Journal of Gastrointestinal & Digestive System
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Influence of CD133
expression on patients? survival and resistance of CD133
cells to anti-tumor agents were studied in
gastric cancer (GC).
Methods & Results:
As revealed by Western blot, the lower CD133
group had a significantly better survival as compared to the higher
group (P=0.014). From CD133
subpopulation (28.0% ? 2.0%) for KATO-III cells, the highest content ratio among four
measured cells lines and cancerous ascites from GC patient, could be enriched following the immunomagnetic separation (IMS) (91.0%
? 3.0%) and then at 1 wk of floating culture (95.0% ? 2.0%). The population doubling time was 21.0 ? 3.0 h vs. 40.0 ? 8.0 h in CD133
cells by CCK-8 assay; respectively (P<0.05). As shown, a single CD133
cell was capable of generating new cell colony and
the tumorigenicity rate in nude mice was 100.0% (5/5) for CD133
clonal spheres or for CD133
cells, but 0.0% (0/5) for CD133
The significantly higher mRNA level of Oct-4, Sox-2, Musashi-1, and ABCG2 in CD133
clonal spheres could be identified comparing
to that in either CD133
cells or in CD133
cells. Under the treatment of 5-FU, cisplatin or VP-16, CD133
cells had significantly lower
suppression rates of cell growth in comparison with those in CD133
cells while lower level of Bcl-2 mRNA and higher level of Bax
mRNA were simultaneously found in CD133
cells comparing to that in CD133
The patients with lower CD133
expression had a better survival. Enriched CD133
cells in clonal sphere with higher
mRNA level of Oct-4, Sox-2, Musashi-1, and ABCG2 shared the ability to be self-renewable, proliferative, tumorigenic and resistant to
anti-tumor agent as probably regulated by genetic products of Bcl-2 and Bax.
Ji-wei Yu has completed her M.D. at the age of 25 years from Shanghai Jiao-tong University School of Medicine and postdoctoral studies for Ph.D.
from Shanghai Jiao-tong University School of Medicine. She is the Director of 1
Department of General Surgery. She has published more than 50
papers in reputed journals and is serving as an editorial board member of repute.
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