Related Experiment Video
Updated: Jul 17, 2026
09:37
Topical Application Bioassay to Quantify Insecticide Toxicity for Mosquitoes and Fruit Flies
Published on: January 19, 2022
Insect sodium channels and insecticide resistance
1Department of Entomology, Genetics Program and Neuroscience Program, Michigan State University, East Lansing, MI 48824, USA. dongk@msu.edu
Invertebrate Neuroscience : IN
|January 9, 2007
Summary
Insect sodium channels are crucial for electrical impulses. Research highlights alternative splicing and RNA editing in generating diverse insect sodium channel functions and understanding insecticide resistance.
Area of Science:
- Neuroscience
- Molecular Biology
- Pharmacology
Background:
- Voltage-gated sodium channels are vital for action potential generation in excitable cells.
- Mammalian sodium channel research is extensive, but insect sodium channel studies reveal unique biological aspects.
Purpose of the Study:
- To review recent advancements in insect sodium channel research.
- To emphasize the roles of alternative splicing and RNA editing in insect sodium channel diversity.
- To discuss insect sodium channel interactions with insecticides.
Main Methods:
- Functional expression of insect sodium channels in Xenopus oocytes.
- Elucidation of the molecular basis for insecticide resistance.
- Review of recent scientific literature.
Main Results:
- Alternative splicing and RNA editing significantly contribute to functional diversity in insect sodium channels.
- Progress has been made in understanding the molecular dynamics and pharmacology of insect sodium channels.
- Insights into insect resistance mechanisms against sodium channel-targeting insecticides have been gained.
Conclusions:
- Insect sodium channels exhibit unique properties shaped by alternative splicing and RNA editing.
- Understanding these channels is key to developing novel insecticides and managing resistance.
- Functional expression studies have significantly advanced insect sodium channel research.
Related Concept Videos
01:26Voltage-gated Ion Channels
Voltage-gated ion channels are transmembrane proteins that open and close in response to changes in the membrane potential. They are present on the membranes of all electrically excitable cells such as neurons, heart, and muscle cells.
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several types of...
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several types of...
01:19Ion Channels
The movement of ions like sodium, potassium, and calcium into and out of the cell is essential to maintain the electrochemical gradient in living cells. The ion channels—a class of membrane transport proteins—help maintain this ionic gradient for the smooth functioning of physiological activities such as maintaining cell size and volume, conducting nerve impulses, and gas and nutrient exchange.
Ion channels are specialized integral membrane proteins on the plasma membrane that allow specific...
Ion channels are specialized integral membrane proteins on the plasma membrane that allow specific...
01:19The Role of Ion Channels in Neuronal Computation
A postsynaptic neuron usually receives numerous impulses from several other presynaptic neurons. The axon hillock of the postsynaptic neuron integrates all these signals and determines the likelihood of firing an action potential.
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential.
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential.
01:24Non-gated Ion Channels
Ion channels are specialized proteins on the plasma membrane that allow charged ions to pass down their electrochemical gradient. Their main function is to maintain the membrane potential which is critical for cell viability. These channels are either gated or non-gated and can transport more than a thousand ions within milliseconds for the cellular event to occur.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism.
01:12Mechanically-gated Ion Channels
Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
01:30Ligand-Gated Ion Channel Receptor: Gating Mechanism
Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...