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Erlotinib, a small-molecule epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor, has been shown to have potent antitumor effects against human non-small-cell lung cancer (NSCLC) cell growth; however, the mechanism of such an effect is not elucidated. Here, we demonstrate that erlotinib-induced cell growth inhibition in EGFR high-expressing(More)
In an established colon differentiation model, introduction of a c-H-ras-1 oncogene into a poorly differentiated human colon carcinoma cell line (Clone A) results in changes associated with the acquisition of a more differentiated phenotype. Down-regulation of mdr-1 mRNA was shown to accompany ras-related differentiation events resulting in decreased Pgp(More)
The clinical classification of hereditary sequence variants identified in disease-related genes directly affects clinical management of patients and their relatives. The International Society for Gastrointestinal Hereditary Tumours (InSiGHT) undertook a collaborative effort to develop, test and apply a standardized classification scheme to constitutional(More)
In this study we report detection of mdr1 gene expression in the liver metastases of 7/11 patients with colon carcinoma and characterise the MDR phenotype associated with a panel of 19 human colon carcinoma cell lines. Within this panel, mdr1 mRNA biosynthesis and surface localisation of Pgp were assessed with respect to MDR functionality where the cell(More)
An exacerbated genomic instability at simple repeated sequences characterizes cancer of the microsatellite mutator phenotype (MMP). The majority of hereditary nonpolyposis colon cancers (HNPCCs) and about 15% of nonselected ("sporadic") gastrointestinal tumors belong to the MMP pathway of tumorigenesis. Colorectal MMP+ and MMP- tumors exhibit fundamental(More)
OBJECTIVES In 2003, in response to low colonoscopy screening rates and significant sociodemographic disparities in colonoscopy screening in New York City (NYC), the NYC Department of Health and Mental Hygiene, together with the Citywide Colon Cancer Control Coalition, launched a multifaceted campaign to increase screening. We evaluated colonoscopy trends(More)
BACKGROUND Mutations of the p53 tumor suppressor gene play an integral role in sporadic colorectal carcinogenesis but prior studies have failed to show their prognostic significance consistently. METHODS Fifty-six consecutive sporadic colorectal tumors were analyzed for their p53 status. Polymerase chain reaction amplification with primers for exons 5-9(More)
BACKGROUND The term pseudomyxoma peritonei has been used in reference to any condition, benign or malignant, in which the peritoneal cavity becomes filled with a gelatinous substance. The term is nonspecific and does not denote therapeutic or prognostic significance. Controversy centers around which patients benefit from and should be treated by aggressive(More)
The use of colonoscopy in colorectal cancer (CRC) screening has increased substantially in recent years. Media messages and changes in insurance reimbursement, as well as new screening guidelines from the American Cancer Society and the US Preventive Services Task Force, have contributed to this increase. Primary care providers (PCPs) are frequently(More)
BACKGROUND The clinical significance of metastases in small lymph nodes is not known. Our objective was to evaluate possible relationships between the number and size of lymph node metastases and survival after potentially curative colorectal resection. METHODS A retrospective chart review was performed in patients with Dukes'C (any T, N(1-3') M0)(More)