TY - JOUR
T1 - Chromosome 5 aberrations and genetic predisposition to lung cancer
AU - Xifeng, W. U.
AU - Zhao, Yin
AU - Kemp, Bonnie L.
AU - Amos, Christopher I.
AU - Siciliano, Michael J.
AU - Spitz, Margaret R.
PY - 1998
Y1 - 1998
N2 - In this study, we aimed to confirm the finding that chromosome 5 aberrations are predisposing factors for lung cancer. The study population consisted of 118 previously untreated lung cancer patients and 101 healthy controls. Lymphocytes were treated with bleomycin for 5 hr and then allowed to recover in a drug-free medium for 48 hr. The mean number of cells with chromosome 5 abnormalities among 100 cells examined was significantly higher in patients (9.12) than in controls (4.69) (p < 0.001). The most frequent aberration was a 5q deletion and the breakpoints clustered at the 5q13-5q31 region. We then dichotomized the number of induced chromosome 5 abnormalities in peripheral blood lymphocytes by the 75th percentile in that of the controls. 103 (87.3%), of the 118 patients, but only 31 (30.7%) of the 101 controls, exhibited induced breaks above this point. After adjustment for age, sex, ethnicity and smoking status, we found that the sensitive group was at 14.4-fold increased risk for lung cancer. There was also a significant (p < 0.01) gradient of increased risk for lung cancer with an increasing number of chromosome 5 lesions. Therefore, chromosome 5 lesions, especially those at 5q, may be a molecular target of carcinogens in the development of lung cancer.
AB - In this study, we aimed to confirm the finding that chromosome 5 aberrations are predisposing factors for lung cancer. The study population consisted of 118 previously untreated lung cancer patients and 101 healthy controls. Lymphocytes were treated with bleomycin for 5 hr and then allowed to recover in a drug-free medium for 48 hr. The mean number of cells with chromosome 5 abnormalities among 100 cells examined was significantly higher in patients (9.12) than in controls (4.69) (p < 0.001). The most frequent aberration was a 5q deletion and the breakpoints clustered at the 5q13-5q31 region. We then dichotomized the number of induced chromosome 5 abnormalities in peripheral blood lymphocytes by the 75th percentile in that of the controls. 103 (87.3%), of the 118 patients, but only 31 (30.7%) of the 101 controls, exhibited induced breaks above this point. After adjustment for age, sex, ethnicity and smoking status, we found that the sensitive group was at 14.4-fold increased risk for lung cancer. There was also a significant (p < 0.01) gradient of increased risk for lung cancer with an increasing number of chromosome 5 lesions. Therefore, chromosome 5 lesions, especially those at 5q, may be a molecular target of carcinogens in the development of lung cancer.
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U2 - 10.1002/(SICI)1097-0215(19981023)79:5<490::AID-IJC8>3.0.CO;2-W
DO - 10.1002/(SICI)1097-0215(19981023)79:5<490::AID-IJC8>3.0.CO;2-W
M3 - Article
C2 - 9761118
AN - SCOPUS:3543111939
SN - 0020-7136
VL - 79
SP - 490
EP - 493
JO - International journal of cancer
JF - International journal of cancer
IS - 5
ER -