Tissue-engineered lungs for in vivo implantation

Thomas H. Petersen, Elizabeth A. Calle, Liping Zhao, Eun Jung Lee, Liqiong Gui, Micha Sam B. Raredon, Kseniya Gavrilov, Tai Yi, Zhen W. Zhuang, Christopher Breuer, Erica Herzog, Laura E. Niklason

Research output: Contribution to journalArticlepeer-review

1003 Scopus citations


Because adult lung tissue has limited regeneration capacity, lung transplantation is the primary therapy for severely damaged lungs. To explore whether lung tissue can be regenerated in vitro, we treated lungs from adult rats using a procedure that removes cellular components but leaves behind a scaffold of extracellular matrix that retains the hierarchical branching structures of airways and vasculature. We then used a bioreactor to culture pulmonary epithelium and vascular endothelium on the acellular lung matrix. The seeded epithelium displayed remarkable hierarchical organization within the matrix, and the seeded endothelial cells efficiently repopulated the vascular compartment. In vitro, the mechanical characteristics of the engineered lungs were similar to those of native lung tissue, and when implanted into rats in vivo for short time intervals (45 to 120 minutes) the engineered lungs participated in gas exchange. Although representing only an initial step toward the ultimate goal of generating fully functional lungs in vitro, these results suggest that repopulation of lung matrix is a viable strategy for lung regeneration.

Original languageEnglish (US)
Pages (from-to)538-541
Number of pages4
Issue number5991
StatePublished - Jul 30 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General


Dive into the research topics of 'Tissue-engineered lungs for in vivo implantation'. Together they form a unique fingerprint.

Cite this