This work continues the studies of the proliferative ability of cells in the adult newt retina. The model of experimental detachment of the retina from pigment epithelium and two techniques to saturate the ocular tissues in vivo with precursors of DNA synthesis were used: (1) the method of repeated [3H]-thymidine labeling and subsequent autoradiographic analysis of semithin sections and (2) an original method for continuous labeling of thymidine analog bromodeoxyuridine and subsequent immunochemical detection. The data obtained confirm and extend our previous data on the localization of DNA-synthesizing cells in the neural retina and expose the pattern of S-phase cell accumulation after retinal detachment for each proliferation-competent cell population. In addition to cells in the growth zone of the retina, Muller glia, microglia, and minor cell population in the vitreal part of interneurons, DNA-synthesizing cells included astrocytes of the optic nerve and cells of its vascular network. Four weeks after detachment, the number of S-phase cells in the growth zone could reach 15–20%, while the above-mentioned DNA-synthesizing cells in the differentiated retina have low reproductive rate and could produce only one generation within the same period.
Russian Journal of Developmental Biology – Springer Journals
Published: Mar 25, 2011
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