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首页> 外文期刊>Cytokine >Presence of leukaemia inhibitory factor (LIF) and LIF-receptor chain (gp190) in osteoclast-like cells cultured from human giant cell tumour of bone. Ultrastructural distribution.
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Presence of leukaemia inhibitory factor (LIF) and LIF-receptor chain (gp190) in osteoclast-like cells cultured from human giant cell tumour of bone. Ultrastructural distribution.

机译:从人骨巨细胞瘤培养的破骨细胞样细胞中存在白血病抑制因子(LIF)和LIF受体链(gp190)。超微结构分布。

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摘要

The behaviour of multinucleated giant cells (MNC) obtained from a giant cell tumour of the tibia and cultured on glass coverslips or on devitalized dentin slices was investigated using light and electron microscopy. Cells were studied in the presence or absence of LIF a cytokine known to be involved in bone turnover and to act as a growth factor in some solid tumours. The direct effect of LIF on MNC was examined by a post-embedding colloidal gold immunocytochemistry process using human anti-LIF and anti-LIF-receptor (chain gp190) antibodies. After 7 days of culture, the MNC obtained displayed osteoclast immunocytochemical features. Moreover, these MNC were able to resorb large amounts of dentin and presented typical features of active osteoclasts. Immunolocalization of LIF and LIF-receptor revealed the presence of this cytokine and its receptor within the cytoplasm and nucleus of active resorbing MNC. LIF upmodulated MNC number and nucleation but decreased their ability to resorb dentin. The present study suggests that MNC obtained from human GCT, currently considered as osteoclast-like cells, are targets for LIF and may be a source of LIF production in this pathological condition. Copyright 1999 Academic Press.
机译:使用光学和电子显微镜研究了从胫骨巨细胞瘤获得并培养在玻璃盖玻片或失活的牙本质切片上的多核巨细胞(MNC)的行为。在存在或不存在LIF的情况下研究了细胞,LIF是一种已知参与骨转换并在某些实体瘤中充当生长因子的细胞因子。通过使用人抗LIF和抗LIF受体(gp190链)抗体的包埋后胶体金免疫细胞化学方法检查了LIF对MNC的直接作用。培养7天后,获得的MNC显示出破骨细胞免疫细胞化学特征。此外,这些MNC能够吸收大量的牙本质,并表现出活性破骨细胞的典型特征。 LIF和LIF受体的免疫定位揭示了这种细胞因子及其受体在主动吸收MNC的细胞质和细胞核中的存在。 LIF上调了MNC的数量和成核,但降低了其吸收牙本质的能力。本研究表明,从人GCT获得的MNC(目前被认为是破骨细胞样细胞)是LIF的靶标,在这种病理情况下可能是LIF产生的来源。版权所有1999,学术出版社。

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