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Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...
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Absorption refers to taking dietary nutrients from the intestinal lumen for transportation throughout the body. After digestion in the small intestine, carbohydrates, proteins, and fats are broken down into simpler forms. These essential macronutrients and other vital substances, such as vitamins, minerals, and water, are then prepared for absorption into the bloodstream.
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Symbiotic Supplementation (

Alejandra Romo-Araiza1, Rocío I Picazo-Aguilar1, Ernesto Griego2

  • 1Centro de Investigación en Ciencias de la Salud (CICSA), Facultad de Ciencias de la Salud, Universidad Anáhuac México, Huixquilucan, México.

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Symbiotics supplementation improved memory and brain function in rats fed high-fat, high-sugar diets. This intervention boosted butyrate levels, neurogenesis, and synaptic plasticity, counteracting obesity-related cognitive decline.

Keywords:
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Area of Science:

  • Neuroscience
  • Microbiology
  • Nutrition Science

Background:

  • Obesity is linked to cognitive impairment via systemic inflammation.
  • High-fat, high-sugar diets (HFSDs) induce inflammation and gut dysbiosis.
  • Gut microbiome alterations may impact brain health and memory.

Purpose of the Study:

  • To investigate the effects of symbiotic supplementation on cognitive function in HFSD-fed rats.
  • To assess changes in butyrate concentration, neurogenesis, and hippocampal electrophysiology.
  • To determine if symbiotics can mitigate obesity-associated memory deficits.

Main Methods:

  • Rats were fed HFSD for 10 weeks, then supplemented with symbiotics (Enterococcus faecium + inulin) or water for 5 weeks.
  • Cognitive function was evaluated using the Morris Water Maze (spatial memory) and Eight-Arm Radial Maze (working memory).
  • Fecal butyrate levels, hippocampal neurogenesis, and neuronal electrophysiology were analyzed.

Main Results:

  • Symbiotic-supplemented rats exhibited significantly improved spatial and working memory.
  • Increased fecal butyrate concentrations and enhanced hippocampal neurogenesis were observed.
  • Electrophysiological studies revealed increased hippocampal neuron firing frequency and a higher NMDA/AMPA current ratio, indicating improved synaptic plasticity.

Conclusions:

  • Symbiotic supplementation can restore memory impairment associated with obesity.
  • This intervention promotes neurogenesis and enhances synaptic plasticity in the hippocampus.
  • Symbiotics represent a potential therapeutic strategy for cognitive dysfunction linked to metabolic disorders.