Hedgehog Pathway Inhibition
Hedgehog Pathway Inhibition - Related Videos
02:33
Hedgehog Signaling Pathway
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2021
The Hedgehog gene (Hh) was first discovered due to its control of the growth of disorganized, hair-like bristles phenotype in Drosophila, much like hedgehog spines. Hh plays a crucial role in the development of organs and the maintenance of homeostasis in both invertebrates and vertebrates. However, while Drosophila has only one Hh protein, mammals have multiple functional Hedgehog proteins - Sonic (Shh), Desert (Dhh), and Indian Hedgehog (Ihh). All of these homologous proteins have adapted to...
02:33
Hedgehog Signaling Pathway
0 Views •
2023
The Hedgehog gene (Hh) was first discovered due to its control of the growth of disorganized, hair-like bristles phenotype in Drosophila, much like hedgehog spines. Hh plays a crucial role in the development of organs and the maintenance of homeostasis in both invertebrates and vertebrates. However, while Drosophila has only one Hh protein, mammals have multiple functional Hedgehog proteins - Sonic (Shh), Desert (Dhh), and Indian Hedgehog (Ihh). All of these homologous proteins have adapted to...
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...
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.
01:27
C4 Pathway and CAM
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2019
Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy. C4 Pathway The C4 pathway is used by plants such as...
FAQs
Interfering with ligand binding to Patched or inhibiting Smoothened interrupts the canonical signaling sequence before activation of GLI transcription factors. Because GLI factors regulate target genes associated with proliferation and differentiation, this interruption lowers their downstream expression. The mechanism allows investigators to connect an upstream receptor or pathway component with specific changes in cellular behavior.
GLI transcription factors provide a downstream readout of pathway activity because their activation controls expression of genes involved in proliferation and differentiation. When inhibition prevents GLI activation, reduced target-gene expression indicates that signaling has been suppressed beyond the initial receptor-level event. This relationship helps researchers examine how pathway activity influences cell fate and growth.
Suppression can influence processes that depend on Hedgehog signaling, including embryonic development, tissue maintenance, cell fate decisions, and tissue repair. The significance varies with biological context because the pathway contributes to both developmental patterning and ongoing tissue function. Studying these effects helps clarify how altered signaling may produce abnormal growth or disrupted cellular behavior.
Inhibitors provide a way to reduce pathway activity and examine the resulting changes in signaling-dependent processes. Researchers can use this perturbation to investigate relationships among Patched, Smoothened, GLI transcription factors, and target-gene expression. Such experiments help reveal how Hedgehog signaling contributes to development, tissue maintenance, cell fate, and repair without treating pathway components as isolated mechanisms.
Excessive Hedgehog activity contributes to some cancers and other disorders, so pathway inhibitors help researchers investigate how abnormal signaling supports disease-associated growth. Reducing activity provides a framework for examining whether changes in GLI-regulated target genes and proliferation-related processes accompany pathway suppression. This makes inhibition useful for studying the biological consequences of dysregulated Hedgehog signaling.
Applying inhibition in these contexts can reveal when Hedgehog signaling is required for normal development, tissue maintenance, cell fate, or repair. Observing the consequences of reduced pathway activity helps distinguish signaling roles in embryonic processes from those in maintained or recovering tissues. These findings provide biological context for understanding how the same pathway can support normal function yet contribute to abnormal growth when excessively active.