Prognostic impact of mRNA levels of osteopontin splice variants in soft tissue sarcoma patients.

Abstract:

BACKGROUND:It is well known that osteopontin (OPN) plays an important role in tumor progression and that a high OPN expression level in several tumor entities correlates with poor prognosis in cancer patients. However, little is known about the prognostic relevance of the OPN mRNA splice variants. METHODS:We analyzed the mRNA expression levels of different OPN splice variants in tumor tissue of 124 soft tissue sarcoma (STS) patients. Quantitative real-time PCR (qRT-PCR) was used to analyze the mRNA expression level of three OPN splice variants (OPN-a, -b and -c). RESULTS:The multivariate Cox's proportional hazard regression model revealed that high mRNA expression levels of OPN splice variants are significantly associated with poor prognosis in STS patients (n = 124). Women (n = 68) with high mRNA expression levels of OPN-a and OPN-b have an especially elevated risk of tumor-related death (OPN-a: RR = 3.0, P = 0.01, CI = 1.3-6.8; OPN-b: RR = 3.4, P = 0.01, CI = 1.4-8.2). In particular, we found that high mRNA expression levels of OPN-b and OPN-c correlated with a high risk of tumor-related death in STS patients that received radiotherapy (n = 52; OPN-b: RR = 10.3, P < 0.01, CI = 2.0-53.7; OPN-c: RR = 11.4, P < 0.01, CI = 2.2-59.3). CONCLUSION:Our study shows that elevated mRNA expression levels of OPN splice variants are negative prognostic and predictive markers for STS patients. Further studies are needed to clarify the impact of the OPN splice variants on prognosis.

journal_name

BMC Cancer

journal_title

BMC cancer

authors

Hahnel A,Wichmann H,Greither T,Kappler M,Würl P,Kotzsch M,Taubert H,Vordermark D,Bache M

doi

10.1186/1471-2407-12-131

subject

Has Abstract

pub_date

2012-04-02 00:00:00

pages

131

issn

1471-2407

pii

1471-2407-12-131

journal_volume

12

pub_type

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