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Related Concept Videos

Chemical Signaling in the Endocrine System01:08

Chemical Signaling in the Endocrine System

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...
Secondary Messengers in Hormone Action01:26

Secondary Messengers in Hormone Action

Water-soluble hormones cannot cross the plasma membrane, so they rely on protein receptors that span the membrane to trigger intracellular signaling pathways. These pathways then activate second messengers inside the cell, including cAMP or calcium ions.
Many hormones bind to transmembrane G protein-coupled receptors that connect to regulatory G proteins. These G proteins can then activate enzymes such as adenylyl cyclase or phospholipase C. Adenylyl cyclase converts ATP to cAMP, activating...
Signal Transduction: Overview01:26

Signal Transduction: Overview

Cells respond to many types of information, often through receptor proteins positioned on the membrane. They respond to chemical signals, such as hormones, neurotransmitters, and other signaling molecules, initiating a series of molecular reactions to produce an appropriate response. This is called signal transduction. Cells also coordinate different responses elicited by the same signaling molecule via mediators, allowing molecular cross-talk.
Typically, signal transduction involves three...
Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
Endocrine Signaling01:45

Endocrine Signaling

Endocrine cells produce hormones to communicate with remote target cells found in other organs. The hormone reaches these distant areas using the circulatory system. This exposes the whole organism to the hormone but only those cells expressing hormone receptors or target cells are affected. Thus, endocrine signaling induces slow responses from its target cells but these effects also last longer.
Endocrine Signaling01:45

Endocrine Signaling

Endocrine cells produce hormones to communicate with remote target cells found in other organs. The hormone reaches these distant areas using the circulatory system. This exposes the whole organism to the hormone but only those cells expressing hormone receptors or target cells are affected. Thus, endocrine signaling induces slow responses from its target cells but these effects also last longer.

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Related Experiment Video

Updated: May 24, 2026

Systems Biology of Metabolic Regulation by Estrogen Receptor Signaling in Breast Cancer
10:36

Systems Biology of Metabolic Regulation by Estrogen Receptor Signaling in Breast Cancer

Published on: March 17, 2016

Hormetic signaling patterns.

Reinhard Wetzker1, Ignacio Rubio

  • 1Institute of Molecular Cell Biology, CMB-Center for Molecular Biomedicine, Jena University Hospital, Germany.

Dose-Response : a Publication of International Hormesis Society
|March 17, 2012
PubMed
Summary
This summary is machine-generated.

Organisms respond to stress in diverse ways, leading to either enhanced vitality or degeneration. Understanding the molecular signaling pathways is key to harnessing the body's regenerative potential.

Keywords:
AdaptationMolecular signaturesSignalingStress response

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Area of Science:

  • Molecular biology
  • Cellular biology
  • Stress response mechanisms

Background:

  • Organisms exhibit varied responses to noxious insults, ranging from enhanced vitality to injury.
  • The molecular mechanisms underlying these stress reactions are largely unknown.
  • Understanding stress response signaling is crucial for medicine.

Purpose of the Study:

  • To explore molecular signaling pathways controlling ambivalent cellular and organismic responses to noxious effects.
  • To investigate adaptive responses of signaling networks to stress stimuli.
  • To elucidate the molecular signatures of stress responses.

Main Methods:

  • Time- and dose-resolved investigation of signaling networks.
  • Utilizing cellular and organismic models.
  • Analyzing molecular signaling reactions.

Main Results:

  • Identified diverse reaction patterns in biological systems to stress stimuli.
  • Highlighted the gap in knowledge regarding molecular mechanisms of stress response.
  • Emphasized the need for detailed investigation of signaling pathways.

Conclusions:

  • Further research into molecular signaling is essential for understanding stress responses.
  • Elucidating these pathways can advance preventive and regenerative medicine.
  • This study aims to bridge the knowledge gap in stress response mechanisms.