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Cytogenetics and Molecular Genetics

Newly diagnosed acute lymphoblastic leukemia in China (I): abnormal genetic patterns in 1346 childhood and adult cases and their comparison with the reports from Western countries

Abstract

It has been generally acknowledged that the diagnosis, treatment and prognosis evaluation of leukemia largely rely on an adequate identification of genetic abnormalities. A systemic analysis of genetic aberrations was performed in a cohort of 1346 patients with newly diagnosed acute lymphoblastic leukemia (ALL) in China. The pediatric patients had higher incidence of hyperdiploidy and t(12;21) (p13;q22)/ETV6–RUNX1 than adults (P<0.0001); in contrast, the occurrence of Ph and Ik6 variant of IKZF1 gene was much more frequent in adult patients (all P<0.0001). In B-ALL, the existence of Ik6 and that of BCR–ABL were statistically correlated (P<0.0001). In comparison with Western cohorts, the incidence of t(9;22) (q34;q11)/BCR–ABL (14.60%) in B-ALL and HOX11 expression in T-ALL (25.24%) seemed to be much higher in our group, while the incidence of t(12;21) (p13;q22)/ETV6–RUNX1 (15.34%) seemed to be lower in Chinese pediatric patients. The occurrence of hyperdiploidy was much lower either in pediatric (10.61% vs 20–38%) or adult patients (2.36% vs 6.77–12%) in our study than in Western reports. In addition, the frequencies of HOX11L2 in adult patients were much higher in our cohort than in Western countries (20.69% vs 4–11%). In general, it seems that Chinese ALL patients bear more adverse prognostic factors than their Western counterparts do.

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Acknowledgements

This work was supported in part by the Mega project of Ministry of Science and Technology (2008ZX09312-026, 2009ZX09103-431), the National Basic Research Program (973, 2010CB529200), the National Natural Science Foundation of China (30871106, 30772744, 30821063) and Science and Technology Commission Foundation of Shanghai (09dZ1974500).

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Correspondence to J-Q Mi or S-J Chen.

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Chen, B., Wang, YY., Shen, Y. et al. Newly diagnosed acute lymphoblastic leukemia in China (I): abnormal genetic patterns in 1346 childhood and adult cases and their comparison with the reports from Western countries. Leukemia 26, 1608–1616 (2012). https://doi.org/10.1038/leu.2012.26

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