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Related Concept Videos

Integration of Synaptic Events01:28

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Synaptic integration mainly includes the summation of graded potentials. Graded potentials, regardless of their type, cause subtle alterations in membrane voltage, resulting in either depolarization or hyperpolarization. These incremental changes, when combined or summed, can propel the neuron toward its threshold. Consider, for example, a membrane experiencing a +15 mV shift, causing it to depolarize from -70 mV to -55 mV. In this scenario, graded potentials govern the membrane's ability to...
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Chemical Synapses01:26

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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.
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Chemical Synapses01:26

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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.
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The Synapse02:47

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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.
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Overview of Synapses01:25

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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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Electrical synapses found in all nervous systems play important and unique roles. In these synapses, the presynaptic and postsynaptic membranes are very close together (3.5 nm) and are actually physically connected by channel proteins forming gap junctions.
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Concerning immune synapses: a spatiotemporal timeline.

Alvaro Ortega-Carrion1, Miguel Vicente-Manzanares1

  • 1Immunology Section, Department of Medicine, Universidad Autonoma de Madrid School of Medicine, Madrid, Spain.

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|April 20, 2016
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Summary
This summary is machine-generated.

The immune synapse forms during T cell and antigen-presenting cell interactions. This review explores its formation timeline, focusing on cytotoxic versus T helper cell differences and ongoing research questions.

Keywords:
Immune synapseT cell activationT-Cellantigen presenting cell

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Area of Science:

  • Immunology
  • Cell Biology
  • Neuroscience

Background:

  • The immune synapse shares similarities with neuronal synapses.
  • It mediates crucial T cell and antigen-presenting cell (APC) interactions.
  • Understanding immune synapse formation is key to T cell function.

Purpose of the Study:

  • To provide a spatiotemporal overview of immune synapse formation.
  • To highlight distinctions between cytotoxic and T helper cell synapses.
  • To address unresolved issues and controversies in immune synapse biology.

Main Methods:

  • Review of existing literature on immune synapse formation.
  • Analysis of molecular events during T cell-APC contact.
  • Comparative analysis of cytotoxic T lymphocyte (CTL) and T helper cell synapses.

Main Results:

  • Immune synapse formation follows a timeline from initial contact to termination.
  • Specific molecular players and structural differences distinguish CTL and T helper synapses.
  • Several aspects of immune synapse formation remain areas of active debate.

Conclusions:

  • The immune synapse is a dynamic structure critical for adaptive immunity.
  • Further research is needed to fully elucidate the complexities of immune synapse assembly and function.
  • Distinguishing between different T cell types' synapses offers insights into specialized immune responses.