[Detection of FLT3 gene and FLT3/ITD gene mutation in chronic myeloid leukemia and its significance].
OBJECTIVE
Fms-like tyrosine kinase 3 (FLT3)gene abnormal expression could be detected in most of acute myeloid leukemia (AML)patients, and 20%-30% of them have FLT3/ITD gene mutation which indicate poor prognosis. This study was to detect FLT3 gene expression, and FLT3/ITD gene mutation in chronic myeloid leukemia (CML)patients, and analyze their relationships with prognosis.


METHODS
Polymerase chain reaction (PCR)was used to detect FLT3 gene expression, and FLT3/ITD gene mutation in 53 CML patients of chronic phase,and 34 CML patients of accelerated phase or blast crisis.


RESULTS
FLT3 gene was detected in 5.7%(3/53)CML patients of chronic phase, and in 55.9% (19/34)CML patients of accelerated phase or blast crisis,the difference of FLT3 gene positive rate between these 2 groups was significant (P< 0.001). Only 2 of 87 CML patients (2.3%)were found with FLT3/ITD mutation.


CONCLUSIONS
FTL3 gene expresses mainly in CML patients of accelerated phase or blast crisis. FTL3/ITD gene mutation was seldom involved in CML patients. The CML patients with FLT3 gene expression and FTL3/ITD gene mutation may have poor prognosis.
Department of Hematology, Nanfang Hospital, The First Military Medical University, Guangzhou, Guangdong, 510515, P.R.China. xbzj@fimmu.edu.com
Bing
B
Xu
Hong
H
Tian
Shu-Yun
SY
Zhou
D000328:Adult; D000368:Aged; D001752:Blast Crisis / Q000235:genetics; D005260:Female; D006801:Humans; D015464:Leukemia, Myelogenous, Chronic, BCR-ABL Positive / Q000235:genetics*; D015465:Leukemia, Myeloid, Accelerated Phase / Q000235:genetics; D008297:Male; D008875:Middle Aged; D009154:Mutation; D011379:Prognosis; D011518:Proto-Oncogene Proteins / Q000235:genetics*; D020794:Receptor Protein-Tyrosine Kinases / Q000235:genetics*; D020080:Tandem Repeat Sequences / Q000235:genetics; D051941:fms-Like Tyrosine Kinase 3
D011518:Proto-Oncogene Proteins; C497970:FLT3 protein, human; D020794:Receptor Protein-Tyrosine Kinases; D051941:fms-Like Tyrosine Kinase 3