Cell shape modulation alters glycosylation of a metastatic melanoma cell‐surface antigen

Cell shape modulation alters glycosylation of a metastatic melanoma cell‐surface antigen
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细胞形状调节改变转移性黑色素瘤细胞表面抗原的糖基化

DOI:
10.1002/ijc.2910400319
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发表时间:
1987
影响因子:
6.4
通讯作者:
A. Raz
A. Raz
中科院分区:
医学1区
文献类型:
--
作者:
I. Nabi;A. Raz

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与单层培养的细胞相比,在非粘附性基质上以球状体形式体外培养的B16-F1黑色素瘤细胞在体内以可逆方式获得肺定植增加。在神经氨酸酶处理蛋白印迹后,球状细胞表达了125 I标记的花生凝集素(PNA)与Mr 78,000(gp 78)的独特糖蛋白的结合增加,该糖蛋白在去唾液酸化后在SDS-聚丙烯酰胺凝胶中迁移为Mr 86,000蛋白。针对在PNA-Sepharose上纯化的该糖蛋白产生抗体,并证明其在活B16-F1细胞表面上的表达。B16-F1黑色素瘤细胞在悬浮液中的生长与gp 78糖基化的改变有关,这可能与这些细胞的转移能力增加有关。在将B16-F1细胞注射到同系小鼠尾静脉之前,用抗gp 78 Fab片段体外处理B16-F1细胞,导致肿瘤肺集落的出现增加2倍。
B16‐F1 melanoma cells cultivated in vitro as spheroids on a non‐adhesive substrate acquire in a reversible fashion an increase in lung colonization in vivo as compared to cells cultured as a monolayer. After neuraminidase treatment of protein blots, the spheroidal cells expressed an increased binding of 125I‐labelled peanut lectin (PNA) to a unique glycoprotein of Mr78,000 (gp78) which after desialylation migrated in SDS‐polyacrylamide gels as an Mr86,000 protein. Antibodies were generated against this glycoprotein purified on PNA‐Sepharose and its expression on the surface of viable B16‐F1 cells was demonstrated. Growth of B16‐F1 melanoma cells in suspension is associated with the altered glycosylation of gp78 which may be related to the increased metastatic ability of these cells. In vitro treatment of B16‐F1 cells with anti‐gp78 Fab fragments prior to their injection into the tail veins of syngeneic mice resulted in a 2‐fold increase in the appearance of tumor lung colonies.
从人黑色素瘤细胞质膜中分离和部分表征粘蛋白型糖蛋白。
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DOI: --
发表时间: 1986
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