Transient expression of adheron molecules during chick retinal development

Ho‐Ching Tiffany Tsui, Whitney B. Pope, Chong S. Kim, William L Klein*

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Neuritogenesis and synapse formation are transient phenomena mediated in part by filopodial attachments (Tsui, Lankford, and Klein, Proc. Natl. Acad. Sci. 82:8256–8260 1985). These attachments can be labeled by antisera against adherons, adhesive microparticles isolated from cell culture media (Tsui, Schubert, and Klein, J. Cell Biol. 106:2095–2108 1988). Here, two monoclonal antibodies raised against adherons have been found to recognize transiently expressed membrane antigens of developing avian retina. Early in development, monoclonal antibody (mAb) AD1 stained antigens that spanned the entire tissue. With time, immunoreactivity became restricted to optic fiber, ganglion cell, and inner plexiform layers. Immunoblots of embryonic day (E) 13 retina showed a broad band at 66–72 kD for particulate fractions and a fine band at 70 kD for suluble fractions. The particulate forms disappeared as retinas matured, but the soluble form did not. mAb AD2 initially labeled retina antigens of optic fiber, ganglion cell, and inner plexiform layers (IPL). Labeling in the plexiform layer showed discrete lamina. Immunoreactivity first appeared at E9, peaked at E15, and then disappeared shortly after hatching. In isolated cells, AD2 labeled small cell surface aggregates. Cytoarchitectural studies, using whole mount transmission electron microscopy, showed AD2 antigen in cell surface microfilaments, including some that joined filopodia together. The adheron antigens recognized by mAbs AD1 and AD2 thus were (1) topographically restricted; (2) associated with cell surfaces; and (3) developmentally down‐regulated. This pattern suggests a role in developmentally transient cell surface phenomena, such as neurite extension or junction biogenesis. © 1992 John Wiley & Sons, Inc.

Original languageEnglish (US)
Pages (from-to)720-738
Number of pages19
JournalJournal of Neurobiology
Volume23
Issue number6
DOIs
StatePublished - Jan 1 1992

Keywords

  • adhesion
  • growth cone
  • monoclonal
  • neurite
  • synaptogenesis

ASJC Scopus subject areas

  • Neuroscience(all)
  • Cellular and Molecular Neuroscience

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