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相关概念视频

Determination01:51

Determination

During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In contrast, determination...
Zygotic Development And Stem Cell Formation01:10

Zygotic Development And Stem Cell Formation

The development of all multicellular organisms starts with the fusion of haploid cells called sperm and egg to form a diploid zygote. A zygote is a totipotent cell that can develop into a complete organism. The zygote undergoes cell division or cleavage to form an 8-cell mass. Until this stage, the cells are spherical, loosely attached, and remain totipotent. Totipotent cells are capable of developing both the embryonic and the extraembryonic tissues. However, as they continue to divide, they...

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相关实验视频

Updated: Jun 24, 2026

In situ Protocol for Butterfly Pupal Wings Using Riboprobes
06:19

In situ Protocol for Butterfly Pupal Wings Using Riboprobes

Published on: May 28, 2007

11.1K

蝙蝠翅膀发育的单细胞表达造型.

Xue Lyu1, Jing Bai1,2, Ji-Bin Jiang1,2

  • 1State Key Laboratory of Genetic Evolution & Animal Models, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China.

Nature communications
|July 18, 2025
PubMed
概括
此摘要是机器生成的。

这项研究使用单细胞测序揭示了蝙蝠翅膀发育的关键细胞和分子机制. 它确定了特定的细胞群和信号通路,这些通路对于形成独特的哺乳动物飞行结构至关重要.

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Laser Microdissection Applied to Gene Expression Profiling of Subset of Cells from the Drosophila Wing Disc
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A Rapid and Efficient Method to Dissect Pupal Wings of Drosophila Suitable for Immunodetections or PCR Assays
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相关实验视频

Last Updated: Jun 24, 2026

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Laser Microdissection Applied to Gene Expression Profiling of Subset of Cells from the Drosophila Wing Disc
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A Rapid and Efficient Method to Dissect Pupal Wings of Drosophila Suitable for Immunodetections or PCR Assays
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科学领域:

  • 发展生物学 发展生物学
  • 哺乳动物进化 哺乳动物进化
  • 基因组学就是基因组学.

背景情况:

  • 蝙蝠是唯一能够真正飞行的哺乳动物,它们的翅膀由延长的手指和膜组成.
  • 蝙蝠翅膀发育的细胞和分子基础尚未得到充分理解.
  • 了解蝙蝠翅膀的发育提供了对飞行的进化适应性的见解.

研究的目的:

  • 为了创建一个全面的单细胞地图,开发蝙蝠的四肢.
  • 确定关键的细胞群和参与蝙蝠翅膀形成的分子途径.
  • 阐明驱动哺乳动物飞行进化的机制.

主要方法:

  • 来自蝙蝠 (Rhinolophus sinicus) 肢体的约39,000个细胞的单细胞转录组测序在卡内基阶段16,18和20中.
  • 在蝙蝠前肢发育过程中识别和描述不同的细胞群.
  • 单细胞和大量RNA测序数据的综合分析.

主要成果:

  • 确定了16种不同的细胞种群,包括蝙蝠前肢中的新型PDGFD+介质原体.
  • 蝙蝠前肢的发育显示长时间的冠状体生成和延迟的骨质生成,导致更多的冠状细胞和更少的骨质母细胞.
  • 痕信号激活和WNT/β-catenin信号抑制对于蝙蝠前肢发育至关重要.

结论:

  • 这项研究提供了一个详细的单细胞地图,描绘了蝙蝠肢体的发育过程.
  • 特定的原始细胞和信号通路 (Notch,WNT/β-catenin) 对于蝙蝠翅膀的发育至关重要.
  • 这些发现提升了我们对哺乳动物飞行进化的分子基础的理解.