Intracellular Receptors
Intracellular Receptors - Related Videos
01:08
Intracellular Hormone Receptors
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2025
Lipid-soluble hormones diffuse across the plasma and nuclear membrane of target cells to bind to their specific intracellular receptors. These receptors act as transcription factors that regulate gene expression and protein synthesis in the target cell Based on their mode of action, intracellular hormone receptors are classified as Type I or Type II receptors. Type I receptors, including steroid hormone receptors such as the androgen receptor, are present in the cytoplasm. Hormone binding...
09:06
Localization of Plasma Membrane and Intracellular Neuronal Nicotinic Acetylcholine Receptors Using Quantitative Imaging in Mammalian Cells
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2025
This protocol describes expression and quantification of neuronal nicotinic acetylcholine receptors subunits using the mammalian Neuro-2a cell line. pH-sensitive fluorescent tags and confocal microscopy enable precise evaluation of receptor localization at the plasma membrane versus those expressed in pH-neutral intracellular compartments, facilitating the study of nAChR trafficking and pharmacological modulation.
14:09
Fluorescence Biomembrane Force Probe: Concurrent Quantitation of Receptor-ligand Kinetics and Binding-induced Intracellular Signaling on a Single Cell
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Cited by 55 •
2015
We describe a technique for concurrently measuring force-regulated single receptor-ligand binding kinetics and real-time imaging of calcium signaling in a single T lymphocyte.
07:18
Intracellular Refolding Assay
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Cited by 9 •
2012
In this protocol a method to measure intracellular protein refolding after heat shock is described. This method can be used to study foldases like molecular chaperones and their co-factors or compounds able to influence their activity. Firefly luciferase activity is used as reporter to measure chaperone refolding activity.
12:03
Receptor Autoradiography Protocol for the Localized Visualization of Angiotensin II Receptors
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Cited by 14 •
2016
Here we present a protocol to describe the localization of angiotensin II Type 1 receptors in the rat brain by quantitative, densitometric, in vitro receptor autoradiography using an iodine-125 labeled analog of angiotensin II.
FAQs
A membrane-permeable ligand first reaches the receptor inside the cell and binds selectively to it. This interaction activates the receptor, enabling it to bind DNA and recognize particular hormone response elements. The resulting DNA interaction changes transcription, connecting the ligand’s presence to altered gene activity and downstream physiological regulation.
Intracellular receptors may be positioned in the cytoplasm or nucleus before ligand binding, so their location influences the sequence of signaling events. A cytoplasmic receptor must participate in activation before influencing nuclear DNA, whereas a nuclear receptor can engage gene-regulatory regions more directly. This distinction helps explain differences in signaling organization.
Hormone response elements provide specific DNA sites that activated receptors recognize. Because receptor binding depends on both ligand selectivity and recognition of these response elements, different signals can regulate different sets of genes rather than producing one uniform transcriptional response. This molecular selectivity supports precise control of development, metabolism, and homeostasis.
A conceptual analysis follows the sequence from a membrane-permeable ligand entering the cell, to receptor binding and activation, to DNA association at hormone response elements, and finally to altered transcription. Examining each stage helps distinguish ligand recognition from receptor activation and gene regulation, clarifying where selective control occurs within the pathway.
Endocrine signaling uses circulating hormonal signals to coordinate activity in responsive cells, and intracellular receptors provide a mechanism for translating selected lipophilic hormones into changes in gene activity. By linking hormone exposure with transcriptional regulation, these receptors help account for long-term control of physiological processes such as development, metabolism, and homeostasis.
Their selective ligand-binding properties create opportunities to influence defined signaling pathways through drug design. Studying how ligands interact with receptors, alter receptor activity, and affect hormone response elements can reveal mechanisms associated with disease and identify ways to modify gene regulation. This makes intracellular receptors valuable subjects in both disease research and therapeutic development.