Tenascin-C inactivation impacts lung structure and function beyond lung development

Gremlich, Sandrine; Roth-Kleiner, Matthias; Equey, Lucile; Fytianos, Kleanthis; Schittny, Johannes C.; Cremona, Tiziana P. (2020). Tenascin-C inactivation impacts lung structure and function beyond lung development. Scientific Reports, 10(1), p. 5118. Nature Publishing Group 10.1038/s41598-020-61919-x

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Tenascin-C (TNC) is an extracellular matrix protein expressed at high levels during lung organogenesis. Later, TNC is only transiently de novo expressed to orchestrate tissue repair in pathological situations. We previously showed that TNC inactivation affects lung development and thus evaluated here the implications on lung function in newborn/adult mice. Respiratory function parameters were measured in anesthetized and mechanically ventilated wild-type (WT) and TNC-deficient mice at 5 (P5) and 90 (P90) days of age under basal conditions, as well as following high tidal volume (HTV) ventilation. At P5, TNC-deficient mice showed an increased static compliance (Cst) and inspiratory capacity (IC) relative to WT at baseline and throughout HTV. At P90, however, Cst and IC were only elevated at baseline. Control non-ventilated newborn and adult TNC-deficient mice showed similar lung morphology, but less alpha smooth muscle actin (α-SMA) around small airways. SMA + cells were decreased by 50% in adult TNC-deficient lungs and collagen layer thickened around small airways. Increased surfactant protein C (SP-C) and altered TGFβ and TLR4 signaling pathways were also detected. Thus, TNC inactivation-related defects during organogenesis led to persisting functional impairment in adulthood. This might be of interest in the context of pulmonary diseases with thickened airway smooth muscle layer or ventilation heterogeneity, like asthma and COPD.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Gastro-intestinal, Liver and Lung Disorders (DMLL) > Clinic of Pneumology
04 Faculty of Medicine > Pre-clinic Human Medicine > Institute of Anatomy
04 Faculty of Medicine > Pre-clinic Human Medicine > Institute of Anatomy > Topographical and Clinical Anatomy
04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR) > Forschungsbereich Mu50 > Forschungsgruppe Pneumologie (Erwachsene)

Graduate School:

Graduate School for Cellular and Biomedical Sciences (GCB)

UniBE Contributor:

Fytianos, Kleanthis; Schittny, Johannes and Cremona, Tiziana Patrizia

Subjects:

600 Technology > 610 Medicine & health
500 Science > 570 Life sciences; biology

ISSN:

2045-2322

Publisher:

Nature Publishing Group

Funders:

[4] Swiss National Science Foundation

Language:

English

Submitter:

Johannes Schittny

Date Deposited:

20 Apr 2020 08:44

Last Modified:

26 Apr 2020 02:47

Publisher DOI:

10.1038/s41598-020-61919-x

PubMed ID:

32198404

BORIS DOI:

10.7892/boris.142188

URI:

https://boris.unibe.ch/id/eprint/142188

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