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Related Concept Videos

Anchoring Junctions01:03

Anchoring Junctions

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Anchoring junctions are multiprotein complexes that help cells connect to other cells and the extracellular matrix. Anchoring junctions are present on the lateral and basal surfaces of cells, providing strong and flexible connections. Focal adhesions are often formed due to cell interactions with the ECM substrata, which initiate signal transduction via kinase cascades and other mechanisms. Together, they provide stability and tissue integrity. There are three types of anchoring junctions:...
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Diencephalon: Hypothalamus and Coordination01:23

Diencephalon: Hypothalamus and Coordination

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The hypothalamus is a small yet highly complex and essential brain region that plays a crucial role in regulating various bodily functions. Anatomically, it is located at the base of the brain, just above the brainstem and below the thalamus, forming part of the limbic system.
The hypothalamus interacts with other brain regions, including the pituitary gland, through a direct physical connection called the hypothalamic-pituitary axis. The hypothalamus receives somatic and visceral inputs and...
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Brainstem01:19

Brainstem

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The brainstem, located inferior to the brain and superior to the spinal cord, serves as a bridge between the cerebrum and the spinal cord. It plays a vital role in relaying information and controlling critical life functions. It comprises three primary regions: the midbrain, pons, and medulla oblongata.
The Midbrain
The midbrain is located beneath the diencephalon and connects the cerebrum with the lower parts of the brain. The cerebral peduncles are prominent midbrain structures that house the...
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Gap Junctions01:27

Gap Junctions

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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...
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Reflex Activity01:08

Reflex Activity

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A reflex activity is an automatic, involuntary response to specific stimuli. It is a part of our survival mechanism, designed to protect us from potential harm. For example, when a bright light suddenly shines into our eyes, we instinctively close them or look away. This is a simple reflex activity orchestrated by the nervous system without conscious thought or effort.
A reflex exam is a diagnostic procedure performed by a healthcare professional to evaluate the functionality of a patient's...
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The Nucleolus02:55

The Nucleolus

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The nucleolus is the most prominent substructure of the nucleus. When it was first discovered, it was considered to be an isolated organelle that forms fibrils and granules. In 1931, the relationship between the nucleolus and chromosomes was first described by Heitz. He observed that the appearance and size of nucleolus varies depending on the stage of the cell cycle. He also noticed constricted regions on different chromosomes clustered together at definite cell cycle stages. These regions,...
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Mitotic reactivation and transcriptional bursting govern transcriptional noise in the early Drosophila embryo.

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Related Experiment Video

Updated: Jul 9, 2025

Methodology for Establishing a Community-Wide Life Laboratory for Capturing Unobtrusive and Continuous Remote Activity and Health Data
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Methodology for Establishing a Community-Wide Life Laboratory for Capturing Unobtrusive and Continuous Remote Activity and Health Data

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A hub of activity.

Virginia L Pimmett1, Mounia Lagha1

  • 1Institut de Génétique Moléculaire de Montpellier, University of Montpellier, CNRS UMR 5535, Paris, France.

Elife
|November 29, 2023
PubMed
Summary

Imaging reveals that transcriptional hubs in Notch signaling are complex and dynamic. These findings offer new insights into gene regulation.

Area of Science:

  • Cellular biology
  • Molecular biology
  • Genetics

Background:

  • Notch signaling is a crucial pathway in cell-to-cell communication.
  • Transcriptional hubs are key regulatory sites for gene expression.

Discussion:

  • The study visualizes the dynamic behavior of transcriptional hubs in real-time.
  • These hubs show complex interactions crucial for Notch pathway regulation.

Key Insights:

  • Imaging experiments demonstrate the intricate and fluid nature of transcriptional hubs.
  • These hubs play a dynamic role in modulating Notch signaling outcomes.

Outlook:

  • Further research can explore the precise molecular mechanisms within these hubs.
  • Understanding these dynamics may lead to new therapeutic strategies targeting Notch signaling.
Keywords:
D. melanogasterDrosophilachromosomesdevelopmental biologygene expressionmastermindnotchquantitative imagingtranscription factorstranscription hubtranscription kinetics

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