Scientists discover how African sleeping sickness parasite hides from the immune system
科學家發現非洲睡眠病寄生蟲如何躲避免疫系統
Researchers have made a major breakthrough regarding the Trypanosoma brucei, the pathogen behind African sleeping sickness.
研究人員針對非洲昏睡病（sleeping sickness）的病原體——布氏錐蟲（Trypanosoma brucei），取得了重大突破。
For decades, scientists wondered how the parasite produces a massive protective coat of Variant Surface Glycoprotein (VSG)[noun|protein] while keeping essential helper proteins at low levels.
數十年來，科學家一直困惑於這種寄生蟲（parasite）是如何在保持必要的輔助蛋白處於低水平的同時，製造出大量保護性的變異表面糖蛋白（VSG）外殼。
A study published in Nature Microbiology identifies a protein called ESB2 that acts as a molecular shredder.
發表於《自然-微生物學》（Nature Microbiology）的一項研究確認了一種稱為ESB2的蛋白質，其作用如同分子碎紙機。
Located inside the parasite, ESB2 performs real-time genetic editing by destroying helper gene transcripts while keeping the VSG instructions intact.
ESB2位於寄生蟲體內，透過破壞輔助基因轉錄本（transcripts），同時保持VSG指令完好無損來執行即時基因編輯。
African sleeping sickness, transmitted by the tsetse fly, is a dangerous tropical disease that can invade the central nervous system.
由采采蠅（tsetse fly）傳播的非洲昏睡病是一種危險的熱帶疾病，會侵襲中樞神經系統。
By mastering antigenic variation, the parasite constantly switches its surface coat to evade the host's immune system.
透過掌握抗原變異（antigenic variation），寄生蟲會不斷切換其表面外殼，以規避宿主的免疫系統。
Uncovering this biological vulnerability offers a promising new direction for developing treatments against this severe illness, which remains a significant threat to health in sub-Saharan Africa.
揭開這種生物弱點，為治療這種嚴重疾病提供了充滿前景的新方向，該病至今仍是撒哈拉以南非洲地區健康的重大威脅。
