Abstract
Cardiac glycosides (CGs) which are composed of aglycone moiety and glycone moiety occur mainly in plants. CGs increase cardiac contractility by inhibiting the sodium-potassium-adenosine triphosphatase (Na+/K+ ATPase) of plasma membrane and are widely used in the treatment of chronic heart failure. New findings within recent years have revealed that CGs are involved in selective control of tumor proliferation. Inhibition of Na+/K+ ATPase by CGs induces antiproliferative downstream effects which are related to cell growth and apoptosis. As anticancer effects of CGs occur also below their cardiotoxic concentration, Na+/K+ ATPase independent pathways are also proposed. Some CGs are almost completely nontoxic to rodent-derived tumor cell lines but potently inhibit proliferation human tumor cell lines. Some of the CGs, in nontoxic concentrations, are able to induce apoptosis in human promyelocytic leukemia cells (HL60) but not in normal leukocytes. The anticancer effects of CGs are found to be related to the inhibition of tissue kallikrein expression, anoikis sensitizers, inhibition on topoisomerase, blockade of NF-kB activation, and suppression of general protein synthesis. However, the viewpoint and evidence of CGs as anticancer agents in clinical application are still controversial.
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- bcl-2:
-
B cell lymphoma/leukemia-2
- Ca2+ :
-
Calcium ion
- c-FOS:
-
FBJ osteosarcoma oncogene
- CGs:
-
Cardiac glycosides
- c-myc:
-
v-myc myelocytomatosis viral oncogene homolog (avian)
- DNA:
-
Deoxyribonucleic acid
- EDLC:
-
Endogenous digitalis-like compounds
- ER:
-
Estrogen receptor
- ERK:
-
Extracellular signal-regulated kinase
- HL60:
-
Human promyelocytic leukemia cells
- IkBa:
-
I kappa B alpha
- JAK2:
-
Janus kinase 2
- JNK:
-
c-Jun NH2-terminal kinase
- KLK:
-
Kallikreins
- MAPK:
-
Mitogen-activated protein kinase
- MCF-7:
-
Michigan Cancer Foundation – 7
- MEK:
-
MAPK/ERK kinase
- mRNA:
-
Messenger ribose nucleic acid
- Na+/Ca2+ exchanger:
-
Sodium-calcium exchanger
- Na+/K+ ATPase:
-
Sodium-potassium-adenosine triphosphatase
- NF-κB:
-
Nuclear factor kappa-light-chain enhancer of activated B cells
- p21:
-
Protein 21
- p53:
-
Protein 53 or tumor protein 53
- PI3K:
-
Phosphoinositide-3 kinase
- PPC-1:
-
Primary prostatic carcinoma cell line
- PSA:
-
Prostate-specific antigen
- PUMA:
-
p53 upregulated modulator of apoptosis
- Rac1:
-
Ras-related C3 botulinum toxin substrate l
- SCID:
-
Severe combined immune deficiency
- Src:
-
Sarcoma
- t1/2 :
-
Half-life
- TNFR:
-
Tumor necrosis factor receptor
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Lin, Y., Chen, D., Wang, L., Ye, D. (2013). Cardiac Glycosides and Anticancer Activity. In: Ramawat, K., Mérillon, JM. (eds) Natural Products. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-22144-6_159
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DOI: https://doi.org/10.1007/978-3-642-22144-6_159
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