A chitinase-like protein fromSarcoptes scabieias a candidate anti-mite vaccine
that contributes to immune protection in rabbits
Nengxing Shen, Haojie Zhang, Yongjun Ren, Ran He, Jing Xu, Chunyan Li,
Weimin Lai, Xiaobin Gu,Yue Xie, Xuerong Peng and Guangyou Yang
Abstract
Background: Scabies is caused bySarcoptes scabieiburrowing into the stratum corneum of the host's skin and is detrimental to the health of humans and animals. Vaccines are an attractive alternative to replace the acaricides currently used in their control.
Methods: In the present study, theS. scabieichitinase-like protein 5 (SsCLP5) was characterized and recombinant SsCLP5 (rSsCLP5) was evaluated as a candidate vaccine protein for anti-mite protection in rabbits. The expression, characterization and immunolocalization of SsCLP5 were examined. Vaccination experiments were performed on three test groups (n= 12 per group) immunized with purified rSsCLP5. Control groups (n= 12 per group) were immunized with PBS, QuilA saponin or empty vector protein. After challenge, the inflammatory reaction and skin lesions were graded and rSsCLP5 indirect ELISA was used to detect antibody IgG levels in serum samples at the time of vaccination and post-challenge.
Results: The results showed that rSsCLP5 had high immunoreactivity and immunogenicity. InS. scabiei, SsCLP5 had a wide distribution in the chewing mouthpart, legs and exoskeleton, especially the outer layer of the exoskeleton. Vaccination with rSsCLP5 resulted in 74.3% (26/35) of rabbits showing no detectable lesions after challenge withS. scabiei.
Conclusion: Our data demonstrate that rSsCLP5 is a promising candidate for a recombinant protein-based vaccine againstS. scabiei. This study also provides a method for studying scabies vaccine using rabbit as an animal model and a basis for screening more effective candidate proteins.
copyright:© The Author(s).
Parasites & Vectors (2018) 11:599. DOI: 10.1186/s13071-018-3184-y
Read Full Text: https://doi.org/10.1186/s13071-018-3184-y
