Drosophila Larval Nmj
Drosophila Larval Nmj - Related Videos
06:42
Drosophila Larval NMJ Dissection
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Cited by 115 •
2009
This protocol demonstrates how to dissect Drosophila larvae in preparation for immunohistochemistry and/or imaging of the neuromuscular junction.
10:10
Drosophila Larval NMJ Immunohistochemistry
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Cited by 26 •
2009
This protocol demonstrates how to perform immunohistochemistry on dissected Drosophila larva.
05:46
Electrophysiological Methods for Recording Synaptic Potentials from the NMJ of Drosophila Larvae
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Cited by 29 •
2009
Here we describe electrophysiological methods for measuring synaptic transmission at the neuromuscular junction of Drosophila larva. Evoked release is initiated artificially by stimulating the motor neuron axons, and transmission through the NMJ can be measured by the postsynaptic response evoked in the muscle.
08:29
Drosophila Larval IHC
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2023
Immunohistochemistry (IHC) is a technique used to visualize the presence and location of proteins within tissues. Drosophila larvae are particularly amenable to IHC because of the ease with which they can be processed for staining. Additionally, the larvae are transparent, meaning that some tissues can be visualized without the need for dissection. In IHC, proteins are ultimately detected with antibodies that specifically bind to “epitopes” within the protein of interest. In order to preserve...
05:08
Drosophila Neuromuscular Junction (NMJ) Quantification: A Method to Assess Synaptic Morphology and Function
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2023
The Drosophila neuromuscular junction (NMJ) is used as a model to study the morphology and function of synapses. This video describes important features that researchers quantify to characterize the NMJ. The example protocol demonstrates a software able to perform the quantification automatically.
FAQs
Calcium influx provides the immediate link between presynaptic electrical activity and chemical release. When an action potential reaches the motor-neuron terminal, calcium entry triggers synaptic vesicle fusion with the presynaptic membrane. This timing allows the terminal to convert a brief electrical event into glutamate release, making calcium-dependent release a central point for analyzing changes in synaptic transmission.
After glutamate is released from the motor-neuron terminal, it activates receptors on the muscle cell. Receptor activation produces the postsynaptic response that transmits the synaptic signal into the muscle. Examining this step separately from presynaptic release helps distinguish changes in neurotransmitter output from changes in how effectively the muscle responds to the transmitter.
The larval NMJ supports analysis of both synaptic plasticity and homeostatic regulation. Plasticity concerns changes in synaptic function, whereas homeostatic regulation concerns mechanisms that help maintain appropriate signaling when synaptic conditions change. Studying these processes in the same defined connection helps researchers relate altered transmission to broader principles of synaptic stability and adaptation.
Powerful genetic tools allow researchers to investigate how molecular changes affect synaptic development and signaling within an accessible, defined circuit. By using the system to examine particular genetic influences, investigators can connect changes at the synapse with altered transmission, plasticity, or homeostatic regulation. This makes the NMJ useful for linking cellular mechanisms to functional consequences.
The signaling sequence provides a framework for separating effects at the motor-neuron terminal from effects in the muscle. Presynaptic changes may alter calcium-triggered vesicle fusion or glutamate release, while postsynaptic changes may alter the muscle response to released glutamate. This distinction helps interpret how molecular alterations reshape transmission rather than treating the synapse as a single undifferentiated unit.
Research at the larval NMJ can connect molecular changes at synapses with effects on motor function. Its accessible anatomy, defined circuit, and genetic tractability support investigation of how altered synaptic development, transmission, plasticity, or homeostatic regulation may influence neural performance. These relationships provide a basis for clarifying mechanisms that are relevant to neurological disease.