Related Experiment Video
Updated: May 11, 2025
10:29
Measuring Oral Fatty Acid Thresholds, Fat Perception, Fatty Food Liking, and Papillae Density in Humans
Published on: June 4, 2014
20.0K
Cholesterol taste avoidance in Drosophila melanogaster
Roshani Nhuchhen Pradhan1, Craig Montell2, Youngseok Lee1
1Department of Bio and Fermentation Convergence Technology, Kookmin University, Seoul, Republic of Korea.
Elife
|April 17, 2025
Summary
Fruit flies can taste cholesterol, avoiding high levels through specific gustatory receptor neurons. This detection relies on five ionotropic receptors (IRs), revealing a new sensory capability in insects.
Area of Science:
- Neuroscience
- Sensory Biology
- Insect Physiology
Background:
- The ability of animals to taste cholesterol is not fully understood.
- Investigating the gustatory system of *Drosophila melanogaster* (fruit flies) for cholesterol detection.
Purpose of the Study:
- To determine if fruit flies can detect cholesterol via their gustatory system.
- To identify the sensory mechanisms and receptors involved in cholesterol detection.
Main Methods:
- Behavioral assays to observe fly responses to varying cholesterol concentrations.
- Genetic manipulation of gustatory receptor neurons (GRNs) and ionotropic receptors (IRs).
- Ectopic expression of IRs in GRNs to identify receptor subunits.
Main Results:
- Flies exhibit indifference to low cholesterol levels but avoid higher concentrations.
- Cholesterol avoidance is mediated by specific GRNs, some of which also respond to bitter substances.
- Five ionotropic receptor family members are crucial for cholesterol detection; disruption impairs avoidance.
- Two classes of cholesterol receptors, each with shared and unique IR subunits, were identified.
Conclusions:
- Fruit flies possess the capability to taste cholesterol through their gustatory system.
- Cholesterol detection is mediated by specific GRNs expressing particular ionotropic receptors.
- This study elucidates the molecular basis of cholesterol sensing in insects.
Related Concept Videos
01:14Conditioned Taste Aversion
106
Conditioned taste aversion, also known as sauce béarnaise syndrome, is a phenomenon in which an individual develops an aversion to a certain food taste following a negative experience, typically illness. This form of aversion is a type of classical conditioning in which the taste of the food (conditioned stimulus, CS) is associated with the experience of illness (unconditioned stimulus, UCS).
A notable characteristic of conditioned taste aversion is that it often requires only a single...
A notable characteristic of conditioned taste aversion is that it often requires only a single...
106
01:18Lipids: Dietary Sources and Requirements
570
Lipids are an essential component of a balanced human diet. Triglycerides, which make up the majority of dietary lipids, are found in both saturated fats—commonly present in meat, dairy products, and certain tropical plants like coconut, and hydrogenated oils such as margarine and baking shortenings (trans fats)—and unsaturated fats, which are abundant in seeds, nuts, olive oil, and most vegetable oils. The main sources of cholesterol include egg yolks, various meats and organ...
570
01:29Cholesterol: Significance and Regulation
460
Although not a source of energy, cholesterol plays a significant role as a foundational structure for bile salts, steroid hormones, and vitamin D, as well as being a crucial component of plasma membranes. Approximately 15% of blood cholesterol is derived from our diet, with the remainder synthesized from acetyl CoA by the liver and intestines. Cholesterol is eliminated from the body through its conversion into bile salts, which are eventually discarded in the feces.
Considering cholesterol and...
Considering cholesterol and...
460
01:24The Physiology of Taste
3.6K
The perception of a salty flavor is facilitated by sodium ions within the oral salivary fluid. Upon consumption of a salty substance, salt crystals disassemble, leading to the liberation of its constituents—Na+ and Cl- ions. These ions subsequently dissolve into the salivary fluid present in the oral cavity. The external environment of the gustatory cells experiences an elevation in Na+ concentration, thereby establishing a potent concentration gradient. This gradient propels the...
3.6K
01:20Lipid-Lowering Drugs: Statins and Miscellaneous Agents
465
Hyperlipidemia, a medical condition often referred to as high cholesterol, is characterized by abnormally elevated levels of lipids in the bloodstream. When present in excess, these lipids, specifically cholesterol and triglycerides, can lead to serious health complications, often involving cardiovascular diseases. Illnesses like atherosclerosis, heart attacks, and pancreatitis have all been linked to untreated hyperlipidemia. This means controlling and regulating cholesterol and triglyceride...
465
01:20Taste Buds and Receptors
1.7K
Gustation, or the sense of taste, is intrinsically linked to the anatomical structures located on the tongue. This organ's surface, along with the entirety of the oral cavity, is adorned with stratified squamous epithelium. Evident on the tongue are elevated structures known as papillae (singular = papilla), which house the mechanisms for the transduction of gustatory stimuli. Four distinct types of papillae exist, each identified by their unique morphological attributes: the circumvallate,...
1.7K