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Developmental changes of sugar occurrence and distribution in the rat submandibular and sublingual glands (1999)

Accili, D. ; Gabrielli, Maria Gabriella ; Menghi, Giovanna ; [et al.]

Springer

Anatomy and embryology 199 (1999), S. 113-123

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ISSN: 1432-0568

Keywords: Key words Morphogenesis ; Histochemistry ; Lectins ; Carbohydrates ; Salivary glands ; Rat

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Abstract The developmental expression of salivary glycoconjugates was investigated in the rat submandibular and sublingual glands by conventional and lectin histochemistry. By the time of the first differentiation of secretory structures, in spite of similar morphological features, a different histochemical reactivity was detected, accounting for a relevant content of neutral glycoconjugates in the submandibular gland and the occurrence of both neutral and acidic glycoconjugates in the sublingual one. The use of lectins allowed the main changes of secretory components to be noted around gestational day 18. DBA and WGA lectins seemed to act as pre- and post-natal development markers while Con A lectin was indicative of post-natal differentiation. Taken together, data from lectin histochemistry indicated the transitional occurrence of glycoconjugates, probably involved in temporally restricted functions, as well as the co-existence of different secretory components that might also reflect maturational changes of single products.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s004290050214

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Lectin binding and identification of sialic acid acceptor sugars in rabbit oviduct under hormone administration (1995)

Menghi, Giovanna ; Scocco, Paola ; Materazzi, Giovanni

New York, NY [u.a.] : Wiley-Blackwell

Microscopy Research and Technique 31 (1995), S. 488-496

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ISSN: 1059-910X

Keywords: Lectins ; Ampulla ; Isthmus ; Rabbit ; HCG ; Estradiol ; Life and Medical Sciences ; Cell & Developmental Biology

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Natural Sciences in General

Notes: Localization of individual glycosidic residues and sialic acid acceptor sugars was investigated by conjugated lectins in the rabbit oviduct under physiological hormonal conditions and human chorionic gonadotropin (HCG) administration. Ampulla and isthmus were found to exhibit lectin binding profiles typical of each hormonal stage. Two different sialylated glycomolecules were identified within the epithelial lining; in particular, sialoglycoconjugates characterized by the terminal sequence sialic acid-galactose were visualized in the secretory cells and the sialic acid-N-acetylgalactosamine terminal disaccharides were localized on both ciliated and secretory cells of the entire oviduct. Surface and cytoplasmic sialoglycoconjugates were also found to exhibit a differential behaviour inside the two oviduct tracts examined. Present findings further supported the idea that in ampulla and isthmus, the greatest modifications consequent to hormone treatment take place at different times. © 1995 Wiley-Liss, Inc.

Additional Material: 18 Ill.