相关实验视频
Updated: Feb 10, 2026

06:07
Studying Large Amplitude Oscillatory Shear Response of Soft Materials
Published on: April 25, 2019
13.7K
MYRF驱动异常miRNAs和LIN-42,并放大用于阶段过渡的振荡程序
bioRxiv : the preprint server for biology
|February 9, 2026
概括
跨膜转录因子MYRF对于C. elegans的幼虫发育至关重要,调节阶段过渡. MYRF振荡驱动关键的微RNA和基因网络,确保正确的进展并防止发育停滞.
科学领域:
- 发展生物学 发展生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 在C. elegans的幼虫发育涉及离散的阶段,但控制阶段过渡的精确机制尚未完全理解.
- 了解这些转变对于破译发育时间和基因调节至关重要.
研究的目的:
- 确定C. elegans.幼虫阶段过渡的关键调节者.
- 阐明跨膜转录因子MYRF在幼虫发育过程中的时间调节中的作用.
主要方法:
- 在C. elegans.中利用了基因操纵 (功能丧失,急性衰竭).
- 分析了MYRF裂变,核积累和振荡模式.
- 研究了MYRF对微RNAs (lin-4,mir-48/241/84,let-7) 和基因网络 (nhr-23) 的直接激活.
- 检查了MYRF和lin-42/Period之间的反循环.
主要成果:
- 确定了MYRF作为一个主要的时调节器,对幼虫的进展至关重要.
- 证明MYRF裂变和核积累在幼虫阶段之间发生振荡.
- 显示的MYRF直接激活关键的异常性微RNA并放大振荡基因网络.
- 发现MYRF功能丧失导致发育停止和关键发育事件停滞.
- 揭示了MYRF振荡先于并诱导lin-42/Period激活,从而加剧MYRF振荡.
结论:
- 在C. elegans中,MYRF是幼虫阶段过渡的核心驱动因素.
- MYRF将微RNA介导的时间身份与基于放大器的基因网络逻辑结合起来.
- 这种机制确保执行特定阶段和阶段的发展计划,保持发展进展.
相关概念视频
M-Cdk Drives Transition Into Mitosis
6.6K
Checkpoints throughout the cell cycle serve as safeguards and gatekeepers, allowing the cell cycle to progress in favorable conditions and slow or halt it in problematic ones. This regulation is known as the cell cycle control system.
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
6.6K
Phase Transitions
23.3K
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
23.3K
Operational Amplifiers
2.0K
The operational amplifier, often referred to as an op-amp, is a multifaceted building block of a circuit. This electronic component functions like a voltage-controlled voltage source and can also be used to create a voltage- or current-controlled current source. The design of an operational amplifier enables it to execute mathematical operations when external components like resistors and capacitors are linked to its terminals. An op-amp has the capacity to sum signals, amplify a signal,...
2.0K
MOSFET Amplifiers
528
The MOSFET, when operating in its active region, functions as a voltage-controlled current source. In this region, the gate-to-source voltage controls the drain current. This principle underlies the operation of the transconductance MOSFET amplifier. The output current is directed through a load resistor to convert this amplifier into a voltage amplifier. The output voltage is then obtained by subtracting the voltage drop across the load resistance from the supply voltage. This process results...
528
BJT Amplifiers
1.0K
Bipolar Junction Transistors (BJTs) are pivotal components in amplifier circuits, functioning as voltage-controlled current sources in their active region. This characteristic allows them to efficiently control the collector current through variations in the base-emitter voltage. Essentially, BJTs amplify power due to their ability to take a weak input signal and output a much stronger signal.
In BJT amplifier configurations, particularly in common-emitter setups, the transistor's role...
In BJT amplifier configurations, particularly in common-emitter setups, the transistor's role...
1.0K
Properties of Transition Metals
30.0K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
30.0K

