関連する実験動画
Updated: May 10, 2026
09:30
Mouse in Utero Electroporation: Controlled Spatiotemporal Gene Transfection
Published on: August 15, 2011
44.6K
マウスの発達におけるプリインプランテーション段階におけるギャップ・ジャンクション通信と圧縮
S Lee1, N B Gilula, A E Warner
1Department of Anatomy and Embryology, University College London, England.
Cell
|December 4, 1987
まとめ
ギャップジャンクション抗体は,初期のマウス胚における通信をブロックし,染料の移転と電気結合を防ぐ. これは,胚の凝縮を維持するために,ギャップジャンクション通信が不可欠であることを示唆しています.
科学分野:
- 発達生物学 発達生物学とは
- 細胞生物学 細胞生物学
- 胚学 胚学について
背景:
- ギャップ・ジャンクションは細胞間通信を促進し,胚の発達に不可欠です.
- 圧縮は早期哺乳類の胚形成の重要なプロセスであり,細胞の形状の変化と粘着の増大を含む.
研究 の 目的:
- 圧縮された8細胞マウスジゴトにおけるギャップ・ジャンクション通信の役割を調査する.
- ギャップジャンクション抗体が初期のマウス胚における染料伝達と電気結合を阻害できるかどうかを決定する.
主な方法:
- マウスの卵胞にルシファーの黄色い染料とギャップジャンクション抗体を同時に注入する.
- 染料の移転とブラストメア間の電気結合の測定.
- 抗体注射後のジゴットの発達と細胞形態の観察.
主要な成果:
- ギャップ・ジャンクション抗体は,8細胞マウスジゴトにおける染料伝達 (86%) と電気結合を著しく抑制した.
- 抗体注入された細胞は挤出されたが,残った細胞は正常に分裂した.
- 2細胞段階での早期注射は,8細胞段階への正常な分裂を可能にしましたが,細胞は圧縮されていませんでした.
結論:
- ギャップ・ジャンクション通信は,初期のマウスジゴトの特定の抗体によって効果的に抑制されます.
- ギャップ・ジャンクション・コミュニケーションは,ジゴットの凝縮を維持する上で重要な役割を果たします.
関連する概念動画
01:27Gap Junctions
The cytoplasm of adjacent animal cells can exchange small molecules, ions, and secondary messengers via the communication channels which form the gap junctions. These junctions comprise a few hundred to thousands of molecular channels, each made of two halves, called the connexon hemichannel. A connexon is a hexamer of six transmembrane connexin proteins, which assemble radially, thus forming a pore or channel in the center. One connexon hemichannel docks with a corresponding connexon on the...
01:23Propagation of Action Potentials
The propagation of an action potential refers to the process by which a nerve impulse, or "action potential," travels along a neuron.
Neurons (nerve cells) have a resting membrane potential, with a slightly negative charge inside compared to outside. This is maintained by ion channels, such as sodium (Na+) and potassium (K+) channels, which control the flow of ions. When a stimulus, like a touch or a signal from another neuron, triggers the neuron, sodium channels open, allowing sodium ions to...
Neurons (nerve cells) have a resting membrane potential, with a slightly negative charge inside compared to outside. This is maintained by ion channels, such as sodium (Na+) and potassium (K+) channels, which control the flow of ions. When a stimulus, like a touch or a signal from another neuron, triggers the neuron, sodium channels open, allowing sodium ions to...
01:32Postsynaptic Potential (PSP)
Postsynaptic potential (PSP) refers to a change in the electrical potential of a neuron when neurotransmitters released by presynaptic neurons bind to postsynaptic receptors. This potential can either be excitatory, leading to depolarization and ultimately action potential generation, or inhibitory, leading to hyperpolarization and suppression of the postsynaptic neuron.
There are two types of receptors: ionotropic and metabotropic.
The ionotropic receptor is the membrane protein that has an...
There are two types of receptors: ionotropic and metabotropic.
The ionotropic receptor is the membrane protein that has an...
01:20Downsampling
When considering a sampled sequence with zero values between sampling instants, one can replace it by taking every N-th value of the sequence. At these integer multiples of N, the original and sampled sequences coincide. This process, known as decimation, involves extracting every N-th sample from a sequence, thereby creating a more efficient sequence.
The Fourier transform of the decimated sequence reveals a combination of scaled and shifted versions of the original spectrum. This...
The Fourier transform of the decimated sequence reveals a combination of scaled and shifted versions of the original spectrum. This...
01:22Upsampling
Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral replicas at intervals dictated by the new Nyquist frequency. To refine this zero-inserted sequence, it is passed through a lowpass filter with a cutoff...
01:26Cellular Adaptation II: Hypertrophy
Hypertrophy is the increase in the size of individual cells, resulting in the enlargement of a tissue or organ. Unlike hyperplasia, which involves an increase in cell number, hypertrophy is characterized by an increase in cell volume. This process often occurs in response to higher functional demand or hormonal stimulation, leading to the production of more structural proteins and organelles, thereby enhancing the cells' work capacity.There are two primary types of hypertrophy: physiological...