Mehla Kusum, Ramana Jayashree
Department of Biotechnology and Bioinformatics, Jaypee University of Information Technology, Solan, PIN-173234, Himachal Pradesh, India.
Funct Integr Genomics. 2017 Jan;17(1):27-37. doi: 10.1007/s10142-016-0530-z. Epub 2016 Oct 24.
Campylobacter jejuni remains a major cause of human gastroenteritis with estimated annual incidence rate of 450 million infections worldwide. C. jejuni is a major burden to public health in both socioeconomically developing and industrialized nations. Virulence determinants involved in C. jejuni pathogenesis are multifactorial in nature and not yet fully understood. Despite the completion of the first C. jejuni genome project in 2000, there are currently no vaccines in the market against this pathogen. Traditional vaccinology approach is an arduous and time extensive task. Omics techniques coupled with sequencing data have engaged researcher's attention to reduce the time and resources applied in the process of vaccine development. Recently, there has been remarkable increase in development of in silico analysis tools for efficiently mining biological information obscured in the genome. In silico approaches have been crucial for combating infectious diseases by accelerating the pace of vaccine development. This study employed a range of bioinformatics approaches for proteome scale identification of peptide vaccine candidates. Whole proteome of C. jejuni was investigated for varied properties like antigenicity, allergenicity, major histocompatibility class (MHC)-peptide interaction, immune cell processivity, HLA distribution, conservancy, and population coverage. Predicted epitopes were further tested for binding in MHC groove using computational docking studies. The predicted epitopes were conserved; covered more than 80 % of the world population and were presented by MHC-I supertypes. We conclude by underscoring that the epitopes predicted are believed to expedite the development of successful vaccines to control or prevent C. jejuni infections albeit the results need to be experimentally validated.
空肠弯曲菌仍然是人类肠胃炎的主要病因,据估计全球每年有4.5亿例感染。在社会经济发展中国家和工业化国家,空肠弯曲菌都是公共卫生的重大负担。空肠弯曲菌致病的毒力决定因素具有多因素性质,尚未完全了解。尽管在2000年完成了首个空肠弯曲菌基因组计划,但目前市场上尚无针对这种病原体的疫苗。传统疫苗学方法是一项艰巨且耗时的任务。组学技术与测序数据相结合,引起了研究人员的关注,以减少疫苗开发过程中所花费的时间和资源。最近,用于有效挖掘隐藏在基因组中的生物学信息的计算机分析工具的开发有了显著增加。计算机方法对于通过加快疫苗开发速度来对抗传染病至关重要。本研究采用了一系列生物信息学方法,用于蛋白质组规模的肽疫苗候选物鉴定。对空肠弯曲菌的全蛋白质组进行了多种特性研究,如抗原性、致敏性、主要组织相容性复合体(MHC)-肽相互作用、免疫细胞加工性、HLA分布、保守性和人群覆盖率。使用计算对接研究进一步测试预测的表位在MHC槽中的结合情况。预测的表位具有保守性;覆盖了世界上80%以上的人口,并由MHC-I超型呈递。我们强调,尽管结果需要通过实验验证,但预测的表位据信将加快成功疫苗的开发,以控制或预防空肠弯曲菌感染。