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抗衰老研究通过喂食高糖饮食来延长蠕虫的寿命_我的网站

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一 | 南洋理工大学的细胞生物学家和研究负责人Guillaume Thibault副教授说：“衰老是各种人类病症的一个关键风险因素，从糖尿病等代谢性疾病到癌症和神经退行性疾病。

Screenshots of the short drama videos featuring AI characters sharing near-identical faces Almond-shaped eyes, petal-like lips and a permanent soft-focus glow on the cheekbones, the faces of AI-generated short-drama characters can be almost too perfect.
After binge-watching several AI short dramas on Chinese short-video platforms, viewers may find themselves wondering whether they have accidentally stumbled into the same show again.
The phenomenon of AI characters sharing near-identical faces has become so noticeable that Hongguo Short Drama, a micro-drama platform operated by ByteDance, has moved to rein it in.
Hongguo recently issued a notice calling for creators of AI dramas to avoid using highly similar facial appearances across different productions and characters, warning against a "one-size-fits-all" approach to character design.
The platform also said it would launch a special campaign targeting frequently used AI faces, homogenized content and unauthorized materials.
"Men, women, young and old are all using the same face. It's starting to give me the uncanny-valley feeling," one viewer commented on the social media Sina Weibo.
Another complained that AI characters seemed to make exactly the same facial expressions whenever they spoke, while others said watching several dramas in succession with nearly identical female leads gave them an unsettling sense of "something human, but not quite human."
Screenshots of the short drama videos featuring AI characters sharing near-identical faces

Screenshots of the short drama videos featuring AI characters sharing near-identical faces A comparison of several AI short dramas, including Twilight in Later Years, Mother-in-Law's Awakening and Shedding the Burden to Find Myself, shows their middle-aged female protagonists feature similar straight eyebrows and large double eyelids, while their smiles and crying expressions can also appear strikingly alike.
The platform said creators should conduct self-checks and promptly modify or replace problematic content. The upcoming campaign will specifically target "high-frequency AI faces," homogenized character designs and violations involving source materials.
A commentary published by the People's Daily newspaper in early August noted that AI micro-dramas had accounted for more than 95 percent of newly released micro-dramas over the previous six months, while their total viewing volume still lagged far behind that of productions featuring human performers.
The commentary argued that mass-produced, visually similar AI content could actually strengthen audiences' appetite for more authentic storytelling and distinctive characters.
Platforms are therefore beginning to add more checks before AI productions reach audiences.
On August 3, Douyin Group's Short Drama Creator Center launched a pre-screening tool for AI drama copyright holders and directors. With it, eligible creators can upload promotional and production materials as well as completed works for preliminary checks on potential infringement before release.
Screenshots of the short drama videos featuring AI characters sharing near-identical faces

Screenshots of the short drama videos featuring AI characters sharing near-identical faces
。从公共卫生的角度来看，确定支撑衰老过程的细胞途径可以使我们更接近开发新的治疗策略来治疗与年龄相关的疾病。”该研究将目光投向了当细胞内未折叠的蛋白质积累时发生的应激反应。这可能是由过量的葡萄糖或自然老化引起的，因为我们负责生成健康蛋白质的细胞机器正在退化。该机制被称为"未折叠蛋白反应"，它通过压力传感器监测这些事情，并在需要时启动行动，清除未折叠蛋白以维持细胞的平衡。该研究的作者试图探索未折叠蛋白反应在衰老中发挥的作用，利用蠕虫秀丽隐杆线虫（Caenorhabditis elegans，C. elegans）进行分析。这些蠕虫是衰老研究中受欢迎的模型，因为它们与人类有着相似的基因组和许多细胞通路，但寿命只有三或四个星期，这使得它们的寿命变化相对容易测量。一组蠕虫在生殖期后的年龄（在它们不再有生育能力的第5天）被喂食高葡萄糖饮食，而一组处于成年期（一天大）的年轻蠕虫被喂食同样的饮食。年长的蠕虫几乎活了两倍，活了24天，而年轻的蠕虫只活了13天。一组正常饮食的蠕虫的对照组活了20天。与这些对照组动物相比，使用高脂肪饮食的老年蠕虫更加敏捷，并具有更多的能量储存细胞，研究人员说这表明它们的衰老更加健康。当科学家们给蠕虫喂食含糖的食物时，他们密切监测与未折叠蛋白反应有关的压力传感器的活动，并发现与年长的蠕虫相比，年轻的蠕虫中的一个传感器高度活跃。名为IRE1的科学家们随后删除了编码这一压力传感器的基因，实际上是关闭了压力反应的细胞途径。

二 | 有趣的是，这导致年轻的蠕虫活了25天，令人印象深刻，尽管它们吃的是高糖食物，几乎是有IRE1压力传感器的年轻蠕虫的两倍。这表明，在蠕虫的一生中，应激反应的持续激活有效地缩短了它们的寿命。

三 | Thibault说：“我们相信，喂给老龄蠕虫的高葡萄糖饮食刺激了它们原本迟缓的未折叠蛋白反应，并开启了某些细胞通路，不仅解决了过量葡萄糖造成的压力，而且还解决了其他与衰老有关的压力，恢复了细胞的稳定性。

四 | 与此相反，由于IRE1过度激活，接受高葡萄糖饮食的年轻蠕虫在细胞中引发了未解决的压力。这种长时间的激活导致细胞反而启动了细胞死亡。”作者说，这是第一个将这种特殊的压力反应与衰老联系起来的研究。要正确理解起作用的机制，包括该机制如何影响其他细胞的过程，还需要更多的工作。但是，安全操纵这种应激反应的能力可能导致延长寿命和减缓细胞老化的治疗方法。