ISSN:
1432-1106
Keywords:
Retina
;
Larval tiger salamander
;
Neurotensin
;
Immunocytochemistry
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary Light microscopic immunocytochemistry was used to localize the populations of NT-like immunoreactive amacrine cells in the larval tiger salamander retina. Seventy-nine percent of NT-immunostained cells observed in transverse cryo-prepared sections were classified as Type 1 amacrine cells. Another 6% were classified as Type 2 amacrine cells, while 15% of the NT-cells had their cell bodies situated in the ganglion cell layer and were tentatively designated as displaced amacrine cells. Each type of NT-like immunoreactive cell was observed in the central and peripheral retina. NT-immunostained processes were observed to ramify in sublayers 3 and 5 of the inner plexiform layer. An examination of retinal whole mounts revealed that NT-amacrine cells were distributed throughout the center and periphery of the retina at a density of 82 ± 24 cells/ mm2. The dendritic fields of NT-immunostained amacrine and displaced amacrine cells were observed to be either symmetrically or asymmetrically distributed about their somas. Symmetrical dendritic fields were generally oval-shaped and ranged in diameter from 250 to 500 μm (major axis) by 150 to 250 μm (minor axis). Asymmetrical dendritic fields were observed to encompass one-half or less of an imaginary circle surrounding their soma of origin and were orientated in all directions. The processes forming asymmetrical dendritic fields ranged from 75 to 260 μm in length. Furthermore, partial overlap was often observed between the dendritic fields of adjacent NT-amacrine cells.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00271844
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