降低发烧可能是对抗疟疾的关键

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尽管发烧令人不适,但它是身体对抗感染的方式。 然而,就疟疾而言,这种防御机制可能会适得其反。 根据本周在美国国家科学院院刊上在线发表的一份报告,发烧使感染疟疾的红细胞粘附在血管壁上,这可能导致死亡。

虽然疟疾的特征是发烧,但对寄生红细胞粘附性的研究始终在正常人体温度下进行。 因此,曼谷玛希隆大学的尼古拉斯·J·怀特和他的同事决定研究在加热到疟疾病例中常见的温度的血液中感染细胞的行为。 该团队使用从 12 名患有急性疟疾感染的患者身上获得的样本发现,寄生血液细胞的粘性在加热后增加。 相比之下,在正常体温下,血细胞没有表现出这种粘附性。 其他发现表明,热诱导的粘性可能来自红细胞表面蛋白 PfEMP-1 水平的增加。

研究结果为疟疾患者在发烧阶段病情经常显著恶化的原因提供了新的见解。 它们还表明,与一种流行的学派观点相反,该学派认为退烧会减缓身体清除寄生虫的能力,但实际上降低发烧可能阻碍疾病进展并增强抗疟药物阻断寄生虫发育的能力。

Kate Wong is an award-winning science writer and senior editor at 大众科学 focused on evolution, ecology, anthropology, archaeology, paleontology and animal behavior. She is fascinated by human origins, which she has covered for more than 25 years. Recently she has become obsessed with birds. Her reporting has taken her to caves in France and Croatia that Neandertals once called home, to the shores of Kenya's Lake Turkana in search of the oldest stone tools in the world, to Madagascar on an expedition to unearth ancient mammals and dinosaurs, to the icy waters of Antarctica, where humpback whales feast on krill, and on a "Big Day" race around the state of Connecticut to find as many bird species as possible in 24 hours. Kate is co-author, with Donald Johanson, of Lucy's Legacy: The Quest for Human Origins. She holds a bachelor of science degree in biological anthropology and zoology from the University of Michigan. Follow Wong on X (formerly Twitter) @katewong

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