Review Article

Advances and Challenges in Cancer Stem Cells for Onco-Therapeutics

Table 1

Differences between cancer epithelial cells and CSCs.

Cancer epithelial cellsCSCs

Noninvasive with limited self-renewal potential and usually divide with a finite replicative capacity [24]Invasive, migratory properties. CSCs exhibit self-renewal capabilities, allowing them to give rise to both identical CSCs and differentiated cancer cells, contributing to tumor perpetuation [25]

Typically more differentiated and closely resemble mature cell types [26]. They often form the bulk of the tumorLess differentiated and exhibit properties akin to stem cells. They can differentiate into various cell types found within the tumor [25]

Cell polarity often responsible for initiating the tumor. They are derived from CSCs or non-CSC tumor cells [27].CSCs have the unique ability to initiate tumor growth when transplanted into animal models, and they are considered the “seeds” of the tumor [28]

High expression of cell adhesion molecules [29]Low (focal point) adhesion [30]

They usually display limited heterogeneity and represent the dominant, mature cell population within the tumor [31]CSCs contribute to intratumoral heterogeneity by giving rise to both CSCs and differentiated cancer cells, resulting in a diverse cell population [32]

Nonmotile [33]Highly mobile with stem cell-like behavior [25]

TGFβ can lead to epithelial mesenchymal transition, promote metastasis and invasion [27]. Hence it can count as biomarkerCSCs express distinctive stem cell markers, including CD44, CD133, and specific transcription factors (e.g., OCT4, SOX2, NANOG), associated with pluripotency and self-renewal [34]