[Preparation and identification of rabbit polyclonal antibodies against vacuolar proton pyrophosphatase type I of Toxoplasma gondii].
OBJECTIVE
To prepare and characterize rabbit polyclonal antibodies against Toxoplasma gondii vacuolar proton pyrophosphatase type I (TgVP1).


RESULTS
Two synthesized peptides TgVP1-1 and TgVP1-2 as the haptens were conjugated with KLH to immunize rabbits. Indirect ELISA showed that the titers of rabbit anti-TgVP1-1 polyclonal antibody and rabbit anti-TgVP1-2 polyclonal antibody reached 1:128 000. Western blotting results revealed that both purified polyclonal antibodies could specifically bind to a purified 85 kD T. gondii protein predicted as TgVP1. The protein detected by these two polyclonal antibodies was distributed in the cytoplasm of T. gondii tachyzoite, and this distribution pattern was consistent with that of acidocalcisome.


CONCLUSIONS
The peptide-based method of antibody generation is efficient and the obtained TgVP1 polyclonal antibodies possess a high specificity to facilitate further study of T. gondii acidocalcisome and the diagnosis of toxoplasmosis.
Institute of Antibody Engineering, School of Biotechnology, Southern Medical University, Guangzhou 510515, China. E-mail: tongchengbi890326@163.com.
Chengbi
C
Tong
Wenbo
W
Hao
Shuhong
S
Luo
Bin
B
Xiao
Shasha
S
Cheng
Xiaoqing
X
Liao
Di
D
Pan
D000818:Animals; D000906:Antibodies / Q000276:immunology*; D015153:Blotting, Western; D004797:Enzyme-Linked Immunosorbent Assay; D015800:Protozoan Proteins / Q000276:immunology*; D011755:Pyrophosphatases / Q000276:immunology*; D011817:Rabbits; D014122:Toxoplasma / Q000201:enzymology*
D000906:Antibodies; D015800:Protozoan Proteins; D011755:Pyrophosphatases