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正常人角质形成细胞和成纤维细胞中血管内皮生长因子家族成员VEGF-B、-C和-D的表达比较

Comparative expression of vascular endothelial growth factor family members, VEGF-B, -C and -D, by normal human keratinocytes and fibroblasts.

作者信息

Trompezinski S, Berthier-Vergnes O, Denis A, Schmitt D, Viac J

机构信息

INSERM U 346, Clinique Dermatologique, Hôpital E. Herriot, Lyon, France.

出版信息

Exp Dermatol. 2004 Feb;13(2):98-105. doi: 10.1111/j.0906-6705.2004.00137.x.

Abstract

The vascular endothelial growth factor (VEGF) family includes the related polypeptides VEGF-B, -C and -D, which contribute to endothelial and lymphatic vessel development. The parental VEGF molecule, VEGF-A, has been widely described in the skin, but the other members of the VEGF family have not yet been reported. The aim of our study was to determine whether the two main skin cells, keratinocytes and fibroblasts, expressed VEGF-B, -C and -D in basal condition and after stimulation by either growth factors or the pro-inflammatory cytokine tumour necrosis factor-alpha (TNF-alpha). Reverse-transcription polymerase chain reaction (RT-PCR) analysis on cultured normal human keratinocytes (NHKs) and normal human fibroblasts (NHFs) allowed the detection of different levels of VEGF-B, -C and -D mRNA, in both cell types with similar RT-PCR products in the skin cells. A semi-quantitative evaluation of the VEGF family proteins by dot blot, using the different human recombinant VEGFs, showed different levels of VEGF-B, -C and -D, in NHKs and NHFs. After cell stimulation by growth factors (epidermal growth factor (EGF) and transforming growth factor-beta1 (TGF-beta1) for NHKs and NHFs, respectively), a significant up-regulation of the VEGF family member proteins was observed in NHFs but not in NHKs. Conversely, TNF-alpha did not exert a significant effect. However, we could not detect any transcriptional modification in stimulated cells, whatever the stimulation duration. The addition of cycloheximide to the cell cultures strongly inhibited the increase of VEGF proteins in TGF-beta1-stimulated NHFs. Taken together, the results underline the major role played by NHFs in the elaboration of the VEGF family proteins known to regulate wound healing, chronic inflammation and tumour angiogenesis and lymphangiogenesis.

摘要

血管内皮生长因子(VEGF)家族包括相关多肽VEGF - B、- C和- D,它们有助于内皮细胞和淋巴管的发育。VEGF家族的母体分子VEGF - A在皮肤中已有广泛描述,但VEGF家族的其他成员尚未见报道。我们研究的目的是确定两种主要的皮肤细胞,即角质形成细胞和成纤维细胞,在基础状态下以及在生长因子或促炎细胞因子肿瘤坏死因子-α(TNF -α)刺激后是否表达VEGF - B、- C和- D。对培养的正常人角质形成细胞(NHKs)和正常人成纤维细胞(NHFs)进行逆转录聚合酶链反应(RT - PCR)分析,可检测到不同水平的VEGF - B、- C和- D mRNA,两种细胞类型中的RT - PCR产物在皮肤细胞中相似。使用不同的人重组VEGFs通过斑点印迹法对VEGF家族蛋白进行半定量评估,结果显示NHKs和NHFs中VEGF - B、- C和- D的水平不同。在分别用生长因子(NHKs用表皮生长因子(EGF),NHFs用转化生长因子-β1(TGF -β1))刺激细胞后,在NHFs中观察到VEGF家族成员蛋白显著上调,而在NHKs中未观察到。相反,TNF -α未产生显著影响。然而,无论刺激持续时间如何,我们在受刺激的细胞中均未检测到任何转录修饰。在细胞培养物中添加放线菌酮强烈抑制了TGF -β1刺激的NHFs中VEGF蛋白的增加。综上所述,这些结果强调了NHFs在合成已知可调节伤口愈合、慢性炎症以及肿瘤血管生成和淋巴管生成的VEGF家族蛋白中所起的主要作用。

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