QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

HOME  |   SEARCH  |   ARCHIVE  |   SUBSCRIBE  |   CONTACT  |   HELP

This Article Full Text (PDF) Submit an eLetter Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Montague, P. R. Articles by Friedlander, M. J. Search for Related Content PubMed PubMed Citation Articles by Montague, P. R. Articles by Friedlander, M. J.

 Previous Article  |  Next Article 

Journal of Neuroscience, Vol 11, 1440-1457, Copyright © 1991 by Society for Neuroscience

ARTICLE

Morphogenesis and territorial coverage by isolated mammalian retinal ganglion cells

PR Montague and MJ Friedlander
Neurobiology Research Center, University of Alabama, Birmingham 35294.

Identified retinal ganglion cells were isolated from postnatal cat retinas and their dendrites were removed by trituration and centrifugation. The denuded cells were placed in a cell culture system and allowed to reexpress dendritic arbors in the absence of afferent input, target tissue, and interactions with neighboring ganglion cells. The retinal ganglion cells were grown above a feeder layer of astrocytes on glass coverslips equipped with paraffin pedestals. The spatial patterns of the reexpressed neurites were quantitatively analyzed using a number of measures, including an estimate of the Hausdorff dimension, H, which was used as a scale-independent metric for how well the neurite patterns filled in a restricted spatial domain. As assessed by the estimation of the Hausdorff dimensions, the neurites from a single cell achieve uniform coverage of a restricted territory independent of the total neurite length or the total number of inter-branch-point segments. A comparison with H values of ganglion cells from the intact retina revealed a similar trend. These results suggest that these cultured ganglion cells can express an intrinsic growth strategy for the uniform coverage of a restricted territory. The arbors expressed in the culture system displayed a limited range of diameters and exhibited morphology similar to the alpha-, beta-, and gamma-ganglion cells of the intact retina in the absence of afferent input or the influences of neighboring cells and target tissue. Time- lapse video data revealed that individual cultured cells showed extensive dendritic remodeling during their growth; however, after about 3 d in culture, this remodeling did not appreciably affect the territorial coverage of a cell. In the intact retina, the existence of dendritic sheets that independently and uniformly sample visual space may result from this intrinsic ability to elaborate dendrites that uniformly cover or fill in a restricted territory.

This article has been cited by other articles:

				A. Philippides, S. R. Ott, P. Husbands, T. A. Lovick, and M. O'Shea Modeling Cooperative Volume Signaling in a Plexus of Nitric Oxide Synthase-Expressing Neurons J. Neurosci., July 13, 2005; 25(28): 6520 - 6532. [Abstract] [Full Text] [PDF]

				B. Lom, J. Cogen, A. L. Sanchez, T. Vu, and S. Cohen-Cory Local and Target-Derived Brain-Derived Neurotrophic Factor Exert Opposing Effects on the Dendritic Arborization of Retinal Ganglion Cells In Vivo J. Neurosci., September 1, 2002; 22(17): 7639 - 7649. [Abstract] [Full Text] [PDF]

				H. Wang and E. R. Macagno The Establishment of Peripheral Sensory Arbors in the Leech: In Vivo Time-Lapse Studies Reveal a Highly Dynamic Process J. Neurosci., April 1, 1997; 17(7): 2408 - 2419. [Abstract] [Full Text] [PDF]

				W. Guido, F.-S. Lo, and R. S. Erzurumlu An In Vitro Model of the Kitten Retinogeniculate Pathway J Neurophysiol, January 1, 1997; 77(1): 511 - 516. [Abstract] [Full Text] [PDF]

Home  |   Search  |   Archive  |   Subscribe  |   Contact  |   Help