[The correlation of cyclin A gene expression with drug resistance in adult acute leukemia patients].
OBJECTIVE
To investigate the relationship between the expression of cyclin A and drug resistance in patients with adult acute leukemias.


METHODS
The mRNA expressions of cyclin A, mdr1, Topo II alpha and bcl-2 were measured in 64 patients with adult acute leukemia (AL) and 20 normal subjects by semi-quantitative reverse transcriptase polymerase chain reaction (RT-PCR).


RESULTS
(1) The cyclin A and Topo II alpha mRNA expression levels in the treatment resistant group were significantly lower than that in the sensitive group (P < 0.01). There was no cyclin A mRNA expression in the 20 normal subjects under the same experiment condition. (2) The mdr1 and bcl-2 mRNA expression levels in the resistant group were significantly higher than that in sensitive group (P < 0.01). (3) Cyclin A and Topo II alpha gene expression levels were positively correlated (r = 0.794, P = 0.000) in the 64 AL patients, and there was a negative correlation between the gene expression levels of cyclin A and mdr1 (r = -0.337, P = 0.029) in the drug resistant group. (4) Ten AL patients with low expressions of both cyclin A and Topo II alpha were all in the resistant group. Logistic regression of binary analysis showed a significant correlation between the low expression of cyclin A and drug resistance.


CONCLUSIONS
Low expression of cyclin A gene might be a unfavorable prognostic factor for patients with AL and measurement of both cyclin A and Topo II alpha gene expression would predict drug resistance for AL patients.
Department of Hematology, the Second Hospital, Hebei Medical Univercity, Shijiazhuang 050000, China.
Jie
J
Ma
Shirong
S
Xu
Yongrong
Y
Lai
Yuying
Y
Lu
D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000235:genetics / Q000378:metabolism; D000208:Acute Disease; D000328:Adult; D000951:Antigens, Neoplasm; D019925:Cyclin A / Q000235:genetics / Q000378:metabolism*; D004250:DNA Topoisomerases, Type II / Q000235:genetics / Q000378:metabolism*; D004268:DNA-Binding Proteins; D018432:Drug Resistance, Multiple / Q000235:genetics / Q000502:physiology*; D019008:Drug Resistance, Neoplasm / Q000502:physiology*; D005260:Female; D006801:Humans; D007938:Leukemia / Q000235:genetics / Q000378:metabolism*; D016015:Logistic Models; D008297:Male; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000235:genetics / Q000378:metabolism; D012333:RNA, Messenger / Q000096:biosynthesis
D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D000951:Antigens, Neoplasm; D019925:Cyclin A; D004268:DNA-Binding Proteins; D019253:Proto-Oncogene Proteins c-bcl-2; D012333:RNA, Messenger; D004250:DNA Topoisomerases, Type II