Comparison of antigenic proteins from Lactococcus garvieae KG- and KG+ strains that are recognized by olive flounder (Paralichthys olivaceus) antibodies.
Lactococcus garvieae is an important etiological agent of lactococcosis in various fish species including olive flounder (Paralichthys olivaceus). In this study, proteomic and immunoproteomic analyses were employed to compare the antigenic profiles of strains KG9408, MS93003, and NSS9310 strains of L. garvieae. Proteomic analysis using two-dimensional gel electrophoresis (2-DE) revealed differences in five protein spots among the different L. garvieae strains. In immunoproteomic analysis, there was a significant difference in the 2-DE immunoblot profiles of the L. garvieae strains using sera collected from fish surviving infection with either L. garvieae strains KG9408 or NSS9310. These sera reacted with 8 and 7 unique antigenic protein spots, respectively. Heat shock protein (HSP) 70 and DNA-directed RNA polymerase were among the specific antigens recognized by the anti-NSS9310 serum. In addition, the anti-NSS9310 and anti-KG9408 olive flounder sera reacted with 25 common antigenic protein spots of all the L. garvieae strains, which included elongation factor (EF)-Tu, arginine deiminase (AD), inosine-5'-monophosphate dehydrogenase (IMPD), glyceraldehyde-3-phosphate dehydrogenase (GAPDH), phosphomannomutase (PMM), L-lactate dehydrogenase (L-LDH), 6-phosphofructokinase and UDP-galactose 4-epimerase (UDP-galactose). Based on the present results, the 8 antigens recognized by the anti-KG9408 serum and the 25 common antigens recognized by both sera may serve as potential markers for developing an effective vaccine against this bacterium.
Shin
Gee-Wook
GW
Laboratory of Aquatic Animal Diseases, Research Institute of Life Science, College of Veterinary Medicine, Gyeongsang National University, Jinju, Gyeongnam 660-701, Republic of Korea.
Nho
Seong-Won
SW
Park
Seong-Bin
SB
Jang
Ho-Bin
HB
Cha
In-Seok
IS
Ha
Mi-Ae
MA
Kim
Young-Rim
YR
Dalvi
Rishikesh S
RS
Joh
Seong-Joon
SJ
Jung
Tae-Sung
TS
D000818:Animals; D000942:Antigens, Bacterial / Q000276:immunology*; D001426:Bacterial Proteins / Q000276:immunology; D015180:Electrophoresis, Gel, Two-Dimensional; D005393:Fish Diseases / Q000276:immunology / Q000382:microbiology; D005432:Flounder / Q000276:immunology* / Q000382:microbiology; D015151:Immunoblotting; D017045:Lactococcus / Q000276:immunology* / Q000472:pathogenicity; D020543:Proteome
D000942:Antigens, Bacterial; D001426:Bacterial Proteins; D020543:Proteome