Responses of Cultured Melanocytes to Defined Growth Factors

Responses of Cultured Melanocytes to Defined Growth Factors
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培养的黑素细胞对特定生长因子的反应

DOI:
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发表时间:
1988
期刊:
影响因子:
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通讯作者:
R. Halaban
R. Halaban
中科院分区:
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作者:
R. Halaban

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为了在体外增殖,正常黑素细胞不同于正常成纤维细胞,除了血清中提供的那些生长因子之外,还需要特异性生长因子。促进黑素细胞增殖的物质,如12-O-十四酰基-佛波醇-13-乙酸酯(TPA)和环磷酸腺苷(cAMP)的刺激剂,也促进色素沉着。因此,细胞分裂和至少一些分化功能的表达对于黑素细胞来说不是相互排斥的。目前,唯一已知的天然生长因子,可以取代TPA在正常的人类黑素细胞培养是碱性成纤维细胞生长因子(bFGF)。与TPA一样,bFGF在大多数情况下仅在添加cAMP的情况下有效。然而,某些bFGF制剂可能具有高度不稳定的内源性cAMP刺激活性。因此,bFGF可能呈现两种形式,依赖于和独立于cAMP刺激活性。或者,第二个因素可能存在于脑垂体中,与bFGF共同纯化,但随着储存而恶化。培养物中的异常黑素细胞,如来自发育不良痣和原发性黑色素瘤的黑素细胞,依赖于特定的因子(bFGF和cAMP),而来自转移性黑色素瘤的黑素细胞则不依赖于这些因子。
To proliferate in vitro, normal melanocytes, unlike normal fibroblasts, require specific growth factors in addition to those supplied in serum. The substances that promote melanocyte proliferation, such as 12-O-tetradecanoyl-phorbol-13-acetate (TPA) and stimulators of cyclic adenosine monophosphate (cAMP), also promote pigmentation. Consequently, cell division and expression of at least some differentiated functions are not mutually exclusive for melanocytes. At present, the only known natural growth factor that can replace TPA in normal human melanocyte cultures is basic fibroblast growth factor (bFGF). Like TPA, bFGF is effective, most of the time, only in the presence of added cAMP. Some preparations of bFGF, however, may have a highly labile, intrinsinc cAMP stimulatory activity. It is thus possible that bFGF can assume two forms, dependent on and independent of cAMP stimulatory activity. Alternatively, a second factor may exist in pituitary glands that co-purifies with bFGF but deteriorates with storage. Abnormal melanocytes in culture, such as those derived from dysplastic nevi and primary melanomas, depend on the specific factors (bFGF and cAMP), whereas melanocytes from metastatic melanomas do not
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