scholarly journals Prognostic and Predictive Value of CpG Island Methylator Phenotype in Patients with Locally Advanced Nonmetastatic Sporadic Colorectal Cancer

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Yuwei Wang ◽  
Yadong Long ◽  
Ye Xu ◽  
Zuqing Guan ◽  
Peng Lian ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Adjuvant Chemotherapy ◽  
Cancer Patients ◽  
Cpg Island ◽  
Locally Advanced ◽  
Stage Ii ◽  
Sporadic Colorectal Cancer ◽  
Cpg Island Methylator Phenotype ◽  
Methylator Phenotype ◽  
Colorectal Cancer Patients

Purpose. In the present study, the prognostic significance of CpG island methylator phenotype (CIMP) in stage II/III sporadic colorectal cancer was evaluated using a five-gene panel.Methods. Fifty stage II/III colorectal cancer patients who received radical resection were included in this study. Promoter methylation of p14ARF, hMLH1, p16INK4a, MGMT, and MINT1 was determined by methylation specific polymerase chain reaction (MSP). CIMP positive was defined as hypermethylation of three or more of the five genes. Impact factors on disease-free survival (DFS) and overall survival (OS) were analyzed using Kaplan-Meier method (log-rank test) and adjusted Cox proportional hazards model.Results. Twenty-four percent (12/50) of patients were characterized as CIMP positive. Univariate analysis showed stage III (P=0.049) and CIMP positive (P=0.014) patients who had significantly inferior DFS. In Cox regression analysis, CIMP positive epigenotype was independently related with poor DFS with HR = 2.935 and 95% CI: 1.193–7.220 (P=0.019). In patients with CIMP positive tumor, those receiving adjuvant chemotherapy had a poor DFS than those without adjuvant chemotherapy (P=0.023).Conclusions. CIMP positive was significantly correlated with decreased DFS in stage II/III colorectal cancer. Patients with CIMP positive locally advanced sporadic colorectal cancers may not benefit from 5-fluorouracil based adjuvant chemotherapy.

Abstract 4798: CpG island methylator phenotype (CIMP) in Puerto Rican Hispanic colorectal cancer patients

2011 ◽  
Author(s):  
Raul D. Bernabe-Dones ◽  
Marcia R. Cruz-Correa ◽  
Cristina I. Castro ◽  
Mercedes Y. Lacourt ◽  
Heriberto Rodriguez ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Puerto Rican ◽  
Cancer Patients ◽  
Cpg Island ◽  
Cpg Island Methylator Phenotype ◽  
Methylator Phenotype ◽  
Colorectal Cancer Patients

Clinical and Socioeconomic Factors that Predict Non-completion of Adjuvant Chemotherapy for Colorectal Cancer in a Rural Cancer Center

2022 ◽  
pp. 000313482110547
Author(s):  
Chelsea Knotts ◽  
Alexandra Van Horn ◽  
Krysta Orminski ◽  
Stephanie Thompson ◽  
Jacob Minor ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Adjuvant Chemotherapy ◽  
Socioeconomic Factors ◽  
Cancer Patients ◽  
Private Insurance ◽  
Stage Ii ◽  
Stage Iii ◽  
Insurance Status ◽  
Complete Treatment ◽  
Colorectal Cancer Patients

Background Previous literature demonstrates correlations between comorbidities and failure to complete adjuvant chemotherapy. Frailty and socioeconomic disparities have also been implicated in affecting cancer treatment outcomes. This study examines the effect of demographics, comorbidities, frailty, and socioeconomic status on chemotherapy completion rates in colorectal cancer patients. Methods This was an observational case-control study using retrospective data from Stage II and III colorectal cancer patients offered chemotherapy between January 01, 2013 and January 01, 2018. Data was obtained using the cancer registry, supplemented with chart review. Patients were divided based on treatment completion and compared with respect to comorbidities, age, Eastern Cooperative Oncology Group (ECOG) score, and insurance status using univariate and multivariate analyses. Results 228 patients were identified: 53 Stage II and 175 Stage III. Of these, 24.5% of Stage II and 30.3% of Stage III patients did not complete chemotherapy. Neither ECOG status nor any comorbidity predicted failure to complete treatment. Those failing to complete chemotherapy were older (64.4 vs 60.8 years, P = .043). Additionally, those with public assistance or self-pay were less likely to complete chemotherapy than those with private insurance ( P = .049). Both factors (older age/insurance status) remained significant on multivariate analysis (increasing age at diagnosis: OR 1.03, P =.034; public insurance: OR 1.84, P = .07; and self-pay status: OR 4.49, P = .03). Conclusions No comorbidity was associated with failure to complete therapy, nor was frailty, as assessed by ECOG score. Though frailty was not significant, increasing age was, possibly reflecting negative attitudes toward chemotherapy in older populations. Insurance status also predicted failure to complete treatment, suggesting disparities in access to treatment, affected by socioeconomic factors.

scholarly journals How theBRAFV600E Mutation Defines a Distinct Subgroup of Colorectal Cancer: Molecular and Clinical Implications

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Catherine E. Bond ◽  
Vicki L. J. Whitehall
Keyword(s):  
Colorectal Cancer ◽  
Cpg Island ◽  
Early Event ◽  
Sporadic Colorectal Cancer ◽  
Cpg Island Methylator Phenotype ◽  
Distinct Subgroup ◽  
Molecular Features ◽  
Map Kinase Pathway ◽  
Methylator Phenotype ◽  
Kinase Pathway

TheBRAFoncogene is an integral component of the MAP kinase pathway, and an activating V600E mutation occurs in 15% of sporadic colorectal cancer. This is an early event in serrated pathway tumourigenesis, and theBRAFV600E has been commonly associated with the CpG island methylator phenotype, microsatellite instability (MSI), and a consistent clinical presentation including a proximal location and predilection for elderly females. A proportion of theBRAFmutant lesions remain as microsatellite stable (MSS), and in contrast to the MSI cancers, they have an aggressive phenotype and correlate with poor patient outcomes. Recent studies have found that they have clinical and molecular features of both theBRAFmutant/MSI and the conventionalBRAFwild-type cancers and comprise a distinct colorectal cancer subgroup. This review highlights the importance of theBRAFmutation occurring in colorectal cancer stratified for molecular background and discusses its prognostic and clinical significance.

The role of adjuvant chemotherapy in stage II colorectal cancer patients

2014 ◽  
Vol 29 (10) ◽  
pp. 1237-1243 ◽  
Author(s):  
Hung-Hsin Lin ◽  
Yu-Yao Chang ◽  
Jen-Kou Lin ◽  
Jeng-Kai Jiang ◽  
Chun-Chi Lin ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Adjuvant Chemotherapy ◽  
Cancer Patients ◽  
Stage Ii ◽  
Stage Ii Colorectal Cancer ◽  
Colorectal Cancer Patients
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