Pleurocidin Peptide Enhances Grouper Anti-Vibrio harveyi Immunity Elicited by Poly(lactide-co-glycolide)-Encapsulated Recombinant Glyceraldehyde-3-phosphate Dehydrogenase

被引：11

作者：

Chuang, Shu-Chun ^{[1
]}

Huang, Wan-Ling ^{[2
]}

Kau, Sau-Wei ^{[2
]}

Yang, Yun-Pei ^{[2
]}

Yang, Chung-Da ^{[2
]}

机构：

[1] Kaohsiung Med Univ, Coll Med, Dept Physiol, Kaohsiung 807, Taiwan

[2] Natl Pingtung Univ Sci & Technol, Grad Inst Anim Vaccine Technol, 1,Shuefu Rd, Pingtung 912, Taiwan

来源：

VACCINES | 2014年 / 2卷 / 02期

关键词：

Vibrio harveyi (V. harveyi); pleurocidin (PLE); glyceraldehyde-3-phosphate dehydrogenase (GAPDH); poly(lactide-co-glycolide) (PLG);

D O I：

10.3390/vaccines2020380

中图分类号：

R392 [医学免疫学]; Q939.91 [免疫学];

学科分类号：

100102 ;

摘要：

Outer membrane proteins, such as glyceraldehyde-3-phosphate dehydrogenase (GAPDH), are considered immunodominant antigens for eliciting protective immunity against Vibrio harveyi, the main etiological agent of vibriosis in fish. Cationic antimicrobial peptides (AMPs), such as pleurocidin (PLE), play important roles in activating and recruiting immune cells, thereby contributing to subsequent innate and adaptive immune responses. In the present study, we aimed to use PLE peptide as a potent adjuvant to improve the immunogenicity of V. harveyi recombinant GAPDH (rGAPDH). In order to prepare a controlled-release vaccine, PLE peptide and rGAPDH protein were simultaneously encapsulated into polymeric microparticles made from the biodegradable poly(lactide-co-glycolide) (PLG) polymer. The resulting PLG-encapsulated PLE plus rGAPDH (PLG-PLE/rGAPDH) microparticles, 3.21-6.27 mu m in diameter, showed 72%-83% entrapment efficiency and durably released both PLE and rGAPDH for a long 30-day period. Following peritoneal immunization in grouper (Epinephelus coioides), PLG-PLE/rGAPDH microparticles resulted in significantly higher (p < 0.05, nested design) long-lasting GAPDH-specific immunity (serum titers and lymphocyte proliferation) than PLG-encapsulated rGAPDH (PLG-rGAPDH) microparticles. After an experimental challenge of V. harveyi, PLG-PLE/rGAPDH microparticles conferred a high survival rate (85%), which was significantly higher (p < 0.05, chi-square test) than that induced by PLG-rGAPDH microparticles (67%). In conclusion, PLE peptide exhibits an efficacious adjuvant effect to elicit not only improved immunity, but also enhanced protection against V. harveyi in grouper induced by rGAPDH protein encapsulated in PLG microparticles.

引用

页码：380 / 396

页数：17

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