# UNC-52 localization with respect to longitudinal axon tracts in the ventral and dorsal nerve cords in C. elegans

## TL;DR

This study investigates the localization of UNC-52 in C. elegans and its role in axon navigation and dendritic branching in neurons.

## Contribution

The paper reveals that UNC-52 is absent from the basement membranes around axon tracts in C. elegans.

## Key findings

- UNC-52 is localized underneath muscle cells but not around axon tracts in the ventral and dorsal nerve cords.
- The absence of UNC-52 in axon tract basement membranes occurs at all developmental stages.
- UNC-52 is not required for the BM surrounding axon tracts in C. elegans.

## Abstract

UNC-52
/Perlecan is a core basement membrane (BM) component essential for connecting muscle cells to overlying hypodermal cells. In the nervous system of

C. elegans

,

unc-52
(
ra515
)

causes dendritic branching defects in the PVD neuron independent of muscle attachment defects. We found that

unc-52
(
ra515
)

also causes axon navigation defects in the ventral nerve cord (VNC). We then examined the localization of
UNC-52
with respect to ventral and dorsal nerve cord (DNC) axon tracts. We found that
UNC-52
is localized underneath muscle cells as previously observed but is absent from BMs surrounding ventral and dorsal axon tracts at all stages of development.