Abstract:
BACKGROUND:Although plasmid DNA encoding an antigen from pathogens or tumor cells has been widely studied as vaccine, the use of plasmid vector (without insert) as therapeutic agent requires further investigation. RESULTS:Here, we showed that plasmid DNA (pcDNA3) at low doses inhibits the production of IL-6 and TNF-α by lipopolysaccharide (LPS)-stimulated macrophage cell line J774. These findings led us to evaluate whether plasmid DNA could act as an anti-inflammatory agent in a Wistar rat endotoxemia model. Rats injected simultaneously with 1.5 mg/kg of LPS and 10 or 20 μg of plasmid DNA had a remarkable attenuation of mean arterial blood pressure (MAP) drop at 2 hours after treatment when compared with rats injected with LPS only. The beneficial effect of the plasmid DNA on MAP was associated with decreased expression of IL-6 in liver and increased concentration of plasma vasopressin (AVP), a known vasoconstrictor that has been investigated in hemorrhagic shock management. No difference was observed in relation to nitric oxide (NO) production. CONCLUSION:Our results demonstrate for the first time that plasmid DNA vector at low doses presents anti-inflammatory property and constitutes a novel approach with therapeutic potential in inflammatory diseases.
journal_name
BMC Immunoljournal_title
BMC immunologyauthors
Malardo T,Batalhão ME,Panunto-Castelo A,Almeida LP,Padilha E,Fontoura IC,Silva CL,Carnio EC,Coelho-Castelo AAdoi
10.1186/1471-2172-13-59subject
Has Abstractpub_date
2012-11-08 00:00:00pages
59issn
1471-2172pii
1471-2172-13-59journal_volume
13pub_type
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