Abstract:
:HnRNP G is a member of heterogeneous nuclear ribonucleoprotein (hnRNP) family with potent tumor suppressive activities. Human transformer-2-beta1 (hTra2-beta1) belongs to the arginine-serine rich like proteins and is found over-expressed in various human cancers. It was recently shown that hnRNP G and hTra2-beta1 exert antagonistic effects on alternative splicing. In our study we explored the impact of these two factors in tumor biology of endometrial cancer (EC). EC tissues (n = 139) were tested for hnRNP G and hTra2-beta1 expression on mRNA level by real time PCR and on protein level by immunohistochemistry. HTra2-beta1 mRNA level was found being induced in advanced International Federation of Gynecology and Obstetrics (FIGO) stages (p = 0.016). HnRNP G protein nuclear expression was found more prominent in patients without distant organ metastases (p = 0.033) and in FIGO Stages I/II group (p < 0.001). HTra2-beta1 protein nuclear levels were elevated in poorly differentiated (p = 0.044) and lymph node metastases (p = 0.003) cancers. Kaplan-Meier survival curves revealed that elevated hnRNP G mRNA (p = 0.029) and protein (p = 0.022) levels were associated with a favorable patient outcome. Multivariate Cox-regression analyses identified nuclear hnRNP G level [hazard ratio (HR) 0.468, p = 0.026) as well as hTra2-beta1 level (hazard ratio 5.760, p = 0.004) as independent prognostic factors for EC progression-free survival. Our results indicate that the antagonistic functional effects of hnRNP G and hTra2-beta1 on alternative splicing correlate directly to their opposite clinical effects on EC patient outcome.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Ouyang YQ,zur Hausen A,Orlowska-Volk M,Jäger M,Bettendorf H,Hirschfeld M,Tong XW,Stickeler Edoi
10.1002/ijc.25544subject
Has Abstractpub_date
2011-05-01 00:00:00pages
2010-9issue
9eissn
0020-7136issn
1097-0215journal_volume
128pub_type
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