Related Experiment Video
Updated: Jun 11, 2025
10:19
Video Tracking Protocol to Screen Deterrent Chemistries for Honey Bees
Published on: June 12, 2017
6.6K
Why do repellents repel?
1Institut de Recherche sur la Biologie de l'Insecte, UMR CNRS 7261 - University of Tours, France.
Current Opinion in Insect Science
|September 27, 2024
Summary
Finding effective and safe insect repellents is crucial for disease control. Current repellents, including DEET, have limitations, and a better understanding of their mechanisms is needed for developing novel alternatives.
Area of Science:
- Entomology
- Toxicology
- Environmental Science
Background:
- Insect repellents protect humans and animals from bites, aiding in vector-borne disease control.
- Numerous commercial repellents exist, but their efficacy and safety for humans, animals, and the environment vary.
- There is a critical need for novel, non-toxic, and eco-friendly insect repellent alternatives.
Purpose of the Study:
- To review current knowledge on insect repellent mechanisms.
- To identify gaps in understanding how repellents deter mosquitoes and other biting arthropods.
- To guide future research and development of effective and safe repellents.
Main Methods:
- Literature review of existing research on insect repellents.
- Analysis of the efficacy and safety profiles of current repellent formulations.
- Discussion of the limitations in understanding repellent action, including DEET.
Main Results:
- Current understanding of how insect repellents work, even the widely used DEET, is incomplete.
- Not all available repellents offer sufficient protection or are safe for widespread use.
- Significant knowledge gaps hinder the development of next-generation repellents.
Conclusions:
- Further research into the fundamental mechanisms of insect repellency is essential.
- Developing novel, safe, and environmentally friendly repellents requires a deeper scientific understanding.
- Addressing current limitations will facilitate the creation of more effective personal protection strategies against biting arthropods.
Related Concept Videos
01:21Chemotaxis and Direction of Cell Migration
3.3K
Cells can detect chemical cues in their environment and reorganize the cytoskeleton to migrate toward them or away from them. This directional migration, called chemotaxis, is essential during embryogenesis and development, immune response, tissue repair and regeneration, and reproduction. These chemical cues can either attract or repel the cell's movement. For example, axon development is determined by a combination of chemoattractants and chemorepellents that direct the growing axon...
3.3K
01:18Indirect-Acting Cholinergic Agonists: Mechanism of Action
1.8K
Indirect-acting cholinergic agonists work by interacting with an enzyme called acetylcholinesterase (AChE) in the synaptic cleft. They can be reversible or irreversible inhibitors and have different effects on the enzyme.
Reversible inhibitors like edrophonium bind to a specific part of the enzyme called the anionic catalytic site. They form noncovalent bonds, which means they are not strongly attached to the enzyme. This creates a temporary and less stable enzyme–inhibitor complex,...
Reversible inhibitors like edrophonium bind to a specific part of the enzyme called the anionic catalytic site. They form noncovalent bonds, which means they are not strongly attached to the enzyme. This creates a temporary and less stable enzyme–inhibitor complex,...
1.8K
01:17Nondepolarizing (Competitive) Neuromuscular Blockers: Mechanism of Action
1.7K
Nondepolarizing neuromuscular blockers induce paralysis by competitively blocking nicotinic acetylcholine receptors at the muscle end plate. Examples include pancuronium, mivacurium, vecuronium, and rocuronium. These quaternary ammonium derivatives are administered intravenously, are poorly absorbed, and are excreted via the kidneys.
Competitive antagonists prevent acetylcholine from binding to its receptor, inhibiting membrane depolarization. Without conformational changes or intrinsic...
Competitive antagonists prevent acetylcholine from binding to its receptor, inhibiting membrane depolarization. Without conformational changes or intrinsic...
1.7K
02:26Defenses Against Pathogens and Herbivores
23.2K
Plants present a rich source of nutrients for many organisms, making it a target for herbivores and infectious agents. Plants, though lacking a proper immune system, have developed an array of constitutive and inducible defenses to fend off these attacks.
23.2K
01:29Indirect-Acting Cholinergic Agonists: Chemistry and Structure-Activity Relationship
542
Indirect-acting cholinergic agonists are agents that interact with the acetylcholinesterase enzyme in the synaptic cleft, preventing the breakdown of acetylcholine into choline and acetate. Consequently, the concentration of acetylcholine in the synaptic cleft increases. These agonists can be classified into reversible and irreversible inhibitors based on their duration of action.
Reversible inhibitors display short to medium durations of action. Short-acting agents include simple alcohols with...
Reversible inhibitors display short to medium durations of action. Short-acting agents include simple alcohols with...
542
01:23Local Anesthetics: Mechanism of Action
2.2K
Local anesthetics (LAs) block sensory and motor impulses by inhibiting the sodium channels on the nerve cell membranes. This induces temporary loss of sensation, relieving pain in a specific body area.
Local anesthetics are amphiphilic molecules consisting of a hydrophobic aromatic part linked to a hydrophilic group by an ester or amide linkage. They are weak bases and are usually available as salts, which increases their solubility and stability. Once administered, LAs exist in the body either...
Local anesthetics are amphiphilic molecules consisting of a hydrophobic aromatic part linked to a hydrophilic group by an ester or amide linkage. They are weak bases and are usually available as salts, which increases their solubility and stability. Once administered, LAs exist in the body either...
2.2K