[Preliminary study of proteins related to blast crisis in chronic myeloid leukemia].
OBJECTIVE
To identify and compare the expression profiles of differential proteins between chronic phase and blast crisis in chronic myeloid leukemia (CML) by proteomic analysis, and screen the proteins related to blast crisis.


METHODS
The total cellular proteins from the bone marrow cells at chronic phase (CP) and blast crisis (BC) in CML were separated by two-dimensional polyacrylamide gel electrophoresis (2-DE) and analyzed with ImageMaster 5.0 software to screen the differential protein spots. Differential protein spots were identified by mass spectrometry for peptide mass fingerprint in combination with database searching from SWISS-PROT. Then 3 protein spots were selected to verify at protein and mRNA levels by Western blot and semi-quantitative RT-PCR, separately.


RESULTS
Comparing gel pages from CML-CP and CML-BC, the expression of 13 protein spots decreased and 25 protein spots increased significantly in CML-BC. Twenty differential protein spots were identified by mass spectrometry and 15 were successfully determined. The results of Western blotting were similar to those of 2-DE and showed a high expression of hnRNPK, annexin A1 and RhoA. Semi-quantitative RT-PCR analysis showed that there was no correlation between the protein expression changes and mRNA levels of hnRNPK, annexin A1 and RhoA.


CONCLUSIONS
A group of proteins associated with blast crisis are obtained and the results may provide clues for further research to elucidate the role of these proteins in CML-BC carcinogenesis and to develop potential associated biomarkers.
Zhu
Hong-qian
HQ
Department of Hematology, Nanfang Hospital, Nanfang Medical College, Guangzhou, China.
Liu
Xiao-li
XL
Li
Rong
R
Du
Qing-feng
QF
Zhang
Song
S
Yao
Feng
F
Liu
Zhi
Z
D000328:Adult; D000368:Aged; D017305:Annexin A1 / Q000235:genetics / Q000378:metabolism; D001752:Blast Crisis / Q000235:genetics / Q000378:metabolism*; D005260:Female; D020869:Gene Expression Profiling; D034641:Heterogeneous-Nuclear Ribonucleoprotein K; D006801:Humans; D015466:Leukemia, Myeloid, Chronic-Phase / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D040901:Proteomics / Q000379:methods*; D012333:RNA, Messenger / Q000378:metabolism; D012261:Ribonucleoproteins / Q000235:genetics / Q000378:metabolism; D055815:Young Adult; D020742:rhoA GTP-Binding Protein / Q000235:genetics / Q000378:metabolism
D017305:Annexin A1; D034641:Heterogeneous-Nuclear Ribonucleoprotein K; D012333:RNA, Messenger; D012261:Ribonucleoproteins; C066737:RHOA protein, human; C072074:HNRNPK protein, human; D020742:rhoA GTP-Binding Protein