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Cancer stem cells (CSCs) are generally dormant or slowly cycling tumor cells that have the ability to reconstitute tumors. They are thought to be involved in tumor resistance to chemo/radiation therapy and tumor relapse and progression. However, neither their existence nor their identity within many cancers has been well defined. Here, we have demonstrated(More)
There are few DNA-based studies that detect cancer micrometastases in lymph nodes. We have assayed for the specific detection of carcinoembryonic antigen (CEA)-expressing carcinoma cells in the lymph nodes of patients with gastrointestinal or breast carcinomas. A CEA-specific nested reverse transcriptase (RT)-PCR assay was optimized using limiting dilutions(More)
A subset of stem cells, termed "side population" (SP) cells, has been identified and characterized in several mammalian tissues and cell lines. However, SP cells have never been identified or isolated from gastrointestinal cancers. We used flow cytometry and the DNA-binding dye Hoechst 33342 to isolate SP cells from various human gastrointestinal system(More)
Tumor angiogenesis progresses by a dynamic balance between tumor vascular regression and growth. Angiopoietin (Ang)-2 (the natural antagonist for the angiogenic Tie-2 receptor) and vascular endothelial growth factor (VEGF) are thought to be critical regulators in this process; therefore, these may play a critical role in cancer aggressiveness. The aim of(More)
Detection of the mRNA of selected genes by reverse transcriptase-polymerase chain reaction (RT-PCR) is a sensitive and powerful tool for detecting cancer cells in bone-marrow or peripheral-blood samples. In this study, we determined whether carcinoembryonic antigen (CEA) mRNA is detectable in the peripheral blood of patients with gastrointestinal or breast(More)
OBJECTIVES Interleukin-8 (IL-8) as an alpha-chemokine recruits and activates neutrophils, which are abundant in the intestinal lesions of ulcerative colitis (UC) and Crohn's disease (CD). Stromal cell-derived factor 1 (SDF1-alpha) is a new chemokine that is chemotactic to neutrophils. The aims of this study were to assess the relative expression of(More)
For cost-effective diagnosis of porphyric syndromes, a logical stepwise approach is best. If neurovisceral features suggest an acute porphyric syndrome, a rapid screening test for urinary porphobilinogen should be performed. If clinical features suggest a cutaneous porphyria, then for solar urticaria and acute photosensitivity (suggesting protoporphyria)(More)
Tumor angiogenesis is essential for tumor growth and tumor metastasis, and it depends on angiogenic factors produced by tumor cells and/or infiltrating cells in tumor tissue. In this study, we evaluated the clinical significance of the expression of angiogenin, which is a potent angiogenic protein, and the relationship between its mRNA expression and focal(More)
PURPOSE This study evaluates the clinical significance of detection of carcinoembryonic antigen (CEA) mRNA in the dissected lymph nodes and peripheral blood samples of patients with gastrointestinal or breast carcinomas. PATIENTS AND METHODS A total of 406 lymph nodes obtained from 65 patients were analyzed by both histologic and molecular examination of(More)
It is important to detect genes that may be good prognostic markers for colon cancer patients. With this in mind, we identified the motility related protein-1 (MRP1/CD9) gene in human colon tissues. The aim of this study was to clarify the significance of MRP1/CD9 gene expression in human colon cancers. We performed the differential mRNA display technique(More)