首页> 外文期刊>Cytokine >Production of intracellular IL-1alpha, IL-1beta, and IL-1Ra isoforms by activated human dermal and synovial fibroblasts: phenotypic differences between human dermal and synovial fibroblasts.
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Production of intracellular IL-1alpha, IL-1beta, and IL-1Ra isoforms by activated human dermal and synovial fibroblasts: phenotypic differences between human dermal and synovial fibroblasts.

机译:活化的人真皮和滑膜成纤维细胞产生胞内IL-1alpha,IL-1beta和IL-1Ra亚型:人真皮和滑膜成纤维细胞之间的表型差异。

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摘要

We compared the production of IL-1alpha, IL-1beta, and of IL-1Ra isoforms by cultured human dermal (HDF) and synovial fibroblasts (HSF) in response to IL-1alpha, TNF-alpha, or direct T cell membrane contact. IL-1Ra was constitutively present in the cell lysates of cultured HDF and its synthesis increased in stimulated cells, whereas IL-1Ra was present in low amounts in the supernatants. Secreted IL-1Ra (sIL-1Ra) and intracellular IL-1Ra type 1 (icIL-1Ra1) mRNA levels followed the same pattern. In stimulated HDF, IL-1alpha and IL-1beta were increased intracellularly but remained undetectable in the supernatants. In HSF, IL-1Ra levels increased in both cell lysates and supernatants upon stimulation. IL-1beta was only present in HSF cell lysates after stimulation, whereas IL-1alpha was undetectable. Both sIL-1Ra and icIL-1Ra1 mRNAs were detected in stimulated HSF. icIL-1Ra1 was the predominant intracellular isoform in both cell types. In conclusion, stimulated HDF produce high amounts of intracellular IL-1Ra, IL-1alpha, and IL-1beta. In contrast, HSF synthesized both intracellular and secreted IL-1Ra, whereas IL-1beta was present only in cell lysates. The presence of high amounts of icIL-1Ra1 and intracellular IL-1alpha in HDF suggests that these cytokines may carry out important function inside cells.
机译:我们比较了由培养的人真皮(HDF)和滑膜成纤维细胞(HSF)响应IL-1alpha,TNF-α或直接T细胞膜接触而产生的IL-1alpha,IL-1beta和IL-1Ra同工型。 IL-1Ra组成型存在于培养的HDF的细胞裂解物中,其合成在受刺激的细胞中增加,而IL-1Ra少量存在于上清液中。分泌的IL-1Ra(sIL-1Ra)和细胞内IL-1Ra 1型(icIL-1Ra1)mRNA水平遵循相同的模式。在刺激的HDF中,IL-1α和IL-1β在细胞内增加,但在上清液中仍未检测到。在HSF中,刺激后细胞裂解液和上清液中IL-1Ra水平升高。 IL-1beta仅在刺激后的HSF细胞裂解物中存在,而IL-1alpha无法检测到。在刺激的HSF中均检测到sIL-1Ra和icIL-1Ra1 mRNA。 icIL-1Ra1是两种细胞类型中主要的细胞内亚型。总之,刺激的HDF产生大量的细胞内IL-1Ra,IL-1alpha和IL-1beta。相反,HSF合成了细胞内和分泌的IL-1Ra,而IL-1beta仅存在于细胞裂解物中。 HDF中大量icIL-1Ra1和细胞内IL-1alpha的存在表明,这些细胞因子可能在细胞内部发挥重要作用。

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