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    • 8. 发明申请
    • ANTIGENICITY OF INFECTIOUS PANCREATIC NECROSIS VIRUS VP2 SUB-VIRAL PARTICLES EXPRESSED IN YEAST
    • 感染性胰腺炎病毒VP2亚历山大小肠病毒的抗生素
    • WO2008140610A2
    • 2008-11-20
    • PCT/US2007/087942
    • 2007-12-18
    • ADVANCED BIONUTRITION CORPORATIONDHAR, Arun, K.BOWERS, Robert, M.ALLNUTT, Thomas, F.C.
    • DHAR, Arun, K.BOWERS, Robert, M.ALLNUTT, Thomas, F.C.
    • C12N15/40C12N7/04A61K39/12
    • A61K39/12A61K2039/51A61K2039/5258A61K2039/542A61K2039/552C07K14/005C12N7/00C12N2720/10022C12N2720/10023C12N2720/10034
    • Infectious pancreatic necrosis virus (IPNV), the etiologic agent of infectious pancreatic necrosis in salmonid fish, causes significant losses to the aquaculture industry. The gene for the viral capsid protein (VP2) was cloned into a yeast expression vector and expressed in Saccharomyces cerevisae. Expression of the capsid gene in yeast resulted in formation of approximately 20 nanometer sub-viral particles composed solely of VP2 protein. Anti-PNV antibodies were detected in rainbow trout vaccinated either by injection of purified VP2- subviral particles (rVP2-SVP) or by feeding recombinant yeast expressing rVP2-SVP. Challenge of rVP2-SVP immunized trout with a heterologous IPNV strain and subsequent viral load determination showed that both injection and orally vaccinated fish had lower DPNV loads than naive or sham-vaccinated fish. This study demonstrates the ability of rVP2-SVPs to induce a specific immune response and the ability of immunized fish to reduce the viral load after an experimentally induced IPNV infection. The invention is not limited to IPNV, and is applicable to other similar viruses for which SVPs can be made and administered to fish.
    • 传染性胰腺坏死病毒(IPNV)是鲑鱼感染性胰腺坏死的病原体,对水产养殖业造成重大损失。 将病毒衣壳蛋白(VP2)的基因克隆到酵母表达载体中并在酿酒酵母中表达。 酵母中衣壳基因的表达导致形成仅由VP2蛋白组成的约20纳米亚病毒颗粒。 通过注射纯化的VP2-亚病毒颗粒(rVP2-SVP)或通过饲喂表达rVP2-SVP的重组酵母,在虹鳟中检测到抗PNV抗体。 用异源IPNV株进行rVP2-SVP免疫鳟鱼的挑战,随后的病毒载量测定表明,注射和口服接种的鱼都比初始或假手术的鱼具有更低的DPNV负荷。 该研究证明rVP2-SVP诱导特异性免疫应答的能力以及免疫鱼在实验诱导的IPNV感染后降低病毒载量的能力。 本发明不限于IPNV,适用于可以制造和施用SVP的其他类似病毒。