科学期刊《自然》(Nature)刊登出一项新研究,美国加州大学洛杉矶分校(UCLA)的科学家原本想再生逐渐萎缩的胸腺,却意外发现衰老或许是可逆的。受试者在服药后不仅恢复免疫系统的活力,连表观“生物钟”(epigenetic clock)都平均逆转2.5年。
据《福斯新闻》报道,受试者服下包含一种生长激素及两种糖尿病药物的药品,主要用来测试生长激素能不能让胸腺组织再生,但该激素同时也会导致糖尿病,所以需要搭配糖尿病药物。
UCLA研究员霍瓦斯表示,原本预计生物钟可以放慢,但没想过还能达到逆转的程度,如今就像走进了未来世界。霍瓦斯用4种方法测量每位受试者的生物钟,结果都观察到明显的逆转。
但科学家也强调,这只是初步的研究结果,因为只有9名受试者,也没有任何对照组,如果将来能够再次证实,那对于医疗保健及高龄化社会可能有巨大的影响。
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