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    • 2. 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
    • US20100092521A1
    • 2010-04-15
    • US12519991
    • 2007-12-18
    • Arun K. DharRobert M. BowersF.C. Thomas Allnutt
    • Arun K. DharRobert M. BowersF.C. Thomas Allnutt
    • A61K39/00C12N1/19C12P21/00A61P31/12
    • 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-IPNV 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 IPNV 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)或通过加入表达rVP2-SVP的重组酵母,在虹鳟中检测到抗IPNV抗体。 用异源IPNV株进行rVP2-SVP免疫鳟鱼的挑战,随后进行病毒载量测定,结果表明注射和口服接种的鱼类比初始或假手术的鱼具有较低的IPNV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。
    • 4. 发明申请
    • CRUSTACEAN EXPRESSION VECTOR
    • 表达式表达向量
    • US20110269225A1
    • 2011-11-03
    • US13176026
    • 2011-07-05
    • ARUN K. DHARF.C. THOMAS ALLNUTT
    • ARUN K. DHARF.C. THOMAS ALLNUTT
    • C12N15/85
    • C12N15/85A01K2227/70A01K2267/0393C12N2799/021C12N2800/90
    • Methods and constructs for genetic manipulation of one or more of shrimp, shellfish, mollusks, and fish are disclosed. The nucleic acid construct includes a promoter and an internal ribosome entry site of an insect picomavirus, such as a cricket paralysis-like picomavirus. One or more open reading frames can be operably associated with one or both of the promoter and the internal ribosome entry site, and one or more proteins or protein subunits can be expressed upon introduction of the construct into a host cell, such as into a shrimp. Method for producing immortalized crustacean cell lines using enhancer elements derived from shrimp and/or shrimp viruses are also described.
    • 公开了一种或多种虾,贝类,软体动物和鱼的遗传操作的方法和构造。 核酸构建体包括一种启动子和一种诸如板球麻痹状皮莫瓦病毒之类的皮肤微病毒病毒的内部核糖体进入位点。 一个或多个开放阅读框可以与启动子和内部核糖体进入位点中的一个或两个可操作地相关联,并且一个或多个蛋白质或蛋白质亚基可以在将构建体引入宿主细胞时表达,例如进入虾 。 还描述了使用源自虾和/或虾病毒的增强子元件生产永生化甲壳类细胞系的方法。
    • 5. 发明申请
    • NON-INVASIVE DETECTION OF FISH VIRUSES BY REAL-TIME PCR
    • US20090181363A1
    • 2009-07-16
    • US12158096
    • 2006-12-21
    • Arun K. Dhar
    • Arun K. Dhar
    • C12Q1/70C12Q1/68
    • C12Q1/686C12Q2561/113
    • A real-time assay coupled with a non-invasive tissue sampling was developed for the detection and quantification of fish viruses. As a proof of principles, data were presented for the detection and quantification of infectious hypodermal necrosis virus (IHNV) in trout. The primers were designed for IHNV nucleocapsid (N), and surface glycoprotein (G) genes, and trout &bgr;-actin and elongation factor-l&agr; (EF-I &agr;) were used as internal control for the assay. The reaction conditions for the real-time RT-PCR were optimized using cDNA derived from IHNV-infected Epithelioma papulosum cyprinid (EPC) cells. Using both N- and G-gene primers, IHNV was successfully detected in liver, kidney, spleen, adipose tissue and pectoral fin samples of laboratory-challenged and wild samples. The dissociation curves with a single melting peak at expected temperature (85° C. for the N-gene and 86.5° C. for the G-gene) confirmed the specificity of the N- and G-gene amplicons. The IHNV N- and the G-gene expression levels in different tissues of laboratory challenged samples were in the order of spleen, liver, kidney, adipose tissue and pectoral fin, however in the field-collected samples the order of gene expression was liver, kidney, pectoral fin, adipose tissue, and spleen. The N- and G-gene expressions in spleen were found to be dramatically lower in the field-collected samples compared to the laboratory-challenged samples indicating a potential difference in the IHNV replication in the laboratory as opposed to field conditions. The real-time PCR assay was found to be rapid, highly sensitive, and reproducible. Based upon the ability to detect the virus in pectoral fins a non-invasive detection method for IHNV and other fish viruses is developed. Such a non-invasive tissue sampling coupled with real-time PCR assay is very valuable for large-scale virus screening of fish in aquaculture facilities as well as for epidemiological studies.
    • 6. 发明授权
    • Antigenicity of infectious pancreatic necrosis virus VP2 sub-viral particles expressed in yeast
    • 感染性胰腺坏死病毒VP2亚病毒颗粒在酵母中表达的抗原性
    • US08221767B2
    • 2012-07-17
    • US12519991
    • 2007-12-18
    • Arun K. DharRobert M. BowersF. C. Thomas Allnutt
    • Arun K. DharRobert M. BowersF. C. Thomas Allnutt
    • A61K38/00C12P19/34
    • 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-IPNV 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 IPNV 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)或通过加入表达rVP2-SVP的重组酵母,在虹鳟中检测到抗IPNV抗体。 用异源IPNV毒株对rVP2-SVP免疫的鳟鱼进行挑战,随后的病毒载量测定显示注射和口服接种的鱼类比幼稚或假手术的鱼具有较低的IPNV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。