Coexpression of cyclin D1 and retinoblastoma gene product (pRb) in human squamous cell lung carcinomas is associated with increased tumor take rate in nude mice
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- Published online on: December 1, 1996 https://doi.org/10.3892/ijo.9.6.1253
- Pages: 1253-1257
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Abstract
Samples from 72 squamous cell lung carcinomas were analyzed immunohistochemically for the expression of cyclin D1 and pRb. Expression of cyclin D1 was found in 61% and expression of pRb in 39% of the cases. The take rate of human squamous cell lung carcinomas in nude mice was significantly different according to the expression of cyclin D1 and expression of pRb in primary human tumors [cyclin D1-negative (32%) vs. cyclin D1-positive (59%); P=0.026; pRb-negative (34%) vs. pRb-positive (71%); P=0.002]. The take rate was improved by coexpression of both proteins [both proteins negative/both proteins positive: 12% vs. 80% (P=0.00005)]. An association of the take rate and clinical parameters (age, extent of tumors, lymph node involvement, stage) could not be observed. Coexpression of cyclin D1 and pRb is also a prognostic factor for the patients' survival.
