EXPRESSION OF FIBRONECTIN, FIBRONECTIN ISOFORMS AND INTEGRIN RECEPTORS IN MELANOCYTIC LESIONS

被引:44
作者
NATALI, PG
NICOTRA, MR
DIFILIPPO, F
BIGOTTI, A
机构
[1] REGINA ELENA INST CANC RES,I-00161 ROME,ITALY
[2] CNR,INST BIOMED TECHNOL,I-00161 ROME,ITALY
关键词
FIBRONECTIN; INTEGRIN; MELANOMA;
D O I
10.1038/bjc.1995.240
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
In vitro studies have demonstrated that fibronectin (FN) can deliver a mitogenic signal to quiescent human melanoma cells and that the alpha(5)/beta(1)-integrin receptor mediates this stimulus. In view of this finding we have analysed the in vivo expression of FN, and of ED-A and ED-B FN isoforms, in benign and malignant lesions of melanocyte origin. In the same specimens the expression of fibronectin integrin receptors was evaluated. The results demonstrate that, while detection of FN does not correlate with transformation and tumour progression, the expression of the two isoforms is associated with transformation and that only the ED-A variant is found in metastases. Integrin phenotpping disclosed that alpha(3)/beta(1) expression is associated with tumour progression, alpha(v)/beta(3) is a marker of transformation, alpha(4) is rarely expressed and alpha(5) is expressed by about 50% and 30% of the primary and metastatic lesions respectively. Taken together, the results of this study demonstrate that transformation and tumour progression of the melanocyte lineage are associated with modulation of expression of FN isoforms and FN integrin receptors. Furthermore, the expression of alpha(5)-integrin in a considerable percentage of primary and metastatic lesions indicates that FN may deliver a proliferative stimulus to melanoma cells in vivo.
引用
收藏
页码:1243 / 1247
页数:5
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