Novel Assay for Cold Nociception in <em>Drosophila</em> Larvae

Heather N. Turner; Christian Landry; Michael J. Galko

doi:10.3791/55568

Novel Assay for Cold Nociception in Drosophila Larvae

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Neuroscience

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JoVE Journal Neuroscience

Novel Assay for Cold Nociception in Drosophila Larvae

Novel Assay for Cold Nociception in Drosophila Larvae

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06:52 min

April 3, 2017

DOI: 10.3791/55568-v

Heather N. Turner^1,2,5, Christian Landry³, Michael J. Galko^1,2,4

¹Department of Genetics,UT MD Anderson Cancer Center, ²Neuroscience Program,Graduate School of Biomedical Sciences at Houston, ³ProDev Engineering, ⁴Genes and Development Program,Graduate School of Biomedical Sciences at Houston, ⁵Section of Neurobiology,University of Southern California

Overview

This study presents a novel assay for investigating cold nociception in Drosophila larvae using a custom-built Peltier probe. The method enables precise application of noxious cold stimuli and quantification of cold-specific behaviors, facilitating further exploration of cold nociception at cellular and molecular levels.

Key Study Components

Area of Science

Neuroscience
Behavioral Biology
Genetics

Background

Cold nociception is a critical aspect of pain perception.
Drosophila larvae are known to respond to noxious heat.
This study investigates their response to noxious cold.
The assay allows for manipulation of environmental and genetic contexts.

Purpose of Study

To quantify changes in cold detection from innocuous to noxious levels.
To identify novel genes and modulators involved in cold nociception.
To enhance understanding of pain responses in various conditions.

Methods Used

Custom-built Peltier probe for cold stimulus application.
Behavioral assays to measure cold-evoked responses.
Genetic manipulation of Drosophila larvae.
Environmental control during experiments.

Main Results

The assay successfully quantifies cold-specific behaviors in larvae.
Responses to noxious cold were observed and recorded.
Potential for identifying conserved cold nociception genes.
Demonstrated the assay's versatility across different contexts.

Conclusions

The novel assay provides a reliable method for studying cold nociception.
It opens avenues for further research into pain mechanisms.
Future studies can leverage this technique for deeper insights into nociception.

Frequently Asked Questions

What is cold nociception?

Cold nociception refers to the sensory perception of harmful cold stimuli.

How does the Peltier probe work?

The Peltier probe applies a controlled cold stimulus to the larvae for behavioral assessment.

What are the advantages of this assay?

It allows precise manipulation of cold stimuli and quantification of responses in various contexts.

What species is used in this study?

Drosophila larvae are used to study cold nociception.

What can this assay help identify?

It can help identify novel genes and modulators related to cold nociception.

Is prior experience needed to use this method?

Yes, consistent application of the probe is recommended before experiments.

What temperature should Drosophila be raised at?

Drosophila stocks should be raised at 25 degrees Celsius.

Here we demonstrate a novel assay to study cold nociception in Drosophila larvae. This assay utilizes a custom-built Peltier probe capable of applying a focal noxious cold stimulus and results in quantifiable cold-specific behaviors. This technique will allow further cellular and molecular dissection of cold nociception.

The overall goal of this noxious cold assay is to be able to quantitate and assess changes in innocuous to noxious cold detection. This method can help answer key questions in the nociception field, including facilitating identification of novel, conserved, cold nociception genes and modulators of pain responses in disease and or injury. The main advantage of this technique is it allows for precise manipulation of the noxious cold stimulus and quantification of cold evoked responses over a variety of environmental and genetics contexts.

Generally individuals new to this method will need to practice consistent application of the probe before beginning an experiment. We first had the idea for this method when we found the that drosophila larvae respond to noxious heat and we became curious about whether they do the same to noxious cold. Raise stocks or genetic crosses of drosophila in a 25 degrees Celsius incubator.

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