# Hormone-switching islet cells: parallels to transmitter-switching neurons

## TL;DR

The paper explores how hormone-switching in islet cells is similar to neurotransmitter-switching in neurons, suggesting a shared ancient mechanism.

## Contribution

The paper proposes a novel connection between hormone-switching in islet cells and neurotransmitter-switching in neurons.

## Key findings

- Pancreatic islet cells and neurons share physiological and molecular similarities.
- Hormone-switching in islet cells and transmitter-switching in neurons may reflect an ancient molecular circuit of cell plasticity.
- Comparing these phenomena could reveal insights into their functions and mechanisms.

## Abstract

Although originating from different germ layers, pancreatic islet cells and neurons share extensive similarities, both physiological (e.g., voltage-dependent release of a bioactive molecule) and molecular (e.g., highly similar composition of transcription factors and structural genes). Here we propose that two seemingly unrelated phenomena recognized in these cell types—neurotransmitter switching in neurons and the expression of two or more hormones in individual islet cells—share a deep resemblance, potentially reflecting an ancient molecular circuit of cell plasticity. Comparing and contrasting dynamic hormone expression in islet cells and transmitter switching in neurons may provide insights into the functions and underlying mechanisms of these phenomena.