Bmi-1 regulates mucin levels and mucin O-glycosylation in the submandibular gland of mice.

Bmi-1 regulates mucin levels and mucin O-glycosylation in the submandibular gland of mice.
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DOI:
10.1371/journal.pone.0245607
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发表时间:
2021
期刊:
影响因子:
3.7
通讯作者:
Yamakoshi K
Yamakoshi K
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Kameyama A;Nishijima R;Yamakoshi K

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粘蛋白是唾液粘液的主要成分,是一种富含O-葡聚糖修饰的大糖蛋白。存在于口腔组织表面的粘蛋白通过粘蛋白O-糖链选择性地附着在微生物表面,对维持口腔卫生有很大的贡献。然而,由于粘蛋白的复杂的物理化学性质,对控制粘蛋白基因表达的机制和参与糖基化的糖基转移酶基因的详细分析相对较少。使用支持分子矩阵电泳法(一种用于粘蛋白分析的方法)和没有多梳组蛋白BMI-1的基因敲除小鼠进行的分析表明,BMI-1通过抑制粘蛋白Smgc基因的表达来调节颌下腺中的粘蛋白水平,并且Bmi-1还通过抑制颌下腺中的糖基转移酶Gcnt3基因来调节粘蛋白O-糖基化。
Mucins, the major components of salivary mucus, are large glycoproteins abundantly modified with O-glycans. Mucins present on the surface of oral tissues contribute greatly to the maintenance of oral hygiene by selectively adhering to the surfaces of microbes via mucin O-glycans. However, due to the complex physicochemical properties of mucins, there have been relatively few detailed analyses of the mechanisms controlling the expression of mucin genes and the glycosyltransferase genes involved in glycosylation. Analysis performed using supported molecular matrix electrophoresis, a methodology developed for mucin analysis, and knockout mice without the polycomb group protein Bmi-1 revealed that Bmi-1 regulates mucin levels in the submandibular gland by suppressing the expression of the mucin Smgc gene, and that Bmi-1 also regulates mucin O-glycosylation via suppression of the glycosyltransferase Gcnt3 gene in the submandibular gland.
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