003713:Dendritic Cells / Q000166:cytology / Q000378:metabolism* / Q000502:physiology; D005434:Flow Cytometry; D007108:Immune Tolerance / Q000276:immunology*; D016753:Interleukin-10 / Q000378:metabolism; D018664:Interleukin-12 / Q000378:metabolism; D007376:Interleukin-2 / Q000378:metabolism; D015847:Interleukin-4 / Q000378:metabolism; D008070:Lipopolysaccharides / Q000494:pharmacology; D016377:Organ Transplantation / Q000379:methods; D051381:Rats; D017208:Rats, Wistar; D058408:Th1-Th2 Balance / Q000187:drug effects; D014162:Transfection / Q000379:methods
D007376:Interleukin-2; D008070:Lipopolysaccharides; D016753:Interleukin-10; D018664:Interleukin-12; D015847:Interleukin-4