نتایج جستجو برای: microsatellite instability
تعداد نتایج: 104982 فیلتر نتایج به سال:
Mice deficient in 2-microglobulin and interleukin 2 ( 2m null IL2) spontaneously develop colon cancer in the setting of chronic ulcerative colitis (UC). We investigated mutations of the Apc and p53 genes and microsatellite instability in colonic adenocarcinomas arising in this model. Mutations of the Apc and p53 genes in the regions corresponding to mutation hot spots in human colorectal cancer...
Microsatellites are short nucleotide repeat sequences present throughout the human genome. Alterations of microsatellites, comprising extra or missing copies of these sequences, have been termed microsatellite instability. This abnormality occurs in sporadic and hereditary adenocarcinomas of the proximal colon, as well as in many other tumor types. We determined whether microsatellite instabili...
The development of neoplasia has been thought to be associated with genetic alterations for many years. In colorectal cancer two specific types of genetic instability have been defined. One is associated with chromosomal instability and the other with DNA microsatellite instability, also known as replication errors. The mechanism underlying tumorigenesis leads to profound diVerences in the path...
BACKGROUND AND OBJECTIVES The frequency of microsatellite instability (MSI) in young patients with colorectal cancer was evaluated, including reexamination of the medical and family history of each patient, and interviews with the patients to determine any possible new occurrence of hereditary nonpolyposis colorectal cancer (HNPCC) in the patients themselves or their family members. METHODS F...
The significance of low-level DNA microsatellite instability (MSI-L) is not well understood. K-ras mutation is associated with MSI-L colorectal cancer and with the silencing of the DNA repair gene O–6-methylguanine DNA methyltransferase (MGMT) by methylation of its promoter region. MGMT methylation was studied in sporadic colorectal cancers stratified as DNA microsatellite instability-high (n 5...
The development of neoplasia has been thought to be associated with genetic alterations for many years. In colorectal cancer two specific types of genetic instability have been defined. One is associated with chromosomal instability and the other with DNA microsatellite instability, also known as replication errors. The mechanism underlying tumorigenesis leads to profound diVerences in the path...
The development of neoplasia has been thought to be associated with genetic alterations for many years. In colorectal cancer two specific types of genetic instability have been defined. One is associated with chromosomal instability and the other with DNA microsatellite instability, also known as replication errors. The mechanism underlying tumorigenesis leads to profound diVerences in the path...
BACKGROUND Colorectal cancer (CRC) is one of the most common cancers worldwide. Microsatellite instability (MSI) is detected in about 15% of all colorectal cancers. CRC with MSI has particular characteristics such as improved survival rates and better prognosis. They also have a distinct sensitivity to the action of chemotherapy. AIM The aim of the study was to detect microsatellite instabili...
BACKGROUND Genome-wide association studies (GWAS) have led to the identification of a number of common susceptibility loci for colorectal cancer (CRC); however, none of these GWAS have considered gene-environment (G × E) interactions. Therefore, it is unclear whether current hits are modified by environmental exposures or whether there are additional hits whose effects are dependent on environm...
Microsatellite analysis is an important tool in clinical research and molecular diagnostics because microsatellite instability (MSI) occurs frequently in various types of cancer. Approximately 10-15% of colorectal, gastric and endometrial carcinomas are associated with MSI, and this has an impact on clinical prognosis. The microsatellite loci Bat25, Bat26, D2S123, D5S346 and D17S250, recommende...
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