EPISODE · Aug 28, 2026 · 19 MIN
1503-肠道肌肉的性别差异与生殖可塑性控制肠道大小
from 聊聊Sci
这个研究揭示了肠道肌肉在调节成年器官大小和功能中的主动作用。通过对果蝇和小鼠的实验，研究发现肠道肌肉并非被动受体，而是会根据性别与生殖状态发生显著的结构重塑。在雌性果蝇中，交配会触发肌节伸长，这种由保幼激素信号下调驱动的变化会降低肠道蠕动速度。这种肌肉重塑不仅改变了器官的物理尺寸，还通过延缓食物运输来增强繁殖力，确保营养吸收能够满足生育需求。此外，研究证实了性别决定因子直接控制肌原纤维的粗细，证明了肌肉内在的遗传特性对器官整体形态具有决定性影响。References:Mineo A, Blackie L, Milona A, et al. The sex and reproductive plasticity of intestinal muscles instruct gut size[J]. Cell, 2026.前往小宇宙评论区与主播互动
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1503-肠道肌肉的性别差异与生殖可塑性控制肠道大小
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