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Cryptotanshinone targets tumor-initiating cells through down-regulation of stemness genes expression
Ying Zhang1, Stephanie M Cabarcas2, J I Zheng2
1Cancer Stem Cell Section, Laboratory of Cancer Prevention, National Cancer Institute-Frederick, Center for Cancer Research, Frederick, MD 21702, USA; Oncology Department, Guang An Men Hospital of China Academy of Chinese Medical Sciences, Beijing 100053, P.R. China.
Abstract:
Recent evidence indicates that tumor-initiating cells (TICs), also called cancer stem cells (CSCs), are responsible for tumor initiation and progression, therefore representing an important cell population that may be used as a target for the development of future anticancer therapies. In the present study, Cryptotanshinone (CT), a traditional Chinese herbal medicine, was demonstrated to regulate the behaviors of LNCaP prostate cells and prostate LNCaP TICs. The results demonstrate that treatment with CT alters cellular proliferation, cell cycle status, migration, viability, colony formation and notably, sphere formation and down-regulation of stemness genes (Nanog, OCT4, SOX2, β-catenin, CXCR4) in TICs. The present study demonstrates that CT targets the LNCaP CD44+CD24- population that is representative of prostate TICs and also affects total LNCaP cells as well via down-regulation of stemness genes. The strong effect with which CT has on prostate TICs suggests that CT may potentially function as a novel natural anticancer agent that specifically targets TICs.
Insights
Cryptotanshinone (CT) targets prostate tumor-initiating cells (TICs), also known as cancer stem cells (CSCs). This natural compound reduces TIC stemness, proliferation, and migration, suggesting potential as a novel anticancer therapy.
Area of Science:
- Oncology
- Pharmacology
- Cell Biology
Background:
- Tumor-initiating cells (TICs), or cancer stem cells (CSCs), drive tumor initiation and progression.
- Targeting TICs is a promising strategy for developing novel anticancer therapies.
Purpose of the Study:
- To investigate the effects of Cryptotanshinone (CT) on LNCaP prostate cancer cells and their TICs.
- To evaluate CT's potential as a natural anticancer agent targeting TICs.
Main Methods:
- Treatment of LNCaP cells and prostate TICs with Cryptotanshinone (CT).
- Assessment of cellular proliferation, cell cycle, migration, viability, and colony formation.
- Analysis of sphere formation and expression of stemness genes (Nanog, OCT4, SOX2, β-catenin, CXCR4).
- Identification of CT's specific target population within LNCaP cells (CD44+CD24-).
Main Results:
- CT treatment altered proliferation, cell cycle, migration, and viability of LNCaP cells and TICs.
- CT significantly inhibited sphere formation in TICs.
- CT downregulated key stemness genes in TICs, including Nanog, OCT4, SOX2, β-catenin, and CXCR4.
- CT specifically targeted the CD44+CD24- population, representative of prostate TICs.
Conclusions:
- Cryptotanshinone (CT) effectively targets prostate tumor-initiating cells (TICs).
- CT exhibits anticancer properties by reducing TIC stemness and affecting cellular behaviors.
- CT shows potential as a novel natural anticancer agent with specific TIC-targeting capabilities.
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