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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Expression of interferon-alpha (IFN-alpha) receptor 2c at diagnosis is associated with cytogenetic response in IFN-alpha-treated chronic myeloid leukemia.

For the management of chronic myeloid leukemia (CML), prediction or early determination of the response to interferon-alpha (IFN-alpha) treatment is important for identifying nonresponder patients to whom alternative therapy may be proposed. In this study, the levels of expression of both BCR-ABL and subunit 2c of IFN-alpha receptor (IFN-alphaR2c) genes were analyzed at diagnosis in 74 patients with chronic phase CML treated with an IFN-alpha monotherapy. By using blood samples, real-time quantitative polymerase chain reaction was performed to quantify BCR-ABL, IFN-alphaR2c, and G6PDH mRNA as external control. The results were compared with hematologic and cytogenetic responses to IFN-alpha. A wide variation in the BCR-ABL/G6PDH ratio was observed at diagnosis (median, 6.68%; range, 0.18%-41.31%), but no significant association with response to IFN-alpha was observed. In contrast, the variation of IFN-alphaR2c/G6PDH ratio at diagnosis was significantly associated with the achievement of major cytogenetic response ( MCR; 34% or lower Ph(+) metaphases). Median values of IFN-alphaR2c/G6PDH ratio for patients achieving MCR and for those who did not achieve it were 110.75% (range, 9.47%-612.30%) and 64.42% (range, 5.96%-425.40%), respectively (P =.037). In addition, this novel molecular factor, combined with the achievement of complete hematologic response at 3 months, makes it possible to predict MCR achievement with high probability by Kaplan-Meier analysis (91% +/- 17% at 24 months; P =.0001). (Blood. 2001;97:3568-3573)[1]

References

  1. Expression of interferon-alpha (IFN-alpha) receptor 2c at diagnosis is associated with cytogenetic response in IFN-alpha-treated chronic myeloid leukemia. Barthe, C., Mahon, F.X., Gharbi, M.J., Fabères, C., Bilhou-Nabéra, C., Hochhaus, A., Reiffers, J., Marit, G. Blood (2001) [Pubmed]
 
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