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Open AccessArticle

Distinct Properties of Human M-CSF and GM-CSF Monocyte-Derived Macrophages to Simulate Pathological Lung Conditions In Vitro: Application to Systemic and Inflammatory Disorders with Pulmonary Involvement

1
Univ Rennes, CHU Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail)-UMR_S 1085, F-35000 Rennes, France
2
Department of Internal Medicine, Rennes University Hospital, 35203 Rennes, France
3
Pôle Biologie, Rennes University Hospital, 35203 Rennes, France
4
Department of Respiratory Diseases, Rennes University Hospital, 35203 Rennes, France
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2018, 19(3), 894; https://doi.org/10.3390/ijms19030894
Received: 8 March 2018 / Revised: 15 March 2018 / Accepted: 15 March 2018 / Published: 17 March 2018
(This article belongs to the Special Issue Macrophages in Inflammation)
Macrophages play a central role in the pathogenesis of inflammatory and fibrotic lung diseases. However, alveolar macrophages (AM) are poorly available in humans to perform in vitro studies due to a limited access to broncho-alveolar lavage (BAL). In this study, to identify the best alternative in vitro model for human AM, we compared the phenotype of AM obtained from BAL of patients suffering from three lung diseases (lung cancers, sarcoidosis and Systemic Sclerosis (SSc)-associated interstitial lung disease) to human blood monocyte-derived macrophages (MDMs) differentiated with M-CSF or GM-CSF. The expression of eight membrane markers was evaluated by flow cytometry. Globally, AM phenotype was closer to GM-CSF MDMs. However, the expression levels of CD163, CD169, CD204, CD64 and CD36 were significantly higher in SSc-ILD than in lung cancers. Considering the expression of CD204 and CD36, the phenotype of SSc-AM was closer to MDMs, from healthy donors or SSc patients, differentiated by M-CSF rather than GM-CSF. The comparative secretion of IL-6 by SSc-MDMs and SSc-AM is concordant with these phenotypic considerations. Altogether, these results support the M-CSF MDM model as a relevant in vitro alternative to simulate AM in fibrotic disorders such as SSc. View Full-Text
Keywords: macrophages; polarization; M-CSF; GM-CSF; lung; interstitial lung disease; lung cancers; systemic sclerosis; sarcoidosis; flow cytometry macrophages; polarization; M-CSF; GM-CSF; lung; interstitial lung disease; lung cancers; systemic sclerosis; sarcoidosis; flow cytometry
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MDPI and ACS Style

Lescoat, A.; Ballerie, A.; Augagneur, Y.; Morzadec, C.; Vernhet, L.; Fardel, O.; Jégo, P.; Jouneau, S.; Lecureur, V. Distinct Properties of Human M-CSF and GM-CSF Monocyte-Derived Macrophages to Simulate Pathological Lung Conditions In Vitro: Application to Systemic and Inflammatory Disorders with Pulmonary Involvement. Int. J. Mol. Sci. 2018, 19, 894.

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