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Memory is categorized into three major systems: sensory memory, short-term memory (STM), and long-term memory (LTM). These systems differ in their capacity and the duration for which they can hold information. Sensory memory captures raw sensory input from the environment, holding it for just a few seconds or less. For example, on hearing a brief, loud sound, like a car horn honking, the sound seems to linger in the mind for a moment even after it stops. This is an instance of sensory memory...
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Working memory refers to a combination of components, including short-term memory and attention, that allow an individual to hold information temporarily as we perform cognitive tasks. It is an essential cognitive function that enables the execution of complex tasks such as problem-solving, comprehension, and reasoning. Unlike short-term memory, which simply involves the storage of information for a brief period, working memory involves the active manipulation and processing of this...
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Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
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Long-term memory is a relatively permanent type of memory, capable of storing vast amounts of information over extended periods. Its storage capacity is generally considered unlimited.
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Emotionally traumatic events often lead to memories that are exceptionally vivid and enduring, sometimes persisting with remarkable clarity throughout an individual's life. A classic example of this phenomenon is a person who survives a car accident. Even years later, they may recall every detail of the event with startling accuracy — the screeching of the tires, the jarring impact, and the acrid smell of burning rubber. Such vividness contrasts sharply with how an individual...
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Umbilical Cord Cell Therapy Improves Spatial Memory in Aging Rats.

Marianne Lehmann1,2, Maria F Zappa-Villar1,2, Mariana G García3

  • 1INIBIOLP-Pathology B, School of Medicine, National University of La Plata, Calles 60 y 120, 1900, La Plata, Argentina.

Stem Cell Reviews and Reports
|May 24, 2019
PubMed
Summary

Human umbilical cord perivascular cells (HUCPVCs) improved spatial memory in aged rats. Intracerebroventricular administration of these stem cells, including IGF-1 overexpressing variants, enhanced memory retention and learning ability in senile animal models.

Keywords:
Brain agingHippocampusSpatial memoryStem cellsUmbilical cord

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Area of Science:

  • Neuroscience
  • Regenerative Medicine
  • Stem Cell Biology

Background:

  • Adult stem cells show promise for brain regenerative medicine.
  • Senile animal models are crucial for studying age-related cognitive decline.
  • Intracerebroventricular (icv) delivery is a potential route for brain therapeutics.

Purpose of the Study:

  • To evaluate the efficacy of human umbilical cord perivascular cells (HUCPVCs) in improving spatial memory in senile rats.
  • To compare the effects of naïve HUCPVCs versus IGF-1 overexpressing HUCPVCs.
  • To investigate the distribution and integration of administered HUCPVCs in the brain.

Main Methods:

  • Senile female rats received icv injections of either naïve HUCPVCs, IGF-1 transgenic HUCPVCs, or no treatment (control).
  • Spatial memory and learning were assessed using a modified Barnes maze test, measuring time spent in target sectors.
  • Cell distribution was confirmed using fluorescence microscopy of Dil-labeled HUCPVCs in brain tissue.

Main Results:

  • HUCPVCs, both naïve and IGF-1 transgenic, significantly increased time spent in goal sectors, indicating improved spatial memory retention.
  • No significant changes in spatial memory were observed in the control group.
  • Fluorescence microscopy confirmed the presence of HUCPVCs in the brains of treated rats, primarily near ependymal cells.

Conclusions:

  • Intracerebroventricular administration of HUCPVCs can effectively enhance specific components of spatial memory in senile rats.
  • HUCPVCs, particularly those overexpressing IGF-1, represent a viable therapeutic strategy for age-related cognitive impairment.
  • The accessibility of HUCPVCs warrants further research into their potential for treating neurodegenerative diseases.