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Cyclin D1 gene G870A polymorphism predicts response to neoadjuvant radiotherapy and prognosis in rectal cancer.

Abstract : PURPOSE: To investigate whether CCND1 genetic variations associated with a constitutive nuclear protein may influence either the pathologic response to preoperative RT or the prognosis in a series of rectal cancer patients. METHODS AND MATERIALS: Seventy rectal cancer patients treated by neoadjuvant radiotherapy were included in the study. CCND1 exon 5 mutations were screened, and the G870A polymorphism was assessed for correlation with clinical variables, tumor response, and patient outcome. RESULTS: No exon 5 mutation was found. Concerning the G870A polymorphism, the A/A variant was significantly associated with radiosensitivity (p = 0.022). Moreover, patients harboring the A allele were correlated with a lower risk of local failure (p = 0.017). Also, combination of the G870A polymorphism with the post-therapeutic lymph node status allowed the elaboration of a prognostic index, which accurately distinguished subgroups of patients with predictable recurrence-free (p = 0.003) and overall (p = 0.044) survival. CONCLUSIONS: Although CCND1 exon 5 mutations are rare in rectal cancer, G870A polymorphism is a frequent variation that may predict radiosensitivity and prognosis.
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https://www.hal.inserm.fr/inserm-00150983
Contributor : Yves Le Ster <>
Submitted on : Monday, June 4, 2007 - 12:47:48 PM
Last modification on : Thursday, May 28, 2020 - 8:06:03 PM
Long-term archiving on: : Thursday, April 8, 2010 - 5:15:50 PM

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Alexandre Ho-Pun-Cheung, Eric Assénat, Simon Thezenas, Frédéric Bibeau, Rouanet Philippe, et al.. Cyclin D1 gene G870A polymorphism predicts response to neoadjuvant radiotherapy and prognosis in rectal cancer.. International Journal of Radiation Oncology - Biology - Physics, Elsevier, 2007, 68 (4), pp.1094-101. ⟨10.1016/j.ijrobp.2007.01.022⟩. ⟨inserm-00150983⟩

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