Identification of a suitable qPCR reference gene in metastatic clear cell renal cell carcinoma

被引:20
作者
Wierzbicki, Piotr M. [1 ]
Klacz, Jakub [2 ]
Rybarczyk, Agnieszka [1 ]
Slebioda, Tomasz [1 ]
Stanislawowski, Marcin [1 ]
Wronska, Agata [1 ]
Kowalczyk, Anna [3 ]
Matuszewski, Marcin [2 ]
Kmiec, Zbigniew [1 ]
机构
[1] Med Univ Gdansk, Fac Med, Dept Histol, PL-80211 Gdansk, Poland
[2] Med Univ Gdansk, Fac Med, Dept Urol, Gdansk, Poland
[3] Univ Warmia & Mazury, Dept Human Histol & Embryol, Fac Med Sci, Olsztyn, Poland
关键词
ccRCC; Metastasis; Reference gene; RPL13; GUSB; Quantitative PCR; REAL-TIME PCR; COLORECTAL-CANCER; EXPRESSION ANALYSIS; HOUSEKEEPING GENES; KIDNEY CANCER; NORMALIZATION; VALIDATION; P53; SELECTION; BLADDER;
D O I
10.1007/s13277-014-2566-9
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
There is no data on reference gene (RG) selection in metastatic clear-cell renal cell carcinoma (mccRCC) for quantitative PCR (qPCR) data normalization. We aimed at selecting the most stable RG for further determination of new prognostic markers. Thirty-five nonmetastatic and 35 mccRCC patients undergoing radical nephrectomy were included. Paired primary tumor (T, n=70) and normal (C, n=70) kidney fragments were collected; from 12 out of 35 mccRCC cases, we also collected metastasized regional lymph nodes and adrenal gland tissues (M, n=12). After RNA extraction, reverse transcription and qPCR were performed. Samples were divided into four analyzed groups. Fifteen candidate RGs were tested by RefFinder tool and manual statistics. To present the importance of RG selection, TP53 gene expression levels in samples were normalized with the use of RG data. RPL13 gene was the most stable RG in analysis of 35 primary tumor nonmetastatic versus 35 mccRCC samples and matched metastasized T/C/M samples (n=12, each group). GUSB was the most suitable RG in total 152 samples and in paired T and C (n=140) kidney samples. Expression of GUSB, RPL13, and the RPL13+RPLP0 pair were independent of clinical/sample variables. Normalization of TP53 expression levels showed variability of GAPDH and ACTB assays. GUSB or RPL13 assays should be used in mccRCC for qPCR data normalization whereas GAPDH and ACTB assays should be avoided. Prior RG studies should precede each qPCR gene expression study since RG selection is associated with the origin and proportion of specimens.
引用
收藏
页码:12473 / 12487
页数:15
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