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通过蛋白质组学方法检测和鉴定肝癌中的过氧化物酶 3 作为生物标志物。

Detection and identification of peroxiredoxin 3 as a biomarker in hepatocellular carcinoma by a proteomic approach.

机构信息

Department of Surgery, The Third Xiangya Hospital, Central South University, Changsha, Hunan 410013, P.R. China.

出版信息

Int J Mol Med. 2012 May;29(5):832-40. doi: 10.3892/ijmm.2012.916. Epub 2012 Feb 15.

Abstract

Hepatocellular carcinoma (HCC) is one of the most common malignancies worldwide with poor prognosis due to resistance to conventional chemotherapy and limited efficacy of radiotherapy. Thus, alternative therapeutic strategies need to be established. In order to search for a useful biomarker to improve its efficacy, we conducted a two-dimensional gel electrophoresis and MALDI-TOF MS-based comparative proteomic analysis to profile the differentially expressed proteins between HCC tumor tissues with histological evidence and the adjacent non-tumor tissues. Twenty-two out of 43 dysregulated proteins were identified, including 15 upregulated proteins, and 7 downregulated proteins (over 2-fold, P<0.01). The expression of peroxiredoxin 3 (PRDX3) at the mRNA and protein levels was confirmed by RT-PCR and western blotting in HCC cell lines, and HCC samples, and further analysed by immunohistochemistry in HCC samples of different clinical pathological stages. The results indicated that overexpression of PRDX3 was associated with 94.9% HCC, and correlated with poor differentiation (P<0.05), which suggest that PRDX3 has substantial clinical impact on the progression of hepatocarcinoma, and may be a potential therapeutic target for HCC.

摘要

肝细胞癌(HCC)是全球最常见的恶性肿瘤之一,由于对常规化疗的耐药性和放疗效果有限,预后较差。因此,需要建立替代的治疗策略。为了寻找有用的生物标志物来提高其疗效,我们进行了二维凝胶电泳和 MALDI-TOF MS 基于比较蛋白质组学分析,以描绘组织学证据的 HCC 肿瘤组织与相邻非肿瘤组织之间差异表达的蛋白质图谱。在 43 个失调蛋白中,有 22 个被鉴定出来,包括 15 个上调蛋白和 7 个下调蛋白(超过 2 倍,P<0.01)。PRDX3 的表达通过 RT-PCR 和 Western blot 在 HCC 细胞系和 HCC 样本中得到了证实,并通过免疫组织化学在不同临床病理阶段的 HCC 样本中进行了进一步分析。结果表明,PRDX3 的过表达与 94.9%的 HCC 相关,并且与低分化相关(P<0.05),这表明 PRDX3 对肝癌的进展具有重要的临床影响,可能是 HCC 的潜在治疗靶点。

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