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[GPI-PLD gene exon14 polymorphisms of leucocyte in peripheral blood from healthy persons and leukemia patients].

OBJECTIVE
To analyze the polymorphisms of glycosylphosphatidylinositol-specific phospholipase D (GPI-PLD) gene exon 14, GPI-PLD activity of leucocyte in the peripheral blood,and the relationship in leukemia patients of Han nationality in Hunan.


METHODS
Both 96 leukemia patients and 96 healthy persons of Han nationality in Hunan were researched [including 48 acute non-lymphocytic leukaemia (ANLL) patients as group A, 31 acute lymphoblastic leukaemia (ALL) patients as group B, 12 chronic granulocytic leukaemia (CML) patients as group C, 5 chronic lymphocytic leukaemia (CLL) patients as group D]. The polymorphisms were analyzed by PCR-SSCP and sequencing;. and GPI-PLD activities were determined by GPI-anchored placental alkaline phosphatase (PLAP) as substrate and triton-X114 partioning.


RESULTS
There were four variations in the coverage of GPI-PLD gene exon 14 of leukemia patients and healthy persons. The codons of variation were: 1257 C-->T, 1298 T-->C, 1218 C-->A, 1257 C-->A. The total various frequency in leukemia patient and healthy person, which was determined by SSCP, was 28.12% and 20.83%. On the basis of the percentage of GPI-anchored PLAP conversion, the leucocyte GPI-PLD activities of the 96 leukemia patients were measured. Compared with the 96 healthy controls, the leukocyte GPI-PLD activites of ANLL and CLL patients were significantly increased; the acticities of ALL and CML patients were significantly reduced.


CONCLUSION
Leukocyte GPI-PLD gene in the peripheral blood, which belongs to healthy persons and leukemia patients of Han nationality in Hunan, is polymorphism. The leukocyte GPI-PLD activities in the four groups are remarkable.