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01-09-2018 | Original Article

Gastric gland mucin-specific O-glycan expression decreases as tumor cells progress from lobular endocervical gland hyperplasia to cervical mucinous carcinoma, gastric type

Authors: Kazuhiro Yamanoi, Keiko Ishii, Michihiko Tsukamoto, Shiho Asaka, Jun Nakayama

Published in: Virchows Archiv | Issue 3/2018

Abstract

Gastric gland mucin-specific O-glycans are unique in having α1,4-linked N-acetylglucosamine (αGlcNAc) attached to MUC6. We previously reported decreased expression of αGlcNAc relative to MUC6 in gastric and pancreatic neoplasms, but its significance in cervical glandular lesions remained unclear. Here, we analyzed MUC5AC, MUC6, αGlcNAc, and p16 expression in 9 lesions of mucinous carcinoma, gastric type with minimal deviation adenocarcinoma (GAS-MDA), 5 of GAS with nonMDA (GAS-nonMDA), 14 of typical lobular endocervical gland hyperplasia (LEGH), and 5 of atypical LEGH (33 total lesions). All 33 were MUC5AC-positive. Moreover, all 14 typical LEGH, 5 atypical LEGH, 8 of 9 GAS-MDA, and 3 of 5 GAS-nonMDA were MUC6-positive. All 14 typical LEGH, 2 of 5 atypical LEGH, 3 of 9 GAS-MDA, and 1 of 5 GAS-nonMDA were αGlcNAc-positive. The proportion of αGlcNAc-positive atypical LEGH or GAS-MDA or GAS-nonMDA lesions was significantly smaller than that seen in typical LEGH lesions (P < 0.001 and P < 0.01, respectively). Of 33 lesions, 32 were p16-negative. Furthermore, when we evaluated MUC6 and αGlcNAc immunoreactivity semi-quantitatively in all 33 lesions, in typical LEGH and GAS-MDA, the immunohistochemical score for αGlcNAc was significantly lower than that for MUC6 (P < 0.01). We did not observe significantly decreased αGlcNAc expression relative to MUC6 in typical LEGH lesions. These studies suggest that αGlcNAc expression decreases as typical LEGH progresses to GAS. Given the difficulty in distinguishing MDA and atypical LEGH from typical LEGH in H.E. staining, we propose that immunohistochemical analysis of αGlcNAc and MUC6 could be useful.

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Title: Gastric gland mucin-specific O-glycan expression decreases as tumor cells progress from lobular endocervical gland hyperplasia to cervical mucinous carcinoma, gastric type
Authors: Kazuhiro Yamanoi
Keiko Ishii
Michihiko Tsukamoto
Shiho Asaka
Jun Nakayama
Publication date: 01-09-2018
Publisher: Springer Berlin Heidelberg
Published in: Virchows Archiv / Issue 3/2018
Print ISSN: 0945-6317
Electronic ISSN: 1432-2307
DOI: https://doi.org/10.1007/s00428-018-2381-6

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Gastric gland mucin-specific O-glycan expression decreases as tumor cells progress from lobular endocervical gland hyperplasia to cervical mucinous carcinoma, gastric type

Abstract

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Abstract

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