Pre- and post-critical period induced reduction of Cat-301 immunoreactivity in the lateral geniculate nucleus and visual cortex of cats Y-blocked as adults or made strabismic as kittens

Zheng Qin Yin, Sheila G Crewther, Chun Wang, David P Crewther

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16 Citations (Scopus)

Abstract

PURPOSE: To test the post-critical period stability of perineuronal nets by comparing the expression of antigens on aggrecan (a chondroitin sulfate proteoglycan (CSPG) recognized by the monoclonal antibody Cat-301) in the lateral geniculate nucleus (LGN) and striate cortex (A17) of adult Y-blocked cats and cats made strabismic and amblyopic as kittens. The comparison tested the idea that pre- and post-critical period loss of synchronous activity would differentially affect the perineuronal net of Y-type neurons in LGN and A17. METHODS: Seven adult cats, two normal, three convergent strabismic amblyopic, and two monocularly Y-blocked cats, were used in this study. The strabismic amblyopic cats had been made monocularly esotropic (by tenotomy) at 14 days of age. The Y-block was created acutely by a pressure cuff placed on the optic nerve behind the left eye in adult cats. The efficacy of both procedures was tested electrophysiologically. Frontal frozen sections were incubated with the Cat-301 antibody and the labeling visualized using a DAB kit. The sections were counterstained with cresyl violet. In each section, Cat-301-stained cells with well-defined nucleoli were counted under a 20x objective with a computer-based quantitative microscope image analysis system. RESULTS: The percentage of positively labeled cells was...
Original languageEnglish
Pages (from-to)858 - 866
Number of pages9
JournalMolecular Vision
Volume12
Publication statusPublished - 2006
Externally publishedYes

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