[Expression of IL-6 in recombinant non-replicating vaccinia virus and studying its effects on immunogenicity].
BACKGROUND
To investigate expression of IL-6 in non?replicating vaccinia virus and its immune effects on recombinant virus.


METHODS
The recombinant non replicating vaccinia virus RVJ123 delta CK11 beta 75IL6 was constructed with non?replicating vaccinia virus vector pNEOCK11beta75IL6 and replicating vaccinia virus RVJ123. In animal model, immunization with the recombinant virus was carried out and its immune response was studied.


RESULTS
The recombinant virus could express IL-nd HBsAg simultaneously. Southern blot analysis demonstrated that the genes between vaccinia virus Hind? C and K fragments were deleted and IL-6 gene was integrated stably. Given intranasal inocula of the virus to immunize BALB/c mouse and New Zealand Rabbit, the elevated anti-HBsAg IgA and IgG antibody secreting cells in mouse lung lymphoid to vectors expressing IL-6 was at about two?fold higher level than those elicited by control virus at day 14 after immunization. Authors also could detect elevated anti-HBsAg IgA and IgG antibody conversion in mouse serum and lung fluid, rabbits serum, lung fluid, saliva, vagina and nasal washing samples.


CONCLUSIONS
IL-6 expressed by non-replicating recombinant vaccinia virus could enhance the induced?immune effects, it could serve as the effective adjuvant for recombinant vector vaccine.
Institute of Virology, Chinese Academy of Preventive Medicine, Beijing 100052, China.
Fei
F
Guo
Roujian
R
Lu
Zhaohui
Z
Sun
Hailun
H
Ma
Jun
J
Li
Yingmei
Y
Zhang
Dalong
D
Ma
Li
L
Ruan
D000276:Adjuvants, Immunologic; D000818:Animals; D002478:Cells, Cultured; D002642:Chick Embryo; D005260:Female; D005822:Genetic Vectors; D006801:Humans; D007070:Immunoglobulin A / Q000032:analysis; D007074:Immunoglobulin G / Q000032:analysis; D015850:Interleukin-6 / Q000096:biosynthesis* / Q000235:genetics / Q000276:immunology*; D008168:Lung / Q000276:immunology; D051379:Mice; D008807:Mice, Inbred BALB C; D011817:Rabbits; D011995:Recombination, Genetic; D014616:Vaccinia virus / Q000276:immunology / Q000378:metabolism* / Q000502:physiology; D014779:Virus Replication
D000276:Adjuvants, Immunologic; D007070:Immunoglobulin A; D007074:Immunoglobulin G; D015850:Interleukin-6