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The massed-spaced learning effect in non-neural human cells.

N V Kukushkin^1,2, R E Carney³, T Tabassum³

¹Liberal Studies, New York University, New York, NY, 10003, USA. nk59@nyu.edu.

Nature Communications

|November 7, 2024

Summary

This summary is machine-generated.

Memory

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Area of Science:

Cellular Biology
Neuroscience
Molecular Biology

Background:

The massed-spaced effect, a key aspect of memory formation, is typically studied in neural systems.
Canonical memory features are thought to rely on complex neural circuitry.

Purpose of the Study:

To investigate if memory-like effects, specifically the massed-spaced effect, can occur in non-neural cell lines.
To determine if conserved molecular signaling cascades can exhibit memory-like properties.

Main Methods:

Utilized two non-neural, immortalized cell lines with a CREB-dependent luciferase reporter.
Emulated training using repeated pulses of forskolin and/or phorbol ester.
Measured luciferase expression and activation of ERK and CREB as memory proxies.

Main Results:

Spaced agonist pulses produced stronger and more sustained luciferase expression compared to massed pulses.
Spaced training led to enhanced activation of ERK and CREB.
Inhibiting ERK or CREB abolished the massed-spaced effect.

Conclusions:

Fundamental features of memory, like the massed-spaced effect, are not exclusive to neural circuits.
The dynamics of conserved signaling cascades in cell types can underlie memory-like phenomena.
This suggests a broader biological basis for memory beyond neuronal networks.