نتایج جستجو برای: colorectal
تعداد نتایج: 81558 فیلتر نتایج به سال:
Abstract Background: Sporadic colorectal cancer is the fourth most common cancer in Iran. The DNA repair protein O6-methylguanine-DNA methyltransferase (MGMT) is involved in the cellular defense against alkylating agents. Genetic alterations in the MGMT gene may impair the protein’s ability to remove alkyl groups from the O6-position of guanine, thereby raising the mutation rate and increasi...
Background: Kirsten rat sarcoma (KRAS) gene is a target of genetic alterations which are diagnostic and prognostic biomarkers in patients with metastatic colorectal cancer who are treated with monoclonal anti-EGFR antibodies such as cetuximab and panitumumab. KRAS mutations are seen in 35-42% of patients with colorectal cancer. The high frequency of these mutations in colorectal cancer represen...
background: colorectal cancer is one of the most common malignancies worldwide with more than one million new cases. according to the ministry of health and medical education of iran, colorectal cancer is the third most common cancer in iran. many risk factors are known causes of this disease. however, the molecular mechanisms associated with colorectal cancer are still under investigation. rec...
this study was carried out to analyze certain epidemiological variations in iranian patients with colorectal cancer. (crc): from march 1981 up to march 1993, 103 patients were analyzed retrospectively for age, gender, marital state, job, nutritional habits, presenting symptoms and histopathological features. most of the patients with colorectal cancer were male, age range 20-75 (mean 56), 25.4 ...
aim : to evaluate the association of dnmt1 and mgmt amino acid substitution polymorphisms and colorectal cancer in iranian population. background : the mgmt and dnmt1 are two important methyltransferase enzymes. amino acid substitution polymorphisms in mgmt and dnmt1 genes may be associated with the genetic susceptibility to sporadic colorectal cancer. patients and methods : we assessed eight ...
Background: Gastric and colorectal adenocarcinoma are the second and the fifth most common cancers in Iran, respectively. Expression of cytokeratin 7 (CK7) is established in most malignancies including gastric and colorectal adenocarcinoma. Demonstration of Ck7 could be related to prognostic factors and help to the better management of the patients. The objective of our study was to evalu...
Introduction & Objective: One candidate gene for colorectal cancer susceptibility is exonuclease1 (EXO1) .It is a member of RAD2 nuclease family. It plays a main role in mismatch repair. EXO1 acts also in DNA replication and recombination. Single nucleotide polymorphisms (SNPs) are shown to be related with cancer incidence. The aim of the present study was to examine the association between P...
Background: MUTYH DNA glycosylase germline mutations are linked to the recessive inheritance of multiple adenoma. Studies have revealed that germline mutations in this gene are ethnicity related. This study aimed to identify the germline mutations in MUTYH gene and determine their prevalence among Jordanian patients with colorectal adenoma. Methods: In this study, 150 colorectal adenoma patient...
Colorectal cancer (CRC) is one of the most common types of cancers worldwide. Despite the improved therapeutic and diagnostic strategies and screening programs, morbidity and mortality of CRC is still considerable. Currently, most common approaches for diagnosis of CRC are colonoscopy and fecal occult blood test (FOBT). Because of the invasive nature of colonoscopy and low sensitivity of FOBT, ...
colorectal cancer (crc) is the second leading cause of cancer death. progress has been made in the development of chemotherapy for advanced crc. targeted therapies against vegf or egfr are now commonly used. however, many cases show that tolerance develops to such treatments; therefore, new strategies are required to replace or complement current therapies. nuclear factor-?b (nf-?b) transcripti...
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