Lgr5+CD44+EpCAM+ Strictly Defines Cancer Stem Cells in Human Colorectal Cancer. 2018

Zhengwei Leng, and Qinghua Xia, and Jinhuang Chen, and Yong Li, and Jiqian Xu, and Ende Zhao, and Hai Zheng, and Walden Ai, and Jiangchuan Dong
Hepatobiliary, Pancreatic and Intestinal Diseases Research Institute, North Sichuan Medical College, Nanchong, China.

OBJECTIVE Although EpCAM+CD44+ cells exhibit more stem-like properties than did EpCAM-CD44- cells, the specificity of EpCAM combined with CD44 in defining CSCs needs further improvement. Lgr5 is used as a biomarker to isolate cancer stem cells (CSCs) in colorectal cancer. However, it remains unclear whether Lgr5, along with EpCAM and CD44, can further identify and define CSCs in colorectal cancer. METHODS Lgr5+CD44+EpCAM+, Lgr5+CD44+EpCAM-, Lgr5+CD44-EpCAM+, Lgr5-CD44+EpCAM+, and Lgr5-CD44-EpCAM-cells were separately isolated using fluorescence-activated cell sorting (FACS). Colony formation, self-renewal, differentiation, and tumorigenic properties of these cells were investigated through in vitro experiments and in vivo tumor xenograft models. The expression of stemness genes and CSC- and epithelial-mesenchymal transition (EMT)-related genes, such as KLF4, Oct4, Sox2, Nanog, CD133, CD44, CD166, ALDH1, Lgr5, E-cadherin, ZO-1, Vimentin, Snail, Slug, and Twist, was examined using real-time PCR. RESULTS Lgr5-positive subpopulations exhibited higher capacities for colony formation, self-renewal, differentiation, and tumorigenicity as well as higher expression of stemness genes and mesenchymal genes and lower expression of epithelial genes than did Lgr5-negative subpopulations. CONCLUSIONS Our data revealed that tumorigenic cells were highly restricted to Lgr5-positive subpopulations. Most importantly, Lgr5+CD44+EpCAM+ cells exhibited more pronounced CSC-like traits than did any other subpopulation, indicating that Lgr5 combined with CD44 and EpCAM can further improve the stem-like traits of CSCs in colorectal cancer.

UI MeSH Term Description Entries
D008807 Mice, Inbred BALB C An inbred strain of mouse that is widely used in IMMUNOLOGY studies and cancer research. BALB C Mice, Inbred,BALB C Mouse, Inbred,Inbred BALB C Mice,Inbred BALB C Mouse,Mice, BALB C,Mouse, BALB C,Mouse, Inbred BALB C,BALB C Mice,BALB C Mouse
D008819 Mice, Nude Mutant mice homozygous for the recessive gene "nude" which fail to develop a thymus. They are useful in tumor studies and studies on immune responses. Athymic Mice,Mice, Athymic,Nude Mice,Mouse, Athymic,Mouse, Nude,Athymic Mouse,Nude Mouse
D008856 Microscopy, Fluorescence Microscopy of specimens stained with fluorescent dye (usually fluorescein isothiocyanate) or of naturally fluorescent materials, which emit light when exposed to ultraviolet or blue light. Immunofluorescence microscopy utilizes antibodies that are labeled with fluorescent dye. Fluorescence Microscopy,Immunofluorescence Microscopy,Microscopy, Immunofluorescence,Fluorescence Microscopies,Immunofluorescence Microscopies,Microscopies, Fluorescence,Microscopies, Immunofluorescence
D002454 Cell Differentiation Progressive restriction of the developmental potential and increasing specialization of function that leads to the formation of specialized cells, tissues, and organs. Differentiation, Cell,Cell Differentiations,Differentiations, Cell
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000066673 Cell Self Renewal The ability of certain cell types, such as progenitor cells or tumor cells, to go through numerous cycles of CELL DIVISION while still maintaining an undifferentiated or partially differentiated state. Stem Cell Renewal,Stem Cell Self-Renewal,Cell Renewal, Stem,Cell Renewals, Stem,Cell Self Renewals,Cell Self-Renewal, Stem,Cell Self-Renewals, Stem,Renewal, Cell Self,Renewal, Stem Cell,Renewals, Cell Self,Renewals, Stem Cell,Self Renewal, Cell,Self Renewals, Cell,Self-Renewal, Stem Cell,Self-Renewals, Stem Cell,Stem Cell Renewals,Stem Cell Self Renewal,Stem Cell Self-Renewals
D000071858 Epithelial Cell Adhesion Molecule A cell adhesion molecule that is expressed on the membranes of nearly all EPITHELIAL CELLS, especially at the junctions between intestinal epithelial cells and intraepithelial LYMPHOCYTES. It also is expressed on the surface of ADENOCARCINOMA and epithelial tumor cells. It may function in the MUCOSA through homophilic interactions to provide a barrier against infection. It also regulates the proliferation and differentiation of EMBRYONIC STEM CELLS. Antigen, CD326,CD326 Protein,ESA Antigen,Ep-CAM,EpCAM,Epithelial Specific Antigen,GA 733 Tumor-Associated Antigen,GA733 Antigen,GA733 Tumor-Associated Antigen,Tacstd1 Protein,Tumor-Associated Antigen GA733,Antigen, ESA,Antigen, Epithelial Specific,Antigen, GA733,CD326 Antigen,GA 733 Tumor Associated Antigen,GA733 Tumor Associated Antigen,GA733, Tumor-Associated Antigen,Tumor Associated Antigen GA733,Tumor-Associated Antigen, GA733
D000090062 Kruppel-Like Factor 4 A member of zinc finger-containing transcription factors that belongs to the KRUPPEL-LIKE FACTOR family, involved in the regulation of diverse cellular processes such as cell growth, proliferation, differentiation, and APOPTOSIS. EZF Protein,Endothelial Kruppel-Like Zinc Finger Protein,Epithelial Zinc Finger Protein,GKLF Protein,Gut-Enriched Kruppel-Like Factor,Klf4 Protein,Krueppel-Like-Factor 4,4, Krueppel-Like-Factor,4, Kruppel-Like Factor,Endothelial Kruppel Like Zinc Finger Protein,Factor 4, Kruppel-Like,Factor, Gut-Enriched Kruppel-Like,Gut Enriched Kruppel Like Factor,Kruppel Like Factor 4,Protein, EZF,Protein, GKLF,Protein, Klf4
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia

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