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Characterization of Corpora Amylacea Glycoconjugates in Normal and Hyperplastic Glands of Human Prostate

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Summary

It has been shown that there are sugars in corpora amylacea, but little attention has been focused on the expression of glycoconjugates in corpora amylacea of normal and hyperplastic prostatic glands. The present study characterizes and compares the expression of glycoconjugates in corpora amylacea of normal and hyperplastic prostatic glands of elderly men by using alcian blue (AB) stain and lectin histochemistry. Corpora amylacea were larger and more numerous in hyperplastic glands compared to normal glands. The stain with AB revealed the presence of sulfated and carboxyl components in corpora amylacea. In hyperplastic prostatic glands the sulfur and acid contents of corpora amylacea were increased. Lectin affinities of corpora amylacea from normal prostatic glands demonstrated the presence of fucose, mannose, sialic acid, N-acetyl galactosamine and N-acetyl glucosamine residues. In the hyperplastic glands the lectin binding pattern of corpora amylacea was qualitatively similar to normal glands, but an increase in GalNAc, sialic acid, mannose and fucose residues was observed. Normal prostatic glands showed a weak to moderate content of mannose residues, and in contrast a strong GNA and Con-A staining was observed in hyperplastic glands. MAA and SNA affinities indicated that the content of sialic acid residues was higher in hyperplastic glands compared with normal prostatic glands. Also NAcGal residues were increased in hyperplastic glands. Luminal secretion, secretory cells and apical border of epithelium showed a similar although more intense Lectin-binding pattern as compared with corpora amylacea both in normal and hyperplastic prostatic glands. Lectin histochemistry shows that the glycoconjugates expressed in the glandular epithelium are similar to those found in corpora amylacea both in normal and hyperplastic glands. In addition, in hyperplastic glands, where the corpora amylacea are higher in size and more numerous, the reaction to lectins is more intense especially with mannose and sialic acid residues. The results suggest that corpora amylacea are originated at least in part from prostatic secretion.

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Authors and Affiliations

  1. Department of Cellular Biology, Medical School, Aging Institute, University of Murcia, Espinardo, 30100, Murcia, Spain

    Eva Morales, Luis A. Polo, Luis M. Pastor, Adelina Zuasti & Concepción Ferrer

  2. Service of Pathology, University Hospital Virgen de la Arrixaca, Murcia, Spain

    Luis A. Polo

  3. Department of Morphology, School of Medicine, Autonomous University of Madrid, 28029, Madrid, Spain

    Luis Santamaría

  4. Division of Oncology, Center for Applied Medical Research (CIMA), and Department of Histology and Pathology, University of Navarra, Pamplona, Spain

    Alfonso Calvo

Authors
  1. Eva Morales
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  2. Luis A. Polo
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  3. Luis M. Pastor
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  4. Luis Santamaría
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  5. Alfonso Calvo
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  6. Adelina Zuasti
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  7. Concepción Ferrer
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Correspondence to Luis M. Pastor.

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Morales, E., Polo, L.A., Pastor, L.M. et al. Characterization of Corpora Amylacea Glycoconjugates in Normal and Hyperplastic Glands of Human Prostate. J Mol Hist 36, 235–242 (2005). https://doi.org/10.1007/s10735-005-5784-z

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  • DOI: https://doi.org/10.1007/s10735-005-5784-z

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