Detection of KRAS,NRAS and BRAF gene mutations in colorectal carcinoma / 中华病理学杂志
Chinese Journal of Pathology
;
(12): 254-257, 2015.
Article
in Chinese
| WPRIM
| ID: wpr-298124
ABSTRACT
<p><b>OBJECTIVE</b>To investigate mutations frequencies of KRAS,NRAS and BRAF genes in colorectal carcinoma.</p><p><b>METHODS</b>Tissue specimens from 200 colorectal cancer patients at diagnosis were collected and subject to KRAS,NRAS and BRAF mutation analyses by PCR-based direct DNA sequencing targeting exons 2, 3 and 4 of KRAS gene, exons 2, 3 and 4 of NRAS gene and exon 15 of BRAF gene.</p><p><b>RESULTS</b>Activating mutations were detected in KRAS (44%, 88/200), NRAS (2%, 4/200) and BRAF (5%, 10/200) in this study cohort.Among KRAS mutations, 64.8% (57/88) occurred in codon 12 and 12.5% (11/88) occurred in codon 13. KRAS gene mutation in exon 3 mainly involved codons 59 and 61. KRAS gene mutation in exon 4 mainly involved codons 117 and 146.</p><p><b>CONCLUSIONS</b>Mutations at exon 2 of KRAS gene have the highest frequency in colorectal carcinoma. Expanding the detection sites of KRAS gene combined with NRAS and BRAF genes may help to identify patients who will most likely benefit from targeted therapies.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Codon
/
DNA Mutational Analysis
/
Base Sequence
/
Colorectal Neoplasms
/
Exons
/
Genes, ras
/
Proto-Oncogene Proteins
/
Sequence Analysis, DNA
/
Proto-Oncogene Proteins B-raf
/
Genetics
Type of study:
Diagnostic study
Limits:
Female
/
Humans
Language:
Chinese
Journal:
Chinese Journal of Pathology
Year:
2015
Type:
Article
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