Distinct K-ras mutation pattern characterizes signet ring cell colorectal carcinoma

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dc.contributor.authorWistuba, II
dc.contributor.authorBehrens, C
dc.contributor.authorAlbores Saavedra, J
dc.contributor.authorDelgado, R
dc.contributor.authorLopez, F
dc.contributor.authorGazdar, AF
dc.date.accessioned2024-01-10T13:47:39Z
dc.date.available2024-01-10T13:47:39Z
dc.date.issued2003
dc.description.abstractPurpose: Signet ring cell colorectal carcinoma (SRCCC) represents a unique, infrequent, and highly malignant variant of colorectal cancer. To understand the pathogenesis of SRCCC, we investigated its molecular abnormalities and compared them with those of the usual type of colorectal adenocarcinoma.
dc.description.abstractExperimental Design: Microdissected archival paraffin-embedded tissue from 16 SRCCCs and 27 non-SRCCCs was used to determine the frequency and pattern of mutation at codons 12, 13, and 61 of K-ras. A subset of tumors was examined for TP53 mutations at exons 5-8 and allele loss and genetic instability using seven microsatellite and two mononucleotide markers.
dc.description.abstractResults: Comparable data on TP53 mutation, allele loss, and microsatellite instability were found between SRCCC and non-SRCCC. However, SRCCCs demonstrated a distinct pattern of K-ras mutation with a significantly lower frequency of mutations at codons 12 and 13 (13% versus 48%, P = 0.02) as compared with the non-SRCCCs. Four cases (25%), of SRCCC demonstrated the same A:T transversion at the third base position of K-ras codon 61 (CAA to CAT; Gln to His). No such point mutation was detected in non-SRCCCs or in the 30 gastric and 4 urinary bladder signet ring cell carcinomas examined.
dc.description.abstractConclusions: Our findings suggest that a distinct pattern of K-ras mutation is present in SRCCC, including a specific codon 61 mutation that has rarely been reported in human neoplasms.
dc.format.extent5 páginas
dc.fuente.origenWOS
dc.identifier.eissn1557-3265
dc.identifier.issn1078-0432
dc.identifier.pubmedidMEDLINE:14506148
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/79291
dc.identifier.wosidWOS:000185548300013
dc.information.autorucMedicina;López L;S/I;77800
dc.issue.numero10
dc.language.isoen
dc.nota.accesoSin adjunto
dc.pagina.final3619
dc.pagina.inicio3615
dc.publisherAMER ASSOC CANCER RESEARCH
dc.revistaCLINICAL CANCER RESEARCH
dc.rightsregistro bibliográfico
dc.subjectMICROSATELLITE INSTABILITY
dc.subjectDIFFERENTIAL ACTIVATION
dc.subjectCANCER
dc.subjectCOLON
dc.subjectLUNG
dc.subjectPROTOONCOGENE
dc.subjectPATHOGENESIS
dc.subjectGENES
dc.subject.ods03 Good Health and Well-being
dc.subject.odspa03 Salud y bienestar
dc.titleDistinct K-ras mutation pattern characterizes signet ring cell colorectal carcinoma
dc.typeartículo
dc.volumen9
sipa.codpersvinculados77800
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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