Dual Smad Inhibition
Dual Smad Inhibition - Related Videos
02:40
Detecting SMAD Pathway Activation Using Dual Adenovirus Transduction
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2026
Source: Chen, H., et al. Live Cell Imaging of the TGF-β/Smad3 Signaling Pathway In Vitro and In Vivo Using an Adenovirus Reporter System. J. Vis. Exp. (2018).This video demonstrates a method to study SMAD pathway activation in breast cancer cells using dual adenoviral infection. One virus delivers a constitutively expressed GFP gene, while the other carries an RFP reporter under a SMAD-sensitive promoter. Upon TGF-beta stimulation, SMAD proteins are activated, forming a complex that induces RFP...
00:46
Feedback Inhibition
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2019
Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell! Since enzymes help control the rate of reactions, their activity is regulated so that appropriate amounts of starting materials, intermediate metabolites, and products are maintained in the cell. Excessive build-up or depletion of...
07:33
In vivo Dual Substrate Bioluminescent Imaging
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Cited by 20 •
2011
Herein we describe the methods to construct, visualize, and quantify the bioluminescent reactions of both firefly and renilla luciferase enzymes expressed in metastatic breast cancer cells during their growth and metastasis in vivo.
01:30
Enzyme Inhibition
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2025
Inhibitors are molecules that reduce enzyme activity by binding to the enzyme. In a normally functioning cell, enzymes are regulated by a variety of inhibitors. Drugs and other toxins can also inhibit enzymes. Some inhibitors bind to the enzyme’s active site, while others inhibit enzymatic activity by binding to other sites on the protein structure. Competitive inhibitors occupy the active site of enzymes, making them unable to accommodate the substrate. However, sufficiently high...
02:29
Measuring Immune-Induced Inhibition of Seedling Growth
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2025
This video demonstrates the seedling growth inhibition assay in the Arabidopsis thaliana plant. The impact of increased concentration of immune peptide elicitor on seedling growth is determined.
FAQs
Blocking these two signaling branches reduces activity transmitted through Smad proteins during early differentiation. This suppression decreases cues that favor non-neural mesodermal and endodermal identities, making neural lineage formation more likely. The combined effect helps pluripotent stem cells adopt a neural progenitor state instead of producing a broader mixture of early developmental fates.
BMP and Activin/Nodal signaling represent separate branches of transforming growth factor beta signaling, and each can contribute to non-neural fate decisions. Targeting both provides broader control over early lineage specification than addressing either branch alone. This coordinated suppression supports more efficient neural induction and can improve the consistency of the resulting neural cell populations.
Spontaneous differentiation allows pluripotent stem cells to receive and interpret endogenous developmental signals without a directed pathway intervention. Dual Smad Inhibition instead actively reduces two signaling inputs associated with alternative lineage outcomes. Consequently, the directed approach is intended to generate neural progenitor cells more efficiently and consistently, which is important when comparable populations are needed across experiments.
The process begins by exposing pluripotent stem cells to small-molecule inhibitors that suppress BMP and Activin/Nodal signaling during early differentiation. Cells are then directed toward a neural progenitor state, after which they can be used to generate neuronal or glial populations. The resulting cells provide a staged system for examining neural development rather than an undirected mixture of lineages.
A primary outcome is the generation of neural progenitor cells, which can subsequently support production of neuronal or glial populations. This progression enables experiments at multiple developmental stages, from early neural specification to more differentiated cell types. Greater consistency in those populations can make comparisons among developmental conditions, disease-related states, or treatment responses more interpretable.
The strategy supplies neural cells from pluripotent stem cells for investigating human neurodevelopment and neurological disease mechanisms. It also supports studies of drug responses and three-dimensional models such as brain organoids. By encouraging neural rather than non-neural fates early in differentiation, it provides a practical foundation for constructing experimental systems that model nervous-system biology.