Hormone Response Elements
Hormone Response Elements - Related Videos
11:01
Monitoring Plant Hormones During Stress Responses
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Cited by 11 •
2009
A simple method is provided that allows for the rapid extraction and analysis of multiple plant hormones from small tissue samples. The procedure uses vapor phase extraction as the solemn purification step. Samples are analyzed by GC/MS with chemical ionization that produces mainly (M+1)+ ions.
08:24
A Hormone-responsive 3D Culture Model of the Human Mammary Gland Epithelium
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Cited by 3 •
2016
We describe a 3D culture model of the human breast epithelium that is suitable to study hormone action.
02:13
Types of Hormones
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2019
Hormones can be classified into three main types based on their chemical structures: steroids, peptides, and amines. Their actions are mediated by the specific receptors they bind to on target cells. Steroid hormones are derived from cholesterol and are lipophilic in nature. This allows them to readily traverse the lipid-rich cell membrane to bind to their intracellular receptors in the cytoplasm or nucleus. Once bound, the cytoplasmic hormone-receptor complex translocates to the nucleus.
01:22
Target Cell Response to Hormones
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2024
Hormones intricately bind to receptors on the surface or within target cells, initiating a cascade of cellular responses. Notably, the cellular response can be regulated by altering the number of receptors expressed in the cell. For example, prolonged exposure to elevated hormone levels results in a gradual decline or down-regulation in the number of receptors for that specific hormone on the cell surface. Conversely, in response to low hormone levels, cells may use up-regulation, producing an...
01:56
Plant Hormones
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2020
Plant hormones—or phytohormones—are chemical molecules that modulate one or more physiological processes of a plant. In animals, hormones are often produced in specific glands and circulated via the circulatory system. However, plants lack hormone-producing glands. Instead, plant hormones are often produced in regions of active growth, like the tips of roots and shoots. Additionally, even very low concentrations of plant hormones can have a profound effect on growth and development processes.
FAQs
The receptor complex does not simply switch every associated gene on. After recognizing a matching DNA sequence, it recruits regulatory proteins that can either increase or decrease transcription. This opposing activity allows hormone signaling to produce different gene-expression outcomes, depending on which regulatory proteins participate at the target gene.
A nearby hormone response element provides a regulatory site through which the hormone-bound receptor can affect transcription of an associated gene. Examining this relationship helps connect receptor binding with promoter activity and clarifies how an extracellular hormone signal is translated into a specific cellular gene-expression response.
Hormone response elements help explain why hormonal signals can produce different effects in different tissues. Their analysis connects receptor activity with the regulation of particular target genes, supporting studies of tissue-specific gene expression. This is especially relevant when investigating how the same endocrine signal participates in development, normal biology, or disease.
Analysis can reveal how promoter activity is regulated, how effectively a receptor controls a target gene, and how hormonal signals alter transcription. These findings provide molecular context for studying receptor function and the cellular responses associated with steroid and other hormone signaling, without treating hormone concentration alone as the complete explanation.
They provide a molecular framework for examining how disrupted hormone signaling may alter gene expression. By relating receptor regulation to target-gene control, researchers can investigate mechanisms associated with endocrine disorders and identify how abnormal transcriptional responses contribute to disease-related biology.
Hormone response elements help researchers examine how therapeutic hormones influence transcription through their receptors. Studying the relevant regulatory sequences can clarify the gene-expression effects of treatment and support investigation of receptor function, tissue responses, and the molecular consequences of hormone-based therapies.