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789
科学家发现杀手T细胞能有效对抗所有常见流感病毒。
(坎贝拉19日综合电)澳洲科学家周一表示,他们找到可以对抗所有已知流感病毒的免疫细胞,此发现被誉为“非凡突破”,为制造万能单剂流感疫苗带来希望。
根据世界卫生组织,主要为季节性的流感疫情每年造成数十万人死亡。由于其突变病毒株,疫苗配方必须定期更新,目前仅能提供有限保护。
澳洲研究人员表示,于世界一半以上人口体内发现的细胞毒性T细胞(cytotoxic T cell,又称杀手T细胞),在实验中证明可有效对抗所有常见流感病毒。这代表杀手T细胞可能被用于开发一种无须每年更换的万能流感疫苗,甚至对先天没有杀手T细胞的人也有效果。
墨尔本大学多尔第研究所研究人员库萨寇斯说,“流感病毒不断变异,以避免被我们的免疫系统识别,而且病毒种类繁多,几乎不可能预测并接种导致下一次流感大流行的病毒株。”
T细胞是白血球的一种,在人体内扫描异常和感染,对人体对抗大量入侵细菌和病毒非常重要。“杀手”T细胞的独特之处在于可以直接锁定并杀死其他受感染的细胞。
库萨寇斯和同事们使用质谱法-一种根据质量分离分子的扫描技术,识别所有流感病毒株共有的病毒部份,并发现杀手T细胞可以有效对抗A型、B型和C型流感病毒变异。
研究团队已为他们的发现申请专利,研究人员表示,希望能够开发一种万能疫苗“以减少全球大流行和季节性流感的冲击”。
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