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Methods of identification lung cancer stem cells: a pilot study

Agata Raniszewska, Iwona Kwiecień, Joanna Domagała-Kulawik
European Respiratory Journal 2017 50: PA3301; DOI: 10.1183/1393003.congress-2017.PA3301
Agata Raniszewska
1Department of Pathology, Medical University of Warsaw, Warsaw, Poland
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Iwona Kwiecień
2Department of Pathology, Medical University of Warsaw and Laboratory of Flow Cytometry and Hematology- Department of Internal Medicine and Hematology, Military Medical Institute, Warsaw, Poland
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Joanna Domagała-Kulawik
3Department of Internal Diseases, Pneumonology and Allergology, Medical University of Warsaw, Warsaw, Poland
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Abstract

Introduction: There is a growing body of evidence that cancer stem cells (CSCs) are responsible for tumor initiation, maintenance of tumor bulk and its metastatic potential. Therapy resistance of lung tumor is thought to be related to CSCs. Unfortunately data on the identifying CSCs are discordant and cannot be used in practice.

Aim: The aim of the study was to develop the method to identify CSCs in lung cancer patients.

Methods: Flow cytometry was applied to identify circulating CSCs in the peripheral blood using anti-CD133 and anti-EpCAM antibodies. Events were collected from the lymphocyte gate on the FSC/SSC dot plot and read on the CD133(+) versus EpCAM (+) dot plot. Additionally, confocal microscopy was used to identify CSCs in lung cancer tissue using anti-CD44 and anti-CD90 antibodies.

Results: So far 10 patients were enrolled to the study. Analysis of peripheral blood revealed the presence of CD133(+) cells (median value 6,3%) in each sample, EpCAM (+) cells in 8/10 samples (median value 0,2%) and CD133(+)EpCAM(+) cells in 9/10 samples (median value 0,1%). In our opinion only the latter population is representative for CSCs. We also identify small number of CD44(+)CD90(+) cells in lung cancer tissue sample by confocal microscopy.

Conclusions: Initially we confirmed the presence of putative CSCs in the circulation of lung cancer patients and in lung tumor sample. This study revealed the utility of flow cytometry and confocal microscopy in identifying lung CSCs.

  • Copyright ©the authors 2017
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Methods of identification lung cancer stem cells: a pilot study
Agata Raniszewska, Iwona Kwiecień, Joanna Domagała-Kulawik
European Respiratory Journal Sep 2017, 50 (suppl 61) PA3301; DOI: 10.1183/1393003.congress-2017.PA3301

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Methods of identification lung cancer stem cells: a pilot study
Agata Raniszewska, Iwona Kwiecień, Joanna Domagała-Kulawik
European Respiratory Journal Sep 2017, 50 (suppl 61) PA3301; DOI: 10.1183/1393003.congress-2017.PA3301
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