Improving cancer therapy by targeting cancer stem cells: Directions, challenges, and clinical results

Table 1 Commonly used Cancer Stem Cells Markers

Marker	Association with chemoresistance	Reported malignancies
CD34		Hematological malignancies (in combination with CD38)[8,36]
CD38		Hematological malignancies (in combination with CD34)[8,36]
CD24	Yes (in combination with CD44)[63]	Breast, prostate, pancreas (in combination with CD44)[15,23]
CD44	Yes (in combination with CD24)[63]	Breast, pancreas, stomach, prostate, head and neck, ovary, colon (in combination with CD24)[15,23]
CD133	Yes[24,25]	Brain, pancreas, lung, liver, prostate, stomach, colon, head and neck[15,23]
ALDH	Yes[60,61]	Breast, lung, head and neck, colon, liver, ovary[15,26]

ALDH: Aldehyde dehydrogenase.