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Nature子刊:李敏/胡霁/骆艳丽团队发现,鼻腔中的金黄色葡萄球菌通过降解性激素,促进抑郁
生物世界· 2025-09-24 00:00
Core Viewpoint - The article discusses the relationship between nasal microbiota, specifically Staphylococcus aureus, and depressive behavior, highlighting the role of sex hormone degradation in this process [4][5][11]. Group 1: Research Findings - A study published in Nature Microbiology indicates that nasal Staphylococcus aureus can promote depressive behavior in mice by degrading sex hormones [4][5]. - The enzyme 17β-hydroxysteroid dehydrogenase expressed by Staphylococcus aureus degrades testosterone and estradiol in mice, leading to decreased levels of dopamine and serotonin in the brain, which induces depressive-like behavior [5][11]. - Analysis of nasal microbiota shows a positive correlation between the abundance of Staphylococcus aureus and depression scores in both depressed patients and healthy controls [9]. Group 2: Implications - The findings suggest a significant link between nasal microbiota and brain function, particularly in the context of neuropsychiatric disorders, which has been under-researched [8]. - The study provides new insights into the nose-brain axis, indicating that nasal colonization by certain bacteria may influence mental health through hormonal pathways [11].
当一名世界冠军,被允许吞下禁药
Hu Xiu· 2025-06-05 02:35
Group 1 - James Magnussen, an Australian swimmer known as "the Missile," gained fame at a young age, winning multiple championships and medals before retiring in 2019 [1][2][3] - Recently, he became the first signed athlete for the Enhanced Games, a controversial event that allows the use of performance-enhancing drugs [4][5] - The Enhanced Games aims to challenge traditional sports norms and is set to take place in Las Vegas in June 2024, covering sports where drugs significantly impact performance [5][6] Group 2 - The Enhanced Games was publicly announced by Australian businessman Aron D'Souza, who envisions it as a means to push human limits through science and technology [12][13] - D'Souza, a well-educated entrepreneur with a background in technology and finance, is a key figure in promoting the idea that sports can be enhanced through drugs [16][19] - The involvement of political figures, such as Donald Trump Jr., further intertwines the event with governmental interests, suggesting a blend of business and politics [20][21] Group 3 - The Enhanced Games challenges the International Olympic Committee (IOC) by accusing it of corruption and mismanagement of funds, claiming that athletes receive minimal financial support compared to the IOC's earnings [38][41] - D'Souza's assertions about the IOC's greed resonate with ongoing criticisms of the organization, especially in light of recent financial struggles and declining viewership for the Olympics [49][50] - The Enhanced Games promotes a narrative of athlete autonomy, arguing that competitors should have the right to choose how they enhance their performance, despite the inherent contradictions in its policies [35][36] Group 4 - The Enhanced Games offers substantial financial incentives, including $50,000 for winning and $100,000 for breaking world records, which may attract athletes facing financial pressures [55][61] - The event's marketing strategy includes a direct sales approach for performance-enhancing drugs, making them accessible to the general public for a fee [56][59] - The rise of the Enhanced Games reflects a broader crisis in traditional sports governance, as the IOC and WADA face increasing scrutiny and loss of credibility [59][60]