Lung self-assembly is modulated by tissue surface tensions

Margaret A. Schwarz, Haihua Zheng, Susan Legan, Ramsey A. Foty

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

To identify cell-intrinsic properties that facilitate interaction between epithelial endodermal and mesenchymal mesodermal cells during lung morphogenesis, we developed a model of lung self-assembly that mimics fetal lung formation in structure, polarity, vasculature, and extracellular matrix expression. Three-dimensional pulmonary bodies (PBs) spontaneously self-assemble from single-cell suspensions and exhibit liquid-like properties that allow measurements of compaction rate and cohesion, and that may help to specify cellular self-organization. We hypothesized that changes in one or more of these parameters could potentially explain the lung hypoplasia associated with abnormal lung development. We examined the impact of endothelial/monocyte- activating polypeptide (EMAP) II in PBs, because EMAPII is highly expressed in lung hypoplasia. EMAPII significantly increased compaction rate and decreased overall cohesion of PBs composed of both epithelial and mesenchymal cells. Moreover, the effects of EMAPII on compaction and cohesion act exclusively through the mesenchymal cell population by interfering with fibronectin matrix assembly. We also show that EMAPII alters epithelial cell polarity and surfactant protein C expression. Our findings demonstrate, for the first time, that PBs possess liquid-like properties that can help to guide the self-assembly of fetal lungs, and that EMAPII expression can influence both mesenchymal and epithelial cells but through different molecular mechanisms.

Original languageEnglish (US)
Pages (from-to)682-691
Number of pages10
JournalAmerican Journal of Respiratory Cell and Molecular Biology
Volume44
Issue number5
DOIs
StatePublished - May 1 2011

Fingerprint

Surface Tension
Self assembly
Surface tension
Compaction
Tissue
Lung
Liquids
Protein C
Fibronectins
Surface-Active Agents
Suspensions
Cells
Epithelial Cells
Cell Polarity
Morphogenesis
Extracellular Matrix

Keywords

  • Cell-cell interactions
  • Cohesion
  • Extracellular matrix
  • Polarity

ASJC Scopus subject areas

  • Cell Biology
  • Pulmonary and Respiratory Medicine
  • Molecular Biology
  • Clinical Biochemistry

Cite this

Lung self-assembly is modulated by tissue surface tensions. / Schwarz, Margaret A.; Zheng, Haihua; Legan, Susan; Foty, Ramsey A.

In: American Journal of Respiratory Cell and Molecular Biology, Vol. 44, No. 5, 01.05.2011, p. 682-691.

Research output: Contribution to journalArticle

Schwarz, Margaret A. ; Zheng, Haihua ; Legan, Susan ; Foty, Ramsey A. / Lung self-assembly is modulated by tissue surface tensions. In: American Journal of Respiratory Cell and Molecular Biology. 2011 ; Vol. 44, No. 5. pp. 682-691.
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