# Ceramide Synthase HYL-2 is Required for Neural Preconditioning to Anoxia in Caenorhabditis elegans

## TL;DR

This study shows that a specific gene, HYL-2, is important for protecting neurons in worms when they are exposed to low oxygen conditions.

## Contribution

The study identifies HYL-2 as a ceramide synthase required for neural preconditioning in C. elegans under anoxia.

## Key findings

- Loss of the HYL-2 gene reduces survival in C. elegans under anoxia.
- HYL-2 functions upstream in the neural preconditioning pathway.
- Neural preconditioning increases survival to anoxia in C. elegans.

## Abstract

Oxygen is vital for neuron development and function, and low oxygen (hypoxia) or 0% oxygen available (anoxia) conditions lead to neuronal dysfunction and death. Nonlethal forms of stress, prior to hypoxic or anoxic (preconditioning) environments protects neurons and increases survival to oxygen deprivation. Hyperpolarization of
C. elegans
neurons prior to anoxia (neural preconditioning) increases survival, but the cellular and molecular pathways that confer survival are unclear. Here we report that loss in ceramide synthase gene,

hyl-2

suppresses increased survival to anoxia in neural preconditioned animals, suggesting that
HYL-2
functions upstream of the circuit that regulates neural preconditioning.