Tan Caixia, Xiao Yuanyuan, Liu Ting, Chen Siyao, Zhou Juan, Zhang Sisi, Hu Yiran, Wu Anhua, Li Chunhui
Infection Control Center, Xiangya Hospital, Central South University, Changsha, Hunan Province, 410008, China.
National Clinical Research Center for Geriatric Disorders (XiangYa Hospital), Changsha, Hunan Province, 410008, China.
Synth Syst Biotechnol. 2024 May 18;9(4):667-683. doi: 10.1016/j.synbio.2024.05.008. eCollection 2024 Dec.
(), as the major pathogen of diarrhea in healthcare settings, has become increasingly prevalent within community populations, resulting in significant morbidity and mortality. However, the therapeutic options for infection (CDI) remain limited, and as of now, no authorized vaccine is available to combat this disease. Therefore, the development of a novel vaccine against is of paramount importance. In our study, the complete proteome sequences of 118 strains of were downloaded and analyzed. We found four antigenic proteins that were highly conserved and can be used for epitope identification. We designed two vaccines, WLcd1 and WLcd2, that contain the ideal T-cell and B-cell epitopes, adjuvants, and the pan HLA DR-binding epitope (PADRE) sequences. The biophysical and chemical assessments of these vaccine candidates indicated that they were suitable for immunogenic applications. Molecular docking analyses revealed that WLcd1 bonded with higher affinity to Toll-like receptors (TLRs) than WLcd2. Furthermore, molecular dynamics (MD) simulations, performed using Gmx_MMPBSA v1.56, confirmed the binding stability of WLcd1 with TLR2 and TLR4. The preliminary findings suggested that this multi-epitope vaccine could be a promising candidate for protection against CDI; however, experimental studies are necessary to confirm these predictions.
作为医疗机构腹泻的主要病原体,已在社区人群中日益普遍,导致显著的发病率和死亡率。然而,艰难梭菌感染(CDI)的治疗选择仍然有限,截至目前,尚无授权疫苗可用于对抗这种疾病。因此,开发一种针对艰难梭菌的新型疫苗至关重要。在我们的研究中,下载并分析了118株艰难梭菌的完整蛋白质组序列。我们发现了四种高度保守的抗原蛋白,可用于表位鉴定。我们设计了两种疫苗,WLcd1和WLcd2,它们包含理想的T细胞和B细胞表位、佐剂以及泛HLA DR结合表位(PADRE)序列。对这些候选疫苗的生物物理和化学评估表明它们适用于免疫原性应用。分子对接分析显示,WLcd1与Toll样受体(TLRs)的结合亲和力高于WLcd2。此外,使用Gmx_MMPBSA v1.56进行的分子动力学(MD)模拟证实了WLcd1与TLR2和TLR4的结合稳定性。初步研究结果表明,这种多表位疫苗可能是预防CDI的有前景的候选疫苗;然而,需要进行实验研究来证实这些预测。
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