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Decrease of DNA per cell during development of the lens in chickens
Authors:A. Yamamoto  T. Araki  M. F. Counis
Affiliation:(1) Department of Anatomy, School of Medicine, The University of Tokushima, 770 Tokushima, Japan;(2) Department of Precision Mechanics, Faculty of Engineering, The University of Tokushima, 770 Tokushima, Japan;(3) Unite de Recherches Gerontologiques, U.118 INSERM, Rue Wilhem, 75016 Paris, France
Abstract:Summary Developmental changes in the amount and conformation of DNA in chicken lens were studied. For this, DNA in situ in lens fiber cell nuclei of chickens was examined by microfluorometry with Hoechst 33258 (Hoe) fluorochrome. On 1 M NaCl-aided Hoe staining, by which the amount of DNA can be determined accurately, the fluorescence intensity of lens fiber cells was found to decrease with no change in that of the lens epithelial cells during development. On the contrary, on normal NaCl-free Hoe staining the fluorescence intensity of the lens cells was found to increase gradually during development. These results suggest that during development the amount of DNA in lens fiber cells decreases in association with some change in its conformation.
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