Point Mutation of c-Ki-ras Oncogene in Gastric Adenoma and Adenocarcinoma with Tubular Differentiation
نویسندگان
چکیده
منابع مشابه
K-RAS point mutation, and amplification of C-MYC and C-ERBB2 in colon adenocarcinoma.
The routine multidisciplinary management of colon cancer is based mainly on tumor staging, histology, grading and vascular invasion. In this approach, important individual information derived from molecular characteristics of the tumor may be missed, especially since significant heterogeneity of molecular aberrations in cancer cells has been observed, and recognition of every of relationships b...
متن کاملPoint mutation at codon 12 of the c-Ha-ras gene in human gastric cancers.
The molecular mechanisms of the carcinogenic process of gastric cancer have not been fully understood yet. In order to know whether c-Ha-ras gene is being involved in the process of gastric carcinogenesis, 8 gastric cancer cell lines, 8 cases of gastric cancer and same number of adjacent dysplasia were analyzed for the presence of mutation at codon 12, 13 and 61 of the c-Ha-ras gene by using po...
متن کاملc-Ki-ras oncogene amplification and FGF2 signaling pathways in the mouse Y1 adrenocortical cell line.
The mouse Y1 adrenocortical tumor cell line is highly responsive to FGF2-(Fibroblast Growth Factor 2) and possesses amplified and over-expressed c-Ki-ras proto-oncogene. We previously reported that this genetic lesion leads to high constitutive levels of activation of the c-Ki-Ras-GTP-->PI3K-->Akt signaling pathway (Forti et al. 2002). On the other hand, activation levels of another important p...
متن کاملAssociations of Ki-ras proto-oncogene mutation and p53 gene overexpression in sporadic colorectal adenomas with demographic and clinicopathologic characteristics.
In colorectal tumorigenesis, Ki-ras proto-oncogene mutation often occurs early in the adenoma-adenocarcinoma sequence, whereas mutation of the p53 gene is associated with late progression to carcinoma. We evaluated the relationship of demographic and clinicopathologic characteristics to Ki-ras mutation and p53 gene product overexpression in 1,093 baseline sporadic colorectal adenomas from 926 i...
متن کاملRas oncogene mutation in multiple myeloma
The frequency of ras (H-, K-, and N-ras) and c-myc oncogenes was investigated in multiple myeloma (MM). By means of the polymerase chain reaction (PCR)/oligonucleotide hybridization method, DNA from 56 tumor biopsies was analyzed for the presence of activating mutations involving codons 12 and 61 of the H-, K-, and N-ras genes and codon 13 of the N-ras gene. Mutations, involving the N- or K-ras...
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ژورنال
عنوان ژورنال: Japanese Journal of Cancer Research
سال: 1991
ISSN: 0910-5050
DOI: 10.1111/j.1349-7006.1991.tb01847.x