Expression of cyclin A1 and cell cycle proteins in hematopoietic cells and acute myeloid leukemia and links to patient outcome.
Abnormal expression of several key regulators essential for G1/S transitions has been implicated in tumorigenesis. A critical role of cyclin A1 in the development of acute myeloid leukemia (AML) has previously been demonstrated in transgenic mice. Our present study focused on the expression and prognostic significance of cyclin A1 and a panel of cell cycle regulatory proteins including cyclin A2, cyclin B1, cyclin E, CDK1, CDK2, p21 and p27 in bone marrow samples from 40 patients with AML. Freshly isolated CD34+ hematopoietic cells and bone marrow samples from 10 healthy donors were also assessed for cell type- and subcellular-specific expression of the cell cycle regulatory proteins. The level of cyclin A1 expression was the only factor that showed a significant correlation with patient outcome. In log-rank test stratified by levels of cyclin A1 expression, patients with high levels of cyclin A1 had significantly worse overall survival (OS) (P = 0.012) compared to those with low levels. Further, patients with high levels of cyclin A1 had significantly lower disease-free survival (DFS) (P = 0.028). Multivariate analysis indicated that cyclin A1 protein expression was an independent prognostic factor for predicting DFS (P = 0.035) and OS (P = 0.045). No correlation between cyclin A1 expression and age was found. However, expression of cyclin A2, cyclin B1, cyclin E, CDK1, CDK2, p21 and p27 did not show prognostic significance in these AML patients.
Ekberg
Jenny
J
Division of Pathology, Department of Laboratory Medicine, Lund University, University Hospital, Malmö, Sweden.
Holm
Caroline
C
Jalili
Sara
S
Richter
Johan
J
Anagnostaki
Lola
L
Landberg
Göran
G
Persson
Jenny Liao
JL
D000208:Acute Disease; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D018952:Antigens, CD34; D001854:Bone Marrow Cells; D016022:Case-Control Studies; D018797:Cell Cycle Proteins / Q000235:genetics*; D019925:Cyclin A / Q000235:genetics*; D056750:Cyclin A1; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D006412:Hematopoietic Stem Cells / Q000378:metabolism*; D006801:Humans; D007951:Leukemia, Myeloid / Q000378:metabolism / Q000401:mortality / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011379:Prognosis; D016019:Survival Analysis
D018952:Antigens, CD34; C503745:CCNA1 protein, human; D018797:Cell Cycle Proteins; D019925:Cyclin A; D056750:Cyclin A1