Chemical Signaling
Chemical Signaling - Related Videos
01:08
Chemical Signaling in the Endocrine System
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2024
A signaling cascade is a series of events that facilitates the transmission of information within or between cells, culminating in a targeted response in the recipient cell. As chemical messengers, hormones are pivotal in initiating and modulating these intricate signaling cascades based on their solubility. Lipid-soluble hormones, such as steroid hormones, demonstrate an intracellular action. These hormones traverse cell membranes due to their lipid nature. Once inside the target cell, they...
08:49
Identification of Mediators of T-cell Receptor Signaling via the Screening of Chemical Inhibitor Libraries
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Cited by 2 •
2019
This paper uses a flow-cytometry-based assay to screen libraries of chemical inhibitors for the identification of inhibitors and their targets that influence T-cell receptor signaling. The methods described here can also be expanded for high-throughput screenings.
13:22
A Chemical Screening Procedure for Glucocorticoid Signaling with a Zebrafish Larva Luciferase Reporter System
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Cited by 11 •
2013
We describe the procedure and data analysis of a chemical screening system for glucocorticoid stress hormone signaling using zebrafish larvae: the Glucocorticoid Responsive In vivo Zebrafish Luciferase activitY (GRIZLY) assay. The assay sensitively and specifically detects effects on glucocorticoid signaling by compounds that require metabolization or affect endogenous glucocorticoid production.
02:52
Chemical Formulas
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2020
A chemical formula presents information about the proportions of atoms constituting a particular chemical compound or molecule, mainly using symbols of elements and numbers. At times other symbols, such as dashes, parentheses, brackets, commas, plus, and minus signs, are also used. A chemical formula can be one of three types – molecular, empirical, and structural. Molecular Formula The molecular formula represents a molecule or a chemical compound using chemical symbols (to indicate the...
03:10
Chemical Equations
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2020
Chemical equations represent the identities and relative quantities of substances involved in a chemical reaction. The substances undergoing reaction are called reactants, and their formulas are placed on the left side of the equation. The substances generated by the reaction are called products, and their formulas are placed on the right side of the equation. Plus signs (+) separate individual reactant and product formulas, and an arrow (→) separates the reactant and product (left and right)...
FAQs
Specific receptor binding determines which cells respond to a chemical signal. A signal molecule interacts with its matching receptor on a target cell, initiating intracellular pathways rather than affecting every nearby cell equally. Those pathways can change gene expression, metabolism, movement, or behavior, allowing the same biological system to produce selective and coordinated outcomes.
The communication range changes how signaling coordinates biological activity. Direct-contact signaling acts between neighboring cells, whereas other signals travel across short or long distances to reach target cells. Hormones, neurotransmitters, and pheromones illustrate the broader range of chemical communication, supporting local coordination as well as regulation across tissues or between organisms.
Receptor binding is the starting point, not the complete response. It triggers intracellular pathways that translate information outside the cell into functional changes inside it. Depending on the pathway and target cell, the result may involve altered gene expression, metabolism, movement, or behavior. This conversion connects chemical information with observable biological activity.
Chemical signaling contributes to several major biological processes, including development, homeostasis, and immune responses. It also supports communication within nervous and endocrine systems, where coordinated cellular activity is essential. Examining which signals, receptors, and intracellular responses operate in these settings helps explain how organisms maintain functions and adjust them when conditions change.
A useful analysis follows the sequence from signal molecule to receptor, intracellular pathway, and biological outcome. Researchers can then relate the observed response to processes such as development, homeostasis, immunity, or communication in nervous and endocrine systems. This framework helps connect cellular communication with changes in metabolism, gene expression, movement, or behavior.
Chemical signaling becomes especially relevant when altered cellular communication contributes to disease mechanisms. Studying the responsible signals, receptors, or intracellular pathways can reveal potential drug targets. Therapies may then be designed to modify communication between cells or organisms, with the goal of changing the biological responses associated with the condition.