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Related Concept Videos

Positive Regulator Molecules02:39

Positive Regulator Molecules

Mitotic cell division results in daughter cells that exactly resemble the parent cell. However, errors in the DNA replication or distribution of genetic material may lead to genetic mutations that may be passed down to every new cell formed from the resulting abnormal cell. Propagation of such mutant cells is restricted through checkpoint mechanisms present at different stages of the cell cycle. These checkpoints involve regulator molecules that either promote or demote cell cycle events.
Positive Regulator Molecules01:45

Positive Regulator Molecules

To consistently produce healthy cells, the cell cycle—the process that generates daughter cells—must be precisely regulated.
Notch Signaling Pathway03:14

Notch Signaling Pathway

The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
The Cell Cycle Control System01:28

The Cell Cycle Control System

The cell cycle regulation directs how a cell proceeds from one phase to the next and begins mitosis. The cell cycle control system includes intracellular regulatory molecules and external triggers. They provide "stop" or "advance" signals and operate at specific cell cycle stages termed checkpoints to ensure that a particular process is completed before the cell advances to the next phase.
Cyclins and cyclin-dependent kinases (Cdks) are the primary cell cycle regulators and function at the cell...
The Cell Cycle Control System02:11

The Cell Cycle Control System

The cell cycle is an organized set of events that leads the cell to divide into two daughter cells, each containing chromosomes identical to the parent cell. It is the cell cycle that leads to the formation of an entire organism from a single-cell zygote. Besides, cell division also functions in the renewal or repair of tissues in adult multicellular eukaryotes. For example, in the bone marrow, the stem cells divide to form new blood cells. Although essential for several functions, cell...
Negative Regulator Molecules01:23

Negative Regulator Molecules

Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.

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Related Experiment Video

Updated: Jun 8, 2026

Phenotypic Profiling of Human Stem Cell-Derived Midbrain Dopaminergic Neurons
09:21

Phenotypic Profiling of Human Stem Cell-Derived Midbrain Dopaminergic Neurons

Published on: July 7, 2023

Phenotypic checkpoints regulate neuronal development.

Yehezkel Ben-Ari1, Nicholas C Spitzer

  • 1Institut de Neurobiologie de la Méditerranée (INMED), Institut National de la Santé et de la Recherche Médicale (INSERM) Unité 901, Parc Scientifique de Luminy, Marseille CEDEX 09, France. ben-ari@inmed.univ-mrs.fr

Trends in Neurosciences
|September 25, 2010
PubMed
Summary
This summary is machine-generated.

Embryonic neuronal development relies on sequential gene expression and network activity. Failures in these developmental checkpoints may indicate presymptomatic neurological disorders.

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Last Updated: Jun 8, 2026

Phenotypic Profiling of Human Stem Cell-Derived Midbrain Dopaminergic Neurons
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Published on: July 7, 2023

Real-time Bioluminescence Imaging of Notch Signaling Dynamics during Murine Neurogenesis
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Published on: December 12, 2019

Rapid Detection of Neurodevelopmental Phenotypes in Human Neural Precursor Cells (NPCs)
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Rapid Detection of Neurodevelopmental Phenotypes in Human Neural Precursor Cells (NPCs)

Published on: March 2, 2018

Area of Science:

  • Neuroscience
  • Developmental Biology
  • Genetics

Background:

  • Nervous system development involves sequential gene expression and patterned network activity.
  • These processes are cell type- and developmental stage-dependent, influenced by neuronal and glial signaling.
  • The interaction between gene expression and network activity in development is not fully understood.

Purpose of the Study:

  • To explore the interplay between gene expression cascades and patterned network activity during neuronal development.
  • To investigate the concept of "phenotypic checkpoint signatures" in embryonic neuronal function.
  • To propose these checkpoints as potential presymptomatic indicators of neurological disorders.

Main Methods:

  • The study is primarily theoretical, synthesizing recent evidence and proposing a conceptual framework.
  • It integrates findings on transcription factor cascades, receptor/ion channel activity, and paracrine signaling.
  • The proposed model suggests functional feedback loops influencing gene expression during differentiation.

Main Results:

  • Embryonic neuronal functions may act as critical "phenotypic checkpoint signatures."
  • Neurons failing to meet these functional checkpoints may experience delayed or arrested development.
  • These checkpoints are proposed as a general feature of neuronal development.

Conclusions:

  • Disruptions in neuronal developmental checkpoints can serve as early, presymptomatic signatures of neurological disorders.
  • Understanding these checkpoints is crucial for diagnosing and potentially intervening in developmental neurological conditions.
  • This framework highlights the importance of functional milestones in ensuring proper nervous system formation.