An extracellular biochemical screen reveals that FLRTs and Unc5s mediate neuronal subtype recognition in the retina.

Published online

Journal Article

In the inner plexiform layer (IPL) of the mouse retina, ~70 neuronal subtypes organize their neurites into an intricate laminar structure that underlies visual processing. To find recognition proteins involved in lamination, we utilized microarray data from 13 subtypes to identify differentially-expressed extracellular proteins and performed a high-throughput biochemical screen. We identified ~50 previously-unknown receptor-ligand pairs, including new interactions among members of the FLRT and Unc5 families. These proteins show laminar-restricted IPL localization and induce attraction and/or repulsion of retinal neurites in culture, placing them in an ideal position to mediate laminar targeting. Consistent with a repulsive role in arbor lamination, we observed complementary expression patterns for one interaction pair, FLRT2-Unc5C, in vivo. Starburst amacrine cells and their synaptic partners, ON-OFF direction-selective ganglion cells, express FLRT2 and are repelled by Unc5C. These data suggest a single molecular mechanism may have been co-opted by synaptic partners to ensure joint laminar restriction.

Full Text

Duke Authors

Cited Authors

  • Visser, JJ; Cheng, Y; Perry, SC; Chastain, AB; Parsa, B; Masri, SS; Ray, TA; Kay, JN; Wojtowicz, WM

Published Date

  • December 2, 2015

Published In

Volume / Issue

  • 4 /

Start / End Page

  • e08149 -

PubMed ID

  • 26633812

Pubmed Central ID

  • 26633812

Electronic International Standard Serial Number (EISSN)

  • 2050-084X

Digital Object Identifier (DOI)

  • 10.7554/eLife.08149

Language

  • eng

Conference Location

  • England