加州大学欧文分校的研究团队发现，寿命可达400年的格陵兰鲨鱼在其极长的生命周期中，眼睛几乎不会出现衰老迹象 1。研究人员检查了2020年至2024年间从格陵兰岛采集的鲨鱼眼球组织，其中包括来自200岁以上个体的样本 1。分析结果表明，这些鲨鱼的视网膜中没有发现细胞死亡的证据 1。
研究团队发现，视紫质蛋白在这些鲨鱼的视网膜中保持活跃，使其能够适应低光环境下对蓝光的检测 1。科学家推测，高效的DNA修复机制可能是使格陵兰鲨鱼眼睛在数个世纪内保持功能的关键因素 1。由加州大学欧文分校生理学与生物物理学副教授Dorota Skowronska-Krawczyk主导的这项研究成果已发表在《Nature Communications》期刊2026年第17卷第1期 1。这一发现可能为人类视力衰老保护提供新的科学线索 1。
Researchers at the University of California, Irvine have discovered that the Greenland shark's eyes display virtually no signs of aging throughout the animal's extraordinarily long lifespan of up to 400 years, making it the longest-lived known vertebrate 1. A team led by Dorota Skowronska-Krawczyk, an associate professor of physiology and biophysics at UC Irvine, examined eye tissue samples collected from sharks in Greenland between 2020 and 2024, including specimens over 200 years old 1. The analysis revealed no evidence of cell death in the retina, suggesting that DNA repair mechanisms enable the shark's eyes to maintain function across centuries 1.
The research, published in Nature Communications Volume 17, Issue 1 in August 2026, found that rhodopsin—a light-sensitive protein crucial for vision—remains active in the Greenland shark's retina and is adapted for detecting blue light 1. These findings may offer new insights into protecting human vision from age-related decline, opening potential avenues for understanding how certain organisms resist the cellular deterioration that typically accompanies aging 1.
评论
还没有评论，欢迎留下第一条。