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人胚胎早中期肠壁黏膜层发育分化的研究
Authors
刘琳
周国民
+6 more
张文忻
李永平
林健贤
蒋新华
郑健梁
钟秀风
Publication date
1 January 2006
Publisher
Editorial Office of Journal of Sun Yat-sen University
Abstract
【目的】研究人胚胎早中期肠壁黏膜层及黏膜上皮杯状细胞的发育。【方法】采用形态学、组化及联合组化和免疫组化等方法对27例4-28周胚胎空肠、回肠及结肠肠壁黏膜层的发育进行观察。【结果】黏膜上皮PAS阳性的杯状细胞在10周时已经出现,爱茜蓝阳性的杯状细胞在12周出现;空肠、回肠的黏膜肌层在10周时已开始形成,起源于黏膜下层的肌肉干细胞,此后,随着胎龄的增加,杯状细胞的数目增加。黏膜肌层α—SMA阳性的细胞逐渐增多。【结论】肠黏膜上皮杯状细胞在10周时开始发育,可分为4类:①含中性黏多糖的杯状细胞;②含酸性黏多糖的杯状细胞;③既含中性黏多糖又含酸性黏多糖的杯状细胞;④既不含中性黏多糖也不含酸性黏多糖的杯状细胞。黏膜肌层起源于黏膜下层的肌肉干细胞
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Last time updated on 16/10/2024