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Dev Growth Differ
1995 Apr 01;372:211-220. doi: 10.1046/j.1440-169X.1995.t01-1-00010.x.
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Characterization of metamorphic changes in anuran larval epidermis using lectins as probes.
Amano T
,
Kawabata H
,
Yoshizato K
.
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The skin of an adult frog of Xenopus laevis was characterized by the reactivity of 20 lectins. The lectins were classified into six groups in their binding to the epidermal cells: Lycopersicon esculentum lectin (LEL)-type which was positive for all epidermal cells; Pisum sativum agglutinin (PSA)-type for stratum germinativum; succinylated wheat germ agglutinin (sWGA)-type for strata spinosum, granulosum and corneum; Dolichos biflorus agglutinin (DBA)-type for strata germinativum and spinosum; peanut agglutinin (PNA)-type for stratum spinosum; and Ulex europaeus agglutinin (UEA-I)-type for strata granulosum and corneum. PSA and sWGA were utilized as markers of mitotically active germinative cells and the differentiated cells of the epidermis, respectively, to describe the metamorphic conversion of larval epidermal cells to adult type. PSA stained all epidermal cells of tadpoles before metamorphic climax. At the end of metamorphosis, PSA-positive cells were restricted to cells in the basal layer of body epidermis while all the tailepidermis remained PSA-positive. The other cell marker, sWGA, only stained apical cells in tadpoleepidermis. During the metamorphic climax, sWGA-positive cells appeared in the cells beneath the stratum corneum of the body region, but not in the tail region. The present study demonstrates that PSA and sWGA are useful to investigate metamorphic changes in tadpole epidermal cells.
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