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Related Concept Videos

Sympathetic Signaling01:32

Sympathetic Signaling

885
Sympathetic signaling, a vital part of the autonomic nervous system, plays a crucial role in mobilizing the body's resources in response to stress or emergencies. It involves the transmission of nerve impulses from sympathetic preganglionic fibers to postganglionic fibers. This results in the release of specific neurotransmitters and activation of adrenergic receptors.
Sympathetic preganglionic fibers release the neurotransmitter acetylcholine (ACh) onto the ganglionic neurons in the...
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The Sympathetic Nervous System01:25

The Sympathetic Nervous System

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Overview
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Sympathetic Pathways: Collateral Ganglia and Adrenal Medulla01:28

Sympathetic Pathways: Collateral Ganglia and Adrenal Medulla

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The sympathetic pathways of the collateral ganglia and adrenal medulla serve unique but interconnected roles in the sympathetic response.
Collateral Ganglia
Sympathetic preganglionic axons reach the collateral ganglia along the route of splanchnic nerves. These nerves bypass the sympathetic trunk and communicate with sympathetic postganglionic neurons housed in the prevertebral ganglia. These ganglia supply the organs of the abdominopelvic cavity.
The greater splanchnic nerve, formed by the...
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Sympathetic Division of the ANS01:19

Sympathetic Division of the ANS

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The sympathetic division of the autonomic nervous system (ANS) plays a crucial role in preparing the body for stress, physical activity, and increased energy demands. This division activates the "fight-or-flight" response, enabling individuals to respond effectively to challenging situations.
Originating in the thoracic and lumbar spinal cord segments, the preganglionic fibers of the sympathetic division exit the spinal cord through the white ramus communicans. They then enter the...
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Sympathetic Activation01:17

Sympathetic Activation

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The sympathetic division can influence tissues and organs by releasing norepinephrine at peripheral synapses and distributing epinephrine and norepinephrine through the bloodstream. In times of crisis or stress, sympathetic activation occurs, which is regulated by sympathetic centers in the hypothalamus. As a result, sympathetic activation prepares the body for physical exertion, rapid ATP production, and heightened alertness, allowing individuals to respond effectively to challenging or...
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Gross Anatomy of the Lungs01:17

Gross Anatomy of the Lungs

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The lungs are a pair of vital organs connected to the trachea via the left and right bronchi. The base of these organs meets the dome-shaped muscle known as the diaphragm. Encased by the pleurae, the lungs contact the mediastinum. The right lung is shorter yet wider, and has a larger volume than the left lung. The left lung has an indentation known as the cardiac notch. The superior region of the lungs is referred to as the apex, whereas the base is the lower region near the diaphragm. The...
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Related Experiment Video

Updated: Jun 8, 2025

Author Spotlight: Exploring the Role of Inflammation in the Co-occurrence of Primary Sjogren's Syndrome and Lung Adenocarcinoma
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Author Spotlight: Exploring the Role of Inflammation in the Co-occurrence of Primary Sjogren's Syndrome and Lung Adenocarcinoma

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Sympathetic Neurons Promote Small Cell Lung Cancer through the β2-Adrenergic Receptor.

Tala Fnu1,2, Peiguo Shi3,4, Wanwei Zhang5

  • 1Department of Medicine, Columbia Center for Human Development, Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, New York.

Cancer Discovery
|November 8, 2024
PubMed
Summary

Targeting sympathetic nerves or the ADRB2 receptor slows small cell lung cancer (SCLC) progression. Inhibiting ADRB2 disrupts PKA signaling, offering a new therapeutic strategy for aggressive SCLC.

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Area of Science:

  • Oncology
  • Neuroscience
  • Pharmacology

Background:

  • Small cell lung cancer (SCLC) is an aggressive malignancy with limited therapeutic options.
  • The role of the sympathetic nervous system in SCLC progression is not well understood.

Purpose of the Study:

  • To investigate the role of sympathetic nerve activity and ADRB2 signaling in SCLC.
  • To identify novel therapeutic targets for SCLC treatment.

Main Methods:

  • Ablation of sympathetic nerves in a mouse model of SCLC.
  • Pharmacological inhibition of the ADRB2 receptor in mice, human SCLC organoids, and xenografts.
  • Analysis of SCLC progression, survival, and PKA signaling pathways.

Main Results:

  • Ablating sympathetic nerves or inhibiting ADRB2 significantly slowed SCLC progression and improved survival in mice.
  • ADRB2 inhibition reduced the growth of human SCLC organoids and xenografts.
  • ADRB2 inhibition was found to disrupt PKA signaling in SCLC cells.

Conclusions:

  • Sympathetic nerve activity and ADRB2 signaling represent a potential therapeutic vulnerability in SCLC.
  • Targeting ADRB2 offers a promising new strategy for SCLC treatment by disrupting PKA signaling.