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Updated: Jul 16, 2026

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Evaluation of Synapse Density in Hippocampal Rodent Brain Slices
Published on: October 6, 2017
The neuro-neoplastic synapse: does it exist?
1Institute of Immunology, Witten/Herdecke University, Witten, Germany.
Progress in Experimental Tumor Research
|February 23, 2007
Summary
Tumor growth and metastasis involve both blood vessel formation (angiogenesis) and nerve development (neurogenesis). Targeting the signaling molecules that drive both processes offers new anti-cancer strategies.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- Tumor growth and metastasis are complex processes involving tumor microenvironment interactions.
- Research on tumor neoangiogenesis has identified key molecular targets for anti-angiogenic therapy.
- The parallel growth of blood vessels and nerves in tumors suggests shared signaling pathways.
Purpose of the Study:
- To explore the concept of a 'neuro-neoplastic synapse' in tumor growth and metastasis.
- To identify common signaling molecules involved in both tumor vascularization and innervation.
- To propose an extended model of tumor dormancy and metastasis based on angiogenic and neurogenic switches.
Main Methods:
- Review of existing literature on tumor angiogenesis, neurogenesis, and molecular signaling.
- Conceptual modeling of tumor-host interactions.
- Analysis of signaling pathways involved in vascular and neural development within tumors.
Main Results:
- Tumor cells utilize common signaling cues for both vascularization and innervation.
- A 'neuro-neoplastic synapse' model highlights cross-talk between tumor cells and neurocrine cells.
- Angiogenic and neurogenic factors are potential therapeutic targets.
Conclusions:
- Targeting the shared molecular pathways of angiogenesis and neurogenesis presents a promising anti-cancer strategy.
- Understanding the 'neuro-neoplastic synapse' can lead to novel treatments for tumor dormancy and metastasis.
- An angiogenic and neurogenic switch model provides a framework for future research.
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The Synapse
Neurons communicate with one another by passing on their electrical signals to other neurons. A synapse is the location where two neurons meet to exchange signals. At the synapse, the neuron that sends the signal is called the presynaptic cell, while the neuron that receives the message is called the postsynaptic cell. Note that most neurons can be both presynaptic and postsynaptic, as they both transmit and receive information.
Synaptic Signaling
Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
Most synapses are chemical, meaning an electrical impulse or action potential spurs the release of chemical messengers called neurotransmitters. The neuron sending the signal is called the presynaptic neuron, and the neuron receiving the signal is the postsynaptic neuron.
The presynaptic neuron fires an action potential that...
Most synapses are chemical, meaning an electrical impulse or action potential spurs the release of chemical messengers called neurotransmitters. The neuron sending the signal is called the presynaptic neuron, and the neuron receiving the signal is the postsynaptic neuron.
The presynaptic neuron fires an action potential that...
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Neurons, the fundamental units of the brain and nervous system, communicate through complex electrochemical signals that underpin all cognitive and bodily functions. This communication is primarily facilitated by a process involving the generation and propagation of an action potential along the axon of the neuron. When the internal electrical charge of a neuron surpasses a certain threshold, an action potential is triggered. This rapid change in voltage travels swiftly along the axon to the...
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A synapse is a specialized structure where two neurons connect, allowing them to pass an electrical or chemical signal to another neuron. It is the point of communication between neurons. The term "synapse" is derived from the Greek word "synapsis," which means "conjunction." The entire process of neural communication revolves around the synapse. When activated, a neuron releases chemicals known as neurotransmitters into the synapse. These neurotransmitters cross the synapse and bind to...
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Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
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