EPISODE · Aug 27, 2026 · 22 MIN
1500-精氨酸介导的密码子翻译调控与免疫增强
from 聊聊Sci
这项研究揭示了精氨酸供应如何通过密码子依赖性翻译机制调控MHC-I类分子的表达，进而影响机体免疫力。研究指出，在癌症和病毒感染（如新冠和流感）过程中，细胞外精氨酸的匮乏会导致核糖体停滞，减少抗原呈递并引发免疫逃逸。科研人员发现，通过膳食补充精氨酸或基因手段提高其水平，能有效增强抗肿瘤及抗病毒的免疫反应。实验证明，这种调控作用具有密码子偏好性，特别是AGG密码子对精氨酸水平的变化表现出较强的耐受力。该发现不仅阐明了氨基酸波动影响基因表达的新机制，还为通过营养干预辅助治疗癌症和传染病提供了科学依据。References:Wu Q, Seydlitz L M, Iakimov V, et al. Dietary arginine drives codon-dependent MHC class I translation and improves immunity in colon tumorigenesis and respiratory viral infection[J]. Cell, 2026.前往小宇宙评论区与主播互动
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1500-精氨酸介导的密码子翻译调控与免疫增强
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