Recombinant Yellow Fever 17D-Lassa Vaccine

重组黄热病 17D 拉沙疫苗

• 批准号: 7409716
• 负责人: Igor S. Lukashevich
• 金额: $ 53.54万
• 依托单位: UNIVERSITY OF MARYLAND BALTIMORE
• 依托单位国家: 美国
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-05-01 至 2010-04-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7409716
• 关键词: Active Immunization; Affect; Africa; Animals; Antibodies; Antigens; Area; Attenuated; Attenuated Vaccines; Biological Warfare; Cavia; Central Africa; Complementary DNA; Curiosities; Dengue; Development; Disease; Encephalitis; Experimental Models; Flavivirus; Generations; Genes; Glycoproteins; Goals; Health Policy; Human; Immune response; Immunization; Incidence; Infection; Influenza; Lassa Fever; Length; Life; Macaca mulatta; Medical; NP protein; Nucleoproteins; Numbers; Oncogenes; Plague; Plasmodium yoelii; Population; Public Health; Recombinants; Relative (related person); Risk; Rodent Model; Safety; Social Change; T-Lymphocyte; T-Lymphocyte Epitopes; Testing; United States Food and Drug Administration; Vaccines; Vaccinia; Validation; Vesicular stomatitis Indiana virus; Viral; Viral Hemorrhagic Fevers; Viral Proteins; Virus; West Nile virus; World War II; Yellow Fever; Yellow fever virus; base; biodefense; burden of illness; immunogenicity; nonhuman primate; pathogen; preclinical study; response; social; subcutaneous; vaccine development; vector; vector vaccine

DESCRIPTION (provided by applicant): Yellow Fever (YF) and Lassa Fever (LF) are two viral hemorrhagic fevers (VHFs) endemic for West and Central Africa. Among causative agents of VHFs, Lassa (LAS) and YF viruses affect the largest number of people in Africa. In endemic areas the "at risk" LAS virus seronegative population may be as high as 59 million, with an annual incidence of illness of 3 million, fatalities up to 67 thousand, and up to 3 million re- infections. The sizeable disease burden and the possibility that LAS virus can be used as an agent of biological warfare make a strong case for vaccine development. There is no vaccine for LF. In contrast, attenuated YF17D, the most successful vaccine developed to date, is widely used to control YF. However, ecological and social changes, ineffective public health policy and insufficient vaccine coverage resulted in a resurgence of YF during last 15 years. Recently the YF17D vaccine has been successfully used as a vector for live vaccines against flaviviruses and as a vaccine vector for flavivirus-unrelated B and T cell epitopes. We use a full-length infectious cDNA clone of the YF17D as a vector of LAS virus genes, GPC and NP, encoding major antigens, glycoproteins and nucleoprotein, respectively. We will test the hypothesis that YF17D/LAS recombinants will effectively express LAS virus major antigens and induce protective immune responses in experimental animals. Strain 13 guinea pigs and rhesus macaques are the best experimental models for LF to comply with the FDA "Two Animal Rule" for development of biodefense vaccines. Our goal is to assess the immunogenicity and efficacy of YF17D/LAS recombinants in a rodent model before pre-clinical trials in non-human primates. Our specific aims are: 1. Generation and validation of recombinant YF17D/LAS viruses; test the hypothesis that the YF/LAS recombinants will be replication-competent and express LAS GP and NP proteins. 2. Test the hypothesis that the vaccine will induce antigen-specific responses against major LAS virus proteins. 3. Efficacy, determine whether YF17D/LAS recombinants will effectively protect strain 13 guinea pigs against LAS virus challenge. Our long-term goal is to develop a live YF17D/LAS bivalent vaccine to control YF and LF in Africa.

描述（由申请人提供）：黄热病（YF）和拉沙热（LF）是西非和中非流行的两种病毒性出血热（VHF）。在VHF的病原体中，拉沙（LAS）和YF病毒影响非洲最多的人。在流行地区，“处于危险中”的LAS病毒血清阴性人口可能高达5900万，每年发病率为300万，死亡人数高达6.7万，再感染人数高达300万。相当大的疾病负担和LAS病毒可用作生物战剂的可能性为疫苗开发提供了强有力的理由。没有LF疫苗。相比之下，迄今为止开发的最成功的疫苗减毒YF 17 D被广泛用于控制YF。然而，生态和社会的变化，无效的公共卫生政策和疫苗覆盖率不足，导致在过去的15年里，YF死灰复燃。最近，YF 17 D疫苗已成功地用作抗黄病毒的活疫苗的载体和用作黄病毒无关的B和T细胞表位的疫苗载体。我们使用全长感染性cDNA克隆的YF 17 D作为载体的LAS病毒基因，GPC和NP，编码主要抗原，糖蛋白和核蛋白，分别。我们将检验YF 17 D/LAS重组体将有效表达LAS病毒主要抗原并在实验动物中诱导保护性免疫应答的假设。13号品系豚鼠和恒河猴是LF符合FDA“双动物规则”开发生物防御疫苗的最佳实验模型。我们的目标是在非人灵长类动物中进行临床前试验之前，在啮齿动物模型中评估YF 17 D/LAS重组体的免疫原性和功效。我们的具体目标是：1.重组YF 17 D/LAS病毒的生成和验证;检验YF/LAS重组体将具有复制能力并表达LAS GP和NP蛋白的假设。2.检验疫苗将诱导针对主要LAS病毒蛋白的抗原特异性应答的假设。3.效力，确定YF 17 D/LAS重组体是否能有效保护品系13豚鼠抵抗LAS病毒攻击。我们的长期目标是开发YF 17 D/LAS双价活疫苗，以控制非洲的YF和LF。