Attenuation of dengue virus infection by adeno-associated virus-mediated siRNA delivery.
BACKGROUND: The need for safe and effective treatment of dengue virus (DEN), a class A agent that causes dengue hemorrhagic fever/dengue shock syndrome, has been a critical global priority. An effective vaccine for DEN is not yet available. In this study the possibility of attenuating DEN infection using adeno-associated virus (AAV)-encoded short interfering RNAs (siRNA) was examined in Vero cells and human dendritic cells (DCs). METHODS: A cassette encoding siRNA targeted to a 3' untranslated sequence common to all DEN serotypes was designed and tested for its ability to attenuate DEN infection by use of AAV delivery. RESULTS: Vero cells or DCs infected with AAV-siRNA showed a significant, dose-dependent reduction in DEN infection. Treatment of DCs with AAV-siRNA also decreased the DEN-induced apoptosis of DCs and did not induce significant inflammation. CONCLUSION: These results demonstrate that AAV-mediated siRNA delivery is capable of reducing DEN infection in cells and may be useful in decreasing DEN replication in humans.
Division of Allergy and Immunology-JMC Airway Disease Research Center, Department of Internal Medicine, University of South Florida; VA Hospital Tampa, FL, USA. smohapat@hsc.usf.edu
Weidong
W
Zhang
Rajeswari
R
Singam
Gary
G
Hellermann
Xiaoyuan
X
Kong
Homero San
HS
Juan
Richard F
RF
Lockey
Shuen-Ju
SJ
Wu
Kevin
K
Porter
Shyam S
SS
Mohapatra