breast cancer-initiating cells: insights into novel treatment strategies

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ID: 147386
2011
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Ranked #119 of 132 articles by views in The Journal of investigative dermatology

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Abstract
There is accumulating evidence that breast cancer may arise from mutated mammary stem/progenitor cells which have been termed breast cancer-initiating cells (BCIC). BCIC identified in clinical specimens based on membrane phenotype (CD44+/CD24−/low and/or CD133+ expression) or enzymatic activity of aldehyde dehydrogenase 1 (ALDH1+), have been demonstrated to have stem/progenitor cell properties, and are tumorigenic when injected in immunocompromized mice at very low concentrations. BCIC have also been isolated and in vitro propagated as non-adherent spheres of undifferentiated cells, and stem cell patterns have been recognized even in cancer cell lines. Recent findings indicate that aberrant regulation of self renewal is central to cancer stem cell biology. Alterations in genes involved in self-renewal pathways, such as Wnt, Notch, sonic hedgehog, PTEN and BMI, proved to play a role in breast cancer progression. Hence, targeting key elements mediating the self renewal of BCIC represents an attractive option, with a solid rationale, clearly identifiable molecular targets, and adequate knowledge of the involved pathways. Possible concerns are related to the poor knowledge of tolerance and efficacy of inhibiting self-renewal mechanisms, because the latter are key pathways for a variety of biological functions and it is unknown whether their interference would kill BCIC or simply temporarily stop them. Thus, efforts to develop BCIC-targeted therapies should not only be focused on interfering on self-renewal, but could seek to identify additional molecular targets, like those involved in regulating EMT-related pathways, in reversing the MDR phenotype, in inducing differentiation and controlling cell survival pathways.
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daidone2011cancersbreast Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Maria Grazia Daidone;Nadia Zaffaroni;Mara Binda;Guido Santilli
Journal The Journal of investigative dermatology
Year 2011
DOI
10.3390/cancers3011405
URL
http://www.mdpi.com/2072-6694/3/1/1405/
Keywords
Drug resistance prognosis Oncology including cancer and carcinogens tumors drug targetsneoplasms

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