Related Experiment Video
Updated: Jul 29, 2026
14:57
Preparation of Acute Hippocampal Slices from Rats and Transgenic Mice for the Study of Synaptic Alterations during Aging and Amyloid Pathology
Published on: March 23, 2011
93.9K
Food intake enhances hippocampal sharp wave-ripples
Ekin Kaya1, Evan Wegienka1, Alexandra Akhtarzandi-Das1
1Department of Psychology, University of Michigan, Ann Arbor, United States.
Elife
|April 14, 2025
Summary
Feeding enhances hippocampal sharp wave-ripples (SWRs), neural oscillations crucial for memory. This feeding-dependent SWR increase signals satiety and influences metabolic regulation via brain communication.
Area of Science:
- Neuroscience
- Metabolic Regulation
- Neuroendocrinology
Background:
- Energy metabolism is tightly regulated by the hypothalamus for homeostasis.
- The hippocampus, involved in memory, also plays a role in metabolic control.
- Hippocampal sharp wave-ripples (SWRs) influence glucose levels but their modulation by feeding is unknown.
Purpose of the Study:
- To investigate if recent feeding enhances hippocampal SWRs.
- To determine if feeding-dependent SWR modulation is communicated to metabolic regulatory centers.
- To explore the relationship between caloric intake and SWR activity.
Main Methods:
- Recorded SWRs from the dorsal CA1 region of the hippocampus in mice during sleep.
- Administered meals with varying caloric values before sleep recordings.
- Measured activity in lateral hypothalamic GABAergic neurons in response to SWRs.
Main Results:
- Sleep-dependent SWRs were significantly enhanced after food consumption.
- The degree of SWR enhancement correlated with the meal's caloric content.
- Lateral hypothalamic GABAergic neurons showed increased activity triggered by SWRs.
Conclusions:
- Satiety state modulates hippocampal SWRs, with enhanced activity after feeding.
- Hippocampal-lateral hypothalamic communication is a potential pathway for SWRs to influence metabolism and feeding behavior.
- This study reveals a novel link between hippocampal activity, satiety, and metabolic control.
Related Concept Videos
01:06Lipid Digestion
Lipids are large molecules that are generally not water-soluble. Since most of the digestive enzymes in the human body are water-based, there are specific steps the body must take to break down lipids and make them available for use.
01:06Primary Production
The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.
02:32Osmoregulation in Fishes
When cells are placed in a hypotonic (low-salt) fluid, they can swell and burst. Meanwhile, cells in a hypertonic solution—with a higher salt concentration—can shrivel and die. How do fish cells avoid these gruesome fates in hypotonic freshwater or hypertonic seawater environments?
00:55Microvilli
Microvilli are tiny finger-like projections found on the surface of certain cells. Their purpose is to increase the surface area of the cell's apical surface, resulting in more effective absorption or secretion of substances.
These microvilli are predominantly present in cells lining the small intestine, kidney tubules, and certain cells in the respiratory and reproductive systems. By significantly expanding the surface area of the cell membrane, microvilli enhance the cell's capacity to...
These microvilli are predominantly present in cells lining the small intestine, kidney tubules, and certain cells in the respiratory and reproductive systems. By significantly expanding the surface area of the cell membrane, microvilli enhance the cell's capacity to...
01:16Bioavailability Enhancement: Drug Solubility Enhancement
Bioavailability is a critical factor in determining a drug's effectiveness. It refers to the proportion of a drug that enters the circulation when introduced into the body and is, as a result, able to have an active effect. Enhancing bioavailability is essential for drugs with poor solubility, as it can significantly impact their therapeutic efficacy. Various methods are employed to increase the solubility of drugs, thereby enhancing their bioavailability.Micronization and nanonization are...
01:27Bioavailability Enhancement: Drug Permeability Enhancement
After oral administration, poor permeability often limits the rate at which drugs are absorbed through the intestinal epithelium. Enhancing drug permeability is crucial for effective therapy, and several strategies have been developed to overcome this challenge.One effective strategy involves the use of lipid-based formulations. These formulations enhance dissolution and solubility, targeting physiological mechanisms to increase drug absorption. This includes stimulating bile salt secretion,...