Pharmacological Inhibitors
Pharmacological Inhibitors - Related Videos
01:52
Eukaryotic Transcription Inhibitors
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Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding proteins known as eukaryotic transcription inhibitors regulate the repression of gene expression in eukaryotes. The presence of these inhibitors at the required location and time in the cell is triggered by the presence of hormones and additional signals from other cells. Eukaryotic transcription inhibitors usually contain two distinct domains, a DNA...
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04:00
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This video demonstrates the in vivo delivery of miRNA inhibitors as therapeutic agents against tumor growth in orthotopic mouse models. The intratumoral administration of synthetic miRNA inhibitors or antagomiRs allows them to bind and inhibit endogenous miRNAs, thereby causing mRNA upregulation and suppression of tumor growth.
09:58
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An attractive model for studying stem cell differentiation within a live animal is the planarian flatworm. Regeneration is studied by simple amputation experiments that are easily performed in a basic laboratory and are amenable to pharmacological and genetic (in vivo RNAi) manipulation as detailed by protocols in this article.
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Assessing Changes in Volatile General Anesthetic Sensitivity of Mice after Local or Systemic Pharmacological Intervention
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Cited by 23 •
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Loss of the righting reflex has long served as a standard behavioral surrogate for unconsciousness, also called hypnosis, in laboratory animals. Alterations in volatile anesthetic sensitivity caused by pharmacological interventions can be detected with a carefully controlled high-throughput assessment system, which may be adapted for delivery of any inhaled therapeutic.
FAQs
Their effect depends on which molecular interaction is disrupted. Binding to an enzyme can reduce catalytic activity, whereas binding to a receptor may interfere with ligand binding. An inhibitor can also interrupt intracellular signaling through a regulatory protein. These distinctions matter because the affected step determines which downstream cancer-cell behaviors can be examined and how target activity is interpreted.
Different tumors may respond differently because the relevant target is not expressed at the same level, or because the pathway is not activated in the same way. Consequently, reducing one target’s activity may strongly affect a tumor dependent on that pathway but have a smaller effect elsewhere. These differences help researchers relate treatment response to tumor biology rather than assuming uniform drug activity.
In target validation, the key question is whether changing a target’s activity produces effects consistent with its proposed role in cancer. Pharmacological inhibitors provide a way to examine that relationship by reducing target activity and observing consequences for proliferation, survival, metabolism, or signaling. Concordance between target inhibition and the expected cellular response can support further investigation of the pathway.
A basic evaluation begins by selecting a biological target and applying an inhibitor to a cancer research model, then examining the resulting response. Researchers can assess whether target inhibition is associated with changes in proliferation, survival, metabolism, signaling, or resistance. Comparing these observations with the target’s expression or pathway activation helps connect the compound’s effect to tumor biology.
These compounds can be used to examine several cancer-relevant outcomes, including tumor-cell proliferation, survival, metabolism, and drug resistance. Each outcome offers a different view of pathway function: growth changes may indicate effects on proliferation, while survival or metabolic changes may reveal other consequences of target activity. Resistance responses can show how tumor biology influences treatment effectiveness.
Pharmacological inhibitors support precision treatment by linking a tumor’s molecular features to its likely response. Measurements of target expression and pathway activation can help explain why one tumor responds while another does not. This information supports selection or development of treatments directed at relevant biological vulnerabilities, while response differences also highlight the need to consider tumor-specific biology.