Abstract:Point mutations of the K-RAS gene at codon 12 are found in about 40% of cases with colorectal cancer. The diagnostic implications of the detection of these mutations and their clinical utility are still unclear. The aim of this study was to test both the feasibility of the detection of the mutated K-RAS gene in serum and its potential role in colorectal cancer detection and monitoring. Codon 12 K-RAS mutations were examined in DNA extracted from the serum of 35 patients with colorectal cancer and were compared… Show more
“…Several researchers support the theory that tumor DNA is enriched in the blood (13)(14)(15)(16)(17)(18). The use of molecular analysis of gene mutations in plasma or serum DNA as a diagnostic tool for detecting colorectal cancer was first reported by Anker (19) and successfully confirmed by several other studies (20)(21)(22)(23)(24)(25)(26), including one of our previous studies (27). Concordance of tissue and serum KRAS2 mutation was reported in 20-70% of colorectal cancer patients.…”
Section: Introductionmentioning
confidence: 63%
“…The specificity of KRAS2 mutations in colorectal cancer was established in our previous study (27) where no KRAS2 mutations were detected in 22 specimens obtained from non-malignant diseases of the colon.…”
Section: Patients and Samplesmentioning
confidence: 99%
“…The ME-PCR conditions and the primer sequences used were described in our previous study (27). Muta- (27).…”
Section: Dna Analysis In Serum and Tissue Samplesmentioning
confidence: 99%
“…Tissue and serum DNA were extracted on QIAamp spin columns (Qiagen, Hilden, Germany) according to a previously described protocol (27). DNA was then stored at -20°C in buffer AL (Qiagen) until use.…”
Section: Patients and Samplesmentioning
confidence: 99%
“…The DNA analyses were carried out using a method described elsewhere (27). KRAS2 codon 12 gene mutations in serum samples were detected by mutant-enriched PCR (ME-PCR) in which the primer sense was designed to introduce a restriction site for the BstNI enzyme only in wildtype KRAS2 codon 12.…”
Section: Dna Analysis In Serum and Tissue Samplesmentioning
“…Several researchers support the theory that tumor DNA is enriched in the blood (13)(14)(15)(16)(17)(18). The use of molecular analysis of gene mutations in plasma or serum DNA as a diagnostic tool for detecting colorectal cancer was first reported by Anker (19) and successfully confirmed by several other studies (20)(21)(22)(23)(24)(25)(26), including one of our previous studies (27). Concordance of tissue and serum KRAS2 mutation was reported in 20-70% of colorectal cancer patients.…”
Section: Introductionmentioning
confidence: 63%
“…The specificity of KRAS2 mutations in colorectal cancer was established in our previous study (27) where no KRAS2 mutations were detected in 22 specimens obtained from non-malignant diseases of the colon.…”
Section: Patients and Samplesmentioning
confidence: 99%
“…The ME-PCR conditions and the primer sequences used were described in our previous study (27). Muta- (27).…”
Section: Dna Analysis In Serum and Tissue Samplesmentioning
confidence: 99%
“…Tissue and serum DNA were extracted on QIAamp spin columns (Qiagen, Hilden, Germany) according to a previously described protocol (27). DNA was then stored at -20°C in buffer AL (Qiagen) until use.…”
Section: Patients and Samplesmentioning
confidence: 99%
“…The DNA analyses were carried out using a method described elsewhere (27). KRAS2 codon 12 gene mutations in serum samples were detected by mutant-enriched PCR (ME-PCR) in which the primer sense was designed to introduce a restriction site for the BstNI enzyme only in wildtype KRAS2 codon 12.…”
Section: Dna Analysis In Serum and Tissue Samplesmentioning
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