Department of Pharmacology and Toxicology, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia.
Department of Pharmaceutical Chemistry, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia.
Front Immunol. 2024 Jun 10;15:1413893. doi: 10.3389/fimmu.2024.1413893. eCollection 2024.
INTRODUCTION: is a protozoan parasite that causes the tropical ailment known as Chagas disease, which has its origins in South America. Globally, it has a major impact on health and is transported by insect vector that serves as a parasite. Given the scarcity of vaccines and the limited treatment choices, we conducted a comprehensive investigation of core proteomics to explore a potential reverse vaccine candidate with high antigenicity. METHODS: To identify the immunodominant epitopes, T. cruzi core proteomics was initially explored. Consequently, the vaccine sequence was engineered to possess characteristics of non-allergenicity, antigenicity, immunogenicity, and enhanced solubility. After modeling the tertiary structure of the human TLR4 receptor, the binding affinities were assessed employing molecular docking and molecular dynamics simulations (MDS). RESULTS: Docking of the final vaccine design with TLR4 receptors revealed substantial hydrogen bond interactions. A server-based methodology for immunological simulation was developed to forecast the effectiveness against antibodies (IgM + IgG) and interferons (IFN-g). The MDS analysis revealed notable levels of structural compactness and binding stability with average RMSD of 5.03 Aring;, beta-factor 1.09e+5 Å, Rg is 44.7 Aring; and RMSF of 49.50 Aring;. This is followed by binding free energies calculation. The system stability was compromised by the complexes, as evidenced by their corresponding Gibbs free energies of -54.6 kcal/mol. DISCUSSION: Subtractive proteomics approach was applied to determine the antigenic regions of the T cruzi. Our study utilized computational techniques to identify B- and T-cell epitopes in the T. cruzi core proteome. In current study the developed vaccine candidate exhibits immunodominant features. Our findings suggest that formulating a vaccine targeting the causative agent of Chagas disease should be the initial step in its development.
简介:是一种原生动物寄生虫,会导致起源于南美洲的热带疾病恰加斯病。在全球范围内,它对健康有重大影响,并通过作为寄生虫的昆虫媒介传播。由于疫苗稀缺且治疗选择有限,我们对核心蛋白质组学进行了全面调查,以探索具有高抗原性的潜在反向疫苗候选物。
方法:为了鉴定免疫显性表位,首先探索了 T. cruzi 核心蛋白质组学。随后,对疫苗序列进行了工程设计,使其具有非变应原性、抗原性、免疫原性和增强的可溶性。在对人 TLR4 受体的三级结构进行建模后,通过分子对接和分子动力学模拟 (MDS) 评估了结合亲和力。
结果:将最终疫苗设计与 TLR4 受体对接显示出大量氢键相互作用。开发了一种基于服务器的免疫模拟方法,用于预测针对抗体 (IgM + IgG) 和干扰素 (IFN-g) 的效果。MDS 分析显示结构紧凑度和结合稳定性水平显著,平均 RMSD 为 5.03 Aring;,β因子 1.09e+5 Å,Rg 为 44.7 Aring;,RMSF 为 49.50 Aring;。随后计算结合自由能。复合物使系统稳定性受到损害,这一点从它们相应的 Gibbs 自由能为 -54.6 kcal/mol 得到证明。
讨论:采用消减蛋白质组学方法来确定 T cruzi 的抗原区域。我们的研究利用计算技术来鉴定 T. cruzi 核心蛋白质组中的 B 细胞和 T 细胞表位。在当前的研究中,所开发的疫苗候选物表现出免疫显性特征。我们的研究结果表明,针对恰加斯病病原体制定疫苗应该是其开发的第一步。
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