The prognostic significance of serum XCL1 concentration in patients with acute lymphoblastic leukemia: a pilot study.

There is no information about XCL1 in patients with acute lymphoblastic leukemia (ALL). The objective of this study was to correlate the serum levels of XCL1 and survival in ALL patients. Only ALL patients older than 12 months were considered to participate. Serum XCL1 was measured at diagnosis, end of remission induction, and end of consolidation. Thirty-three ALL patients with median age of 21 years (1-78) were included. Higher XCL1 level (above 50 pg/mL) at ALL diagnosis correlated with higher survival (p = 0.038), whereas XCL1 level at end of induction and consolidation had no significant correlation. Concerning the behavior of serum XCL1 during treatment, higher survival at 5 years was observed in the group with progressively decreased levels of XCL1 (70%) than those with progressively increasing (29%) or no detectable XCL1 (14%). In conclusion, higher serum XCL1 levels at diagnosis and their progressive decline throughout chemotherapy could be correlated with higher survival.

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