Abstract:
:Neoglycoproteins are readily available conjugates of a histochemically inert carrier protein and histochemically crucial carbohydrate moieties which are covalently attached to the carrier protein by chemical synthesis. Biotinylation renders these conjugates detectable in formalin-fixed, paraffin-embedded tissue sections of human lung cancer by standard staining protocols, thereby localizing endogenous receptors for carbohydrate moieties. Examination of 30 cases of main types of human lung cancer revealed the presence of alpha-fucosyl-, alpha-mannosyl-, and alpha-glucosyl-specific receptors in adenocarcinomas or epidermoid carcinomas with high positivity rates. The extent of the expression of receptors for alpha- and beta-galactosides appeared to be comparatively lower. Within the standard protocol, using a concentration of the biotinylated probes of 10 micrograms/mL, this panel of probes consistently failed to detect endogenous sugar receptors in ten cases of small cell anaplastic carcinoma of the lung. Whereas none of the sections from the tumor cases bound the sulfated fucan fucoidan, the accompanying inflammatory cells, especially the granulocytes, expressed receptors for the sulfated fucan. Pronounced labeling for macrophages was observed for the alpha-galactoside-specific probe, whereas no binding to inflammatory cells and pneumocytes was detectable for the beta-galactoside-specific probe. The results indicate that expression of endogenous receptors for neoglycoproteins may be useful in discriminating between small cell and non-small cell lung carcinoma and carcinomatous cells from accompanying inflammatory cells.
journal_name
Hum Patholjournal_title
Human pathologyauthors
Kayser K,Gabius HJ,Ciesiolka T,Ebert W,Bach Sdoi
10.1016/0046-8177(89)90045-2subject
Has Abstractpub_date
1989-04-01 00:00:00pages
352-60issue
4eissn
0046-8177issn
1532-8392pii
0046-8177(89)90045-2journal_volume
20pub_type
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