# MEP glia share molecular features with oligodendrocytes while maintaining a distinct hybrid signature

## TL;DR

MEP glia have a unique mix of traits similar to oligodendrocytes but maintain a distinct identity in the spinal cord and peripheral nerves.

## Contribution

The study identifies specific molecular markers that distinguish MEP glia from oligodendrocytes.

## Key findings

- MEP glia express olig2 and nkx2.2a but not olig1 and plp1b.
- MEP glia show a hybrid identity with features of oligodendrocytes and Schwann cells.
- Findings clarify the molecular signature of MEP glia.

## Abstract

Motor Exit Point (MEP) glia are spinal cord-derived glial cells that myelinate peripheral motor axons, bridging the central and peripheral nervous systems. They have a hybrid profile, sharing features with oligodendrocytes and Schwann cells. Yet, significant gaps remain in our understanding of complex MEP glial lineage and identity. MEP glia express neural tube and canonical oligodendrocyte lineage markers
olig2
and
nkx2.2a
, as well as the neural crest marker
foxd3
. Here, we show that the oligodendrocyte markers
olig1
and
plp1b
are not expressed in MEP glia. These findings refine the molecular signature of MEP glia, enhancing their peripheral identity.