scholarly journals KRAS mutation‐independent downregulation of MAPK/PI3K signaling in colorectal cancer

2021 ◽  
Author(s):  
Kuen Kuen Lam ◽  
Choong Leong Tang ◽  
Emile Tan ◽  
Siew Heng Wong ◽  
Peh Yean Cheah
Keyword(s):  
Colorectal Cancer ◽  
Kras Mutation ◽  
Pi3k Signaling

INVESTIGATION KRAS MUTATION IN CIRCULATION TUMOR DNA IN DIFFERENT STAGES OF COLORECTAL CANCER

2019 ◽  
Vol 65 (5) ◽  
pp. 701-707
Author(s):  
Vitaliy Shubin ◽  
Yuriy Shelygin ◽  
Sergey Achkasov ◽  
Yevgeniy Rybakov ◽  
Aleksey Ponomarenko ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Plasma Volume ◽  
Kras Mutation ◽  
Stage Iv ◽  
Circulating Tumor Dna ◽  
Stage Ii ◽  
Kras Gene ◽  
Kras Mutations ◽  
Droplet Pcr ◽  
Tumor Dna

To determine mutations in the plasma KRAS gene in patients with colorectal cancer was the aim of this study. The material was obtained from 44 patients with colorectal cancer of different stages (T1-4N0-2bM0-1c). Plasma for the presence of KRAS gene mutation in circulating tumor DNA was investigated using digital droplet polymerase chain reaction (PCR). KRAS mutations in circulating tumor DNA isolated from 1 ml of plasma were detected in 13 (30%) patients with cancer of different stages. Of these, with stage II, there were 3 patients, with III - 5 and with IV - 5. Patients who did not have mutations in 1 ml of plasma were analyzed for mutations of KRAS in circulating tumor DNA isolated from 3 ml of plasma. Five more patients with KRAS mutations were found with II and III stages. The highest concentrations of circulating tumor DNA with KRAS mutation were found in patients with stage IV. The increase in plasma volume to 3 ml did not lead to the identification of mutations in I stage. This study showed that digital droplet PCR allows identification of circulating tumor DNA with the KRAS mutations in patients with stage II-IV of colon cancer. The results can be used to determine the degree of aggressiveness of the tumor at different stages of the disease, but not the 1st, and it is recommended to use a plasma volume of at least 3 ml.

scholarly journals KRAS mutation analysis: a comparison between primary tumours and matched liver metastases in 305 colorectal cancer patients

2011 ◽  
Vol 104 (6) ◽  
pp. 1020-1026 ◽  
Author(s):  
N Knijn ◽  
L J M Mekenkamp ◽  
M Klomp ◽  
M E Vink-Börger ◽  
J Tol ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Liver Metastases ◽  
Cancer Patients ◽  
Mutation Analysis ◽  
Kras Mutation ◽  
Colorectal Cancer Patients

scholarly journals Discordance of KRAS Mutational Status between Primary Tumors and Liver Metastases in Colorectal Cancer: Impact on Long-Term Survival Following Radical Resection

Cancers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 2148
Author(s):  
Francesco Ardito ◽  
Francesco Razionale ◽  
Lisa Salvatore ◽  
Tonia Cenci ◽  
Maria Vellone ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Liver Metastases ◽  
Primary Tumor ◽  
Kras Mutation ◽  
Colorectal Tumor ◽  
Term Survival ◽  
Primary Tumors ◽  
Mutation Status ◽  
Primary Colorectal Tumor ◽  
Kras Mutation Status

If KRAS mutation status of primary colorectal tumor is representative of corresponding colorectal liver metastases (CRLM) mutational pattern, is controversial. Several studies have reported different rates of KRAS discordance, ranging from 4 to 32%. Aim of this study is to assess the incidence of discordance and its impact on overall survival (OS) in a homogenous group of patients. KRAS mutation status was evaluated in 107 patients resected for both primary colorectal tumor and corresponding CRLM at the same institution, between 2007 and 2018. Discordance rate was 15.9%. Its incidence varied according to the time interval between the two mutation analyses (p = 0.025; Pearson correlation = 0.2) and it was significantly higher during the first 6 months from the time of primary tumor evaluation. On multivariable analysis, type of discordance (wild-type in primary tumor, mutation in CRLM) was the strongest predictor of poor OS (p < 0.001). At multivariable logistic regression analysis, the number of CRLM >3 was an independent risk factor for the risk of KRAS discordance associated with the worst prognosis (OR = 4.600; p = 0.047). Results of our study suggested that, in the era of precision medicine, possibility of KRAS discordance should be taken into account within multidisciplinary management of patients with metastatic colorectal cancer.

scholarly journals KRAS mutation testing in colorectal cancer as an example of the pathologist’s role in personalized targeted therapy: a practical approach

2012 ◽  
Vol 3 ◽  
pp. 145-164 ◽  
Author(s):  
Paweł Domagała ◽  
Jolanta Hybiak ◽  
Violetta Sulżyc-Bielicka ◽  
Cezary Cybulski ◽  
Janusz Ryś ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Targeted Therapy ◽  
Kras Mutation ◽  
Mutation Testing ◽  
Practical Approach

scholarly journals KRAS mutation analysis of single circulating tumor cells from patients with metastatic colorectal cancer

BMC Cancer ◽  
2017 ◽  
Vol 17 (1) ◽  
Author(s):  
Yuurin Kondo ◽  
Kazuhiko Hayashi ◽  
Kazuyuki Kawakami ◽  
Yukari Miwa ◽  
Hiroshi Hayashi ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Metastatic Colorectal Cancer ◽  
Tumor Cells ◽  
Circulating Tumor Cells ◽  
Mutation Analysis ◽  
Kras Mutation

Positive association of PIK3CA mutation with KRAS mutation but not BRAF mutation in colorectal cancer suggests co-selection is gene specific but not pathway specific

2018 ◽  
Vol 72 (3) ◽  
pp. 263-264
Author(s):  
Susanti Susanti ◽  
Wakkas Fadhil ◽  
Shamayal Murtaza ◽  
James C Hassall ◽  
Henry O Ebili ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Braf Mutation ◽  
Kras Mutation ◽  
Pik3ca Mutation ◽  
Positive Association

scholarly journals Association of KRAS mutation with tumor deposit status and overall survival of colorectal cancer

2020 ◽  
Vol 31 (7) ◽  
pp. 683-689 ◽  
Author(s):  
Meifang Zhang ◽  
Wenwei Hu ◽  
Kun Hu ◽  
Yong Lin ◽  
Zhaohui Feng ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Overall Survival ◽  
Kras Mutation ◽  
Tumor Deposit

scholarly journals IMPACT OF KRAS MUTATIONS IN CLINICAL FEATURES IN COLORECTAL CANCER

2020 ◽  
Vol 33 (3) ◽  
Author(s):  
Renato Morato ZANATTO ◽  
Gianni SANTOS ◽  
Júnea Caris OLIVEIRA ◽  
Eduardo Marcucci PRACUCHO ◽  
Adauto José Ferreira NUNES ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Overall Survival ◽  
Kras Mutation ◽  
Direct Sequencing ◽  
Colorectal Carcinogenesis ◽  
Kras Mutations ◽  
Primary Tumor Site ◽  
Exon 2 ◽  
Metastatic Site ◽  
Colorectal Cancer Patients

ABSTRACT Background: KRAS mutations are important events in colorectal carcinogenesis, as well as negative predictors of response to EGFR inhibitors treatment. Aim: To investigate the association of clinical-pathological features with KRAS mutations in colorectal cancer patients treated. Methods: Data from 69 patients with colorectal cancer either metastatic at diagnosis or later, were retrospectively analyzed. The direct sequencing and pyrosequencing techniques were related to KRAS exon 2. The mutation diagnosis and its type were determined. Results: KRAS mutation was identified in 43.4% of patients. The most common was c.35G>T (p.G12V), c.35G>A (p.G12D) and c.38G>A (p.G13D). No correlation was found between KRAS mutation and age (p=0.646) or gender (p=0.815). However, mutated group had higher CEA levels at admission (p=0.048) and codon 13 mutation was associated with involvement of more than one metastatic site in disease progression (p=0.029). Although there was no association between primary tumor site and mutation diagnosis (p=0.568), primary colon was associated with worse overall survival (p=0.009). Conclusion: The KRAS mutation was identified in almost half of patients. Mutated KRAS group had higher levels of CEA at admission and the mutation at codon 13 was associated with involvement of more than one metastatic site in the course of the disease. Colon disease was associated with the worst overall survival.

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