Background: To evaluate the association between polymorphisms involved in DNA repair and oxidative stress genes and mean dose to whole breast on acute skin reactions (erythema) in breast cancer (BC) patients following single shot partial breast irradiation (SSPBI) after breast conservative surgery.Materials and Methods: Acute toxicity was assessed using vers.3 criteria. single nucleotides polymorphisms(SNPs) in genes: XRCC1(Arg399Gln/Arg194Trp), XRCC3 (A4541G-5'UTR/Thr241Met), GSTP1(Ile105Val), GSTA1 and RAD51(untranslated region). SNPs were determined in 57 BC patients by the Pyrosequencing analysis. Univariate(ORs and 95% CI) and logistic multivariate analyses (MVA) were performed to correlate polymorphic genes with the risk of developing acute skin reactions to radiotherapy.Results: After SSPBI on the tumour bed following conservative surgery, grade 1 or 2 acute erythema was observed in 19 pts(33%). Univariate analysis indicated a higher significant risk of developing erythema in patients with polymorphic variant wt XRCC1Arg194Trp, mut/het XRCC3Thr241Met, wt/het XRCC3A4541G-5'UTR. Similarly a higher erythema rate was also found in the presence of mut/het of XRCC1Arg194Trp or wt of GSTA1. Whereas, a lower erythema rate was observed in patients with mut/het of XRCC1Arg194Trp or wt of XRCC1Arg399Gln. The mean dose to whole breast(p = 0.002), the presence of either mut/het XRCC1Arg194Trp or wt XRCC3Thr241Met (p = 0.006) and the presence of either mut/het XRCC1Arg194Trp or wt GSTA1(p = 0.031) were confirmed as predictors of radiotherapy-induced erythema by MVA.Conclusions: The Whole breast mean dose together with the presence of some polymorphic genes involved in DNA repair or oxidative stress could explain the erythema observed after SSPBI, but further studies are needed to confirm these results in a larger cohort.Trial Registration: ClinicalTrials.gov Identifier: NCT01316328.

Dose and polymorphic genes xrcc1, xrcc3, gst play a role in the risk of developing erythema in breast cancer patients following single shot partial breast irradiation after conservative surgery / E. Falvo, L. Strigari, G. Citro, C. Giordano, S. Arcangeli, A. Soriani, D. D'Alessio, P. Muti, G. Blandino, I. Sperduti, P. Pinnarò. - In: BMC CANCER. - ISSN 1471-2407. - 11:1(2011), pp. 291.1-291.9. [10.1186/1471-2407-11-291]

Dose and polymorphic genes xrcc1, xrcc3, gst play a role in the risk of developing erythema in breast cancer patients following single shot partial breast irradiation after conservative surgery

P. Muti;
2011

Abstract

Background: To evaluate the association between polymorphisms involved in DNA repair and oxidative stress genes and mean dose to whole breast on acute skin reactions (erythema) in breast cancer (BC) patients following single shot partial breast irradiation (SSPBI) after breast conservative surgery.Materials and Methods: Acute toxicity was assessed using vers.3 criteria. single nucleotides polymorphisms(SNPs) in genes: XRCC1(Arg399Gln/Arg194Trp), XRCC3 (A4541G-5'UTR/Thr241Met), GSTP1(Ile105Val), GSTA1 and RAD51(untranslated region). SNPs were determined in 57 BC patients by the Pyrosequencing analysis. Univariate(ORs and 95% CI) and logistic multivariate analyses (MVA) were performed to correlate polymorphic genes with the risk of developing acute skin reactions to radiotherapy.Results: After SSPBI on the tumour bed following conservative surgery, grade 1 or 2 acute erythema was observed in 19 pts(33%). Univariate analysis indicated a higher significant risk of developing erythema in patients with polymorphic variant wt XRCC1Arg194Trp, mut/het XRCC3Thr241Met, wt/het XRCC3A4541G-5'UTR. Similarly a higher erythema rate was also found in the presence of mut/het of XRCC1Arg194Trp or wt of GSTA1. Whereas, a lower erythema rate was observed in patients with mut/het of XRCC1Arg194Trp or wt of XRCC1Arg399Gln. The mean dose to whole breast(p = 0.002), the presence of either mut/het XRCC1Arg194Trp or wt XRCC3Thr241Met (p = 0.006) and the presence of either mut/het XRCC1Arg194Trp or wt GSTA1(p = 0.031) were confirmed as predictors of radiotherapy-induced erythema by MVA.Conclusions: The Whole breast mean dose together with the presence of some polymorphic genes involved in DNA repair or oxidative stress could explain the erythema observed after SSPBI, but further studies are needed to confirm these results in a larger cohort.Trial Registration: ClinicalTrials.gov Identifier: NCT01316328.
Aged; Aged, 80 and over; Breast Neoplasms; DNA Repair; DNA-Binding Proteins; Erythema; Female; Genetic Predisposition to Disease; Genotype; Glutathione S-Transferase pi; Glutathione Transferase; Humans; Logistic Models; Middle Aged; Multivariate Analysis; Oxidative Stress; Prospective Studies; Rad51 Recombinase; Radiotherapy, Conformal; Risk Factors; X-ray Repair Cross Complementing Protein 1; Polymorphism, Single Nucleotide; Radiotherapy Dosage
Settore MED/36 - Diagnostica per Immagini e Radioterapia
2011
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/666999
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