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The GNAS1 T393C polymorphism is associated with disease progression and survival in chronic lymphocytic leukemia.

Authors: Frey, UH  Nuckel, H  Sellmann, L  Siemer, D  Kuppers, R  Durig, J  Duhrsen, U  Siffert, W 
Citation: Frey UH, etal., Clin Cancer Res. 2006 Oct 1;12(19):5686-92.
Pubmed: (View Article at PubMed) PMID:17020971
DOI: Full-text: DOI:10.1158/1078-0432.CCR-06-0288

PURPOSE: B-cell chronic lymphocytic leukemia (B-CLL) is characterized by the accumulation of monoclonal mature B cells. The G protein Galphas subunit has been linked to proapoptotic processes in cancer cell lines. The TT genotype of the GNAS1 T393C polymorphism is associated with increased Galphas transcript levels and a more favorable clinical course in different solid cancers. EXPERIMENTAL DESIGN: We retrospectively genotyped 144 patients with B-CLL to examine a potential association between T393C genotypes with progression-free survival (time from diagnosis to initiation of chemotherapy) and overall survival. RESULTS: The C-allele frequency in the patient group was 0.57 and not significantly different from that of healthy blood donors. Median progression-free survival was significantly different between genotypes (TT 130 months; TC 100 months; CC 31 months; P = 0.0066). Multivariable analysis showed that besides of ZAP-70 (P = 0.005) and Binet stage (P < 0.001), the T393C polymorphism was an independent prognostic factor for progression-free survival [hazard ratio (HR) CC versus TT 2.7; P = 0.010]. In Binet A stages, ZAP-70-positive patients with CC genotypes had a HR of 4.4 to receive first therapy compared with ZAP-70-negative patients with T-alleles (P = 0.0001). Regarding overall survival, CC genotypes (median overall survival, 197 months) were at highest risk for death compared with T-alleles (median overall survival, 310 months) in both univariate (HR, 4.8; P < 0.0001) and multivariable analysis (HR, 5.6; P = 0.002). CONCLUSIONS: Here, we show that the GNAS1 T393C status is a novel independent prognostic marker in patients with B-CLL. These results could help to define patients who could benefit from an early individualized therapy.

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RGD Object Information
RGD ID: 1601379
Created: 2007-04-18
Species: All species
Last Modified: 2007-04-18
Status: ACTIVE



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RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.