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Airway remodeling in a mouse asthma model assessed by in-vivo respiratory-gated micro-computed tomography

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Abstract

The aim of our study was to evaluate the feasibility of non-invasive respiratory-gated micro-computed tomography (micro-CT) for assessment of airway remodelling in a mouse asthma model. Six female BALB/c mice were challenged intranasally with ovalbumin. A control group of six mice received saline inhalation. All mice underwent plethysmographic study and micro-CT. For each mouse, peribronchial attenuation values of 12 bronchi were measured, from which a peribronchial density index (PBDI) was computed. Mice were then sacrificed and lungs examined histologically. Final analysis involved 10 out of 12 mice. Agreement of measurements across observers and over time was very good (intraclass correlation coefficients: 0.94–0.98). There was a significant difference in PBDI between asthmatic and control mice (−210 vs. −338.9 HU, P = 0.008). PBDI values were correlated to bronchial muscle area (r = 0.72, P = 0.018). This study shows that respiratory-gated micro-CT may allow non-invasive monitoring of bronchial remodelling in asthmatic mice and evaluation of innovative treatment effects.

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Authors and Affiliations

  1. Laboratoire de Physiologie Cellulaire Respiratoire, Université Bordeaux 2, Bordeaux, France

    Mathieu Lederlin, Annaïg Ozier, Michel Montaudon, Hugues Begueret, Olga Ousova, Roger Marthan, Patrick Berger & François Laurent

  2. Institut National de la Santé et de la Recherche Médicale (INSERM), U885, Bordeaux, France

    Mathieu Lederlin, Annaïg Ozier, Michel Montaudon, Hugues Begueret, Olga Ousova, Roger Marthan, Patrick Berger & François Laurent

  3. Unité d’Imagerie Thoracique, CHU Bordeaux, Pessac, France

    Mathieu Lederlin, Michel Montaudon & François Laurent

  4. Unité d’Imagerie Thoracique et Cardiovasculaire, CHU de Bordeaux, Hôpital du Haut-Lévèque, Hôpital Cardiologique, avenue de Magellan, 33604, Pessac, France

    François Laurent

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  1. Mathieu Lederlin
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  2. Annaïg Ozier
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  3. Michel Montaudon
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  4. Hugues Begueret
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  5. Olga Ousova
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  7. Patrick Berger
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  8. François Laurent
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Correspondence to François Laurent.

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Lederlin, M., Ozier, A., Montaudon, M. et al. Airway remodeling in a mouse asthma model assessed by in-vivo respiratory-gated micro-computed tomography. Eur Radiol 20, 128–137 (2010). https://doi.org/10.1007/s00330-009-1541-0

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  • DOI: https://doi.org/10.1007/s00330-009-1541-0

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