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Marker for cancer stem cells

Fluorescent probe identifies tumor-initiating cells

Date:
April 4, 2018
Source:
Wiley
Summary:
Cells with stem-cell characteristics appear to be especially important in the formation and metastasis of tumors. Scientists have now developed a universal fluorescent probe for these 'cancer stem cells.' This dye also selectively kills off the cells.
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Cells with stem-cell characteristics appear to be especially important in the formation and metastasis of tumors. Scientists have now developed a universal fluorescent probe for these "cancer stem cells." As reported in the journal Angewandte Chemie, this dye also selectively kills off the cells.

"Cancer stem cells," also known as tumor-initiating cells (TIC), appear to cause relapses after radiation and chemotherapy because a single surviving TIC can cause a new tumor to grow. In addition, they appear to be the main cause of metastasis. Effective tumor treatment must therefore aim to kill off TICs as extensively as possible. To this end, a "probe" that marks these cancer stem cells would be useful so that they become visible. Although there are markers that also recognize TICs associated with some types of cancer, no universal, selective probe for cancer stem cells has been found.

A team from the Agency for Science Technology and Research (A*STAR) in Singapore, Pohang University of Science and Technology in Korea, and other research organizations in Singapore and Korea, have now succeeded in finding such a probe. They were able to show that their new probe, a fluorescent dye, selectively stains TICs from a broad variety of cancers, including tumors of the lung, central nervous system, breast, kidney, ovary, colon, and prostate, as well as melanomas. Healthy cells and "ordinary" tumor cells were not marked. At high concentrations, the dye also demonstrates considerable cytotoxicity toward TIC, while other cells are barely affected.

Led by Nam-Young Kang and Young-Tae Chang, the researchers discovered that their probe, named TiY (for tumor-initiating cell probe yellow), recognizes vimentin, which is a molecule in the cytoskeleton. Vimentin is more concentrated in epithelial cells when they transform into mesenchymal cells. Epithelial cells form the tissue that covers the inner and outer surfaces of the body, forming a boundary with the environment. The cells are polar, meaning that the side facing toward the underlying tissue and the side directed outward toward the lumen are different. The cells are also firmly integrated into the cell wall. When they transform into mesenchymal cells, they lose their polarity, are freed from the cell structure, and may wander. This process plays an important role in the development of embryos and healing of wounds. It is also involved in the metastasis of tumors.

As the first fluorescent probe for TIC, TiY could be a valuable tool for the visualization and isolation of TIC, and may help in the development of tumor treatments that are targeted toward zones concentrated with vimentin, thereby inhibiting relapses.


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Materials provided by Wiley. Note: Content may be edited for style and length.


Journal Reference:

  1. Yong-An Lee, Jong-Jin Kim, Jungyeol Lee, Jia Hui Jane Lee, Srikanta Sahu, Haw-Young Kwon, Sung-Jin Park, Se-Young Jang, Jun-Seok Lee, Zhenxun Wang, Wai Leong Tam, Bing Lim, Nam-Young Kang, Young-Tae Chang. Identification of Tumor Initiating Cells with a Small-Molecule Fluorescent Probe by Using Vimentin as a Biomarker. Angewandte Chemie International Edition, 2018; 57 (11): 2851 DOI: 10.1002/anie.201712920

Cite This Page:

Wiley. "Marker for cancer stem cells." ScienceDaily. ScienceDaily, 4 April 2018. <www.sciencedaily.com/releases/2018/04/180404114738.htm>.
Wiley. (2018, April 4). Marker for cancer stem cells. ScienceDaily. Retrieved December 8, 2024 from www.sciencedaily.com/releases/2018/04/180404114738.htm
Wiley. "Marker for cancer stem cells." ScienceDaily. www.sciencedaily.com/releases/2018/04/180404114738.htm (accessed December 8, 2024).

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