Abstract:
:As a cytokine adjuvant, granulocyte-macrophage colony-stimulating factor (GM-CSF) has been demonstrated to play central roles in the enhancement of the immune response and protection elicited by experimental vaccines. However, in our previous work, the co-administration of GM-CSF produced untoward effects on the immune response induced by a Japanese encephalitis virus DNA vaccine candidate. This study aimed to elucidate the adjuvant roles of GM-CSF in several Flaviviridae virus DNA vaccine candidates. Our results showed that the effects of GM-CSF were diverse: co-inoculated GM-CSF caused significant suppression to the dengue virus type 1 and type 2 prM-E DNA vaccinations and influenced protective efficiency against virus challenge. In contrast, GM-CSF showed little effect or an enhancement on the immune response elicited by hepatitis C virus C or E1 DNA vaccine candidates. Notably, these effects of GM-CSF were highly durable. Our results suggested that the adjuvant roles of the GM-CSF plasmid were complex and diverse, ranging from enhancement to suppression, depending on the immunogen of Flaviviridae virus DNA vaccine candidates. Therefore, the application of GM-CSF as a vaccine adjuvant or a therapeutic agent should be evaluated carefully.
journal_name
Immunol Lettjournal_title
Immunology lettersauthors
Chen H,Gao N,Wu J,Zheng X,Li J,Fan D,An Jdoi
10.1016/j.imlet.2014.08.005subject
Has Abstractpub_date
2014-11-01 00:00:00pages
140-8issue
1 Pt Aeissn
0165-2478issn
1879-0542pii
S0165-2478(14)00175-8journal_volume
162pub_type
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