Table 2: The main biomarkers of Cancer Stem Cells (CSCs).

Type of Biomarker Data from Research Studies Potential Clinical Implications Author, Year
Reference
CD133
a marker of cancer stem-like cells in colorectal cancer
CD133 is an efficient prognostic factor in colorectal cancer, according to the meta-analysis results higher CD133 expression is correlated with worse disease-free survival & overall survival in patients with colorectal cancer;
worse clinical outcome and clinicopathological factors (e.g.: T category, N category and vascular invasion in patients with colorectal cancer) have been associated with higher CD133 expression
Chen S et al.
2013 [17]
CD44
a hyaluronic acid receptor, a heat stable antigen,
a surface marker, expressed by tumor cells
adhesion & homing of CSCs to the stem cell niche;
its expression varies at various tumor stages, and in different types of cancer
the role of CD44 (as CSC surface marker) in tumor initiation, development, and metastasis has currently been analyzed Jaggupilli
et al.
2012 [18]
EpCAM (CD326)
(epithelial cell adhesion molecule)
a glycoprotein,
a marker for carcinoma
cell adhesion, proliferation, migration, in cancer & stem cell signaling;
characterized by high expression on rapidly proliferating tumors from epithelial tissue;
cell surface expression of EpCAM can prevent cell-cell adhesion.
EpCAM is not limited only to cell adhesion, but is also involved in various processes (e.g.: signaling, cell migration, proliferation, and differentiation);
EpCAM has prognostic relevance in carcinoma, inflammatory pathophysiology, and tissue development or regeneration, in addition to its role in epithelial homeostasis.
Trzpis et al.
2007 [19]