TMPRSS2-ERG gene fusion in small cell carcinoma of the prostate.

TMPRSS2-ERG gene fusion in small cell carcinoma of the prostate.
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DOI:
10.1016/j.humpath.2010.05.026
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发表时间:
2011-01
期刊:
影响因子:
3.3
通讯作者:
Czerniak BA
Czerniak BA
中科院分区:
医学3区
文献类型:
--
作者:
Guo CC;Dancer JY;Wang Y;Aparicio A;Navone NM;Troncoso P;Czerniak BA

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最近的研究表明,大多数前列腺癌携带 TMPRSS2-ERG 基因融合。在这里,我们评估了前列腺小细胞癌 (SCC) (n=12) 中的 TMPRSS2-ERG 基因融合,并与膀胱 (n=12) 和肺 (n=11) 的 SCC 进行比较。花期原位杂交显示8例前列腺SCC(67%)中存在ERG基因重排,其中7例重排与5'ERG基因缺失有关。但 ERG 基因的重排在任何膀胱鳞状细胞癌或肺鳞状细胞癌中均不存在。接下来,我们评估了来自携带 TMPRSS2-ERG 基因融合的两个前列腺 SCC 的裸鼠异种移植物中的 TMPRSS2-ERG 基因融合。通过RT-PCR检测到TMPRSS2-ERG基因融合体编码的两个转录本,DNA测序表明这两个转录本由TMPRSS2基因的外显子1与ERG基因的外显子4或5融合而成。我们的研究证明了前列腺鳞状细胞癌中特异存在 TMPRSS2-ERG 基因融合,这可能有助于区分前列腺起源的鳞状细胞癌和非前列腺起源的鳞状细胞癌。 TMPRSS2-ERG 基因融合在前列腺鳞状细胞癌和腺癌中的高患病率意味着鳞状细胞癌可能与前列腺腺癌具有共同的致病途径。
Recent studies have shown that most prostate cancers carry the TMPRSS2-ERG gene fusion. Here we evaluated the TMPRSS2-ERG gene fusion in small cell carcinoma (SCC) of the prostate (n=12) in comparison with SCC of the urinary bladder (n=12) and lung (n=11). Florescence in situ hybridization demonstrated rearrangement of the ERG gene in 8 cases of prostatic SCC (67%), and the rearrangement was associated with deletion of the 5' ERG gene in 7 cases. But rearrangement of the ERG gene was not present in any SCC of the urinary blader or lung. Next we evaluated the TMPRSS2-ERG gene fusion in nude mouse xenografts that were derived from two prostatic SCCs carrying the TMPRSS2-ERG gene fusion. Two transcripts encoded by the TMPRSS2-ERG gene fusion were detected by RT-PCR, and DNA sequencing demonstrated that the two transcripts were composed of fusions of exon 1 of the TMPRSS2 gene to exon 4 or 5 of the ERG gene. Our study demonstrates the specific presence of TMPRSS2-ERG gene fusion in prostatic SCC, which may be helpful in distinguishing SCC of prostatic origin from non-prostatic origins. The high prevalence of the TMPRSS2-ERG gene fusion in prostatic SCC as well as adenocarcinoma implies that SCC may share a common pathogenic pathway with adenocarcinoma in the prostate.
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