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A Three-dimensional Model of Spheroids to Study Colon Cancer Stem Cells

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CD133+ CD44+ subgroups may be human small intestinal stem cells.

Neng-Yi Hou¹, Kun Yang, Tie Chen

¹Department of Gastrointestinal Surgery, West China Hospital, Sichuan University, No. 37 Guo Xue Xiang, Chengdu, 610041, Sichuan Province, People's Republic of China.

Molecular Biology Reports

|June 8, 2010

Summary

This summary is machine-generated.

Researchers identified CD133(+)CD44(+) cells as potential human small intestinal epithelial stem cells. This finding aids in the preliminary identification and separation of these crucial cells for further study.

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Area of Science:

Gastroenterology
Stem Cell Biology
Cellular and Molecular Medicine

Background:

Identifying and isolating small intestinal epithelial stem cells is challenging.
Current methods for stem cell identification are preliminary.

Purpose of the Study:

To investigate CD133 and CD44 as potential markers for human small intestinal epithelial stem cells.
To explore the expression of Lgr5 in relation to CD133 and CD44 markers.

Main Methods:

Immunohistochemistry was used to study the expression of CD133, CD44, and Lgr5.
Fluorescence-activated cell sorting (FACS) was employed to isolate cell subgroups based on CD133 and CD44 expression.
RT-PCR and PAGE with silver staining were utilized to measure Lgr5 gene expression levels.

Main Results:

Immunohistochemistry showed overlapping expression of CD133, CD44, and Lgr5 in cells at the bottom of crypts.
FACS analysis identified distinct percentages for CD133(+)CD44(+), CD133(+)CD44(-), CD133(-)CD44(+), and CD133(-)CD44(-) cell populations.
Lgr5 gene expression was significantly higher in the CD133(+)CD44(+) subgroup compared to other subgroups (P < 0.001).

Conclusions:

CD133(+)CD44(+) cells show promise as human small intestinal epithelial stem cells.
Further research is required to confirm the definitive role of these cells.
This study provides a foundation for improved stem cell isolation techniques.