Effect of Germline Mutations in Homologous Recombination Repair Genes on Overall Survival of Patients with Pancreatic Adenocarcinoma

2020 ◽  
Vol 26 (24) ◽  
pp. 6505-6512 ◽  
Author(s):  
Siddhartha Yadav ◽  
Pashtoon M. Kasi ◽  
William R. Bamlet ◽  
Thanh P. Ho ◽  
Eric C. Polley ◽  
...  
Keyword(s):  
Overall Survival ◽  
Homologous Recombination ◽  
Pancreatic Adenocarcinoma ◽  
Germline Mutations ◽  
Homologous Recombination Repair ◽  
Recombination Repair ◽  
Repair Genes

scholarly journals Germline Mutations in Other Homologous Recombination Repair-Related Genes Than BRCA1/2: Predictive or Prognostic Factors?

2021 ◽  
Vol 11 (4) ◽  
pp. 245
Author(s):  
Laura Cortesi ◽  
Claudia Piombino ◽  
Angela Toss
Keyword(s):  
Prognostic Factors ◽  
Homologous Recombination ◽  
Pancreatic Adenocarcinoma ◽  
Objective Response ◽  
Metastatic Breast ◽  
Germline Mutations ◽  
Response To Treatment ◽  
Homologous Recombination Repair ◽  
Dna Breaks ◽  
Recombination Repair

The homologous recombination repair (HRR) pathway repairs double-strand DNA breaks, mostly by BRCA1 and BRCA2, although other proteins such as ATM, CHEK2, and PALB2 are also involved. BRCA1/2 germline mutations are targeted by PARP inhibitors. The aim of this commentary is to explore whether germline mutations in HRR-related genes other than BRCA1/2 have to be considered as prognostic factors or predictive to therapies by discussing the results of two articles published in December 2020. The TBCRC 048 trial published by Tung et al. showed an impressive objective response rate to olaparib in metastatic breast cancer patients with germline PALB2 mutation compared to germline ATM and CHEK2 mutation carriers. Additionally, Yadav et al. observed a significantly longer overall survival in pancreatic adenocarcinoma patients with germline HRR mutations compared to non-carriers. In our opinion, assuming that PALB2 is a high-penetrant gene with a key role in the HRR system, PALB2 mutations are predictive factors for response to treatment. Moreover, germline mutations in the ATM gene provide a better outcome in pancreatic adenocarcinoma, being more often associated to wild-type KRAS. In conclusion, sequencing of HRR-related genes other than BRCA1/2 should be routinely offered as part of a biological characterization of pancreatic and breast cancers.

scholarly journals Homologous Recombination Repair Polymorphisms and the Risk for Osteosarcoma / Polimorfizam Gena Odgovornih Za Reparaciju Dnk Homolognom Rekombinacijom I Rizikza Pojavu Osteosarkoma

2015 ◽  
Vol 34 (2) ◽  
pp. 200-206 ◽  
Author(s):  
Katja Goričar ◽  
Viljem Kovač ◽  
Janez Jazbec ◽  
Janez Lamovec ◽  
Vita Dolžan
Keyword(s):  
Dna Repair ◽  
Homologous Recombination ◽  
Genome Stability ◽  
Cancer Susceptibility ◽  
Homologous Recombination Repair ◽  
Nucleotide Polymorphisms ◽  
Dna Repair Mechanisms ◽  
Recombination Repair ◽  
Repair Mechanisms ◽  
Repair Genes

Summary Background: DNA repair mechanisms are essential for maintaining genome stability, and genetic variability in DNA repair genes may contribute to cancer susceptibility. Our aim was to evaluate the influence of polymorphisms in the homologous recombination repair genes XRCC3, RAD51, and NBN on the risk for osteosarcoma. Methods: In total, 79 osteosarcoma cases and 373 controls were genotyped for eight single nucleotide polymorphisms (SNPs) in XRCC3, RAD51, and NBN. Logistic regression was used to determine the association of these SNPs with risk for osteosarcoma. Results: None of the investigated SNPs was associated with risk for osteosarcoma in the whole cohort of patients, however, in patients diagnosed before the age of thirty years XRCC3 rs861539 C>T and NBN rs1805794 G>C were associated with significantly decreased risk for osteosarcoma (P=0.047, OR=0.54, 95% CI=0.30-0.99 and P=0.036, OR=0.42, 95% CI=0.19-0.94, respectively). Moreover, in the carriers of a combination of polymorphic alleles in both SNPs risk for osteosarcoma was decreased even more significantly (Ptrend=0.007). The risk for developing osteosarcoma was the lowest in patients with no wild-type alleles for both SNPs (P=0.039, OR=0.31, 95% CI=0.10-0.94). Conclusions: Our results suggest that polymorphisms in homologous recombination repair genes might contribute to risk for osteosarcoma in patients diagnosed below the age of thirty years.

scholarly journals New single nucleotide polymorphisms (SNPs) in homologous recombination repair genes detected by microarray analysis in Polish breast cancer patients

2016 ◽  
Author(s):  
Hanna Romanowicz ◽  
Dominik Strapagiel ◽  
Marcin Slomka ◽  
Marta Sobalska-Kwapis ◽  
Ewa Kepka ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Homologous Recombination ◽  
Single Nucleotide Polymorphisms ◽  
Cancer Patients ◽  
Homologous Recombination Repair ◽  
Nucleotide Polymorphisms ◽  
Breast Cancer Patients ◽  
Single Nucleotide ◽  
Recombination Repair ◽  
Repair Genes

Purpose of the study: Breast cancer is the most common cause of malignancy mortality in women worldwide. This study aimed at localising homologous recombination repair (HR) genes and their chromosomal loci and correlating their nucleotide variants with susceptibility to breast cancer. In this study authors analysed the association between single nucleotide polymorphisms (SNPs) in homologous recombination repair genes and the incidence of breast cancer in the population of Polish women. Methods: Blood samples from 94 breast cancer patients were analysed as test group. Individuals were recruited into the study at the Department of Oncological Surgery and Breast Diseases of the Institute of the Polish Mother Memorial Hospital in Lodz, Poland. Healthy controls (n=500) were obtained from the Biobank Laboratory, Department of Molecular Biophysics, University of Lodz. Then, DNA of breast cancer patients was compared with one of disease-free women. The test was supported by microarray analysis. Results: Statistically significant correlations were identified between breast cancer and 3 not described previously single nucleotide polymorphisms (SNPs) of homologous recombination repair genes BRCA1 and BRCA2: rs59004709, rs4986852 and rs1799950. Conclusions: Further studies on larger groups are warranted to support the hypothesis of correlation between the above-mentioned genetic variants and breast cancer risk.

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