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Differences in Lectin Binding in Squamous Metaplasia Induced by Benzo(a)pyrene and Vitamin A Deficiency in Hamster Tracheal Explants

Dharam P. Chopra and Avarachan P. Joiakim
In Vitro Cellular & Developmental Biology
Vol. 27A, No. 3, Part 1 (Mar., 1991), pp. 223-228
Stable URL: http://www.jstor.org/stable/4296634
Page Count: 6
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Differences in Lectin Binding in Squamous Metaplasia Induced by Benzo(a)pyrene and Vitamin A Deficiency in Hamster Tracheal Explants
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Abstract

Epidermoid metaplasia in the hamster trachea can be produced by treatment with benzo(a)pyrene (BP) or vitamin A deficiency. To elucidate distinguishing features of the two types of lesions, lectin binding to tissue sections of tracheal explants exhibiting metaplastic lesions was assessed. In squamous metaplasia induced by vitamin A deficiency, Dolichos biflorus agglutinin (DBA), wheat germ agglutinin (WGA), and peanut agglutinin (PNA) showed faint (+) to moderate (++) binding in both basal and suprabasal cells; Concanavalin A (Con A) showed moderate binding (++) to suprabasal cells and no binding in basal cells. In the BP-induced lesions, PNA and WGA bound intensely (++++,+++, respectively) in basal cells and faintly (+) to moderately (++) in suprabasal cells. The staining seemed to be predominant at the periphery of the cells. Further, the intensity of PNA and WGA staining increased significantly after the neuraminidase treatment. DBA and Con A showed faint (+) to moderate (++) binding in the BP-induced metaplasia. The results show that in BP-induced metaplasia, ceDs in the basal region show preferential binding of PNA and WGA.

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