5'-tRNAHisGUG片段:一种首选的内源TLR7配体,具有逆序激活洞察力
Kiran Bharat Lokhande1, Ashutosh Singh2, Rajan Vyas2
1Department of Life Sciences, School of Natural Science, Shiv Nadar Institution of Eminence Deemed to Be University, Greater Noida, India; Computational Biophysics and CADD Group, Computational and Mathematical Biology Center, Translational Health Science and Technology Institute, Faridabad, India.
Biophysical journal
|May 7, 2025
概括
自然存在的tRNA片段,5'-HisGUG和5'-ValCAC/AAC是强大的托尔类受体7 (TLR7) 激活剂. 这些分子表现出强大的结合和形状灵活性,为治疗用途提供比合成TLR7激动剂更安全的替代品.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 结构生物学 结构生物学
背景情况:
- 收费类受体7 (TLR7) 对于先天性免疫和治疗点至关重要.
- 目前的合成TLR7激动剂引起毒性,需要更安全的替代品.
- 自然存在的RNA片段是潜在的TLR7激活剂.
研究的目的:
- 研究自然RNA碎片与TLR7.7的分子相互作用.
- 为了比较天然与合成TLR7激动剂的结合和激活.
- 从内源RNA中识别出新的,更安全的TLR7激活剂.
主要方法:
- 分子动力学 (MD) 模拟.分子动力学 (MD) 模拟.
- MM/GBSA 有约束力的自由能源分析.
- 在体外TLR7激活试验和细胞因子mRNA表达分析.
主要成果:
- 5'-HisGUG,5'-ValCAC/AAC和5'-HisGUG-Rev对TLR7表现出强烈的结合亲和力,超过了合成激动剂的结合亲和力.
- 与合成激动剂相比,内源性RNA配体表现出更大的形状变异性.
- 5'-HisGUG-Rev有效地激活了TLR7并增加了细胞因子mRNA表达.
结论:
- 像5'-HisGUG这样的自然tRNA片段是强大的,可能更安全的TLR7激活剂.
- 强大的结合亲和力和形状灵活性都对TLR7激活至关重要.
- 5'-HisGUG代表了调节先天免疫力的有希望的治疗候选者.
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