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Nestin expressing progenitor cells in pulmonary vasculature

Farhan Saboor, Claudia Berndt, Norbert Weissmann, Ralph Schermuly, Dieter Müller, Ralf Middendorff
European Respiratory Journal 2011 38: p3342; DOI:
Farhan Saboor
1AG Signal Transduction, Institute of Anatomy and Cell Biology, Giessen, Germany
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Claudia Berndt
1AG Signal Transduction, Institute of Anatomy and Cell Biology, Giessen, Germany
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Norbert Weissmann
2Department of Internal Medicine, Medical Clinic II, Giessen, Germany
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Ralph Schermuly
2Department of Internal Medicine, Medical Clinic II, Giessen, Germany
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Dieter Müller
1AG Signal Transduction, Institute of Anatomy and Cell Biology, Giessen, Germany
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Ralf Middendorff
1AG Signal Transduction, Institute of Anatomy and Cell Biology, Giessen, Germany
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Abstract

Vascular smooth muscle cells (VSMCs) and pericytes (PCs), distinguished by the expression of neuronal stem cell marker “Nestin”, may represent stem cell-like progenitor cells for tissues in various organs. In one of our previous studies, we found that nestin-expressing VSMCs and PCs in testicular blood vessels are the progenitors of testosterone producing Leydig cells.

To analyze the expression pattern of nestin and its role as marker for proliferating progenitor cells in the lung, nestin expression and localization was investigated during postnatal development in nestin-GFP mice. To investigate nestin expression during vascular remodelling, samples from two models of pulmonary hypertension (PH) [monocrotaline (MCT) rat model and hypoxic mouse model] as well as human samples from patients of PH were analyzed. Nestin data was compared with expression of proliferation markers (PCNA, Ki67) and PDGF receptors.

Nestin was found in a subpopulation of VSMCs and PCs of lung vasculature. As compared to adult normoxic controls significantly higher nestin expression was observed in pulmonary vasculature of postnatal tissues and in adult lungs between day 3-7 of hypoxic exposure but not at later time points when PH became evident. Increase of nestin correlated well with an increase of cell proliferation. In hypoxic lungs peak of phosphorylated (activated) PDGF receptor β correlated with nestin one. Increase of nestin-immunoreactive VSMCs and PCs was also found in MCT rat and human lung samples.

Certain contractile cells capable of proliferation could be identified by Nestin expression in lungs and may be used as prognostic marker and new target for therapeutic interventions of diseases like PH.

  • © 2011 ERS
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Nestin expressing progenitor cells in pulmonary vasculature
Farhan Saboor, Claudia Berndt, Norbert Weissmann, Ralph Schermuly, Dieter Müller, Ralf Middendorff
European Respiratory Journal Sep 2011, 38 (Suppl 55) p3342;

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Nestin expressing progenitor cells in pulmonary vasculature
Farhan Saboor, Claudia Berndt, Norbert Weissmann, Ralph Schermuly, Dieter Müller, Ralf Middendorff
European Respiratory Journal Sep 2011, 38 (Suppl 55) p3342;
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