Scanning Chlamydia proteome for vaccine antigens

扫描衣原体蛋白质组寻找疫苗抗原

• 批准号: 7219023
• 负责人: LUIS M DE LA MAZA
• 金额: $ 30万
• 依托单位: IMMPORT THERAPEUTICS, INC.
• 依托单位国家: 美国
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-04-15 至 2009-03-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7219023
• 关键词: Abdominal Pain; Animals; Antibiotic Therapy; Antibiotics; Antibodies; Antigens; Area; Bacteria; Bioinformatics; Biology; Birth; Blindness; Body measure procedure; CD4 Positive T Lymphocytes; Caliber; Cell membrane; Cells; Child; Chlamydia; Chlamydia Infections; Chlamydia trachomatis; Chlamydophila pneumoniae; Chlamydophila psittaci; Chronic; Cicatrix; Clinical Trials; Cloning; Condition; Conjunctivitis; Country; Data; Development; Disease; Disease Outcome; Drug Formulations; Economics; Ectopic Pregnancy; Epithelial Cells; Eye Infections; Female; Genital system; Genomics; Goals; Gram-Negative Bacteria; Health; Hypersensitivity; Immune response; Immunization; Inbred BALB C Mice; Individual; Infection; Infertility; Laboratories; Lead; Length; Life; Localized; Lymphogranuloma Venereum; Measures; Mediating; Mouse Strains; Mus; Natural Immunity; Numbers; Open Reading Frames; Patients; Pelvic Inflammatory Disease; Phase; Phase II Clinical Trials; Play; Pneumonia; Populations at Risk; Prevalence; Preventive; Protein C; Protein Microchips; Proteins; Proteome; Proteomics; Protocols documentation; Reaction; Role; Route; Rupture; Sampling; Scanning; Screening procedure; Serological; Serum; Severities; Small Business Technology Transfer Research; Spottings; Subunit Vaccines; Systemic infection; Testing; Therapeutic; Time; Tissues; Trachoma; Vaccinated; Vaccine Antigen; Vaccines; Vagina; Week; Whole Organism; Woman; Work; base; genital infection; high throughput technology; mouse model; novel strategies; pathogen; plasmid DNA; prevent; respiratory; vaccine development; vaccine evaluation

DESCRIPTION (provided by applicant): Throughout the world Chlamydia trachomatis is the most common sexually transmitted bacterial pathogen. In areas with poor sanitary conditions C. trachomatis causes trachoma the most common cause of preventable blindness in the world. A majority of the genital C. trachomatis infections in women are asymptomatic. In addition, in symptomatic cases, unless therapy is implemented in a timely manner, long-term sequelae including, pelvic inflammatory disease, chronic abdominal pain, ectopic pregnancy and infertility, may develop. Children get infected at the time of birth and can develop conjunctivitis and pneumonia. Thus, the only practical approach to prevent these diseases is vaccinating the population at risk. Here we are going to utilize a high throughput approach to identify new potential candidate antigens for the formulation of a vaccine against C. trachomatis infections. The hypothesis we want to test is that antigens that can induce antibodies can protect against infection, and/or the long-term sequelae of a C. trachomatis infection, e.g., infertility. Using a new approach, developed by ImmPORT Therapeutics, Inc., we are going to clone and express all the proteins from C. trachomatis mouse pneumonitis (MoPn). The expressed proteins will be spotted onto a microarray chip. Three strains of mice will be vaccinated with live and UV-inactivated C. trachomatis MoPn using several mucosal and systemic routes of immunization. The animals will then be challenged intravaginally with C. trachomatis MoPn. To determine the severity and length of the genital infection vaginal cultures will be collected. Six weeks after the intravaginal challenge the mice will be euthanized and their genital tract examined for the presence of scar tissue and hydroxalpinx. Serum samples will be collected on a regular basis from the immunized and intravaginally challenged mice. These serum samples will be profiled based on the presence of antibodies to specific Chlamydia proteins using the microarray chip. Data will be analyzed to reveal any correlation between immune responses against specific subset of antigens and protection profile or disease state. Those proteins that are identified using the microarray chip, as potential vaccine antigens, will be subsequently tested in the phase II of the study for their ability to protect against a genital challenge. An efficacious vaccine against C. trachomatis will have a tremendous sanitary and economic impact throughout the world.

描述（由申请人提供）：沙眼衣原体是世界上最常见的性传播细菌病原体。在卫生条件差的地区C.沙眼是世界上可预防失明的最常见原因。生殖器C.妇女的沙眼感染是无症状的。此外，在有症状的病例中，除非及时进行治疗，否则可能会出现长期后遗症，包括盆腔炎、慢性腹痛、异位妊娠和不孕症。儿童在出生时受到感染，并可能发展为结膜炎和肺炎。因此，预防这些疾病的唯一切实可行的办法是为高危人群接种疫苗。在这里，我们将利用高通量的方法，以确定新的潜在的候选抗原的疫苗制剂对C。沙眼感染我们想要检验的假设是，能够诱导抗体的抗原可以防止感染，和/或C。沙眼感染，例如，不孕使用ImmPORT Therapeutics公司开发的一种新方法，我们将克隆并表达所有来自C.沙眼小鼠肺炎（MoPn）。将表达的蛋白质点样到微阵列芯片上。三种小鼠将接种活的和紫外线灭活的C。使用几种粘膜和全身免疫途径检测沙眼衣原体MoPn。然后用C.沙眼菌为了确定生殖器感染的严重程度和持续时间，将收集阴道培养物。阴道内激发后6周，对小鼠实施安乐死，并检查其生殖道是否存在瘢痕组织和羟醛松。将定期从免疫和阴道内攻毒小鼠中采集血清样品。将使用微阵列芯片基于特异性衣原体蛋白抗体的存在对这些血清样本进行分析。将分析数据以揭示针对特定抗原子集的免疫应答与保护特征或疾病状态之间的任何相关性。使用微阵列芯片鉴定的那些蛋白质作为潜在的疫苗抗原，随后将在研究的第二阶段测试其保护免受生殖器挑战的能力。一种有效的抗C.沙眼将对全世界的卫生和经济产生巨大影响。