title: Correlation between cyclin A gene expression in adult patients with acute leukemia and drug resistance.
abstract: In order to investigate the relationship between the expression of cyclin A and drug resistance in adult patients with acute leukemia (AL), the mRNA expression of cyclin A, mdr1, Top II alpha, bcl-2 was detected in 64 adult patients with AL and 20 normal controls by semi-reverse transcription polymerase chain reaction (semi-RT-PCR). It was found that the cyclin A and Top II alpha mRNA expression levels in drug resistant group were significantly lower than in sensitive group (P < 0.01). Under the same experimental condition no cyclin A mRNA expression was detectable in all normal controls. The mdr1 and bcl-2 mRNA expression levels in resistant group were significantly higher than in sensitive group (P < 0.01), cyclin A and Top II alpha gene expression levels were closely correlated (rs = +0.794, P = 0.000, n = 64) in all AL patients, but cyclin A was not correlated with mdr1 and bcl-2 gene expression levels. In drug resistant group there was a negative correlation between the gene expression levels of cyclin A and mdr1 (rs = -0.337, P = 0.029). The 10 AL patients with positive lower expression of both cyclin A and Top II alpha were all resistant to drugs. Logistic regression of Binary analysis showed the correlation between the lower expression of cyclin A and drug resistance. It was concluded that lower expression of cyclin A gene might be an unfavorable prognostic factor for patients with AL, and detection of both cyclin A and Top II alpha gene expression would predict drug resistance in AL patients.
authors.affiliation: Department of Hematology, Second Hospital, Hebei Medical University, Shijiazhuang 050000.
authors.forename: Jie
authors.initials: J
authors.lastname: Ma
authors.forename: Shirong
authors.initials: S
authors.lastname: Xu
authors.forename: Yongrong
authors.initials: Y
authors.lastname: Lai
authors.forename: Yuying
authors.initials: Y
authors.lastname: Lu
authors.forename: Ergu
authors.initials: E
authors.lastname: Yao
mesh_terms: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000235:genetics; D000293:Adolescent; D000328:Adult; D000368:Aged; D019925:Cyclin A / Q000096:biosynthesis / Q000235:genetics*; D018432:Drug Resistance, Multiple / Q000235:genetics; D019008:Drug Resistance, Neoplasm / Q000235:genetics*; D005260:Female; D019450:Genes, MDR / Q000235:genetics; D006801:Humans; D015470:Leukemia, Myeloid, Acute / Q000235:genetics*; D015473:Leukemia, Promyelocytic, Acute / Q000235:genetics; D008297:Male; D008875:Middle Aged; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000235:genetics*; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics
chemical_list: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D019925:Cyclin A; D012333:RNA, Messenger